/* ========== Base & Variables ========== */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #d97706;
    --accent-hover: #b45309;
    --border: #334155;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

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

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

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

/* ========== Navbar ========== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand a { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); }

.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--text-secondary); font-size: 0.9rem; }
.nav-links a:hover { color: var(--text-primary); }

/* ========== Flash ========== */
.flash-container { max-width: 1200px; margin: 1rem auto; padding: 0 1rem; }
.flash { padding: 0.75rem 1rem; border-radius: 6px; margin-bottom: 0.5rem; }
.flash-success { background: rgba(16,185,129,0.1); border: 1px solid var(--success); color: var(--success); }
.flash-danger { background: rgba(239,68,68,0.1); border: 1px solid var(--danger); color: var(--danger); }
.flash-warning { background: rgba(245,158,11,0.1); border: 1px solid var(--warning); color: var(--warning); }
.flash-info { background: rgba(59,130,246,0.1); border: 1px solid #3b82f6; color: #3b82f6; }

/* ========== Main ========== */
main { flex: 1; max-width: 1200px; width: 100%; margin: 0 auto; padding: 2rem 1rem; }

/* ========== Hero ========== */
.hero { text-align: center; padding: 3rem 1rem; }
.hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.hero p { color: var(--text-secondary); margin-bottom: 2rem; }

.search-form { display: flex; max-width: 500px; margin: 0 auto; gap: 0.5rem; }
.search-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}
.search-form button {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 6px;
    background: var(--accent);
    color: white;
    cursor: pointer;
}

/* ========== Sections ========== */
section { margin-bottom: 3rem; }
section h2 { font-size: 1.25rem; margin-bottom: 1.25rem; color: var(--text-secondary); }

/* ========== Categories ========== */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; }
.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}
.category-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.cat-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.cat-name { font-size: 0.9rem; color: var(--text-secondary); }

/* ========== Resource Cards ========== */
.resource-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.25rem; }
.resource-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.2s;
}
.resource-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.card-cover { height: 140px; overflow: hidden; background: var(--bg-primary); display: flex; align-items: center; justify-content: center; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; }
.cover-placeholder { font-size: 3rem; color: var(--text-muted); }
.cover-placeholder.large { font-size: 5rem; }

.card-body { padding: 1rem; }
.card-body h3 { font-size: 1rem; margin-bottom: 0.5rem; color: var(--text-primary); }
.card-summary { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.75rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.card-meta { display: flex; justify-content: space-between; align-items: center; }
.price { font-weight: 700; color: var(--accent); }
.price.free { color: var(--success); }
.price.original { text-decoration: line-through; color: var(--text-muted); font-weight: 400; font-size: 0.85rem; }
.sales { font-size: 0.75rem; color: var(--text-muted); }

/* List card variant */
.list-card { display: flex; flex-direction: row; }
.list-card .card-cover.small { width: 120px; height: auto; flex-shrink: 0; }
.list-card .card-body { flex: 1; }

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}
.btn:hover { background: var(--bg-hover); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-large { padding: 0.75rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.25rem 0.75rem; font-size: 0.75rem; }
.btn-success { background: var(--success); border-color: var(--success); color: white; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: white; }
.btn-secondary { background: var(--bg-hover); border-color: var(--border); }

/* ========== Forms ========== */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.25rem; font-size: 0.85rem; color: var(--text-secondary); }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
}
.form-group input[type="file"] { padding: 0.35rem; }
.form-group input[type="checkbox"] { width: auto; margin-right: 0.5rem; }

.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.form-actions { display: flex; gap: 0.75rem; margin-top: 1.5rem; align-items: center; }

/* ========== Auth ========== */
.auth-page { max-width: 400px; margin: 3rem auto; }
.auth-form { background: var(--bg-card); padding: 2rem; border-radius: 8px; border: 1px solid var(--border); }
.auth-link { text-align: center; margin-top: 1rem; font-size: 0.85rem; color: var(--text-secondary); }

/* ========== Detail Page ========== */
.detail-page { margin-bottom: 2rem; }
.detail-header { display: grid; grid-template-columns: 280px 1fr; gap: 2rem; margin-bottom: 2rem; }
@media (max-width: 768px) { .detail-header { grid-template-columns: 1fr; } }

