:root {
  --bg-0: #0a1929;
  --bg-1: #0d2438;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #f4f9ff;
  --text-dim: #8aa6c2;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.7);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 70% -10%, #134e6f 0%, transparent 55%),
    radial-gradient(900px 500px at 10% 110%, #0e7490 0%, transparent 50%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 24px;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Card ---------- */
.card {
  position: relative;
  width: min(420px, 100%);
  padding: 32px 28px 0;
  border-radius: 28px;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  isolation: isolate;
}

.card__head {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: 999px;
}

.badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 0 currentColor;
  transition: background 0.3s ease;
}

.badge__dot.is-ok    { background: var(--ok); }
.badge__dot.is-err   { background: var(--err); }
.badge__dot.is-load  { background: var(--accent); animation: pulse 1.4s ease-in-out infinite; }

@keyframes pulse {
  0%   { transform: scale(1);   opacity: 1; }
  50%  { transform: scale(1.5); opacity: 0.4; }
  100% { transform: scale(1);   opacity: 1; }
}

.title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ---------- Reading ---------- */
.reading {
  padding: 28px 0 48px;
  text-align: center;
}

.reading__value {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 6px;
}

.temp {
  font-size: clamp(72px, 22vw, 104px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #ffffff, #bfe6ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: opacity 0.25s ease;
}

.temp.is-stale { opacity: 0.35; }

.unit {
  margin-top: 14px;
  font-size: 28px;
  font-weight: 600;
  color: var(--accent);
}

.reading__meta {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-dim);
  min-height: 18px;
}

/* ---------- Waves ---------- */
.waves {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 64px;
  height: 90px;
  z-index: -1;
  opacity: 0.55;
  pointer-events: none;
}

.wave {
  position: absolute;
  left: -50%;
  width: 200%;
  height: 100%;
  background-repeat: repeat-x;
  border-radius: 42%;
}

.wave--1 {
  bottom: 0;
  background: radial-gradient(80% 80% at 50% 100%, var(--accent-soft), transparent 70%);
  animation: drift 9s linear infinite;
  opacity: 0.7;
}
.wave--2 {
  bottom: -8px;
  background: radial-gradient(80% 80% at 50% 100%, rgba(45, 212, 191, 0.14), transparent 70%);
  animation: drift 13s linear infinite reverse;
  opacity: 0.6;
}
.wave--3 {
  bottom: -16px;
  background: radial-gradient(80% 80% at 50% 100%, rgba(56, 189, 248, 0.10), transparent 70%);
  animation: drift 17s linear infinite;
  opacity: 0.5;
}

@keyframes drift {
  from { transform: translateX(0) rotate(0deg); }
  to   { transform: translateX(25%) rotate(360deg); }
}

/* ---------- Footer ---------- */
.card__foot {
  position: relative;
  margin: 0 -28px;
  padding: 16px;
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.02);
}

.refresh {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, opacity 0.2s ease;
}

.refresh:hover    { background: rgba(56, 189, 248, 0.22); }
.refresh:active   { transform: scale(0.96); }
.refresh:disabled { opacity: 0.5; cursor: progress; }

.refresh svg {
  transition: transform 0.6s ease;
}
.refresh.is-spinning svg {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Light mode ---------- */
@media (prefers-color-scheme: light) {
  :root {
    --bg-0: #eaf4fb;
    --bg-1: #d7ecf8;
    --card: rgba(255, 255, 255, 0.7);
    --card-border: rgba(15, 70, 110, 0.10);
    --text: #0c2a40;
    --text-dim: #5b7d97;
    --accent: #0284c7;
    --accent-soft: rgba(2, 132, 199, 0.12);
    --shadow: 0 30px 70px -25px rgba(20, 80, 120, 0.4);
  }
  body {
    background:
      radial-gradient(1000px 500px at 75% -10%, #bfe3f5 0%, transparent 55%),
      radial-gradient(800px 460px at 5% 110%, #cdeef2 0%, transparent 50%),
      linear-gradient(160deg, var(--bg-0), var(--bg-1));
  }
  .temp {
    background: linear-gradient(180deg, #0c2a40, #0284c7);
    -webkit-background-clip: text;
    background-clip: text;
  }
}

@media (prefers-reduced-motion: reduce) {
  .wave, .badge__dot, .refresh svg { animation: none !important; }
}