/* ==========================================================================
   Millennium AI - Premium Landing Page
   Modern, animated, glass-morphism design
   ========================================================================== */

:root {
    /* Dark Theme (default) */
    --color-bg: #000000;
    --color-bg-secondary: #050508;
    --color-surface: rgba(15, 15, 25, 0.6);
    --color-surface-solid: #0f0f19;
    --color-surface-elevated: rgba(25, 25, 40, 0.8);
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a8;
    --color-text-muted: #606068;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Primary - Soft Purple (matches logo) */
    --color-primary: #9F7AEA;
    --color-primary-hover: #B794F4;
    --color-primary-light: rgba(159, 122, 234, 0.12);
    --color-primary-glow: rgba(159, 122, 234, 0.5);
    
    /* Accents */
    --color-accent-warm: #F59E0B;
    --color-accent-cool: #805AD5;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #B794F4 0%, #9F7AEA 50%, #805AD5 100%);
    --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    --gradient-text: linear-gradient(135deg, #E9D8FD 0%, #D6BCFA 30%, #B794F4 60%, #9F7AEA 100%);
    --gradient-surface: linear-gradient(145deg, rgba(25,25,40,0.5) 0%, rgba(15,15,25,0.8) 100%);
    
    /* Typography */
    --font-primary: 'Space Grotesk', -apple-system, sans-serif;
    --font-secondary: 'Inter', -apple-system, sans-serif;
    --font-display: 'Sora', 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 120px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme */
[data-theme="light"] {
    --color-bg: #fafafa;
    --color-bg-secondary: #f0f0f5;
    --color-surface: rgba(255, 255, 255, 0.7);
    --color-surface-solid: #ffffff;
    --color-surface-elevated: rgba(255, 255, 255, 0.9);
    --color-text: #0a0a0a;
    --color-text-secondary: #505058;
    --color-text-muted: #808088;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(0, 0, 0, 0.15);
    --gradient-text: linear-gradient(135deg, #6B46C1 0%, #805AD5 40%, #9F7AEA 70%, #B794F4 100%);
    --gradient-surface: linear-gradient(145deg, rgba(255,255,255,0.8) 0%, rgba(250,250,255,0.6) 100%);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Smooth theme transition for all CSS variable consumers */
html, body, .hero, .section, .card, .navbar,
.hero-title, .hero-subtitle, .hero-badge,
.section-title, .section-subtitle,
.how-it-works, .features, .waitlist,
.footer, .mobile-menu {
    transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

body {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

/* Ensure non-hero sections sit above fixed hero canvas and starfield */
.section:not(.hero) {
    z-index: 3;
    background: var(--bg-primary);
}

/* ==========================================================================
   Cosmic Background
   ========================================================================== */
#cosmic-background-container {
    position: fixed;
    inset: 0;
    z-index: -10;
    background: var(--color-bg);
}

/* ==========================================================================
   Welcome Screen
   ========================================================================== */
.welcome-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    cursor: pointer;
    background: transparent;
    transition: opacity 0.6s ease, background 0.6s ease;
}

.welcome-screen.is-transitioning {
    background: transparent;
}

/* Light theme welcome screen styling - desktop only */
@media (min-width: 769px) {
    [data-theme="light"] .welcome-screen:not(.is-transitioning) {
        background: rgba(243, 245, 255, 0.92);
    }

    [data-theme="light"] .welcome-logo {
        filter: grayscale(80%) brightness(0.5) blur(1.2px) drop-shadow(0 0 15px rgba(100, 100, 140, 0.3));
    }
}

/* Light theme welcome screen text - desktop only */
@media (min-width: 769px) {
    [data-theme="light"] .welcome-title {
        background: linear-gradient(to right, 
            rgba(80, 80, 100, 0.3), 
            rgba(80, 80, 100, 0.5), 
            rgba(80, 80, 100, 0.3)
        );
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        text-shadow:
            0 0 18px rgba(100, 100, 120, 0.05),
            0 -3.5px 18px rgba(100, 100, 120, 0.0475),
            0 7px 18px rgba(100, 100, 120, 0.045),
            0 -10.5px 18px rgba(100, 100, 120, 0.0425),
            0 14px 18px rgba(100, 100, 120, 0.04),
            0 -17.5px 18px rgba(100, 100, 120, 0.0375),
            0 21px 18px rgba(100, 100, 120, 0.035),
            0 -24.5px 18px rgba(100, 100, 120, 0.0325),
            0 28px 18px rgba(100, 100, 120, 0.03),
            0 -31.5px 18px rgba(100, 100, 120, 0.0275),
            0 35px 18px rgba(100, 100, 120, 0.025),
            0 -38.5px 18px rgba(100, 100, 120, 0.0225),
            0 0 25px rgba(100, 100, 140, 0.2);
    }

    [data-theme="light"] .welcome-text {
        color: rgba(80, 80, 100, 0.45);
        text-shadow:
            0 0 9px rgba(100, 100, 120, 0.035),
            0 -3px 9px rgba(100, 100, 120, 0.035),
            0 6px 9px rgba(100, 100, 120, 0.035),
            0 -9px 9px rgba(100, 100, 120, 0.035),
            0 12px 9px rgba(100, 100, 120, 0.035),
            0 0 15px rgba(100, 100, 140, 0.12);
    }

    [data-theme="light"] .welcome-hint {
        color: rgba(80, 80, 100, 0.3);
        text-shadow:
            0 -2px 6px rgba(100, 100, 120, 0.02),
            0 2px 6px rgba(100, 100, 120, 0.02),
            0 0 10px rgba(100, 100, 140, 0.06);
    }

    [data-theme="light"] .pulse-ring {
        border-color: rgba(100, 100, 140, 0.2);
    }

    [data-theme="light"] .welcome-logo-glow {
        background: radial-gradient(circle, rgba(100, 100, 140, 0.15) 0%, transparent 70%);
    }
}

/* Mobile: always dark theme for welcome screen */
@media (max-width: 768px) {
    .welcome-screen {
        background: rgba(0, 0, 0, 0.98) !important;
    }
    
    .welcome-logo {
        filter: grayscale(100%) brightness(0.9) drop-shadow(0 0 15px rgba(200, 200, 255, 0.2));
        opacity: 0.85;
    }
}

.welcome-content {
    text-align: center;
    position: relative;
    transition: all 0.5s ease;
}

.welcome-logo-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(100, 100, 120, 0.25) 0%, transparent 70%);
    filter: blur(80px);
    animation: pulseGlow 4s ease-in-out infinite;
}

.welcome-logo {
    width: 140px;
    margin: 0 auto 32px;
    position: relative;
    animation: floatLogo 4s ease-in-out infinite;
    filter: grayscale(100%) brightness(0.6) blur(1.5px) drop-shadow(0 0 20px rgba(180, 180, 200, 0.35));
    opacity: 0.7;
}

