:root {
    --bg-primary: #1d1d1d;
    --bg-secondary: #242424;
    --bg-surface: #2a2a2a;
    --bg-hover: #303030;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    --accent: #3584e4;
    --accent-hover: #4a9af5;
    --accent-dim: rgba(53, 132, 228, 0.15);
    --border: #404040;
    --border-dim: #303030;
    --success: #26a269;
    --warning: #cd9309;
    --error: #e01b24;
    --radius: 12px;
    --radius-sm: 6px;
}

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

body {
    font-family: 'Cantarell', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* Header */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-dim);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 15px;
}

.logo-icon {
    color: var(--accent);
}

nav {
    display: flex;
    gap: 4px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: background 0.15s, color 0.15s;
}

nav a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Hero */
.hero {
    text-align: center;
    padding: 48px 24px 32px;
    max-width: 480px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.hero p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 24px;
}

/* Search */
.search-box {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 10px 14px 10px 40px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
}

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

.search-box input::placeholder {
    color: var(--text-muted);
}

/* Filters */
.filters {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px 24px;
}

.filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
}

.filter-chips {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.chip {
    padding: 5px 12px;
    background: transparent;
    border: none;
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.chip:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.chip.active {
    background: var(--accent);
    color: var(--text-primary);
}

#sort-select {
    padding: 5px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

#sort-select:focus {
    border-color: var(--accent);
}

/* Extension Grid */
.extension-grid {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px 48px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 8px;
}

/* Extension Card */
.extension-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-dim);
    border-radius: var(--radius);
    padding: 18px;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.extension-card:hover {
    background: var(--bg-hover);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-version {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 100px;
    white-space: nowrap;
    flex-shrink: 0;
}

.card-description {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
    flex-grow: 1;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.card-meta .author {
    color: var(--text-secondary);
}

.card-meta .stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-meta svg {
    opacity: 0.5;
}

.card-tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.tag {
    font-size: 11px;
    padding: 2px 8px;
    background: var(--bg-primary);
    border-radius: 100px;
    color: var(--text-muted);
    font-weight: 500;
}

.card-install-count {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state h2 {
    margin-top: 12px;
    font-size: 16px;
    color: var(--text-secondary);
}

.empty-state p {
    margin-top: 4px;
    font-size: 14px;
}

/* Loading */
.loading {
    text-align: center;
    padding: 36px;
    color: var(--text-muted);
    grid-column: 1 / -1;
    font-size: 14px;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s, visibility 0.15s;
    padding: 24px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 520px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.97);
    transition: transform 0.15s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color 0.15s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content {
    padding: 24px;
}

.modal-content h2 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    padding-right: 28px;
}

.modal-content .version {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.modal-content .description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.modal-content .detail-section {
    margin-bottom: 16px;
}

.modal-content .detail-section h3 {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.modal-content .detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-dim);
    font-size: 13px;
}

.modal-content .detail-row:last-child {
    border-bottom: none;
}

.modal-content .detail-label {
    color: var(--text-muted);
}

.modal-content .detail-value {
    color: var(--text-primary);
}

.modal-content .detail-value a {
    color: var(--accent);
    text-decoration: none;
}

.modal-content .detail-value a:hover {
    text-decoration: underline;
}

.modal-content .extension-id-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-surface);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    border: 1px solid var(--border-dim);
}

.modal-content .extension-id-box code {
    flex: 1;
    font-family: 'Fira Code', 'Cascadia Code', monospace;
    font-size: 13px;
    color: var(--accent);
    word-break: break-all;
}

.modal-content .copy-btn {
    background: var(--accent);
    color: var(--text-primary);
    border: none;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
}

.modal-content .copy-btn:hover {
    background: var(--accent-hover);
}

.modal-content .copy-btn.copied {
    background: var(--success);
}

.modal-content .instructions {
    background: var(--bg-surface);
    padding: 14px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    border: 1px solid var(--border-dim);
}

.modal-content .instructions ol {
    padding-left: 18px;
    margin: 6px 0;
}

.modal-content .instructions li {
    margin-bottom: 2px;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-dim);
    padding: 24px;
    margin-top: auto;
}

.footer-inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}

.footer-inner a {
    color: var(--accent);
    text-decoration: none;
}

.footer-inner a:hover {
    text-decoration: underline;
}

.footer-inner p {
    margin-bottom: 2px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 24px;
    }

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

    .filter-row {
        flex-direction: column;
        align-items: flex-start;
    }

    nav {
        gap: 0;
    }
}