/* Fuel Tracker: mobile-first, follows the phone's light/dark setting. */

:root {
  color-scheme: light dark;
  --bg: #f4f4f6;
  --card: #ffffff;
  --text: #111113;
  --muted: #6b6b73;
  --line: #e2e2e7;
  --accent: #0a7cff;
  --accent-text: #ffffff;
  --danger: #d8372b;
  --track: #e6e6eb;
  --radius: 14px;
  --gutter: 16px;
  --tabbar-h: 56px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f2f2f7;
    --muted: #9a9aa3;
    --line: #2c2c2e;
    --accent: #0a84ff;
    --track: #2c2c2e;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}

[hidden] { display: none !important; }

h1, h2, h3 { margin: 0; }
h1 { font-size: 28px; font-weight: 700; }
h2 { font-size: 19px; font-weight: 600; }
h3 { font-size: 17px; font-weight: 600; }
p { margin: 0; }

.screen {
  padding: calc(12px + env(safe-area-inset-top)) var(--gutter) 24px;
  min-height: 100dvh;
}
.screen.app {
  padding-bottom: calc(var(--tabbar-h) + 24px + env(safe-area-inset-bottom));
}

.stack > * + * { margin-top: 12px; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px var(--gutter);
}

.muted { color: var(--muted); font-size: 15px; }
.center { text-align: center; }
.error { color: var(--danger); min-height: 1.3em; font-size: 15px; }

input, textarea, button, select { font: inherit; color: inherit; }

.field {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  outline: none;
  min-width: 0;
}
.field:focus { border-color: var(--accent); }
select.field { appearance: none; -webkit-appearance: none; }

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.5; }
.btn.secondary { background: var(--card); color: var(--accent); border: 1px solid var(--line); }
.btn.danger { background: transparent; color: var(--danger); border: 1px solid var(--line); }
.btn.small { width: auto; padding: 8px 14px; font-size: 15px; }

.icon-btn {
  width: 44px; height: 44px;
  border: 0; border-radius: 12px;
  background: var(--card);
  color: var(--accent);
  font-size: 28px; line-height: 1;
  cursor: pointer;
}
.icon-btn:disabled { color: var(--muted); opacity: 0.4; }

/* Lock screen */
.lock {
  display: flex; flex-direction: column; justify-content: center;
  max-width: 360px; margin: 0 auto; gap: 14px; text-align: center;
}
.lock input { font-size: 28px; letter-spacing: 0.4em; text-align: center; }

/* Today: day navigation */
.day-nav { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.day-label { flex: 1; text-align: center; }
.day-label h1 { font-size: 24px; }

/* Today: stats */
.stats { display: grid; gap: 10px; margin-bottom: 12px; }
.stat { display: grid; grid-template-columns: 70px 1fr auto; align-items: center; gap: 10px; }
.stat .name { font-weight: 600; }
.stat .val { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.stat .val small { color: var(--muted); font-size: 14px; }
.bar { height: 8px; border-radius: 4px; background: var(--track); overflow: hidden; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 4px; transition: width .2s; }
.bar > i.over { background: var(--danger); }

/* Today: slots */
.slot-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.slot-head .sum { color: var(--muted); font-size: 15px; font-variant-numeric: tabular-nums; }
.entry {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; padding: 10px 0; border: 0; border-top: 1px solid var(--line);
  background: none; text-align: left; cursor: pointer;
}
.entry .n { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entry .m { color: var(--muted); font-size: 14px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.entry .m b { color: var(--text); font-weight: 600; font-size: 16px; }
.slot-empty { color: var(--muted); font-size: 15px; padding: 6px 0; }
.slot-add { margin-top: 8px; }

/* Forms */
.row-field { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row-field > span { flex: 1; }
.row-field > .field { flex: 2; }
.row-field > .field.num { flex: 0 0 120px; text-align: right; }
.macro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.macro-grid label > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }

/* Tab bar */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: flex;
  height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--card);
  border-top: 1px solid var(--line);
}
.tabbar button {
  flex: 1; border: 0; background: none; color: var(--muted);
  font-size: 13px; font-weight: 600; cursor: pointer;
}
.tabbar button.active { color: var(--accent); }

/* Bottom sheet */
.sheet-backdrop {
  position: fixed; inset: 0; z-index: 10;
  background: rgba(0,0,0,.45);
  display: flex; align-items: flex-end;
}
.sheet {
  width: 100%; max-height: 92dvh; overflow-y: auto;
  background: var(--bg);
  border-radius: 18px 18px 0 0;
  padding: 14px var(--gutter) calc(16px + env(safe-area-inset-bottom));
}
.sheet-head { display: flex; align-items: center; justify-content: space-between; }
.sheet .field { background: var(--card); }
textarea.field { resize: none; line-height: 1.35; }

/* Segmented tab control inside the sheet */
.seg { display: flex; background: var(--track); border-radius: 10px; padding: 3px; }
.seg button {
  flex: 1; border: 0; border-radius: 8px; padding: 8px 0;
  background: none; color: var(--muted); font-size: 15px; font-weight: 600; cursor: pointer;
}
.seg button.active { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.15); }
.seg button:disabled { opacity: 0.4; cursor: default; }

/* Review rows */
.review-row { background: var(--card); border-radius: 12px; padding: 10px 12px; }
.review-row .top { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.review-row .top input { flex: 1; }
.review-row .qty { color: var(--muted); font-size: 13px; margin: -4px 0 8px; }
.review-row .nums { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.review-row .nums label > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.review-row .nums .field { padding: 8px 6px; text-align: center; }
.review-row .remove { width: 36px; height: 36px; font-size: 22px; flex: 0 0 auto; color: var(--danger); }
.review-total { font-variant-numeric: tabular-nums; }
.review-total b { color: var(--text); }
.btn.busy { opacity: 0.6; }

/* Saved lists */
.saved-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; padding: 10px 0; border: 0; border-top: 1px solid var(--line);
  background: none; text-align: left; cursor: pointer; color: inherit;
}
.saved-row:first-child { border-top: 0; }
.saved-row .n { flex: 1; min-width: 0; }
.saved-row .n small { display: block; color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.saved-row .m { color: var(--muted); font-size: 14px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.saved-row .m b { color: var(--text); font-weight: 600; font-size: 16px; }
.saved-group { font-size: 13px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; margin: 4px 0 2px; }
.check-row { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.check-row input { width: 20px; height: 20px; accent-color: var(--accent); }
.slot-head .link { border: 0; background: none; color: var(--accent); font-size: 14px; font-weight: 600; cursor: pointer; padding: 4px 0; }

/* Gym */
.field-label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.days { display: flex; gap: 6px; }
.days label { flex: 1; }
.days input { position: absolute; opacity: 0; width: 0; height: 0; }
.days span {
  display: block; text-align: center; padding: 9px 0; border-radius: 10px; font-size: 14px; font-weight: 600;
  background: var(--track); color: var(--muted); cursor: pointer;
}
.days input:checked + span { background: var(--accent); color: var(--accent-text); }
.row-btns { display: flex; gap: 10px; }
.row-btns .btn { flex: 1; }
.session {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; padding: 14px var(--gutter); border: 0; border-radius: var(--radius);
  background: var(--card); text-align: left; cursor: pointer; color: inherit;
}
.session .d { flex: 0 0 56px; text-align: center; }
.session .d b { display: block; font-size: 17px; }
.session .d small { color: var(--muted); font-size: 12px; }
.session .t { flex: 1; min-width: 0; }
.session .t b { display: block; }
.session .t small { color: var(--muted); font-size: 13px; }
.session .s { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; background: var(--track); color: var(--muted); white-space: nowrap; }
.session.done .s { background: rgba(46,158,91,.15); color: #2e9e5b; }
.session.skipped .s { color: var(--danger); }
.session.today { outline: 2px solid var(--accent); }
.ex-block { padding: 10px var(--gutter); }
.ex-block b { display: block; margin-bottom: 2px; }
.ex { background: var(--card); border-radius: 12px; padding: 10px var(--gutter); }
.ex .head { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.ex .head b { flex: 1; }
.ex .head span { color: var(--muted); font-size: 14px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.ex .note { color: var(--muted); font-size: 13px; margin: 2px 0 8px; }
.ex .log { display: grid; grid-template-columns: 110px 1fr; gap: 8px; }
.ex .log label > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.ex .log .field { padding: 8px 10px; }

/* Weight */
.weight-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; text-align: center; }
.weight-stats .k { font-size: 13px; color: var(--muted); }
.weight-stats .v { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.weight-stats .v small { font-size: 13px; font-weight: 500; color: var(--muted); }
.weight-stats .v.down { color: #2e9e5b; }
.weight-stats .v.up { color: var(--danger); }
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .raw { fill: var(--muted); }
.chart .rawline { fill: none; stroke: var(--muted); stroke-width: 1; opacity: .5; }
.chart .avg { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart text { fill: var(--muted); font-size: 11px; font-family: inherit; }
.chart .empty { fill: var(--muted); font-size: 14px; text-anchor: middle; }
.weight-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; padding: 10px 0; border: 0; border-top: 1px solid var(--line);
  background: none; text-align: left; cursor: pointer; color: inherit;
}
.weight-row:first-child { border-top: 0; }
.weight-row .d { color: var(--muted); }
.weight-row .kg { font-weight: 600; font-variant-numeric: tabular-nums; }
.weight-row.confirm .kg { color: var(--danger); font-weight: 500; }

/* Photo and amount panes */
.photo-preview { display: block; width: 100%; max-height: 260px; object-fit: contain; border-radius: 12px; background: var(--card); }
.amount-card { padding: 12px var(--gutter); }
.amount-product { font-weight: 600; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pill { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--track); color: var(--muted); }
.pill.low { color: var(--danger); }
.amount-input { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.amount-input .field.num { flex: 0 0 110px; }
.amount-input > span { min-width: 2.5em; }