@keyframes floatLogo {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

/* Welcome text canvas - using Canvas API for exact blur effect */
.welcome-text-canvas {
    display: block;
    margin: 0 auto 40px;
    max-width: 100%;
    height: auto;
}

.welcome-hint-wrapper {
    position: relative;
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border: 1px solid rgba(160, 160, 180, 0.25);
    border-radius: 50%;
    animation: pulseRing 2s ease-out infinite;
}

@keyframes pulseRing {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(1.5); opacity: 0; }
}

.welcome-hint {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 11px;
    font-weight: 300;
    color: rgba(160, 160, 180, 0.35);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    
    /* Subtle blur effect */
    text-shadow:
        0 -2px 6px rgba(200, 200, 220, 0.025),
        0 2px 6px rgba(200, 200, 220, 0.025),
        0 0 12px rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Main Content
   ========================================================================== */
.main-content {
    opacity: 0;
    visibility: hidden;
    transition: all 0.8s ease;
}

.main-content.visible {
    opacity: 1;
    visibility: visible;
}

/* Temporary bypass: skip welcome screen, show content immediately */
body.skip-welcome .welcome-screen {
    display: none !important;
}
body.skip-welcome .main-content {
    opacity: 1 !important;
    visibility: visible !important;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    background: transparent;
    border-bottom: none;
}

.header::before {
    content: '';
    position: absolute;
    inset: 0 0 -40px 0;
    background: linear-gradient(180deg, rgba(12, 10, 24, 0.9) 0%, rgba(12, 10, 24, 0) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
    mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: -1;
    pointer-events: none;
}

.header.scrolled {
    background: transparent;
    border-bottom: none;
    box-shadow: none;
}

.header.scrolled::before {
    opacity: 1;
}

[data-theme="light"] .header::before {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 100%);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 36px;
    width: auto;
}

.logo-dark { display: block; }
.logo-light { display: none; }
[data-theme="light"] .logo-dark { display: none; }
[data-theme="light"] .logo-light { display: block; }

.logo-text {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    background: var(--gradient-text);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-primary-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Language & Theme Toggles */
.lang-toggle,
.theme-toggle {
    display: flex !important;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border-radius: 10px;
    transition: all var(--transition-fast);
    background: transparent;
    border: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    opacity: 0.9;
}

.lang-toggle:hover,
.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text);
    opacity: 1;
    box-shadow: none;
}

[data-theme="light"] .lang-toggle:hover,
[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

.lang-flag {
    padding: 0;
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    border: none;
    border-radius: 0;
    transition: all var(--transition-fast);
    color: inherit;
}

.lang-toggle:hover .lang-flag {
    color: var(--color-primary);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    padding: 4px 0;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

@media (max-width: 900px) {
    .nav-links { display: none; }
}

@media (max-width: 768px) {
    .nav-actions .btn { display: none; }
    .mobile-menu-toggle { display: flex; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 14px;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal);
    position: relative;
    overflow: hidden;
    isolation: isolate;
    transform: translateZ(0);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -120%;
    width: 120%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    transition: left 0.7s ease;
    z-index: 0;
    opacity: 0.9;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(139, 92, 246, 0.22), rgba(255, 255, 255, 0.08));
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 0;
    mix-blend-mode: overlay;
    pointer-events: none;
}

.btn > * {
    position: relative;
    z-index: 1;
}

.btn svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.btn:hover svg {
    transform: translateX(3px);
}

.btn-primary {
    background: rgba(139, 92, 246, 0.15);
    color: var(--color-text);
    border: 1px solid rgba(139, 92, 246, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.btn-primary:hover {
    background: rgba(139, 92, 246, 0.25);
    border-color: rgba(139, 92, 246, 0.55);
    transform: translateY(-1px);
}

.btn-primary:hover::before {
    left: 120%;
}

.btn-primary:hover::after {
    opacity: 0.5;
}

.btn-primary:active {
    transform: translateY(0);
    background: rgba(139, 92, 246, 0.3);
}

[data-theme="light"] .btn-primary {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
}

[data-theme="light"] .btn-primary:hover {
    background: rgba(139, 92, 246, 0.18);
    border-color: rgba(139, 92, 246, 0.45);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .btn-glass {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.1);
}

.btn-glass:hover {
    border-color: rgba(139, 92, 246, 0.4);
    background: rgba(139, 92, 246, 0.08);
    transform: translateY(-1px);
}

.btn-glass:hover::before {
    left: 120%;
}

.btn-glass:hover::after {
    opacity: 0.4;
}

.btn-glass:active {
    transform: translateY(0);
}

.btn-large {
    padding: 16px 32px;
    font-size: 15px;
    border-radius: 14px;
}

.btn-full {
    width: 100%;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-glow:hover::before {
    left: 100%;
}

/* ==========================================================================
   Typography
   ========================================================================== */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 100px;
    padding-bottom: 40px;
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 5;
    max-width: 600px;
}

@media (min-width: 1000px) {
    .hero-content {
        margin-left: 0;
        max-width: 48%;
        padding-right: 40px;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    margin-bottom: 24px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-badge svg {
    width: 14px;
    height: 14px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 24px;
    color: var(--color-text);
    background: var(--gradient-text);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: heroTitleGradient 10s ease-in-out infinite;
}

@keyframes heroTitleGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 36px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.hero-feature svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

.hero-cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Hero - Gargantua Background (Full Right Side) */
.gargantua-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gargantua-bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 82% 40%;
    --garg-scale: 1.14;
    --garg-scale-max: 1.17;
    --garg-ty: 0%;
    --garg-ty-max: -1.2%;
    transform: scale(var(--garg-scale)) translateY(var(--garg-ty));
    opacity: 0.92;
    filter: contrast(1.05) saturate(0.95);
    animation: floatGarg 26s ease-in-out infinite;
    will-change: transform;
    -webkit-mask-image: radial-gradient(ellipse 140% 125% at 78% 42%, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 58%, rgba(255,255,255,0) 84%);
    mask-image: radial-gradient(ellipse 140% 125% at 78% 42%, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 58%, rgba(255,255,255,0) 84%);
}

@keyframes floatGarg {
    0%, 100% { transform: scale(var(--garg-scale)) translateY(var(--garg-ty)); }
    50% { transform: scale(var(--garg-scale-max)) translateY(var(--garg-ty-max)); }
}

/* Multi-layer fade for seamless blend */
.gargantua-fade {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
}

/* Left fade - blend into content */
.gargantua-fade::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 62%;
    height: 100%;
    background: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.75) 0%,
        rgba(0, 0, 0, 0.55) 35%,
        rgba(0, 0, 0, 0.25) 58%,
        transparent 100%
    );
}

