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

:root {
  --teal-900: #042f2e;
  --teal-800: #134e4a;
  --teal-700: #115e59;
  --teal-600: #0d9488;
  --teal-500: #14b8a6;
  --teal-400: #2dd4bf;
  --teal-100: #ccfbf1;
  --teal-50:  #f0fdfa;
  --sky-400:  #38bdf8;
  --coral:    #fb7185;
  --sand:     #fde68a;
  --dark:     #0f172a;
  --gray-600: #475569;
  --gray-400: #94a3b8;
  --gray-100: #f1f5f9;
  --white:    #ffffff;
  --radius:   1rem;
  --radius-sm: 0.5rem;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--teal-50);
  color: var(--dark);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Header ────────────────────────────────── */

.header {
  background: var(--teal-800);
  color: var(--white);
  padding: 0.875rem 1rem;
}

.header-inner {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand-icon {
  font-size: 1.1rem;
}

.header-subtitle {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--teal-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── City Nav ───────────────────────────────── */

.city-nav {
  background: var(--teal-700);
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.city-nav::-webkit-scrollbar { display: none; }

.city-btn {
  flex: none;
  padding: 0.6rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--teal-100);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.city-btn:hover {
  color: var(--white);
}

.city-btn.active {
  color: var(--white);
  border-bottom-color: var(--teal-400);
}

/* ── Main ───────────────────────────────────── */

main {
  flex: 1;
  padding: 1rem;
  max-width: 480px;
  width: 100%;
  margin: 0 auto;
}

/* ── Loading ────────────────────────────────── */

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 3rem 1rem;
  color: var(--gray-600);
  font-size: 0.875rem;
}

.loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--teal-100);
  border-top-color: var(--teal-600);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ── Error ──────────────────────────────────── */

.error-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 3rem 1rem;
  text-align: center;
}

.error-icon { font-size: 2.5rem; }

.retry-btn {
  padding: 0.5rem 1.25rem;
  background: var(--teal-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.retry-btn:hover { background: var(--teal-700); }

/* ── Hidden ─────────────────────────────────── */

.hidden { display: none !important; }

/* ── Scene Card ─────────────────────────────── */

.scene {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  max-height: 420px;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--teal-700) 0%, var(--teal-800) 100%);
  transition: background 0.5s;
}

.scene[data-code="0"],
.scene[data-code="1"]  { background: linear-gradient(135deg, #0369a1 0%, #0ea5e9 100%); }
.scene[data-code="2"]  { background: linear-gradient(135deg, #0d9488 0%, #38bdf8 100%); }
.scene[data-code="3"]  { background: linear-gradient(135deg, #475569 0%, #64748b 100%); }
.scene[data-code="45"],
.scene[data-code="48"] { background: linear-gradient(135deg, #64748b 0%, #94a3b8 100%); }
.scene[data-code="rain"]  { background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%); }
.scene[data-code="storm"] { background: linear-gradient(135deg, #4c1d95 0%, #1e1b4b 100%); }

.scene-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius);
  transition: opacity 0.4s;
}

.scene-top-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1.25rem 3.5rem;
  background: linear-gradient(to bottom,
    rgba(0,0,0,0.72) 0%,
    rgba(0,0,0,0.50) 45%,
    rgba(0,0,0,0.10) 75%,
    transparent 100%);
  z-index: 2;
}

.city-name {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
  margin-bottom: 0.4rem;
}

.scene-icon {
  font-size: 4.5rem;
  line-height: 1;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,0.5));
  transition: transform 0.3s;
  user-select: none;
  margin-bottom: 0.4rem;
}

.scene-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255,255,255,0.92);
  text-shadow: 0 1px 6px rgba(0,0,0,0.6);
  margin-bottom: 0.2rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.scene-temp-display {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  text-shadow: 0 2px 10px rgba(0,0,0,0.6);
  letter-spacing: -0.02em;
}

/* ── Current Conditions ─────────────────────── */

.current {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.temp-block {
  display: flex;
  align-items: flex-start;
  gap: 0.15rem;
  line-height: 1;
}

.temp {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--teal-800);
  letter-spacing: -0.04em;
}

.temp-unit {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-400);
  padding-top: 0.6rem;
}

.meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-top: 0.25rem;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--gray-600);
}

.meta-row span:last-child {
  font-weight: 600;
  color: var(--dark);
}

/* ── AI Scene Prompt Card ───────────────────── */

.scene-prompt-card {
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  margin-bottom: 1rem;
}

.scene-prompt-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--teal-700);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.scene-prompt {
  font-size: 0.8125rem;
  color: var(--gray-600);
  line-height: 1.55;
}

/* ── 7-Day Forecast ─────────────────────────── */

.forecast {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.forecast-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.forecast-strip {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.forecast-day {
  display: grid;
  grid-template-columns: 3.5rem 2rem 1fr auto auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.875rem;
}

.forecast-day:last-child { border-bottom: none; }

.forecast-day-name {
  font-weight: 600;
  color: var(--dark);
}

.forecast-emoji {
  font-size: 1.1rem;
  text-align: center;
}

.forecast-label {
  color: var(--gray-600);
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.forecast-high {
  font-weight: 700;
  color: var(--dark);
  text-align: right;
}

.forecast-low {
  color: var(--gray-400);
  text-align: right;
  min-width: 2.5rem;
}

/* ── Updated ────────────────────────────────── */

.updated {
  font-size: 0.75rem;
  color: var(--gray-400);
  text-align: center;
  padding-bottom: 0.5rem;
}

/* ── Footer ─────────────────────────────────── */

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.75rem;
  color: var(--gray-400);
}

footer a {
  color: var(--teal-600);
  text-decoration: none;
}

footer a:hover { text-decoration: underline; }

/* ── Dark mode ──────────────────────────────── */

@media (prefers-color-scheme: dark) {
  body { background: var(--teal-900); color: var(--white); }
  .current, .forecast { background: var(--teal-800); box-shadow: none; }
  .scene-prompt-card { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1); }
  .scene-prompt-label { color: var(--teal-400); }
  .scene-prompt { color: rgba(255,255,255,0.7); }
  .forecast-day { border-bottom-color: rgba(255,255,255,0.08); }
  .forecast-day-name { color: var(--white); }
  .meta-row span:last-child { color: var(--white); }
  .temp { color: var(--teal-400); }
  .forecast-high { color: var(--white); }
  footer { color: rgba(255,255,255,0.4); }
}