:root {
  --accent: #1447E6;
  --accent-ink: #ffffff;
  --danger: #E63946;
  --good: #16A34A;
  --warn: #E6A317;
  --orange: #F97316;
  --purple: #9333EA;
  --maroon: #7F1D1D;

  --bg: #F6F7FB;
  --surface: #FFFFFF;
  --surface-2: #F1F3F9;
  --border: #E4E7F0;
  --ink-900: #12131A;
  --ink-700: #5B5E6D;
  --ink-500: #8A8DA0;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(18,19,26,0.04), 0 8px 24px rgba(18,19,26,0.06);
}

html[data-theme="dark"] {
  --bg: #0E0F14;
  --surface: #16171F;
  --surface-2: #1D1F29;
  --border: #2A2C38;
  --ink-900: #F3F4F8;
  --ink-700: #B7B9C8;
  --ink-500: #7B7E90;
  --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-900);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  transition: background .2s ease, color .2s ease;
}

h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; color: var(--ink-900); }
p { margin: 0; color: var(--ink-700); line-height: 1.55; }
small { color: var(--ink-500); }

.container { max-width: 900px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); text-decoration: none; }

/* ============= TOPBAR ============= */
.topbar { position: sticky; top: 0; z-index: 40; background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner { max-width: 900px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 600; font-size: 15px; color: var(--ink-900); }
.brand-mark { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.brand-mark svg { width: 20px; height: 20px; }
.brand small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 11.5px; margin-top: 1px; }
.nav-actions { display: flex; gap: 8px; align-items: center; }
.icon-btn { width: 38px; height: 38px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--ink-700); display: flex; align-items: center; justify-content: center; cursor: pointer; }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover { background: var(--surface-2); }
.unit-btn { border: 1px solid var(--border); background: var(--surface); color: var(--ink-900); font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; padding: 0 12px; height: 38px; border-radius: var(--radius-sm); cursor: pointer; }
.unit-btn:hover { background: var(--surface-2); }

/* ============= HERO / SEARCH ============= */
.hero { padding: 44px 0 28px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 16px; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--good); }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.01em; }
h1 em { font-style: normal; color: var(--accent); }

.search-wrap { position: relative; max-width: 620px; margin: 26px auto 0; text-align: left; }
.search-box { display: flex; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 8px 8px 8px 18px; box-shadow: var(--shadow); }
.search-icon { width: 18px; height: 18px; color: var(--ink-500); flex-shrink: 0; }
.search-box input { flex: 1; border: none; background: transparent; font-size: 15px; color: var(--ink-900); outline: none; font-family: var(--font-body); min-width: 0; }
.search-results { position: absolute; top: calc(100% + 8px); left: 0; right: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); box-shadow: var(--shadow); overflow: hidden; z-index: 30; display: none; max-height: 320px; overflow-y: auto; }
.search-results.open { display: block; }
.search-result-item { display: flex; align-items: center; gap: 10px; padding: 12px 16px; cursor: pointer; border-bottom: 1px solid var(--border); text-align: left; }
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--surface-2); }
.search-result-item b { font-family: var(--font-body); font-size: 14px; color: var(--ink-900); display: block; }
.search-result-item span { font-size: 12.5px; color: var(--ink-500); }
.search-empty { padding: 14px 16px; font-size: 13.5px; color: var(--ink-500); }

.popular-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px; align-items: center; }
.chip-label { font-size: 12.5px; color: var(--ink-500); font-weight: 600; margin-right: 2px; }
.chip { border: 1px solid var(--border); background: var(--surface); color: var(--ink-700); font-size: 13px; font-weight: 600; padding: 7px 14px; border-radius: 999px; cursor: pointer; }
.chip:hover, .chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.favorites-bar { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 12px; }
.fav-chip { display: flex; align-items: center; gap: 6px; border: 1px solid var(--border); background: var(--surface-2); color: var(--ink-900); font-size: 12.5px; font-weight: 600; padding: 6px 10px 6px 13px; border-radius: 999px; cursor: pointer; }
.fav-chip svg { width: 12px; height: 12px; color: var(--ink-500); }
.fav-chip:hover { border-color: var(--accent); }

.btn { display: inline-flex; align-items: center; gap: 7px; padding: 10px 16px; border-radius: 999px; font-family: var(--font-body); font-weight: 600; font-size: 13.5px; border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.btn svg { width: 15px; height: 15px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #0f38b8; }
.btn-sm { padding: 9px 14px; font-size: 13px; }

/* ============= CARD ============= */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }

/* ============= DASHBOARD ============= */
#dashboard, #introState { padding: 8px 20px 20px; display: flex; flex-direction: column; gap: 16px; }
.center-state { padding: 60px 24px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.spinner { width: 34px; height: 34px; 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); } }

.intro-card { padding: 46px 24px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; color: var(--ink-500); }
.intro-card svg { color: var(--ink-500); margin-bottom: 4px; }
.intro-card h3 { font-size: 17px; color: var(--ink-900); }
.intro-card p { font-size: 13.5px; max-width: 40ch; }

.current-card { padding: 22px; background: linear-gradient(135deg, var(--accent), #3a6bf0); color: #fff; border: none; }
.current-top { display: flex; align-items: flex-start; justify-content: space-between; }
.current-place { display: flex; align-items: center; gap: 8px; }
.current-place h2 { font-size: 21px; color: #fff; }
.star-btn { background: rgba(255,255,255,.16); border: none; color: #fff; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.star-btn svg { width: 15px; height: 15px; }
.star-btn.starred { background: var(--warn); color: #fff; }
.star-btn.starred svg { fill: #fff; }
.current-place + p, #placeMeta { color: rgba(255,255,255,.8); font-size: 13px; margin-top: 2px; }
.current-icon svg { width: 62px; height: 62px; }
.current-temp-row { display: flex; align-items: flex-end; gap: 16px; margin-top: 10px; }
.current-temp { font-family: var(--font-display); font-size: 58px; font-weight: 700; line-height: 1; }
.current-desc { display: flex; flex-direction: column; gap: 4px; padding-bottom: 6px; }
.current-desc span:first-child { font-size: 15px; font-weight: 600; }
.current-desc span:last-child { font-size: 13px; color: rgba(255,255,255,.8); }
.current-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; margin-top: 20px; }
.stat-pill { background: rgba(255,255,255,.14); border-radius: var(--radius-sm); padding: 10px 12px; }
.stat-pill span { display: block; font-size: 11px; color: rgba(255,255,255,.75); margin-bottom: 3px; }
.stat-pill b { font-family: var(--font-mono); font-size: 15px; }

.aqi-card { padding: 18px 20px; }
.aqi-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.aqi-head h3 { font-size: 15px; }
.aqi-badge { font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 999px; color: #fff; }
.aqi-body { display: flex; align-items: center; gap: 20px; }
.aqi-value { text-align: center; }
.aqi-value span { display: block; font-family: var(--font-display); font-size: 36px; font-weight: 700; color: var(--ink-900); }
.aqi-value small { font-size: 11px; }
.aqi-mini-stats { display: flex; gap: 14px; flex: 1; flex-wrap: wrap; }
.aqi-mini-stats div { background: var(--surface-2); border-radius: var(--radius-sm); padding: 8px 12px; font-size: 12px; }
.aqi-mini-stats b { display: block; font-family: var(--font-mono); font-size: 14px; color: var(--ink-900); }
.aqi-note { margin-top: 12px; font-size: 12.5px; }

.section-title { font-family: var(--font-display); font-size: 15px; font-weight: 600; padding: 16px 20px 4px; }

.hourly-scroll { display: flex; gap: 10px; overflow-x: auto; padding: 12px 20px 20px; scrollbar-width: thin; }
.hourly-item { flex-shrink: 0; width: 76px; text-align: center; background: var(--surface-2); border-radius: var(--radius-sm); padding: 12px 8px; }
.hourly-item .h-time { font-size: 11.5px; color: var(--ink-500); font-family: var(--font-mono); }
.hourly-item svg { width: 26px; height: 26px; margin: 8px auto; display: block; }
.hourly-item .h-temp { font-size: 14px; font-weight: 700; font-family: var(--font-display); }
.hourly-item .h-rain { font-size: 10.5px; color: var(--accent); margin-top: 4px; }

.daily-list { display: flex; flex-direction: column; padding: 4px 12px 14px; }
.daily-item { display: flex; align-items: center; gap: 12px; padding: 12px 8px; border-bottom: 1px solid var(--border); }
.daily-item:last-child { border-bottom: none; }
.daily-item .d-day { width: 84px; font-size: 13.5px; font-weight: 600; flex-shrink: 0; }
.daily-item svg { width: 26px; height: 26px; flex-shrink: 0; }
.daily-item .d-rain { font-size: 11.5px; color: var(--accent); width: 44px; flex-shrink: 0; }
.daily-item .d-range { flex: 1; display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 13px; justify-content: flex-end; }
.daily-item .d-min { color: var(--ink-500); }
.daily-item .d-bar { width: 60px; height: 4px; background: var(--border); border-radius: 999px; overflow: hidden; }
.daily-item .d-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--orange)); }

/* ============= SECTIONS ============= */
.section { padding: 44px 0; }
.section-head { max-width: 640px; margin: 0 auto 30px; padding: 0 20px; text-align: center; }
.section-head h2 { font-size: 25px; margin-top: 8px; }
.section-head p { margin-top: 10px; font-size: 14.5px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 0 20px; max-width: 900px; margin: 0 auto; }
.step-card { padding: 20px; }
.step-num { font-family: var(--font-mono); font-size: 13px; color: var(--accent); font-weight: 600; margin-bottom: 10px; }
.step-card h3 { font-size: 15px; margin-bottom: 6px; }
.step-card p { font-size: 13px; }

.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 0 20px; max-width: 900px; margin: 0 auto; }
.feature-card { padding: 18px; }
.feature-card svg { width: 20px; height: 20px; color: var(--accent); margin-bottom: 10px; }
.feature-card h4 { font-size: 14px; margin-bottom: 6px; }
.feature-card p { font-size: 12.5px; }

.faq-list { display: flex; flex-direction: column; gap: 10px; padding: 0 20px; max-width: 900px; margin: 0 auto; }
.faq-item { overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 16px 18px; background: transparent; border: none; text-align: left; font-family: var(--font-body); font-weight: 600; font-size: 14px; color: var(--ink-900); cursor: pointer; }
.faq-q svg { width: 16px; height: 16px; color: var(--ink-500); transition: transform .2s ease; flex-shrink: 0; }
.faq-q[aria-expanded="true"] svg { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .2s ease; padding: 0 18px; }
.faq-a p { font-size: 13px; padding-bottom: 16px; }
.faq-item.open .faq-a { max-height: 200px; }

footer { border-top: 1px solid var(--border); padding: 24px 0 60px; }
footer p { font-size: 12.5px; text-align: center; padding: 0 20px; }

.toast-stack { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 10px; z-index: 80; }
.toast { background: var(--ink-900); color: var(--bg); padding: 11px 16px; border-radius: var(--radius-sm); font-size: 13.5px; font-weight: 600; box-shadow: var(--shadow); animation: toast-in .2s ease; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.hide-mobile { display: inline; }

/* ============= RESPONSIVE ============= */
@media (max-width: 760px) {
  h1 { font-size: 26px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .current-temp { font-size: 46px; }
  .hide-mobile { display: none; }
}
@media (max-width: 480px) {
  .steps, .features-grid { grid-template-columns: 1fr; }
  .brand small { display: none; }
  .current-top { flex-direction: row; }
  .aqi-body { flex-direction: column; align-items: flex-start; }
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}