:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #153047;
  --ink-soft: #5e7688;
  --accent: #0f6ea8;
  --accent-2: #2da687;
  --border: #d6e1ea;
  --shadow: 0 22px 48px rgba(16, 43, 66, 0.08);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: linear-gradient(180deg, #eaf2f8 0%, var(--bg) 220px); color: var(--ink); }
.site-header { display: flex; justify-content: space-between; gap: 24px; padding: 28px 32px 18px; }
.site-header h1 { margin: 0; }
.site-header p, .identity, .muted { color: var(--ink-soft); }
.main-nav { display: flex; flex-wrap: wrap; gap: 10px; padding: 0 32px 24px; }
.main-nav a, .button-link, button { border: 0; border-radius: 999px; background: #e8f1f7; color: var(--ink); padding: 10px 16px; text-decoration: none; font-weight: 600; cursor: pointer; }
.main-nav a.active, .button-link, button { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.page-shell { padding: 0 32px 40px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 24px; padding: 24px; box-shadow: var(--shadow); margin-bottom: 24px; }
.narrow { max-width: 520px; margin: 48px auto; }
.flash { margin-bottom: 16px; padding: 14px 18px; border-radius: 18px; background: #eef8ff; border: 1px solid #b8daef; }
.grid { display: grid; gap: 16px; }
.two-up { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.span-two { grid-column: 1 / -1; }
label { display: grid; gap: 8px; font-weight: 600; }
input, select, textarea, pre, table { width: 100%; font: inherit; }
input, select, textarea { border: 1px solid var(--border); border-radius: 14px; padding: 12px 14px; background: #fbfdff; }
textarea { resize: vertical; }
pre { white-space: pre-wrap; background: #0b2236; color: #ecf6ff; border-radius: 18px; padding: 16px; overflow-x: auto; }
.notes-layout { display: grid; grid-template-columns: minmax(220px, 320px) 1fr; gap: 20px; }
.list-panel { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.list-panel li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 14px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; }
.stats-grid article { border: 1px solid var(--border); border-radius: 18px; padding: 18px; background: #f8fbfd; }
.stats-grid strong { display: block; font-size: 2rem; }
.button-row, .stack { display: flex; flex-wrap: wrap; gap: 10px; }
table { border-collapse: collapse; }
table th, table td { border-bottom: 1px solid var(--border); text-align: left; padding: 12px 10px; vertical-align: top; }
@media (max-width: 900px) {
  .notes-layout { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; }
  .page-shell, .main-nav, .site-header { padding-left: 18px; padding-right: 18px; }
}