:root {
  --paper: #f4efe6;
  --paper-2: #ebe4d6;
  --card: #fbf8f2;
  --ink: #1f1c16;
  --ink-2: #5d564a;
  --ink-3: #8f8676;
  --rule: #ddd4c3;
  --accent: #2f5d4e;      /* pine */
  --accent-soft: #dbe6df;
  --warm: #b4531f;        /* amber, for slips and partial days */
  --warm-soft: #f3dfd0;
  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16140f; --paper-2: #1f1c16; --card: #1d1a14; --ink: #efe8da; --ink-2: #b9b0a0;
    --ink-3: #847b6c; --rule: #332e25; --accent: #7fb59f; --accent-soft: #23362e;
    --warm: #e08a55; --warm-soft: #3a2619; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16140f; --paper-2: #1f1c16; --card: #1d1a14; --ink: #efe8da; --ink-2: #b9b0a0;
  --ink-3: #847b6c; --rule: #332e25; --accent: #7fb59f; --accent-soft: #23362e;
  --warm: #e08a55; --warm-soft: #3a2619; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 15px/1.5 var(--sans); -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; -webkit-tap-highlight-color: transparent; }

.app {
  max-width: 560px; margin: 0 auto;
  padding: calc(env(safe-area-inset-top) + 18px) 16px calc(env(safe-area-inset-bottom) + 96px);
}

/* ---------- header ---------- */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { font: 600 12px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.datenav { display: flex; align-items: center; gap: 4px; }
.datenav button {
  width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--rule);
  background: var(--card); display: grid; place-items: center; font-size: 18px; line-height: 1;
}
.datenav button:disabled { opacity: .35; cursor: default; }
.datenav .label { min-width: 104px; text-align: center; font-weight: 500; font-size: 14px; }
.datenav .label button { width: auto; height: auto; border: 0; background: none; font-size: 12px; color: var(--accent); display: inline; padding: 0; }

.hero { display: flex; align-items: flex-end; justify-content: space-between; margin: 22px 0 14px; gap: 16px; }
.daynum { font: 400 84px/.85 var(--serif); letter-spacing: -.03em; font-variant-numeric: lining-nums; }
.daynum small { font-size: 26px; color: var(--ink-3); letter-spacing: 0; margin-left: 4px; }
.daynum .eyebrow { display: block; font: 600 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px; }
.score { position: relative; width: 88px; height: 88px; flex: none; }
.score svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.score circle { fill: none; stroke-width: 6; }
.score .track { stroke: var(--paper-2); }
.score .fill { stroke: var(--warm); stroke-linecap: round; }
.score.full .fill { stroke: var(--accent); }
.score-text { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.score-text b { font: 600 28px/1 var(--serif); }
.score-text span { font-size: 11px; color: var(--ink-3); margin-top: 2px; }

.ticks { display: grid; grid-template-columns: repeat(30, 1fr); gap: 3px; margin-bottom: 26px; }
.ticks i { height: 22px; border-radius: 3px; background: var(--paper-2); display: block; }
.ticks i.p1 { background: var(--warm-soft); }
.ticks i.p2 { background: color-mix(in srgb, var(--accent) 45%, var(--paper-2)); }
.ticks i.p3 { background: var(--accent); }
.ticks i.cur { outline: 2px solid var(--ink); outline-offset: 1px; }

/* ---------- habit list ---------- */
.section-title {
  font: 600 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin: 26px 0 8px;
}
.cols { margin-top: 24px; }
.block { break-inside: avoid; margin-bottom: 22px; }
.block > .section-title { margin-top: 0; }
.list { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); }
.row { padding: 14px 16px; border-top: 1px solid var(--rule); }
.row:first-child { border-top: 0; }
.row-head { min-width: 0; }
.row h3 { margin: 0; font: 600 15px/1.3 var(--sans); display: flex; align-items: center; gap: 8px; }
.row.inline { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row.inline .row-head { flex: 1; }
.row.inline .seg button { min-width: 46px; }
.row.inline .controls { margin-top: 0; }
.row .sub { color: var(--ink-3); font-size: 13px; margin-top: 2px; }
.why-btn {
  border: 0; background: none; color: var(--ink-3); width: 24px; height: 24px; padding: 0; margin-left: -2px;
  display: inline-grid; place-items: center; border-radius: 50%; flex: none;
}
.why-btn svg { width: 17px; height: 17px; }
.mark { width: 18px; height: 18px; border-radius: 50%; display: inline-grid; place-items: center; font-size: 11px; flex: none; border: 1.5px solid var(--rule); color: transparent; }
.mark.ok { background: var(--accent); border-color: var(--accent); color: var(--card); }
.mark.no { background: var(--warm); border-color: var(--warm); color: var(--card); }

.controls { margin-top: 10px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.seg { display: inline-flex; background: var(--paper-2); border-radius: 10px; padding: 3px; }
.seg button { border: 0; background: none; padding: 7px 14px; border-radius: 8px; font-weight: 500; font-size: 14px; color: var(--ink-2); }
.seg button.on-good { background: var(--accent); color: var(--card); }
.seg button.on-bad { background: var(--warm); color: var(--card); }

