/* BLOIST-ANNOTATED-FILE: styles.css
   PURPOSE: Site-wide styling for www.bloist.com.
   WHERE TO EDIT:
     - Color theme variables live near the top (look for :root { --... }).
     - Buttons and navigation styles are used across every page.
   COMMON ISSUES + FIXES:
     - Dropdowns closing too fast: see assets/js/main.js event handling (pointer + focus).
     - Contrast problems: adjust --text / --muted / --card and re-test headings.
*/

:root{
  --bg:#f4f1ea;
  --panel:#fbf9f4;
  --card:#ffffff;
  --text:#2e2b26;
  --muted:#5c564d;
  --accent:#6b5f3b;
  --accent2:#3a6a7a;
  --danger:#b24a3a;
  --border:rgba(60,50,40,.18);
  --shadow: 0 14px 40px rgba(0,0,0,.10);
  --radius:18px;
  --max:1140px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:var(--sans); color:var(--text);
  background: radial-gradient(1200px 700px at 20% -10%, rgba(74,163,255,.22), transparent 55%),
              radial-gradient(900px 600px at 90% 0%, rgba(77,214,167,.18), transparent 50%),
              linear-gradient(180deg, #061021, #060913 40%, #050612);
  line-height:1.55;
}
a{color:inherit; text-decoration:none}
img{max-width:100%; height:auto; display:block}
.container{max-width:var(--max); margin:0 auto; padding:0 20px}
.skip-link{position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden}
.skip-link:focus{left:12px; top:12px; width:auto; height:auto; padding:10px 12px; background:#fff; color:#000; border-radius:10px; z-index:9999}

header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(12px);
  background: rgba(6,10,18,.62);
  border-bottom:1px solid var(--border);
}
.navbar{display:flex; align-items:center; gap:14px; padding:14px 0}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:.2px}
.brand .logo{
  width:34px; height:34px; border-radius:10px;
  background: linear-gradient(135deg, rgba(74,163,255,.95), rgba(77,214,167,.95));
  box-shadow: 0 10px 28px rgba(0,0,0,.35);
}
.brand span{font-size:16px}
.nav-grow{flex:1}
.nav-toggle{
  display:none; border:1px solid var(--border); background:rgba(255,255,255,.04); color:var(--text);
  border-radius:12px; padding:10px 12px; cursor:pointer;
}
.nav-links{display:flex; align-items:center; justify-content:flex-start; gap:10px}
.nav-links ul{list-style:none; padding:0; margin:0; display:flex; align-items:center; gap:8px}
.nav-links li{position:relative}
.nav-links > ul > li > a{
  display:flex; align-items:center; gap:6px;
  padding:10px 10px; border-radius:12px; color:var(--muted);
}
.nav-links > ul > li > a:hover,
.nav-links > ul > li > a:focus{
  color:var(--text);
  background:rgba(255,255,255,.05);
}
.caret{font-size:12px; opacity:.9}
.dropdown{
  position:absolute; top:48px; left:0;
  min-width:260px;
  padding:8px;
  border-radius:16px;
  background: rgba(11,18,32,.92);
  border:1px solid var(--border);
  box-shadow: var(--shadow);
  display:none;
}
.dropdown a{
  display:flex; gap:10px; align-items:flex-start;
  padding:10px 12px; border-radius:14px; color:var(--text);
}
.dropdown a:hover, .dropdown a:focus{background:rgba(255,255,255,.06)}
.dropdown small{display:block; color:var(--muted); font-size:12px; margin-top:2px}
.dropdown .icon{
  width:28px; height:28px; border-radius:12px;
  background:rgba(74,163,255,.14); display:grid; place-items:center; flex:0 0 auto;
}
.dropdown .icon.green{background:rgba(77,214,167,.14)}
.dropdown .icon.red{background:rgba(255,107,107,.16)}

.has-dropdown:hover > .dropdown{display:block}
.has-dropdown:focus-within > .dropdown{display:block}

