:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08);
  --color-bg-2: rgba(245, 158, 11, 0.08);
  --color-bg-3: rgba(34, 197, 94, 0.08);
  --color-bg-4: rgba(239, 68, 68, 0.08);
  --color-bg-5: rgba(147, 51, 234, 0.08);
  --color-bg-6: rgba(249, 115, 22, 0.08);
  --color-bg-7: rgba(236, 72, 153, 0.08);
  --color-bg-8: rgba(6, 182, 212, 0.08);

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Custom variables for this page */
  --hero-gradient-start: #0f172a;
  --hero-gradient-end: #1e293b;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-indigo: #6366f1;

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    --color-bg-1: rgba(29, 78, 216, 0.15);
    --color-bg-2: rgba(180, 83, 9, 0.15);
    --color-bg-3: rgba(21, 128, 61, 0.15);
    --color-bg-4: rgba(185, 28, 28, 0.15);
    --color-bg-5: rgba(107, 33, 168, 0.15);
    --color-bg-6: rgba(194, 65, 12, 0.15);
    --color-bg-7: rgba(190, 24, 93, 0.15);
    --color-bg-8: rgba(8, 145, 178, 0.15);

    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-family-base);
}

body {
    font-family: var(--font-family-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--hero-gradient-start) 0%, var(--hero-gradient-end) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--space-32);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* 3D Animation Container */
.animation-container {
    perspective: 1200px;
    margin-bottom: var(--space-32);
    position: relative;
    z-index: 1;
}

.cube-3d {
    width: 280px;
    height: 280px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 20s infinite linear;
}

@keyframes rotateCube {
    0% {
        transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
    }
    100% {
        transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
    }
}

.cube-face {
    position: absolute;
    width: 280px;
    height: 280px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.8), rgba(139, 92, 246, 0.8));
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.face-front {
    transform: translateZ(140px);
}

.face-back {
    transform: rotateY(180deg) translateZ(140px);
}

.face-right {
    transform: rotateY(90deg) translateZ(140px);
}

.face-left {
    transform: rotateY(-90deg) translateZ(140px);
}

.face-top {
    transform: rotateX(90deg) translateZ(140px);
}

.face-bottom {
    transform: rotateX(-90deg) translateZ(140px);
}

/* Floating shapes */
.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    top: 10%;
    left: 10%;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    border-radius: 50%;
    animation-delay: 0s;
}

.shape-2 {
    top: 70%;
    right: 15%;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
    border-radius: var(--radius-lg);
    animation-delay: 2s;
}

.shape-3 {
    bottom: 20%;
    left: 20%;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

/* Hero Text */
.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(48px, 8vw, 96px);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--space-16);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.02em;
}

.hero .tagline {
    font-size: clamp(20px, 3vw, 28px);
    color: rgba(255, 255, 255, 0.9);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-32);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-32);
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.scroll-indicator::after {
    content: '↓';
    display: block;
    font-size: 24px;
    margin-top: var(--space-4);
}

/* Features Section */
.features {
    padding: 80px var(--space-32);
    background: var(--color-background);
}

.features-container {
    max-width: var(--container-lg);
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    font-size: clamp(32px, 5vw, 48px);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-16);
    color: var(--color-text);
}

.features-subtitle {
    text-align: center;
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-24);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    background: var(--color-surface);
    padding: var(--space-32);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--space-16);
    display: block;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-12);
    color: var(--color-text);
}

.feature-card p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Form Section */
.form-section {
    padding: 80px var(--space-32);
    background: var(--color-surface);
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.form-section h2 {
    text-align: center;
    font-size: clamp(32px, 5vw, 48px);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-16);
    color: var(--color-text);
}

.form-intro {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.contact-form {
    background: var(--color-background);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--space-24);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-8);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-12) var(--space-16);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    transition: all var(--duration-fast) var(--ease-standard);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

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

.submit-btn {
    width: 100%;
    padding: var(--space-16) var(--space-32);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-btn-primary-text);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    font-family: var(--font-family-base);
}

.submit-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.submit-btn:active {
    background: var(--color-primary-active);
    transform: translateY(0);
}

.submit-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Success Message */
.success-message {
    display: none;
    background: rgba(var(--color-success-rgb), 0.15);
    color: var(--color-success);
    padding: var(--space-16);
    border-radius: var(--radius-base);
    border: 1px solid rgba(var(--color-success-rgb), 0.3);
    margin-top: var(--space-16);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.success-message.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

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

/* Footer */
.footer {
    background: var(--hero-gradient-start);
    color: rgba(255, 255, 255, 0.8);
    padding: 40px var(--space-32);
    text-align: center;
}

.footer p {
    margin: var(--space-8) 0;
    font-size: var(--font-size-base);
}

.footer a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--duration-fast);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .cube-3d {
        width: 200px;
        height: 200px;
    }
    
    .cube-face {
        width: 200px;
        height: 200px;
        font-size: 32px;
    }
    
    .face-front,
    .face-back {
        transform: translateZ(100px);
    }
    
    .face-back {
        transform: rotateY(180deg) translateZ(100px);
    }
    
    .face-right {
        transform: rotateY(90deg) translateZ(100px);
    }
    
    .face-left {
        transform: rotateY(-90deg) translateZ(100px);
    }
    
    .face-top {
        transform: rotateX(90deg) translateZ(100px);
    }
    
    .face-bottom {
        transform: rotateX(-90deg) translateZ(100px);
    }
    
    .contact-form {
        padding: var(--space-24);
    }
    
    .features,
    .form-section {
        padding: 60px var(--space-16);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--space-16);
    }
    
    .cube-3d {
        width: 160px;
        height: 160px;
    }
    
    .cube-face {
        width: 160px;
        height: 160px;
        font-size: 24px;
    }
    
    .face-front {
        transform: translateZ(80px);
    }
    
    .face-back {
        transform: rotateY(180deg) translateZ(80px);
    }
    
    .face-right {
        transform: rotateY(90deg) translateZ(80px);
    }
    
    .face-left {
        transform: rotateY(-90deg) translateZ(80px);
    }
    
    .face-top {
        transform: rotateX(90deg) translateZ(80px);
    }
    
    .face-bottom {
        transform: rotateX(-90deg) translateZ(80px);
    }
}