.num-input {
  width: 120px; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--rule);
  background: var(--paper); font: 600 18px/1.2 var(--serif); font-variant-numeric: tabular-nums;
}
.num-input.small { width: 96px; }
.text-input {
  width: 100%; margin-top: 10px; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--rule);
  background: var(--paper); font-size: 16px;
}
.text-input::placeholder, .note::placeholder { color: var(--ink-3); }
.time-input { width: 112px; padding: 8px 10px; border-radius: 10px; border: 1px solid var(--rule); background: var(--paper); font-size: 16px; }
.chip-btn {
  white-space: nowrap; border: 1px solid var(--rule); background: var(--paper); border-radius: 999px; padding: 6px 12px;
  font-size: 13px; font-weight: 500; color: var(--ink-2);
}
.chip-btn.primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.bar { height: 6px; border-radius: 3px; background: var(--paper-2); overflow: hidden; margin-top: 10px; }
.bar > i { display: block; height: 100%; background: var(--warm); border-radius: 3px; transition: width .3s; }
.bar.done > i { background: var(--accent); }

.dots { display: inline-flex; gap: 4px; margin-left: auto; align-items: center; color: var(--ink-3); font-size: 12px; }
.dots i { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--ink-3); }
.dots i.on { background: var(--accent); border-color: var(--accent); }


.sleep-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.sleep-grid > div { display: grid; gap: 6px; align-content: start; }
.sleep-grid label { font-size: 12px; color: var(--ink-3); }
.quick { display: flex; flex-wrap: wrap; gap: 4px; }
.quick .chip-btn { padding: 4px 9px; font-size: 12px; }
.note {
  width: 100%; margin-top: 10px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--rule);
  background: var(--paper); font-size: 16px; resize: vertical;
}
.feel-chart { display: flex; align-items: flex-end; gap: 3px; height: 70px; margin: 14px 16px 6px; }
.feel-chart + .table tr:first-child td { border-top: 1px solid var(--rule); }
.feel-chart i { flex: 1; background: var(--accent); border-radius: 3px 3px 0 0; opacity: .85; }
.feel-chart i.empty { background: var(--paper-2); opacity: 1; }
.sleep-grid .st { font-size: 12px; font-weight: 500; }
.st.ok { color: var(--accent); } .st.no { color: var(--warm); }
.in-bed {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px;
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--rule); font-size: 14px; color: var(--ink-2);
}
.in-bed b { font: 600 18px/1 var(--serif); color: var(--ink); margin-left: 4px; }

.banner {
  margin: 0 0 18px; padding: 12px 14px; border-radius: var(--radius); background: var(--warm-soft);
  font-size: 14px; display: flex; gap: 10px; align-items: center; justify-content: space-between;
}
.banner.good { background: var(--accent-soft); }
.footnote { text-align: center; margin: 4px 0 0; color: var(--ink-3); font-size: 13px; }
.footnote.done { color: var(--accent); font-weight: 600; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (hover: hover) {
  .chip-btn:hover, .datenav button:not(:disabled):hover, .grid30 button:not(:disabled):hover { border-color: var(--ink-3); }
  .chip-btn.primary:hover { opacity: .88; }
  .seg button:not(.on-good):not(.on-bad):hover { background: var(--card); color: var(--ink); }
  .why-btn:hover { color: var(--accent); }
  .tabs button:hover { color: var(--ink); }
  .btn:hover { opacity: .9; }
}

/* ---------- progress ---------- */
.grid30 { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.grid30 button {
  aspect-ratio: 1; border: 1px solid var(--rule); border-radius: 10px; background: var(--card);
  font: 600 16px/1 var(--serif); display: grid; place-items: center; position: relative; color: var(--ink-2);
}
.grid30 button small { position: absolute; bottom: 5px; font: 500 9px/1 var(--sans); color: var(--ink-3); }
.grid30 .p1 { background: var(--warm-soft); }
.grid30 .p2 { background: color-mix(in srgb, var(--accent) 35%, var(--card)); color: var(--ink); }
.grid30 .p3 { background: var(--accent); color: var(--card); border-color: var(--accent); }
.grid30 .p3 small { color: var(--card); opacity: .8; }
.grid30 .future { opacity: .4; }
.grid30 .cur { outline: 2px solid var(--ink); outline-offset: 1px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 14px; }
.stat { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 12px; }
.stat b { display: block; font: 600 26px/1.1 var(--serif); }
.stat span { font-size: 12px; color: var(--ink-3); }

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table td { padding: 10px 16px; border-top: 1px solid var(--rule); }
.table tr:first-child td { border-top: 0; }
.table td:last-child { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-2); }

