:root {
  --page: #74d84a;
  --page-soft: #8ee35f;
  --ink: #060806;
  --muted: #2c3a27;
  --muted-2: #5a6b54;
  --surface: #f4fbef;
  --surface-2: rgba(255, 255, 255, 0.72);
  --surface-3: rgba(255, 255, 255, 0.52);
  --line: rgba(0, 0, 0, 0.12);
  --line-strong: rgba(0, 0, 0, 0.18);
  --shadow: 0 20px 50px rgba(15, 48, 8, 0.16);
  --shadow-soft: 0 10px 26px rgba(15, 48, 8, 0.10);
  --radius-lg: 30px;
  --radius-md: 22px;
  --radius-sm: 16px;
  --black: #050505;
  --white: #ffffff;
  --ok: #0f8f45;
  --good: #5ab930;
  --moderate: #d7951d;
  --poor: #d16525;
  --very-poor: #b63333;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --page: #101c12;
  --page-soft: #152817;
  --ink: #f4f8f1;
  --muted: #c7d6bf;
  --muted-2: #98a992;
  --surface: #1a281b;
  --surface-2: rgba(30, 44, 30, 0.88);
  --surface-3: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.16);
  --shadow: 0 22px 55px rgba(0, 0, 0, 0.34);
  --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.24);
  --black: #050505;
  --white: #f7fff1;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% -8%, rgba(255, 255, 255, 0.22), transparent 30%),
    linear-gradient(135deg, var(--page), var(--page-soft));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

button,
a {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  left: 18px;
  top: 14px;
  z-index: 100;
  transform: translateY(-150%);
  background: var(--black);
  color: #fff;
  padding: 10px 14px;
  border-radius: 999px;
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 30px;
}

.site-header,
.hero,
.panel,
.chart-card,
.summary-card,
.message-bar {
  border: 1px solid var(--line);
  background: var(--surface-2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 70px;
  padding: 12px 14px;
  border-radius: 999px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  color: #fff;
  background: var(--black);
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.12);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-status,
.theme-toggle,
.campaign-pills span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  font-weight: 850;
  white-space: nowrap;
}

.live-status {
  color: #fff;
  background: var(--black);
  font-size: 0.88rem;
}

.theme-toggle {
  cursor: pointer;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
  transition: transform 160ms ease, background 160ms ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  background: var(--surface-3);
}

.dashboard {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.75fr);
  gap: 20px;
  align-items: stretch;
  padding: clamp(20px, 4vw, 42px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.kicker {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1,
.panel h2,
.section-title h2 {
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.055em;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  line-height: 0.9;
}

.hero-text {
  max-width: 650px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.55;
}

.campaign-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.campaign-pills span {
  min-width: 140px;
  color: #fff;
  background: var(--black);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.78);
}

.now-card {
  display: grid;
  gap: 22px;
  min-height: 100%;
  padding: 22px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  border-radius: calc(var(--radius-lg) - 8px);
}

.now-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.weather-symbol {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  flex: 0 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  font-size: 2.2rem;
}

.city {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  color: var(--muted-2);
  font-size: 0.9rem;
  font-weight: 800;
}

.now-top strong {
  display: block;
  font-size: 1.3rem;
  line-height: 1.15;
}

.temp-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.temp-row > strong {
  font-size: clamp(3.6rem, 9vw, 6.2rem);
  line-height: 0.86;
  letter-spacing: -0.08em;
}

.temp-row span {
  color: var(--muted);
  font-weight: 800;
  text-align: right;
}

.now-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.now-meta div {
  padding: 12px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.now-meta span,
.summary-card span,
.data-list span,
.pollutants span {
  display: block;
  color: var(--muted-2);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.015em;
}

.now-meta strong {
  display: block;
  margin-top: 4px;
  font-size: 0.92rem;
}

.message-bar {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
}

.message-bar i {
  margin-top: 4px;
  color: var(--poor);
}

.message-bar p {
  margin: 4px 0 0;
  color: var(--muted);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.summary-card {
  display: grid;
  align-content: space-between;
  gap: 12px;
  min-height: 156px;
  padding: 18px;
  border-radius: var(--radius-md);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.summary-card:hover,
.chart-card:hover,
.panel:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.summary-card i {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--black);
  border-radius: 14px;
}

.summary-card strong {
  display: block;
  font-size: clamp(1.25rem, 2.5vw, 1.9rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.summary-card small {
  color: var(--muted);
  font-weight: 800;
}

.summary-card.primary {
  background: var(--black);
  color: #fff;
}

.summary-card.primary span,
.summary-card.primary small {
  color: rgba(255, 255, 255, 0.72);
}

.summary-card.primary i {
  color: var(--black);
  background: #fff;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
  grid-template-areas:
    "weather air"
    "advice advice";
  gap: 18px;
}

.data-panel { grid-area: weather; }
.air-panel { grid-area: air; }
.advice-panel { grid-area: advice; }

.panel {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius-lg);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.panel-heading,
.section-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.panel h2,
.section-title h2 {
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  line-height: 0.98;
}

.panel-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  color: #fff;
  background: var(--black);
  border-radius: 16px;
}