.submenu{
  position:absolute; top:0; left:calc(100% + 8px);
  min-width:260px;
}
.nav-cta{margin-left:auto; display:flex; align-items:center; gap:10px}
.pill{
  padding:10px 12px; border-radius:999px; border:1px solid var(--border);
  color:var(--text); background:rgba(255,255,255,.04);
}
.pill:hover{background:rgba(255,255,255,.06)}
.pill.accent{
  border-color:rgba(77,214,167,.4);
  background:rgba(77,214,167,.12);
}
.pill.accent:hover{background:rgba(77,214,167,.18)}
.pill.help{
  border-color:rgba(255,255,255,.14);
  background: linear-gradient(135deg, rgba(74,163,255,.12), rgba(77,214,167,.10));
}

.hero{
  padding:54px 0 28px;
}
.hero-grid{
  display:grid; grid-template-columns: 1.15fr .85fr; gap:28px; align-items:center;
}
h1{font-size: clamp(34px, 4.2vw, 54px); line-height:1.05; margin:0 0 14px}
.lede{color:var(--muted); font-size:18px; margin:0 0 20px}
.kpis{display:flex; gap:12px; flex-wrap:wrap; margin:18px 0 0}
.kpi{
  padding:10px 12px; border-radius:14px; border:1px solid var(--border);
  background:rgba(255,255,255,.03);
}
.kpi b{display:block; font-size:14px}
.kpi span{font-size:12px; color:var(--muted)}
.card{
  border:1px solid var(--border); border-radius:var(--radius); overflow:hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
}
.card .card-body{padding:16px}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:12px; color:var(--muted);
  border:1px solid var(--border); background:rgba(0,0,0,.15);
  padding:8px 10px; border-radius:999px;
}
.grid-3{display:grid; grid-template-columns:repeat(3, 1fr); gap:16px; margin:22px 0 0}
.feature{
  padding:16px; border-radius:18px; border:1px solid var(--border);
  background:rgba(255,255,255,.03);
}
.feature h3{margin:0 0 8px; font-size:16px}
.feature p{margin:0; color:var(--muted)}
.section{padding:42px 0}
.section h2{font-size:28px; margin:0 0 10px}
.section p{color:var(--muted); margin:0 0 14px}
.split{
  display:grid; grid-template-columns: 1fr 1fr; gap:18px; align-items:start;
}
.callout{
  padding:18px; border-radius:18px;
  border:1px solid rgba(77,214,167,.35);
  background:rgba(77,214,167,.10);
}
.callout b{display:block; margin-bottom:8px}
.muted-box{
  padding:18px; border-radius:18px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
}
.table{
  width:100%; border-collapse:separate; border-spacing:0;
  overflow:hidden; border:1px solid var(--border); border-radius:18px;
}
.table th, .table td{padding:12px 12px; border-bottom:1px solid var(--border)}
.table th{color:var(--muted); font-weight:700; text-align:left; background:rgba(255,255,255,.03)}
.table tr:last-child td{border-bottom:none}
.footer{
  padding:28px 0; border-top:1px solid var(--border); color:var(--muted);
}
.footer-grid{
  display:grid; grid-template-columns: 1.2fr .8fr; gap:18px; align-items:start;
}
.small{font-size:13px}
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:12px 14px; border-radius:14px;
  background:rgba(74,163,255,.14);
  border:1px solid rgba(74,163,255,.35);
  color:var(--text);
}
.btn:hover{background:rgba(74,163,255,.20)}
.btn.secondary{background:rgba(255,255,255,.04); border-color:var(--border); color:var(--text)}
.btn.secondary:hover{background:rgba(255,255,255,.06)}
.btn.green{background:rgba(77,214,167,.12); border-color:rgba(77,214,167,.35)}
.btn.green:hover{background:rgba(77,214,167,.18)}
.note{font-family:var(--mono); font-size:12px; color:var(--muted)}
hr.sep{border:none; border-top:1px solid var(--border); margin:18px 0}

/* forms */
input, select{
  width:100%;
  padding:12px 12px;
  border-radius:14px;
  border:1px solid var(--border);
  background:rgba(0,0,0,.18);
  color:var(--text);
}
label{display:block; color:var(--muted); font-size:13px; margin:8px 0 6px}
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.output{
  font-family:var(--mono);
  padding:12px;
  border-radius:14px;
  border:1px solid rgba(77,214,167,.28);
  background:rgba(77,214,167,.08);
}

