@layer reset, base, layout, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, p, figure { margin: 0; }
  img, svg { max-inline-size: 100%; }
}

@layer base {
  :root {
    color-scheme: light dark;
    --lt-bg: light-dark(#f7f8fb, #10131a);
    --lt-surface: light-dark(#ffffff, #171b24);
    --lt-surface-strong: light-dark(#f0f3f8, #202634);
    --lt-text: light-dark(#151923, #f1f4fa);
    --lt-muted: light-dark(#5e6677, #a7b0c0);
    --lt-border: light-dark(#d8deea, #30394a);
    --lt-accent: #0172ad;
    --lt-brand: #0172ad;
    --lt-brand-dark: #015887;
    --lt-green: #159957;
    --lt-yellow: #facc15;
    --lt-blue: #2f73d9;
    --lt-track: #b5bfca;
    --lt-danger: #b42318;
    --lt-radius: .5rem;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
    background: var(--lt-bg);
    color: var(--lt-text);
  }

  .app-shell {
    min-block-size: 100svh;
    display: grid;
    grid-template-rows: auto auto auto auto 1fr;
  }
  .appbar {
    display: grid;
    grid-template-columns: auto auto minmax(16rem, 1.25fr) auto;
    gap: 1rem;
    align-items: center;
    padding: .72rem 1rem;
    background: var(--lt-brand);
    color: white;
  }
  .brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    min-inline-size: 0;
  }
  .brand-mark {
    display: grid;
    place-items: center;
    inline-size: 2.25rem;
    block-size: 2.25rem;
    padding: 0;
    border: 0;
    background: transparent;
  }
  .brand-mark img {
    display: block;
    inline-size: 100%;
    block-size: 100%;
    max-inline-size: none;
    max-block-size: none;
    border: 0;
    border-radius: .5rem;
    background: transparent;
    transform: scale(1.5);
    object-fit: cover;
  }
  .brand strong,
  .brand span,
  .session-title strong,
  .session-title span,
  .session-context strong,
  .session-context span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .session-title {
    display: flex;
    align-items: center;
    gap: .45rem;
    min-inline-size: 0;
    inline-size: 100%;
  }
  .session-title-copy {
    min-inline-size: 0;
    flex: 1;
  }
  .session-context-title {
    display: flex;
    align-items: center;
    gap: .45rem;
    min-inline-size: 0;
  }
  .session-context-title strong {
    min-inline-size: 0;
    flex: 1;
  }
  .session-title-actions {
    display: flex;
    flex: 0 0 auto;
    gap: .25rem;
  }
  .title-action {
    inline-size: 1.7rem;
    min-block-size: 1.7rem;
    border-color: rgb(255 255 255 / .65);
    background: transparent;
    font-size: 1.25rem;
    line-height: 1;
  }
  .session-context .title-action {
    color: var(--lt-text);
    border-color: var(--lt-border);
  }
  .title-action svg {
    inline-size: 1rem;
    block-size: 1rem;
  }
  .brand span,
  .session-title span {
    color: rgb(255 255 255 / .78);
    font-size: .82rem;
  }
  .strava-activity-link {
    color: #fc5200;
    font-size: .78rem;
    font-weight: 700;
  }
  .strava-attribution {
    margin: 0;
    color: #fc5200;
    font-size: .78rem;
    font-weight: 750;
  }
  .app-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    align-items: center;
    justify-content: end;
  }
  .activity-toolbar {
    display: flex;
    align-items: center;
    gap: .3rem;
    min-inline-size: 0;
    inline-size: 100%;
    overflow-x: auto;
    scrollbar-width: thin;
  }
  .activity-choice,
  .toolbar-action {
    min-block-size: 2.1rem;
    border: 1px solid rgb(255 255 255 / .42);
    border-radius: .4rem;
    background: rgb(255 255 255 / .12);
    color: white;
    font: inherit;
    font-size: .78rem;
    font-weight: 700;
    white-space: nowrap;
  }
  .activity-choice {
    padding: .25rem .55rem;
    border-color: white;
    box-shadow: none;
  }
  .activity-choice.active,
  .toolbar-action:hover,
  .title-action:hover {
    background: white;
    color: var(--lt-brand-dark);
  }
  .toolbar-action { padding: .25rem .6rem; }
  .icon-action,
  .app-menu summary,
  .ghost-action {
    min-block-size: 2.2rem;
    border: 1px solid transparent;
    border-radius: .42rem;
  }
  .icon-action {
    display: grid;
