/* Zwift Physics Lab. Chart colours are the validated reference palette (light and dark steps). */
:root {
   color-scheme: light;
   --lab-page: #f6f6f3;
   --lab-surface: #fcfcfb;
   --lab-ink: #0b0b0b;
   --lab-ink-2: #52514e;
   --lab-muted: #898781;
   --lab-grid: #e1e0d9;
   --lab-axis: #c3c2b7;
   --lab-line: rgba(11, 11, 11, .10);
   --lab-control: #ffffff;
   --lab-soft: #efeee9;
   --lab-deemph: #c9c8c0;
   --lab-accent: #FC6719;
   --lab-accent-soft: #fff0e6;
   --lab-shadow: 0 1px 2px rgba(20, 24, 40, .06), 0 10px 28px -18px rgba(20, 24, 40, .30);
   --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100; --s5: #e87ba4; --s6: #008300; --s7: #6250d6; --s8: #e34948;
}
@media (prefers-color-scheme: dark) {
   :root:where(:not([data-theme="light"])) {
      color-scheme: dark;
      --lab-page: #0d0d0d; --lab-surface: #1a1a19; --lab-ink: #f0efec; --lab-ink-2: #c3c2b7; --lab-muted: #898781;
      --lab-grid: #2c2c2a; --lab-axis: #383835; --lab-line: rgba(255, 255, 255, .10); --lab-control: #232322; --lab-soft: #262624; --lab-deemph: #4a4a47;
      --lab-accent-soft: #3a2418; --lab-shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px -18px rgba(0, 0, 0, .7);
      --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
   }
}
:root[data-theme="dark"] {
   color-scheme: dark;
   --lab-page: #0d0d0d; --lab-surface: #1a1a19; --lab-ink: #f0efec; --lab-ink-2: #c3c2b7; --lab-muted: #898781;
   --lab-grid: #2c2c2a; --lab-axis: #383835; --lab-line: rgba(255, 255, 255, .10); --lab-control: #232322; --lab-soft: #262624; --lab-deemph: #4a4a47;
   --lab-accent-soft: #3a2418; --lab-shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px -18px rgba(0, 0, 0, .7);
   --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, 'Segoe UI', sans-serif; background: var(--lab-page); color: var(--lab-ink); -webkit-font-smoothing: antialiased; }
.lab-wrap { max-width: 1240px; margin: 0 auto; padding: 0 16px; }
a { color: inherit; }

/* Bootstrap controls on our surfaces */
.form-control, .form-select { background: var(--lab-control); color: var(--lab-ink); border-color: var(--lab-line); }
.form-control:focus, .form-select:focus { background: var(--lab-control); color: var(--lab-ink); border-color: var(--lab-accent); box-shadow: 0 0 0 .2rem rgba(252, 103, 25, .2); }
.form-control:disabled { background: var(--lab-soft); color: var(--lab-ink-2); }
.form-select { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23898781' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e"); background-repeat: no-repeat; background-position: right .75rem center; background-size: 16px 12px; }
.form-range::-webkit-slider-thumb { background: var(--lab-accent); }
.form-range::-moz-range-thumb { background: var(--lab-accent); }
.form-check-input:checked { background-color: var(--lab-accent); border-color: var(--lab-accent); }

/* Navbar and hero */
.lab-navbar { background: linear-gradient(135deg, #15171c 0%, #2b2f38 100%); border-bottom: 2px solid var(--lab-accent); }
.lab-navbar .navbar-brand { font-weight: 700; letter-spacing: -.01em; }
.lab-brand-icon { color: var(--lab-accent); font-size: 1.3rem; }
.lab-navbar .nav-link { color: rgba(255, 255, 255, .78); }
.lab-navbar .nav-link:hover { color: #fff; }
.lab-theme { background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .15); color: #fff; border-radius: 999px; width: 36px; height: 36px; margin-left: 8px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; }
.lab-theme:hover { background: rgba(255, 255, 255, .16); }
.lab-hero { background: linear-gradient(135deg, #1b1f27 0%, #2e3340 55%, #4a2a1c 100%); color: #fff; padding: 36px 0 32px; }
.lab-hero h1 { font-size: clamp(1.5rem, 2.8vw, 2.25rem); font-weight: 800; letter-spacing: -.02em; margin: 0 0 8px; }
.lab-hero p { margin: 0; max-width: 820px; color: rgba(255, 255, 255, .82); font-size: 1.02rem; line-height: 1.5; }
.lab-main { padding-top: 22px; padding-bottom: 44px; }

