/* =============================================
   Street2Simulator — Bicycle IMU Dataset
   Academic clean stylesheet
   ============================================= */

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

body {
    margin: 0;
    padding: 0;
    font-family: "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    background: #f5f6f7;
    color: #222;
    overflow-x: auto;
}

/* ---- Header / Footer ---- */
header, footer {
    background: #1a2333;
    color: #e8eaf0;
    padding: 14px 24px;
}

header h1, footer p {
    margin: 0;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

header .subtitle {
    font-size: 0.85rem;
    color: #9aa3b4;
    margin-top: 2px;
}

footer {
    font-size: 0.8rem;
    color: #9aa3b4;
    text-align: center;
    padding: 12px 24px;
}

/* ---- Top row (video + metadata side-by-side) ---- */
#toprow {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
    padding: 16px 24px;
    background: #fff;
    border-bottom: 1px solid #dde0e6;
    flex-wrap: wrap;
}

.topblk {
    flex: 0 0 auto;
}

.topblk video {
    display: block;
    border-radius: 4px;
    border: 1px solid #ccc;
    background: #000;
}

/* ---- Metadata table ---- */
.metadata {
    background: #f9fafb;
    border: 1px solid #dde0e6;
    border-radius: 6px;
    padding: 12px 16px;
    min-width: 280px;
}

.metadata .row {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-bottom: 6px;
}

.metadata .row:last-child {
    margin-bottom: 0;
}

.metadata .key {
    font-weight: 600;
    color: #555;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.metadata .value {
    color: #111;
    font-size: 0.9rem;
    white-space: nowrap;
    margin-right: 12px;
}

/* ---- uPlot charts ---- */
.uplot {
    display: inline-block;
    vertical-align: top;
    margin: 8px;
    background: #fff;
    border: 1px solid #dde0e6;
    border-radius: 4px;
    padding: 4px;
}

/* ---- Index page grid ---- */
.page-wrapper {
    max-width: 900px;
    margin: 32px auto;
    padding: 0 24px;
}

.dataset-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    border: 1px solid #dde0e6;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}

.dataset-row {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid #eef0f3;
    gap: 16px;
}

.dataset-row:last-child {
    border-bottom: none;
}

.dataset-row:hover {
    background: #f7f9fc;
}

.dataset-label {
    flex: 1;
    font-weight: 600;
    color: #1a2333;
    font-size: 0.95rem;
}

.btn {
    display: inline-block;
    padding: 7px 18px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.btn-real {
    background: #1a4a8a;
    color: #fff;
    border: 1px solid #1a4a8a;
}

.btn-real:hover {
    background: #153d74;
    border-color: #153d74;
}

.btn-sim {
    background: #fff;
    color: #1a4a8a;
    border: 1px solid #1a4a8a;
}

.btn-sim:hover {
    background: #eef3fb;
}

.intro {
    margin-bottom: 24px;
}

.intro h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a2333;
    margin: 0 0 8px 0;
}

.intro p {
    color: #555;
    line-height: 1.65;
    margin: 0 0 10px 0;
    font-size: 0.92rem;
}

.sensor-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
}

.sensor-pill {
    background: #e8edf5;
    color: #1a3060;
    border-radius: 20px;
    padding: 3px 12px;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.grid-header {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    background: #f0f3f7;
    border-bottom: 1px solid #dde0e6;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #666;
    gap: 16px;
}

.grid-header .col-label { flex: 1; }