/* ============================================================================
   Used Car Dashboard — design system
   Themes set CSS custom properties; layout classes consume them.
   ========================================================================== */

/* ---------- Theme palettes ---------- */
.theme-midnight {
    --bg: #0a1622;
    --surface: #12283a;
    --surface-2: #0e2030;
    --text: #dfe9f0;
    --muted: #8aa0b2;
    --accent: #36a899;
    --accent-2: #b06ab3;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: rgba(0, 0, 0, 0.35);
}
.theme-slate {
    --bg: #15181d;
    --surface: #1e232b;
    --surface-2: #191d24;
    --text: #e8eaed;
    --muted: #9aa3ad;
    --accent: #f5a623;
    --accent-2: #4aa3df;
    --border: rgba(255, 255, 255, 0.07);
    --shadow: rgba(0, 0, 0, 0.4);
}
.theme-aurora {
    --bg: #0d0b1f;
    --surface: #181435;
    --surface-2: #120f28;
    --text: #e9e6ff;
    --muted: #9c96c7;
    --accent: #22d3ee;
    --accent-2: #e879f9;
    --border: rgba(255, 255, 255, 0.09);
    --shadow: rgba(0, 0, 0, 0.45);
}
.theme-daylight {
    --bg: #eef1f5;
    --surface: #ffffff;
    --surface-2: #f6f8fa;
    --text: #1f2933;
    --muted: #5c6b7a;
    --accent: #2586be;
    --accent-2: #4c8f78;
    --border: rgba(0, 0, 0, 0.10);
    --shadow: rgba(0, 0, 0, 0.12);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", system-ui, -apple-system, Helvetica, Arial, sans-serif;
    line-height: 1.4;
    transition: background 0.25s ease, color 0.25s ease;
}

/* ---------- Loading overlay ---------- */
#loading {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: var(--bg);
    color: var(--text);
    font-size: 1.25rem;
}
#loading.hidden { display: none; }
.spinner {
    width: 22px;
    height: 22px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Top bar ---------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 24px;
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 14px var(--shadow);
}
.brand-text h1 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}
.brand-text .subtitle {
    color: var(--muted);
    font-size: 0.8rem;
}

.controls { display: flex; flex-wrap: wrap; gap: 14px; }
.control { display: flex; flex-direction: column; gap: 4px; }
.control label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}
.control select {
    min-width: 150px;
    padding: 7px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
}
.control select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- Content shell ---------- */
.content {
    max-width: 1500px;
    margin: 0 auto;
    padding: 20px 24px 40px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* ---------- Under-construction / stale-data warning ---------- */
.warning-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-align: center;
    margin: 0 auto;
    max-width: 900px;
    padding: 10px 18px;
    border-radius: 12px;
    background: color-mix(in srgb, #f5a623 22%, var(--surface));
    border: 1px solid color-mix(in srgb, #f5a623 55%, var(--border));
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
}
.warning-icon { font-size: 1.15rem; color: #f5a623; }

/* ---------- KPI strip ---------- */
.kpi-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 14px;
}
.kpi-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 18px;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 6px 18px var(--shadow);
}
.kpi-card.accent { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.kpi-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--muted);
}
.kpi-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}
.kpi-card.accent .kpi-value { color: var(--accent); }

/* ---------- Panels ---------- */
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px 18px 8px;
    box-shadow: 0 6px 18px var(--shadow);
}
.panel-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.panel-title {
    margin: 0;
    font-size: 1.02rem;
    font-weight: 600;
    position: relative;
    padding-left: 12px;
}
.panel-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 4px;
    border-radius: 3px;
    background: linear-gradient(var(--accent), var(--accent-2));
}
.panel-sub { color: var(--muted); font-size: 0.8rem; }

/* ---------- Grid layouts ---------- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}
@media (max-width: 960px) {
    .grid-2 { grid-template-columns: 1fr; }
}

/* ---------- Pie grid ---------- */
.pie-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.pie-cell { display: flex; flex-direction: column; }
.pie-caption {
    text-align: center;
    font-size: 0.78rem;
    color: var(--muted);
    margin-bottom: 2px;
}
@media (max-width: 720px) {
    .pie-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Chart sizing ---------- */
.chart { width: 100%; min-height: 240px; }
.chart.tall { min-height: 560px; }

/* ---------- Image row ---------- */
.image-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
    padding-bottom: 8px;
}
.image-row img {
    max-width: 48%;
    height: auto;
    border-radius: 10px;
    border: 1px solid var(--border);
}
@media (max-width: 720px) {
    .image-row img { max-width: 100%; }
}

/* ---------- Footer ---------- */
.site-footer {
    max-width: 1500px;
    margin: 0 auto;
    padding: 20px 24px 40px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.footer-note { color: var(--muted); font-size: 0.82rem; max-width: 720px; margin: 0; }
.footer-links { display: flex; gap: 18px; }
.ext-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}
.ext-link:hover { text-decoration: underline; }

/* ============================================================================
   Layout variants (applied to <body> as data-layout)
   ========================================================================== */

/* Focus: everything stacks into a single readable column */
body[data-layout="focus"] .grid-2 { grid-template-columns: 1fr; }
body[data-layout="focus"] .content { max-width: 1080px; }
body[data-layout="focus"] .pie-grid { grid-template-columns: repeat(2, 1fr); }

/* Dense: tighter spacing, smaller charts */
body[data-layout="dense"] .content { gap: 12px; padding-top: 14px; }
body[data-layout="dense"] .panel { padding: 12px 14px 6px; border-radius: 12px; }
body[data-layout="dense"] .grid-2 { gap: 12px; }
body[data-layout="dense"] .chart.tall { min-height: 440px; }
body[data-layout="dense"] .chart { min-height: 200px; }
body[data-layout="dense"] .kpi-value { font-size: 1.25rem; }