/* Cards */
.lab-card { background: var(--lab-surface); border: 1px solid var(--lab-line); border-radius: 14px; box-shadow: var(--lab-shadow); padding: 18px; }
.lab-card h2 { font-size: 1rem; font-weight: 700; margin: 0; letter-spacing: -.01em; }
.lab-group { border: 0; padding: 0; margin: 0; min-width: 0; }
.lab-group legend { float: none; width: auto; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--lab-muted); font-weight: 700; margin: 0 0 10px; padding: 0; display: flex; align-items: center; gap: 8px; }
.lab-group legend .bi { color: var(--lab-accent); }
.lab-settings-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 22px; }
.lab-lookup { display: flex; gap: 8px; }
.lab-lookup .form-control { flex: 1; }
.lab-btn { background: var(--lab-ink); color: var(--lab-surface); border: 0; font-weight: 600; }
.lab-btn:hover { background: var(--lab-accent); color: #fff; }
.lab-help { margin: 8px 0 10px; font-size: .78rem; color: var(--lab-muted); line-height: 1.4; }
.lab-fields { display: grid; gap: 8px 10px; }
.lab-fields-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.lab-fields-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.lab-fields label, .lab-select-label, .lab-bike-picker label, .lab-solve-inputs label { display: block; font-size: .76rem; font-weight: 600; color: var(--lab-ink-2); }
.lab-fields input, .lab-fields select, .lab-solve-inputs input { margin-top: 4px; font-weight: 600; font-size: .95rem; padding: 6px 8px; }
.lab-fields input::placeholder { font-weight: 400; color: var(--lab-muted); }
.lab-unit { color: var(--lab-muted); font-weight: 500; }
.lab-select-label { margin-top: 10px; }
.lab-select-label select { margin-top: 4px; }
.lab-field-label { font-size: .76rem; font-weight: 600; color: var(--lab-ink-2); margin: 12px 0 6px; }
.lab-gradient-range { margin: 2px 0 0; }
.lab-readout { margin: 10px 0 0; font-size: .84rem; color: var(--lab-ink-2); font-weight: 500; }
.lab-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.lab-chips button { border: 1px solid var(--lab-line); background: var(--lab-control); border-radius: 999px; padding: 4px 12px; font-size: .8rem; font-weight: 600; color: var(--lab-ink-2); cursor: pointer; }
.lab-chips button:hover { border-color: var(--lab-accent); color: var(--lab-accent); }
.lab-chips button.active { background: var(--lab-accent); border-color: var(--lab-accent); color: #fff; }
.lab-chips-sm button { padding: 3px 10px; font-size: .76rem; }
.lab-bike-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 10px; }
.lab-bike-picker label:first-child { grid-column: 1 / -1; }
.lab-bike-picker select { margin-top: 3px; }
.lab-socks { align-self: end; margin: 0 0 6px; font-size: .84rem; }

