/* Design System & Variables */
:root {
    --bg-primary: #08090d;
    --bg-secondary: #11131c;
    --bg-tertiary: #161925;
    --bg-header: rgba(8, 9, 13, 0.95);
    --bg-features: rgba(17, 19, 28, 0.2);
    
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent: #f59e0b; /* Safety amber */
    --accent-hover: #fbbf24;
    --success: #10b981; /* Status green */
    
    --border-color: #202433;
    --border-color-light: #2e344a;
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.15s ease;
    --transition-theme: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-header: rgba(248, 250, 252, 0.95);
    --bg-features: rgba(226, 232, 240, 0.35);
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    
    --accent: #d97706; /* High contrast amber for light mode */
    --accent-hover: #b45309;
    
    --border-color: #e2e8f0;
    --border-color-light: #cbd5e1;
}

/* Base Styles & Resets */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: var(--transition-theme);
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: var(--transition-theme);
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    text-wrap: balance; /* From legibility guidelines */
    transition: var(--transition-theme);
}

p {
    color: var(--text-secondary);
    text-wrap: pretty; /* From legibility guidelines */
    transition: var(--transition-theme);
}

/* Header Styles */
.header {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-header);
    backdrop-filter: none; /* No glassmorphism */
    transition: var(--transition-theme);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    padding: 0;
}

.theme-toggle:hover {
    border-color: var(--border-color-light);
    color: var(--text-primary);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

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

[data-theme="light"] .theme-toggle .moon-icon {
    display: block;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.logo-link:hover {
    opacity: 0.9;
}

.logo-icon {
    color: var(--accent);
}

.logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.logo-highlight {
    font-weight: 400;
    color: var(--text-secondary);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    position: relative;
    display: inline-block;
}

.status-dot::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--success);
    border-radius: 50%;
    top: 0;
    left: 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }
    70% {
        transform: scale(2.2);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

/* Main Content */
.main-content {
    flex-grow: 1;
}

/* Hero Section */
.hero-section {
    padding: 80px 0 60px 0;
    text-align: center;
    animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 800px;
}

.badge {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--accent);
    border: 1px solid rgba(245, 158, 11, 0.2);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.25rem, 6vw, 3.5rem);
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    font-weight: 800;
}

.hero-subtitle {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    max-width: 600px;
    margin-bottom: 40px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

.btn-icon {
    transition: transform 0.2s ease;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-light);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--text-primary);
}

/* Features Section */
.features-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-features);
    transition: var(--transition-theme);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px;
    transition: var(--transition-smooth);
}

.feature-card:hover {
    border-color: var(--border-color-light);
    transform: translateY(-4px);
}

.feature-icon-wrapper {
    color: var(--accent);
    margin-bottom: 20px;
    display: inline-flex;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Banner Section */
.banner-section {
    padding: 80px 0;
}

.info-banner {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
}

.info-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--accent);
}

.banner-content {
    max-width: 600px;
}

.banner-content h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.banner-content p {
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 40px 0;
    margin-top: auto;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 320px;
}

.footer-description {
    font-size: 0.85rem;
    margin-top: 16px;
    color: var(--text-muted);
}

.footer-links h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-note {
    font-style: italic;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0 40px 0;
    }
    
    .info-banner {
        flex-direction: column;
        align-items: flex-start;
        padding: 30px;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}