:root {
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-table-head: #f1f5f9;
    --bg-hover: #f8fafc;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.04);
    --radius: 8px;
    --badge-giant: #F97316;
    --badge-quickwin: #22C55E;
    --badge-critical: #EF4444;
    --badge-good: #3B82F6;
    --badge-watch: #9CA3AF;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --bg-card: #1e293b;
        --bg-table-head: #1e293b;
        --bg-hover: #263348;
        --border: #334155;
        --text: #f1f5f9;
        --text-muted: #94a3b8;
        --text-light: #64748b;
        --shadow: 0 1px 3px rgba(0,0,0,.3);
        --shadow-md: 0 4px 6px -1px rgba(0,0,0,.3);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

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

/* Layout */
.container { max-width: 1400px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.site-header .inner {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.site-header h1 {
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
}

.site-header h1 span {
    color: var(--text-muted);
    font-weight: 400;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    flex-wrap: wrap;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    overflow-x: auto;
    padding-bottom: 2px;
}

.tab-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    white-space: nowrap;
    transition: all .15s;
}

.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    line-height: 1;
    transition: all .15s;
    white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-days {
    background: transparent;
    border-color: var(--border);
    color: var(--text-muted);
}
.btn-days.active { background: var(--bg-table-head); border-color: var(--primary); color: var(--primary); font-weight: 600; }
.btn-days:hover { border-color: var(--primary); color: var(--primary); }

/* Main content */
main { padding: 20px 0 40px; }

/* Summary cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

@media (max-width: 900px) {
    .summary-cards { grid-template-columns: repeat(2, 1fr); }
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

.card-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 6px;
}

.card-value {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.1;
}

.card-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Table section */
.table-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.table-toolbar-title {
    font-weight: 600;
    font-size: 14px;
    margin-right: 4px;
}

.filter-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    background: var(--bg-table-head);
    color: var(--text-muted);
    transition: all .15s;
}

.filter-btn:hover, .filter-btn.active { color: #fff; }
.filter-btn[data-cat="all"].active    { background: var(--primary); border-color: var(--primary); }
.filter-btn[data-cat="giant"].active  { background: var(--badge-giant); border-color: var(--badge-giant); }
.filter-btn[data-cat="quickwin"].active { background: var(--badge-quickwin); border-color: var(--badge-quickwin); }
.filter-btn[data-cat="critical"].active { background: var(--badge-critical); border-color: var(--badge-critical); }
.filter-btn[data-cat="good"].active   { background: var(--badge-good); border-color: var(--badge-good); }
.filter-btn[data-cat="watch"].active  { background: var(--badge-watch); border-color: var(--badge-watch); }

.filter-btn[data-cat="giant"]:hover  { background: var(--badge-giant); border-color: var(--badge-giant); }
.filter-btn[data-cat="quickwin"]:hover { background: var(--badge-quickwin); border-color: var(--badge-quickwin); }
.filter-btn[data-cat="critical"]:hover { background: var(--badge-critical); border-color: var(--badge-critical); }
.filter-btn[data-cat="good"]:hover   { background: var(--badge-good); border-color: var(--badge-good); }
.filter-btn[data-cat="watch"]:hover  { background: var(--badge-watch); border-color: var(--badge-watch); }
.filter-btn[data-cat="all"]:hover    { background: var(--primary); border-color: var(--primary); }
.filter-btn[data-cat="winners"]:hover, .filter-btn[data-cat="winners"].active { background: var(--badge-quickwin); border-color: var(--badge-quickwin); }
.filter-btn[data-cat="losers"]:hover,  .filter-btn[data-cat="losers"].active  { background: var(--badge-critical); border-color: var(--badge-critical); }
.filter-btn[data-cat="new"]:hover,     .filter-btn[data-cat="new"].active     { background: var(--primary); border-color: var(--primary); }

.ml-auto { margin-left: auto; }

/* Table */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

thead th {
    background: var(--bg-table-head);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--text-muted);
    white-space: nowrap;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
}

thead th.sortable { cursor: pointer; user-select: none; }
thead th.sortable:hover { color: var(--primary); }
thead th .sort-icon { margin-left: 4px; opacity: .4; }
thead th.sort-asc .sort-icon::after  { content: ' ↑'; opacity: 1; }
thead th.sort-desc .sort-icon::after { content: ' ↓'; opacity: 1; }
thead th:not(.sort-asc):not(.sort-desc) .sort-icon::after { content: ' ↕'; }

tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background .1s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-hover); }

td { padding: 9px 12px; vertical-align: middle; }

.slug-cell {
    max-width: 320px;
    min-width: 180px;
}

.slug-text {
    display: inline-block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
    font-family: 'SF Mono', 'Fira Mono', monospace;
    font-size: 12px;
    color: var(--text);
}

.num { text-align: right; font-variant-numeric: tabular-nums; }
.actions-cell { white-space: nowrap; text-align: right; }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
    color: #fff;
}

.badge-giant    { background: var(--badge-giant); }
.badge-quickwin { background: var(--badge-quickwin); }
.badge-critical { background: var(--badge-critical); }
.badge-good     { background: var(--badge-good); }
.badge-watch    { background: var(--badge-watch); color: #fff; }

/* Keyword expand row */
.kw-row { background: var(--bg) !important; }
.kw-row:hover { background: var(--bg) !important; }
.kw-expand { border-top: 2px solid var(--primary); }

/* Loading / empty states */
.state-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    gap: 12px;
    text-align: center;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .7s linear infinite;
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #1e293b;
    color: #f1f5f9;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(8px);
    transition: all .2s;
    z-index: 999;
    pointer-events: none;
}

.toast.show { opacity: 1; transform: translateY(0); }

/* Settings page */
.page-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 0 16px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.page-header h1 { font-size: 20px; }

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    overflow: hidden;
}

.settings-card-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 14px;
}

.settings-card-body { padding: 20px; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: 12px; font-weight: 600; color: var(--text-muted); }

input[type="text"], input[type="url"], textarea, select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    transition: border-color .15s;
    width: 100%;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

textarea { resize: vertical; min-height: 60px; }

.toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.toggle input { display: none; }

.toggle-track {
    width: 36px;
    height: 20px;
    background: var(--border);
    border-radius: 20px;
    position: relative;
    transition: background .2s;
}

.toggle-track::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    top: 2px;
    left: 2px;
    transition: transform .2s;
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
}

.toggle input:checked + .toggle-track { background: var(--badge-quickwin); }
.toggle input:checked + .toggle-track::after { transform: translateX(16px); }

.sites-table-wrap { overflow-x: auto; }

.sites-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.sites-table th {
    padding: 10px 14px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
    border-bottom: 1px solid var(--border);
    background: var(--bg-table-head);
}

.sites-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.sites-table tr:last-child td { border-bottom: none; }

.status-ok   { color: var(--badge-quickwin); font-weight: 600; font-size: 12px; }
.status-miss { color: var(--badge-critical); font-weight: 600; font-size: 12px; }

.form-actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error   { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

@media (prefers-color-scheme: dark) {
    .alert-warning { background: #451a03; color: #fcd34d; border-color: #78350f; }
    .alert-success { background: #052e16; color: #86efac; border-color: #14532d; }
    .alert-error   { background: #450a0a; color: #fca5a5; border-color: #7f1d1d; }
}

.niche-preview {
    font-size: 12px;
    color: var(--text-muted);
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Responsive adjustments for 13" */
@media (max-width: 1280px) {
    .summary-cards { grid-template-columns: repeat(4, 1fr); }
    table { font-size: 12px; }
    td, thead th { padding: 8px 10px; }
    .slug-cell { max-width: 200px; }
}