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

html { height: 100%; }

body {
  margin: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.45;
  color: var(--fg);
  background: var(--sky, #79b8f3);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: color .6s ease;
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

button, input { font-family: inherit; }

a { color: inherit; }

.app {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 16px 44px;
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0 14px;
}

.search {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  height: 48px;
  padding: 0 16px;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 10px 30px rgba(10, 30, 55, .10);
  backdrop-filter: blur(18px) saturate(1.35);
  -webkit-backdrop-filter: blur(18px) saturate(1.35);
  transition: background-color .4s ease, border-color .4s ease;
}

.search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 10px 30px rgba(10, 30, 55, .10), 0 0 0 3px var(--accent-soft);
}

.search-ico {
  width: 18px;
  height: 18px;
  flex: none;
  color: var(--muted);
}

.search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--fg);
  font-size: 15px;
}

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

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  display: none;
  max-height: 336px;
  overflow-y: auto;
  padding: 6px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--card-border);
  box-shadow: 0 22px 50px rgba(8, 22, 40, .22);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.search-results.open { display: block; }

.search-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 11px 14px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: var(--fg);
  font-size: 14px;
  text-align: left;
  cursor: pointer;
}

.search-item:hover,
.search-item.active { background: var(--item-hover); }

.search-item b { font-weight: 600; }

.search-item span {
  max-width: 48%;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-empty {
  padding: 13px 14px;
  color: var(--muted);
  font-size: 13.5px;
}

.icon-btn {
  width: 48px;
  height: 48px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--fg);
  cursor: pointer;
  backdrop-filter: blur(18px) saturate(1.35);
  -webkit-backdrop-filter: blur(18px) saturate(1.35);
  transition: background-color .2s ease, transform .15s ease;
}

.icon-btn:hover { background: var(--card-hover); }
.icon-btn:active { transform: scale(.94); }

.icon-btn svg { width: 20px; height: 20px; }

.icon-btn.spin svg { animation: spin 1s linear infinite; }

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

/* ---------- layout ---------- */

.main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.col {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.card {
  position: relative;
  padding: 22px;
  border-radius: 26px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 22px 60px rgba(10, 30, 55, .13);
  backdrop-filter: blur(22px) saturate(1.35);
  -webkit-backdrop-filter: blur(22px) saturate(1.35);
  transition: background-color .5s ease, border-color .5s ease;
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .card, .search, .icon-btn, .search-results { background: var(--panel); }
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: .3px;
}

.card-head span {
  color: var(--muted);
  font-size: 12px;
}

/* ---------- hero ---------- */

.hero { padding: 26px; }

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

.city {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .5px;
  line-height: 1.2;
  word-break: break-word;
}

.updated {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12.5px;
}

.hero-temp {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 16px 0 20px;
}

.temp {
  font-size: clamp(64px, 17vw, 104px);
  font-weight: 250;
  line-height: .92;
  letter-spacing: -3px;
  font-variant-numeric: tabular-nums;
}

.temp .deg {
  display: inline-block;
  margin-left: 2px;
  font-size: .44em;
  font-weight: 300;
  letter-spacing: 0;
  vertical-align: top;
  transform: translateY(.18em);
}

.cond {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 96px;
}

.cond svg {
  width: 84px;
  height: 84px;
  filter: drop-shadow(0 8px 20px rgba(8, 30, 50, .18));
}

.cond span {
  font-size: 15.5px;
  font-weight: 600;
  text-align: center;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.metrics li {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding: 11px 12px;
  border-radius: 14px;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  color: var(--muted);
  font-size: 12.5px;
}

.metrics svg {
  width: 17px;
  height: 17px;
  flex: none;
  color: var(--accent);
}

.metrics strong {
  margin-left: auto;
  color: var(--fg);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.sun-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--divider);
  color: var(--muted);
  font-size: 13px;
}

.sun-row span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sun-row svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

/* ---------- aqi ---------- */

.aqi-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.aqi-value {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  flex: none;
  border-radius: 20px;
  background: var(--aqi-color, #3fbf7f);
  color: #fff;
  font-size: 29px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 10px 24px rgba(6, 22, 40, .18);
}

.aqi-level {
  margin: 0 0 3px;
  font-size: 17px;
  font-weight: 650;
}

.aqi-advice {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  color: var(--muted);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

.chip b {
  margin-left: 4px;
  color: var(--fg);
  font-weight: 600;
}

.aqi-empty {
  margin: 4px 0 2px;
  color: var(--muted);
  font-size: 13.5px;
}

/* ---------- hourly ---------- */

.hourly-list {
  display: flex;
  gap: 8px;
  padding: 2px 2px 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--scroll) transparent;
  -webkit-overflow-scrolling: touch;
}

.hourly-list::-webkit-scrollbar { height: 6px; }
.hourly-list::-webkit-scrollbar-track { background: transparent; }
.hourly-list::-webkit-scrollbar-thumb { background: var(--scroll); border-radius: 3px; }

.hour-item {
  flex: 0 0 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 5px;
  border-radius: 16px;
  border: 1px solid transparent;
  background: var(--chip-bg);
  scroll-snap-align: start;
}

