:root {
    color-scheme: dark;

    --bg: #0d1015;
    --surface: #151a21;
    --surface-2: #1d242d;
    --border: #2a333e;
    --text: #e9eef4;
    --muted: #8d99a8;
    --accent: #ffb020;
    --accent-text: #1a1200;
    --ok: #34d07a;
    --warn: #ffb020;
    --danger: #f2555a;

    --z1: #5f6b7a;
    --z2: #3d83f5;
    --z3: #2fbf6a;
    --z4: #e8bd1c;
    --z5: #f5832a;
    --z6: #ec4b4b;

    /* heart rate zones, the Garmin and Polar colours */
    --hr1: #9aa5b1;
    --hr2: #3d83f5;
    --hr3: #2fbf6a;
    --hr4: #f5832a;
    --hr5: #ec4b4b;

    --hr-line: #ff5c8a;
    --cadence-line: #38d6e8;

    --radius: 12px;
    --gutter: 16px;
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    -webkit-text-size-adjust: 100%;
}

body {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

button, input { font: inherit; color: inherit; }

button {
    min-height: 44px;
    padding: 0 16px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    cursor: pointer;
    touch-action: manipulation;
}
button:hover:not(:disabled) { border-color: var(--muted); }
button:disabled { opacity: 0.4; cursor: default; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 650; }
button.danger { color: var(--danger); }

/* header */

.bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px var(--gutter);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--accent);
    text-decoration: none;
}

.brand-mark { display: block; flex: none; }

/* page tabs: inline in the header, a bottom bar on phones */

.tabs { display: flex; gap: 4px; }
.tabs a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 36px;
    padding: 0 12px;
    border-radius: 10px;
    color: var(--muted);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
}
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.tabs a:focus-visible, .brand:focus-visible, .button-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tab-icon { display: none; }

/* a ride keeps you on the ride screen */
body[data-state="running"] .tabs,
body[data-state="paused"] .tabs { display: none; }

.devices {
    display: flex;
    gap: 8px;
    margin-left: auto;
    flex-wrap: wrap;
}

.device {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 36px;
    padding: 0 12px;
    font-size: 14px;
    max-width: 100%;
}
.device-name {
    color: var(--muted);
    max-width: 14ch;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.device-name:empty { display: none; }
.device .narrow { display: none; }

@media (max-width: 639px) {
    body { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
    body[data-state="running"], body[data-state="paused"] { padding-bottom: env(safe-area-inset-bottom); }
    .tabs {
        position: fixed;
        z-index: 10;
        left: 0;
        right: 0;
        bottom: 0;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 0;
        padding: 4px 4px calc(4px + env(safe-area-inset-bottom));
        background: var(--surface);
        border-top: 1px solid var(--border);
    }
    .tabs a {
        flex-direction: column;
        justify-content: center;
        gap: 2px;
        min-height: 54px;
        padding: 0 4px;
        font-size: 12px;
    }
    .tabs a[aria-current="page"] { color: var(--accent); background: none; }
    .tab-icon { display: block; font-size: 18px; line-height: 1; }
    .devices { margin-left: 0; width: 100%; flex-wrap: nowrap; gap: 6px; }
    .device { flex: 1 1 0; justify-content: center; gap: 6px; padding: 0 8px; min-width: 0; }
    .device .wide, .device-name { display: none; }
    .device .narrow { display: inline; }
}

.dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--muted);
    flex: none;
}
.device[data-status="connected"] .dot { background: var(--ok); }
.device[data-status="connecting"] .dot,
.device[data-status="searching"] .dot,
.device[data-status="reconnecting"] .dot { background: var(--warn); animation: pulse 1s ease-in-out infinite; }

@keyframes pulse { 50% { opacity: 0.3; } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none !important; } }

/* main */

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 12px var(--gutter) 16px;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.banners { display: flex; flex-direction: column; gap: 8px; }
.banners:empty { display: none; }

.banner {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 10px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: 15px;
}
.banner.warn { border-color: var(--warn); }
.banner.error { border-color: var(--danger); }
.banner p { margin: 0; flex: 1 1 240px; }
.banner .actions { display: flex; gap: 8px; }

/* tiles */

.tiles {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.tile {
    display: grid;
    grid-template-rows: auto 1fr auto;
    padding: 8px 12px 10px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    min-width: 0;
}

.tile-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}
.tile-label small { font-size: inherit; text-transform: none; opacity: 0.8; }

.tile-value {
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    font-size: clamp(34px, 11vw, 64px);
    line-height: 1.05;
    white-space: nowrap;
    overflow: hidden;
}