/* Top fade - blend top edge */
.gargantua-fade::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 34%;
    background: linear-gradient(180deg, 
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.35) 55%,
        transparent 100%
    );
}

/* Bottom fade overlay */
.gargantua-bottom-fade {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 52%;
    background: linear-gradient(0deg, 
        rgba(0, 0, 0, 0.85) 0%,
        rgba(0, 0, 0, 0.45) 45%,
        rgba(0, 0, 0, 0.20) 70%,
        transparent 100%
    );
    z-index: 3;
}

[data-theme="light"] .gargantua-fade::before {
    background: linear-gradient(90deg, 
        rgba(250, 250, 255, 0.88) 0%,
        rgba(250, 250, 255, 0.68) 38%,
        rgba(250, 250, 255, 0.30) 62%,
        transparent 100%
    );
}

[data-theme="light"] .gargantua-fade::after {
    background: linear-gradient(180deg, 
        rgba(250, 250, 255, 0.85) 0%,
        rgba(250, 250, 255, 0.35) 55%,
        transparent 100%
    );
}

[data-theme="light"] .gargantua-bottom-fade {
    background: linear-gradient(0deg, 
        rgba(250, 250, 255, 0.88) 0%,
        rgba(250, 250, 255, 0.45) 45%,
        rgba(250, 250, 255, 0.22) 70%,
        transparent 100%
    );
}

[data-theme="light"] .gargantua-bg-img {
    filter: brightness(1.06) contrast(1.08) saturate(0.85);
    opacity: 0.75;
    -webkit-mask-image: radial-gradient(ellipse 150% 135% at 78% 42%, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 55%, rgba(255,255,255,0) 82%);
    mask-image: radial-gradient(ellipse 150% 135% at 78% 42%, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 55%, rgba(255,255,255,0) 82%);
}

@media (max-width: 1200px) {
    .gargantua-bg-img {
        object-position: 86% 40%;
        --garg-scale: 1.18;
        --garg-scale-max: 1.22;
    }
}

@media (max-width: 900px) {
    .gargantua-bg {
        opacity: 0.5;
    }
}

@media (max-width: 600px) {
    .gargantua-bg {
        display: none;
    }
}

/* Hero Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s ease-in-out infinite;
}

.hero-scroll-indicator svg {
    width: 20px;
    height: 20px;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@media (max-width: 1000px) {
    .hero-content {
        max-width: 100%;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .hero {
        padding-top: 80px;
    }
    
    .blackhole-container {
        max-width: 320px;
    }
    
    .hero-scroll-indicator {
        display: none;
    }
}

/* ==========================================================================
   Demo Section
   ========================================================================== */
.demo-showcase {
    max-width: 900px;
    margin: 0 auto;
}

[data-theme="dark"] .demo [data-theme-set="light"] {
    display: none !important;
}

[data-theme="light"] .demo [data-theme-set="dark"] {
    display: none !important;
}

.demo-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.demo-tab {
    position: relative;
    overflow: hidden;
    padding: 12px 22px;
    font-size: 13px;
    font-weight: 650;
    letter-spacing: 0.01em;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.demo-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -120%;
    width: 120%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
    transition: left 0.7s ease;
    opacity: 0.7;
}

.demo-tab:hover {
    color: var(--color-text);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}

.demo-tab:hover::before {
    left: 120%;
}

.demo-tab.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.22),
        0 0 0 1px rgba(255, 255, 255, 0.12) inset,
        0 0 40px rgba(139, 92, 246, 0.18);
}

.demo-panel {
    display: none;
}

.demo-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    align-items: start;
}

.demo-grid--news {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.demo-item {
    margin: 0;
}

.demo-item-caption {
    display: none;
}

.demo-missing {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 34px 22px;
    min-height: 340px;
    background:
        radial-gradient(120% 120% at 50% 0%, rgba(139, 92, 246, 0.12) 0%, transparent 55%),
        rgba(255, 255, 255, 0.02);
    color: var(--color-text-secondary);
    text-align: center;
}

[data-theme="light"] .demo-missing {
    background:
        radial-gradient(120% 120% at 50% 0%, rgba(139, 92, 246, 0.10) 0%, transparent 55%),
        rgba(255, 255, 255, 0.72);
    color: rgba(15, 15, 25, 0.78);
}

.demo-missing-inner {
    max-width: 420px;
}

.demo-missing-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 650;
    margin-bottom: 8px;
    color: var(--color-text);
}

[data-theme="light"] .demo-missing-title {
    color: rgba(15, 15, 25, 0.92);
}

.demo-missing-sub {
    font-size: 13px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

[data-theme="light"] .demo-missing-sub {
    color: rgba(15, 15, 25, 0.72);
}

@media (max-width: 700px) {
    .demo-missing {
        min-height: 240px;
        padding: 26px 18px;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.demo-frame {
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25);
}

.frame-header {
    display: flex;
    gap: 8px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .frame-header {
    background: rgba(0, 0, 0, 0.06);
}

.frame-header span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.frame-header span:nth-child(1) { background: #ff5f56; }
.frame-header span:nth-child(2) { background: #ffbd2e; }
.frame-header span:nth-child(3) { background: #27ca40; }

.demo-frame img {
    width: 100%;
    display: block;
    cursor: zoom-in;
}

/* Demo Lightbox */
.demo-lightbox {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.demo-lightbox.open {
    opacity: 1;
    pointer-events: auto;
}

.demo-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

[data-theme="light"] .demo-lightbox-backdrop {
    background: rgba(250, 250, 255, 0.7);
}

.demo-lightbox-shell {
    position: relative;
    width: min(1100px, 92vw);
    max-height: 90vh;
    padding: 16px 16px 12px;
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.45);
    overflow: hidden;
}

.demo-lightbox-stage {
    position: relative;
    width: 100%;
    max-height: calc(90vh - 110px);
    overflow: hidden;
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .demo-lightbox-stage {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.08);
}

.demo-lightbox-stage img {
    width: 100%;
    height: auto;
    max-height: calc(90vh - 110px);
    object-fit: contain;
    display: block;
    cursor: zoom-in;
    user-select: none;
}

.demo-lightbox.zoomed .demo-lightbox-stage {
    overflow: auto;
}

.demo-lightbox.zoomed .demo-lightbox-stage img {
    width: auto;
    max-width: none;
    max-height: none;
    cursor: zoom-out;
}

.demo-lightbox-caption {
    margin-top: 10px;
    padding: 6px 4px 0;
    font-size: 13px;
    color: var(--color-text-secondary);
    text-align: center;
}