.detail-cover { border-radius: 8px; overflow: hidden; background: var(--bg-secondary); }
.detail-info h1 { font-size: 1.5rem; margin-bottom: 0.75rem; }
.summary { color: var(--text-secondary); margin-bottom: 1rem; }

.meta-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.tag {
    padding: 0.25rem 0.6rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.tag-item { display: inline-block; margin: 0.25rem; padding: 0.3rem 0.6rem; background: var(--bg-secondary); border-radius: 4px; font-size: 0.8rem; }

.price-box { margin: 1.25rem 0; }
.price-box .current { font-size: 1.5rem; font-weight: 700; color: var(--accent); }

.action-btns { display: flex; gap: 0.75rem; }

.detail-preview, .detail-desc, .detail-tags { background: var(--bg-card); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border); margin-bottom: 1.5rem; }
.detail-preview h2, .detail-desc h2, .detail-tags h2 { margin-bottom: 1rem; font-size: 1.1rem; }
.preview-box, .desc-content { color: var(--text-secondary); font-size: 0.9rem; white-space: pre-wrap; }

/* ========== Buy Page ========== */
.buy-page { max-width: 600px; margin: 0 auto; }
.buy-card { background: var(--bg-card); padding: 2rem; border-radius: 8px; border: 1px solid var(--border); }
.buy-item { border-bottom: 1px solid var(--border); padding-bottom: 1rem; margin-bottom: 1rem; }
.buy-item h2 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.buy-price { display: flex; align-items: baseline; gap: 0.5rem; margin-bottom: 1.5rem; }
.buy-price .label { color: var(--text-secondary); }
.buy-price .amount { font-size: 1.5rem; font-weight: 700; color: var(--accent); }

.order-info { margin-bottom: 1.5rem; }
.order-info p { margin-bottom: 0.5rem; }
.highlight { color: var(--accent); font-weight: 700; }
.match-code { font-size: 1.25rem; font-weight: 700; color: var(--success); letter-spacing: 2px; }
.expiry { color: var(--warning); font-size: 0.85rem; }

.qr-section { text-align: center; margin: 1.5rem 0; padding: 1.5rem; background: var(--bg-primary); border-radius: 8px; }
.qr-code { max-width: 240px; border-radius: 8px; }
.qr-hint { margin-top: 0.75rem; color: var(--text-secondary); font-size: 0.85rem; }

.confirm-form { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.confirm-form h3 { margin-bottom: 1rem; font-size: 1rem; }

/* ========== Download ========== */
.download-page { max-width: 600px; margin: 0 auto; text-align: center; }
.download-card { background: var(--bg-card); padding: 2rem; border-radius: 8px; border: 1px solid var(--border); }
.netdisk-info { margin: 1.5rem 0; }
.netdisk-info a { display: inline-block; margin: 0.5rem 0; word-break: break-all; }

/* ========== Profile ========== */
.profile-page { max-width: 900px; margin: 0 auto; }
.profile-info { background: var(--bg-card); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border); margin-bottom: 1.5rem; }
.profile-info p { margin-bottom: 0.5rem; }
.badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.75rem; background: var(--bg-secondary); }
.badge.vip { background: var(--accent); color: white; }
.profile-links { display: flex; gap: 0.75rem; margin-bottom: 2rem; }

/* ========== Admin ========== */
.admin-page { max-width: 1200px; }
.admin-nav { display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.admin-nav a { padding: 0.5rem 1rem; border-radius: 6px; background: var(--bg-secondary); color: var(--text-secondary); font-size: 0.85rem; }
.admin-nav a.active { background: var(--accent); color: white; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: var(--bg-card); padding: 1.25rem; border-radius: 8px; border: 1px solid var(--border); text-align: center; }
.stat-number { font-size: 1.5rem; font-weight: 700; color: var(--accent); margin-bottom: 0.25rem; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.data-table th { text-align: left; padding: 0.75rem; border-bottom: 1px solid var(--border); color: var(--text-muted); font-weight: 500; }
.data-table td { padding: 0.75rem; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
.data-table tr:hover td { background: var(--bg-hover); }
.data-table a { margin-right: 0.5rem; }

