/* 
   Jargon Tutors - Tech Luxury Aesthetic 
   A high-end, modern design with glassmorphism, depth, and characterful typography.
*/

:root {
    /* Colors - Dark Theme (Default) */
    --bg-primary: #020617;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #22d3ee;
    --accent-secondary: #8b5cf6;
    --accent-glow: rgba(34, 211, 238, 0.15);
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Layout */
    --container-max: 1200px;
    --header-height: 80px;
    --section-padding: 100px 0;
    
    /* Transitions */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --transition-fast: 0.3s var(--ease-out-expo);
    --transition-slow: 0.6s var(--ease-out-expo);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-primary: #0891b2;
    --accent-secondary: #7c3aed;
    --accent-glow: rgba(8, 145, 178, 0.05);
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Satoshi', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .logo-text {
    font-family: 'Clash Display', sans-serif;
    font-weight: 600;
}

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* Utils */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

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

/* Background Effects */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 100;
}

.mesh-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(at 0% 0%, hsla(187, 88%, 48%, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, hsla(263, 88%, 59%, 0.1) 0px, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
}

.nav-wrapper {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text span {
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

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

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

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 600;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: calc(var(--header-height) + 50px);
    position: relative;
    background-image: linear-gradient(to bottom, rgba(2, 6, 23, 0.8), rgba(2, 6, 23, 0.9)), 
                      url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=1920&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

[data-theme="light"] .hero {
    background-image: linear-gradient(to bottom, rgba(248, 250, 252, 0.85), rgba(248, 250, 252, 0.95)), 
                      url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=1920&auto=format&fit=crop');
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 48px;
}

.hero-cta {
    max-width: 600px;
    margin: 0 auto;
}

.search-container {
    position: relative;
    margin-bottom: 32px;
}

.search-container input {
    width: 100%;
    padding: 20px 24px 20px 56px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 1.1rem;
    outline: none;
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.search-container input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Clash Display';
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Features */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

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

.feature-card {
    padding: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    transition: var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--accent-glow);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Directory */
.directory-controls {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 48px;
}

.directory-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 24px;
}

.filters {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    color: var(--text-primary);
}

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

.directory-search input {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
}

.jargon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.jargon-card {
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-fast);
}

.jargon-card:hover {
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.jargon-level {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.level-beginner { color: #10b981; }
.level-intermediate { color: #f59e0b; }
.level-advanced { color: #ef4444; }

.jargon-card h4 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.jargon-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex-grow: 1;
    margin-bottom: 24px;
}

.jargon-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.jargon-link:hover gap: 12px;

/* Newsletter */
.newsletter-box {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border: 1px solid var(--border-color);
    padding: 64px;
    border-radius: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.newsletter-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.newsletter-form {
    display: flex;
    gap: 16px;
    flex-grow: 1;
    max-width: 500px;
}

.newsletter-form input {
    flex-grow: 1;
    padding: 16px 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Testimonials */
.testimonial-card {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-quote {
    font-size: 2rem;
    font-family: 'Clash Display';
    font-style: italic;
    margin-bottom: 32px;
    line-height: 1.4;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.testimonial-author img {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: crop;
}

.author-name {
    display: block;
    font-weight: 700;
}

.author-role {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Footer */
.main-footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 64px;
}

.footer-info p {
    color: var(--text-secondary);
    margin: 24px 0;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.social-links a:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

.footer-links h4 {
    margin-bottom: 24px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-links-row {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.footer-link {
    color: #2dd4bf; /* Vibrant Teal */
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-secondary);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.animate-in {
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* Mobile Adjustments */
@media (max-width: 992px) {
    .newsletter-box {
        flex-direction: column;
        text-align: center;
        padding: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-padding {
        padding: 64px 0;
    }

    .directory-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Dark Mode Icon Logic */
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }