/* ==========================================
   AI Web Rehberi — Stylesheet
   ========================================== */

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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-sm: 8px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    color: var(--gray-800);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

img {
    max-width: 100%;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 32px;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--dark);
}

.logo-icon {
    font-size: 1.4rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2px;
    flex-wrap: wrap;
}

.nav-menu a {
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-menu a:hover {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all 0.3s;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    padding: 140px 0 100px;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    color: var(--white);
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    left: -100px;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    font-size: 0.9rem;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #818cf8, #38bdf8, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
}

.stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   Sections
   ========================================== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   AI Tools Grid
   ========================================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.tools-category-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.tools-category-desc {
    color: var(--gray-500);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.tool-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

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

.tool-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.03), rgba(99, 102, 241, 0.08));
}

.tool-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.tool-icon {
    font-size: 2.5rem;
}

.tool-badge {
    padding: 4px 12px;
    background: var(--primary);
    color: var(--white);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tool-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.tool-desc {
    color: var(--gray-500);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.tool-features {
    list-style: none;
    margin-bottom: 20px;
}

.tool-features li {
    padding: 4px 0;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.tool-how {
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-size: 0.9rem;
}

.tool-how strong {
    display: block;
    margin-bottom: 8px;
    color: var(--dark);
}

.tool-how ol {
    padding-left: 20px;
}

.tool-how li {
    margin-bottom: 6px;
    color: var(--gray-600);
}

.tool-how a {
    font-weight: 600;
}

/* Comparison Box */
.comparison-box {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.comparison-box h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 32px;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.comparison-item {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 20px;
}

.comparison-item strong {
    display: block;
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 1rem;
}

.comparison-item p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: 24px;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.comparison-table thead th {
    background: var(--dark);
    color: var(--white);
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    white-space: nowrap;
}

.comparison-table thead th:first-child {
    border-radius: var(--radius-sm) 0 0 0;
}

.comparison-table thead th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.comparison-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    vertical-align: middle;
}

.comparison-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.04);
}

.comparison-table tbody td:first-child {
    font-weight: 600;
    color: var(--dark);
    white-space: nowrap;
}

.comparison-table .check {
    color: var(--success);
}

.comparison-table .partial {
    color: var(--accent);
}

.comparison-table .cross {
    color: var(--gray-300);
}

/* Resources Section */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: 20px;
    margin-top: 32px;
}

.resource-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s;
}

.resource-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.resource-card h4 {
    color: var(--dark);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.resource-card h4 a {
    color: var(--dark);
}

.resource-card h4 a:hover {
    color: var(--primary);
}

.resource-card p {
    color: var(--gray-500);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* Font Info Box */
.font-info-box {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.04), rgba(14, 165, 233, 0.1));
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-top: 24px;
}

.font-info-box h4 {
    color: var(--dark);
    margin-bottom: 12px;
}

.font-info-box p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.font-samples {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 16px 0;
}

.font-sample {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 16px 20px;
    text-align: center;
    min-width: 160px;
}

.font-sample .sample-text {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.font-sample .sample-name {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-family: var(--font-mono);
}

/* ==========================================
   Prompt Guide
   ========================================== */
.prompt-principles {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 40px;
}

.principle-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
}

.principle-number {
    position: absolute;
    top: -16px;
    left: 32px;
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
}

.principle-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 16px;
    padding-left: 4px;
}

.prompt-comparison {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.prompt-bad, .prompt-good {
    flex: 1;
    min-width: min(280px, 100%);
    border-radius: var(--radius-sm);
    padding: 20px;
}

.prompt-bad {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.prompt-good {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.prompt-label {
    display: block;
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.prompt-bad code, .prompt-good code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    white-space: pre-wrap;
    color: var(--gray-800);
}

.principle-tip {
    color: var(--gray-600);
    margin-bottom: 16px;
}

.steps-example {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--gray-50);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
}

.step-badge {
    background: var(--primary);
    color: var(--white);
    padding: 2px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.step-item code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--gray-700);
}

.tip-box {
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border: 1px solid #fde68a;
    border-radius: var(--radius-lg);
    padding: 32px;
}

.tip-box h3, .tip-box h4 {
    color: #92400e;
    margin-bottom: 12px;
}

.tip-box p {
    color: #78350f;
    font-size: 0.95rem;
}

.tip-box em {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
}

/* ==========================================
   Projects
   ========================================== */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.project-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s;
}

.project-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.project-image {
    background: linear-gradient(135deg, var(--dark), var(--dark-light));
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.project-mockup {
    width: 100%;
    max-width: 200px;
    background: var(--gray-800);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mockup-nav {
    height: 8px;
    background: var(--gray-600);
    border-radius: 4px;
}

.mockup-hero-block {
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

.mockup-grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
    height: 30px;
}

.mockup-grid-3::before, .mockup-grid-3::after {
    content: '';
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-grid-3 {
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-footer {
    height: 6px;
    background: var(--gray-700);
    border-radius: 2px;
}

.mockup-post {
    height: 20px;
    background: var(--gray-600);
    border-radius: 4px;
}

.mockup-hero-big {
    height: 50px;
    background: linear-gradient(135deg, #92400e, #d97706);
    border-radius: 4px;
}

.mockup-menu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    height: 40px;
}

.mockup-menu-grid::before, .mockup-menu-grid::after {
    content: '';
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-sidebar {
    width: 35%;
    background: var(--primary-dark);
    border-radius: 4px;
    min-height: 120px;
    float: left;
    margin-right: 8px;
}

.mockup-main-content {
    background: var(--gray-600);
    border-radius: 4px;
    min-height: 120px;
}

.mockup-hero-split {
    height: 50px;
    background: linear-gradient(90deg, var(--primary), transparent 50%);
    border-radius: 4px;
}

.mockup-features {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
    height: 25px;
}

.mockup-features::before, .mockup-features::after {
    content: '';
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-features {
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-cta {
    height: 15px;
    background: var(--primary);
    border-radius: 4px;
    width: 60%;
    margin: 0 auto;
}

.mockup-masonry {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.mockup-masonry::before {
    content: '';
    background: var(--gray-500);
    border-radius: 2px;
    height: 40px;
}

.mockup-masonry::after {
    content: '';
    background: var(--gray-600);
    border-radius: 2px;
    height: 40px;
}

/* Data Viewer Mockup */
.mockup-data {
    width: 100%;
    max-width: 200px;
    background: var(--gray-800);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mockup-table {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.mockup-table-header {
    height: 10px;
    background: var(--primary);
    border-radius: 2px;
}

.mockup-table-row {
    height: 8px;
    background: var(--gray-600);
    border-radius: 2px;
}

.mockup-table-row:nth-child(odd) {
    background: var(--gray-700);
}

/* Event/Wedding Mockup */
.mockup-event {
    width: 100%;
    max-width: 200px;
    background: var(--gray-800);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mockup-event-hero {
    height: 50px;
    background: linear-gradient(135deg, #d4af37, #2d5a27);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mockup-event-details {
    height: 25px;
    background: var(--gray-600);
    border-radius: 4px;
}

.mockup-event-rsvp {
    height: 20px;
    background: #d4af37;
    border-radius: 4px;
    width: 70%;
    margin: 0 auto;
}

.project-content {
    padding: 32px 32px 32px 0;
}

.project-difficulty {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-difficulty.easy {
    background: #d1fae5;
    color: #065f46;
}

.project-difficulty.medium {
    background: #fef3c7;
    color: #92400e;
}

.project-card h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.project-card > .project-content > p {
    color: var(--gray-500);
    margin-bottom: 20px;
}

.project-prompt {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
}

.prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-600);
}

.copy-btn {
    padding: 4px 14px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: var(--primary-dark);
}

.prompt-text {
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--gray-700);
    white-space: pre-wrap;
    max-height: 200px;
    overflow-y: auto;
}

/* ==========================================
   Hosting Section
   ========================================== */
.hosting-main {
    margin-bottom: 60px;
}

.hosting-hero-card {
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 48px;
}

.hosting-hero-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.hosting-icon {
    font-size: 2.5rem;
}

.hosting-hero-header h3 {
    font-size: 1.8rem;
    color: var(--dark);
}

.hosting-badge {
    padding: 4px 14px;
    background: var(--accent);
    color: var(--dark);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
}

.hosting-desc {
    font-size: 1.05rem;
    color: var(--gray-600);
    margin-bottom: 36px;
    max-width: 700px;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: 32px;
}

.step {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--gray-100);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
}

.step-content h4 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.step-content p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    margin: 12px 0;
    font-size: 0.9rem;
    color: #1e40af;
}

.warning-box {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    margin: 12px 0;
    font-size: 0.9rem;
    color: #991b1b;
}

.info-box ul,
.warning-box ul {
    padding-left: 20px;
    margin: 8px 0 0 0;
}

.info-box li,
.warning-box li {
    padding-left: 4px;
}

.url-display {
    background: var(--dark);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    margin: 12px 0;
    overflow-x: auto;
}

.url-display code {
    color: var(--success);
    font-family: var(--font-mono);
    font-size: clamp(0.85rem, 2.5vw, 1.1rem);
    word-break: break-all;
}

.update-guide {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 24px;
}

.update-guide h4 {
    color: var(--dark);
    margin-bottom: 8px;
}

.update-guide p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* Guide Screenshots */
.guide-screenshot {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 20px;
    margin: 24px 0;
}

.guide-screenshot img {
    max-width: 100%;
    border-radius: 8px;
}

/* GitHub Pages Limits */
.limits-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.04), rgba(99, 102, 241, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-top: 32px;
}

.limits-box h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.limits-box > p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.limits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.limit-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    border: 1px solid var(--gray-200);
}

.limit-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.limit-label {
    display: block;
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* Alt Hosting Steps */
.alt-hosting-steps {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
    font-size: 0.9rem;
}

.alt-hosting-steps strong {
    display: block;
    color: var(--dark);
    margin-bottom: 8px;
}

.alt-hosting-steps ol {
    padding-left: 20px;
}

.alt-hosting-steps li {
    margin-bottom: 6px;
    color: var(--gray-600);
}

/* Alternative Hosting */
.subsection-title {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 24px;
    text-align: center;
}

.hosting-alternatives {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.alt-hosting-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s;
}

.alt-hosting-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.alt-hosting-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.alt-hosting-card h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.alt-hosting-card p {
    color: var(--gray-500);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.alt-hosting-card ul {
    list-style: none;
}

.alt-hosting-card li {
    padding: 3px 0;
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* ==========================================
   Frontend & Backend Section
   ========================================== */
.fb-explainer {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.fb-card {
    flex: 1;
    min-width: min(280px, 100%);
    padding: 32px;
    border-radius: var(--radius-lg);
}

.fb-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.fb-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.fb-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.fb-card li {
    padding: 4px 0;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.fb-frontend {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
}

.fb-frontend h3 { color: #1e40af; }

.fb-backend {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.fb-backend h3 { color: #991b1b; }

.fb-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    min-width: 80px;
}

.fb-arrow span {
    font-size: 2rem;
    color: var(--gray-400);
}

.fb-arrow small {
    font-size: 0.75rem;
    color: var(--gray-400);
    white-space: nowrap;
}

.fb-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.fb-tech span {
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-700);
}

.fb-analogy {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 32px;
}

.fb-analogy h4 {
    color: var(--dark);
    margin-bottom: 12px;
}

.fb-analogy p {
    color: var(--gray-600);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* Static vs Dynamic */
.static-dynamic {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.sd-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.sd-card h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.sd-card > p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.sd-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.sd-examples span {
    padding: 4px 12px;
    background: var(--gray-100);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--gray-700);
}

/* Data Storage Section */
.data-storage-section {
    margin-top: 48px;
}

.storage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: 20px;
}

.storage-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.storage-item h4 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.storage-item > p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.storage-item ul {
    list-style: none;
    margin-bottom: 12px;
}

.storage-item li {
    padding: 3px 0;
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* ==========================================
   Backend Section
   ========================================== */
.backend-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.backend-card {
    border-radius: var(--radius-lg);
    padding: 36px;
}

.backend-card.can-do {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.backend-card.cannot-do {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.backend-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.backend-card ul {
    list-style: none;
}

.backend-card li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.backend-card li:last-child {
    border-bottom: none;
}

.backend-card li strong {
    display: block;
    font-size: 0.95rem;
    color: var(--dark);
}

.backend-card li span {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.workaround-section {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 48px;
}

.workaround-section h3 {
    font-size: 1.4rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.workaround-section > p {
    color: var(--gray-500);
    margin-bottom: 24px;
}

.workaround-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.workaround-item {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 24px;
}

.workaround-item h4 {
    color: var(--dark);
    margin-bottom: 8px;
    font-size: 1rem;
}

.workaround-item p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.full-backend-section h3 {
    font-size: 1.4rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.full-backend-section > p {
    color: var(--gray-500);
    margin-bottom: 24px;
}

.backend-platforms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.platform-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s;
}

.platform-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}

.platform-card h4 {
    color: var(--dark);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.platform-card p {
    color: var(--gray-500);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.platform-card a {
    font-weight: 600;
    font-size: 0.9rem;
}

