:root {
    --color-primary: #1a4b8c;
    --color-primary-dark: #0f3460;
    --color-primary-light: #e8f0fa;
    --color-accent: #c62828;
    --color-text: #1a1a2e;
    --color-text-muted: #5a6270;
    --color-bg: #f5f7fa;
    --color-white: #ffffff;
    --color-border: #d8dee8;
    --color-success: #2e7d32;
    --shadow-sm: 0 1px 3px rgba(26, 75, 140, 0.08);
    --shadow-md: 0 4px 16px rgba(26, 75, 140, 0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    --max-width: 1200px;
    --header-height: 72px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.25rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Header */
.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
    gap: 1rem;
    flex-wrap: wrap;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.logo-wide {
    display: block;
    height: 40px;
    width: auto;
    max-width: min(220px, 55vw);
}

.logo-title {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-subtitle {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.lang-switcher {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    max-width: 360px;
    justify-content: flex-end;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-admin {
    padding: 0.5rem 1rem;
    background: var(--color-accent);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.875rem;
}

.profile-menu { position: relative; }

.profile-toggle {
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-white);
    cursor: pointer;
    font-size: 0.875rem;
}

.profile-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    min-width: 220px;
    box-shadow: var(--shadow-md);
    z-index: 200;
}

.profile-form label { display: block; margin-bottom: 0.75rem; font-size: 0.85rem; }
.profile-form input {
    display: block; width: 100%; margin-top: 0.25rem;
    padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius);
}

.profile-name { font-size: 0.875rem; color: var(--color-text-muted); margin-right: 0.5rem; }
.profile-link { font-size: 0.875rem; color: var(--color-primary); text-decoration: none; }

.login-notice {
    margin-top: 1rem; padding: 0.75rem 1rem; border-radius: var(--radius);
}
.login-notice.error { background: #ffebee; color: #c62828; }
.login-notice.success { background: #e8f5e9; color: #2e7d32; }

.lang-btn {
    padding: 0.35rem 0.5rem;
    font-size: 0.72rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--color-white);
    transition: all 0.2s;
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Main */
.site-main {
    flex: 1;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 3rem 0 3.5rem;
}

.hero-title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    max-width: 800px;
}

.hero-description {
    font-size: 1.05rem;
    opacity: 0.92;
    max-width: 680px;
    margin-bottom: 2rem;
}

.search-form {
    display: flex;
    gap: 0.5rem;
    max-width: 640px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 0.875rem 1.125rem;
    border: 2px solid transparent;
    border-radius: var(--radius);
    font-size: 1rem;
    outline: none;
}

.search-input:focus {
    border-color: var(--color-primary-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s, transform 0.1s;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn-primary:hover {
    background: #b71c1c;
}

.search-btn {
    min-width: 120px;
}

/* Sections */
.section {
    padding: 2.5rem 0;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 1.5rem;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

.category-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.category-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.category-icon {
    width: 48px;
    height: 48px;
    display: block;
    flex-shrink: 0;
}

.category-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.category-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Popular */
.popular-list {
    list-style: none;
    display: grid;
    gap: 0.75rem;
}

.popular-link {
    display: block;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.125rem 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.popular-link:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.popular-title {
    display: block;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.25rem;
}

.popular-excerpt {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Page header */
.page-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 0;
}

.page-title {
    font-size: clamp(1.375rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-top: 0.75rem;
}

.page-description {
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    max-width: 720px;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Article list */
.article-list {
    list-style: none;
    display: grid;
    gap: 1rem;
}

.article-card {
    display: block;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.article-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.article-card h2 {
    font-size: 1.125rem;
    color: var(--color-primary-dark);
    margin-bottom: 0.375rem;
}

.article-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.article-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary);
    margin-bottom: 0.375rem;
}

/* Article content */
.content-body {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 800px;
}

.content-body p {
    margin-bottom: 1rem;
}

.article-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.article-section:last-of-type {
    border-bottom: none;
}

.article-section h2 {
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    margin-bottom: 0.875rem;
}

.article-sources .sources-list {
    list-style: none;
    display: grid;
    gap: 1rem;
}

.article-sources .sources-list li {
    background: var(--color-primary-light);
    padding: 1rem;
    border-radius: var(--radius);
}

.source-meta {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0.25rem 0;
}

.article-generated-at {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 1rem;
}

.content-body p:last-child {
    margin-bottom: 0;
}

/* Error page */
.error-page {
    text-align: center;
    padding: 4rem 0;
}

.error-page h1 {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.error-page p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.empty-state {
    text-align: center;
    color: var(--color-text-muted);
    padding: 2rem;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

/* Footer */
.site-footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 2.5rem 0 1.5rem;
    margin-top: auto;
}

.footer-inner {
    display: grid;
    gap: 1.5rem;
}

.footer-brand strong {
    display: block;
    font-size: 1.125rem;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

.footer-copy {
    font-size: 0.8rem;
    opacity: 0.6;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-admin {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}

.footer-admin-user {
    font-size: 0.875rem;
    opacity: 0.9;
}

.footer-admin-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 0.875rem;
}

.footer-admin-link:hover {
    text-decoration: underline;
}

.footer-admin-panel {
    width: 100%;
    max-width: 320px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    padding: 1rem;
    margin-top: 0.25rem;
}

.footer-admin-form label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
}

.footer-admin-form input {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-text);
}

.footer-admin .btn-outline {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
    background: transparent;
}

.footer-admin .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* Responsive */
@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 0;
    }

    .hero {
        padding: 2rem 0 2.5rem;
    }

    .search-form {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
    }

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

    .content-body {
        padding: 1.25rem;
    }
}