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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #ecf0f1 0%, #bdc3c7 100%);
    min-height: 100vh;
    padding-bottom: 80px;
}

/* Paper Texture Effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 1px 1px, rgba(0,0,0,0.15) 1px, transparent 0);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: -1;
}

/* Header */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
}

header::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-top: 10px solid #2c3e50;
}

.header-content h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header-content p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.welcome-card,
.location-card,
.recycling-guide,
.tracking-form,
.impact-summary,
.tracking-history,
.chart-container,
.add-project,
.community-stats,
.share-tip,
.community-feed {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.05);
    position: relative;
}

.welcome-card::before,
.location-card::before,
.recycling-guide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #3498db, #9b59b6);
    border-radius: 15px 15px 0 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transform: translateY(0);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.stat-card i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-card h3 {
    font-size: 1.8rem;
    margin-bottom: 0.3rem;
    font-weight: bold;
}

.stat-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Quick Actions */
.quick-actions {
    margin-top: 2rem;
}

.quick-actions h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.action-btn {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(46, 204, 113, 0.3);
}

.action-btn i {
    font-size: 1.2rem;
}

/* Primary Button */
.primary-btn {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(52, 152, 219, 0.3);
}

/* Location */
.location-info {
    margin-top: 1rem;
    padding: 1rem;
    background: #ecf0f1;
    border-radius: 8px;
}

.location-info.hidden {
    display: none;
}

.recycling-centers {
    margin-top: 1rem;
}

.recycling-center {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    border-left: 4px solid #2ecc71;
}

/* Material Types */
.material-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.material-card {
    padding: 1.5rem;
    border-radius: 12px;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.material-card::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;
}

.material-card:hover::before {
    left: 100%;
}

.material-card.plastic {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.material-card.paper {
    background: linear-gradient(135deg, #e67e22, #d35400);
}

.material-card.metal {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
}

.material-card.glass {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.material-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.material-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.material-card ul {
    list-style: none;
    margin-bottom: 1rem;
}

.material-card ul li {
    margin-bottom: 0.3rem;
    padding-left: 1rem;
    position: relative;
}

.material-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: rgba(255,255,255,0.8);
}

.material-card .tip {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.9;
}

/* Filter Buttons */
.difficulty-filter,
.project-filter {
    margin-bottom: 2rem;
}

.difficulty-filter h3,
.project-filter h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    background: #ecf0f1;
    color: #2c3e50;
    border: 2px solid transparent;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn.active,
.filter-btn:hover {
    background: #3498db;
    color: white;
    border-color: #2980b9;
}

/* Tips Container */
.tips-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.tip-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border-left: 4px solid #3498db;
    position: relative;
    transition: transform 0.3s ease;
}

.tip-card:hover {
    transform: translateY(-3px);
}

.tip-card.beginner {
    border-left-color: #2ecc71;
}

.tip-card.intermediate {
    border-left-color: #f39c12;
}

.tip-card.advanced {
    border-left-color: #e74c3c;
}

.tip-card h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tip-card p {
    color: #7f8c8d;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.tip-difficulty {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.tip-difficulty.beginner {
    background: #d5f4e6;
    color: #27ae60;
}

.tip-difficulty.intermediate {
    background: #fdeaa7;
    color: #f39c12;
}

.tip-difficulty.advanced {
    background: #fadbd8;
    color: #e74c3c;
}

.tip-actions {
    display: flex;
    gap: 0.5rem;
}

.tip-btn {
    padding: 0.3rem 0.8rem;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.implement-btn {
    background: #2ecc71;
    color: white;
}

.implement-btn:hover {
    background: #27ae60;
}

.implement-btn.implemented {
    background: #95a5a6;
    cursor: not-allowed;
}

/* Progress Section */
.progress-section {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-top: 2rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.progress-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: #ecf0f1;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #2ecc71, #3498db);
    width: 0%;
    transition: width 0.5s ease;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ecf0f1;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Impact Cards */
.impact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.impact-card {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.impact-card:hover {
    transform: translateY(-3px);
}

.impact-card i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.impact-card h4 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.impact-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* History List */
.history-list {
    max-height: 400px;
    overflow-y: auto;
}

.history-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-left: 4px solid #3498db;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item .date {
    font-size: 0.9rem;
    color: #7f8c8d;
}

/* Projects Container */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.project-card {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #e74c3c, #f39c12, #2ecc71, #3498db);
}

.project-card h4 {
    color: #2c3e50;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-category {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.project-category.decoration {
    background: #fadbd8;
    color: #e74c3c;
}

.project-category.storage {
    background: #d5f4e6;
    color: #27ae60;
}

.project-category.garden {
    background: #fdeaa7;
    color: #f39c12;
}

.project-category.fashion {
    background: #ebdef0;
    color: #8e44ad;
}

.project-difficulty {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.project-difficulty.easy {
    background: #d5f4e6;
    color: #27ae60;
}