/* ==========================================
   Manual Edits Section
   ========================================== */
.edits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 24px;
}

.edit-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.edit-card h3 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.edit-card > p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.code-example {
    background: var(--dark);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 12px;
}

.code-header {
    background: var(--dark-light);
    padding: 8px 16px;
    font-size: 0.8rem;
    color: var(--gray-400);
    font-family: var(--font-mono);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.code-example pre {
    padding: 16px;
    overflow-x: auto;
}

.code-example code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.8;
    color: var(--gray-300);
}

.code-comment {
    color: var(--gray-500);
}

.code-old {
    color: #f87171;
    text-decoration: line-through;
}

.code-new {
    color: #34d399;
    font-weight: 600;
}

.edit-tip {
    font-size: 0.85rem;
    color: var(--gray-500);
    background: var(--gray-50);
    padding: 12px;
    border-radius: var(--radius-sm);
}

.edit-tip code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: var(--gray-200);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--gray-700);
}

/* ==========================================
   Fundamentals Section
   ========================================== */
.fundamentals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.fundamental-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all 0.3s;
}

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

.fund-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.fundamental-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.fundamental-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.analogy {
    background: rgba(99, 102, 241, 0.06);
    color: var(--primary-dark);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-style: italic;
    margin-bottom: 16px;
}

.code-mini {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
}

.code-mini code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-600);
    background: var(--gray-50);
    padding: 4px 10px;
    border-radius: 4px;
}

/* Responsive Design Demo */
.concept-section {
    margin-bottom: 48px;
}

.concept-section h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 12px;
    text-align: center;
}

.concept-section > p {
    text-align: center;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto 36px;
}

.responsive-demo {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    padding: 40px 20px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.device {
    text-align: center;
}

.device span {
    display: block;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--gray-600);
}

.device small {
    color: var(--gray-400);
    font-size: 0.75rem;
}

.device-frame {
    background: var(--dark);
    border-radius: 12px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
}

.device-mobile .device-frame {
    width: 80px;
    height: 140px;
}

.device-tablet .device-frame {
    width: 140px;
    height: 180px;
}

.device-desktop .device-frame {
    width: 240px;
    height: 160px;
    border-radius: 8px 8px 0 0;
}

.device-screen {
    background: var(--gray-800);
    border-radius: 6px;
    height: 100%;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mini-nav {
    height: 6px;
    background: var(--gray-600);
    border-radius: 2px;
}

.mini-block {
    background: var(--gray-600);
    border-radius: 2px;
    flex: 1;
}

.mini-block.wide {
    width: 100%;
}

.mini-row {
    display: flex;
    gap: 3px;
    flex: 1;
}

.mini-hero {
    height: 30px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 3px;
}

/* Concepts Grid */
.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: 20px;
}

.concept-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 24px;
}

.concept-card h4 {
    color: var(--dark);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.concept-card p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.concept-card code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 4px;
}

/* ==========================================
   Local Development
   ========================================== */
.local-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 60px;
}

.method-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.method-number {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary);
    color: var(--white);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.method-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.method-card > p {
    color: var(--gray-600);
    margin-bottom: 16px;
}

.method-card ol {
    padding-left: 20px;
    margin-bottom: 16px;
}

.method-card li {
    color: var(--gray-600);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.method-pros-cons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pro, .con {
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
}

.pro {
    background: #d1fae5;
    color: #065f46;
}

.con {
    background: #fef3c7;
    color: #92400e;
}

/* Dev Tools */
.devtools-section {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.devtools-section > h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.devtools-section > p {
    color: var(--gray-600);
    margin-bottom: 32px;
}

.devtools-open {
    margin-bottom: 32px;
}

.devtools-open h4 {
    color: var(--dark);
    margin-bottom: 16px;
}

.browser-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.browser-shortcut-group {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 20px;
}

.browser-label {
    font-weight: 600;
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.shortcut-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.shortcut {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.shortcut kbd {
    display: inline-block;
    padding: 8px 16px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--dark);
    box-shadow: 0 2px 0 var(--gray-300);
}

.shortcut span {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.devtools-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.devtool-tab {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 24px;
}

.devtool-tab h4 {
    color: var(--dark);
    margin-bottom: 8px;
}

.devtool-tab p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.devtool-tip {
    font-size: 0.85rem !important;
    color: var(--primary) !important;
    font-style: italic;
}

/* Device Toolbar Guide */
.device-toolbar-guide {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.device-toolbar-guide > h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.device-toolbar-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dt-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.dt-step-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.dt-step-content {
    color: var(--gray-700);
    font-size: 0.95rem;
    line-height: 1.7;
}

