/* ================================================
   NotebookLM Tutorial - CSS Stylesheet
   E-Learning Administration - AlMaarefa University
   Colors inspired by the logo: Blues, Oranges, Gold
   ================================================ */

/* CSS Variables - Logo-inspired Color Palette */
:root {
    /* Primary Colors from Logo */
    --primary-blue: #2c4f8c;
    --primary-blue-dark: #1a3356;
    --primary-blue-light: #4a7bc4;
    --accent-orange: #f5a623;
    --accent-gold: #ffd966;
    --accent-yellow: #ffeb99;
    
    /* Supporting Colors */
    --dark-bg: #0a0e1a;
    --text-white: #ffffff;
    --text-light: #e8eaf0;
    --text-gray: #a0a8b8;
    --card-bg: #1a2137;
    --card-bg-light: #252d47;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2c4f8c 0%, #4a7bc4 100%);
    --gradient-accent: linear-gradient(135deg, #f5a623 0%, #ffd966 100%);
    --gradient-hero: linear-gradient(135deg, #1a3356 0%, #2c4f8c 50%, #4a7bc4 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(74, 123, 196, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ================================================
   Global Styles & Reset
   ================================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ================================================
   Header & Navigation
   ================================================ */

.header {
    background: linear-gradient(180deg, rgba(26, 33, 55, 0.95) 0%, rgba(26, 33, 55, 0.9) 100%);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-md);
    border-bottom: 2px solid var(--primary-blue);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    background: white;
    padding: 5px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 0.2rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text p {
    font-size: 0.85rem;
    color: var(--text-gray);
    font-weight: 400;
}

.main-nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-orange);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* ================================================
   Hero Section
   ================================================ */

.hero {
    position: relative;
    background: var(--gradient-hero);
    padding: 140px 0 80px;
    margin-top: 80px;
    overflow: hidden;
}

.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 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="1200" height="600" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 0.8s ease;
}

.badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: var(--dark-bg);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease;
}

.feature-card-hero {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(74, 123, 196, 0.3);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-glow);
    transition: var(--transition-base);
}

.feature-card-hero:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(74, 123, 196, 0.4);
}

.icon-large {
    font-size: 5rem;
    color: var(--accent-orange);
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(0 0 20px rgba(245, 166, 35, 0.6));
}

.feature-card-hero h3 {
    font-size: 1.8rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-xs);
}

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

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path d="M0,60 Q300,0 600,60 T1200,60 L1200,120 L0,120 Z" fill="%230a0e1a"/></svg>') no-repeat;
    background-size: cover;
}

/* ================================================
   Buttons
   ================================================ */

.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-base);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--dark-bg);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(245, 166, 35, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-blue-light);
    border-color: var(--primary-blue-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

/* ================================================
   Section Styles
   ================================================ */

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.section-tag {
    display: inline-block;
    color: var(--accent-orange);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.section-description {
    font-size: 1.15rem;
    color: var(--text-gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ================================================
   About Section
   ================================================ */

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.about-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.about-card:hover {
    border-color: var(--primary-blue-light);
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
}

.about-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    font-size: 2rem;
    color: var(--dark-bg);
}

.about-card h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ================================================
   Getting Started Section
   ================================================ */

.getting-started-section {
    background: linear-gradient(135deg, #1a2137 0%, #252d47 100%);
}

.steps-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    overflow-x: auto;
    padding: var(--spacing-md) 0;
}

.step-card {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    min-width: 220px;
    flex: 1;
    text-align: center;
    border: 2px solid var(--primary-blue);
    position: relative;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.step-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-orange);
    box-shadow: var(--shadow-lg);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--dark-bg);
    box-shadow: var(--shadow-md);
}

.step-icon {
    font-size: 3rem;
    color: var(--primary-blue-light);
    margin: var(--spacing-sm) 0;
}

.step-card h3 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-xs);
}

.step-card p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-xs);
}

.step-note {
    font-size: 0.85rem;
    color: var(--accent-gold);
    font-style: italic;
}

.step-arrow {
    font-size: 2rem;
    color: var(--accent-orange);
    flex-shrink: 0;
}

.link {
    color: var(--accent-orange);
    font-weight: 600;
    text-decoration: underline;
}

.link:hover {
    color: var(--accent-gold);
}

/* ================================================
   Features Section
   ================================================ */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.feature-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    font-size: 2rem;
    color: var(--accent-gold);
}

.feature-card h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.feature-card > p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.feature-list li {
    color: var(--text-light);
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-list i {
    color: var(--accent-orange);
    font-size: 0.9rem;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-orange);
    font-weight: 600;
    margin-top: var(--spacing-sm);
    transition: var(--transition-base);
}

.feature-link:hover {
    color: var(--accent-gold);
    gap: 1rem;
}

/* ================================================
   Tutorials Section
   ================================================ */

