:root {
  --bg: #eef1f4;
  --surface: #ffffff;
  --ink: #12202b;
  --muted: #5a6b79;
  --line: #d3dae1;
  --accent: #2149e6;
  --accent-ink: #ffffff;
  --danger: #b42318;
  --ok-bg: #e3f4ea;
  --ok-ink: #14532d;
  --err-bg: #fde8e6;
  --err-ink: #8a1c12;
  --radius: 14px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1620;
    --surface: #17222e;
    --ink: #e8edf2;
    --muted: #9aabb9;
    --line: #2a3947;
    --accent: #7a96ff;
    --accent-ink: #0b1220;
    --danger: #ff8a7d;
    --ok-bg: #12301f;
    --ok-ink: #a9e4bf;
    --err-bg: #3a1815;
    --err-ink: #ffb4ab;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-top: env(safe-area-inset-top, 0px);
}

main {
  max-width: 34rem;
  margin: 0 auto;
  padding: 1.25rem 1rem calc(6rem + env(safe-area-inset-bottom, 0px));
}

h1 { font-size: 1.9rem; line-height: 1.15; margin: 0.25rem 0 1rem; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.5rem; font-weight: 700; }
h3 { font-size: 1rem; margin: 1.25rem 0 0.5rem; font-weight: 700; }

a { color: var(--accent); }
small { color: var(--muted); }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.back { margin: 0; font-size: 0.95rem; }
.hint { color: var(--muted); font-size: 0.9rem; margin-top: 1rem; }
.empty { color: var(--muted); }

/* Flash messages */
.flash { margin: 0 0 1rem; padding: 0.75rem 1rem; border-radius: var(--radius); font-weight: 600; }
.flash.ok { background: var(--ok-bg); color: var(--ok-ink); }
.flash.error { background: var(--err-bg); color: var(--err-ink); }

/* Home: one big row per activity */
.lanes { display: grid; gap: 0.6rem; }
.lane {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  min-height: 4.25rem; padding: 0.75rem 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--ink); text-decoration: none;
}
.lane:active { background: var(--line); }
.lane-name { font-size: 1.3rem; font-weight: 700; }
.lane-last { display: flex; flex-direction: column; align-items: flex-end; font-variant-numeric: tabular-nums; text-align: right; }

/* Entry lists */
.entries { display: grid; gap: 0; border-top: 1px solid var(--line); }
.entry {
  display: grid; grid-template-columns: 3.4rem 1fr; gap: 0.5rem;
  padding: 0.7rem 0; border-bottom: 1px solid var(--line);
  color: var(--ink); text-decoration: none;
}
.entry-time { color: var(--muted); font-variant-numeric: tabular-nums; }
.entry-main { display: flex; flex-direction: column; }
.entry-name { font-weight: 700; }
.entry-sum { font-variant-numeric: tabular-nums; }
.entry-note { color: var(--muted); font-size: 0.9rem; }

/* Logging form: label left, big number right, unit after */
.stack { display: grid; gap: 0.75rem; }
.measure {
  display: grid; grid-template-columns: 1fr minmax(7rem, 9rem) 3.5rem; align-items: center; gap: 0.75rem;
  padding: 0.5rem 0.75rem 0.5rem 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.m-name { font-weight: 700; font-size: 1.1rem; }
.m-unit { color: var(--muted); }
.measure input {
  width: 100%; min-height: 3.5rem; padding: 0 0.75rem;
  font: inherit; font-size: 1.75rem; font-weight: 800; text-align: right;
  font-variant-numeric: tabular-nums;
  background: var(--bg); color: var(--ink); border: 2px solid transparent; border-radius: 10px;
}
.measure input:focus { border-color: var(--accent); outline: none; }

details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem 1rem; }
summary { cursor: pointer; font-weight: 600; min-height: 1.75rem; }
details[open] summary { margin-bottom: 0.75rem; }
details .field + .field { margin-top: 0.75rem; }

.field { display: grid; gap: 0.3rem; font-weight: 600; }
.field input, .field select {
  width: 100%; min-height: 3rem; padding: 0 0.75rem;
  font: inherit; font-weight: 400;
  background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 10px;
}
details .field input { background: var(--bg); }
.field small { font-weight: 400; }

/* Buttons */
button {
  font: inherit; font-weight: 700; min-height: 3rem; padding: 0 1.1rem;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface); color: var(--ink); cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.secondary { background: var(--surface); }
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
button.small { min-height: 2.5rem; padding: 0 0.8rem; }
button.icon { min-width: 2.75rem; padding: 0; }

.actions { display: grid; gap: 0.6rem; margin-top: 0.5rem; }
.actions .primary { min-height: 3.75rem; font-size: 1.25rem; }
.actions form { display: contents; }

.danger-zone { margin-top: 2.5rem; }

/* Management screens */
.manage-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.manage-list li { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; padding: 0.4rem 0; border-bottom: 1px solid var(--line); }
.manage-list .archived .manage-name { color: var(--muted); }
.manage-name { flex: 1; font-weight: 700; font-size: 1.1rem; padding: 0.5rem 0; text-decoration: none; color: var(--ink); }
.movers, .row-actions { display: flex; gap: 0.4rem; }

.inline-form { display: flex; gap: 0.5rem; align-items: end; flex-wrap: wrap; }
.inline-form .grow { flex: 1 1 10rem; }
.inline-form .narrow { flex: 0 1 6rem; }

.field-row { padding: 0.75rem 0; border-bottom: 1px solid var(--line); display: grid; gap: 0.5rem; }
.row-actions { justify-content: flex-end; }

.filter { margin-bottom: 0.5rem; }
.pager { display: flex; gap: 1.5rem; margin-top: 1rem; font-weight: 600; }

/* Bottom tab bar */
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5;
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--surface); border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.tabs a {
  display: grid; place-items: center; min-height: 3.5rem;
  color: var(--muted); text-decoration: none; font-weight: 600;
}
.tabs a[aria-current="page"] { color: var(--accent); box-shadow: inset 0 3px 0 var(--accent); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}