/* Skill Store — Dark Theme */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-card-hover: #1f2d41;
    --border: #2a3a4e;
    --text-primary: #e8edf2;
    --text-secondary: #8b9db5;
    --text-muted: #5c6f87;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --max-width: 1280px;
}

[data-theme="light"] {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f4f8;
    --border: #dde3ea;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #8899aa;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
}

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

body, header, main, footer, .navbar, .hero, .card, .skillhub-banner,
input, button, a, .category-filter a, .theme-toggle, .time-tag {
    transition: background-color 0.5s ease, color 0.5s ease,
                border-color 0.5s ease, box-shadow 0.5s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.navbar .logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar .logo .icon { font-size: 1.5rem; }

.navbar nav { display: flex; gap: 0.25rem; }

.navbar nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.navbar nav a:hover,
.navbar nav a.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.navbar .skillhub-link {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.navbar .skillhub-link:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
    margin-left: auto;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent);
}

[data-theme="light"] .theme-toggle {
    background: #fef3c7;
    border-color: #f59e0b;
    box-shadow: 0 0 10px rgba(245,158,11,0.3);
}

/* Main Content */
main {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

.hero .stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.hero .stats .stat {
    text-align: center;
}

.hero .stats .stat .num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
}

.hero .stats .stat .label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-outline:hover {
    background: var(--accent-glow);
}

/* Category Filter */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.category-filter a {
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    text-decoration: none;
    transition: all 0.2s;
}

.category-filter a:hover,
.category-filter a.active {
    color: var(--text-primary);
    background: var(--accent);
    border-color: var(--accent);
}

/* Skill Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.25s;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.card .card-icon {
    font-size: 2rem;
    width: 48px;
    height: 48px;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card .card-title {
    font-weight: 700;
    font-size: 1.05rem;
}

.card .card-badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    white-space: nowrap;
}

.card .card-badge.p1 {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

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

.card .card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.card .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Section Headers */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title .count {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Job Pack Categories (job-packs page) */
.job-cat-block {
    margin-bottom: 2.5rem;
}

.job-cat-block h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

/* Recommendation banners */
.skillhub-banner {
    background: linear-gradient(135deg, #1e3a5f 0%, #162a4a 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 3rem 0;
    text-align: center;
}

[data-theme="light"] .skillhub-banner {
    background: linear-gradient(135deg, #e8f0fe 0%, #dce8fa 100%);
}

.skillhub-banner h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.skillhub-banner p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

[data-theme="light"] .skillhub-banner p {
    color: #4a5568;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover { color: var(--accent); }

/* Search bar */
.search-box {
    max-width: 400px;
    margin: 0 auto 2rem;
}

.search-box input {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: var(--accent);
}

/* Page header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.page-header p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Time tag */
.time-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background: rgba(59,130,246,0.1);
    color: var(--accent);
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
    main { padding: 1rem; }
    .hero h1 { font-size: 1.8rem; }
    .cards-grid { grid-template-columns: 1fr; }
    .navbar { padding: 0 1rem; }
    .navbar nav a { padding: 0.5rem 0.6rem; font-size: 0.82rem; }
    .hero .stats { gap: 1rem; }
    .rec-grid { grid-template-columns: 1fr !important; }
}