.demo-lightbox-close,
.demo-lightbox-nav {
    position: fixed;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #fff;
    background: rgba(20, 20, 30, 0.85);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.2s ease;
    z-index: 1100;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.demo-lightbox-close:hover,
.demo-lightbox-nav:hover {
    background: rgba(139, 92, 246, 0.85);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.4);
}

.demo-lightbox-close:active,
.demo-lightbox-nav:active {
    transform: scale(0.95);
}

.demo-lightbox-close {
    top: 24px;
    right: 24px;
}

.demo-lightbox-nav {
    top: 50%;
    transform: translateY(-50%);
}

.demo-lightbox-nav:hover {
    transform: translateY(-50%) scale(1.1);
}

.demo-lightbox-nav:active {
    transform: translateY(-50%) scale(0.95);
}

.demo-lightbox-nav.prev {
    left: 24px;
}

.demo-lightbox-nav.next {
    right: 24px;
}

.demo-lightbox-close svg,
.demo-lightbox-nav svg {
    width: 26px;
    height: 26px;
    stroke-width: 2.5;
}

@media (max-width: 640px) {
    .demo-lightbox-shell {
        width: 94vw;
        padding: 14px 14px 10px;
    }
    
    .demo-lightbox-close,
    .demo-lightbox-nav {
        width: 48px;
        height: 48px;
    }
    
    .demo-lightbox-close {
        top: 12px;
        right: 12px;
    }
    
    .demo-lightbox-nav.prev {
        left: 12px;
    }
    
    .demo-lightbox-nav.next {
        right: 12px;
    }
    
    .demo-lightbox-close svg,
    .demo-lightbox-nav svg {
        width: 20px;
        height: 20px;
    }
}

.demo-caption {
    text-align: center;
    margin-top: 24px;
    color: var(--color-text-secondary);
    font-size: 15px;
}

/* ==========================================================================
   How It Works - Interactive Brain Visualization
   ========================================================================== */

/* Brain Container - Central Visualization */
.brain-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    margin: 0 auto 60px;
}

/* AI Core - Center */
.ai-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    z-index: 10;
}

.core-center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 60px rgba(139, 92, 246, 0.4);
}

.core-center svg {
    width: 36px;
    height: 36px;
    color: white;
    margin-bottom: 4px;
}

.core-center span {
    font-size: 11px;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.core-ring {
    position: absolute;
    inset: -15px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: coreRingPulse 3s ease-out infinite;
}

.core-ring-2 {
    inset: -30px;
    animation-delay: 1.5s;
}

@keyframes coreRingPulse {
    0% { transform: scale(0.8); opacity: 0.5; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* Orbit Ring */
.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px dashed var(--color-border);
    border-radius: 50%;
    animation: orbitRotate 60s linear infinite;
}

.orbit-ring-1 {
    width: 85%;
    height: 85%;
}

@keyframes orbitRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Orbit Items */
.orbit-item {
    position: absolute;
    width: 56px;
    height: 56px;
    top: 50%;
    left: 50%;
    margin: -28px;
    transform: rotate(var(--angle)) translateX(calc(42.5% * 4.2)) rotate(calc(-1 * var(--angle)));
    animation: orbitItemCounter 60s linear infinite;
}

@keyframes orbitItemCounter {
    from { transform: rotate(var(--angle)) translateX(calc(42.5% * 4.2)) rotate(calc(-1 * var(--angle) + 0deg)); }
    to { transform: rotate(var(--angle)) translateX(calc(42.5% * 4.2)) rotate(calc(-1 * var(--angle) - 360deg)); }
}

.orbit-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all var(--transition-fast);
}

.orbit-item:hover::before {
    border-color: var(--color-primary);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.3);
}

.orbit-item svg {
    position: relative;
    z-index: 2;
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.orbit-item::after {
    content: attr(data-label);
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 600;
    color: var(--color-text-muted);
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.orbit-item:hover::after {
    opacity: 1;
}

/* Data Particles */
.data-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.data-particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFlow 4s ease-in-out infinite;
}

.data-particles span:nth-child(1) { top: 10%; left: 20%; animation-delay: 0s; }
.data-particles span:nth-child(2) { top: 15%; right: 25%; animation-delay: 0.4s; }
.data-particles span:nth-child(3) { top: 30%; left: 10%; animation-delay: 0.8s; }
.data-particles span:nth-child(4) { bottom: 25%; right: 15%; animation-delay: 1.2s; }
.data-particles span:nth-child(5) { bottom: 10%; left: 30%; animation-delay: 1.6s; }
.data-particles span:nth-child(6) { top: 50%; left: 5%; animation-delay: 2s; }
.data-particles span:nth-child(7) { top: 40%; right: 8%; animation-delay: 2.4s; }
.data-particles span:nth-child(8) { bottom: 35%; left: 15%; animation-delay: 2.8s; }
.data-particles span:nth-child(9) { bottom: 20%; right: 30%; animation-delay: 3.2s; }
.data-particles span:nth-child(10) { top: 20%; left: 40%; animation-delay: 3.6s; }

@keyframes particleFlow {
    0% { opacity: 0; transform: scale(0) translateY(0); }
    20% { opacity: 1; transform: scale(1); }
    80% { opacity: 1; }
    100% { opacity: 0; transform: scale(0) translateY(-30px); }
}

/* Analysis Modes Section */
.modes-section {
    margin-top: 20px;
}

.modes-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
    color: var(--color-text);
}

.modes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}

.mode-card {
    position: relative;
    padding: 28px 24px;
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.mode-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-6px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.mode-card:hover::before {
    opacity: 1;
}

.mode-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: 14px;
    margin-bottom: 18px;
    transition: all var(--transition-normal);
}

.mode-card:hover .mode-icon {
    background: var(--gradient-primary);
}

.mode-icon svg {
    width: 26px;
    height: 26px;
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.mode-card:hover .mode-icon svg {
    color: white;
}

.mode-content h4 {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
}

.mode-content p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.mode-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-radius: 6px;
}

/* How Stats */
.how-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    margin-top: 50px;
    padding: 28px 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.how-stat {
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-num {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-text {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--color-border);
}

/* Responsive How It Works */
@media (max-width: 1000px) {
    .modes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 700px) {
    .brain-container {
        max-width: 350px;
    }
    
    .ai-core {
        width: 90px;
        height: 90px;
    }
    
    .core-center svg {
        width: 28px;
        height: 28px;
    }
    
    .orbit-item {
        width: 44px;
        height: 44px;
        margin: -22px;
    }
    
    .orbit-item svg {
        width: 20px;
        height: 20px;
    }
    
    .modes-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .mode-card {
        padding: 24px 20px;
    }
    
    .how-stats {
        flex-wrap: wrap;
        gap: 20px;
        padding: 24px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .how-stat {
        flex: 1 1 40%;
        justify-content: center;
    }
}

