/* CSS Stylesheet for Homework Request Form */
/* Cleaned and optimized version - Duplicates Removed */

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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --border-focus: #6366f1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

/* Navigation Header Styles */
.nav-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

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

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-image {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-image:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.15);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #007cba 0%, #005a87 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.header h1 {
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 700;
    margin-bottom: 10px;
}

.header .tagline {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.header .description,
.header p {
    font-size: 1rem;
    opacity: 0.8;
    margin: 0 auto;
    max-width: 600px;
}

/* Main Form Card */
.form-card {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 2rem;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px 16px 0 0;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2rem;
    margin-right: 1rem;
    display: block;
}

.feature-text {
    font-weight: 500;
    color: var(--text-primary);
}

/* Form Styles */
.form-group {
    margin-bottom: 2rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.textarea-container {
    position: relative;
}

.form-textarea {
    width: 100%;
    min-height: 120px;
    max-height: 300px;
    padding: 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.6;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
    resize: vertical;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-textarea:focus,
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--bg-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-textarea::placeholder {
    color: var(--text-light);
}

/* File Upload Styles */
.file-upload-container {
    position: relative;
    margin-bottom: 2rem;
}

.file-upload {
    position: relative;
    display: inline-block;
    width: 100%;
}

.file-upload-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem;
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 80px;
}

.file-upload-label:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
    color: var(--primary-color);
}

.file-upload-icon {
    font-size: 1.5rem;
}

.file-info {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: none;
}

.file-info.show {
    display: block;
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.submit-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;
}

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

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Solution Display Styles */
.solution-card {
    background: white;
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-bottom: 2rem;
}

.solution-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.solution-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.solution-date {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.file-badge {
    background: var(--success-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Question/Answer Display */
.question-section {
    margin-top: 1rem;
}

.question-display {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--accent-color);
    display: none;
}

.question-display.show {
    display: block;
    animation: slideIn 0.5s ease;
}

.question-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.question-text {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.answer-display {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: none;
    position: relative;
}

.answer-display.show {
    display: block;
    animation: slideIn 0.5s ease;
}

.solution-content {
    padding: 2rem;
}

.answer-label,
.solution-label {
    font-weight: 600;
    color: var(--success-color);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.answer-text,
.solution-text {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
    line-height: 1.8;
    word-wrap: break-word;
    margin-bottom: 1rem;
}

/* Solution text formatting */
.solution-text h1,
.solution-text h2,
.solution-text h3 {
    margin: 1.5rem 0 1rem 0;
    color: var(--text-primary);
}

.solution-text h1 {
    font-size: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.solution-text h2 {
    font-size: 1.3rem;
}

.solution-text h3 {
    font-size: 1.1rem;
}

.solution-text ul,
.solution-text ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.solution-text li {
    margin: 0.5rem 0;
}

.solution-text p {
    margin: 1rem 0;
}

.solution-text strong {
    font-weight: 600;
    color: var(--text-primary);
}

.solution-text em {
    font-style: italic;
    color: var(--text-secondary);
}

.solution-text code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.solution-text pre {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

.solution-text pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* Share Section */
.share-section {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-top: 1rem;
    text-align: center;
}

.share-section h4,
.share-title {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.share-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.share-url-container {
    display: flex;
    gap: 0.5rem;
}

.share-url {
    flex: 1;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    word-break: break-all;
}

.copy-btn {
    padding: 0.75rem 1.5rem;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s ease;
    white-space: nowrap;
}

.copy-btn:hover {
    background: #059669;
}

/* Action Buttons */
.actions {
    background: var(--bg-secondary);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin: 0.5rem;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Loading Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: 24px;
    padding: 2.5rem;
    text-align: center;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.loading-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.countdown {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0.25rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

.ad-banner {
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.ad-placeholder {
    width: 100%;
    max-width: 728px;
    height: 90px;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-weight: 500;
    margin: 0 auto;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

.footer p {
    margin-bottom: 10px;
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

/* Utility Classes */
.typing-cursor::after {
    content: '|';
    animation: pulse 1s infinite;
    color: var(--primary-color);
}

.solution-categories {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.typing-cursor-inline {
    animation: pulse 1s infinite;
    color: var(--primary-color);
    font-weight: bold;
}

/* Navigation */
.nav {
    background: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-links a:hover {
    background: #007cba;
    color: white;
}

