/* ==========================================================================
   SurplusArticle - Core Design System & Styling
   ========================================================================== */

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent: #f59e0b;
    --text-heading: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-dark: #0f172a;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-body);
    line-height: 1.65;
    font-size: 15px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul, ol {
    list-style: none;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Top Bar */
.top-bar {
    background: #0f172a;
    color: #94a3b8;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}
.top-trending-tag {
    background: #ef4444;
    color: #fff;
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}
.top-socials {
    display: flex;
    gap: 12px;
}
.top-socials a:hover {
    color: #fff;
}

.site-header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.6px;
    color: var(--text-heading);
}
.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 22px;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}
.brand-logo span {
    color: var(--primary);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-link {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text-heading);
    position: relative;
    padding: 6px 0;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}
.search-btn, .mobile-menu-toggle {
    background: #f1f5f9;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-heading);
    font-size: 18px;
    transition: var(--transition);
}
.search-btn:hover, .mobile-menu-toggle:hover {
    background: #e2e8f0;
    color: var(--primary);
}
.mobile-menu-toggle {
    display: none;
}

.btn-header-admin {
    padding: 8px 16px;
    background: #0f172a;
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-header-admin:hover {
    background: var(--primary);
}

/* Category Sub-Navigation Ribbon */
.category-ribbon {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    overflow-x: auto;
}
.category-ribbon-inner {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}
.cat-pill {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    background: #f1f5f9;
    color: var(--text-body);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.cat-pill:hover, .cat-pill.active {
    background: var(--primary);
    color: #fff;
}

/* Hero Section */
.hero-section {
    padding: 32px 0 24px;
}
.hero-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 480px;
    background: #0f172a;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: flex-end;
}
.hero-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.65;
    transition: transform 0.6s ease;
}
.hero-card:hover .hero-image {
    transform: scale(1.03);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0) 10%, rgba(15, 23, 42, 0.95) 90%);
}
.hero-content {
    position: relative;
    z-index: 10;
    padding: 40px;
    max-width: 820px;
}
.badge-category {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #fff;
    margin-bottom: 14px;
}
.hero-title {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 14px;
}
.hero-excerpt {
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.meta-row {
    display: flex;
    align-items: center;
    gap: 16px;
    color: #94a3b8;
    font-size: 13.5px;
}
.meta-author {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-weight: 600;
}
.meta-avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

/* Main Grid Layout */
.main-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    padding: 32px 0 60px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}
.section-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--primary);
    border-radius: 2px;
}

/* Articles Feed & Cards */
.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}
.article-thumb-wrapper {
    position: relative;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    overflow: hidden;
    background: #e2e8f0;
}
.article-thumb {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.article-card:hover .article-thumb {
    transform: scale(1.05);
}
.article-cat-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 5;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.article-body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
.article-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.35;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-card:hover .article-title {
    color: var(--primary);
}
.article-desc {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.55;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}
.article-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
    font-size: 12.5px;
    color: var(--text-muted);
}
.author-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-heading);
}
.author-pill img {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
}

/* Sidebar Components */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.sidebar-widget {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}
.widget-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Search Box */
.search-form {
    position: relative;
}
.search-input {
    width: 100%;
    padding: 12px 44px 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #f8fafc;
    color: var(--text-heading);
    outline: none;
    transition: var(--transition);
}
.search-input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.search-submit {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 6px;
}
.search-submit:hover {
    color: var(--primary);
}

/* Trending List */
.trending-item {
    display: flex;
    gap: 14px;
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid #f1f5f9;
}
.trending-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}
.trending-num {
    font-size: 20px;
    font-weight: 800;
    color: #cbd5e1;
    line-height: 1;
    min-width: 24px;
}
.trending-body {
    flex-grow: 1;
}
.trending-item-title {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-heading);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}
.trending-item:hover .trending-item-title {
    color: var(--primary);
}
.trending-item-meta {
    font-size: 12px;
    color: var(--text-muted);
}