/* ==========================================================================
   How It Works - Interactive Engine Map
   ========================================================================== */
.how-it-works .container {
    max-width: 1400px;
}

.engine {
    margin-top: 36px;
}

.engine-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    padding: 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.mode-chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid transparent;
    color: var(--color-text-secondary);
    background: transparent;
    transition: all var(--transition-fast);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.mode-chip svg {
    width: 18px;
    height: 18px;
    color: currentColor;
    opacity: 0.95;
}

.mode-chip:hover {
    color: var(--color-text);
    background: var(--color-primary-light);
    border-color: rgba(159, 122, 234, 0.28);
}

.mode-chip:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.mode-chip.active {
    color: white;
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: 0 14px 40px rgba(159, 122, 234, 0.22);
}

[data-theme="light"] .mode-chip.active {
    box-shadow: 0 18px 50px rgba(107, 70, 193, 0.14);
}

.engine-body {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 24px;
    margin-top: 22px;
    align-items: start;
}

/* Engine Map SVG Styles */
.engine-map {
    position: relative;
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 20px;
    overflow: hidden;
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
}

.engine-map::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 15% 30%, rgba(159, 122, 234, 0.12), transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(128, 90, 213, 0.08), transparent 45%);
    pointer-events: none;
}

.engine-svg {
    position: relative;
    z-index: 1;
    width: 100%;
    height: auto;
    display: block;
}

/* Paths */
.engine-path {
    fill: none;
    stroke: rgba(159, 122, 234, 0.15);
    stroke-width: 1.5;
    transition: all 0.4s ease;
}

.engine-path.always-on {
    stroke: rgba(159, 122, 234, 0.35);
    stroke-dasharray: 4 4;
    animation: pathFlow 20s linear infinite;
}

@keyframes pathFlow {
    to { stroke-dashoffset: -100; }
}

.engine-path.is-active {
    stroke: var(--color-primary);
    stroke-width: 2.5;
    stroke-dasharray: 8 6;
    animation: activePath 1.5s linear infinite;
    filter: drop-shadow(0 0 6px rgba(159, 122, 234, 0.5));
}

@keyframes activePath {
    to { stroke-dashoffset: -30; }
}

.engine-path.loop-path {
    stroke-dasharray: 3 6;
}

[data-theme="light"] .engine-path {
    stroke: rgba(107, 70, 193, 0.2);
}

[data-theme="light"] .engine-path.always-on {
    stroke: rgba(107, 70, 193, 0.3);
}

/* Engine Map Typography */
.engine-map text {
    fill: var(--color-text);
    font-family: var(--font-primary);
    dominant-baseline: middle;
}

/* Data Layer */
.data-layer rect {
    fill: rgba(15, 15, 25, 0.55);
    stroke: rgba(159, 122, 234, 0.22);
    stroke-width: 1;
}

[data-theme="light"] .data-layer rect {
    fill: rgba(255, 255, 255, 0.78);
    stroke: rgba(107, 70, 193, 0.22);
}

.dl-title {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 800;
    text-anchor: middle;
}

.dl-sub {
    font-size: 10px;
    font-weight: 600;
    text-anchor: middle;
    fill: var(--color-text-secondary);
    opacity: 0.95;
}

.data-pill rect {
    fill: rgba(255, 255, 255, 0.03);
    stroke: rgba(159, 122, 234, 0.18);
    stroke-width: 1;
    animation: dataPillPulse 4.8s ease-in-out infinite;
}

.data-pill text {
    font-size: 9px;
    font-weight: 650;
    text-anchor: middle;
    fill: var(--color-text-secondary);
}

.data-layer .data-pill:nth-of-type(odd) rect {
    animation-delay: 0.6s;
}

.data-layer .data-pill:nth-of-type(3n) rect {
    animation-delay: 1.2s;
}

.data-pill.secret rect {
    stroke: rgba(245, 158, 11, 0.35);
    fill: rgba(245, 158, 11, 0.06);
}

.data-pill.secret text {
    fill: rgba(245, 158, 11, 0.85);
}

@keyframes dataPillPulse {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 1; stroke: rgba(159, 122, 234, 0.36); }
}

/* Core */
.engine-core circle:first-child {
    fill: rgba(159, 122, 234, 0.12);
    stroke: rgba(159, 122, 234, 0.45);
    stroke-width: 2;
}

.engine-core .engine-core-ring {
    fill: none;
    stroke: rgba(159, 122, 234, 0.25);
    stroke-width: 2;
    stroke-dasharray: 8 12;
    animation: coreRing 20s linear infinite;
}

@keyframes coreRing {
    to { stroke-dashoffset: -200; }
}

.engine-core .core-title {
    fill: var(--color-text);
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    text-anchor: middle;
}

.engine-core .core-sub {
    fill: var(--color-text-secondary);
    font-family: var(--font-primary);
    font-size: 11px;
    font-weight: 500;
    text-anchor: middle;
}

/* Base workflow steps */
.engine-step {
    opacity: 0.72;
    transition: opacity 0.25s ease;
}

.engine-step rect {
    fill: rgba(15, 15, 25, 0.52);
    stroke: rgba(255, 255, 255, 0.10);
    stroke-width: 1;
    transition: all 0.25s ease;
}

[data-theme="light"] .engine-step rect {
    fill: rgba(255, 255, 255, 0.72);
    stroke: rgba(0, 0, 0, 0.10);
}

.step-badge {
    fill: rgba(159, 122, 234, 0.18);
    stroke: rgba(159, 122, 234, 0.35);
    stroke-width: 1;
}

.step-badge-text {
    font-size: 10px;
    font-weight: 800;
    text-anchor: middle;
    fill: var(--color-text);
}

.step-label {
    font-size: 11px;
    font-weight: 650;
    text-anchor: start;
    fill: var(--color-text);
}

.engine-step.is-active {
    opacity: 1;
}

.engine-step.is-active rect {
    stroke: rgba(159, 122, 234, 0.55);
    fill: rgba(159, 122, 234, 0.10);
}

.engine-step.is-progress rect {
    stroke: var(--color-primary);
    stroke-width: 1.6;
    filter: drop-shadow(0 0 10px rgba(159, 122, 234, 0.35));
}

.engine-step.is-progress .step-badge {
    fill: rgba(159, 122, 234, 0.35);
    stroke: rgba(159, 122, 234, 0.6);
}

/* Mode add-ons */
.engine-addon {
    opacity: 0.18;
    transition: opacity 0.25s ease;
}

.engine-addon rect {
    fill: rgba(15, 15, 25, 0.40);
    stroke: rgba(255, 255, 255, 0.10);
    stroke-width: 1;
}