.data-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.data-list div,
.pollutants div {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--surface-3);
  border-radius: 18px;
}

.data-list span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.data-list strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.aqi-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  color: #fff;
  background: #777;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 950;
  white-space: nowrap;
}

.aqi-badge[data-status="excellent"] { background: var(--ok); }
.aqi-badge[data-status="good"] { background: var(--good); color: #071006; }
.aqi-badge[data-status="moderate"] { background: var(--moderate); color: #130c02; }
.aqi-badge[data-status="poor"] { background: var(--poor); }
.aqi-badge[data-status="very-poor"] { background: var(--very-poor); }
.aqi-badge[data-status="loading"] { background: var(--black); }

.air-description,
.advice-summary {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.55;
  font-weight: 650;
}

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

.pollutants strong {
  display: inline-block;
  margin-top: 8px;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.04em;
}

.pollutants small {
  margin-left: 4px;
  color: var(--muted-2);
  font-weight: 750;
}

.advice-panel {
  background: var(--surface);
}

.advice-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.advice-item {
  display: grid;
  gap: 12px;
  align-content: start;
  min-height: 152px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  border-radius: 20px;
}

.advice-item i {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: #fff;
  background: var(--black);
  border-radius: 14px;
}

.advice-item strong {
  display: block;
  font-size: 1rem;
  line-height: 1.2;
}

.advice-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.43;
  font-weight: 620;
}

.charts {
  display: grid;
  gap: 14px;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.chart-card {
  padding: 18px;
  border-radius: var(--radius-md);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.chart-card.wide {
  grid-column: span 2;
}

.chart-card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.chart-area {
  position: relative;
  height: 210px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 22px;
  padding: 0 12px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9rem;
  font-weight: 760;
}

:root[data-theme="dark"] .site-footer {
  color: var(--muted-2);
}

[data-value] {
  transition: opacity 180ms ease, transform 180ms ease;
}

.value-fade {
  animation: valueFade 420ms ease both;
}

@keyframes valueFade {
  0% { opacity: 0.24; transform: translateY(4px); }
  100% { opacity: 1; transform: translateY(0); }
}

body.is-loading [data-value] {
  color: transparent !important;
  border-radius: 9px;
  background: linear-gradient(90deg, rgba(255,255,255,0.20), rgba(255,255,255,0.55), rgba(255,255,255,0.20));
  background-size: 220% 100%;
  animation: skeleton 1.2s ease-in-out infinite;
}

:root[data-theme="dark"] body.is-loading [data-value] {
  background: linear-gradient(90deg, rgba(255,255,255,0.06), rgba(255,255,255,0.14), rgba(255,255,255,0.06));
  background-size: 220% 100%;
}

@keyframes skeleton {
  0% { background-position: 120% 0; }
  100% { background-position: -120% 0; }
}

@media (max-width: 1080px) {
  .summary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .content-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "weather"
      "air"
      "advice";
  }

  .chart-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .advice-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .page-shell {
    width: min(100% - 26px, 1180px);
    padding-top: 14px;
  }

  .site-header {
    position: relative;
    top: auto;
    align-items: stretch;
    border-radius: 26px;
  }

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

  .hero h1 {
    font-size: clamp(2.45rem, 12vw, 4.3rem);
  }

  .now-card {
    padding: 18px;
  }

  .data-list,
  .pollutants {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body {
    background: var(--page);
  }

  .page-shell {
    width: min(100% - 20px, 1180px);
    padding-bottom: 20px;
  }

  .site-header {
    flex-direction: column;
    padding: 12px;
    gap: 12px;
  }

  .brand,
  .header-actions,
  .live-status,
  .theme-toggle {
    width: 100%;
  }

  .header-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .live-status,
  .theme-toggle {
    min-height: 42px;
    padding: 0 10px;
    font-size: 0.84rem;
  }

  .hero,
  .panel {
    border-radius: 24px;
  }

  .hero {
    padding: 18px;
  }

  .hero-text {
    margin-top: 14px;
  }

  .campaign-pills {
    display: grid;
    grid-template-columns: 1fr;
    margin-top: 20px;
  }

  .campaign-pills span {
    min-width: 0;
  }

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

  .temp-row span {
    text-align: left;
  }

  .now-meta,
  .summary-grid,
  .data-list,
  .pollutants,
  .advice-list,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .summary-card {
    min-height: 118px;
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .summary-card span,
  .summary-card small {
    grid-column: 2;
  }

  .summary-card strong {
    grid-column: 2;
  }

  .chart-card.wide {
    grid-column: auto;
  }

  .chart-area {
    height: 230px;
  }

  .site-footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: rgba(0, 0, 0, 0.62);
  }
}

@media (max-width: 420px) {
  .page-shell {
    width: min(100% - 14px, 1180px);
  }

  .hero h1 {
    font-size: 2.35rem;
  }

  .panel-heading,
  .section-title {
    align-items: stretch;
    flex-direction: column;
  }

  .weather-symbol {
    width: 58px;
    height: 58px;
    border-radius: 18px;
    font-size: 1.75rem;
  }

  .now-top strong {
    font-size: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}