/* ============================================================
   AP Physics 1 lab module — shared visual language
   (duplicated per module by design; modules stay self-contained)
   ============================================================ */

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

:root {
    --bg:     #f3f5f8;
    --panel:  #ffffff;
    --border: #d8dee6;
    --text:   #1f2a37;
    --muted:  #667085;
    --accent: #2563eb;
    --c1: #3b82f6;
    --c2: #10b981;
    --c3: #f59e0b;
    --c4: #ef4444;
    --c5: #8b5cf6;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
    padding: 20px;
}

#app { max-width: 1400px; margin: 0 auto; }

header { margin-bottom: 16px; }
header h1 { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.subtitle { font-size: 13px; color: var(--muted); margin-top: 2px; }
header a.back { font-size: 12px; color: var(--accent); text-decoration: none; }
header a.back:hover { text-decoration: underline; }

#top-row {
    display: grid;
    grid-template-columns: 270px 1fr 230px;
    gap: 14px;
    margin-bottom: 14px;
}

aside, main {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
}

#stage { padding: 0; display: flex; flex-direction: column; overflow: hidden; }

#sim {
    flex: none;
    width: 100%;
    height: 470px;
    display: block;
}

/* ---------- Controls ---------- */

.control-group { margin-bottom: 16px; }
.control-group:last-child { margin-bottom: 0; }
.control-group h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 8px;
}
.control-group label {
    display: block;
    font-size: 12px;
    color: var(--text);
    margin: 8px 0 4px;
}
.control-group label.check {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}
.control-group input[type=range] {
    width: 100%;
    accent-color: var(--accent);
}
.control-group input[type=checkbox] { accent-color: var(--accent); }
.control-group .note {
    font-size: 11px;
    color: var(--muted);
    margin-top: 6px;
    line-height: 1.4;
}

.mode-toggle {
    display: flex;
    gap: 4px;
    background: #f1f5f9;
    padding: 3px;
    border-radius: 6px;
}
.mode-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 5px 4px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    color: var(--muted);
    cursor: pointer;
}
.mode-btn.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,0.08); }

.small-btn {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text);
    margin-top: 6px;
}
.small-btn:hover { background: #eef2f7; }

.val-input {
    display: inline-block;
    width: 66px;
    padding: 1px 4px;
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-size: 12px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 3px;
    text-align: right;
    vertical-align: baseline;
}
.val-input:hover { border-color: var(--border); }
.val-input:focus { outline: none; border-color: var(--accent); background: #fff; }
.val-input.out-of-range { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }
.val-input::-webkit-outer-spin-button,
.val-input::-webkit-inline-spin-button { -webkit-appearance: none; margin: 0; }
.val-input[type=number] { -moz-appearance: textfield; appearance: textfield; }

/* ---------- Playback ---------- */

#playback {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: #f8fafc;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}
#playback button {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text);
    transition: background 0.1s, border-color 0.1s;
}
#playback button:hover { background: #eef2f7; border-color: #c0c9d4; }
#playback button:active { background: #e3e9f0; }
#playback button#playPause {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    min-width: 64px;
}
#playback button#playPause:hover { background: #1d4ed8; }
#playback button#record { border-color: #10b981; color: #065f46; }
#playback button#record:hover { background: #d1fae5; }

#time-display {
    margin-left: auto;
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-size: 12px;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

/* ---------- Readouts ---------- */

.readout { margin-bottom: 14px; }
.readout:last-child { margin-bottom: 0; }
.readout h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 8px;
}
.readout .row {
    display: grid;
    grid-template-columns: 84px 1fr auto;
    align-items: baseline;
    gap: 6px;
    padding: 3px 0;
    font-size: 13px;
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-variant-numeric: tabular-nums;
}
.readout .lbl {
    color: var(--muted);
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}
.readout .num { text-align: right; font-weight: 600; }
.readout .unit { color: var(--muted); font-size: 11px; }

.status {
    margin-top: 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    padding: 2px 6px;
    border-radius: 4px;
    background: #f1f5f9;
    display: inline-block;
}
.status.moving { color: #1e40af; background: #dbeafe; }
.status.done   { color: #065f46; background: #d1fae5; }
.status.warn   { color: #92400e; background: #fef3c7; }

/* ---------- Graphs ---------- */

#graphs-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 14px;
    margin-bottom: 14px;
}
.graph-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
}
.graph-box h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.line-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.line-dot.c1 { background: var(--c1); }
.line-dot.c2 { background: var(--c2); }
.line-dot.c3 { background: var(--c3); }
.line-dot.c4 { background: var(--c4); }
.line-dot.c5 { background: var(--c5); }
.graph-box canvas { width: 100%; height: 200px; display: block; }

/* ---------- Data table ---------- */

#data-row {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
}
.data-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.data-toolbar h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-right: 6px;
}
.data-toolbar button {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text);
}
.data-toolbar button:hover { background: #eef2f7; }
.data-toolbar label.check {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text);
    cursor: pointer;
    margin-left: 6px;
}
.data-toolbar .hint {
    margin-left: auto;
    font-size: 11px;
    color: var(--muted);
}
.table-wrap { overflow-x: auto; }
#data-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 12px;
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-variant-numeric: tabular-nums;
}
#data-table th, #data-table td {
    padding: 5px 10px;
    text-align: right;
    border-bottom: 1px solid #eef1f5;
    white-space: nowrap;
}
#data-table th {
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 600;
    color: var(--muted);
    background: #f8fafc;
    font-size: 11px;
}
#data-table th:first-child, #data-table td:first-child { text-align: left; color: var(--muted); }
#data-table td.del { text-align: center; }
#data-table td.del button {
    border: none;
    background: transparent;
    color: #9aa5b1;
    cursor: pointer;
    font-size: 13px;
}
#data-table td.del button:hover { color: #b91c1c; }
#data-table .empty { text-align: center; color: var(--muted); padding: 14px; font-family: -apple-system, sans-serif; }

/* ---------- Responsive ---------- */

@media (max-width: 1000px) {
    #top-row { grid-template-columns: 1fr; }
}