:root{
  --bg:#F6F3EE;
  --surface:#FFFFFF;
  --surface-2:#FBF9F4;
  --border:#E4DDD1;
  --ink:#1E2233;
  --ink-soft:#6B6A72;
  --accent-dawn:#D9713F;
  --accent-trading:#2E7CB8;
  --accent-evening:#7A5FA8;
  --accent-night:#333F63;
  --good:#C94A4A;
  --low:#3E6FB0;
  --ring-track:#E4DDD1;
  --shadow:0 1px 2px rgba(30,34,51,0.06), 0 8px 24px -12px rgba(30,34,51,0.16);
  --nav-h:64px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#14151C; --surface:#1B1D27; --surface-2:#20222E; --border:#2C2F3D;
    --ink:#ECEAE4; --ink-soft:#A0A0AC;
    --accent-dawn:#E58A5C; --accent-trading:#5FA3DA; --accent-evening:#A488CE; --accent-night:#8A94C4;
    --good:#E07272; --low:#6FA0E0; --ring-track:#2C2F3D;
    --shadow:0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.55);
  }
}
:root[data-theme="dark"]{
  --bg:#14151C; --surface:#1B1D27; --surface-2:#20222E; --border:#2C2F3D;
  --ink:#ECEAE4; --ink-soft:#A0A0AC;
  --accent-dawn:#E58A5C; --accent-trading:#5FA3DA; --accent-evening:#A488CE; --accent-night:#8A94C4;
  --good:#E07272; --low:#6FA0E0; --ring-track:#2C2F3D;
  --shadow:0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.55);
}
*{ box-sizing:border-box; }
[hidden]{ display:none !important; }
html{ color-scheme: light dark; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Zen Kaku Gothic New','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;
  padding:24px 20px calc(var(--nav-h) + 32px);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
#app{ max-width:720px; margin:0 auto; display:flex; flex-direction:column; gap:28px; }

/* ---- offline banner ---- */
.offline-banner{
  position:fixed; top:0; left:0; right:0; z-index:20;
  background:var(--accent-dawn); color:#fff; text-align:center;
  font-size:13px; padding:8px 12px;
}
.offline-banner[hidden]{ display:none; }

/* ---- header / progress ---- */
.app-header{ display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap; padding-bottom:20px; border-bottom:1px solid var(--border); }
.eyebrow{ margin:0 0 4px; font-family:'JetBrains Mono','SF Mono',Consolas,monospace; font-size:11px; letter-spacing:0.14em; text-transform:uppercase; color:var(--ink-soft); }
.app-header h1{ margin:0; font-family:'Shippori Mincho','Hiragino Mincho ProN',serif; font-weight:700; font-size:clamp(24px,4vw,32px); text-wrap:balance; }
.date{ margin:6px 0 0; color:var(--ink-soft); font-size:14px; }
.progress-wrap{ position:relative; width:104px; height:104px; flex-shrink:0; }
.ring{ transform:rotate(-90deg); }
.ring circle{ fill:none; stroke-width:8; stroke-linecap:round; }
.ring-track{ stroke:var(--ring-track); }
.ring-fill{ stroke:var(--ring-accent, var(--accent-trading)); transition:stroke-dasharray .4s ease; }
.progress-num{ position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; }
.progress-pct{ font-family:'JetBrains Mono',monospace; font-variant-numeric:tabular-nums; font-size:22px; font-weight:600; }
.progress-pct .unit{ font-size:12px; color:var(--ink-soft); margin-left:1px; }
.progress-frac{ font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--ink-soft); margin-top:2px; font-variant-numeric:tabular-nums; }

/* ---- blocks ---- */
.timeline{ display:flex; flex-direction:column; gap:16px; }
.block{ background:var(--surface); border:1px solid var(--border); border-left:3px solid var(--block-accent); border-radius:10px; padding:18px 20px; box-shadow:var(--shadow); }
.block-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:12px; }
.block-title h2{ margin:0; font-family:'Shippori Mincho',serif; font-size:17px; font-weight:600; }
.block-time{ margin:2px 0 0; font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--ink-soft); font-variant-numeric:tabular-nums; }
.block-meta{ display:flex; align-items:center; gap:8px; }
.now-badge{ font-family:'JetBrains Mono',monospace; font-size:10px; letter-spacing:0.06em; color:var(--block-accent); border:1px solid var(--block-accent); border-radius:999px; padding:2px 8px; }
.block-count{ font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--ink-soft); font-variant-numeric:tabular-nums; }
.task-list{ list-style:none; margin:0 0 10px; padding:0; display:flex; flex-direction:column; }
.task{ display:flex; align-items:flex-start; gap:10px; padding:8px 0; border-bottom:1px solid var(--border); }
.task:last-child{ border-bottom:none; }
.task-check{ flex-shrink:0; width:22px; height:22px; margin-top:1px; border-radius:6px; border:1.5px solid var(--ink-soft); background:transparent; display:flex; align-items:center; justify-content:center; cursor:pointer; padding:0; }
.task-check svg{ opacity:0; stroke:#fff; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round; fill:none; }
.task.is-done .task-check{ background:var(--block-accent); border-color:var(--block-accent); }
.task.is-done .task-check svg{ opacity:1; }
.task-text{ flex:1; font-size:14.5px; line-height:1.5; outline:none; padding:2px; border-radius:4px; }
.task-text:focus{ box-shadow:0 0 0 2px var(--block-accent); }
.task.is-done .task-text{ color:var(--ink-soft); text-decoration:line-through; text-decoration-color:var(--border); }
.task-del{ flex-shrink:0; background:none; border:none; cursor:pointer; color:var(--ink-soft); font-size:18px; line-height:1; padding:2px 6px; border-radius:4px; }
.task-del:hover{ color:var(--good); background:var(--surface-2); }
.task-del:focus-visible, .task-check:focus-visible, .task-text:focus-visible{ outline:2px solid var(--block-accent); outline-offset:2px; }
.empty{ color:var(--ink-soft); font-size:13px; padding:8px 0; }
.add-form{ display:flex; gap:8px; margin-top:4px; }
.add-form input{ flex:1; border:1px solid var(--border); background:var(--surface-2); border-radius:8px; padding:9px 10px; font-size:13.5px; color:var(--ink); font-family:inherit; }
.add-form input:focus{ outline:none; border-color:var(--block-accent); }
.add-form button{ border:1px solid var(--border); background:var(--surface-2); color:var(--ink-soft); border-radius:8px; padding:9px 14px; font-size:13px; cursor:pointer; font-family:inherit; }
.add-form button:hover{ color:var(--ink); border-color:var(--block-accent); }

