* {
  box-sizing: border-box;
}

:root {
  --bg: #040812;
  --bg-accent: #0b162b;
  --text: #e7edf7;
  --muted: #8ea6c4;
  --accent: #5fd4ff;
  --accent-2: #7c5bff;
  --card: rgba(9, 20, 40, 0.8);
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 20px 80px rgba(0, 0, 0, 0.45);
  font-family: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 20% 20%, rgba(124, 91, 255, 0.22), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(95, 212, 255, 0.18), transparent 35%),
    radial-gradient(circle at 50% 80%, rgba(255, 255, 255, 0.05), transparent 35%),
    var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 24px;
}

.app-shell {
  position: relative;
  width: min(520px, 100%);
  isolation: isolate;
}

.glow {
  position: absolute;
  inset: -80px;
  background: radial-gradient(circle at 50% 50%, rgba(95, 212, 255, 0.14), transparent 50%);
  filter: blur(32px);
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  border-radius: 28px;
  padding: 32px 28px;
  background: linear-gradient(145deg, rgba(12, 20, 40, 0.9), rgba(8, 14, 28, 0.92));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.label {
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
}

.status {
  padding: 6px 12px;
  border-radius: 99px;
  background: rgba(95, 212, 255, 0.08);
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
}

.temp {
  font-size: clamp(72px, 18vw, 112px);
  font-weight: 700;
  line-height: 1;
  margin: 12px 0 8px;
  text-align: center;
  letter-spacing: -0.04em;
}

.timestamp {
  margin: 0 0 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

#refreshBtn {
  border: none;
  border-radius: 16px;
  padding: 12px 18px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0b0f1b;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(124, 91, 255, 0.35);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

#refreshBtn:active {
  transform: translateY(2px);
  box-shadow: 0 4px 18px rgba(124, 91, 255, 0.25);
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.error {
  min-height: 20px;
  margin: 12px 0 0;
  color: #ffb4a2;
  font-size: 14px;
}

@media (max-width: 480px) {
  body {
    padding: 12px;
  }
  .card {
    padding: 28px 22px;
    border-radius: 22px;
  }
  .actions {
    flex-direction: column;
    align-items: stretch;
  }
  #refreshBtn {
    width: 100%;
    text-align: center;
  }
  .hint {
    text-align: center;
  }
}