/* COINjecture Landing Page Styles */
:root {
    /* Color Palette */
    --primary-purple: #6B46C1;
    --primary-purple-dark: #553C9A;
    --primary-purple-light: #9F7AEA;
    --secondary-purple: #805AD5;
    --accent-purple: #B794F4;
    --dark-purple: #2D3748;
    --light-purple: #E9D8FD;
    --white: #FFFFFF;
    --gray-50: #F7FAFC;
    --gray-100: #EDF2F7;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E0;
    --gray-600: #718096;
    --gray-700: #4A5568;
    --gray-800: #2D3748;
    --gray-900: #1A202C;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--gray-600);
}

a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-purple-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--primary-purple);
}

.logo-symbols {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.logo-symbols .infinity {
    font-size: var(--font-size-lg);
    color: var(--primary-purple);
}

.logo-symbols .sigma {
    font-size: var(--font-size-xl);
    color: var(--secondary-purple);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
    align-items: center;
}

.nav-menu a {
    color: var(--gray-700);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.github-link {
    background: var(--primary-purple);
    color: var(--white) !important;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: 6px;
    font-weight: 500;
}

.github-link:hover {
    background: var(--primary-purple-dark);
    color: var(--white) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--light-purple) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
    color: var(--gray-900);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: 8px;
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-purple);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-purple-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-secondary:hover {
    background: var(--primary-purple);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-outline:hover {
    background: var(--primary-purple);
    color: var(--white);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mathematical-animation {
    position: relative;
    width: 100%;
    height: 100%;
}

.symbol-container {
    position: relative;
    width: 300px;
    height: 300px;
}

.floating-symbol {
    position: absolute;
    font-size: 8rem;
    font-weight: 700;
    color: var(--primary-purple);
    opacity: 0.8;
    animation: float 6s ease-in-out infinite;
}

.floating-symbol.infinity-large {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.floating-symbol.sigma-large {
    top: 60%;
    right: 20%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.particle-field {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 30%, var(--accent-purple) 0%, transparent 50%),
                radial-gradient(circle at 70% 70%, var(--light-purple) 0%, transparent 50%);
    opacity: 0.3;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.05); }
}

/* Section Styles */
section {
    padding: var(--spacing-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-header h2 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

.section-header p {
    font-size: var(--font-size-xl);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Vision Section */
.vision {
    background: var(--gray-50);
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
}

.vision-card {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.vision-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
}

.vision-card h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-3);
}

.vision-card p {
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Innovation Section */
.innovation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.math-display {
    background: var(--gray-50);
    padding: var(--spacing-6);
    border-radius: 8px;
    margin: var(--spacing-6) 0;
    border-left: 4px solid var(--primary-purple);
}

.math-formula {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-4);
}

.math-formula:last-child {
    margin-bottom: 0;
}

.math-formula span:first-child {
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-purple);
}

.formula-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-top: var(--spacing-1);
}

.nash-equilibrium-diagram {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
    background: var(--gray-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.equilibrium-point {
    width: 20px;
    height: 20px;
    background: var(--primary-purple);
    border-radius: 50%;
    position: absolute;
    animation: pulse 2s ease-in-out infinite;
}

.convergence-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-purple);
    border-radius: 50%;
    opacity: 0.3;
    animation: rotate 10s linear infinite;
}

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

.mathematical-constants {
    position: absolute;
    display: flex;
    gap: var(--spacing-4);
}

.constant {
    width: 40px;
    height: 40px;
    background: var(--primary-purple);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-lg);
}

/* Technology Section */
.technology {
    background: var(--white);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.tech-card {
    background: var(--gray-50);
    padding: var(--spacing-8);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-normal);
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-purple);
}

.tech-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
}

.tech-card h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-3);
}

.tech-card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-4);
}

.tech-features {
    list-style: none;
    padding: 0;
}

.tech-features li {
    padding: var(--spacing-2) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-4);
}

.tech-features li::before {
    content: "•";
    color: var(--primary-purple);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Research Section */
.research {
    background: var(--gray-50);
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
}

.status-grid {
    display: grid;
    gap: var(--spacing-4);
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: 6px;
    background: var(--white);
    border: 1px solid var(--gray-200);
}

.status-item.completed {
    border-color: #10B981;
    background: #F0FDF4;
}

.status-item.in-progress {
    border-color: #F59E0B;
    background: #FFFBEB;
}

.status-item.planned {
    border-color: var(--gray-300);
    background: var(--white);
}

.status-icon {
    font-size: var(--font-size-lg);
}

.status-text {
    font-weight: 500;
    color: var(--gray-700);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
}

.metric {
    text-align: center;
    padding: var(--spacing-6);
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

.metric-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-purple);
    margin-bottom: var(--spacing-2);
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Community Section */
.community-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.community-card {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    transition: transform var(--transition-normal);
}

.community-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.community-card h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-3);
}

.community-card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-6);
}

.community-card ul {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-6);
}

.community-card li {
    padding: var(--spacing-2) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-4);
}

.community-card li::before {
    content: "→";
    color: var(--primary-purple);
    position: absolute;
    left: 0;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-4);
}

.footer-section p {
    color: var(--gray-300);
    margin-bottom: var(--spacing-4);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-2);
}

.footer-section a {
    color: var(--gray-300);
    transition: color var(--transition-fast);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.footer-logo .logo-text {
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-8);
    text-align: center;
    color: var(--gray-400);
}

.footer-bottom p {
    margin-bottom: var(--spacing-2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .innovation-content {
        grid-template-columns: 1fr;
    }
    
    .research-content {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .floating-symbol {
        font-size: 4rem;
    }
    
    .symbol-container {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .btn {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-base);
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .vision-grid {
        grid-template-columns: 1fr;
    }
    
    .community-cards {
        grid-template-columns: 1fr;
    }
}

/* Smooth scrolling for anchor links */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.btn:focus,
a:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

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

.vision-card,
.tech-card,
.community-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Mathematical symbol animations */
.floating-symbol {
    filter: drop-shadow(0 4px 8px rgba(107, 70, 193, 0.3));
}

/* Gradient backgrounds */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, var(--accent-purple) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, var(--light-purple) 0%, transparent 50%);
    opacity: 0.1;
    pointer-events: none;
}