/* CSS Variables for Dark Theme */
:root {
    /* Color Palette */
    --primary-blue: #1e40af;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --secondary-white: #ffffff;

    /* Background Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-accent: #334155;

    /* Text Colors */
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-white) 100%);
    --gradient-card: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));

    /* Shadows */
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.3);
    --shadow-heavy: rgba(0, 0, 0, 0.4);
    --shadow-glow: rgba(30, 64, 175, 0.3);

    /* Transparency & Glassmorphism */
    --glass-bg-light: rgba(255, 255, 255, 0.1);
    --glass-bg-medium: rgba(255, 255, 255, 0.3);
    --glass-border: rgba(255, 255, 255, 0.2);
    --overlay-dark: rgba(15, 23, 42, 0.65);
    --overlay-strong: rgba(15, 23, 42, 0.7);
    --glass-card-bg: rgba(30, 41, 59, 0.8);
    --focus-primary: #258cfb;
    --glass-text: var(--text-primary);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 50px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    font-size: 14px;
    position: relative;
    min-height: 100%;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Focus States */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem var(--focus-primary);
}

/* Fullscreen Image Styles */
.fullscreen-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    z-index: -1;
}

.fullscreen-image img {
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
}

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

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    color: var(--text-dark);
    padding: calc(var(--spacing-xxl) * 2) 0 calc(var(--spacing-xxl) * 1.5);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="80" fill="url(%23a)"/><circle cx="600" cy="800" r="120" fill="url(%23a)"/></svg>') no-repeat center;
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-dark);
    backdrop-filter: blur(20px);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--glass-bg-medium);
    color: var(--glass-text);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

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

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--glass-text);
    text-shadow: 0 2px 4px var(--shadow-light);
}

.hero .subtitle {
    font-size: 1.3rem;
    font-weight: 300;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
    color: var(--glass-text);
    text-shadow: 0 1px 2px var(--shadow-light);
}

/* Section Styling */
.section {
    padding: calc(var(--spacing-xl) * 1.666) 0;
    position: relative;
    background-color: var(--bg-primary);
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-xl) * 1.333);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: calc(var(--spacing-xl) * 1.333);
}

.content-card {
    background: var(--bg-secondary);
    padding: calc(var(--spacing-xl) * 0.833);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px var(--shadow-medium);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--bg-accent);
    backdrop-filter: blur(10px);
    background: var(--glass-card-bg);
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--shadow-heavy);
}

.content-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.content-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Stats Section */
.stats {
    background: var(--gradient-primary);
    color: var(--text-primary);
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.timeline-item {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 5px 15px var(--shadow-medium);
    border-left: 4px solid var(--primary-blue);
    transition: transform var(--transition-normal);
    backdrop-filter: blur(10px);
    background: var(--glass-card-bg);
}

.timeline-item:hover {
    transform: translateX(8px);
}

.timeline-item h3 {
    color: var(--primary-blue-light);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Values Grid */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-card {
    text-align: center;
    padding: calc(var(--spacing-xl) * 0.833) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow-medium);
    transition: all var(--transition-normal);
    border: 1px solid var(--bg-accent);
    backdrop-filter: blur(10px);
    background: var(--glass-card-bg);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-heavy);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2rem;
    color: white;
}

.value-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* CTA Section */
.cta-section {
    position: relative;
    background: var(--gradient-primary);
    color: var(--text-primary);
    text-align: center;
    padding: calc(var(--spacing-xl) * 2.4) 0;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--overlay-strong);
    backdrop-filter: blur(10px);
    z-index: 0;
}

.cta-section .container {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--glass-bg-medium);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

.cta-section p {
    color: var(--text-secondary);
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta-section p {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: calc(var(--spacing-xl) * 0.833);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: var(--spacing-md) calc(var(--spacing-xl) * 0.833);
    background: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 5px 15px var(--shadow-glow);
    backdrop-filter: blur(10px);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-glow);
    background: var(--primary-blue-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .subtitle {
        font-size: 1.1rem;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .content-grid {
        gap: var(--spacing-lg);
    }
}

/* Extra small devices: ensure grids stack cleanly */
@media (max-width: 576px) {
    .content-grid,
    .values-grid,
    .stats-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* Navbar dark theme enhancements */
.navbar.navbar-dark .nav-link {
    color: var(--text-secondary) !important;
}
.navbar.navbar-dark .nav-link:hover,
.navbar.navbar-dark .nav-link:focus,
.navbar.navbar-dark .nav-link.active {
    color: var(--text-primary) !important;
}
.navbar.navbar-dark .navbar-brand {
    color: var(--text-primary) !important;
}
.navbar.navbar-dark .navbar-toggler {
    border-color: var(--bg-accent);
}
/* Force light (visible) hamburger on dark bg using theme vars */
.navbar.navbar-dark .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(241,245,249,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Dropdown caret color for dark theme */
.navbar.navbar-dark .dropdown-toggle::after {
    border-top-color: var(--text-secondary);
    border-right-color: transparent;
    border-left-color: transparent;
}

/* Loading animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

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

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }

/* Footer Styles */
.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--bg-accent);
    color: var(--text-muted);
}

/* Mobile Footer Responsive Adjustments */
@media (max-width: 768px) {
    .footer {
        height: 50px;
        line-height: 50px;
        font-size: 0.9rem;
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 576px) {
    .footer {
        height: 45px;
        line-height: 45px;
        font-size: 0.8rem;
        text-align: center;
    }
}