/* Refined cross-border wayfinding: national colours identify route endpoints;
   semantic colours alone communicate congestion. */

@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-weight: 400 800;
  font-stretch: 75% 125%;
  font-display: swap;
  src: url(fonts/archivo-latin.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-weight: 400 800;
  font-stretch: 75% 125%;
  font-display: swap;
  src: url(fonts/archivo-latin-ext.woff2) format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Barlow Semi Condensed";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/barlow-semi-condensed-600-latin.woff2) format("woff2");
}

@font-face {
  font-family: "Barlow Semi Condensed";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/barlow-semi-condensed-700-latin.woff2) format("woff2");
}

:root {
  --canvas: #f3f6f8;
  --surface: #ffffff;
  --surface-soft: #edf2f5;
  --ink: #0b1b2b;
  --muted: #5a6b7a;
  --line: #d5dfe6;
  --line-strong: #b8c6d0;

  --canada: #9d2235;
  --us: #002855;

  --light-ink: #0f6b3c;
  --light-bg: #e8f4ed;
  --moderate-ink: #7a4e00;
  --moderate-bg: #fff2cc;
  --heavy-ink: #a53212;
  --heavy-bg: #fdece5;
  --neutral-ink: #425466;
  --neutral-bg: #e9eef2;
  --error-ink: #8a2914;
  --error-bg: #fff0ea;
  --focus: #3478e5;

  --body: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Barlow Semi Condensed", "Archivo", sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0d1117;
    --surface: #151b23;
    --surface-soft: #1c2530;
    --ink: #e9eef3;
    --muted: #aab7c3;
    --line: #2d3743;
    --line-strong: #455261;

    --canada: #e0708a;
    --us: #7aa2f7;

    --light-ink: #66dfa0;
    --light-bg: #163526;
    --moderate-ink: #f5c542;
    --moderate-bg: #3d3012;
    --heavy-ink: #ff9a72;
    --heavy-bg: #43251d;
    --neutral-ink: #c5d0da;
    --neutral-bg: #293441;
    --error-ink: #ffad8f;
    --error-bg: #47261d;
    --focus: #3478e5;
    color-scheme: dark;
  }
}

body[data-direction="to-us"] {
  --route-origin: var(--canada);
  --route-destination: var(--us);
}

body[data-direction="to-canada"] {
  --route-origin: var(--us);
  --route-destination: var(--canada);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 280px;
  min-height: 100dvh;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

button,
summary {
  font: inherit;
}

button {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 8px;
  left: 8px;
  min-height: 44px;
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--surface);
  transform: translateY(-140%);
  transition: transform 150ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

:where(button, summary):focus-visible {
  outline: 0;
  box-shadow: inset 0 0 0 3px var(--focus);
}

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

.shell {
  width: min(100%, 1320px);
  margin: 0 auto;
  padding:
    calc(28px + env(safe-area-inset-top))
    calc(clamp(18px, 3.2vw, 42px) + env(safe-area-inset-right))
    calc(24px + env(safe-area-inset-bottom))
    calc(clamp(18px, 3.2vw, 42px) + env(safe-area-inset-left));
}

/* Header and route */

.masthead {
  display: grid;
  gap: 20px;
}

.masthead-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  flex: 0 1 auto;
}

.brand h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(38px, 4.4vw, 56px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.025em;
}

.brand p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.direction-block {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.segmented {
  display: flex;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  overflow: hidden;
}

.segmented button {
  appearance: none;
  min-width: 44px;
  min-height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.1;
  white-space: nowrap;
  cursor: pointer;
  transition: color 150ms ease, background-color 150ms ease;
}

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

.segmented button:hover:not([aria-pressed="true"]) {
  background: var(--surface-soft);
  color: var(--ink);
}

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

.source-status {
  min-height: 18px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.route-strip {
  display: grid;
  grid-template-columns: max-content minmax(30px, 1fr) max-content;
  align-items: center;
  gap: 12px;
  min-height: 24px;
}

.route-place {
  color: var(--route-origin);
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.route-destination {
  color: var(--route-destination);
  text-align: right;
}

.route-track {
  position: relative;
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--route-origin), var(--route-destination));
}

.route-track::before,
.route-track::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  border: 2px solid var(--canvas);
  border-radius: 50%;
  transform: translateY(-50%);
}

.route-track::before {
  left: -1px;
  background: var(--route-origin);
}

.route-track::after {
  right: -1px;
  background: var(--route-destination);
}

.route-arrow {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--route-destination);
  filter: drop-shadow(-2px 0 0 var(--canvas));
  transform: translate(-50%, -50%);
}

/* Travel mode */

.mode-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 22px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.mode-heading {
  min-width: max-content;
}

.mode-heading h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.mode-heading p {
  margin: 1px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.mode-selector button {
  min-width: 82px;
}

.agency-notice {
  margin: 12px 0 0;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--neutral-bg);
  color: var(--neutral-ink);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  text-wrap: balance;
}

.agency-notice[data-tone="late"] {
  border-color: color-mix(in srgb, var(--moderate-ink) 35%, transparent);
  background: var(--moderate-bg);
  color: var(--moderate-ink);
}

/* Comparison board */

main {
  margin-top: 18px;
}

.crossings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.crossing-card {
  min-width: 0;
  min-height: 268px;
  padding: 22px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--route-origin);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgb(11 27 43 / 5%);
}

@media (prefers-color-scheme: dark) {
  .crossing-card {
    box-shadow: none;
  }
}

.card-header h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(24px, 2.4vw, 31px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.card-stamp {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px 8px;
  min-height: 22px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.freshness {
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--light-bg);
  color: var(--light-ink);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.25;
}

