:root {
  --bg: #f4f1ea;
  --card: #ffffff;
  --ink: #1f2328;
  --muted: #6b7280;
  --accent: #2f6f4e;
  --accent-ink: #ffffff;
  --line: #e5e1d8;
  --danger: #b4423b;
  --warn-bg: #fff4e5;
  --warn-ink: #7a4b00;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a; --card: #1f2227; --ink: #e8e6e1; --muted: #9aa0a6;
    --accent: #5fb98a; --accent-ink: #0f1a14; --line: #2e3238;
    --danger: #e3736c; --warn-bg: #3a2a10; --warn-ink: #f2c98a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 24px 16px; min-height: 100vh;
  background: var(--bg); color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex; justify-content: center; align-items: flex-start;
}
.card {
  width: 100%; max-width: 480px; background: var(--card);
  border: 1px solid var(--line); border-radius: 14px; padding: 24px;
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
}
h1 { margin: 0; font-size: 1.5rem; }
.sub { margin: 4px 0 20px; color: var(--muted); font-size: .9rem; }
.sub a { color: inherit; }
form { display: flex; gap: 8px; }
input[type=text] {
  flex: 1; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: transparent; color: inherit; font: inherit;
}
input[type=text]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  padding: 10px 16px; border: 0; border-radius: 8px; font: inherit; cursor: pointer;
  background: var(--accent); color: var(--accent-ink);
}
button:disabled { opacity: .5; cursor: default; }
button.link { background: none; color: var(--muted); padding: 4px 6px; }
button.link:hover { color: var(--ink); }
ul { list-style: none; margin: 20px 0 0; padding: 0; }
li {
  display: flex; align-items: center; gap: 10px; padding: 10px 4px;
  border-bottom: 1px solid var(--line);
}
li input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--accent); }
li span { flex: 1; overflow-wrap: anywhere; }
li.done span { text-decoration: line-through; color: var(--muted); }
li .del { background: none; color: var(--muted); padding: 2px 8px; font-size: 1.1rem; }
li .del:hover { color: var(--danger); }
.empty { color: var(--muted); text-align: center; padding: 24px 0; }
footer { display: flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--muted); font-size: .9rem; }
footer span { flex: 1; }
.status { margin-top: 16px; font-size: .9rem; color: var(--muted); min-height: 1.4em; }
.status.error { background: var(--warn-bg); color: var(--warn-ink); padding: 10px 12px; border-radius: 8px; }
.status code { font-size: .85em; }
footer { flex-wrap: wrap; }
.notice { background: var(--warn-bg); color: var(--warn-ink); padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; font-size: .95rem; }
.notice p { margin: 0 0 10px; }
.notice .row { display: flex; gap: 8px; align-items: center; }
.notice button.link { color: inherit; }