:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1d2330;
    --muted: #6b7280;
    --border: #e3e6eb;
    --accent: #2f6fde;
    --accent-hover: #2459b8;
    --btn: #f1f3f6;
    --btn-hover: #e5e8ed;
    --small-car: #d946ef;
    --big-car: #3b82f6;
    --you: #facc15;
    --lane1: #2f6fde;
    --lane2: #f59e0b;
    --neutral: #9ca3af;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12151b;
        --card: #1b1f27;
        --text: #e6e8ec;
        --muted: #9aa1ad;
        --border: #2b313c;
        --btn: #262b35;
        --btn-hover: #313744;
        --neutral: #4b5563;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 24px;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

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

header h1 {
    margin: 0 0 4px;
    font-size: 24px;
    font-weight: 650;
    letter-spacing: -0.01em;
}

header p {
    margin: 0 0 20px;
    color: var(--muted);
    font-size: 17px;
}

.panel {
    display: grid;
    grid-template-columns: minmax(300px, 1.3fr) minmax(280px, 1.2fr) minmax(220px, 0.8fr);
    gap: 16px;
    margin-bottom: 16px;
}

.panel.lower {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
    margin-top: 16px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    min-width: 0;
}

.card h2 {
    margin: 0 0 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
}

.hint {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 12px;
}

button, select {
    font: inherit;
    color: var(--text);
    background: var(--btn);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.05s;
}

button:hover:not(:disabled), select:hover:not(:disabled) {
    background: var(--btn-hover);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:disabled, select:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

button:focus-visible, select:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

button.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 600;
}

button.primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

button.quiet {
    background: transparent;
    color: var(--muted);
}

.button-row {
    display: flex;
    gap: 8px;
}

.button-row > * {
    flex: 1;
}

.hint + .button-row {
    margin-top: 12px;
}

.swatch {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 3px;
    margin-right: 6px;
    vertical-align: -1px;
}

.swatch.small { background: var(--small-car); }
.swatch.big { background: var(--big-car); }
.swatch.you { border: 2px solid var(--you); }

/* Queue editor */

.lane + .lane {
    margin-top: 12px;
}

.lane-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.lane-row .label {
    width: 52px;
    font-weight: 600;
}

.queue {
    display: flex;
    flex-direction: row-reverse;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 3px;
    min-height: 32px;
    margin-top: 6px;
    padding: 6px 8px;
    border-radius: 8px;
    background: var(--btn);
    border-right: 4px solid var(--text);
}

.queue.drop-target {
    outline: 2px dashed var(--accent);
}

.queue .empty {
    color: var(--muted);
    font-size: 12px;
}

.chip {
    width: 10px;
    height: 18px;
    padding: 0;
    border: none;
    border-radius: 3px;
    background: var(--small-car);
}

.chip.big {
    width: 32px;
    background: var(--big-car);
}

.chip:hover:not(:disabled) {
    background: var(--small-car);
    filter: brightness(1.2);
}

.chip.big:hover:not(:disabled) {
    background: var(--big-car);
}

.chip.you {
    box-shadow: 0 0 0 2px var(--you);
}

.chip.drop-before {
    box-shadow: 3px 0 0 0 var(--accent);
}

.chip.dragging {
    opacity: 0.3;
}

/* Presets and controls */

.presets {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.presets button {
    text-align: left;
}

.presets button[aria-pressed="true"] {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 14%, var(--card));
    box-shadow: inset 3px 0 0 var(--accent);
    font-weight: 600;
}

.run {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.run h2 {
    margin-bottom: 2px;
}

.run #play {
    padding: 10px 12px;
}

.field {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.field > span {
    color: var(--muted);
}

.segmented {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.segmented button {
    border: none;
    border-radius: 0;
    padding: 4px 10px;
}

.segmented button + button {
    border-left: 1px solid var(--border);
}

.segmented button[aria-pressed="true"] {
    background: var(--accent);
    color: #fff;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.toggle input {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Road */

.road-card {
    padding: 0;
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
}

.road-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    margin: 0;
    padding: 10px 16px;
    color: var(--muted);
    font-size: 12px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* Trials */

progress {
    width: 100%;
    margin-top: 12px;
    accent-color: var(--accent);
}

.win-bar {
    display: flex;
    height: 28px;
    margin: 14px 0 6px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--btn);
}

.win-bar div {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    overflow: hidden;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.trial-headline {
    margin: 12px 0 0;
    font-size: 15px;
    font-weight: 600;
}

.trial-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 14px;
    color: var(--muted);
    font-size: 12px;
}

table {
    width: 100%;
    margin-top: 10px;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

th, td {
    padding: 6px 8px;
    text-align: right;
    border-bottom: 1px solid var(--border);
}

th:first-child, td:first-child {
    text-align: left;
}

th {
    color: var(--muted);
    font-weight: 500;
    font-size: 12px;
}

/* Settings */

.settings summary {
    list-style: none;
    cursor: pointer;
}

.settings summary::-webkit-details-marker {
    display: none;
}

.settings summary h2 {
    display: inline;
}

.settings summary::after {
    content: "Show";
    float: right;
    color: var(--accent);
    font-size: 12px;
}

.settings[open] summary::after {
    content: "Hide";
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin: 12px 0;
}

.settings fieldset {
    margin: 0;
    padding: 0;
    border: none;
}

.settings legend {
    margin-bottom: 6px;
    font-weight: 600;
}

.settings label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
    color: var(--muted);
}

.settings input {
    width: 76px;
    font: inherit;
    color: var(--text);
    background: var(--btn);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 3px 6px;
    text-align: right;
}

.settings .unit {
    display: inline-block;
    width: 36px;
    margin-left: 4px;
    font-size: 12px;
}

@media (max-width: 1000px) {
    .panel, .panel.lower {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    body {
        padding: 16px;
    }
}