:root {
  --bg: #fffaf0; --fg: #2b2620; --muted: #7a6f63; --card: #ffffff; --line: #eadfcb;
  --accent: #f5b700; --accent-soft: #fff1c2; --blue: #3b7ddd; --ok: #2f7d4f; --warn: #9a6412; --err: #c53030;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17; --fg: #f1ebe2; --muted: #a89d8f; --card: #26231f; --line: #3a352e;
    --accent: #f5b700; --accent-soft: #4a3d12; --blue: #6aa1f0; --ok: #5fc48a; --warn: #e0a84a; --err: #f08080;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; }
#app { max-width: 720px; margin: 0 auto; padding: 12px 16px calc(24px + env(safe-area-inset-bottom)); }
header { display: flex; justify-content: space-between; align-items: center; }
h1 { font-size: 1.4rem; margin: 8px 0; }
h2 { font-size: 1.1rem; margin: 24px 0 8px; }
h3, h4 { margin: 0; font-size: 1rem; }
.muted { color: var(--muted); }
.center { text-align: center; margin-top: 30vh; }
button { font: inherit; cursor: pointer; }
button:disabled { opacity: .5; cursor: not-allowed; }
.link { border: 0; background: none; color: var(--muted); text-decoration: underline; }

nav { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 8px 0 12px;
  position: sticky; top: 0; background: var(--bg); z-index: 1; }
.tab { flex: 1; padding: 10px; border: 0; border-bottom: 3px solid transparent; background: none; color: var(--muted); }
.tab.on { color: var(--fg); font-weight: 700; border-color: var(--accent); }

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
@media (min-width: 560px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.stat .label { font-size: .85rem; color: var(--muted); }
.stat .big { font-size: 1.5rem; font-weight: 700; }
.bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; margin-top: 6px; }
.bar i { display: block; height: 100%; background: var(--accent); transition: width .3s; }

.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks label { display: flex; align-items: center; gap: 12px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; padding: 12px; cursor: pointer; }
.checks label.done { background: var(--accent-soft); border-color: var(--accent); }
.checks input { width: 22px; height: 22px; accent-color: var(--accent); }
.checks .sticker { font-size: 1.6rem; }
.checks small { display: block; color: var(--muted); font-size: .8rem; }
.empty { background: var(--card); border: 1px dashed var(--line); border-radius: 12px; padding: 16px; color: var(--muted); }

.banner { padding: 10px 12px; border-radius: 10px; margin: 8px 0; }
.banner.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.banner.warn { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); }
.banner.err { background: color-mix(in srgb, var(--err) 15%, transparent); color: var(--err); }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin: 12px 0; }
.head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.week { border-top: 1px solid var(--line); padding: 10px 0; margin-top: 10px; }
.habits { list-style: none; padding: 0; margin: 8px 0; }
.habits li { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 4px 0 4px 12px; }
.habits small { color: var(--muted); }
.row { display: flex; gap: 6px; margin: 8px 0; }
.row input { flex: 1; min-width: 0; }
input, select { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); }
form button { padding: 8px 14px; border: 0; border-radius: 8px; background: var(--accent); color: #2b2620; font-weight: 600; }
.del { border: 1px solid var(--line); background: none; color: var(--muted); border-radius: 8px; padding: 4px 10px; font-size: .85rem; flex-shrink: 0; }
.days { display: flex; flex-wrap: wrap; gap: 4px; }
.day { display: flex; align-items: center; gap: 2px; border: 1px solid var(--line); border-radius: 8px; padding: 4px 8px; font-size: .9rem; }

.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal .hd { text-align: center; font-weight: 600; color: var(--muted); font-size: .85rem; }
.cal .cell { background: var(--card); border: 1px solid var(--line); border-radius: 8px; min-height: 60px;
  padding: 4px; font-size: 12px; word-break: break-all; }
.cal .full { background: var(--accent-soft); border-color: var(--accent); }
.cal .today { outline: 2px solid var(--blue); outline-offset: -2px; }
.empty-star { opacity: .35; }
.hbar { display: grid; grid-template-columns: 60px 1fr 44px; align-items: center; gap: 8px; margin: 6px 0; }
.hbar .bar { margin: 0; height: 14px; }
.goal { margin: 8px 0; }

.lock { max-width: 360px; margin: 20vh auto 0; text-align: center; }
.lock form { display: flex; gap: 6px; }
.lock input { flex: 1; min-width: 0; }
.err-text { color: var(--err); }

.fly { position: fixed; bottom: -40px; font-size: 28px; pointer-events: none; z-index: 10; animation: fly 1.8s ease-out forwards; }
@keyframes fly { to { transform: translateY(-110vh) rotate(200deg); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .fly { display: none; } .bar i { transition: none; } }