/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: var(--dark-color);
    line-height: 1.6;
}

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

/* ===== NAVBAR ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 20px 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.navbar-brand {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.navbar-brand h1 {
    font-size: 28px;
    margin: 0;
}

.navbar-brand h1 a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.navbar-brand h1 a:hover {
    opacity: 0.8;
}

.navbar-brand p {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

.navbar-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-link.admin-link {
    background-color: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.nav-link.admin-link:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
    margin-bottom: 60px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero p {
    font-size: 24px;
    opacity: 0.9;
}

/* ===== CATEGORIES SECTION ===== */
.categories-section {
    margin: 60px 0;
}

.categories-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--dark-color);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

/* ===== CATEGORY CARD ===== */
.category-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
}

.category-header {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
}

.category-icon {
    font-size: 40px;
    flex-shrink: 0;
}

.category-header h3 {
    font-size: 22px;
    color: var(--dark-color);
    margin: 0;
}

.subcategory-count {
    display: inline-block;
    background: var(--light-color);
    color: var(--gray-color);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    margin-top: 5px;
}

.category-description {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.subcategories {
    margin: 20px 0;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    flex-grow: 1;
}

.subcategories h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 14px;
}

.subcategories ul {
    list-style: none;
}

.subcategories li {
    margin-bottom: 8px;
}

.subcategories a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.subcategories a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.btn-read-more {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    font-weight: bold;
    margin-top: 20px;
}

.btn-read-more:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    background-color: #f0f0f0;
    padding: 20px 0;
    margin-bottom: 40px;
    border-bottom: 1px solid #ddd;
}

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

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

.breadcrumb a:last-of-type {
    color: var(--dark-color);
    font-weight: bold;
}

/* ===== CATEGORY DETAIL ===== */
.category-detail {
    margin: 60px 0;
}

.category-header-detail {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px;
    border-radius: var(--border-radius);
    margin-bottom: 40px;
}

.category-header-detail h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.category-header-detail p {
    font-size: 18px;
    opacity: 0.95;
}

/* ===== SUBCATEGORIES SECTION ===== */
.subcategories-section {
    margin: 40px 0;
}

.subcategories-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 28px;
}

.subcategories-list {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.subcategories-list ul {
    list-style: none;
}

.subcategories-list .level-1 li {
    margin-bottom: 15px;
}

.subcategories-list .level-1 > li > a {
    color: white;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    font-weight: bold;
}

.subcategories-list .level-1 > li > a:hover {
    transform: translateX(5px);
}

.subcategories-list .level-2 {
    margin-top: 10px;
    padding-left: 20px;
}

.subcategories-list .level-2 > li > a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 8px 0;
}

.subcategories-list .level-2 > li > a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.subcategories-list .level-3 {
    margin-top: 5px;
    padding-left: 20px;
}

.subcategories-list .level-3 > li > a {
    color: var(--gray-color);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 5px 0;
    font-size: 14px;
}

.subcategories-list .level-3 > li > a:hover {
    color: var(--primary-color);
}

/* ===== INFO BOX ===== */
.info-box {
    background-color: #e8f4f8;
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    border-radius: var(--border-radius);
    margin: 40px 0;
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.info-box p {
    color: #555;
    line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-top: 80px;
}

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

.footer p:last-child {
    opacity: 0.8;
    font-size: 14px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .navbar-menu {
        width: 100%;
        justify-content: center;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 18px;
    }

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

    .categories-section h2 {
        font-size: 28px;
    }

    .category-header-detail h1 {
        font-size: 32px;
    }

    .breadcrumb {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .navbar-brand h1 {
        font-size: 22px;
    }

    .hero {
        padding: 40px 20px;
    }

    .hero h1 {
        font-size: 24px;
    }

    .category-card {
        padding: 20px;
    }

    .subcategories-list {
        padding: 20px;
    }
}

/* ===== ANIMATION ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-card {
    animation: fadeIn 0.6s ease;
}

/* ===== PRINT STYLES ===== */
@media print {
    .navbar,
    .footer,
    .btn-read-more {
        display: none;
    }

    body {
        background: white;
    }

    .category-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}