/* ═══════════════════════════════════════════════════════════════
   AI Unlocked — main stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS variables (light theme) ───────────────────────────── */
:root {
    --bg:           #f4f6fb;
    --bg-card:      #ffffff;
    --bg-sidebar:   #ffffff;
    --bg-header:    rgba(255,255,255,.85);
    --text:         #1a1a2e;
    --text-muted:   #6b7280;
    --accent:       #6366f1;
    --accent-light: #818cf8;
    --border:       #e5e7eb;
    --shadow:       0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-lg:    0 10px 25px rgba(0,0,0,.08);
    --radius:       12px;
    --radius-sm:    8px;
    --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:    'JetBrains Mono', monospace;
    --transition:   .25s cubic-bezier(.4,0,.2,1);
    --header-h:     64px;
}

/* ── Dark theme ────────────────────────────────────────────── */
[data-theme="dark"] {
    --bg:           #0f1117;
    --bg-card:      #1a1d2e;
    --bg-sidebar:   #151825;
    --bg-header:    rgba(15,17,23,.9);
    --text:         #e2e8f0;
    --text-muted:   #94a3b8;
    --accent:       #818cf8;
    --accent-light: #a5b4fc;
    --border:       #2d3348;
    --shadow:       0 1px 3px rgba(0,0,0,.3);
    --shadow-lg:    0 10px 25px rgba(0,0,0,.4);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-light); }

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

.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ═══════════════════  HEADER  ═══════════════════════════════ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--header-h);
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--text);
    text-decoration: none;
    flex-shrink: 0;
}
.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}
.logo .accent { color: var(--accent); }

.tagline {
    color: var(--text-muted);
    font-size: .82rem;
    white-space: nowrap;
    flex-shrink: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

/* Search box */
.search-box {
    position: relative;
    width: 260px;
}
.search-box .search-icon {
    position: absolute;
    left: 12px; top: 50%;
    transform: translateY(-50%);
    width: 16px; height: 16px;
    color: var(--text-muted);
    pointer-events: none;
}
.search-box input {
    width: 100%;
    padding: 8px 14px 8px 36px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg);
    color: var(--text);
    font-size: .85rem;
    outline: none;
    transition: border var(--transition), box-shadow var(--transition);
}
.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 999px;
    border: none;
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.btn-icon {
    background: transparent;
    border: 1px solid var(--border);
    font-size: 1.1rem;
    padding: 6px 10px;
    border-radius: 50%;
    cursor: pointer;
    color: var(--text);
    transition: all var(--transition);
}
.btn-icon:hover { border-color: var(--accent); }

/* ═══════════════════  STATS BAR  ═══════════════════════════ */
.stats-bar {
    background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
    color: #fff;
    padding: 18px 0;
}

.stats-inner {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    font-family: var(--font-mono);
}
.stat-label {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    opacity: .85;
}

/* ═══════════════════  MAIN GRID  ═══════════════════════════ */
.main-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 32px;
    padding-top: 32px;
    padding-bottom: 64px;
    min-height: calc(100vh - var(--header-h) - 72px);
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.sidebar-title {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.category-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cat-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text);
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}
.cat-btn:hover { background: var(--bg); }
.cat-btn.active {
    background: var(--accent);
    color: #fff;
}
.cat-btn .cat-count {
    font-size: .72rem;
    font-weight: 700;
    background: rgba(255,255,255,.2);
    padding: 1px 7px;
    border-radius: 999px;
}
.cat-btn:not(.active) .cat-count {
    background: var(--bg);
    color: var(--text-muted);
}

/* ── Articles ────────────────────────────────────────────── */
.articles-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 20px;
}
.articles-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
}
.article-count {
    font-size: .82rem;
    color: var(--text-muted);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

/* ═══════════════════  CARD  ═══════════════════════════════ */
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    outline: none;
}
.article-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}
.article-card:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,.2);
}

/* Card image */
.card-image-wrap {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #3730a3 100%);
}
.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.article-card:hover .card-image {
    transform: scale(1.03);
}
.card-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #3730a3 100%);
}
.card-image-placeholder img {
    width: 60%;
    height: 60%;
    object-fit: contain;
    opacity: .85;
}