/* Solve */
.lab-solve { margin-top: 16px; }
.lab-solve-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 14px; }
.lab-solve-head h2 .bi { color: var(--lab-accent); margin-right: 6px; }
.lab-segmented { display: inline-flex; background: var(--lab-soft); border-radius: 10px; padding: 3px; gap: 2px; }
.lab-segmented button { border: 0; background: transparent; border-radius: 8px; padding: 6px 12px; font-size: .82rem; font-weight: 600; color: var(--lab-ink-2); cursor: pointer; }
.lab-segmented button.active { background: var(--lab-surface); color: var(--lab-ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .15); }
.lab-short { display: none; }
@media (max-width: 700px) { .lab-long { display: none; } .lab-short { display: inline; } }
.lab-solve-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 18px; align-items: start; }
.lab-solve-inputs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.lab-solve-inputs label.is-driven input { font-weight: 500; }
.lab-tiles-wrap { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.lab-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.lab-tiles-other .lab-tile { background: transparent; border: 1px dashed var(--lab-axis); }
.lab-other-key { display: inline-block; width: 14px; height: 2px; vertical-align: middle; margin-right: 6px; background: repeating-linear-gradient(90deg, var(--s8) 0 5px, transparent 5px 8px); }
.lab-tiles-wrap .lab-insight { margin-top: 0; }
.lab-rider2-switch { margin-top: 12px; font-size: .84rem; }
.lab-rider2-switch .lab-unit { display: block; font-size: .74rem; }
.lab-rider2 { margin-top: 8px; padding: 10px 12px; border: 1px dashed var(--lab-axis); border-radius: 10px; }
.lab-rider2 .lab-help { margin-bottom: 0; }
.lab-tile { background: var(--lab-soft); border-radius: 12px; padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.lab-tile-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--lab-muted); font-weight: 700; }
.lab-tile-value { font-size: clamp(1.3rem, 2.2vw, 1.8rem); font-weight: 800; letter-spacing: -.02em; }
.lab-tile-sub { font-size: .76rem; color: var(--lab-ink-2); }
.lab-split-wrap { margin-top: 16px; }
.lab-split-title { font-size: .76rem; text-transform: uppercase; letter-spacing: .07em; color: var(--lab-muted); font-weight: 700; margin-bottom: 8px; }
.lab-split { display: flex; gap: 2px; height: 28px; }
.lab-split-seg { border-radius: 4px; color: #fff; font-size: .78rem; font-weight: 700; display: flex; align-items: center; padding-left: 8px; overflow: visible; white-space: nowrap; min-width: 2px; }
.lab-status { margin: 10px 0 0; font-size: .8rem; color: var(--lab-muted); min-height: 1em; }

/* Experiments */
.lab-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.lab-exp-wide { grid-column: 1 / -1; }
.lab-exp-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.lab-exp-head p { margin: 2px 0 0; font-size: .84rem; color: var(--lab-ink-2); }
.lab-exp-tools { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.lab-route-select { max-width: 260px; }
.lab-table-toggle { border: 1px solid var(--lab-line); background: var(--lab-control); color: var(--lab-ink-2); border-radius: 8px; padding: 4px 10px; font-size: .76rem; font-weight: 600; cursor: pointer; white-space: nowrap; }
.lab-table-toggle[aria-pressed="true"] { background: var(--lab-ink); color: var(--lab-surface); border-color: var(--lab-ink); }
.lab-insight { margin: 10px 0 0; font-size: .9rem; line-height: 1.5; color: var(--lab-ink); }
body.is-loading .lab-chart-host, body.is-loading .lab-tiles, body.is-loading .lab-split { opacity: .55; transition: opacity .15s; }

