@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=DM+Mono:wght@300;400;500&display=swap');

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

:root {
  --bg: #f0f4ff;
  --bg-card: #ffffff;
  --bg-input: #e8edf8;
  --text-primary: #0d1b3e;
  --text-secondary: #5a6a8a;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-glow: rgba(37, 99, 235, 0.25);
  --border: rgba(37, 99, 235, 0.15);
  --shadow: 0 20px 60px rgba(13, 27, 62, 0.12);
  --shadow-card: 0 8px 32px rgba(13, 27, 62, 0.08);
  --toggle-bg: #dce4f5;
  --error: #ef4444;
  --success: #10b981;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark {
  --bg: #07080f;
  --bg-card: #0f1322;
  --bg-input: #1a1f35;
  --text-primary: #e8eeff;
  --text-secondary: #7a88b0;
  --accent: #4f8cff;
  --accent-hover: #7aaeff;
  --accent-glow: rgba(79, 140, 255, 0.3);
  --border: rgba(79, 140, 255, 0.2);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --toggle-bg: #1a1f35;
  --error: #ff6b6b;
  --success: #34d399;
}

html {
  font-size: 16px;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  transition: background-color var(--transition), color var(--transition);
  position: relative;
  overflow-x: hidden;
}

/* Noise grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* Blobs */
body::after {
  content: '';
  position: fixed;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  top: -200px;
  right: -200px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  animation: blobMove 12s ease-in-out infinite alternate;
}

@keyframes blobMove {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-60px, 80px) scale(1.1); }
}

/* Theme toggle */
#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: 'DM Mono', monospace;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}

#theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Main container */
.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  text-align: center;
}

/* Header */
.header {
  margin-bottom: 40px;
  animation: fadeUp 0.6s ease both;
}

.header .icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
  filter: drop-shadow(0 4px 12px var(--accent-glow));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.header h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
}

.header h1 span {
  color: var(--accent);
}

.header p {
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 300;
}

/* Search card */
.search-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--shadow);
  animation: fadeUp 0.6s ease 0.1s both;
  transition: background-color var(--transition), border-color var(--transition);
}

.input-group {
  position: relative;
  margin-bottom: 16px;
}

.input-group .input-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
}

input[type="text"] {
  width: 100%;
  padding: 14px 16px 14px 44px;
  background: var(--bg-input);
  border: 2px solid transparent;
  border-radius: 14px;
  font-size: 1rem;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition);
}

input[type="text"]::placeholder {
  color: var(--text-secondary);
}

input[type="text"]:focus {
  border-color: var(--accent);
  background: var(--bg-card);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

button.btn-primary {
  width: 100%;
  padding: 14px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 20px var(--accent-glow);
}

button.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

button.btn-primary:active {
  transform: translateY(0);
}

/* Loading */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 0 20px;
  animation: fadeUp 0.4s ease both;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-family: 'DM Mono', monospace;
}

/* Result card */
.result-card {
  margin-top: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  animation: fadeUp 0.5s ease both;
  transition: background-color var(--transition), border-color var(--transition);
}

.result-card .city-name {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.result-card .timestamp {
  font-size: 0.78rem;
  font-family: 'DM Mono', monospace;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.temp-display {
  font-size: 5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.temp-display span {
  font-size: 2rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.stat-item {
  background: var(--bg-input);
  border-radius: 14px;
  padding: 14px 10px;
  text-align: center;
  transition: background-color var(--transition);
}

.stat-item .stat-icon {
  font-size: 1.4rem;
  display: block;
  margin-bottom: 6px;
}

.stat-item .stat-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  display: block;
}

.stat-item .stat-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-family: 'DM Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
  display: block;
}

/* Back button */
.btn-back {
  width: 100%;
  padding: 13px 20px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--border);
  border-radius: 14px;
  font-size: 0.95rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}

.btn-back:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-1px);
}

/* Error */
.error-msg {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 12px;
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.08);
  border-radius: 10px;
  border: 1px solid rgba(239, 68, 68, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Keyframes */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 500px) {
  .header h1 { font-size: 2.2rem; }
  .temp-display { font-size: 4rem; }
  .stats-grid { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .search-card, .result-card { padding: 24px 20px; }
}