:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --danger: #d03b3b;
  --series-mood: #2a78d6;      /* categorical slot 1 (blue) */
  --series-condition: #eb6834; /* categorical slot 2 (orange) */
  --series-kcal: #1baf7a;      /* categorical slot 3 (aqua) */
  --seq-1: #cde2fb; --seq-2: #9ec5f4; --seq-3: #6da7ec; --seq-4: #3987e5; --seq-5: #256abf;
  --seq-ink-1: #0b0b0b; --seq-ink-2: #0b0b0b; --seq-ink-3: #ffffff; --seq-ink-4: #ffffff; --seq-ink-5: #ffffff;
  --radius: 12px;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --series-mood: #3987e5;
    --series-condition: #d95926;
    --series-kcal: #199e70;
    --seq-1: #104281; --seq-2: #1c5cab; --seq-3: #2a78d6; --seq-4: #5598e7; --seq-5: #86b6ef;
    --seq-ink-1: #ffffff; --seq-ink-2: #ffffff; --seq-ink-3: #ffffff; --seq-ink-4: #0b0b0b; --seq-ink-5: #0b0b0b;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --series-mood: #3987e5;
  --series-condition: #d95926;
  --series-kcal: #199e70;
  --seq-1: #104281; --seq-2: #1c5cab; --seq-3: #2a78d6; --seq-4: #5598e7; --seq-5: #86b6ef;
  --seq-ink-1: #ffffff; --seq-ink-2: #ffffff; --seq-ink-3: #ffffff; --seq-ink-4: #0b0b0b; --seq-ink-5: #0b0b0b;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15px;
}
button, input { font: inherit; color: inherit; }
a { color: var(--accent); }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { font-size: 17px; margin: 0; white-space: nowrap; }
.tabs { display: flex; gap: 4px; margin-left: auto; }
.tabs a {
  padding: 6px 12px; border-radius: 999px;
  color: var(--ink-2); text-decoration: none; font-size: 14px;
}
.tabs a[aria-current="page"] { background: var(--surface); color: var(--ink); box-shadow: 0 0 0 1px var(--border); font-weight: 600; }

main { max-width: 760px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}
.card h2 { font-size: 15px; margin: 0 0 8px; }
.muted { color: var(--muted); }
.center { text-align: center; }

button {
  border: 0; border-radius: 8px; padding: 8px 14px;
  background: var(--accent); color: #fff; cursor: pointer; font-weight: 600;
}
button.ghost { background: transparent; color: var(--ink-2); box-shadow: inset 0 0 0 1px var(--border); font-weight: 500; }
button:disabled { opacity: .5; cursor: default; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* login */
.login { max-width: 420px; margin: 8vh auto 0; width: 100%; }
.login form { display: grid; gap: 8px; margin-top: 12px; }
.login input { padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--page); }
.status { min-height: 1.6em; margin: 8px 0 0; color: var(--ink-2); }
.status.error { color: var(--danger); }

/* day view */
.datebar { display: flex; align-items: center; gap: 8px; }
.datebar h2 { margin: 0 auto; font-size: 17px; }
.datebar button { min-width: 40px; }
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; }
.tile .label { font-size: 12px; color: var(--muted); }
.tile .value { font-size: 20px; font-weight: 600; }
.tile .value small { font-size: 12px; color: var(--ink-2); font-weight: 400; }
.summary { white-space: pre-wrap; margin: 0; color: var(--ink); }

.timeline { list-style: none; margin: 0; padding: 0; display: grid; }
.timeline li { display: grid; grid-template-columns: 28px 48px 1fr; gap: 8px; padding: 10px 0; border-top: 1px solid var(--border); align-items: start; }
.timeline li:first-child { border-top: 0; }
.timeline .icon { font-size: 18px; line-height: 1.4; }
.timeline time { color: var(--ink-2); font-variant-numeric: tabular-nums; font-size: 14px; line-height: 1.7; }
.timeline .body { min-width: 0; }
.timeline .meta { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.chip { font-size: 12px; color: var(--ink-2); background: var(--page); border: 1px solid var(--border); border-radius: 999px; padding: 1px 8px; }
.timeline img { display: block; margin-top: 8px; max-width: min(240px, 100%); border-radius: 8px; border: 1px solid var(--border); }
.approx { color: var(--muted); font-size: 12px; }

/* charts */
.chart-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.chart-head h2 { margin: 0; }
.legend { display: flex; gap: 12px; font-size: 13px; color: var(--ink-2); margin-left: auto; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; overflow: visible; touch-action: pan-y; }
.chart text { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .base { stroke: var(--axis); stroke-width: 1; }
.chart .cross { stroke: var(--axis); stroke-width: 1; }
.chart .direct { fill: var(--ink-2); font-size: 12px; }
.tooltip {
  position: absolute; pointer-events: none; z-index: 5;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
  padding: 6px 10px; font-size: 12px; white-space: nowrap;
}
.tooltip .row { display: flex; align-items: center; gap: 6px; }
.tooltip i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.seg { display: inline-flex; gap: 2px; background: var(--page); border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.seg button { background: transparent; color: var(--ink-2); padding: 4px 10px; font-weight: 500; border-radius: 6px; }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 0 0 1px var(--border); }
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.toolbar .ghost { margin-left: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
table.data th, table.data td { padding: 6px 8px; border-top: 1px solid var(--border); text-align: right; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th { color: var(--muted); font-weight: 500; border-top: 0; }
.table-wrap { overflow-x: auto; }

/* calendar */
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; }
.cal .dow { text-align: center; font-size: 12px; color: var(--muted); }
.cal a {
  aspect-ratio: 1; border-radius: 8px; text-decoration: none;
  display: grid; place-items: center; align-content: center;
  background: var(--page); color: var(--ink); border: 1px solid var(--border);
  font-variant-numeric: tabular-nums; font-size: 14px; line-height: 1.2;
}
.cal a small { font-size: 10px; color: inherit; opacity: .8; }
.cal a.l1 { background: var(--seq-1); color: var(--seq-ink-1); }
.cal a.l2 { background: var(--seq-2); color: var(--seq-ink-2); }
.cal a.l3 { background: var(--seq-3); color: var(--seq-ink-3); }
.cal a.l4 { background: var(--seq-4); color: var(--seq-ink-4); }
.cal a.l5 { background: var(--seq-5); color: var(--seq-ink-5); }
.cal a.today { box-shadow: inset 0 0 0 2px var(--ink); }
.cal .blank { visibility: hidden; }
.scale { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--muted); margin-top: 8px; }
.scale i { width: 16px; height: 12px; border-radius: 3px; display: inline-block; border: 1px solid var(--border); }

@media (max-width: 520px) {
  .brand { font-size: 15px; }
  .tabs a { padding: 6px 9px; }
  .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #logout { padding: 6px 8px; font-size: 12px; }
}