:root {
  --bg: #f6f7f9; --surface: #ffffff; --surface-2: #eef1f5; --text: #17202b; --muted: #5b6676;
  --line: #dde2e9; --accent: #1f6feb; --accent-ink: #ffffff; --danger: #c62828; --warn: #b26a00;
  --ok: #1b7f3b; --personal: #7b3fc4; --radius: 12px; --shadow: 0 1px 2px rgba(16, 24, 40, .06);
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --surface: #161b22; --surface-2: #1f2630; --text: #e6edf3; --muted: #9aa6b4;
    --line: #2b3440; --accent: #4c8dff; --danger: #ff6b6b; --warn: #f0a63a; --ok: #4cc27a; --personal: #b48cff; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }

/* layout */
.top { position: sticky; top: 0; z-index: 5; background: var(--surface); border-bottom: 1px solid var(--line); }
.top-inner { max-width: 1100px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.brand { font-weight: 700; font-size: 18px; }
.nav { display: flex; gap: 4px; overflow-x: auto; flex: 1; scrollbar-width: none; }
.nav a { padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); white-space: nowrap; }
.nav a.on { background: var(--surface-2); color: var(--text); font-weight: 600; }
.who { color: var(--muted); font-size: 13px; white-space: nowrap; }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 80px; }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 26px 0 8px; }
.sub { color: var(--muted); margin: 0 0 16px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }

/* cards and lists */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.card + .card { margin-top: 8px; }
.list { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.item { display: flex; gap: 10px; align-items: flex-start; padding: 10px 14px; border-top: 1px solid var(--line); cursor: pointer; }
.item:first-child { border-top: 0; }
.item:hover { background: var(--surface-2); }
.item .title { font-weight: 600; }
.meta { color: var(--muted); font-size: 13px; }
.empty { color: var(--muted); padding: 12px 14px; }
.callout { border-left: 4px solid var(--accent); }
.callout.warn { border-left-color: var(--warn); }
.callout.danger { border-left-color: var(--danger); }

/* pills */
.pill { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: .03em; padding: 1px 8px;
  border-radius: 999px; background: var(--surface-2); color: var(--muted); vertical-align: middle; }
.pill.personal { color: var(--personal); background: color-mix(in srgb, var(--personal) 14%, transparent); }
.pill.p0, .pill.danger { color: var(--danger); background: color-mix(in srgb, var(--danger) 14%, transparent); }
.pill.p1, .pill.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, transparent); }
.pill.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.pill.accent { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }

/* controls */
.btn { border: 1px solid var(--line); background: var(--surface); padding: 7px 14px; border-radius: 9px; cursor: pointer; }
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.small { padding: 3px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: default; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg button { border: 0; background: var(--surface); padding: 6px 14px; cursor: pointer; }
.seg button.on { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
label.f { display: block; margin: 10px 0; }
label.f > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
textarea { min-height: 70px; resize: vertical; }
input:focus, select:focus, textarea:focus, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.checks label { display: inline-flex; gap: 6px; align-items: center; margin: 0 14px 6px 0; }
.checks input { width: auto; }
.hint { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); font-size: 14px; margin: 8px 0; }

/* auth */
.auth { max-width: 400px; margin: 8vh auto; padding: 0 16px; }
.auth .card { padding: 24px; }

/* modal */
.scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); display: flex; align-items: flex-start; justify-content: center;
  padding: 5vh 12px; overflow-y: auto; z-index: 20; }
.modal { background: var(--surface); border-radius: 14px; width: 100%; max-width: 620px; padding: 20px 22px; box-shadow: 0 10px 40px rgba(0,0,0,.25); }
.modal h1 { font-size: 20px; }
.actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 4px 12px; margin: 12px 0; }
.kv dt { color: var(--muted); font-size: 13px; }
.kv dd { margin: 0; }
.log { border-top: 1px solid var(--line); padding: 8px 0; }

/* calendar */
.cal { display: grid; grid-template-columns: repeat(7, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--line); gap: 1px; }
.cal .dow { background: var(--surface-2); text-align: center; font-size: 12px; color: var(--muted); padding: 4px; }
.cal .day { background: var(--surface); min-height: 96px; padding: 4px 5px; cursor: pointer; overflow: hidden; min-width: 0; }
.cal .day.out { background: var(--bg); color: var(--muted); }
.cal .day.today .n { background: var(--accent); color: var(--accent-ink); border-radius: 999px; padding: 0 6px; }
.cal .day.sel { outline: 2px solid var(--accent); outline-offset: -2px; }
.cal .n { font-size: 12px; font-weight: 600; }
.chip { display: block; font-size: 11.5px; line-height: 1.35; padding: 1px 5px; margin-top: 2px; border-radius: 5px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; background: color-mix(in srgb, var(--accent) 14%, transparent); }
.chip.personal { background: color-mix(in srgb, var(--personal) 16%, transparent); }
.chip.due { background: color-mix(in srgb, var(--warn) 16%, transparent); }
@media (max-width: 640px) {
  .cal .day { min-height: 54px; }
  .chip { font-size: 0; height: 6px; padding: 0; margin-top: 3px; }
  .kv { grid-template-columns: 1fr; }
  .who { display: none; }
}

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 10px; z-index: 40; max-width: 90vw; }

/* spacing helpers (no inline styles: the page's policy forbids them) */
.mt8 { margin-top: 8px; } .mt12 { margin-top: 12px; } .mt14 { margin-top: 14px; } .my12 { margin: 12px 0; }
.gap { height: 10px; } .auto { width: auto; } .when { width: 90px; flex: none; } .strong { font-weight: 700; }
.block { width: 100%; } .static { cursor: default; } .static:hover { background: none; }
a.plain { text-decoration: none; color: inherit; display: block; }
@media (max-width: 520px) {
  .brand { display: none; }
  .top-inner { padding: 8px 8px; }
  .nav a { padding: 6px 9px; }
}