/* ========================================
   Global Styles & Variables
   ======================================== */
:root {
    --color-primary: #2C3E50;
    --color-secondary: #E8E8E8;
    --color-accent: #C9A063;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #FAFAFA;
    --color-white: #FFFFFF;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

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

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

/* ========================================
   Layout Containers
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 100px 0 80px;
    text-align: center;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========================================
   Main Content
   ======================================== */
.main {
    padding: 80px 0;
}

.articles-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
    gap: 20px;
}

.section-title {
    font-size: 2rem;
    color: var(--color-primary);
}

/* ========================================
   Search Box
   ======================================== */
.search-box {
    position: relative;
}

.search-input {
    padding: 12px 20px;
    border: 2px solid var(--color-secondary);
    border-radius: 50px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    width: 280px;
    transition: var(--transition);
    outline: none;
}

.search-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(201, 160, 99, 0.1);
}

/* ========================================
   Articles Grid
   ======================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

.article-card {
    background-color: var(--color-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    animation: fadeInUp 0.5s ease;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 3rem;
    font-family: var(--font-heading);
}

.article-content {
    padding: 24px;
}

.article-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.article-title {
    font-size: 1.35rem;
    margin-bottom: 12px;
    color: var(--color-primary);
    line-height: 1.4;
}

.article-excerpt {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
    padding-top: 16px;
    border-top: 1px solid var(--color-secondary);
}

.article-date {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-readtime {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ========================================
   Pagination
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 48px;
}

.pagination button {
    padding: 10px 20px;
    border: 2px solid var(--color-secondary);
    background-color: var(--color-white);
    color: var(--color-text);
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.pagination button:hover:not(:disabled) {
    border-color: var(--color-accent);
    background-color: var(--color-accent);
    color: var(--color-white);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination .page-info {
    font-size: 0.95rem;
    color: var(--color-text-light);
    padding: 0 12px;
}

/* ========================================
   Article Detail Page
   ======================================== */
.article-main {
    padding: 60px 0 80px;
    min-height: calc(100vh - 200px);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-light);
    font-weight: 500;
    margin-bottom: 32px;
    padding: 8px 0;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--color-accent);
    transform: translateX(-4px);
}

.article {
    background-color: var(--color-white);
    padding: 48px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 64px;
}

.article-header {
    margin-bottom: 40px;
    text-align: center;
    border-bottom: 2px solid var(--color-secondary);
    padding-bottom: 32px;
}

.article-header .article-category {
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.article-header .article-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.3;
}

.article-header .article-meta {
    justify-content: center;
    gap: 24px;
    border: none;
    padding: 0;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--color-text);
}

.article-body p {
    margin-bottom: 24px;
}

.article-body h2,
.article-body h3,
.article-body h4 {
    margin-top: 40px;
    margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
    margin-bottom: 24px;
    padding-left: 28px;
}

.article-body li {
    margin-bottom: 12px;
}

.article-body blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: 24px;
    margin: 32px 0;
    font-style: italic;
    color: var(--color-text-light);
}

/* ========================================
   Related Articles
   ======================================== */
.related-section {
    margin-top: 64px;
}

.related-section .section-title {
    margin-bottom: 32px;
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.related-card {
    background-color: var(--color-white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.related-card .article-title {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.related-card .article-excerpt {
    font-size: 0.9rem;
    -webkit-line-clamp: 2;
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    background-color: var(--color-white);
    padding: 80px 0;
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.about-content .section-title {
    margin-bottom: 24px;
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 40px 0;
    text-align: center;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.social-links {
    display: flex;
    gap: 24px;
}

.social-link {
    color: var(--color-white);
    font-weight: 500;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--color-accent);
}

/* ========================================
   Loading & Empty States
   ======================================== */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-light);
    font-size: 1.1rem;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-light);
}

.empty-state h3 {
    margin-bottom: 12px;
    color: var(--color-text);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .articles-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .search-input {
        width: 100%;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 32px 24px;
        box-shadow: var(--shadow-md);
        transition: left 0.3s ease;
        gap: 16px;
    }

    .nav-menu.active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .article {
        padding: 32px 24px;
    }

    .article-header .article-title {
        font-size: 1.8rem;
    }

    .article-body {
        font-size: 1rem;
    }

    .footer .container {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .hero {
        padding: 60px 0 50px;
    }

    .main {
        padding: 50px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }
}