/* Real-time travel in the bay
   One type family (Overpass, born from US highway-sign lettering, plus its
   mono sibling for numerals). Two themes that are literally day and night
   over the same road atlas: night = sodium-lit freeways on ink, day = the
   printed atlas look, persimmon highways on warm paper. */

:root {
    --font-ui:   'Overpass', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Overpass Mono', ui-monospace, Menlo, monospace;

    --morph-t: 0;

    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 7px;

    --gap-1: 4px;
    --gap-2: 8px;
    --gap-3: 12px;
    --gap-4: 16px;
    --gap-5: 24px;
    --gap-6: 32px;
}

/* ---------- Night atlas ---------- */
:root[data-theme="dark"] {
    --bg-page:    #0b101d;
    --surface:    #121a2b;
    --surface-2:  #1a2438;
    --hairline:   #27314a;
    --hairline-2: #1b2439;
    --text:       #ece9df;
    --text-dim:   #a0a3a0;
    --text-mute:  #6f7375;
    --warm:       #e8ae4c;   /* sodium freeway glow */
    --warm-deep:  #b57f2b;
    --pop:        #ef8a5f;   /* route coral, interactive moments */
    --cool:       #8fc8d8;   /* bay teal, trips */
    --danger:     #d97052;

    --squiggle-start: #8fc8d8;
    --squiggle-end:   #ef8a5f;

    --panel-shadow: none;
    --glass: rgba(11, 16, 29, 0.65);
    --sw-motorway: #e8ae4c; --sw-trunk: #b58436; --sw-primary: #6a5a3d; --sw-secondary: #3a4762;
    --sw-glow: rgba(232, 174, 76, 0.5);
    --slider-gradient: linear-gradient(90deg, #2a3247 0%, #3d4360 30%, #6a5a3d 60%, #b58436 82%, #e8ae4c 100%);
    --thumb: #e8ae4c;
    --thumb-ring: rgba(232, 174, 76, 0.55);
    --page-glow-a: rgba(232, 174, 76, 0.035);
    --page-glow-b: rgba(143, 200, 216, 0.03);
}

/* ---------- Day atlas ---------- */
:root[data-theme="light"] {
    --bg-page:    #f1e9d6;
    --surface:    #faf5e8;
    --surface-2:  #ece3cc;
    --hairline:   #d9cdaf;
    --hairline-2: #e2d8bf;
    --text:       #2e2c24;
    --text-dim:   #6b675a;
    --text-mute:  #938d7c;
    --warm:       #c9531f;   /* printed-map highway persimmon */
    --warm-deep:  #a84418;
    --pop:        #d95f36;
    --cool:       #1d7a93;
    --danger:     #b8441f;

    --squiggle-start: #1d7a93;
    --squiggle-end:   #d95f36;

    --panel-shadow: 0 14px 34px rgba(94, 74, 32, 0.10);
    --glass: rgba(250, 245, 232, 0.75);
    --sw-motorway: #d95f36; --sw-trunk: #dd8f3c; --sw-primary: #c9995c; --sw-secondary: #a3a08e;
    --sw-glow: transparent;
    --slider-gradient: linear-gradient(90deg, #c3bda9 0%, #c9995c 45%, #dd8f3c 75%, #d95f36 100%);
    --thumb: #d95f36;
    --thumb-ring: rgba(217, 95, 54, 0.4);
    --page-glow-a: rgba(217, 95, 54, 0.05);
    --page-glow-b: rgba(29, 122, 147, 0.05);
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg-page);
    color: var(--text);
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 30% 15%, var(--page-glow-a), transparent 55%),
        radial-gradient(ellipse at 80% 90%, var(--page-glow-b), transparent 60%),
        var(--bg-page);
}

.boot-status {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-page);
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    z-index: 1000;
    transition: opacity 300ms ease-out;
}

.boot-status.hidden {
    opacity: 0;
    pointer-events: none;
}

.boot-status.error {
    color: var(--danger);
}

.page {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--gap-5) var(--gap-6) var(--gap-4);
    display: flex;
    flex-direction: column;
    gap: var(--gap-4);
    min-height: 100vh;
}

/* ---------- Masthead ---------- */

.masthead {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--gap-5);
    align-items: end;
    padding-bottom: var(--gap-4);
    border-bottom: 1px solid var(--hairline-2);
}