.dt-step-content kbd {
    display: inline-block;
    padding: 2px 8px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--dark);
    box-shadow: 0 1px 0 var(--gray-300);
}

/* ==========================================
   Checklist
   ========================================== */
.checklist-container {
    max-width: 700px;
    margin: 0 auto;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--gray-100);
}

.checklist-item:last-child {
    border-bottom: none;
}

.checklist-item input[type="checkbox"] {
    width: 24px;
    height: 24px;
    min-width: 24px;
    margin-top: 2px;
    accent-color: var(--primary);
    cursor: pointer;
}

.checklist-item label {
    cursor: pointer;
}

.checklist-item label strong {
    display: block;
    color: var(--dark);
    font-size: 1rem;
    margin-bottom: 2px;
}

.checklist-item label span {
    color: var(--gray-500);
    font-size: 0.85rem;
}

.checklist-item input:checked + label strong {
    text-decoration: line-through;
    color: var(--gray-400);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    display: block;
    margin-bottom: 12px;
}

.footer-main p {
    font-size: 0.9rem;
    max-width: 400px;
    line-height: 1.8;
}

.footer-links h4 {
    color: var(--white);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    padding: 4px 0;
    color: var(--gray-400);
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.footer-bottom {
    padding: 32px 0 24px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-credits {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.footer-credit-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 16px;
    color: var(--gray-400);
    font-size: 0.85rem;
}

.footer-credit-item strong {
    color: var(--white);
}

.footer-credit-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.footer-opensource {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.footer-opensource-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1rem;
    color: var(--white);
    margin-bottom: 12px;
}

.footer-repo-link {
    display: inline-block;
    color: var(--primary-light) !important;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 6px 14px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 6px;
    margin-bottom: 16px;
    transition: background 0.2s;
}

.footer-repo-link:hover {
    background: rgba(99, 102, 241, 0.2);
}

.footer-contribute {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.footer-year {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 0;
}

/* ==========================================
   Back to Top
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ==========================================
   Animations
   ========================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--gray-200);
        flex-direction: column;
        padding: 16px 24px;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .project-card {
        grid-template-columns: 1fr;
    }

    .project-image {
        min-height: 200px;
    }

    .project-content {
        padding: 24px;
    }

    .backend-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .fb-explainer {
        flex-direction: column;
    }

    .fb-arrow {
        flex-direction: row;
        gap: 8px;
        padding: 8px;
    }

    .fb-arrow span {
        transform: rotate(90deg);
    }

    .static-dynamic {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 30px;
    }

    .section {
        padding: 60px 0;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .hosting-hero-card {
        padding: 24px;
    }

    .edits-grid {
        grid-template-columns: 1fr;
    }

    .fundamentals-grid {
        grid-template-columns: 1fr;
    }

    .responsive-demo {
        gap: 20px;
    }

    .step {
        flex-direction: column;
        gap: 12px;
    }

    .comparison-box {
        padding: 24px;
    }

    .prompt-comparison {
        flex-direction: column;
    }

    .shortcut-grid {
        justify-content: center;
    }

    .comparison-table {
        font-size: 0.8rem;
    }

    .comparison-table thead th {
        padding: 10px 10px;
        font-size: 0.78rem;
    }

    .comparison-table tbody td {
        padding: 10px 10px;
    }

    .comparison-box > div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }

    .resources-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .tool-card, .edit-card, .method-card, .principle-card {
        padding: 20px;
    }

    .hosting-hero-card {
        padding: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .devtools-section {
        padding: 20px;
    }

    .browser-shortcut-group {
        padding: 16px;
    }

    .info-box, .warning-box {
        padding: 16px;
    }

    pre {
        font-size: 0.75rem;
    }
}

/* ==========================================
   Scrollbar
   ========================================== */
.prompt-text::-webkit-scrollbar {
    width: 6px;
}

.prompt-text::-webkit-scrollbar-track {
    background: transparent;
}

.prompt-text::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

/* ==========================================
   Selection
   ========================================== */
::selection {
    background: rgba(99, 102, 241, 0.2);
    color: var(--dark);
}

/* ==========================================
   Print
   ========================================== */
@media print {
    .navbar, .back-to-top, .hero-bg-shapes {
        display: none;
    }

    .hero {
        background: var(--dark);
        min-height: auto;
        padding: 40px 0;
    }

    .section {
        padding: 40px 0;
    }
}