[data-theme="light"] .engine-addon rect {
    fill: rgba(255, 255, 255, 0.68);
    stroke: rgba(0, 0, 0, 0.10);
}

.engine-addon.loop rect {
    stroke-dasharray: 4 4;
}

.engine-addon.is-active {
    opacity: 1;
}

.engine-addon.is-active rect {
    stroke: var(--color-primary);
    fill: rgba(159, 122, 234, 0.12);
}

.addon-label {
    font-size: 10px;
    font-weight: 750;
    text-anchor: middle;
    fill: var(--color-text);
}

/* Output */
.engine-output rect {
    fill: rgba(15, 15, 25, 0.50);
    stroke: rgba(159, 122, 234, 0.22);
    stroke-width: 1.2;
}

.engine-output text {
    fill: var(--color-text);
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 600;
    text-anchor: middle;
    dominant-baseline: middle;
}

.engine-output.is-active rect {
    stroke: var(--color-primary);
    fill: rgba(159, 122, 234, 0.18);
    filter: drop-shadow(0 0 12px rgba(159, 122, 234, 0.5));
}

.engine-output.is-progress rect {
    stroke: var(--color-primary);
    stroke-width: 1.6;
    fill: rgba(159, 122, 234, 0.22);
    filter: drop-shadow(0 0 14px rgba(159, 122, 234, 0.55));
}

.engine-addon.is-progress rect {
    stroke: var(--color-primary);
    fill: rgba(159, 122, 234, 0.16);
    filter: drop-shadow(0 0 12px rgba(159, 122, 234, 0.45));
}

/* Personalization block */
.engine-personalization rect {
    fill: rgba(159, 122, 234, 0.10);
    stroke: rgba(159, 122, 234, 0.32);
    stroke-width: 1.2;
}

[data-theme="light"] .engine-personalization rect {
    fill: rgba(107, 70, 193, 0.06);
    stroke: rgba(107, 70, 193, 0.22);
}

.engine-personalization text {
    font-size: 11px;
    font-weight: 700;
    text-anchor: middle;
    fill: var(--color-text-secondary);
}

/* Engine info: outputs + bullets */
.mode-outputs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0 14px;
}

.output-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text-secondary);
    font-size: 12px;
    font-weight: 650;
}

[data-theme="light"] .output-tag {
    background: rgba(0, 0, 0, 0.02);
}

.output-tag.is-primary {
    border-color: rgba(159, 122, 234, 0.32);
    background: rgba(159, 122, 234, 0.10);
    color: var(--color-text);
}

.mode-list {
    margin: 0;
    padding-left: 18px;
    display: grid;
    gap: 10px;
    color: var(--color-text-secondary);
    font-size: 13px;
    line-height: 1.55;
}

.mode-list li::marker {
    color: rgba(159, 122, 234, 0.8);
}

/* Sources note */
.sources-note {
    position: absolute;
    bottom: 12px;
    left: 20px;
    font-size: 11px;
    color: var(--color-text-muted);
    font-style: italic;
}


@media (max-width: 900px) {
    .engine-body {
        grid-template-columns: 1fr;
    }
    
    .engine-map {
        min-height: 380px;
    }
}

@media (max-width: 600px) {
    .engine-svg {
        transform: scale(0.85);
        transform-origin: center top;
    }
}

.engine-info {
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 20px;
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
}

.info-kicker {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.mode-detail {
    display: none;
    animation: engineFade 0.45s ease;
}

.mode-detail.active {
    display: block;
}

@keyframes engineFade {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.engine-info h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 650;
    margin-bottom: 8px;
}

.engine-info p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

@media (min-width: 1200px) {
    .engine-tabs {
        padding: 16px;
        gap: 12px;
    }

    .mode-chip {
        padding: 11px 16px;
        font-size: 14px;
    }

    .engine-body {
        grid-template-columns: 1.35fr 0.65fr;
        gap: 30px;
    }

    .engine-map,
    .engine-info {
        padding: 26px;
        border-radius: 22px;
    }

    .engine-info h3 {
        font-size: 22px;
    }

    .engine-info p {
        font-size: 14px;
        line-height: 1.7;
    }

    .output-tag {
        font-size: 13px;
        padding: 7px 12px;
    }

    .mode-list {
        font-size: 14px;
    }
}

.data-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0 14px;
}

.data-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 650;
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.data-pill:hover {
    transform: translateY(-1px);
    border-color: rgba(139, 92, 246, 0.35);
    background: rgba(139, 92, 246, 0.10);
}

[data-theme="light"] .data-pill {
    color: rgba(15, 15, 25, 0.92);
    background: rgba(255, 255, 255, 0.72);
    border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .data-pill:hover {
    border-color: rgba(139, 92, 246, 0.28);
    background: rgba(139, 92, 246, 0.10);
}

.info-list {
    list-style: none;
    display: grid;
    gap: 10px;
}

.info-list li {
    position: relative;
    padding-left: 18px;
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.info-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
    opacity: 0.85;
}

/* Workflow Steps */
.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
}

.workflow-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    transition: all 0.2s ease;
}

[data-theme="light"] .workflow-step {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.06);
}

.workflow-step:hover {
    background: rgba(139, 92, 246, 0.08);
    border-color: rgba(139, 92, 246, 0.25);
    transform: translateX(4px);
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    font-size: 12px;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}

.step-num.loop {
    background: rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.4);
    color: #F59E0B;
    animation: loopPulse 2s ease-in-out infinite;
}

@keyframes loopPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.3); }
    50% { box-shadow: 0 0 0 6px rgba(245, 158, 11, 0); }
}

.step-text {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.workflow-step.recursive-loop {
    background: rgba(245, 158, 11, 0.06);
    border-color: rgba(245, 158, 11, 0.2);
}

.recursive-note {
    margin-top: 12px;
    padding: 8px 12px;
    background: rgba(245, 158, 11, 0.08);
    border-left: 3px solid rgba(245, 158, 11, 0.5);
    border-radius: 0 8px 8px 0;
    font-size: 12px;
    color: var(--color-text-muted);
    font-style: italic;
}

.data-pill.secret {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(139, 92, 246, 0.15));
    border-color: rgba(245, 158, 11, 0.3);
    color: #F59E0B;
}

@media (max-width: 1000px) {
    .engine-body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .engine-tabs {
        padding: 12px;
        gap: 8px;
    }
    
    .mode-chip {
        padding: 9px 12px;
        gap: 8px;
        font-size: 12px;
    }
    
    .engine-map {
        padding: 14px 14px 8px;
    }
    
    .engine-info {
        padding: 18px;
    }
}

/* ==========================================================================
   Beta Section - Clean Minimal Design
   ========================================================================== */
.beta {
    padding: 100px 0;
}