    place-items: center;
    inline-size: 2.2rem;
    padding: 0;
    background: rgb(255 255 255 / .16);
    color: white;
    text-decoration: none;
  }
  .import-action svg {
    inline-size: 1.35rem;
    block-size: 1.35rem;
  }
  .import-header {
    align-items: start;
  }
  .shared-link-import-card form {
    display: grid;
    gap: .65rem;
  }
  .shared-link-import-card label {
    display: grid;
    gap: .35rem;
    font-weight: 700;
  }
  .shared-link-import-card input {
    inline-size: 100%;
    box-sizing: border-box;
    padding: .7rem .75rem;
    border: 1px solid var(--lt-border);
    border-radius: .4rem;
    font: inherit;
  }
  .ai-prompt-nav {
    font-size: 1.25rem;
  }
  .share-nav svg {
    inline-size: 1.45rem;
    block-size: 1.45rem;
  }
  details.app-menu {
    position: relative;
    display: flex;
    align-items: center;
    margin-block: 0 !important;
  }
  .app-menu summary {
    display: grid;
    place-items: center;
    align-self: center;
    block-size: 2.2rem;
    min-block-size: 2.2rem;
    line-height: 1;
    padding: 0 .72rem;
    background: white;
    color: var(--lt-brand-dark);
    cursor: pointer;
    font-weight: 760;
    list-style: none;
  }
  .app-menu summary::-webkit-details-marker {
    display: none;
  }
  .menu-panel {
    position: absolute;
    z-index: 20;
    inset-block-start: calc(100% + .45rem);
    inset-inline-end: 0;
    display: grid;
    gap: .75rem;
    inline-size: min(24rem, calc(100vw - 2rem));
    max-block-size: min(70vh, 42rem);
    overflow: auto;
    padding: .85rem;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
    color: var(--lt-text);
    box-shadow: 0 14px 34px rgb(20 29 39 / .18);
  }
  .menu-toggle {
    display: flex;
    align-items: center;
    gap: .45rem;
    margin-block-start: .85rem;
    font-weight: 700;
  }
  .menu-panel h2 {
    font-size: 1rem;
  }
  .session-strip {
    display: grid;
    grid-template-columns: minmax(12rem, 1fr) auto auto;
    gap: 1rem;
    align-items: center;
    padding: .7rem 1rem;
    border-block-end: 1px solid var(--lt-border);
    background: var(--lt-surface);
  }
  .session-strip.comparison-summary {
    grid-template-columns: minmax(9rem, auto) auto minmax(0, 1fr) auto;
  }
  .session-context span {
    color: var(--lt-muted);
    font-size: .85rem;
  }
  .quick-laps {
    display: flex;
    gap: .45rem;
    overflow-x: auto;
  }
  .quick-lap {
    display: grid;
    justify-items: center;
    gap: .12rem;
    min-inline-size: 3.5rem;
    padding: .15rem .25rem;
    border: 0;
    background: transparent;
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .quick-avatar {
    display: grid;
    place-items: center;
    inline-size: 2.15rem;
    block-size: 2.15rem;
    border: 2px solid var(--lt-border);
    border-radius: 50%;
    background: linear-gradient(135deg, #a8b3c1, #202936);
    color: white;
    font-weight: 850;
    contain: paint;
  }
  .quick-lap.active .quick-avatar {
    border-color: var(--lt-brand);
    background: var(--lt-brand);
  }
  .activity-review-list {
    overflow-x: auto;
    padding: .65rem .75rem;
  }
  .activity-review-head,
  .activity-review-row {
    display: grid;
    grid-template-columns: minmax(5rem, .7fr) repeat(var(--section-count, 6), minmax(5.5rem, 1fr));
    gap: .45rem;
    align-items: center;
    min-inline-size: 22rem;
  }
  .activity-review-head {
    padding-block: .25rem .5rem;
    color: var(--lt-muted);
    font-size: .72rem;
    font-weight: 750;
  }
  .activity-review-row {
    padding-block: .45rem;
    border-block-start: 1px solid var(--lt-border);
    font-variant-numeric: tabular-nums;
    font-size: .82rem;
  }
  .activity-review-row span { text-align: end; }
  .activity-review-row .fast { color: var(--lt-green); font-weight: 800; }
  .activity-review-row .near { color: #a16207; }
  .activity-review-row .lost { color: var(--lt-danger); }
  .activity-map-legend {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    padding: .55rem .75rem;
    border-block-end: 1px solid var(--lt-border);
