/* Daily Research Explorer — shared stylesheet (Apple HIG inspired).
   Link from root pages as "assets/style.css", from day pages as "../assets/style.css". */
:root{
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",Helvetica,Arial,sans-serif;
  --font-display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,monospace;
  --bg:#f5f5f7; --card:rgba(255,255,255,.72); --card-solid:#fff; --text:#1d1d1f; --muted:#5c5c61;
  --line:rgba(0,0,0,.1); --accent:#0062cc; --accent-soft:rgba(0,98,204,.1); --grid:rgba(0,0,0,.08);
  /* "Why it matters" blue card */
  --why-bg:rgba(0,98,204,.1); --why-border:transparent; --why-title:#0062cc;
  /* default chart palette (pages may override) */
  --c1:#0062cc; --c2:#c93400; --c3:#248a3d; --c4:#8944ab; --cx:#1d1d1f;
  --radius-card:24px; --radius-inner:14px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#000; --card:rgba(44,44,46,.72); --card-solid:#1c1c1e; --text:#f5f5f7; --muted:#a1a1a6;
  --line:rgba(255,255,255,.14); --accent:#64a8ff; --accent-soft:rgba(100,168,255,.16); --grid:rgba(255,255,255,.1);
  --why-bg:rgba(100,168,255,.16); --why-border:transparent; --why-title:#64a8ff;
  --c1:#64a8ff; --c2:#ff9f0a; --c3:#30d158; --c4:#da8fff; --cx:#f5f5f7;
}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.5 var(--font);-webkit-font-smoothing:antialiased}
main{max-width:980px;margin:0 auto;padding:56px 24px 96px}
main.narrow{max-width:860px;padding-top:64px}
a{color:var(--accent)}
a:focus-visible,input:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:8px}
li{margin:6px 0} ul{padding-left:20px;margin:6px 0}

/* Header */
.back{display:inline-block;margin-bottom:28px;text-decoration:none;font-size:15px}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
h1{font-family:var(--font-display);font-size:clamp(32px,5vw,50px);line-height:1.08;letter-spacing:-.022em;margin:10px 0 14px}
h2{font-size:24px;letter-spacing:-.012em;margin:0 0 12px}
.lede{font-size:21px;color:var(--muted);max-width:760px;margin:0}
.authors{color:var(--muted);margin:0 0 6px}

/* Cards */
.card{background:var(--card);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;margin-top:24px}
/* Reusable blue "Why it matters" card: <section class="card why"><h2>Why it matters</h2><p>…</p></section> */
.why{background:var(--why-bg);border-color:var(--why-border)}
.why h2,.why .eyebrow{color:var(--why-title);display:block;margin:0 0 8px}
.why h2{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase}
.why p{font-size:21px;line-height:1.4;margin:0;font-weight:500}

/* Layout */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:760px){.grid{grid-template-columns:1fr}}

/* Sliders & controls */
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px 28px;margin:8px 0 20px}
label{display:flex;justify-content:space-between;gap:12px;font-size:15px;font-weight:600}
label output{font-weight:500;color:var(--accent);font-variant-numeric:tabular-nums}
input[type=range]{width:100%;accent-color:var(--accent);margin-top:8px;height:28px}
.toggle{display:flex;gap:10px;align-items:center;font-size:15px;font-weight:500;margin-top:6px}
.toggle input{width:20px;height:20px;accent-color:var(--accent)}

/* Plot containers */
.plot h3,.plot-title{font-size:17px;margin:0 0 10px}
canvas{width:100%;height:320px;display:block;border-radius:var(--radius-inner);background:var(--card-solid);border:1px solid var(--line)}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;color:var(--muted);margin:10px 0 0}
.legend i{display:inline-block;width:18px;height:3px;border-radius:2px;vertical-align:middle;margin-right:6px}
.legend span::before{content:"";display:inline-block;width:14px;height:3px;border-radius:2px;background:var(--k);margin-right:6px;vertical-align:middle}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-top:6px}
.stat{border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.stat .v{font-size:28px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .l{font-size:13px;color:var(--muted)}

/* Tables */
table{width:100%;border-collapse:collapse;font-size:15px;font-variant-numeric:tabular-nums;margin-top:6px}
th,td{text-align:right;padding:8px 6px;border-bottom:1px solid var(--line)}
th:first-child,td:first-child{text-align:left}
th{color:var(--muted);font-weight:600}

/* Text helpers, math, citation */
.note{font-size:14px;color:var(--muted)}
.warn{color:var(--c2);font-weight:600}
code,.m{font-family:var(--mono);font-size:14px}
code{background:var(--accent-soft);padding:2px 6px;border-radius:6px}
.math{font:15px var(--mono);background:var(--accent-soft);padding:12px 16px;border-radius:var(--radius-inner);overflow-x:auto;margin:10px 0;white-space:pre}
.eq{font-family:"Times New Roman",serif;font-size:19px;text-align:center;margin:14px 0;overflow-x:auto}
.cite{font-size:15px;color:var(--muted)}

/* Gallery grid (index) */
.gallery{display:grid;gap:16px;margin-top:32px}
.gallery-item{display:block;text-decoration:none;color:inherit;background:var(--card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border:1px solid var(--line);border-radius:var(--radius-card);padding:24px}
.gallery-item:hover{border-color:var(--accent)}
.gallery-item:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.gallery-item .date{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.gallery-item .title{font-size:22px;font-weight:600;letter-spacing:-.01em;margin:6px 0}
.gallery-item .summary{color:var(--muted);font-size:15px}
.subtitle{color:var(--muted)}

@media (prefers-reduced-motion:no-preference){a,input,.card,.gallery-item{transition:border-color .2s,opacity .2s}}