/* =============================================
   ELSEVIER NEWS PORTAL - Main Stylesheet
   ============================================= */

:root {
    --color-primary: #e63946;
    --color-secondary: #1d3557;
    --color-accent: #457b9d;
    --color-dark: #0d1117;
    --color-light: #f1faee;
    --color-gray: #6c757d;
    --color-gray-light: #e9ecef;
    --color-white: #ffffff;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-border: #dee2e6;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-serif: Georgia, 'Times New Roman', Times, serif;
    --max-width: 1200px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-primary);
}

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

ul, ol {
    list-style: none;
}

/* =============================================
   LAYOUT
   ============================================= */

.site-wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* =============================================
   HEADER
   ============================================= */

.site-header {
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: var(--spacing-md);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
}

.site-logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: -0.5px;
}

.site-logo .logo-accent {
    color: var(--color-primary);
}

.main-nav {
    background: var(--color-secondary);
    margin: 0 calc(-1 * var(--spacing-md));
}

.main-nav ul {
    display: flex;
    flex-wrap: wrap;
}

.main-nav li {
    position: relative;
}

.main-nav a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Breaking News Ticker */
.breaking-news {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-sm) 0;
    overflow: hidden;
}

.breaking-news-inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.breaking-label {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    white-space: nowrap;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.breaking-ticker {
    overflow: hidden;
    flex: 1;
}

.ticker-content {
    display: flex;
    gap: var(--spacing-xl);
    animation: ticker 30s linear infinite;
    white-space: nowrap;
}

@keyframes ticker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.ticker-item {
    font-size: 0.9rem;
    white-space: nowrap;
}

.ticker-item a:hover {
    color: var(--color-primary);
}

/* =============================================
   HERO / SLIDER
   ============================================= */

.hero-slider {
    margin-bottom: var(--spacing-xl);
}

.hero-slide {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    aspect-ratio: 16/7;
    background: var(--color-dark);
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    padding: var(--spacing-xxl) var(--spacing-xl) var(--spacing-xl);
    color: var(--color-white);
}

.hero-category {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.hero-overlay h2 {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

.hero-overlay .hero-meta {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.8);
}

/* Hero thumbs */
.hero-thumbs {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.hero-thumb {
    flex: 1;
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    aspect-ratio: 16/9;
    cursor: pointer;
}

.hero-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.hero-thumb:hover img,
.hero-thumb.active img {
    opacity: 1;
}

.hero-thumb .thumb-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

/* =============================================
   SECTION HEADERS
   ============================================= */

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid var(--color-secondary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-secondary);
    letter-spacing: 0.5px;
}

.section-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 1.1em;
    background: var(--color-primary);
    margin-right: var(--spacing-sm);
    vertical-align: middle;
}

.section-link {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
}

.section-link:hover {
    text-decoration: underline;
}

/* =============================================
   ARTICLE CARDS
   ============================================= */

/* Grid layout */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.news-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.news-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.news-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Card */
.card {
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    position: relative;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-category {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 2px var(--spacing-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 2px;
}

.card-video-badge {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-video-badge::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 0 8px 14px;
    border-color: transparent transparent transparent var(--color-white);
    margin-left: 3px;
}

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.card-title a:hover {
    color: var(--color-primary);
}

.card-excerpt {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.card-meta .author {
    color: var(--color-primary);
    font-weight: 500;
}

/* Small card (horizontal) */
.card-small {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.card-small:last-child {
    border-bottom: none;
}

.card-small .card-image {
    width: 100px;
    min-width: 100px;
    aspect-ratio: 1;
    border-radius: 4px;
}

.card-small .card-body {
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-small .card-title {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* List item */
.card-list {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.card-list:last-child {
    border-bottom: none;
}

.card-list .card-title {
    font-size: 0.95rem;
}

/* =============================================
   TWO COLUMN LAYOUT
   ============================================= */

.two-column {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
}

.three-column {
    display: grid;
    grid-template-columns: 1fr 1fr 350px;
    gap: var(--spacing-lg);
}

/* =============================================
   SIDEBAR
   ============================================= */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.sidebar-widget {
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.sidebar-widget .widget-title {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.sidebar-widget .widget-body {
    padding: var(--spacing-md);
}

/* =============================================
   SHORT NEWS
   ============================================= */

.short-news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.short-news-item {
    background: var(--color-light);
    padding: var(--spacing-md);
    border-radius: 4px;
    border-left: 4px solid var(--color-primary);
}

.short-news-item .card-title {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.short-news-item .card-meta {
    font-size: 0.75rem;
}

/* =============================================
   COLUMNISTS
   ============================================= */

.columnists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.columnist-card {
    text-align: center;
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.columnist-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    overflow: hidden;
    background: var(--color-gray-light);
}

.columnist-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.columnist-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.columnist-bio {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* =============================================
   TRENDING NEWS
   ============================================= */

.trending-list {
    counter-reset: trending;
}

.trending-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    counter-increment: trending;
    position: relative;
    padding-left: 40px;
}

.trending-item::before {
    content: counter(trending, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
}

/* =============================================
   FOOTER
   ============================================= */

.site-footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0 0;
    margin-top: var(--spacing-xxl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-section h3 {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.footer-section p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-section ul li a:hover {
    color: var(--color-primary);
}

.footer-contact li {
    display: flex;
    gap: var(--spacing-sm);
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}

.footer-newsletter input[type="email"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.footer-newsletter input[type="email"]::placeholder {
    color: rgba(255,255,255,0.5);
}

.footer-newsletter button {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.footer-newsletter button:hover {
    background: #c1121f;
}

.footer-bottom {
    text-align: center;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

/* =============================================
   CONTACT FORM
   ============================================= */

.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: var(--font-sans);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #c1121f;
    color: var(--color-white);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 992px) {
    .two-column {
        grid-template-columns: 1fr;
    }

    .three-column {
        grid-template-columns: 1fr 1fr;
    }

    .news-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-nav ul {
        flex-wrap: wrap;
    }

    .main-nav a {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }

    .hero-overlay h2 {
        font-size: 1.3rem;
    }

    .hero-thumbs {
        flex-wrap: wrap;
    }

    .hero-thumb {
        flex: 0 0 calc(50% - var(--spacing-sm));
    }

    .news-grid,
    .news-grid-2,
    .news-grid-3,
    .news-grid-4 {
        grid-template-columns: 1fr;
    }

    .three-column {
        grid-template-columns: 1fr;
    }

    .columnists-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .header-top {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }

    .site-logo h1 {
        font-size: 1.5rem;
    }

    .hero-slide {
        aspect-ratio: 16/10;
    }

    .hero-overlay {
        padding: var(--spacing-md);
    }

    .hero-overlay h2 {
        font-size: 1.1rem;
    }

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