.tutorials-section {
    background: linear-gradient(135deg, #0a0e1a 0%, #1a2137 100%);
}

.tutorial-block {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
    border: 2px solid var(--primary-blue);
    animation: fadeInUp 0.6s ease;
}

.tutorial-header {
    background: var(--gradient-primary);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tutorial-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--accent-gold);
}

.tutorial-header h3 {
    font-size: 1.8rem;
    color: var(--text-white);
    margin-bottom: 0.3rem;
}

.tutorial-duration {
    color: var(--accent-gold);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.tutorial-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tutorial-step {
    display: flex;
    gap: var(--spacing-sm);
}

.step-marker {
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--dark-bg);
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.step-content ul {
    margin-left: var(--spacing-md);
    color: var(--text-gray);
}

.step-content ul li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.tip-box {
    background: rgba(245, 166, 35, 0.1);
    border-left: 4px solid var(--accent-orange);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
    align-items: start;
}

.tip-box i {
    color: var(--accent-orange);
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.tip-box span {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.code-box {
    background: var(--dark-bg);
    border: 1px solid var(--primary-blue);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
    font-family: 'Courier New', monospace;
}

.code-box code {
    color: var(--accent-gold);
    font-size: 0.9rem;
    line-height: 1.6;
}

.tutorial-demo {
    background: var(--card-bg-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 100px;
    height: fit-content;
    min-height: 250px;
}

.demo-placeholder {
    text-align: center;
    color: var(--text-gray);
}

.demo-placeholder i {
    font-size: 4rem;
    color: var(--primary-blue-light);
    margin-bottom: var(--spacing-sm);
}

.demo-placeholder p {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ================================================
   Best Practices Section
   ================================================ */

.practices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.practice-card {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    gap: var(--spacing-sm);
    border: 2px solid transparent;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.practice-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.practice-card i {
    font-size: 2rem;
    color: var(--accent-orange);
    flex-shrink: 0;
}

.practice-card h4 {
    font-size: 1.2rem;
    color: var(--text-white);
    margin-bottom: 0.5rem;
}

.practice-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* ================================================
   FAQ Section
   ================================================ */

.faq-section {
    background: linear-gradient(135deg, #1a2137 0%, #252d47 100%);
}

.faq-container {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
}

.faq-item {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.faq-item:hover {
    border-color: var(--primary-blue-light);
}

.faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-base);
}

.faq-question:hover {
    background: var(--card-bg-light);
}

.faq-question h4 {
    font-size: 1.2rem;
    color: var(--text-white);
    font-weight: 600;
}

.faq-question i {
    color: var(--accent-orange);
    font-size: 1.2rem;
    transition: var(--transition-base);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-answer p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ================================================
   CTA Section
   ================================================ */

.cta-section {
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::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 1200 600"><circle cx="600" cy="300" r="200" fill="rgba(245,166,35,0.1)"/><circle cx="200" cy="150" r="100" fill="rgba(74,123,196,0.1)"/><circle cx="1000" cy="400" r="150" fill="rgba(255,217,102,0.1)"/></svg>');
    animation: float 20s infinite;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ================================================
   Footer
   ================================================ */

.footer {
    background: var(--primary-blue-dark);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 3px solid var(--accent-orange);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-sm);
    background: white;
    padding: 8px;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.footer-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: var(--spacing-xs);
}

.footer-subtitle {
    color: var(--text-gray);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 1.2rem;
    color: var(--accent-orange);
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-xs);
}

.footer-section i {
    color: var(--accent-orange);
    margin-right: 0.5rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-light);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--accent-orange);
    padding-left: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-gray);
    font-size: 0.9rem;
}

.footer-note {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-gray);
}

/* ================================================
   Scroll to Top Button
   ================================================ */

.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border: none;
    border-radius: 50%;
    color: var(--dark-bg);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(245, 166, 35, 0.5);
}

/* ================================================
   Animations
   ================================================ */

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* ================================================
   Responsive Design
   ================================================ */

@media (max-width: 1024px) {
    .tutorial-content {
        grid-template-columns: 1fr;
    }
    
    .tutorial-demo {
        position: static;
    }
    
    .steps-container {
        flex-wrap: wrap;
    }
    
    .step-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    /* Header */
    .logo {
        width: 50px;
        height: 50px;
    }
    
    .logo-text h1 {
        font-size: 1rem;
    }
    
    .logo-text p {
        font-size: 0.75rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-list {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }
    
    .nav-list.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    /* Hero */
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    /* Sections */
    .section-title {
        font-size: 2rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    /* Steps */
    .steps-container {
        flex-direction: column;
    }
    
    .step-card {
        min-width: 100%;
    }
    
    /* CTA */
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-lg: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .about-grid,
    .features-grid,
    .practices-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}