:root {
  --bg-1: #f3f7ff;
  --bg-2: #dbe9ff;
  --bg-3: #c7ddff;
  --line: rgba(255, 255, 255, 0.7);
  --line-soft: rgba(255, 255, 255, 0.5);
  --text-soft: rgba(22, 34, 64, 0.58);
  --text-main: #162240;
  --tabbar-h: 72px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(145deg, var(--bg-1) 0%, var(--bg-2) 52%, var(--bg-3) 100%);
  color: var(--text-main);
  position: relative;
  overflow-x: hidden;
}

.bg-orb {
  position: fixed;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  z-index: -1;
}

.orb-1 { background: #6fb7ff; top: -120px; left: -90px; }
.orb-2 { background: #85f0ff; right: -120px; top: 180px; }
.orb-3 { background: #6f88ff; left: 35%; bottom: -180px; }

.app-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px;
}

.glass {
  position: relative;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.58));
  border: 1px solid var(--line);
  box-shadow: 0 10px 35px rgba(78, 122, 214, 0.18);
  backdrop-filter: blur(22px) saturate(145%);
  border-radius: 22px;
  overflow: hidden;
}

.glass::before {
  content: "";
  position: absolute;
  inset: -60%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0) 35%);
  pointer-events: none;
  transition: opacity .25s ease;
  opacity: .72;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  margin-bottom: 14px;
}

.brand h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 1px;
}

.brand p {
  margin: 2px 0 0;
  color: var(--text-soft);
  font-size: 13px;
}

.top-nav {
  display: flex;
  gap: 10px;
}

.top-nav a {
  color: var(--text-main);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 14px;
}

.top-nav a.is-active {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(255, 255, 255, 0.9);
}

.tab-shell {
  padding-bottom: calc(var(--tabbar-h) + 14px);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.layout-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 14px;
}

.card-main,
.card-side,
.card-full,
.card-half {
  padding: 16px;
}

.card-main { min-height: 380px; }
.card-side { min-height: 280px; }
.card-full { grid-column: 1 / -1; }

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.card-head h2 {
  margin: 0;
  font-size: 36px;
  letter-spacing: 0.5px;
}

.tiny {
  color: var(--text-soft);
  font-size: 13px;
  margin: 0;
}

.temp-line {
  font-size: 86px;
  line-height: 1.1;
  font-weight: 700;
  margin: 8px 0;
  color: #0f224a;
  text-shadow: 0 8px 18px rgba(140, 171, 230, 0.3);
}

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

.weather-badge {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 600;
  min-width: 118px;
  text-align: center;
}

.desc {
  margin: 2px 0 0;
  line-height: 1.75;
  color: rgba(22, 34, 64, 0.82);
}

.metrics {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.64);
  padding: 10px;
}

.metric-label {
  display: block;
  font-size: 12px;
  color: var(--text-soft);
  margin-bottom: 4px;
}

.metric strong {
  font-size: 18px;
  font-weight: 700;
}

.update-line {
  margin-top: 10px;
}

.actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.11));
  border-radius: 999px;
  color: #18305e;
  padding: 8px 16px;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.28);
  box-shadow: 0 8px 20px rgba(24, 76, 195, 0.45);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.36);
}

.search-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.input {
  flex: 1;
  min-width: 200px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.33);
  background: rgba(255, 255, 255, 0.17);
  color: #102247;
  padding: 10px 12px;
}

.input:focus {
  outline: none;
  border-color: rgba(166, 219, 255, 0.95);
  box-shadow: 0 0 0 3px rgba(145, 214, 255, 0.2);
}

.input::placeholder {
  color: rgba(16, 34, 71, 0.44);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}

.chip {
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.1);
  color: #162b57;
  border-radius: 999px;
  padding: 6px 11px;
  cursor: pointer;
}

.search-results {
  display: grid;
  gap: 8px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.55);
  padding: 10px 12px;
  transition: transform .2s ease, border-color .2s ease;
}

.result-row:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.35);
}

.result-row p {
  margin: 2px 0 0;
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(125px, 1fr));
  gap: 10px;
}

.forecast-item {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.08));
  padding: 10px;
  text-align: center;
}

.forecast-item p {
  margin: 4px 0;
  font-size: 13px;
}

.tips {
  margin: 0;
  padding-left: 20px;
}

.tips-title {
  margin-top: 12px;
}

.tips li {
  margin: 7px 0;
  line-height: 1.7;
  color: rgba(22, 34, 64, 0.86);
}

.me-list {
  display: grid;
  gap: 10px;
}

.me-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 12px;
  padding: 12px;
}

.me-item span {
  color: var(--text-soft);
}

.about-link {
  margin-top: 12px;
  display: inline-block;
}

.tabbar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 14px;
  width: min(560px, calc(100vw - 20px));
  height: var(--tabbar-h);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  padding: 8px;
  z-index: 30;
}

.tab-btn {
  border: none;
  background: transparent;
  color: rgba(16, 34, 71, 0.58);
  font-size: 14px;
  font-weight: 600;
  height: 100%;
  border-radius: 14px;
  cursor: pointer;
}

.tab-btn.is-active {
  background: rgba(255, 255, 255, 0.78);
  color: #193161;
}

.layout-about {
  display: grid;
  gap: 14px;
}

.about-card {
  padding: 18px;
}

.about-card h2,
.about-card h3 {
  margin: 0 0 10px;
}

.about-card p {
  margin: 7px 0;
}

.footnote {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  color: var(--text-soft);
  font-size: 13px;
  padding-bottom: 8px;
}

@media (max-width: 880px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .temp-line {
    font-size: 64px;
  }

  .hero-line {
    align-items: flex-end;
  }

  .metrics {
    grid-template-columns: 1fr;
  }

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

  .tabbar {
    bottom: 8px;
    height: 66px;
    width: calc(100vw - 16px);
  }
}