/* Weather streaming dashboard.
   No frameworks, no external requests: the whole page is three files so it can
   sit on the Static Web Apps free tier and load instantly. */

:root {
  color-scheme: light dark;

  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #14181f;
  --text-dim: #5c6672;
  --accent: #2563eb;
  --ok: #128a5b;
  --warn: #b45309;
  --crit: #c0392f;
  --shadow: 0 1px 2px rgb(20 24 31 / 6%), 0 4px 16px rgb(20 24 31 / 5%);

  /* Series colours: distinguishable in both themes and for common colour
     vision deficiencies. */
  --s1: #2563eb;
  --s2: #d97706;
  --s3: #0d9488;
  --s4: #9333ea;
  --s5: #be123c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --surface-2: #1c2230;
    --border: #2a313c;
    --text: #e6edf3;
    --text-dim: #97a3b1;
    --accent: #60a5fa;
    --ok: #3fb984;
    --warn: #e0a458;
    --crit: #f2705f;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 4px 16px rgb(0 0 0 / 30%);

    --s1: #60a5fa;
    --s2: #fbbf24;
    --s3: #2dd4bf;
    --s4: #c084fc;
    --s5: #fb7185;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-radius: 6px;
}

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.masthead__inner {
  /* Matches main's width so the title's left edge and the Live badge's right
     edge line up with the content and the assistant rail below. */
  max-width: 1260px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem;
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}

.masthead h1 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
}

.masthead__sub {
  margin: 0.4rem 0 0;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: 0.9375rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.8125rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  flex: none;
}

.status__dot[data-state="live"] {
  background: var(--ok);
  animation: pulse 2.4s ease-in-out infinite;
}

.status__dot[data-state="error"] {
  background: var(--crit);
}

.status__dot[data-state="stale"] {
  background: var(--warn);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

@media (prefers-reduced-motion: reduce) {
  .status__dot[data-state="live"] {
    animation: none;
  }
}

/* ---------- layout ---------- */

main {
  max-width: 1260px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: grid;
  /* Content on the left, a fixed-width assistant rail on the right. */
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 2rem;
  align-items: start;
}

.main__content {
  /* Explicit placement, so the assistant sits on the right even though it
     comes first in the DOM — first-in-DOM is what stacks it on top on mobile. */
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  min-width: 0;
}

/* The assistant stays in view as the page scrolls — it is the one part of the
   dashboard that speaks to "right now", so it should not scroll away. */
.assistant {
  grid-column: 2;
  grid-row: 1;
  position: sticky;
  top: 1.5rem;
}

@media (max-width: 880px) {
  main {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .main__content,
  .assistant {
    grid-column: 1;
  }
  .main__content {
    grid-row: 2;
  }
  .assistant {
    grid-row: 1; /* assistant on top on narrow screens */
    position: static;
  }
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.section-head h2 {
  font-size: 1.0625rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 600;
}

.section-head__meta {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.empty {
  color: var(--text-dim);
  font-size: 0.9375rem;
  margin: 0;
  padding: 1.5rem;
  border: 1px dashed var(--border);
  border-radius: 12px;
  text-align: center;
}

/* ---------- location cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.125rem 1.25rem 1rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.card__place {
  font-size: 1rem;
  font-weight: 650;
}

.card__country {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

.card__temp {
  font-size: 2rem;
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1;
}

.card__condition {
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-top: -0.375rem;
}

.metrics {
  display: grid;
  /* Falls to one column when the card is narrow, rather than wrapping values
     onto a second line mid-unit. */
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.5rem 1rem;
  margin: 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.metric {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.metric dt {
  color: var(--text-dim);
}

.metric dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 550;
  white-space: nowrap;
}

.card__foot {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.pill {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.pill--ok {
  background: color-mix(in srgb, var(--ok) 14%, transparent);
  color: var(--ok);
}

.pill--warn {
  background: color-mix(in srgb, var(--warn) 16%, transparent);
  color: var(--warn);
}