    background: var(--lt-surface);
  }
  .map-activity-key {
    padding: .25rem .5rem .25rem 1rem;
    border: 1px solid var(--lt-border);
    border-inline-start: .35rem solid var(--activity-color);
    border-radius: .35rem;
    background: var(--lt-surface);
    color: var(--lt-text);
    font-size: .75rem;
    white-space: nowrap;
  }
  .map-activity-key.active { box-shadow: inset 0 -2px var(--activity-color); font-weight: 800; }
  .session-kpis {
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: .5rem;
    justify-self: end;
    inline-size: max-content;
    max-inline-size: 100%;
  }
  .session-kpis div {
    display: grid;
    gap: .08rem;
    padding-inline: .55rem;
    border-inline-start: 1px solid var(--lt-border);
  }
  .session-kpis span {
    color: var(--lt-muted);
    font-size: .7rem;
    text-transform: uppercase;
  }
  .session-kpis strong {
    font-variant-numeric: tabular-nums;
  }
  .session-kpis.comparison-kpis {
    display: grid;
    grid-template-columns: auto;
    align-items: center;
    gap: .75rem;
    min-inline-size: 0;
  }
  .comparison-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(4rem, 1fr));
    gap: .35rem;
  }
  .comparison-times {
    display: flex;
    gap: .65rem;
    min-inline-size: 0;
    overflow-x: auto;
  }
  .comparison-time {
    display: grid;
    gap: .05rem;
    min-inline-size: 3.6rem;
    padding-inline-start: .55rem;
    border-inline-start: 1px solid var(--lt-border);
    text-align: center;
    font-variant-numeric: tabular-nums;
  }
  .comparison-time strong {
    font-size: .75rem;
  }
  .comparison-time span {
    color: var(--lt-muted);
    font-size: .78rem;
    white-space: nowrap;
  }
  .view-tabs {
    display: flex;
    gap: .2rem;
    padding: .45rem 1rem 0;
    border-block-end: 1px solid var(--lt-border);
    background: var(--lt-surface);
    overflow-x: auto;
  }
  .view-tab {
    min-block-size: 2.55rem;
    padding: .45rem .8rem;
    border: 0;
    border-block-end: 3px solid transparent;
    border-radius: 0;
    background: transparent;
    color: var(--lt-muted);
    white-space: nowrap;
  }
  .view-tab[aria-selected="true"] {
    border-color: var(--lt-brand);
    color: var(--lt-text);
    font-weight: 780;
  }
  .tuning-strip {
    display: grid;
    grid-template-columns: minmax(10rem, .28fr) minmax(0, 1fr) minmax(10rem, .18fr);
    gap: .75rem;
    align-items: center;
    padding: .75rem 1rem;
    border-block-end: 1px solid var(--lt-border);
    background: light-dark(#fbfcfd, #141922);
  }
  .tuning-strip.collapsed lt-range-slider,
  .tuning-strip.collapsed .smoothing-control,
  .tuning-strip.collapsed .subtle {
    display: none;
  }
  .smoothing-control {
    display: grid;
    gap: .22rem;
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .chart-smoothing {
    display: grid;
    gap: .22rem;
    min-inline-size: 10rem;
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .lap-overlap-control {
    display: grid;
    gap: .22rem;
    color: var(--lt-muted);
    font-size: .72rem;
    min-inline-size: 9rem;
  }
  .lap-overlap-control input {
    inline-size: 100%;
    min-inline-size: 0;
    padding: .35rem .45rem;
    border: 1px solid var(--lt-border);
    border-radius: .35rem;
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .ghost-action {
    padding: .35rem .72rem;
    border-color: var(--lt-border);
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .app-main {
    display: grid;
    gap: 1rem;
    inline-size: min(1480px, calc(100% - 2rem));
    margin-inline: auto;
    padding-block: 1rem;
  }
  .analysis-view {
    display: none;
  }
  .analysis-view.active {
    display: grid;
    gap: 1rem;
  }
  .summary-grid,
  .map-view-grid,
  .charts-view-grid,
  .lap-view-grid,
  .section-view-grid {
    display: grid;
    grid-template-columns: minmax(20rem, .72fr) minmax(0, 1.28fr);
    gap: 1rem;
    align-items: start;
  }
  .lap-view-grid {
    grid-template-columns: minmax(15rem, .25fr) minmax(0, .75fr);
  }
  .panel {
    padding: 0;
    overflow: hidden;
  }