.beta-wrapper {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.beta-content {
    position: relative;
    background: var(--gradient-surface);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 48px 40px;
}

[data-theme="light"] .beta-content {
    background: rgba(255, 255, 255, 0.7);
}

.beta-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.5;
}

.beta-header {
    text-align: center;
    margin-bottom: 40px;
}

.beta-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    font-size: 12px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.78);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

[data-theme="light"] .beta-status {
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.beta-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    background: var(--gradient-text);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: heroTitleGradient 12s ease-in-out infinite;
}

.beta-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.74);
    line-height: 1.7;
    max-width: 440px;
    margin: 0 auto;
}

[data-theme="light"] .beta-subtitle {
    color: var(--color-text-secondary);
}

/* Beta Form - Premium Inputs */
.beta-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 36px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.78);
}

[data-theme="light"] .form-label {
    color: var(--color-text-secondary);
}

.form-label svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
    opacity: 0.8;
}

.required-star {
    color: var(--color-primary);
    font-weight: 600;
}

.form-input {
    padding: 16px 20px;
    font-size: 15px;
    font-family: inherit;
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    transition: all var(--transition-normal);
    resize: none;
}

[data-theme="light"] .form-input {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.1);
}

.form-input:hover {
    border-color: rgba(139, 92, 246, 0.3);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

[data-theme="light"] .form-input::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    min-height: 100px;
}

/* Contact Tabs - Premium Style */
.contact-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

.contact-tab {
    cursor: pointer;
}

.contact-tab input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.contact-tab-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 18px 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    transition: all var(--transition-normal);
}

[data-theme="light"] .contact-tab-inner {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}

.contact-tab-inner svg {
    width: 20px;
    height: 20px;
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.contact-tab:hover .contact-tab-inner {
    border-color: rgba(139, 92, 246, 0.4);
    background: rgba(139, 92, 246, 0.05);
}

.contact-tab input:checked + .contact-tab-inner {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(99, 102, 241, 0.1) 100%);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.contact-tab input:checked + .contact-tab-inner svg {
    opacity: 1;
    color: var(--color-primary);
}

/* Submit Button - Premium */
.submit-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 18px 32px;
    font-family: var(--font-primary);
    font-size: 16px;
    font-weight: 800;
    letter-spacing: .03em;
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff !important;
    text-shadow: 0 0 1px #fff, 0 1px 6px rgba(0,0,0,.6);
    background: linear-gradient(135deg, #6d28d9 0%, #5b21b6 50%, #4c1d95 100%);
    border: none;
    border-radius: 16px;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: 0 8px 32px rgba(91, 33, 182, 0.5);
}

.submit-btn .submit-btn-text,
.submit-btn span,
.submit-btn svg {
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
    opacity: 1 !important;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.4);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn-icon svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.submit-btn:hover .submit-btn-icon svg {
    transform: translateX(4px);
}

.submit-btn-loading {
    display: none;
}

.submit-btn-loading svg {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.submit-btn.loading .submit-btn-text,
.submit-btn.loading .submit-btn-icon {
    display: none;
}

.submit-btn.loading .submit-btn-loading {
    display: block;
}

/* Beta Features - Premium */
.beta-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 28px;
}

.beta-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.78);
}

[data-theme="light"] .beta-feature {
    color: var(--color-text-secondary);
}

.beta-feature svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    opacity: 0.8;
}

/* Beta Section Responsive */
@media (max-width: 640px) {
    .beta {
        padding: 80px 0;
    }
    
    .beta-content {
        padding: 40px 24px;
        border-radius: 24px;
    }
    
    .contact-tabs {
        grid-template-columns: 1fr;
    }
    
    .contact-tab-inner {
        flex-direction: row;
        padding: 14px 18px;
    }
    
    .beta-features {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 36px 24px;
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    text-align: center;
    transition: all var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.contact-card:hover .contact-icon {
    background: var(--gradient-primary);
}

.contact-icon svg {
    width: 26px;
    height: 26px;
    color: var(--color-primary);
    transition: color var(--transition-normal);
}

.contact-card:hover .contact-icon svg {
    color: white;
}

.contact-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-value {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 500;
}

@media (max-width: 700px) {
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: 60px 0 30px;
    background: transparent;
    border-top: 1px solid var(--color-border);
    position: relative;
    z-index: 3;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand .logo-img {
    width: auto;
    height: 28px;
    object-fit: contain;
}

.footer-brand span {
    font-family: var(--font-primary);
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 28px;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-copy {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-muted);
}

@media (max-width: 640px) {
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
}

/* ==========================================================================
   Back to Top
   ========================================================================== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 1050;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* ==========================================================================
   Mobile Menu
   ========================================================================== */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: 28px;
    text-align: center;
}

.mobile-menu a {
    font-family: var(--font-primary);
    font-size: 28px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.mobile-menu a:hover {
    color: var(--color-primary);
}

/* ==========================================================================
   Scroll Animations
   ========================================================================== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal[data-delay="1"] { transition-delay: 0.1s; }
.scroll-reveal[data-delay="2"] { transition-delay: 0.2s; }
.scroll-reveal[data-delay="3"] { transition-delay: 0.3s; }
.scroll-reveal[data-delay="4"] { transition-delay: 0.4s; }
.scroll-reveal[data-delay="5"] { transition-delay: 0.5s; }

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 18px 28px;
    background: var(--color-surface-solid);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    font-size: 14px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.toast.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: #10B981;
    color: #10B981;
}

.toast.error {
    border-color: #EF4444;
    color: #EF4444;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Hero Constellation Canvas
   ========================================================================== */
.hero-constellation-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

/* Fixed full-viewport canvas for hero variants 2-4 */
.hero-bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    transition: opacity .4s ease;
}

/* ==========================================================================
   How It Works – Trust Pipeline
   ========================================================================== */

/* Pipeline row */
.hiw-pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 60px;
}

/* Each stage card */
.hiw-stage {
    flex: 0 1 280px;
    text-align: center;
    padding: 36px 24px;
    border-radius: 20px;
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.hiw-stage:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.08);
}

.hiw-stage--core {
    border-color: rgba(139, 92, 246, 0.25);
    background: linear-gradient(145deg, rgba(139, 92, 246, 0.06) 0%, var(--color-surface) 100%);
}

.hiw-stage--core:hover {
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.12);
}

.hiw-stage-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: var(--color-primary-light);
    border: 1px solid rgba(139, 92, 246, 0.15);
    color: var(--color-primary);
    transition: all var(--transition-normal);
}

.hiw-stage:hover .hiw-stage-icon {
    background: rgba(139, 92, 246, 0.18);
    transform: scale(1.08);
}

.hiw-stage-icon svg {
    width: 26px;
    height: 26px;
}

.hiw-stage-icon--core {
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.25);
    animation: coreIconPulse 3s ease-in-out infinite;
}

