/* Day 2: JavaScript Basics for QA - BugKart OpenCart Testing */

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: #667eea;
}

.nav-logo i {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

.nav-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-bar {
    width: 200px;
    height: 8px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 10px;
    width: 0%;
    transition: width 0.5s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 2s infinite;
}

.progress-text {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.nav-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: #667eea;
}

.nav-timer i {
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    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 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-intro {
    display: flex;
    align-items: center;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(20px);
    animation: slideUp 0.8s ease forwards;
}

.hero-badge {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    animation: pulse 2s infinite;
}

.hero-info h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-info h2 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(102, 126, 234, 0.2);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.2);
}

.stat-item i {
    font-size: 1.5rem;
    color: #667eea;
}

.stat-item span {
    font-weight: 500;
    color: #333;
    text-align: center;
}

/* Main Content */
.main-content {
    background: #f8fafc;
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
    position: relative;
}

.section-title i {
    margin-right: 1rem;
    color: #667eea;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* Warm-up Section */
.warmup-section {
    background: white;
    padding: 80px 0;
}

.warmup-container {
    max-width: 800px;
    margin: 0 auto;
}

.warmup-question h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
}

.poll-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.poll-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.poll-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.poll-item:hover::before {
    left: 100%;
}

.poll-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3);
}

.poll-item i {
    font-size: 2rem;
}

.poll-item span {
    font-weight: 600;
    text-align: center;
}

.vote-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    font-size: 1.2rem;
}

.warmup-message {
    background: linear-gradient(135deg, #84fab0, #8fd3f4);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    animation: slideUp 0.6s ease;
}

.warmup-message p {
    font-size: 1.1rem;
    color: #333;
    margin: 0;
}

/* Flow Section */
.flow-section {
    background: #f8fafc;
    padding: 80px 0;
}

.flow-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.flow-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #667eea, #764ba2);
    border-radius: 2px;
}

.flow-item {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateX(-50px);
    animation: slideInLeft 0.6s ease forwards;
}

.flow-item:nth-child(even) {
    transform: translateX(50px);
    animation: slideInRight 0.6s ease forwards;
}

.flow-marker {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.flow-marker:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.flow-content {
    flex: 1;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.flow-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.flow-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.flow-content p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.timing {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 1rem;
}

/* Learning Section */
.learning-section {
    background: white;
    padding: 80px 0;
}

.qa-story {
    margin-bottom: 3rem;
}

.story-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3);
    text-align: center;
}

.story-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.story-card p {
    font-size: 1.1rem;
    line-height: 1.6;
    opacity: 0.9;
}

/* Concept Grid */
.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.concept-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.concept-card:hover::before {
    transform: scaleX(1);
}

.concept-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.concept-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.concept-header h3 {
    font-size: 1.3rem;
    color: #333;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-warning {
    background: #ffecd2;
    color: #f39c12;
}

.badge-info {
    background: #d1ecf1;
    color: #17a2b8;
}

.badge-success {
    background: #d4edda;
    color: #28a745;
}

.concept-card p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.qa-context {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.qa-context strong {
    color: #667eea;
}

/* Interactive Demo */
.interactive-demo {
    margin-top: 3rem;
}

.interactive-demo h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.code-editor {
    background: #2d3748;
    border-radius: 15px;
    padding: 2rem;
    color: white;
}

.code-editor h4 {
    margin-bottom: 1rem;
    color: #e2e8f0;
}

.code-editor pre {
    background: #1a202c;
    padding: 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border-left: 4px solid #667eea;
}

.code-editor code {
    font-family: 'Courier New', monospace;
    color: #e2e8f0;
    line-height: 1.5;
}

.output-panel {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.output-panel h4 {
    margin-bottom: 1rem;
    color: #333;
}

.output-content {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 10px;
    min-height: 200px;
    font-family: 'Courier New', monospace;
    color: #333;
    line-height: 1.6;
}

/* Debug Tools */
.debug-tools {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tool-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.tool-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tool-card p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.tool-card .example {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.tool-card code {
    font-family: 'Courier New', monospace;
    color: #667eea;
    font-weight: 600;
}

/* Data Types Grid */
.datatypes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.datatype-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.datatype-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.datatype-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.datatype-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.datatype-card p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.qa-example {
    background: #f8fafc;
    padding: 0.8rem;
    border-radius: 8px;
    font-size: 0.8rem;
    border-left: 3px solid #667eea;
}

.qa-example strong {
    color: #667eea;
}

/* Interactive Questions */
.interactive-question {
    margin-top: 3rem;
}

.interactive-question h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
}

.question-container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.question-container p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.question-container pre {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid #667eea;
    overflow-x: auto;
}

.question-container code {
    font-family: 'Courier New', monospace;
    color: #667eea;
}

.options {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.option-btn {
    padding: 1rem 1.5rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    background: white;
    color: #333;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.option-btn:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.option-btn.correct {
    border-color: #28a745;
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

.option-btn.incorrect {
    border-color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.answer-result {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 600;
    text-align: center;
}

.answer-result.correct {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
    border: 1px solid #28a745;
}

.answer-result.incorrect {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border: 1px solid #dc3545;
}

.explanation {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.explanation p {
    margin: 0;
    color: #666;
    line-height: 1.6;
}

/* Mini Assignment */
.mini-assignment {
    margin-top: 3rem;
}

.mini-assignment h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
}

.assignment-container {
    display: grid;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.assignment-task {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.assignment-task h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #333;
}

.code-input {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.code-input textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.code-input textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(240, 147, 251, 0.3);
}

.btn-accent {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(79, 172, 254, 0.3);
}

.btn-info {
    background: linear-gradient(135deg, #a8edea, #fed6e3);
    color: #333;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(168, 237, 234, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, #ffecd2, #fcb69f);
    color: #333;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 236, 210, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #84fab0, #8fd3f4);
    color: #333;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(132, 250, 176, 0.3);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 3rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.footer-section p {
    line-height: 1.6;
    opacity: 0.9;
}

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

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

.footer-section a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.footer-section a:hover {
    opacity: 1;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 1rem;
}

.close:hover {
    color: #667eea;
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-intro {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }
    
    .hero-badge {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
    
    .hero-info h1 {
        font-size: 2rem;
    }
    
    .hero-info h2 {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .poll-items {
        grid-template-columns: 1fr;
    }
    
    .demo-container {
        grid-template-columns: 1fr;
    }
    
    .flow-item {
        flex-direction: column;
        text-align: center;
    }
    
    .flow-marker {
        align-self: center;
    }
    
    .flow-timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .concept-grid {
        grid-template-columns: 1fr;
    }
    
    .datatypes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .debug-tools {
        grid-template-columns: 1fr;
    }
}