  .panel > :not(.panel-header):not(header):not(lt-activity-map):not(.map-footer):not(.lap-review-list):not(.selection-list) {
    margin: 1rem;
  }
  .panel-header,
  .panel > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    min-block-size: 3.05rem;
    padding: .65rem .75rem;
    border-block-end: 1px solid var(--lt-border);
    background: var(--lt-surface-strong);
  }
  .panel-header h2,
  .panel > header h2 {
    margin: 0;
    font-size: .98rem;
  }
  .ai-prompt-panel {
    display: grid;
    gap: .45rem;
  }
  .ai-prompt-button {
    flex: 0 0 auto;
    background: var(--lt-accent);
    color: white;
    font-weight: 750;
  }
  .ai-prompt-button:hover { background: var(--lt-brand-dark); color: white; }
  .ai-prompt-status { min-block-size: 1.2em; }
  .ai-prompt-strava-inline { margin-block: .25rem 0; }
  .activity-details-dialog {
    inline-size: min(30rem, calc(100vw - 2rem));
    padding: 0;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .activity-details-dialog form { display: grid; gap: .75rem; padding: 1rem; }
  .activity-details-dialog label { display: grid; gap: .3rem; font-weight: 700; }
  .activity-details-dialog input,
  .activity-details-dialog textarea { inline-size: 100%; padding: .5rem .6rem; border: 1px solid var(--lt-border); border-radius: .35rem; background: var(--lt-surface); color: var(--lt-text); font: inherit; }
  .activity-details-dialog::backdrop { background: rgb(8 16 30 / 55%); }
  .activity-details-dialog .icon-action { background: var(--lt-surface-strong); color: var(--lt-text); border-color: var(--lt-border); }
  .ai-prompt-dialog { max-inline-size: min(34rem, calc(100% - 2rem)); }
  .ai-prompt-dialog ul { margin-block: .5rem 1rem; padding-inline-start: 1.25rem; }
  .ai-prompt-dialog {
    inline-size: min(34rem, calc(100vw - 2rem));
    max-block-size: calc(100vh - 2rem);
    padding: 0;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .ai-prompt-dialog::backdrop { background: rgb(8 16 30 / 55%); }
  .ai-prompt-dialog .icon-action {
    background: var(--lt-surface-strong);
    color: var(--lt-text);
    border-color: var(--lt-border);
  }
  .share-dialog {
    inline-size: min(42rem, calc(100vw - 2rem));
    max-block-size: calc(100vh - 2rem);
    padding: 0;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .share-dialog::backdrop { background: rgb(8 16 30 / 55%); }
  .share-dialog > .panel { margin: 0; border: 0; }
  .share-dialog .icon-action { background: var(--lt-surface-strong); color: var(--lt-text); border-color: var(--lt-border); }
  .share-form { display: grid; gap: .75rem; }
  .share-form label { display: grid; gap: .35rem; font-weight: 700; }
  .share-form input, .share-form textarea { inline-size: 100%; padding: .55rem .65rem; font: inherit; }
  .share-form .checkbox-control {
    display: flex;
    align-items: center;
    gap: .5rem;
    white-space: normal;
  }
  .share-form .checkbox-control input {
    inline-size: auto;
    padding: 0;
    margin: 0;
    flex: 0 0 auto;
  }
  .share-restriction {
    display: grid;
    gap: .6rem;
    margin-block-end: 1rem;
    padding: .85rem;
    border: 1px solid var(--lt-border);
    border-radius: .4rem;
    background: var(--lt-surface-strong);
  }
  .share-restriction h3 { margin: 0; }
  .share-submit {
    border: 0;
    background: var(--lt-accent);
    color: white;
    font-weight: 800;
  }
  .share-submit:hover { background: var(--lt-brand-dark); border-color: transparent; }
  .share-list { display: grid; gap: .5rem; max-block-size: 14rem; overflow: auto; }
  .share-row { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: .5rem; padding: .6rem; border: 1px solid var(--lt-border); border-radius: .4rem; }
  .share-row strong, .share-row span { display: block; }
  .share-row span { color: var(--lt-muted); font-size: .8rem; }
  @media (max-width: 600px) {
    .share-row { grid-template-columns: 1fr; }
  }
  .map-controls {
    align-items: end;
  }
  .control-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(7rem, 1fr)) minmax(10rem, 1.25fr);
    gap: .55rem;
    align-items: end;