.project-difficulty.medium {
    background: #fdeaa7;
    color: #f39c12;
}

.project-difficulty.hard {
    background: #fadbd8;
    color: #e74c3c;
}

.project-materials,
.project-instructions {
    margin-bottom: 1rem;
}

.project-materials h5,
.project-instructions h5 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.project-materials p,
.project-instructions p {
    color: #7f8c8d;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Community Posts */
.community-posts {
    max-height: 500px;
    overflow-y: auto;
}

.community-post {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 4px solid #3498db;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.post-author {
    font-weight: bold;
    color: #2c3e50;
}

.post-date {
    font-size: 0.8rem;
    color: #7f8c8d;
}

.post-content {
    color: #2c3e50;
    line-height: 1.5;
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
    margin-top: 2rem;
}

#progress-chart {
    width: 100% !important;
    height: 100% !important;
}

/* FAQ Styles */
.faq-section {
    margin-top: 2rem;
}

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

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.faq-item:hover {
    transform: translateY(-2px);
}

.faq-item.active {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-question i {
    margin-right: 0.5rem;
    color: #3498db;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: bold;
    color: #3498db;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #7f8c8d;
    line-height: 1.6;
    animation: slideDown 0.3s ease;
}

.faq-answer p {
    margin-bottom: 1rem;
}

.faq-answer ul {
    margin-left: 1rem;
    margin-bottom: 1rem;
}

.faq-answer li {
    margin-bottom: 0.5rem;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* FAQ Page Specific Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.breadcrumb {
    margin-bottom: 2rem;
    padding: 0.5rem 0;
    color: #7f8c8d;
}

.breadcrumb a {
    color: #3498db;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.faq-intro {
    text-align: center;
    margin-bottom: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.faq-intro h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.faq-search {
    margin-bottom: 2rem;
}

.search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #7f8c8d;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #ecf0f1;
    border-radius: 25px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.faq-categories {
    margin-bottom: 2rem;
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.faq-categories h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.category-btn {
    background: #ecf0f1;
    color: #2c3e50;
    border: 2px solid transparent;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.category-btn.active,
.category-btn:hover {
    background: #3498db;
    color: white;
    border-color: #2980b9;
}

.impact-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.impact-table th,
.impact-table td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

.impact-table th {
    background: #3498db;
    color: white;
    font-weight: 600;
}

.impact-table tr:hover {
    background: #f8f9fa;
}

.tip-highlight {
    background: #e8f5e8;
    border-left: 4px solid #2ecc71;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.warning-box {
    background: #fff3cd;
    border-left: 4px solid #f39c12;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.privacy-note {
    background: #e3f2fd;
    border-left: 4px solid #3498db;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.offline-features h4 {
    color: #2c3e50;
    margin: 1rem 0 0.5rem;
}

.rewards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.reward-item {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.reward-item i {
    font-size: 2rem;
    color: #3498db;
    margin-bottom: 0.5rem;
    display: block;
}

.reward-item strong {
    color: #2c3e50;
    display: block;
    margin-bottom: 0.5rem;
}

.help-contact {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    text-align: center;
    margin-top: 2rem;
}

.contact-options {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.contact-btn {
    background: #3498db;
    color: white;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    box-shadow: 0 -4px 15px rgba(0,0,0,0.1);
    border-top: 1px solid #ecf0f1;
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #7f8c8d;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    min-width: 60px;
}

.nav-item:hover,
.nav-item.active {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.2rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .material-types {
        grid-template-columns: 1fr;
    }
    
    .tips-container {
        grid-template-columns: 1fr;
    }
    
    .projects-container {
        grid-template-columns: 1fr;
    }
    
    .impact-cards {
        grid-template-columns: 1fr;
    }
    
    .progress-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .contact-options {
        flex-direction: column;
        align-items: center;
    }
    
    .category-filters {
        justify-content: center;
    }
    
    .rewards-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
    
    .nav-item i {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    main {
        padding: 0.5rem;
    }
    
    .welcome-card,
    .location-card,
    .recycling-guide,
    .tracking-form,
    .impact-summary,
    .tracking-history,
    .chart-container,
    .add-project,
    .community-stats,
    .share-tip,
    .community-feed {
        padding: 1rem;
    }
    
    .header-content h1 {
        font-size: 1.3rem;
    }
    
    .header-content p {
        font-size: 0.9rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-card h3 {
        font-size: 1.5rem;
    }
    
    .bottom-nav {
        padding: 0.3rem 0;
    }
    
    .nav-item {
        padding: 0.3rem;
        min-width: 50px;
    }
    
    .nav-item span {
        font-size: 0.5rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

.success {
    color: #2ecc71;
}

.warning {
    color: #f39c12;
}

.error {
    color: #e74c3c;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}