.pill--crit {
  background: color-mix(in srgb, var(--crit) 16%, transparent);
  color: var(--crit);
}

/* ---------- chart ---------- */

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.chart-scroll {
  overflow-x: auto;
}

.chart {
  min-width: 520px;
}

.chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart .axis text {
  font-size: 11px;
  fill: var(--text-dim);
}

.chart .gridline {
  stroke: var(--border);
  stroke-width: 1;
}

.chart .series {
  fill: none;
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.toggle-group {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.toggle {
  font: inherit;
  font-size: 0.8125rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
}

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

.toggle[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend__swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
}

/* ---------- breaches ---------- */

.breaches {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.breach {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: 10px;
  font-size: 0.875rem;
}

.breach[data-severity="critical"] {
  border-left-color: var(--crit);
}

.breach__msg {
  flex: 1;
  min-width: 0;
}

.breach__time {
  color: var(--text-dim);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8125rem;
}

.footer p {
  margin: 0.25rem 0;
}

.footer__meta {
  font-variant-numeric: tabular-nums;
  opacity: 0.75;
}


/* ---------- advice card ---------- */
/* Rendered above the conditions grid, and removed from the flow entirely when
   there is nothing to say — an empty placeholder is worse than no feature. */

/* The assistant panel is permanent: it holds either the idle welcome or a live
   advice card, and never collapses to nothing. */
.assistant__slot {
  display: block;
}

/* Idle state — shown whenever there is nothing to advise. */
.assistant-welcome {
  padding: 1.125rem 1.125rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.assistant-welcome__row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.assistant-welcome__icon {
  flex: none;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  font-size: 1.15rem;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.assistant-welcome__title {
  margin: 0 0 0.2rem;
  font-size: 0.9375rem;
  font-weight: 650;
}

.assistant-welcome__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-dim);
}

/* An honest reply shown when the user asks in calm weather: no card, but not
   silence either. */
.assistant-welcome__reply {
  margin: 0.75rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
  font-size: 0.8375rem;
  line-height: 1.55;
  color: var(--text-dim);
}

.advice {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
  padding: 1rem 1.125rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

/* Severity is a visual step, not a redesign: the left rule and the icon tint
   change, everything else stays identical. */
.advice[data-severity="warning"] {
  border-left-color: var(--warn);
}

.advice[data-severity="severe"] {
  border-left-color: var(--crit);
}

.advice__icon {
  flex: none;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  font-size: 1.1rem;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.advice[data-severity="warning"] .advice__icon {
  background: color-mix(in srgb, var(--warn) 16%, transparent);
}

.advice[data-severity="severe"] .advice__icon {
  background: color-mix(in srgb, var(--crit) 16%, transparent);
}

.advice__body {
  flex: 1;
  min-width: 0;
}

.advice__title {
  font-size: 0.9375rem;
  font-weight: 650;
  margin: 0 0 0.2rem;
}

.advice__message {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-dim);
}

.advice__evidence {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.advice__chip {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.advice__meta {
  margin-top: 0.5rem;
  font-size: 0.6875rem;
  color: var(--text-dim);
  opacity: 0.85;
  font-variant-numeric: tabular-nums;
}

.advice__actions {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  margin-top: 0.7rem;
}

.advice__button {
  font: inherit;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
}

.advice__button:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* Citations. Present only on a grounded card — a template card renders
   exactly as it did in v1.1, with no empty row left behind. */
.advice__sources {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: baseline;
}

.advice__source {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
}

.advice__source:hover,
.advice__source:focus-visible {
  text-decoration: none;
  border-bottom-style: solid;
}

/* Follow-up question. Shown only on a grounded card. */
.advice__ask {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.advice__ask-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.35rem 0.55rem;
  font: inherit;
  font-size: 0.82rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.advice__ask-input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.advice__ask-button {
  flex: 0 0 auto;
  padding: 0.35rem 0.8rem;
  font: inherit;
  font-size: 0.82rem;
  color: var(--surface);
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.advice__ask-button:hover {
  filter: brightness(1.08);
}