.tile-unit {
    font-size: 13px;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tile-power .tile-value { color: var(--text); }
.tile-target .tile-value { color: var(--accent); }
#v-hr[data-zone="1"] { color: var(--hr1); }
#v-hr[data-zone="2"] { color: var(--hr2); }
#v-hr[data-zone="3"] { color: var(--hr3); }
#v-hr[data-zone="4"] { color: var(--hr4); }
#v-hr[data-zone="5"] { color: var(--hr5); }
.tile-target.out-of-range { border-color: var(--danger); }
.tile-target.out-of-range .tile-unit { color: var(--danger); font-weight: 650; }
.tile-interval.countdown { border-color: var(--accent); }
.tile-interval.countdown .tile-value,
.tile-interval.countdown .tile-unit { color: var(--accent); font-weight: 650; }

/* chart */

.chart {
    position: relative;
    flex: 1;
    min-height: 160px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    overflow: hidden;
}

.chart-box, .chart-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.chart-empty {
    position: absolute;
    inset: 0;
    margin: 0;
    display: grid;
    place-items: center;
    padding: 16px;
    text-align: center;
    color: var(--muted);
}
.chart-empty[hidden] { display: none; }

.profile polygon { opacity: 0.85; }
.z1 { fill: var(--z1); }
.z2 { fill: var(--z2); }
.z3 { fill: var(--z3); }
.z4 { fill: var(--z4); }
.z5 { fill: var(--z5); }
.z6 { fill: var(--z6); }

.done { fill: var(--bg); opacity: 0.45; }
.ftp-line { stroke: var(--text); stroke-width: 1; stroke-dasharray: 4 4; opacity: 0.5; }
.power-trace { fill: none; stroke: var(--text); stroke-width: 2; stroke-linejoin: round; }
.hr-trace { fill: none; stroke: var(--hr-line); stroke-width: 1.5; stroke-linejoin: round; }
.cadence-trace { fill: none; stroke: var(--cadence-line); stroke-width: 1.5; stroke-linejoin: round; }

.chart-legend {
    position: absolute;
    left: 8px;
    bottom: 6px;
    margin: 0;
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text);
    pointer-events: none;
}
.chart-legend span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 1px 6px;
    border-radius: 6px;
    background: rgb(13 16 21 / 0.7);
}
.chart-legend span[hidden] { display: none; }
.chart-legend span::before { content: ""; width: 12px; height: 3px; border-radius: 2px; background: var(--text); }
.chart-legend .legend-hr::before { background: var(--hr-line); }
.chart-legend .legend-cadence::before { background: var(--cadence-line); }

/* text messages from the workout file */
.cue-text {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    max-width: calc(100% - 24px);
    margin: 0;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: rgb(13 16 21 / 0.85);
    color: var(--text);
    font-size: 17px;
    font-weight: 600;
    text-align: center;
    overflow-wrap: anywhere;
}
.cue-text[hidden] { display: none; }
.cursor { stroke: var(--accent); stroke-width: 2; }

/* controls */

.controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.controls > button { flex: 1 1 120px; min-height: 52px; font-size: 17px; }

.bias {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1 1 160px;
    justify-content: center;
}
.bias button { width: 52px; min-height: 52px; padding: 0; font-size: 22px; }
.bias-value {
    min-width: 6ch;
    text-align: center;
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    font-size: 18px;
}

/* views */

[hidden] { display: none !important; }

.view-ride {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

.page {
    display: grid;
    gap: 12px;
    align-content: start;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
}
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; }
.page h1 { margin: 0; font-size: 24px; font-weight: 750; }
.page h1:focus { outline: none; }

.card {
    display: grid;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    min-width: 0;
}

.workout-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 8px 8px 14px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
}
.workout-bar .workout-info { flex: 1; min-width: 0; }
.workout-bar .workout-name { font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workout-bar .workout-description { margin: 2px 0 0; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workout-description:empty { display: none; }
.workout-bar .workout-meta { margin-top: 2px !important; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
body[data-state="running"] .workout-bar .button-link,
body[data-state="paused"] .workout-bar .button-link { display: none; }

.button-link {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    flex: none;
}
.button-link:hover { border-color: var(--muted); }

.hint { color: var(--muted); font-size: 13px; }
.hint code {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text);
    overflow-wrap: anywhere;
}
p.hint { margin: 0; line-height: 1.5; }

.card-title {
    margin: 0;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.device-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
}
.device-row .row-text { flex: 1 1 180px; min-width: 0; }
.device-row [data-role="status"] { white-space: normal; overflow-wrap: anywhere; }
.device-row .row-title { display: flex; align-items: center; gap: 8px; }
.device-row[data-status="connected"] .dot { background: var(--ok); }
.device-row[data-status="connecting"] .dot,
.device-row[data-status="searching"] .dot,
.device-row[data-status="reconnecting"] .dot { background: var(--warn); animation: pulse 1s ease-in-out infinite; }
.device-row .row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.device-row .row-actions button { min-height: 40px; font-size: 14px; padding: 0 12px; }

