:root {
  --bg: #f4f1ea;
  --card: #fffdf8;
  --ink: #1f2a2e;
  --muted: #6b7478;
  --line: #e4ded2;
  --accent: #e8792b;
  --accent-ink: #ffffff;
  --done: #9aa3a6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14191b;
    --card: #1c2326;
    --ink: #e9ecea;
    --muted: #93a0a4;
    --line: #2c3539;
    --accent: #f08a3e;
    --done: #5f6a6e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 16px 24px;
}
.card {
  width: 100%;
  max-width: 560px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
}
h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.01em; }
.sub { margin: 4px 0 0; color: var(--muted); font-size: 0.9rem; }
.add { display: flex; gap: 8px; margin: 22px 0 8px; }
.add input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font: inherit;
}
.add input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
button { font: inherit; cursor: pointer; }
.add button {
  padding: 10px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
.error { color: #c0392b; margin: 0 0 8px; font-size: 0.9rem; }
.empty { color: var(--muted); margin: 20px 0 0; }
.list { list-style: none; margin: 16px 0 0; padding: 0; }
.list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}
.list form { margin: 0; display: flex; }
.check {
  width: 22px; height: 22px;
  border: 2px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--accent-ink);
  font-size: 13px; line-height: 1;
  padding: 0;
}
.done .check { background: var(--accent); border-color: var(--accent); }
.title { flex: 1; overflow-wrap: anywhere; }
.done .title { color: var(--done); text-decoration: line-through; }
time { color: var(--muted); font-size: 0.78rem; white-space: nowrap; }
.delete {
  border: 0; background: transparent; color: var(--muted);
  font-size: 1.3rem; line-height: 1; padding: 0 4px;
}
.delete:hover { color: #c0392b; }
footer { margin-top: 18px; color: var(--muted); font-size: 0.8rem; text-align: center; }
footer a { color: var(--muted); }
code { font-size: 0.78rem; }
@media (max-width: 480px) { time { display: none; } .card { padding: 20px; } }