:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1b1f24;
  --muted: #5d6673;
  --line: #d9dde3;
  --accent: #1f4f8f;
  --accent-text: #ffffff;
  --ok: #e3f3e6;
  --err: #fbe4e4;
  --warn: #9a5b00;
  --bad: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --card: #1c2027;
    --text: #e8ebef;
    --muted: #a0a8b3;
    --line: #333a45;
    --accent: #6ea8ee;
    --accent-text: #0c1117;
    --ok: #1c3322;
    --err: #3a1f1f;
    --warn: #f0b35a;
    --bad: #ff8a80;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
main { max-width: 42rem; margin: 0 auto; padding: 0.75rem 1rem 3rem; }
main.narrow { padding-top: 3rem; }
h1 { font-size: 1.6rem; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; }
a { color: var(--accent); }
nav {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  padding: env(safe-area-inset-top) 0.5rem 0;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}
nav a {
  flex: 1 0 auto;
  text-align: center;
  padding: 0.85rem 0.9rem;
  min-height: 48px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.badge {
  display: inline-block;
  margin-left: 0.35rem;
  min-width: 1.4rem;
  padding: 0 0.4rem;
  border-radius: 1rem;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 0.85rem;
  line-height: 1.4rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin: 0 0 0.75rem;
}
.list { list-style: none; margin: 0; padding: 0; }
.task { display: flex; gap: 0.75rem; align-items: center; }
.grow { flex: 1; min-width: 0; }
.title { font-weight: 600; overflow-wrap: anywhere; }
a.title { color: var(--text); text-decoration: none; }
.meta { display: flex; flex-wrap: wrap; gap: 0.4rem 0.75rem; color: var(--muted); font-size: 0.9rem; margin-top: 0.25rem; }
.muted { color: var(--muted); }
.pill { border: 1px solid var(--line); border-radius: 1rem; padding: 0 0.6rem; }
.overdue { color: var(--bad); font-weight: 600; }
.soon { color: var(--warn); font-weight: 600; }
.done .title { text-decoration: line-through; color: var(--muted); }
.stack > * + * { margin-top: 0.4rem; }
.row { display: flex; gap: 0.75rem; align-items: end; }
.row > div { flex: 1; min-width: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.6rem; }
label, legend { display: block; font-size: 0.9rem; color: var(--muted); margin-top: 0.5rem; }
input, select, textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.55rem 0.7rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
}
input[type="checkbox"] { width: 1.4rem; min-height: 1.4rem; height: 1.4rem; accent-color: var(--accent); }
fieldset { border: 0; padding: 0; margin: 0.5rem 0 0; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  min-height: 48px;
  padding: 0 0.8rem;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  color: var(--text);
  font-size: 1rem;
}
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.1rem;
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.check { min-width: 5rem; border-color: var(--accent); color: var(--accent); font-weight: 600; }
button.link { background: none; border: 0; color: var(--accent); text-decoration: underline; min-height: 44px; }
button.danger-button { background: var(--bad); color: var(--accent-text); border-color: var(--bad); font-weight: 600; }
a.danger { color: var(--bad); }
summary { cursor: pointer; font-weight: 600; min-height: 32px; }
.banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  margin: 0.5rem 0 1rem;
}
.banner.ok { background: var(--ok); }
.banner.err { background: var(--err); }
.banner form { margin: 0; }
.month { justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
code { background: var(--card); padding: 0 0.3rem; border-radius: 4px; }