.masthead-title h1 {
    font-family: var(--font-ui);
    font-weight: 800;
    font-size: clamp(34px, 5.2vw, 56px);
    line-height: 1;
    letter-spacing: -0.025em;
    margin: 0;
    color: var(--text);
}

/* The signature: a little route that stretches as the map does.
   The path scales with the morph slider; the endpoint dots counter-scale
   so they stay round while the route between them grows. */
.route-squiggle {
    display: block;
    width: 190px;
    height: 20px;
    margin-top: 7px;
    overflow: visible;
    transform: scaleX(calc(1 + var(--morph-t) * 0.4));
    transform-origin: left center;
}

.route-squiggle circle {
    transform: scaleX(calc(1 / (1 + var(--morph-t) * 0.4)));
    transform-box: fill-box;
    transform-origin: center;
}

.subline {
    margin: 8px 0 0 0;
    font-weight: 300;
    font-size: 14.5px;
    color: var(--text-dim);
    letter-spacing: 0.005em;
    max-width: 46ch;
}

.masthead-controls {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--gap-3);
}

.controls-row {
    display: flex;
    align-items: center;
    gap: var(--gap-3);
}

/* Mode toggle */

.mode-toggle {
    display: inline-flex;
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 999px;
    padding: 4px;
    gap: 2px;
    box-shadow: var(--panel-shadow);
}

.mode-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--gap-2);
    padding: 8px 16px 7px;
    border: 0;
    background: transparent;
    color: var(--text-dim);
    font-family: var(--font-ui);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: 999px;
    cursor: pointer;
    transition: color 180ms ease, background-color 180ms ease;
}

.mode-btn:hover {
    color: var(--text);
}

.mode-btn.active {
    background: var(--surface-2);
    color: var(--text);
    box-shadow: inset 0 0 0 1px var(--hairline);
}

.mode-btn[data-mode="friday"].active {
    color: var(--warm);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--warm) 35%, transparent);
    background: linear-gradient(180deg, color-mix(in srgb, var(--warm) 9%, transparent), transparent);
}

.mode-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-mute);
    padding: 2px 6px 1px;
    border: 1px solid var(--hairline);
    border-radius: 5px;
}

.mode-btn.active .mode-tag {
    color: var(--warm-deep);
    border-color: color-mix(in srgb, var(--warm) 35%, transparent);
}

/* Theme toggle (day / night) */

.theme-toggle {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 50%;
    color: var(--text-dim);
    cursor: pointer;
    transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
    box-shadow: var(--panel-shadow);
}

.theme-toggle:hover {
    color: var(--pop);
    border-color: color-mix(in srgb, var(--pop) 45%, transparent);
    transform: rotate(12deg);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }

/* Stress readout */

.stress-readout {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-mute);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
}

.stress-value {
    color: var(--text);
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 0.02em;
    text-transform: none;
}

.stress-mode {
    color: var(--text-mute);
    text-transform: none;
    font-size: 11px;
    letter-spacing: 0.02em;
    font-family: var(--font-ui);
}

/* Mode note */

.mode-note {
    margin: 0;
    padding: 0 2px;
    font-weight: 300;
    font-size: 14px;
    color: var(--text-dim);
    letter-spacing: 0.01em;
}

/* ---------- Stage: map + trips ---------- */

.stage {
    display: grid;
    grid-template-columns: 1fr 340px;
    grid-template-rows: minmax(480px, 1fr);
    gap: var(--gap-5);
    flex: 1;
    min-height: 0;
}

.map-wrap {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--hairline-2);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-width: 0;
    box-shadow: var(--panel-shadow);
    /* Definite height for the canvas child. Flex parent (.page) gives .stage
       a resolved height, grid-template-rows resolves the map-wrap row height. */
}

#map-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.xray-legend {
    position: absolute;
    bottom: 12px;
    left: 14px;
    font-size: 12px;
    color: var(--text-dim);
    opacity: 0;
    transition: opacity 200ms ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass);
    padding: 6px 10px;
    border: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(3px);
    pointer-events: none;
    max-width: 320px;
}

