/* ===========================
   cocoair — style.css
   =========================== */

:root {
  --bg: #0f1117;
  --bg2: #161b27;
  --bg3: #1e2435;
  --border: rgba(255,255,255,0.08);
  --text: #e8eaf0;
  --text2: #8b91a7;
  --text3: #555d75;
  --accent: #4fc3f7;
  --accent2: #81d4fa;
  --good: #66bb6a;
  --moderate: #ffca28;
  --unhealthy-s: #ffa726;
  --unhealthy: #ef5350;
  --very-unhealthy: #ab47bc;
  --hazardous: #b71c1c;
  --card-radius: 14px;
  --font: 'Noto Sans JP', sans-serif;
}

body.light {
  --bg: #f0f4f8;
  --bg2: #ffffff;
  --bg3: #e8eef5;
  --border: rgba(0,0,0,0.08);
  --text: #1a1f2e;
  --text2: #5a6278;
  --text3: #9aa0b4;
  --accent: #0288d1;
  --accent2: #0277bd;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== HEADER ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  flex-shrink: 0;
}

.logo span {
  color: var(--text);
}

nav {
  display: flex;
  gap: 4px;
  flex: 1;
}

nav a {
  font-size: 0.8rem;
  color: var(--text2);
  padding: 6px 10px;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

nav a:hover {
  background: var(--bg3);
  color: var(--text);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-icon {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
  white-space: nowrap;
}

.btn-icon:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== SEARCH BAR ===== */
.search-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 20px 0;
  display: flex;
  gap: 8px;
}

.search-wrap input {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text);
  font-family: var(--font);
  transition: border-color 0.2s;
  outline: none;
}

.search-wrap input::placeholder {
  color: var(--text3);
}

.search-wrap input:focus {
  border-color: var(--accent);
}

.search-wrap button {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text2);
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.2s;
  white-space: nowrap;
}

.search-wrap button:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px 0;
  font-size: 0.78rem;
  color: var(--text3);
}

.breadcrumb a {
  color: var(--text3);
}

.breadcrumb a:hover {
  color: var(--accent);
}

/* ===== MAIN CONTAINER ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ===== PAGE TITLE ===== */
.page-title {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.page-subtitle {
  font-size: 0.85rem;
  color: var(--text2);
  margin-bottom: 24px;
}

/* ===== AQI HERO CARD ===== */
.aqi-hero {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 28px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.aqi-circle {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.aqi-circle-inner {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 3px solid currentColor;
}

.aqi-num {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.aqi-label-small {
  font-size: 0.65rem;
  opacity: 0.7;
  margin-top: 2px;
}

.aqi-info {
  flex: 1;
  min-width: 200px;
}

.aqi-status {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.aqi-description {
  font-size: 0.85rem;
  color: var(--text2);
  line-height: 1.6;
}

.aqi-updated {
  font-size: 0.75rem;
  color: var(--text3);
  margin-top: 8px;
}

/* AQI Color Classes */
.aqi-good       { color: var(--good);          border-color: var(--good) !important; }
.aqi-moderate   { color: var(--moderate);       border-color: var(--moderate) !important; }
.aqi-usg        { color: var(--unhealthy-s);    border-color: var(--unhealthy-s) !important; }
.aqi-unhealthy  { color: var(--unhealthy);      border-color: var(--unhealthy) !important; }
.aqi-very       { color: var(--very-unhealthy); border-color: var(--very-unhealthy) !important; }
.aqi-hazardous  { color: var(--hazardous);      border-color: var(--hazardous) !important; }

/* ===== POLLUTANT GRID ===== */
.pollutant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.pollutant-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pollutant-name {
  font-size: 0.75rem;
  color: var(--text2);
  font-weight: 500;
}

.pollutant-value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.pollutant-unit {
  font-size: 0.7rem;
  color: var(--text3);
}

.pollutant-bar-wrap {
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
}

.pollutant-bar {
  height: 100%;
  border-radius: 2px;
  transition: width 1s ease;
}

.pollutant-status {
  font-size: 0.72rem;
  font-weight: 600;
}

/* ===== HOURLY CHART ===== */
.section-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text2);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
}

.hourly-scroll {
  overflow-x: auto;
  margin-bottom: 20px;
  -webkit-overflow-scrolling: touch;
}

.hourly-scroll::-webkit-scrollbar {
  height: 4px;
}

.hourly-scroll::-webkit-scrollbar-track {
  background: var(--bg3);
  border-radius: 2px;
}

.hourly-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.hourly-table {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 16px;
  min-width: 700px;
}

.hourly-row {
  display: grid;
  grid-template-columns: 60px 80px 1fr 70px 70px;
  gap: 8px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.hourly-row:last-child {
  border-bottom: none;
}

.hourly-row.header {
  font-size: 0.72rem;
  color: var(--text3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 10px;
}

.hourly-time {
  color: var(--text2);
  font-weight: 600;
}

.hourly-aqi-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
}

.hourly-bar-cell {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hourly-mini-bar {
  flex: 1;
  height: 6px;
  background: var(--bg3);
  border-radius: 3px;
  overflow: hidden;
}

.hourly-mini-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s ease;
}

/* ===== CITY GRID (index) ===== */
.region-section {
  margin-bottom: 32px;
}

.region-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}

.city-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.2s;
  cursor: pointer;
}

.city-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.city-name {
  font-size: 0.9rem;
  font-weight: 700;
}

.city-pref {
  font-size: 0.7rem;
  color: var(--text3);
}

.city-aqi-mini {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.city-status-mini {
  font-size: 0.68rem;
  font-weight: 600;
}

.city-loading {
  font-size: 0.72rem;
  color: var(--text3);
}

/* ===== INFO SECTION ===== */
.info-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 22px;
  margin-bottom: 16px;
}

.info-card h2 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.info-card p {
  font-size: 0.84rem;
  color: var(--text2);
  line-height: 1.7;
}

/* AQI scale table */
.aqi-scale {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 10px;
}

.aqi-scale th {
  text-align: left;
  color: var(--text3);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

.aqi-scale td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.aqi-scale tr:last-child td {
  border-bottom: none;
}

.scale-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

/* ===== MAP ===== */
.map-embed {
  width: 100%;
  height: 300px;
  border-radius: var(--card-radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.map-embed iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== LOADING ===== */
.loading-text {
  color: var(--text3);
  font-size: 0.85rem;
  padding: 20px 0;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.loading-text {
  animation: pulse 1.4s ease-in-out infinite;
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 28px 20px;
  margin-top: 40px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
}

.footer-logo span {
  color: var(--text);
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--text3);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text3);
  width: 100%;
  margin-top: 8px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .aqi-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
  }

  .page-title {
    font-size: 1.3rem;
  }

  .pollutant-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hourly-row {
    grid-template-columns: 55px 70px 1fr 60px;
  }

  .city-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}