:root {
  --bg: #F7F7F5; --surface: #FFFFFF; --text: #1C1C1E; --muted: #6B6B6F;
  --primary: #2E5D4B; --primary-text: #fff; --accent: #D98A4E; --locked: #C25454;
  --reflecting: #D9A441; --available: #2E7D5B; --border: #E7E5E0; --chip: #EFEEEA;
  --radius: 16px; --radius-sm: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101312; --surface: #181C1A; --text: #F2F2F0; --muted: #9A9C99;
    --primary: #5FA98A; --primary-text: #0d1512; --accent: #E3A467; --locked: #E07070;
    --reflecting: #E3B95B; --available: #5FC290; --border: #262B28; --chip: #222724;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { min-height: 100vh; line-height: 1.45; }
h1, h2 { margin: 0; }
h1 { font-size: 26px; }
code { background: var(--chip); padding: 1px 6px; border-radius: 6px; font-size: .9em; }
[hidden] { display: none !important; }

.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.logo { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: var(--primary-text); font-size: 15px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.sync { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); display: inline-block; }
.sync.ok .dot { background: var(--available); }
.sync.busy .dot { background: var(--reflecting); }
.sync.err .dot { background: var(--locked); }

.wrap { max-width: 780px; margin: 0 auto; padding: 24px 16px 80px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.muted { color: var(--muted); margin: 4px 0 0; }
.error { color: var(--locked); }
.note { margin: 14px 0 0; padding: 10px 14px; border-radius: var(--radius-sm); background: var(--chip); font-size: 14px; }

.btn { font: inherit; cursor: pointer; border: 1px solid transparent; border-radius: 999px; padding: 10px 18px; background: var(--chip); color: var(--text); }
.btn.primary { background: var(--primary); color: var(--primary-text); font-weight: 600; }
.btn.ghost { background: transparent; border-color: var(--border); }
.btn.danger { color: var(--locked); border-color: var(--locked); background: transparent; }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn:hover { filter: brightness(.96); }
.btn:disabled { opacity: .5; cursor: default; }

.day-strip { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 12px; margin-bottom: 4px; }
.day { flex: 0 0 auto; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 14px; padding: 8px 14px; cursor: pointer; text-align: center; font: inherit; min-width: 72px; }
.day small { display: block; color: var(--muted); font-size: 11px; }
.day.active { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
.day.active small { color: inherit; opacity: .85; }

.summary { margin-bottom: 16px; }
.summary-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.bar { height: 10px; background: var(--chip); border-radius: 999px; overflow: hidden; margin-top: 16px; }
.bar-fill { height: 100%; width: 0; background: var(--primary); transition: width .3s ease; }

.task-list { display: grid; gap: 12px; }
.task { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.task.done { opacity: .72; }
.task-head { display: flex; gap: 12px; align-items: flex-start; }
.tick { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--border); background: transparent; color: var(--primary-text); cursor: pointer; font-size: 15px; display: grid; place-items: center; margin-top: 2px; }
.tick:hover { border-color: var(--primary); }
.task.done .tick { background: var(--available); border-color: var(--available); cursor: default; }
.task.busy .tick { border-color: var(--reflecting); }
.task-main { flex: 1; min-width: 0; }
.task-title { font-weight: 600; font-size: 16px; word-break: break-word; }
.task.done .task-title { text-decoration: line-through; }
.task-desc { color: var(--muted); font-size: 14px; margin-top: 2px; white-space: pre-wrap; }
.meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.pill { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--chip); color: var(--muted); }
.pill.high { color: var(--locked); }
.pill.busy { color: var(--reflecting); }
.pill.done { color: var(--available); }

.subtasks { margin: 12px 0 0 40px; display: grid; gap: 6px; }
.sub { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.sub input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--primary); }
.sub.done span { text-decoration: line-through; color: var(--muted); }
.sub .opt { font-size: 11px; color: var(--muted); }

.task-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0 40px; }
.move-picker { margin: 10px 0 0 40px; }
.empty { text-align: center; padding: 40px 0; }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; display: grid; gap: 12px; }

dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); width: min(560px, calc(100vw - 24px)); padding: 24px; }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog h2 { margin-bottom: 8px; }
label { display: block; margin: 14px 0 6px; font-size: 13px; color: var(--muted); }
label.check { display: inline-flex; align-items: center; gap: 6px; margin: 0; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px;
}
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row-add { display: flex; gap: 8px; align-items: center; }
.row-add input[type=text] { flex: 1; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--border); background: var(--bg); color: var(--text); padding: 6px 12px; border-radius: 999px; cursor: pointer; font: inherit; font-size: 13px; }
.chip.active { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
.draft-sub { display: flex; justify-content: space-between; align-items: center; padding: 6px 10px; background: var(--bg); border-radius: 8px; margin-bottom: 6px; font-size: 14px; }
.draft-sub button { background: none; border: none; color: var(--locked); cursor: pointer; }
.warnings { list-style: none; padding: 0; margin: 12px 0 0; color: var(--accent); font-size: 13px; display: grid; gap: 4px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 12px 18px; border-radius: 12px; max-width: min(92vw, 520px); font-size: 14px; z-index: 20; box-shadow: 0 8px 24px rgba(0,0,0,.25); }

@media (max-width: 520px) {
  .topbar { padding: 12px 14px; }
  .subtasks, .task-actions, .move-picker { margin-left: 0; }
  .row2 { grid-template-columns: 1fr; }
}