.freshness[data-freshness="late"] {
  background: var(--moderate-bg);
  color: var(--moderate-ink);
}

.freshness[data-freshness="stale"],
.freshness[data-freshness="disconnected"],
.freshness[data-freshness="missing"] {
  background: var(--neutral-bg);
  color: var(--neutral-ink);
}

.card-metric {
  margin-top: 25px;
}

.selected-mode {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.reading-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px 12px;
}

.wait-display {
  display: flex;
  align-items: baseline;
  gap: 7px;
  min-width: 0;
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.wait-value {
  font-size: clamp(50px, 5vw, 64px);
  font-weight: 740;
  line-height: 0.92;
  letter-spacing: -0.045em;
}

.wait-unit {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.crossing-card[data-state="closed"] .wait-value,
.crossing-card[data-state="unavailable"] .wait-value,
.crossing-card[data-state="unsupported"] .wait-value,
.crossing-card[data-state="missing"] .wait-value {
  max-width: 16ch;
  font-family: var(--display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
}

.severity {
  margin: 0;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--neutral-bg);
  color: var(--neutral-ink);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-transform: uppercase;
}

.crossing-card[data-level="good"] .severity {
  background: var(--light-bg);
  color: var(--light-ink);
}

.crossing-card[data-level="moderate"] .severity {
  background: var(--moderate-bg);
  color: var(--moderate-ink);
}

.crossing-card[data-level="heavy"] .severity {
  background: var(--heavy-bg);
  color: var(--heavy-ink);
}

.card-details {
  display: grid;
  gap: 7px;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.card-details p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.lanes {
  font-weight: 650;
}

.history-cue[data-trend]::before {
  content: "↗";
  display: inline-block;
  width: 16px;
  color: var(--muted);
}

.history-cue[data-trend="down"]::before {
  content: "↘";
}

.history-cue[data-trend="flat"]::before {
  content: "→";
}

.crossing-card.is-loading .wait-display {
  width: 112px;
  height: 49px;
  border-radius: 8px;
  background: var(--surface-soft);
  color: transparent;
}

.crossing-card.is-loading .selected-mode {
  color: var(--muted);
}

.error-panel {
  padding: clamp(24px, 5vw, 44px);
  border: 1px solid color-mix(in srgb, var(--error-ink) 28%, transparent);
  border-radius: 14px;
  background: var(--error-bg);
  color: var(--error-ink);
  text-align: center;
}

.error-panel h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 28px;
  line-height: 1;
}

.error-panel p {
  margin: 8px 0 18px;
}

.error-panel button {
  min-width: 120px;
  min-height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 8px;
  background: var(--ink);
  color: var(--surface);
  font-weight: 700;
  cursor: pointer;
}

/* Footer */

.footer {
  margin-top: 28px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.about {
  max-width: 66ch;
  margin: 0 auto;
}

.about summary {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
}

.about-copy {
  padding: 0 4px 8px;
}

.about-copy p,
.sources p {
  max-width: 66ch;
  margin: 8px auto 0;
}

.footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.footer a:hover {
  color: var(--ink);
}

.sources {
  text-align: center;
}

@media (max-width: 959px) {
  .crossings {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .crossing-card {
    min-height: 0;
    padding: 15px 17px;
    border-top-width: 3px;
  }

  .card-header h3 {
    font-size: 23px;
  }

  .card-stamp {
    margin-top: 4px;
  }

  .card-metric {
    margin-top: 9px;
  }

  .wait-value {
    font-size: 44px;
  }

  .crossing-card[data-state="closed"] .wait-value,
  .crossing-card[data-state="unavailable"] .wait-value,
  .crossing-card[data-state="unsupported"] .wait-value,
  .crossing-card[data-state="missing"] .wait-value {
    font-size: 26px;
  }

  .card-details {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 4px 18px;
    margin-top: 9px;
    padding-top: 8px;
  }

  .crossing-card.is-loading .wait-display {
    width: 96px;
    height: 40px;
  }
}

@media (max-width: 719px) {
  .shell {
    padding:
      calc(16px + env(safe-area-inset-top))
      calc(14px + env(safe-area-inset-right))
      calc(20px + env(safe-area-inset-bottom))
      calc(14px + env(safe-area-inset-left));
  }

  .masthead {
    gap: 13px;
  }

  .masthead-row {
    display: grid;
    gap: 11px;
  }

  .brand h1 {
    font-size: 36px;
  }

  .brand p {
    margin-top: 3px;
    font-size: 13px;
  }

  .direction-block {
    justify-items: stretch;
    gap: 5px;
  }

  .direction-selector {
    width: 100%;
  }

  .direction-selector button {
    flex: 1 1 50%;
    padding: 0 8px;
    font-size: 13px;
  }

  .source-status {
    text-align: left;
  }

  .route-strip {
    gap: 8px;
  }

  .route-place {
    font-size: 10px;
  }

  .mode-control {
    display: grid;
    gap: 7px;
    margin-top: 13px;
    padding: 8px;
  }

  .mode-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }

  .mode-selector {
    width: 100%;
  }

  .mode-selector button {
    flex: 1 1 0;
    min-width: 44px;
    padding: 0 5px;
    font-size: 13px;
  }

  main {
    margin-top: 11px;
  }

  .agency-notice {
    margin-top: 8px;
  }

  .footer {
    margin-top: 18px;
  }
}

@media (max-width: 359px) {
  .brand h1 {
    font-size: 33px;
  }

  .card-header h3 {
    font-size: 21px;
  }

  .freshness {
    border-radius: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
}