    inline-size: min(54rem, 100%);
  }
  .control-grid label,
  .charts label {
    display: grid;
    gap: .22rem;
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .control-grid .checkbox-control {
    display: flex;
    align-items: center;
    gap: .35rem;
    white-space: nowrap;
  }
  .control-grid .checkbox-control input {
    flex: 0 0 auto;
    margin: 0;
  }
  .control-grid select,
  .charts input {
    inline-size: 100%;
    min-block-size: 2rem;
    padding: .28rem .45rem;
  }
  .map-panel {
    position: relative;
    display: grid;
    grid-template-rows: auto minmax(36rem, 1fr) auto;
  }
  .map-stage {
    position: relative;
    min-block-size: 36rem;
  }
  .map-stage lt-activity-map {
    block-size: 100%;
    border: 0;
    border-radius: 0;
  }
  .map-footer {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
    align-items: center;
    padding: .65rem .75rem;
    border-block-start: 1px solid var(--lt-border);
  }
  .playback-overlay {
    position: absolute;
    inset-inline-end: .375rem;
    inset-block-start: .375rem;
    z-index: 3;
    pointer-events: none;
    background: transparent;
  }
  .playback-overlay lt-playback-controls {
    pointer-events: auto;
  }
  .playback-overlay lt-playback-legend {
    pointer-events: auto;
  }
  .lap-review-list,
  .selection-panel > div {
    display: grid;
    gap: .55rem;
    padding: .75rem;
  }
  .lap-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: .75rem;
    align-items: center;
    padding: .65rem;
    border: 1px solid var(--lt-border);
    border-radius: .45rem;
    background: var(--lt-surface);
    cursor: pointer;
  }
  .lap-card.active {
    border-color: color-mix(in srgb, var(--lt-brand) 55%, var(--lt-border));
    background: color-mix(in srgb, var(--lt-brand) 8%, var(--lt-surface));
  }
  .lap-no {
    display: grid;
    place-items: center;
    inline-size: 2.35rem;
    block-size: 2.35rem;
    border-radius: 50%;
    background: var(--lt-surface-strong);
    font-weight: 850;
  }
  .lap-card.active .lap-no {
    background: var(--lt-brand);
    color: white;
  }
  .lap-main {
    display: grid;
    gap: .3rem;
    min-inline-size: 0;
  }
  .sector-strip {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: .18rem;
    block-size: .44rem;
  }
  .sector-strip span {
    border-radius: 999px;
    background: var(--lt-border);
    cursor: pointer;
  }
  .sector-strip span.selected {
    outline: 2px solid var(--lt-brand);
    outline-offset: 2px;
  }
  .sector-strip span:focus-visible {
    outline: 2px solid var(--lt-accent);
    outline-offset: 2px;
  }
  .fast,
  .sector-strip .fast {
    color: var(--lt-green);
    background: var(--lt-green);
  }
  .near,
  .sector-strip .near {
    color: var(--lt-yellow);
    background: var(--lt-yellow);
  }
  .lost,
  .sector-strip .lost {
    color: #ef2b23;
    background: #ef2b23;
  }
  .off,
  .sector-strip .off {
    color: var(--lt-border);
    background: var(--lt-border);
  }
  .mini-legend {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    color: var(--lt-muted);
    font-size: .74rem;
  }
  .mini-legend span {
    display: inline-flex;
    align-items: center;
    gap: .28rem;
    background: transparent;
  }
  .mini-legend span::before {
    content: "";
    inline-size: .62rem;
    block-size: .62rem;
    border-radius: 50%;
    background: currentColor;
  }
  .lap-time {
    text-align: end;
    font-variant-numeric: tabular-nums;
  }
  .lap-time strong {
    display: block;
    font-size: 1.08rem;
  }
  .lap-time span {
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: .65rem;
  }
  .metric {
    display: grid;
    gap: .18rem;
    padding: .68rem;
    border: 1px solid var(--lt-border);
    border-radius: .42rem;
    background: var(--lt-surface);
  }
  .metric span {
    color: var(--lt-muted);
    font-size: .72rem;
  }
  .metric strong {
    font-size: 1.2rem;
    font-variant-numeric: tabular-nums;
  }
  .table-shell {
    overflow: auto;
    border: 1px solid var(--lt-border);
    border-radius: .5rem;
  }
  .table-shell table {
