:root{
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #0ea5e9;
  --accent-contrast: #ffffff;
  --badge-bg: #e0f2fe;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0f14;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --card: #0f1720;
    --border: #1f2937;
    --accent: #38bdf8;
    --accent-contrast: #00121a;
    --badge-bg: #082f41;
  }
}

/* Layout */
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 800px at 100% -10%, rgba(14,165,233,.08), transparent 50%),
    radial-gradient(900px 600px at -10% 100%, rgba(14,165,233,.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.wrap{
  max-width: 920px;
  margin: clamp(16px,5vw,48px) auto;
  padding: 0 20px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(18px,3.5vw,36px);
  box-shadow:
    0 10px 30px rgba(0,0,0,.06),
    inset 0 1px 0 rgba(255,255,255,.02);
}

/* Header */
.header{
  display:flex;
  gap:16px;
  align-items:center;
  margin-bottom: 14px;
}
.logo{
  display:grid;
  place-items:center;
  width:56px;height:56px;
  border-radius:14px;
  background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
  color: var(--accent-contrast);
  font-weight: 800;
  letter-spacing: .5px;
  box-shadow: 0 8px 24px rgba(14,165,233,.35);
  user-select:none;
}
h1{
  font-size: clamp(22px, 2.6vw, 34px);
  line-height: 1.2;
  margin:0;
}
.app-sub{
  margin: 2px 0 0;
  color: var(--muted);
  font-size: .95rem;
}

/* Meta badges */
.meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px 10px;
  margin: 14px 0 26px;
}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  background: var(--badge-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: .85rem;
}
.badge strong{font-weight:700}

/* Section */
section{
  border-top: 1px dashed var(--border);
  padding-top: 20px;
  margin-top: 20px;
}
h2{
  font-size: clamp(18px,2.1vw,24px);
  margin: 6px 0 10px;
  line-height: 1.25;
}
p{margin: 10px 0}
ul{margin: 8px 0 10px 1.2rem}
li{margin: 6px 0}

/* Footer */
.footer{
  display:flex; justify-content:space-between; gap:12px; align-items:center;
  border-top: 1px solid var(--border);
  margin-top: 28px;
  padding-top: 16px;
  color: var(--muted);
  font-size: .92rem;
  flex-wrap: wrap;
}

/* Utilities */
.muted{color: var(--muted)}
.note{
  border-left: 4px solid var(--accent);
  background: linear-gradient(0deg, rgba(14,165,233,.08), rgba(14,165,233,.04));
  padding: 12px 14px;
  border-radius: 10px;
  margin: 8px 0 2px;
  font-size: .95rem;
}

/* Print */
@media print{
  body{background:#fff}
  .wrap{margin:0; padding:0; max-width:none}
  .card{box-shadow:none; border:0; padding:0}
  .logo{box-shadow:none}
  .badge{border-color:#ccc}
  a[href]:after{content:" (" attr(href) ")"; font-size:.85em}
}