@keyframes coreIconPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.15); }
    50%      { box-shadow: 0 0 20px 4px rgba(139, 92, 246, 0.2); }
}

.hiw-stage h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.hiw-stage p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Animated connector */
.hiw-connector {
    flex: 0 0 60px;
    display: flex;
    align-items: center;
    padding: 0 4px;
}

.hiw-connector-track {
    width: 100%;
    height: 2px;
    background: var(--color-border);
    border-radius: 1px;
    position: relative;
    overflow: visible;
}

.hiw-connector-particle {
    position: absolute;
    top: 50%;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary-glow), 0 0 3px var(--color-primary);
    animation: hiwFlow 2.2s ease-in-out infinite;
    opacity: 0;
}

.hiw-connector-particle:nth-child(2) { animation-delay: -0.75s; }
.hiw-connector-particle:nth-child(3) { animation-delay: -1.5s; }

@keyframes hiwFlow {
    0%   { left: -8px; opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { left: calc(100% + 8px); opacity: 0; }
}

/* Mobile pipeline → vertical */
@media (max-width: 768px) {
    .hiw-pipeline {
        flex-direction: column;
        gap: 0;
    }
    .hiw-stage { flex: none; width: 100%; max-width: 340px; }
    .hiw-connector {
        flex: 0 0 40px;
        width: 2px;
        padding: 4px 0;
        flex-direction: column;
    }
    .hiw-connector-track {
        width: 2px;
        height: 100%;
    }
    .hiw-connector-particle {
        top: auto;
        left: 50% !important;
        margin-top: 0;
        margin-left: -4px;
        animation: hiwFlowV 2.2s ease-in-out infinite;
    }
    @keyframes hiwFlowV {
        0%   { top: -8px; opacity: 0; }
        10%  { opacity: 1; }
        90%  { opacity: 1; }
        100% { top: calc(100% + 8px); opacity: 0; }
    }
}

/* Data Sources Grid */
.hiw-sources {
    text-align: center;
    margin-bottom: 48px;
}

.hiw-sources-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-text);
}

.hiw-source-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.hiw-source-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all var(--transition-normal);
    cursor: default;
}

.hiw-source-badge:hover {
    border-color: rgba(139, 92, 246, 0.35);
    color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.08);
}

.hiw-source-badge--secret {
    border-color: rgba(245, 158, 11, 0.25);
    color: var(--color-accent-warm);
}

.hiw-source-badge--secret:hover {
    border-color: rgba(245, 158, 11, 0.45);
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.1);
}

.hiw-live-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #22c55e;
    flex-shrink: 0;
    animation: hiwLive 2s ease-in-out infinite;
}

.hiw-source-badge--secret .hiw-live-dot {
    background: var(--color-accent-warm);
}

@keyframes hiwLive {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    50%      { opacity: .55; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0); }
}

/* Trust Indicators */
.hiw-trust {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hiw-trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.hiw-trust-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* Analysis Modes Grid */
.hiw-modes {
    text-align: center;
}

.hiw-modes-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-text);
}

.hiw-mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

@media (max-width: 900px) {
    .hiw-mode-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .hiw-mode-grid { grid-template-columns: 1fr; }
}

.hiw-mode-card {
    text-align: left;
    padding: 24px;
    border-radius: 16px;
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-normal);
}

.hiw-mode-card:hover {
    border-color: rgba(139, 92, 246, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.06);
}

.hiw-mode-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    margin-bottom: 14px;
}

.hiw-mode-icon svg {
    width: 20px;
    height: 20px;
}

.hiw-mode-card h4 {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.hiw-mode-card p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ==========================================================================
   MOBILE DEEP FIX — comprehensive phone adaptation (≤480px)
   ========================================================================== */
@media (max-width: 480px) {
    /* Hero */
    .hero { padding-top: 70px; padding-bottom: 24px; min-height: auto; }
    .hero-badge { font-size: 10px; padding: 5px 10px; margin-bottom: 14px; }
    .hero-title { font-size: 26px !important; margin-bottom: 14px; line-height: 1.15; }
    .hero-description { font-size: 14px; line-height: 1.6; margin-bottom: 18px; max-width: 100%; }
    .hero-features { gap: 8px; margin-bottom: 20px; }
    .hero-feature { font-size: 12px; padding: 6px 10px; gap: 5px; }
    .hero-feature svg { width: 14px; height: 14px; }
    .hero-cta { flex-direction: column; gap: 8px; }
    .hero-cta .btn { width: 100%; padding: 12px 16px; font-size: 13px; }

    /* Section headers */
    .section { padding: 50px 0; }
    .section-header { margin-bottom: 28px; }
    .section-title { font-size: 22px !important; line-height: 1.2; margin-bottom: 10px; }
    .section-description { font-size: 14px; line-height: 1.6; }
    .section-tag { font-size: 10px; padding: 5px 10px; }

    /* Container */
    .container { padding: 0 14px; }

    /* Beta form */
    .beta { padding: 40px 0; }
    .beta-content { padding: 24px 16px; border-radius: 18px; }
    .beta-title { font-size: 22px !important; }
    .beta-description { font-size: 13px; }
    .form-group { margin-bottom: 12px; }
    .form-input { padding: 12px 14px; font-size: 14px; }
    .form-textarea { min-height: 70px; }
    .form-label { font-size: 12px; gap: 5px; margin-bottom: 6px; }
    .submit-btn { padding: 14px 20px; font-size: 14px !important; }

    /* Contact cards */
    .contact-card { padding: 20px 16px; gap: 10px; }
    .contact-icon { width: 42px; height: 42px; border-radius: 12px; }
    .contact-icon svg { width: 20px; height: 20px; }
    .contact-label { font-size: 10px; }
    .contact-value { font-size: 13px; }

    /* Footer */
    .footer { padding: 30px 0 20px; }
    .footer-grid { gap: 24px; }
    .footer-brand .logo-img { height: 22px; }
    .footer-description { font-size: 12px; }

    /* Navigation */
    .nav .container { padding: 0 12px; }
    .header { padding: 10px 0; }

    /* Demo tabs */
    .demo-tabs { gap: 4px; margin-bottom: 16px; }
    .demo-tab { padding: 8px 12px; font-size: 11px; }

    /* Cards & general */
    .gradient-text { font-size: inherit; }
}

/* Tablet fix (≤768px) */
@media (max-width: 768px) {
    .hero-title { font-size: 32px !important; }
    .hero-description { font-size: 15px; }
    .section-title { font-size: 26px !important; }
    .section-description { font-size: 15px; }
    .beta-content { padding: 32px 20px; }
    .submit-btn { font-size: 15px !important; }
}