    inline-size: 100%;
    border-collapse: collapse;
    min-inline-size: 42rem;
    font-size: .84rem;
  }
  .table-shell th,
  .table-shell td {
    padding: .52rem .62rem;
    border-block-end: 1px solid var(--lt-border);
    text-align: end;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
  }
  .table-shell th:first-child,
  .table-shell td:first-child {
    text-align: start;
    font-variant-numeric: normal;
  }
  .table-shell th {
    color: var(--lt-muted);
    background: var(--lt-surface-strong);
  }
  .activity-analysis-table thead tr:first-child th {
    border-block-end: 0;
    text-align: center;
  }
  .activity-analysis-table thead tr:first-child th:not(:first-child) {
    border-inline-start: 1px solid var(--lt-border);
  }
  .activity-analysis-table thead tr:nth-child(2) th.group-start {
    border-inline-start: 1px solid var(--lt-border);
  }
  .table-shell tr.active {
    background: color-mix(in srgb, var(--lt-brand) 8%, transparent);
  }
  .select-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: .5rem;
    align-items: center;
    padding: .55rem .6rem;
    border: 1px solid var(--lt-border);
    border-radius: .38rem;
    background: var(--lt-surface);
    color: var(--lt-text);
    text-align: start;
    font-size: .84rem;
  }
  .select-row.active {
    border-color: color-mix(in srgb, var(--lt-brand) 55%, var(--lt-border));
    background: color-mix(in srgb, var(--lt-brand) 8%, var(--lt-surface));
  }
  .select-row strong {
    font-variant-numeric: tabular-nums;
  }
  .selection-stats {
    display: grid;
    gap: .1rem;
    color: var(--lt-muted);
    font-size: .68rem;
    line-height: 1.15;
    text-align: end;
    white-space: nowrap;
  }
  .chart-stack {
    padding: .75rem;
  }
  @media (width < 1100px) {
    .appbar,
    .session-strip,
    .tuning-strip,
    .summary-grid,
    .map-view-grid,
    .charts-view-grid,
    .lap-view-grid,
    .section-view-grid {
      grid-template-columns: 1fr;
    }
    .control-grid,
    .metric-grid,
    .session-kpis {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }
  @media (width < 680px) {
    .app-main {
      inline-size: min(100% - 1rem, 1480px);
    }
    .control-grid,
    .metric-grid,
    .session-strip,
    .session-strip.comparison-summary,
    .session-kpis,
    .session-kpis.comparison-kpis,
    .comparison-metrics,
    .map-footer,
    .lap-card {
      grid-template-columns: 1fr;
    }
    .lap-time {
      text-align: start;
    }
    .session-kpis {
      inline-size: 100%;
    }
    .map-panel {
      grid-template-rows: auto minmax(28rem, 1fr) auto;
    }
    .map-stage {
      min-block-size: 28rem;
    }
  }
  body {
    min-block-size: 100svh;
    background: var(--lt-bg);
    color: var(--lt-text);
  }
  a { color: var(--lt-accent); }
  button, input, select { font: inherit; }
  button {
    padding: .55rem .75rem;
    border: 1px solid var(--lt-border);
    border-radius: .4rem;
    background: var(--lt-surface);
    color: var(--lt-text);
    cursor: pointer;
    touch-action: manipulation;
  }
  button:hover { border-color: var(--lt-accent); }
  button:focus-visible, input:focus-visible, select:focus-visible {
    outline: 2px solid var(--lt-accent);
    outline-offset: 2px;
  }
  input, select {
    border: 1px solid var(--lt-border);
    border-radius: .4rem;
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  mark {
    padding: 0;
    background: linear-gradient(to right, rgb(88,132,225), rgb(120,166,90), rgb(255,255,84), rgb(140,26,245), rgb(241,158,56), rgb(234,51,35));
    background-clip: text;
    color: transparent;
  }
  sup {
    margin-inline-start: .25rem;
    color: var(--lt-muted);
    font-size: .35em;
    vertical-align: super;
  }
}

@layer layout {
  .container {
    inline-size: min(1180px, calc(100% - 2rem));
    margin-inline: auto;
  }
  .site-header {
    padding-block: clamp(1.25rem, 4vw, 3rem) 1rem;
  }
  .site-header h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    line-height: 1;
    letter-spacing: 0;
  }
  .site-header p {
    margin-block-start: .75rem;
