/* ========================================
   PMFUQ.COM - 工程知識網站樣式表
   ======================================== */

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

:root {
    /* 主色調 */
    --primary: #1565C0;
    --primary-dark: #0D47A1;
    --primary-light: #1976D2;
    --secondary: #FF6F00;
    --secondary-dark: #E65100;
    --secondary-light: #FFA726;
    
    /* 中性色 */
    --gray-900: #212121;
    --gray-800: #424242;
    --gray-700: #616161;
    --gray-600: #757575;
    --gray-500: #9E9E9E;
    --gray-400: #BDBDBD;
    --gray-300: #E0E0E0;
    --gray-200: #EEEEEE;
    --gray-100: #F5F5F5;
    --white: #FFFFFF;
    
    /* 功能色 */
    --success: #2E7D32;
    --warning: #F57C00;
    --danger: #C62828;
    --info: #0288D1;
    
    /* 字體 */
    --font-primary: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
    --font-mono: 'Source Code Pro', 'Consolas', monospace;
    
    /* 陰影 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
    --shadow-xl: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
    
    /* 圓角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 過渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    line-height: 1.8;
    color: var(--gray-800);
    background-color: var(--gray-100);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.4;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo:hover {
    text-decoration: none;
    color: var(--white);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.nav {
    display: flex;
    gap: 0.5rem;
}

.nav a {
    color: rgba(255,255,255,0.9);
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
}

.nav a:hover {
    background: rgba(255,255,255,0.15);
    color: var(--white);
    text-decoration: none;
}

.nav a.active {
    background: var(--secondary);
    color: var(--white);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    color: var(--white);
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

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

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--secondary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
    color: var(--white);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary);
}

.btn-secondary:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
    text-decoration: none;
}

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

.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
    text-decoration: none;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section-light {
    background: var(--white);
}

.section-dark {
    background: var(--gray-900);
    color: var(--white);
}

.section-dark h2, .section-dark h3 {
    color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
}

.section-header p {
    color: var(--gray-600);
    max-width: 600px;
    margin: 1rem auto 0;
}

.section-dark .section-header p {
    color: var(--gray-400);
}

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

.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--white);
    margin-bottom: 1.5rem;
}

.card-icon.orange {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
}

.card-icon.green {
    background: linear-gradient(135deg, var(--success) 0%, #4CAF50 100%);
}

.card-icon.blue {
    background: linear-gradient(135deg, var(--info) 0%, #03A9F4 100%);
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.card-link {
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.card-link:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* Tool Cards */
.tool-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.tool-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-card-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.tool-card h4 {
    font-size: 1.125rem;
    margin: 0;
}

.tool-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
    flex-grow: 1;
}

.tool-card-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

/* Category Sections */
.category-section {
    padding: 3rem 0;
    border-bottom: 1px solid var(--gray-200);
}

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

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.category-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--white);
}

.category-icon.orange { background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%); }
.category-icon.green { background: linear-gradient(135deg, #2E7D32 0%, #4CAF50 100%); }
.category-icon.red { background: linear-gradient(135deg, #C62828 0%, #EF5350 100%); }
.category-icon.purple { background: linear-gradient(135deg, #7B1FA2 0%, #AB47BC 100%); }
.category-icon.teal { background: linear-gradient(135deg, #00796B 0%, #26A69A 100%); }
.category-icon.cyan { background: linear-gradient(135deg, #0097A7 0%, #26C6DA 100%); }
.category-icon.brown { background: linear-gradient(135deg, #5D4037 0%, #8D6E63 100%); }
.category-icon.indigo { background: linear-gradient(135deg, #303F9F 0%, #5C6BC0 100%); }

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Article Cards */
.article-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

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

.article-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--gray-200);
}

.article-card-content {
    padding: 1.5rem;
}

.article-card-category {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.article-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.article-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Article Detail */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-hero {
    position: relative;
    margin-bottom: 2rem;
}

.article-hero img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.article-header {
    margin-bottom: 2rem;
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--gray-500);
    font-size: 0.9375rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-content {
    font-size: 1.0625rem;
    line-height: 1.9;
}

.article-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gray-200);
}

.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    background: var(--gray-100);
    margin: 1.5rem 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

/* Tool Detail */
.tool-detail {
    max-width: 900px;
    margin: 0 auto;
}

.tool-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    padding: 3rem 0;
    margin-bottom: 2rem;
    border-radius: var(--radius-lg);
}

.tool-header h1 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.tool-header p {
    opacity: 0.9;
    margin-bottom: 0;
}

.tool-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

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

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

.form-hint {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

.form-result {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-top: 1.5rem;
}

.form-result h4 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.result-unit {
    font-size: 1rem;
    opacity: 0.9;
}

/* Features List */
.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--gray-100);
    border-radius: var(--radius-md);
}

.feature-item-icon {
    width: 32px;
    height: 32px;
    background: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1rem;
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1rem;
    margin: 0;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

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

.footer-section li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo:hover {
    color: var(--white);
    text-decoration: none;
}

/* Page Header (for inner pages) */
.page-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    padding: 3rem 0;
}

.page-header h1 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.page-header p {
    opacity: 0.9;
    margin-bottom: 0;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: rgba(255,255,255,0.8);
}

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

.breadcrumb span {
    color: rgba(255,255,255,0.6);
}

/* About Page */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    background: var(--gray-900);
    color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.contact-info h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    color: var(--white);
    margin: 0 0 0.25rem;
    font-size: 1rem;
}

.contact-item p {
    color: var(--gray-400);
    margin: 0;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--gray-600);
    font-size: 1rem;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--gray-100);
}

.faq-icon {
    transition: var(--transition);
}

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

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

.faq-answer p {
    margin: 0;
    color: var(--gray-600);
}

/* 404 Page */
.error-page {
    text-align: center;
    padding: 6rem 0;
}

.error-code {
    font-size: 8rem;
    font-weight: 900;
    color: var(--gray-200);
    line-height: 1;
    margin-bottom: 1rem;
}

.error-page h1 {
    margin-bottom: 1rem;
}

.error-page p {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

/* Legal Pages */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.legal-content h2 {
    margin-top: 2rem;
    font-size: 1.5rem;
}

.legal-content h3 {
    font-size: 1.25rem;
}

.legal-content p {
    margin-bottom: 1rem;
}

.legal-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    border-radius: var(--radius-md);
    background: var(--white);
    color: var(--gray-700);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.pagination a:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    text-decoration: none;
}

.pagination a.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: var(--gray-100);
    font-weight: 600;
    color: var(--gray-700);
}

tr:hover {
    background: var(--gray-50);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary { background: var(--primary); color: var(--white); }
.badge-secondary { background: var(--secondary); color: var(--white); }
.badge-success { background: var(--success); color: var(--white); }
.badge-warning { background: var(--warning); color: var(--white); }
.badge-danger { background: var(--danger); color: var(--white); }
.badge-info { background: var(--info); color: var(--white); }

/* Call to Action */
.cta {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.cta h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta p {
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-muted { color: var(--gray-500); }
.bg-primary { background: var(--primary); color: var(--white); }
.bg-secondary { background: var(--secondary); color: var(--white); }
.bg-light { background: var(--gray-100); }
.bg-dark { background: var(--gray-900); color: var(--white); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Responsive */
@media (max-width: 1024px) {
    .about-intro {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
    
    .hero h1 { font-size: 2.25rem; }
    .hero p { font-size: 1.125rem; }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
    }
    
    .nav.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .article-hero img {
        height: 250px;
    }