.xray-legend.visible {
    opacity: 1;
}

.dot-sample {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.7;
    display: inline-block;
    flex: none;
}

.road-legend {
    position: absolute;
    top: 12px;
    right: 14px;
    display: inline-grid;
    grid-template-columns: auto auto;
    gap: 4px 8px;
    align-items: center;
    background: var(--glass);
    padding: 8px 12px;
    border: 1px solid var(--hairline-2);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(3px);
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    pointer-events: none;
}

.road-swatch {
    width: 18px;
    height: 3px;
    display: inline-block;
    border-radius: 2px;
}

.swatch-motorway  { background: var(--sw-motorway); box-shadow: 0 0 6px var(--sw-glow); }
.swatch-trunk     { background: var(--sw-trunk); }
.swatch-primary   { background: var(--sw-primary); }
.swatch-secondary { background: var(--sw-secondary); }

.road-label {
    color: var(--text-mute);
}

/* ---------- Trips panel ---------- */

.trips-panel {
    background: var(--surface);
    border: 1px solid var(--hairline-2);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
    box-shadow: var(--panel-shadow);
}

.trips-header {
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--hairline-2);
}

.trips-header h2 {
    margin: 0;
    font-weight: 700;
    font-size: 17px;
    color: var(--text);
    letter-spacing: -0.005em;
}

.trips-hint {
    margin: 4px 0 0 0;
    font-size: 12px;
    font-weight: 300;
    color: var(--text-mute);
}

.trip-list {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 6px;
    gap: 2px;
}

.trip-row {
    display: block;
    width: 100%;
    text-align: left;
    background: transparent;
    color: var(--text);
    border: 0;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-ui);
    transition: background-color 140ms ease;
    position: relative;
}

.trip-row:hover {
    background: var(--surface-2);
}

.trip-row.selected {
    background: linear-gradient(90deg, color-mix(in srgb, var(--cool) 14%, transparent), color-mix(in srgb, var(--cool) 3%, transparent));
    box-shadow: inset 2px 0 0 var(--cool);
}

.trip-endpoints {
    display: flex;
    align-items: baseline;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.25;
    color: var(--text);
}

.trip-arrow {
    color: var(--text-mute);
    font-size: 12px;
    font-weight: 400;
}

.trip-metrics {
    margin-top: 6px;
    display: flex;
    align-items: baseline;
    gap: 14px;
    font-size: 12px;
    color: var(--text-mute);
}

.trip-metrics .num {
    font-family: var(--font-mono);
    color: var(--text);
    font-size: 13px;
    letter-spacing: 0.01em;
}

.trip-minutes .num {
    color: var(--warm);
    font-weight: 600;
}

.trip-metrics .unit {
    margin-left: 3px;
    color: var(--text-mute);
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.trip-delta {
    font-family: var(--font-mono);
    color: var(--text-mute);
    font-size: 11px;
    letter-spacing: 0.01em;
}

.trip-row.selected .trip-metrics .num,
.trip-row.selected .trip-minutes .num {
    color: var(--cool);
}

/* ---------- Morph bar (the hero interaction) ---------- */

.morph-bar {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: var(--gap-4);
    padding: var(--gap-4) var(--gap-4);
    background: var(--surface);
    border: 1px solid var(--hairline-2);
    border-radius: var(--radius-lg);
    box-shadow: var(--panel-shadow);
}

.morph-label {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: lowercase;
    color: var(--text-mute);
    white-space: nowrap;
    transition: color 200ms ease;
}

.morph-label-left {
    /* Fades toward muted as t -> 1. */
    color: color-mix(in oklab, var(--text) calc((1 - var(--morph-t)) * 100%), var(--text-mute));
    text-align: right;
}

.morph-label-right {
    color: color-mix(in oklab, var(--pop) calc(var(--morph-t) * 100%), var(--text-mute));
    text-align: left;
}

.slider-shell {
    position: relative;
    height: 46px;
    display: flex;
    align-items: center;
}

.slider-track-gradient {
    position: absolute;
    inset: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 5px;
    border-radius: 999px;
    background: var(--slider-gradient);
    box-shadow: 0 0 0 1px var(--hairline-2);
    pointer-events: none;
}

.slider-ticks {
    position: absolute;
    inset: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 12px;
    display: flex;
    justify-content: space-between;
    padding: 0 8px;
    pointer-events: none;
}