    color: var(--lt-muted);
  }
  main {
    display: grid;
    gap: 1rem;
  }
  .intro {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr));
    gap: 1rem;
  }
  .intro-column {
    display: grid;
    align-content: start;
    gap: 1rem;
  }
  .strava-loader {
    display: grid;
    gap: .65rem;
    padding: 1rem;
    border: 2px solid var(--lt-accent);
    border-radius: .5rem;
    background: color-mix(in srgb, var(--lt-accent) 8%, var(--lt-surface));
  }
  .strava-loader span { font-weight: 750; }
  .strava-loader small { color: var(--lt-muted); }
  .strava-browse-button {
    inline-size: fit-content;
    padding: .7rem 1rem;
    border: 0;
    border-radius: .4rem;
    background: var(--lt-accent);
    color: white;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
  }
  .strava-browse-button:hover { background: var(--lt-brand-dark); }
  .workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(20rem, .9fr);
    gap: 1rem;
    align-items: start;
  }
  .map-panel, .charts {
    container-type: inline-size;
  }
  .chart-stack {
    display: grid;
    gap: .75rem;
  }
  .toolbar {
    display: grid;
    grid-template-columns: minmax(12rem, .4fr) 1fr auto;
    gap: 1rem;
    align-items: center;
  }
  .inline-controls {
    display: flex;
    gap: .75rem;
    align-items: center;
    justify-content: space-between;
    margin-block-end: .75rem;
  }
  .inline-controls label {
    display: flex;
    gap: .5rem;
    align-items: center;
  }
  .step-controls {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    justify-content: end;
  }
  .step-controls button[hidden] {
    display: none;
  }
  .site-footer {
    padding-block: 2rem;
    color: var(--lt-muted);
    font-size: .85rem;
  }
  .site-footer .footer-links {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
  }
  .site-footer .footer-links p {
    margin-block: 0;
  }
  @media (max-width: 600px) {
    .site-footer .footer-links {
      align-items: flex-start;
      flex-direction: column;
      gap: .35rem;
    }
  }
  .footer-secret {
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    font: inherit;
    text-decoration: none;
    cursor: pointer;
  }
  .footer-secret:hover,
  .footer-secret:focus-visible {
    color: var(--lt-text);
  }
  .strava-dialog {
    inline-size: min(42rem, calc(100vw - 2rem));
    max-block-size: calc(100vh - 2rem);
    padding: 0;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
    color: var(--lt-text);
  }
  .strava-dialog::backdrop {
    background: rgb(8 16 30 / 55%);
  }
  .strava-dialog > .panel {
    margin: 0;
    border: 0;
  }
  .strava-dialog .icon-action {
    background: var(--lt-surface-strong);
    color: var(--lt-text);
    border-color: var(--lt-border);
  }
  @media (width < 860px) {
    .appbar {
      grid-template-columns: 1fr auto;
    }
    .activity-toolbar {
      grid-column: 1 / -1;
      grid-row: 2;
    }
    .workspace, .toolbar {
      grid-template-columns: 1fr;
    }
    .step-controls {
      display: flex;
      flex-wrap: wrap;
      gap: .5rem;
    }
  }
}

@layer components {
  .panel {
    padding: 1rem;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface);
  }
  .panel > h2,
  .toolbar h2,
  .playback h2 {
    margin-block-end: .75rem;
    font-size: 1rem;
  }
  .notice {
    padding: .8rem 1rem;
    border: 1px solid var(--lt-border);
    border-radius: var(--lt-radius);
    background: var(--lt-surface-strong);
  }
  .notice.error {
    border-color: color-mix(in srgb, var(--lt-danger) 45%, var(--lt-border));
    color: var(--lt-danger);
  }
  .subtle {
    margin-block-start: .2rem;
    color: var(--lt-muted);
    font-size: .85rem;
  }
  .strava-form {
    display: grid;
    gap: .75rem;
    margin-block-start: .75rem;
  }
  .strava-form label {
    display: grid;
    gap: .35rem;
  }
  .strava-form input {
    padding: .55rem .65rem;
  }
  details {
    margin-block-start: .75rem;
  }
  summary {
    cursor: pointer;
    color: var(--lt-muted);
  }
}

@layer utilities {
  [hidden] { display: none !important; }
}