:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --badge-bg: #eff6ff;
    --badge-text: #1e40af;
    --disaster-red: #ef4444;
    --disaster-bg: #fef2f2;
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1240px;
    --header-height: 72px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 16px;
}

/* Sticky Glassmorphism Header */
.site-header {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.header-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.brand {
    text-align: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo a {
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 2px;
}

/* Mobile-First Navigation Bar */
.main-nav {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    padding: 2px 0;
}

.main-nav::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 8px;
    justify-content: center;
    width: max-content;
    margin: 0 auto;
    padding: 0 4px;
}

.main-nav button,
.main-nav a {
    background: #f1f5f9;
    border: 1px solid transparent;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 9999px;
    cursor: pointer;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    touch-action: manipulation;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav button:hover,
.main-nav a:hover {
    background-color: #e2e8f0;
    color: var(--text-primary);
}

.main-nav button.active,
.main-nav a.active {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* Main Content Area */
main.container {
    margin-top: 24px;
    margin-bottom: 48px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.25s ease-in-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.news-feed h2,
.dashboard-header h2 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.4px;
    margin-bottom: 6px;
}

.dashboard-header {
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-header p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Responsive Grid Layout */
.articles-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile default: 1 column */
    gap: 16px;
}

/* Article Cards */
.article-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
    transform: translateY(-2px);
    border-color: #cbd5e1;
    box-shadow: 0 12px 24px -4px rgba(15, 23, 42, 0.08);
}

.article-card:active {
    transform: scale(0.988);
}

/* Image Wrapper */
.article-image {
    width: 100%;
    height: 190px;
    overflow: hidden;
    background-color: #f1f5f9;
    flex-shrink: 0;
    position: relative;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.article-card:hover .article-image img {
    transform: scale(1.03);
}

.placeholder-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #334155 0%, #0f172a 100%);
    color: #94a3b8;
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: 1px;
    user-select: none;
}

/* Article Body */
.article-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
    font-size: 0.75rem;
}

.source-badge {
    font-weight: 700;
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 3px 8px;
    border-radius: 6px;
    letter-spacing: 0.3px;
    font-size: 0.725rem;
}

.category-badge {
    background-color: #f1f5f9;
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.725rem;
    font-weight: 600;
}

.article-content time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: auto;
}

.article-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
    letter-spacing: -0.2px;
}

.article-content h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.article-content h3 a:hover {
    color: var(--accent-color);
}

.article-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-top: 4px;
}

/* Disaster Specific Cards */
.disaster-card {
    border-left: 5px solid var(--disaster-red);
}

.disaster-badge {
    background-color: var(--disaster-bg);
    color: var(--disaster-red);
}

.magnitude-badge {
    background-color: #fee2e2;
    color: #991b1b;
    font-weight: 800;
}

/* Live Map Container */
.map-container {
    width: 100%;
    height: 480px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* Footer */
.site-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 40px;
}

.footer-info {
    margin-bottom: 8px;
}

.footer-bottom {
    font-size: 0.8rem;
    color: #94a3b8;
}

/* Tablet Layout (640px+) */
@media (min-width: 640px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .map-container {
        height: 550px;
    }
}

/* Desktop Layout (1024px+) */
@media (min-width: 1024px) {
    .header-container {
        flex-direction: row;
        justify-content: space-between;
    }

    .brand {
        text-align: left;
    }

    .main-nav {
        width: auto;
    }

    .main-nav ul {
        margin: 0;
    }

    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
}

/* Pagination Styling */
.pagination-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 36px;
    padding: 12px 0;
}

.page-btn {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    user-select: none;
}

.page-btn:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    color: var(--accent-color);
}

.page-btn.active {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-ellipsis {
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0 4px;
}