/* Categories List in Sidebar */
.cat-item-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-heading);
}
.cat-item-link:last-child { border-bottom: none; }
.cat-item-link:hover { color: var(--primary); padding-left: 4px; }
.cat-count {
    background: #f1f5f9;
    color: var(--text-muted);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

/* Newsletter Widget */
.newsletter-card {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
}
.nl-icon {
    font-size: 32px;
    color: #60a5fa;
    margin-bottom: 12px;
}
.nl-title {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 8px;
}
.nl-desc {
    color: #94a3b8;
    font-size: 13.5px;
    line-height: 1.5;
    margin-bottom: 18px;
}
.nl-form input {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid #334155;
    background: #0f172a;
    color: #fff;
    margin-bottom: 10px;
    outline: none;
}
.nl-form input:focus {
    border-color: var(--primary);
}
.nl-btn {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}
.nl-btn:hover {
    background: var(--primary-hover);
}

/* Single Article Reader */
.article-header {
    margin-bottom: 28px;
}
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.breadcrumbs a:hover { color: var(--primary); }
.single-title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.single-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 28px;
}
.author-detail {
    display: flex;
    align-items: center;
    gap: 12px;
}
.author-detail-img {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    object-fit: cover;
}
.author-name {
    font-weight: 700;
    color: var(--text-heading);
    font-size: 15px;
}
.publish-info {
    font-size: 13px;
    color: var(--text-muted);
}
.reading-stats {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 13.5px;
}

.single-featured-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 32px;
    box-shadow: var(--shadow-md);
}
.single-featured-img img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
}

/* Article Typography */
.article-content {
    font-size: 17px;
    line-height: 1.8;
    color: #27272a;
}
.article-content p {
    margin-bottom: 24px;
}
.article-content h2 {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-heading);
    margin: 40px 0 16px;
    letter-spacing: -0.4px;
}
.article-content h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--text-heading);
    margin: 32px 0 14px;
}
.article-content ul, .article-content ol {
    margin: 0 0 24px 24px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
    margin-bottom: 10px;
}
.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 16px 24px;
    margin: 32px 0;
    background: #f1f5f9;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: #1e293b;
    font-size: 18px;
}

/* Tags Box */
.article-tags-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 36px 0;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.tag-badge {
    padding: 6px 14px;
    background: #f1f5f9;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-body);
}
.tag-badge:hover {
    background: var(--primary);
    color: #fff;
}

/* Author Box */
.author-card-box {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    gap: 20px;
    align-items: center;
    margin-bottom: 40px;
}
.author-card-img {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-full);
    object-fit: cover;
    flex-shrink: 0;
}
.author-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 6px;
}
.author-card-bio {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Comments Section */
.comments-section {
    margin-top: 48px;
}
.comments-title {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 24px;
}
.comment-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 16px;
}
.comment-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
}
.comment-author {
    font-weight: 700;
    color: var(--text-heading);
}
.comment-date { color: var(--text-muted); }
.comment-text { font-size: 14.5px; color: var(--text-body); line-height: 1.6; }

.comment-form {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 32px;
}
.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    background: #f8fafc;
    transition: var(--transition);
}
.form-control:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
textarea.form-control {
    min-height: 120px;
    resize: vertical;
    margin-bottom: 16px;
}
.btn-primary {
    padding: 12px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* Footer */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    margin-top: auto;
    padding-top: 60px;
    border-top: 1px solid #1e293b;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
}
.footer-brand {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.footer-desc {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
}
.footer-heading {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    font-size: 14px;
    color: #94a3b8;
}
.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-bottom {
    background: #090d16;
    padding: 20px 0;
    border-top: 1px solid #1e293b;
    font-size: 13px;
    text-align: center;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero-card {
        height: 400px;
    }
    .hero-title {
        font-size: 26px;
    }
}

@media (max-width: 768px) {
    .top-bar { display: none; }
    .main-nav { display: none; }
    .mobile-menu-toggle { display: flex; }
    .article-grid { grid-template-columns: 1fr; }
    .form-grid-2 { grid-template-columns: 1fr; }
    .single-title { font-size: 26px; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-card { height: 360px; }
    .hero-content { padding: 24px; }
}