.table-wrap { overflow-x: auto; background: var(--bg-card); border-radius: 8px; border: 1px solid var(--border); }

.inline-form { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; align-items: end; }
.inline-form input, .inline-form select { width: auto; min-width: 140px; }

.filter-bar { display: flex; gap: 0.5rem; margin-bottom: 1rem; }

.pagination { display: flex; justify-content: center; align-items: center; gap: 1rem; margin-top: 1.5rem; }
.pagination span { color: var(--text-muted); font-size: 0.85rem; }

.edit-form { max-width: 800px; background: var(--bg-card); padding: 2rem; border-radius: 8px; border: 1px solid var(--border); }

.empty { text-align: center; padding: 3rem; color: var(--text-muted); }
.alert { padding: 1rem; border-radius: 6px; margin: 1rem 0; }
.alert-warning { background: rgba(245,158,11,0.1); border: 1px solid var(--warning); color: var(--warning); }

.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 1.5rem; }

/* ========== Footer ========== */
.footer { text-align: center; padding: 2rem; color: var(--text-muted); font-size: 0.8rem; border-top: 1px solid var(--border); margin-top: auto; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .navbar { padding: 1rem; flex-direction: column; gap: 0.75rem; }
    .nav-links { gap: 1rem; }
    .resource-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
    .category-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
    .detail-header { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .list-card { flex-direction: column; }
    .list-card .card-cover.small { width: 100%; height: 140px; }
}
/* ========== V2.0 Additions ========== */

/* Search Hero */
.search-hero {
    text-align: center;
    padding: 4rem 1rem 2rem;
    max-width: 680px;
    margin: 0 auto;
}
.search-hero.slim {
    padding: 2rem 1rem 1rem;
}
.hero-search-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-secondary);
    transition: border-color 0.2s;
}
.hero-search-form:focus-within {
    border-color: var(--accent);
}
.hero-search-form input {
    flex: 1;
    padding: 1rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.05rem;
    outline: none;
}
.hero-search-form button {
    padding: 0 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}
.hero-search-form button:hover {
    color: var(--accent);
}

/* Hot Tags */
.hot-tags {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    align-items: center;
}
.hot-tags.center {
    justify-content: center;
}
.tag-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-right: 0.25rem;
}
.tag-pill {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.tag-pill:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

/* Section Blocks */
.section-block {
    margin-bottom: 3rem;
}
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}
.section-header h2 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
}
.more-link {
    font-size: 0.85rem;
    color: var(--accent);
}

/* Horizontal Scroll Cards */
.horizontal-scroll {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.horizontal-scroll::-webkit-scrollbar {
    height: 6px;
}
.horizontal-scroll::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
.scroll-card {
    flex: 0 0 160px;
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s;
}
.scroll-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}
.scroll-cover {
    height: 110px;
    overflow: hidden;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}
.scroll-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.scroll-info {
    padding: 0.75rem;
}
.scroll-info h4 {
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.scroll-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
}
.scroll-meta .price {
    font-weight: 700;
    color: var(--accent);
}
.scroll-meta .sales {
    color: var(--text-muted);
}

/* Category Tags (compact) */
.category-section {
    padding-bottom: 2rem;
}
.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.category-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
    transition: all 0.2s;
}
.category-tag:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}
.category-tag .tag-name {
    color: var(--text-primary);
}
.category-tag .tag-count {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Search Page */
.empty-search {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}
.empty-search-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.result-count {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}
.empty-hint {
    margin-top: 0.5rem;
    font-size: 0.85rem;
}

/* List Card Meta Tags */
.meta-tags {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}
.meta-tags .tag {
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
}

/* AI Generate Box */
.ai-generate-box {
    background: rgba(217,119,6,0.05);
    border: 1px dashed var(--accent);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
}

/* Payment note on QR */
.qr-note {
    margin-top: 0.5rem;
    color: var(--warning);
    font-size: 0.85rem;
}

/* Form range slider */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-hover);
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

/* Responsive tweaks */
@media (max-width: 768px) {
    .search-hero {
        padding: 2.5rem 1rem 1.5rem;
    }
    .hero-search-form input {
        padding: 0.85rem 1rem;
        font-size: 1rem;
    }
    .scroll-card {
        flex: 0 0 140px;
    }
}