.slider-ticks span {
    display: block;
    width: 1px;
    height: 100%;
    background: var(--text-mute);
    opacity: 0.3;
}

.morph-slider {
    position: relative;
    z-index: 2;
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 46px;
    background: transparent;
    cursor: grab;
    margin: 0;
}

.morph-slider:active {
    cursor: grabbing;
}

.morph-slider::-webkit-slider-runnable-track {
    background: transparent;
    height: 46px;
}

.morph-slider::-moz-range-track {
    background: transparent;
    height: 46px;
}

.morph-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--thumb);
    border-radius: 50%;
    border: 3px solid var(--surface);
    margin-top: 11px;
    box-shadow:
        0 0 0 1px var(--thumb-ring),
        0 0 12px var(--thumb-ring);
    cursor: grab;
    transition: transform 100ms ease;
}

.morph-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--thumb);
    border-radius: 50%;
    border: 3px solid var(--surface);
    box-shadow:
        0 0 0 1px var(--thumb-ring),
        0 0 12px var(--thumb-ring);
    cursor: grab;
}

.morph-slider:active::-webkit-slider-thumb {
    transform: scale(1.12);
}

.morph-slider:focus {
    outline: none;
}

.morph-slider:focus-visible::-webkit-slider-thumb {
    box-shadow:
        0 0 0 2px var(--cool),
        0 0 12px var(--thumb-ring);
}

/* X-ray toggle */

.xray-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px 7px;
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--hairline);
    border-radius: 999px;
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 180ms ease;
}

.xray-toggle:hover {
    color: var(--text);
    border-color: var(--text-mute);
}

.xray-toggle.active {
    background: color-mix(in srgb, var(--cool) 10%, transparent);
    color: var(--cool);
    border-color: color-mix(in srgb, var(--cool) 40%, transparent);
}

.xray-glyph {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
    box-shadow:
        -14px 0 0 -3px currentColor,
        14px 0 0 -3px currentColor;
}

/* Keyboard focus for every control */

.mode-btn:focus-visible,
.theme-toggle:focus-visible,
.xray-toggle:focus-visible,
.trip-row:focus-visible,
.attribution a:focus-visible {
    outline: 2px solid var(--cool);
    outline-offset: 2px;
}

/* ---------- Footer ---------- */

.site-footer {
    padding-top: var(--gap-3);
    border-top: 1px solid var(--hairline-2);
}

.attribution {
    margin: 0;
    font-size: 12px;
    font-weight: 300;
    color: var(--text-mute);
    letter-spacing: 0.01em;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 10px;
    align-items: center;
    line-height: 1.5;
}

.footer-sep {
    color: var(--hairline);
}

.attribution a {
    color: var(--text-dim);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline);
    transition: color 160ms ease, border-color 160ms ease;
}

.attribution a:hover {
    color: var(--pop);
    border-color: var(--pop);
}

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

@media (max-width: 900px) {
    .page {
        padding: var(--gap-4) var(--gap-4) var(--gap-3);
        gap: var(--gap-3);
    }
    .stage {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        flex: none;
    }
    .map-wrap {
        aspect-ratio: 1 / 1.1;
        min-height: 0;
    }
    .trips-panel {
        max-height: 320px;
    }
    .masthead {
        grid-template-columns: 1fr;
        gap: var(--gap-4);
    }
    .masthead-controls {
        align-items: flex-start;
    }
    .morph-bar {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: var(--gap-3);
    }
    .slider-shell {
        grid-column: 1 / -1;
        order: 3;
    }
    .morph-label-left { order: 1; text-align: left; }
    .morph-label-right { order: 2; text-align: right; }
    .xray-toggle { order: 4; grid-column: 1 / -1; justify-self: start; }
}

@media (max-width: 480px) {
    .page {
        padding: var(--gap-3) var(--gap-3) var(--gap-2);
    }
    .masthead-title h1 {
        font-size: clamp(30px, 10.5vw, 40px);
    }
    .route-squiggle {
        width: 150px;
    }
    .stress-readout .stress-value { font-size: 14px; }
    .road-legend {
        display: none;
    }
    .trip-metrics {
        gap: 10px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
    }
}