.hour-item.now {
  background: var(--accent-soft);
  border-color: var(--accent-border);
}

.h-time {
  color: var(--muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.hour-item.now .h-time {
  color: var(--accent);
  font-weight: 600;
}

.hour-item svg {
  width: 24px;
  height: 24px;
}

.h-temp {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.h-pop {
  min-height: 14px;
  color: var(--accent);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.empty-note {
  margin: 0;
  padding: 10px 2px 2px;
  color: var(--muted);
  font-size: 13.5px;
}

/* ---------- daily ---------- */

.daily-list {
  display: flex;
  flex-direction: column;
}

.daily-row {
  display: grid;
  grid-template-columns: minmax(70px, 92px) 34px 46px minmax(120px, 1fr);
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--divider);
}

.daily-row:first-child { border-top: 0; }

.d-day {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.d-day span {
  font-size: 14px;
  font-weight: 600;
}

.d-day em {
  color: var(--muted);
  font-size: 11.5px;
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.d-icon svg {
  display: block;
  width: 26px;
  height: 26px;
}

.d-pop {
  color: var(--accent);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.d-range {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.d-min,
.d-max {
  min-width: 28px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.d-max {
  color: var(--fg);
  font-weight: 600;
}

.bar {
  position: relative;
  flex: 1;
  min-width: 40px;
  height: 6px;
  border-radius: 3px;
  background: var(--divider);
}

.bar i {
  position: absolute;
  top: 0;
  bottom: 0;
  border-radius: 3px;
  background: linear-gradient(90deg, #59b7f5, #f6c445, #f0854a);
}

/* ---------- states ---------- */

.error-state {
  padding: 20px 4px 8px;
  text-align: center;
}

.error-state p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

.btn {
  padding: 10px 24px;
  border-radius: 12px;
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  color: var(--fg);
  font-size: 14px;
  cursor: pointer;
}

.btn:hover { background: var(--item-hover); }

.sk {
  display: block;
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  background: var(--sk-base);
}

.sk::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .3), transparent);
  animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

.sk-line { height: 13px; margin-bottom: 10px; }
.sk-line.w30 { width: 30%; }
.sk-line.w45 { width: 45%; }
.sk-line.w70 { width: 70%; }
.sk-temp { width: 58%; height: 84px; margin: 18px 0 20px; border-radius: 16px; }
.sk-chip { height: 42px; border-radius: 12px; }

.sk-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.sk-hours {
  display: flex;
  gap: 8px;
  overflow: hidden;
}

.sk-hour {
  flex: 0 0 64px;
  height: 108px;
  border-radius: 16px;
}

.sk-days {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sk-day { height: 38px; border-radius: 10px; }

/* ---------- footer / overlays ---------- */

.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 18px;
  margin-top: 22px;
  padding: 0 4px;
  color: var(--muted);
  font-size: 12px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 50;
  max-width: calc(100vw - 40px);
  padding: 11px 18px;
  border-radius: 12px;
  background: rgba(14, 26, 42, .92);
  color: #fff;
  font-size: 13.5px;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 14px);
  transition: opacity .25s ease, transform .25s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity .3s ease;
}

.progress.on {
  opacity: 1;
  animation: progress 1.6s ease-in-out infinite;
}

@keyframes progress {
  0% { width: 6%; }
  55% { width: 68%; }
  100% { width: 92%; }
}

.noscript {
  position: fixed;
  left: 50%;
  top: 22px;
  z-index: 99;
  transform: translateX(-50%);
  padding: 12px 18px;
  border-radius: 12px;
  background: rgba(14, 26, 42, .92);
  color: #fff;
  font-size: 14px;
}

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  .app { padding: 6px 12px 36px; }
  .card { padding: 18px; border-radius: 22px; }
  .hero { padding: 22px 18px; }
  .city { font-size: 26px; }
  .cond svg { width: 72px; height: 72px; }
  .metrics { gap: 8px; }
  .metrics li { padding: 10px; }
  .metrics strong { font-size: 12.5px; }
  .daily-row { gap: 8px; }
}

@media (max-width: 420px) {
  .daily-row { grid-template-columns: minmax(60px, 76px) 30px minmax(110px, 1fr); }
  .d-pop { display: none; }
  .d-min, .d-max { min-width: 25px; font-size: 12.5px; }
  .d-range { gap: 6px; }
  .metrics li { font-size: 12px; }
  .metrics strong { font-size: 12px; }
}

@media (min-width: 900px) {
  .app {
    max-width: 1040px;
    padding: 14px 24px 52px;
  }

  .main {
    display: grid;
    grid-template-columns: minmax(0, .98fr) minmax(0, 1.12fr);
    align-items: start;
    gap: 18px;
  }

  .col { gap: 18px; }

  .col-left {
    position: sticky;
    top: 92px;
  }

  .topbar { padding: 14px 0 18px; }

  .hourly-list {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 8px;
    padding: 2px;
    overflow: visible;
  }

  .hour-item { flex: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .fx { display: none; }
  .sk::after { display: none; }
}