/* ---------- why ---------- */
.why-item { padding: 0; }
.why-item summary { list-style: none; padding: 14px 16px; display: flex; justify-content: space-between; gap: 10px; cursor: pointer; font-weight: 600; }
.why-item summary::-webkit-details-marker { display: none; }
.why-item summary span { font-weight: 500; font-size: 12px; color: var(--ink-3); white-space: nowrap; }
.why-body { padding: 0 16px 16px; }
.prose p, .prose li { color: var(--ink-2); font-size: 14px; }
.prose ul { padding-left: 18px; margin: 6px 0; }
.prose h4 { font: 600 12px/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin: 16px 0 6px; }
.prose .rule-box { background: var(--paper-2); border-radius: 10px; padding: 10px 12px; color: var(--ink); font-size: 14px; }
.prose a, .muted a { color: var(--accent); text-underline-offset: 2px; }
.sources li { font-size: 13px; margin-bottom: 4px; }
.ev { display: inline-block; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

.lede { font: 400 22px/1.3 var(--serif); margin: 8px 0 4px; }
.muted { color: var(--ink-3); font-size: 13px; }

/* ---------- sheet ---------- */
.sheet-backdrop { position: fixed; inset: 0; background: rgb(0 0 0 / .35); z-index: 20; }
.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 21; max-height: 86vh; overflow: auto;
  background: var(--card); border-radius: 20px 20px 0 0; max-width: 560px; margin: 0 auto;
  padding: 10px 18px calc(env(safe-area-inset-bottom) + 22px); box-shadow: 0 -8px 30px rgb(0 0 0 / .15);
}
.sheet .grab { width: 40px; height: 4px; border-radius: 2px; background: var(--rule); margin: 0 auto 12px; }
.sheet h2 { font: 600 24px/1.2 var(--serif); margin: 0 0 4px; }
.sheet-close { position: sticky; top: 0; float: right; border: 0; background: var(--paper-2); width: 32px; height: 32px; border-radius: 50%; font-size: 18px; }

/* ---------- tabs ---------- */
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10; display: flex; justify-content: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px); border-top: 1px solid var(--rule);
  padding: 6px 8px calc(env(safe-area-inset-bottom) + 6px);
}
.tabs button { flex: 1; max-width: 140px; border: 0; background: none; padding: 10px 4px; font-size: 13px; font-weight: 500; color: var(--ink-3); border-radius: 10px; }
.tabs button.on { color: var(--ink); background: var(--paper-2); }
.nav-brand { display: none; }

/* ---------- desktop (Mac) ---------- */
@media (min-width: 900px) {
  body.has-nav { padding-left: 220px; }
  .tabs {
    top: 0; right: auto; width: 220px; flex-direction: column; justify-content: flex-start; gap: 2px;
    border-top: 0; border-right: 1px solid var(--rule); padding: 28px 14px; background: var(--paper);
    backdrop-filter: none; -webkit-backdrop-filter: none;
  }
  .nav-brand { display: block; font: 400 26px/1 var(--serif); padding: 0 14px 22px; }
  .nav-brand small { display: block; font: 500 12px/1.4 var(--sans); color: var(--ink-3); margin-top: 6px; }
  .tabs button { flex: none; max-width: none; text-align: left; padding: 10px 14px; font-size: 14px; }
  .app { max-width: 1080px; padding: 36px 44px 64px; }
  .app[data-tab="why"], .app[data-tab="settings"] { max-width: 780px; }
  .top .brand { visibility: hidden; }
  .daynum { font-size: 104px; }
  .score { width: 104px; height: 104px; }
  .score-text b { font-size: 34px; }
  .ticks i { height: 26px; }
  .cols { columns: 2; column-gap: 24px; }
  .grid30 { grid-template-columns: repeat(10, minmax(0, 68px)); }
  .stats { grid-template-columns: repeat(3, minmax(0, 220px)); }
  .sheet {
    top: 8vh; bottom: auto; left: 50%; right: auto; transform: translateX(-50%); width: 560px;
    max-height: 84vh; border-radius: 20px; padding-bottom: 24px;
  }
  .sheet .grab { display: none; }
  .toast { bottom: 32px; }
}

/* ---------- forms / misc ---------- */
.card { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 16px; }
.card + .card { margin-top: 10px; }
.btn { border: 0; background: var(--ink); color: var(--paper); padding: 11px 18px; border-radius: 12px; font-weight: 600; }
.btn.ghost { background: var(--paper-2); color: var(--ink); }
.field { display: grid; gap: 6px; margin: 12px 0; }
.field input { padding: 11px 12px; border-radius: 10px; border: 1px solid var(--rule); background: var(--paper); font-size: 16px; }
.center { min-height: 70vh; display: grid; align-content: center; }
.toast {
  position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom) + 78px); transform: translateX(-50%);
  background: var(--ink); color: var(--paper); padding: 9px 16px; border-radius: 999px; font-size: 13px; z-index: 30;
}
code { font-size: 12px; background: var(--paper-2); padding: 1px 5px; border-radius: 5px; word-break: break-all; }