/* ---- history ---- */
.history{ padding-top:8px; }
.history h2{ font-family:'Shippori Mincho',serif; font-size:15px; font-weight:600; margin:0 0 14px; color:var(--ink-soft); }
.hist-chart{ display:flex; align-items:flex-end; gap:6px; height:64px; padding:0 2px; overflow-x:auto; }
.hist-col{ display:flex; flex-direction:column; align-items:center; gap:6px; flex:1; min-width:20px; }
.hist-bar{ width:10px; border-radius:3px 3px 0 0; align-self:flex-end; }
.hist-label{ font-family:'JetBrains Mono',monospace; font-size:9px; color:var(--ink-soft); font-variant-numeric:tabular-nums; }
.hist-col.is-today .hist-label{ color:var(--ink); font-weight:600; }

/* ---- static pages (usage / changelog) ---- */
.page{ display:flex; flex-direction:column; gap:20px; }
.page h1{ margin:0; font-family:'Shippori Mincho',serif; font-size:24px; font-weight:700; }
.page-lead{ color:var(--ink-soft); font-size:14px; margin:-8px 0 0; }
.card{ background:var(--surface); border:1px solid var(--border); border-radius:10px; padding:18px 20px; box-shadow:var(--shadow); }
.card h2{ margin:0 0 10px; font-family:'Shippori Mincho',serif; font-size:16px; font-weight:600; display:flex; align-items:center; gap:8px; }
.card h2 .step-num{ font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--surface); background:var(--accent-trading); border-radius:999px; width:22px; height:22px; display:inline-flex; align-items:center; justify-content:center; flex-shrink:0; }
.card p{ margin:0; font-size:14px; line-height:1.7; color:var(--ink); }
.card p + p{ margin-top:8px; }
.card ul{ margin:8px 0 0; padding-left:1.2em; font-size:14px; line-height:1.7; }

.changelog-entry{ display:flex; flex-direction:column; gap:6px; }
.changelog-version{ display:flex; align-items:baseline; gap:10px; }
.changelog-version .v{ font-family:'JetBrains Mono',monospace; font-weight:600; font-size:14px; color:var(--accent-trading); }
.changelog-version .d{ font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--ink-soft); font-variant-numeric:tabular-nums; }
.changelog-entry ul{ margin:2px 0 0; padding-left:1.2em; font-size:13.5px; line-height:1.7; color:var(--ink); }

/* ---- bottom nav ---- */
.bottom-nav{
  position:fixed; left:0; right:0; bottom:0; z-index:15;
  display:flex; height:var(--nav-h);
  background:var(--surface); border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
}
.nav-btn{
  flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px;
  background:none; border:none; color:var(--ink-soft); font-family:inherit; font-size:11px; cursor:pointer;
}
.nav-btn svg{ width:22px; height:22px; stroke:currentColor; fill:none; stroke-width:1.8; }
.nav-btn.is-active{ color:var(--accent-trading); }
.nav-btn:focus-visible{ outline:2px solid var(--accent-trading); outline-offset:-2px; }

/* ---- auth overlay ---- */
.overlay{
  position:fixed; inset:0; z-index:30; background:rgba(20,21,28,0.55);
  display:flex; align-items:center; justify-content:center; padding:20px;
}
.overlay[hidden]{ display:none; }
.auth-box{ background:var(--surface); border-radius:14px; padding:26px 24px; max-width:360px; width:100%; box-shadow:var(--shadow); }
.auth-box h2{ margin:0 0 8px; font-family:'Shippori Mincho',serif; font-size:19px; }
.auth-box p{ margin:0 0 16px; font-size:13.5px; color:var(--ink-soft); line-height:1.6; }
.auth-box input{ width:100%; border:1px solid var(--border); background:var(--surface-2); border-radius:8px; padding:11px 12px; font-size:15px; color:var(--ink); font-family:inherit; }
.auth-box input:focus{ outline:none; border-color:var(--accent-trading); }
.auth-box button{ margin-top:14px; width:100%; border:none; background:var(--accent-trading); color:#fff; border-radius:8px; padding:11px; font-size:14.5px; font-weight:600; cursor:pointer; font-family:inherit; }
.auth-error{ color:var(--good); font-size:12.5px; margin-top:8px; }

@media (prefers-reduced-motion: reduce){ .ring-fill{ transition:none; } }
@media (max-width:480px){
  body{ padding:20px 16px calc(var(--nav-h) + 28px); }
  .app-header{ flex-direction:column; align-items:flex-start; }
}