.check {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    font-size: 15px;
    cursor: pointer;
}
.check input { flex: none; width: 20px; height: 20px; accent-color: var(--accent); margin: 0; }
/* a hint under a checkbox belongs to it, closer than the card's gap */
.check + .hint { margin-top: -16px; }

.field { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.field input, .field select {
    min-height: 44px;
    padding: 0 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    width: 100%;
}
.field input:invalid { border-color: var(--danger); }
.field select { appearance: auto; }

.zone-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.zone-field span { display: inline-flex; align-items: center; gap: 8px; }
.swatch { display: inline-block; flex: none; width: 12px; height: 12px; border-radius: 3px; }
.hr-swatch-1 { background: var(--hr1); }
.hr-swatch-2 { background: var(--hr2); }
.hr-swatch-3 { background: var(--hr3); }
.hr-swatch-4 { background: var(--hr4); }
.hr-swatch-5 { background: var(--hr5); }

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

.upload {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 10px;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
.upload:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.upload:has(input:disabled) { opacity: 0.4; cursor: default; }

.workout-info p { margin: 0; }
.workout-name { font-size: 18px; font-weight: 650; overflow-wrap: anywhere; }
.workout-meta { color: var(--muted); font-size: 14px; margin-top: 4px !important; }
.error { color: var(--danger); font-size: 14px; }
.error:empty { display: none; }
.page .error { margin: 0; }
.empty { margin: 0; color: var(--muted); font-size: 14px; }
.empty[hidden] { display: none; }

.list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 6px;
}


.list li {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
}

.workout-row {
    flex: 1;
    min-width: 0;
    display: grid;
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    padding: 8px 10px;
    min-height: 52px;
    text-align: left;
    background: var(--bg);
}
.workout-row[aria-pressed="true"] { border-color: var(--accent); background: var(--surface-2); }

.profile-slot { display: block; pointer-events: none; }
.profile-thumb { width: 76px; height: 30px; display: block; }
.profile-thumb polygon { opacity: 0.9; }

.row-text { display: grid; gap: 2px; min-width: 0; }
.row-title {
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.row-description:empty { display: none; }
.row-description,
.row-meta {
    font-size: 13px;
    color: var(--muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tag {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    border-radius: 6px;
    border: 1px solid var(--warn);
    color: var(--warn);
    font-size: 11px;
    font-weight: 600;
    vertical-align: 1px;
}

.icon-button { width: 44px; padding: 0; flex: none; color: var(--muted); font-size: 20px; }
.icon-button:hover { color: var(--danger); }

.history-row {
    flex: 1;
    min-width: 0;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
}
.history-list li { align-items: stretch; }
.history-list .row-actions { display: flex; gap: 6px; flex: none; }
.history-list .row-actions button { font-size: 14px; padding: 0 12px; }
.history-list .row-actions .icon-button { font-size: 20px; padding: 0; }


/* repository link and build, next to the brand */

.repo { display: flex; align-items: center; gap: 8px; font-size: 12px; }

/* phones: the repo link shares the logo row, the device buttons get their own row below */
@media (max-width: 639px) {
    .repo { order: 1; margin-left: auto; }
    .devices { order: 2; }
}
.repo-link {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    color: var(--muted);
    text-decoration: none;
}
.repo-link:hover { color: var(--text); }
.repo-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.version { font-family: var(--mono); }
.github-mark { display: block; }

/* summary dialog */

.summary {
    width: min(440px, calc(100vw - 32px));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    padding: 20px;
}
.summary::backdrop { background: rgb(0 0 0 / 0.6); }
.summary h2 { margin: 0 0 4px; }
.stats {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 16px;
    margin: 16px 0;
}
.stats dt { color: var(--muted); }
.stats dd { margin: 0; font-family: var(--mono); font-variant-numeric: tabular-nums; text-align: right; }
.dialog-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.dialog-actions button { flex: 1 1 140px; }

/* larger screens */

@media (min-width: 900px), (orientation: landscape) and (min-width: 600px) {
    .tiles { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .tile-value { font-size: clamp(30px, 4.6vw, 72px); }
}

/* phone landscape: short screen, keep the chart visible */
@media (orientation: landscape) and (max-height: 500px) {
    .bar { padding: 6px var(--gutter); flex-wrap: nowrap; gap: 8px; }
    .tabs a { padding: 0 8px; }
    .device { padding: 0 10px; gap: 6px; }
    .device .wide, .device-name { display: none; }
    .device .narrow { display: inline; }
    main, .view-ride { gap: 8px; }
    main { padding-top: 8px; }
    .workout-bar { display: none; }
    .tile { padding: 6px 10px; }
    .tile-value { font-size: clamp(26px, 5vw, 44px); }
    .controls > button, .bias button { min-height: 44px; }
}