/* Card body */
.card-body {
    padding: 18px 20px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.badge {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    padding: 3px 10px;
    border-radius: 999px;
    color: #fff;
}

.card-date {
    font-size: .72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Company row */
.card-company {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.company-logo {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    object-fit: contain;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 2px;
    flex-shrink: 0;
}
.company-name {
    font-size: .76rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: .01em;
}

/* Title */
.card-title {
    font-size: 1.02rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Summary — collapsed by default */
.card-summary {
    font-size: .84rem;
    color: var(--text-muted);
    line-height: 1.65;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
    transition: all .3s ease;
}

/* Expanded card: show full summary */
.article-card.expanded .card-summary {
    -webkit-line-clamp: unset;
    line-clamp: unset;
    display: block;
}
.article-card.expanded {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg), 0 0 0 2px rgba(99,102,241,.12);
}

/* Footer */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-top: auto;
}

.card-expand-hint {
    font-size: .74rem;
    font-weight: 500;
    color: var(--accent);
    opacity: 0;
    transition: opacity var(--transition);
}
.article-card:hover .card-expand-hint,
.article-card:focus .card-expand-hint {
    opacity: 1;
}
.article-card.expanded .card-expand-hint {
    opacity: 0.7;
}

/* ── Skeleton loader ─────────────────────────────────────── */
.skeleton-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    height: 380px;
    position: relative;
    overflow: hidden;
}
.skeleton-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,.15) 50%, transparent 100%);
    animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ── Empty state ─────────────────────────────────────────── */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
}
.empty-icon { font-size: 3rem; display: block; margin-bottom: 12px; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 6px; }
.empty-state p { color: var(--text-muted); font-size: .9rem; }

/* ── Pagination ──────────────────────────────────────────── */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 36px;
}
.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.page-btn:disabled {
    opacity: .4;
    cursor: not-allowed;
}

/* ═══════════════════  FOOTER  ═══════════════════════════════ */
.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
}
.footer-inner p {
    font-size: .82rem;
    color: var(--text-muted);
    line-height: 1.7;
}
.footer-small {
    margin-top: 8px;
    font-size: .72rem;
    opacity: .6;
}

/* ═══════════════════  TRENDING TICKER  ══════════════════════ */
.trending-bar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    overflow: hidden;
}
.trending-inner {
    display: flex;
    align-items: center;
    gap: 14px;
}
.trending-label {
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--accent);
    white-space: nowrap;
    flex-shrink: 0;
}
.trending-scroll {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
}
.trending-scroll::-webkit-scrollbar { display: none; }
.trending-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--border);
    font-size: .75rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition);
}
.trending-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(99,102,241,.08);
}
.trending-tag .trend-count {
    font-size: .65rem;
    font-weight: 700;
    color: var(--accent);
    background: rgba(99,102,241,.12);
    padding: 1px 6px;
    border-radius: 999px;
}

/* ═══════════════════  SHARE BUTTONS  ════════════════════════ */
.card-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    flex-wrap: wrap;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    font-size: .68rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.share-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.share-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}
.listen-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    font-size: .68rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
}
.listen-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.listen-btn.playing {
    border-color: #ef4444;
    color: #ef4444;
}
.share-copied {
    font-size: .68rem;
    color: var(--accent);
    font-weight: 600;
    opacity: 0;
    transition: opacity .3s;
}
.share-copied.show { opacity: 1; }

/* ═══════════════════  RESPONSIVE  ═══════════════════════════ */
@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
    .category-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
    }
    .cat-btn { width: auto; }
}

@media (max-width: 768px) {
    .site-header { height: auto; padding: 10px 0; }
    .header-inner { flex-wrap: wrap; gap: 8px; }
    .logo { font-size: 1.15rem; gap: 8px; }
    .logo-icon { width: 30px; height: 30px; }
    .tagline { display: none; }
    .header-actions { width: 100%; order: 10; }
    .search-box { flex: 1; width: auto; }
    .stats-inner { gap: 24px; }
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .site-header { padding: 8px 0; }
    .container { padding: 0 14px; }
    .logo { font-size: 1.05rem; }
    .logo-icon { width: 26px; height: 26px; }
    .stat-value { font-size: 1.2rem; }
    .card-body { padding: 14px 16px 16px; }
}