.nav-links a.active {
    background: #007cba;
    color: white;
}

/* Featured Posts Section */
.featured-section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: #007cba;
    margin: 10px auto;
    border-radius: 2px;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.post-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.post-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-content {
    padding: 25px;
}

.post-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    line-height: 1.4;
}

.post-title a {
    text-decoration: none;
    color: inherit;
}

.post-title a:hover {
    color: #007cba;
}

.post-excerpt {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.5;
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #888;
}

.post-date {
    font-weight: 500;
}

.read-more {
    color: #007cba;
    text-decoration: none;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s;
}

.read-more:hover {
    background: #007cba;
    color: white;
}

/* Categories Section */
.categories-section {
    margin-bottom: 60px;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.category-block {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.category-title {
    font-size: 1.8rem;
    color: #007cba;
    margin-bottom: 15px;
    font-weight: 600;
    text-transform: capitalize;
}

.category-description {
    color: #666;
    margin-bottom: 25px;
    font-style: italic;
}

.category-posts {
    list-style: none;
}

.category-post-item {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    transition: all 0.3s;
}

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

.category-post-item:hover {
    background: #f8f9fa;
    margin: 0 -15px;
    padding-left: 15px;
    padding-right: 15px;
    border-radius: 8px;
}

.category-post-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.category-post-title a {
    text-decoration: none;
    color: #333;
}

.category-post-title a:hover {
    color: #007cba;
}

.category-post-excerpt {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
}

.category-post-date {
    font-size: 0.85rem;
    color: #888;
}

/* Main Content */
.main-content {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
    /* display: grid; */
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.last-updated {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid #007cba;
}

.last-updated p {
    margin: 0;
    color: #666;
    font-size: 0.9rem;
}

h1 {
    font-size: 2rem;
    margin-bottom: 20px;
}

h2 {
    color: #333;
    font-size: 1.5rem;
    margin: 30px 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid #e0e0e0;
}

h3 {
    color: #555;
    font-size: 1.2rem;
    margin: 20px 0 10px 0;
}

p {
    margin-bottom: 15px;
    line-height: 1.7;
}

ul,
ol {
    margin-bottom: 15px;
    padding-left: 25px;
}

li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.important-notice {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.important-notice h3 {
    color: #856404;
    margin-top: 0;
}

.important-notice p {
    color: #856404;
    margin-bottom: 0;
}

.prohibited-box {
    background: #f8d7da;
    border: 1px solid #dc3545;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.prohibited-box h3 {
    color: #721c24;
    margin-top: 0;
}

.contact-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.contact-info h3 {
    margin-top: 0;
    color: #007cba;
}

.contact-info a {
    color: #007cba;
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

.agreement-box {
    background: #d4edda;
    border: 1px solid #28a745;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.agreement-box h3 {
    color: #155724;
    margin-top: 0;
}

.highlight-box {
    background: #e3f2fd;
    border: 1px solid #2196f3;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.highlight-box h3 {
    color: #1976d2;
    margin-top: 0;
}

/* Contact Form */
.contact-form {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-title {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

.info-title {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: #007cba;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 1.2rem;
}

.info-content h3 {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 5px;
}

.info-content p {
    color: #666;
    margin: 0;
}

/* Message Alert */
.message-alert {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 8px;
    font-weight: 500;
}

.message-alert.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message-alert.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message-alert.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* FAQ Section */
.faq-section {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

.faq-title {
    font-size: 2rem;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 600;
}

.faq-item {
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}

.faq-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.faq-question {
    font-size: 1.2rem;
    font-weight: 600;
    color: #007cba;
    margin-bottom: 10px;
}

.faq-answer {
    color: #666;
    line-height: 1.6;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007cba;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-link {
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }

    .logo-image {
        height: 40px;
    }

    .nav-content {
        flex-direction: column;
        gap: 15px;
    }

    .container {
        padding: 1rem;
    }

    .form-card,
    .solution-card {
        padding: 1.5rem;
        border-radius: 16px;
    }

    .solution-header,
    .solution-content {
        padding: 1.5rem;
    }

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

    .header h1 {
        font-size: 2rem;
    }

    .header .tagline {
        font-size: 1.1rem;
    }

    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }

    .solution-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .share-url-container {
        flex-direction: column;
    }

    .main-content {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 25px;
    }

    .contact-form,
    .contact-info,
    .faq-section {
        padding: 25px;
    }

    .form-title,
    .info-title,
    .faq-title {
        font-size: 1.5rem;
    }

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

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

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .submit-btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    .feature-icon {
        margin-right: 0.5rem;
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}