:root {
  --bg: #0b1020;
  --card: #121a33;
  --muted: #9fb0e0;
  --text: #f4f7ff;
  --accent: #66d9ff;
  --accent2: #7cf29a;
  --warn: #ffd166;
  --danger: #ff7b7b;
  --border: #273257;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top right, #1a2450 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  width: min(100%, 860px);
  margin: 0 auto;
  padding: 16px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(11,16,32,0.75);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top, 0px);
}

.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.top .wrap > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.app-back-link {
  font-size: 14px;
  color: #b6ccff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  background: rgba(124, 242, 154, 0.08);
  white-space: nowrap;
}

.badge {
  display: inline-block;
  border: 1px solid var(--border);
  background: rgba(102,217,255,0.12);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .02em;
}

h1, h2, h3 { line-height: 1.2; margin: 14px 0 8px; }
h1 { font-size: clamp(26px, 6vw, 38px); }
h2 { font-size: clamp(20px, 5vw, 30px); }
h3 { font-size: clamp(17px, 4.3vw, 22px); }

p, li { color: #e9efff; }
.small { color: var(--muted); font-size: 14px; }

.hero {
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(124,242,154,0.12), rgba(102,217,255,0.08));
  border-radius: 16px;
  padding: 14px;
  margin: 14px 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  margin: 12px 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 760px) {
  .grid.two { grid-template-columns: 1fr 1fr; }
}

img.diagram {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0f1834;
}

ul.check {
  list-style: none;
  padding-left: 0;
}
ul.check li { margin: 8px 0; }
ul.check li::before { content: "✅ "; }

ol.steps { padding-left: 20px; }
ol.steps li { margin: 8px 0; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

pre {
  background: #0b132a;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  overflow-x: auto;
  color: #d5e7ff;
  font-size: 13px;
}

.tag {
  display: inline-block;
  margin-right: 6px;
  margin-bottom: 6px;
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: #d7e8ff;
}

.callout {
  border-left: 4px solid var(--warn);
  background: rgba(255,209,102,0.12);
  padding: 10px 12px;
  border-radius: 8px;
}

.footer {
  margin: 28px 0 40px;
  color: var(--muted);
  font-size: 13px;
}

.navlist a {
  display: block;
  padding: 11px 12px;
  margin: 8px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(102,217,255,0.08);
}

.kpi {
  display: inline-block;
  margin: 6px 8px 6px 0;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(124,242,154,0.1);
  font-size: 13px;
}