/* mobile */
@media (max-width: 960px){
  .hero-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed; inset:64px 14px auto 14px;
    background:rgba(11,18,32,.96);
    border:1px solid var(--border);
    border-radius:20px;
    padding:10px;
    display:none;
    box-shadow: var(--shadow);
  }
  .nav-links.open{display:block}
  .nav-links ul{display:block}
  .nav-links > ul > li > a{justify-content:space-between}
  .dropdown{
    position:static; display:none; padding:6px; margin:6px 0 10px;
  }
  .dropdown.open{display:block}
  .submenu{position:static; min-width:unset}
  .has-dropdown:hover > .dropdown{display:none}
  .nav-cta{margin-left:0; display:grid; grid-template-columns: 1fr; gap:10px; padding-top:6px}
}

/* === Bloist: Parchment theme + stable dropdowns (override) === */
body{
  background: var(--bg);
  color: var(--text);
}

a{ color: var(--accent); }
a:hover{ text-decoration: underline; }

header, .navbar{
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.card, .panel, .section, .content-card{
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: none;
}

/* Dropdown: make it easier to move mouse into menu without it closing */
.nav-links li{ position: relative; }
.dropdown{
  background: rgba(251,249,244,.98);
  border: 1px solid var(--border);
  box-shadow: 0 10px 28px rgba(0,0,0,.10);
  top: calc(100% + 6px) !important;
  left: 0;
}

/* Invisible "bridge" to prevent hover gaps */
.dropdown::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-10px;
  height:10px;
}

/* Keep open when hovering the menu itself */
.has-dropdown:hover > .dropdown,
.has-dropdown:focus-within > .dropdown,
.has-dropdown > .dropdown:hover,
.nav-links li:hover > .dropdown,
.nav-links li:focus-within > .dropdown,
.nav-links li > .dropdown:hover{
  display:block;
}

.dropdown a{ color: var(--text); }
.dropdown a:hover, .dropdown a:focus{ background: rgba(60,50,40,.08); }

/* If any dark-mode overrides exist, force parchment */
@media (prefers-color-scheme: dark){
  body{ background: var(--bg); color: var(--text); }
  header, .navbar{ background: var(--panel); }
}


/* Return-to-top helper */
.return-top{
  margin-top: 18px;
  display: flex;
  justify-content: flex-end;
}
.return-top a{
  display: inline-block;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}
.return-top a:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0,0,0,.08);
}



/* === Navigation helpers: left-side Return To Top === */
#returnTopFloat{
  position: fixed;
  left: 14px;
  bottom: 18px;
  z-index: 2000;
  display: none;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--bg-card);
  color: var(--text-link);
  box-shadow: 0 6px 18px var(--shadow-soft);
  text-decoration: none;
  font-weight: 600;
}
#returnTopFloat.show{ display: inline-flex; align-items:center; gap:8px; }
#returnTopFloat:focus, #returnTopFloat:hover{
  text-decoration: none;
  filter: brightness(0.98);
}

/* Existing per-section return-top block: align left and keep below dividers */
.return-top{
  display: flex;
  justify-content: flex-start;
  margin-top: 14px;
}
.return-top a{
  display: inline-flex;
  align-items:center;
  gap:8px;
}


/* === Air quality charts (live city snapshots) === */
.aq-chart{ margin-top:12px; }
.aq-svg{ width:100%; height:auto; overflow:visible; }
.aq-title{ font-size:12px; font-weight:800; fill:#000; }
.aq-label{ font-size:12px; font-weight:800; fill:#000; }
.aq-value{ font-size:12px; font-weight:800; fill:#000; }
.aq-bar{ fill: rgba(0,0,0,0.10); stroke: rgba(0,0,0,0.25); }
.aq-tooltip{
  position: fixed;
  z-index: 3000;
  max-width: 280px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: var(--bg-card);
  color: #000;
  box-shadow: 0 10px 28px var(--shadow-soft);
  display:none;
  pointer-events:none;
  font-weight: 700;
}
.aq-tooltip .muted{ font-weight:600; color: #333; margin-top:6px; font-size: 12px; }
.aq-tooltip.show{ display:block; }

.section-sources{
  margin-top: 14px;
  display:flex;
  justify-content:flex-start;
}