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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

/* Light Theme */
[data-theme="light"] {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
}

/* System Preference - Light */
@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bg-color: #f8fafc;
        --card-bg: #ffffff;
        --text-primary: #0f172a;
        --text-secondary: #475569;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 2rem 0;
    animation: fadeInDown 1s ease-out;
}

.logo h1 {
    font-size: 3rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin: 2rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
    animation: fadeIn 1s ease-out 0.3s both;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    animation: fadeIn 1s ease-out 0.6s both;
}

.features h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-decoration: none;
    color: inherit;
    display: block;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
    cursor: pointer;
}

.icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* CTA Section */
.cta {
    text-align: center;
    padding: 3rem 0;
    animation: fadeIn 1s ease-out 0.9s both;
}

.cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Footer */
.site-footer {
    background: var(--card-bg);
    border-top: 2px solid var(--border-color);
    margin-top: 4rem;
    padding: 3rem 0 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-column p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

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

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease, transform 0.2s ease;
    display: inline-block;
}

.footer-column ul li a:hover {
    color: var(--primary-color);
    transform: translateX(3px);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

.footer-bottom a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Footer Responsive */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-column:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem 1.5rem;
        padding: 0 1rem;
    }
    
    .footer-column:first-child {
        grid-column: 1 / -1;
    }
    
    .footer-bottom {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .site-footer {
        padding: 2rem 0 1rem;
    }
}

/* Old footer styles (kept for compatibility) */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Content Pages (About, Privacy) */
.content-page {
    max-width: 900px;
    margin: 0 auto;
    animation: fadeIn 1s ease-out;
}

.content-page h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-section {
    margin-bottom: 3rem;
    line-height: 1.8;
}

.content-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.content-section h4 {
    font-size: 1.3rem;
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.content-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.content-section ul {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.content-section a {
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.content-section a:hover {
    opacity: 0.8;
}

.content-section strong {
    color: var(--text-primary);
}

/* Theme Switcher */
.theme-contact-controls {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.75rem;
    z-index: 1000;
}

.theme-switcher, .contact-btn-fixed {
    background: var(--card-bg);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 0.5rem;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-switcher:hover, .contact-btn-fixed:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.theme-switcher select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    outline: none;
    padding: 0.25rem;
}

.theme-switcher select option {
    background: var(--card-bg);
    color: var(--text-primary);
}

.contact-btn-fixed {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .theme-contact-controls {
        top: 0.5rem;
        right: 0.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .theme-switcher, .contact-btn-fixed {
        padding: 0.5rem;
        font-size: 0.85rem;
    }
    
    .logo h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.1rem;
        padding: 0 1rem;
    }

    .features h3,
    .cta h3 {
        font-size: 1.5rem;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .container {
        padding: 1rem;
    }

    main {
        gap: 2rem;
    }
}