/* Charts */
.lab-chart-figure { position: relative; }
.lab-svg { display: block; width: 100%; height: auto; font-family: inherit; }
.lab-grid line { stroke: var(--lab-grid); stroke-width: 1; }
.lab-axis { stroke: var(--lab-axis) !important; }
.lab-tick { font-size: 11px; fill: var(--lab-muted); font-variant-numeric: tabular-nums; }
.lab-axis-label { font-size: 11px; fill: var(--lab-muted); font-weight: 600; }
.lab-cat { font-size: 12px; fill: var(--lab-ink-2); font-weight: 600; }
.lab-value { font-size: 11px; fill: var(--lab-ink-2); font-variant-numeric: tabular-nums; }
.lab-line { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.lab-line-dash { stroke-dasharray: 6 4; }
.lab-key-dash { background: repeating-linear-gradient(90deg, var(--c) 0 5px, transparent 5px 8px); }
.lab-area { fill-opacity: .18; stroke: none; }
.lab-end-label { font-size: 11px; fill: var(--lab-ink-2); font-weight: 600; }
.lab-leader { stroke: var(--lab-axis); stroke-width: 1; }
.lab-marker-line { stroke: var(--lab-axis); stroke-width: 1; }
.lab-marker-ring { fill: var(--lab-surface); }
.lab-marker { fill: var(--lab-ink); }
.lab-marker-label { font-size: 11px; fill: var(--lab-ink); font-weight: 700; }
.lab-cross { stroke: var(--lab-ink-2); stroke-width: 1; pointer-events: none; }
.lab-dot-ring { fill: var(--lab-surface); pointer-events: none; }
.lab-dot { pointer-events: none; }
.lab-bar { transition: opacity .1s; }
.lab-bar.is-hover { opacity: .8; }
.lab-svg rect[tabindex]:focus { outline: none; }
.lab-tip { position: absolute; z-index: 5; background: var(--lab-surface); border: 1px solid var(--lab-line); border-radius: 8px; padding: 8px 10px; box-shadow: var(--lab-shadow); font-size: .78rem; pointer-events: none; min-width: 150px; }
.lab-tip-x { color: var(--lab-muted); font-weight: 600; margin-bottom: 4px; }
.lab-tip-row { display: flex; align-items: center; gap: 6px; }
.lab-tip-row strong { font-variant-numeric: tabular-nums; }
.lab-tip-label { color: var(--lab-ink-2); }
.lab-tip-extra { color: var(--lab-muted); margin-top: 4px; }
.lab-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 6px; font-size: .78rem; color: var(--lab-ink-2); }
.lab-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.lab-key { display: inline-block; background: var(--c); }
.lab-key-line { width: 14px; height: 2px; border-radius: 1px; }
.lab-key-bar { width: 10px; height: 10px; border-radius: 2px; }
.lab-table table { width: 100%; border-collapse: collapse; font-size: .8rem; margin-top: 4px; }
.lab-table th, .lab-table td { padding: 4px 8px; border-bottom: 1px solid var(--lab-grid); text-align: right; font-variant-numeric: tabular-nums; }
.lab-table th:first-child, .lab-table td:first-child { text-align: left; }
.lab-table thead th { color: var(--lab-muted); font-weight: 600; }
.lab-table tbody th { font-weight: 500; color: var(--lab-ink-2); }

/* Notes and footer */
.lab-notes { margin-top: 26px; color: var(--lab-ink-2); font-size: .9rem; }
.lab-notes h2 { font-size: 1rem; font-weight: 700; color: var(--lab-ink); margin-bottom: 8px; }
.lab-notes ul { padding-left: 18px; margin: 0; }
.lab-notes li { margin-bottom: 6px; line-height: 1.5; }
.lab-footer { background: #15171c; color: rgba(255, 255, 255, .7); padding: 20px 0; font-size: .82rem; text-align: center; }
.lab-footer p { margin: 0 0 4px; }
.lab-footer a { color: rgba(255, 255, 255, .85); }
.lab-credit { color: rgba(255, 255, 255, .45); font-size: .76rem; }

@media (max-width: 1100px) {
   .lab-settings-grid { grid-template-columns: 1fr 1fr; }
   .lab-settings-grid .lab-group:first-child { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
   .lab-grid { grid-template-columns: 1fr; }
   .lab-solve-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
   .lab-settings-grid { grid-template-columns: 1fr; }
   .lab-fields-4 { grid-template-columns: 1fr 1fr; }
   .lab-tiles { grid-template-columns: 1fr; }
   .lab-tile { flex-direction: row; align-items: baseline; justify-content: space-between; flex-wrap: wrap; }
   .lab-tile-sub { width: 100%; }
   .lab-exp-head { flex-direction: column; }
   .lab-route-select { max-width: none; }
   .lab-hero { padding: 26px 0 22px; }
}