/* Loaf Calc — mobile-first, warm-neutral, light/dark via tokens. */

:root {
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px;

  --bg: #FAF6F0;
  --surface: #FFFFFF;
  --surface-2: #F1EAE1;
  --text: #2A2420;
  --text-muted: #7A6F63;
  --border: #E4DACC;
  --accent: #B45A1E;
  --accent-contrast: #FFFFFF;
  --success: #3E7D4E;
  --card-shadow: 0 1px 3px rgb(0 0 0 / .08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171310;
    --surface: #221D18;
    --surface-2: #2E2822;
    --text: #EDE6DD;
    --text-muted: #9C9084;
    --border: #3A332C;
    --accent: #E8964A;
    --accent-contrast: #20160C;
    --success: #7CBF8C;
    --card-shadow: none;
  }
}
:root[data-theme="dark"] {
  --bg: #171310;
  --surface: #221D18;
  --surface-2: #2E2822;
  --text: #EDE6DD;
  --text-muted: #9C9084;
  --border: #3A332C;
  --accent: #E8964A;
  --accent-contrast: #20160C;
  --success: #7CBF8C;
  --card-shadow: none;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Author display rules (e.g. .save-form { display: flex }) would otherwise
   defeat the UA's [hidden] { display: none } and break every hidden toggle. */
[hidden] { display: none !important; }

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
  min-height: 100dvh;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- Header ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  height: 48px; padding: 0 var(--s4);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 1.25rem; font-weight: 700; }
.topbar-actions { display: flex; gap: var(--s2); }
.icon-btn {
  min-width: 44px; min-height: 44px;
  border-radius: 10px; font-size: 1.0625rem; font-weight: 600;
}
.icon-btn:active { background: var(--surface-2); }

/* ---------- Sticky summary bar ---------- */
.sticky-bar {
  /* fixed, not sticky-in-flow: toggling it must not shift the layout the
     IntersectionObserver is watching, or it feedback-loops */
  position: fixed; top: 48px; left: 0; right: 0; z-index: 19;
  padding: var(--s2) var(--s4);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem; font-weight: 600;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  white-space: nowrap; overflow-x: auto;
  scrollbar-width: none;
}
.sticky-bar::-webkit-scrollbar { display: none; }

/* ---------- Layout ---------- */
main {
  max-width: 960px; margin: 0 auto;
  padding: var(--s4) var(--s4) var(--s7);
  display: grid; gap: var(--s5);
}
@media (min-width: 820px) {
  main {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  main > section:nth-of-type(4) { grid-column: 2; grid-row: 1 / span 3; position: sticky; top: 64px; }
  main > section:nth-of-type(1) { grid-column: 1; }
  main > section:nth-of-type(2) { grid-column: 1; }
  main > section:nth-of-type(3) { grid-column: 1; }
  main > section:nth-of-type(5) { grid-column: 1 / -1; }
}

.section-label {
  font-size: 0.8125rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: var(--s3);
}
.section-label small { font-weight: 500; text-transform: none; letter-spacing: 0; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s3); margin-bottom: var(--s3); flex-wrap: wrap;
}
.section-head .section-label { margin-bottom: 0; }

/* ---------- Segmented control (g/% toggle) ---------- */
.segmented {
  display: flex;
  background: var(--surface-2);
  border-radius: 12px; padding: 3px;
}
.segment {
  flex: 1; min-height: 34px; min-width: 44px; padding: 0 var(--s3);
  border-radius: 9px; font-size: 1rem; font-weight: 500;
  color: var(--text-muted);
}
.segment[aria-pressed="true"] {
  background: var(--surface);
  color: var(--text); font-weight: 600;
  box-shadow: var(--card-shadow);
}

/* ---------- Chips ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: var(--s2); margin-bottom: var(--s4); }
.chip-row-tight { margin-bottom: 0; }
.chip {
  min-height: 40px; padding: 0 var(--s3);
  border: 1px solid var(--border); border-radius: 20px;
  background: var(--surface);
  font-size: 0.875rem; font-weight: 500;
}
.chip[aria-pressed="true"] {
  background: var(--accent); color: var(--accent-contrast);
  border-color: var(--accent); font-weight: 600;
}

/* ---------- Fields ---------- */
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); }
.field { display: block; }
.field-label { display: block; font-size: 0.875rem; color: var(--text-muted); margin-bottom: var(--s1); }
.field-input {
  display: flex; align-items: center;
  background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 0 var(--s3); height: 56px;
}
.field-input input {
  flex: 1; width: 100%; min-width: 0;
  border: none; background: none; color: inherit;
  font-size: 1.375rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.field-input input:focus { outline: none; }
.field-input .unit { color: var(--text-muted); font-size: 1rem; }
.field-note { display: block; font-size: 0.8125rem; color: var(--text-muted); margin-top: var(--s1); min-height: 1.2em; }

/* ---------- Mini steppers ---------- */
.section-hint {
  font-size: 0.875rem; color: var(--text-muted);
  margin-bottom: var(--s3);
}

.starter-flour-row {
  display: flex; align-items: center; gap: var(--s3);
  margin-top: var(--s4); flex-wrap: wrap;
}

.mini-stepper { display: flex; align-items: center; gap: var(--s2); margin-top: var(--s4); }
.mini-label { font-size: 0.875rem; color: var(--text-muted); }
.stepper-group { display: flex; align-items: center; gap: var(--s1); }
.step-btn {
  min-width: 44px; min-height: 44px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface);
  font-size: 1.25rem; font-weight: 600;
}
.step-btn:active { background: var(--surface-2); }
.step-btn.ghost { border-style: dashed; color: var(--text-muted); }
.stepper-value {
  min-width: 3.2em; text-align: center;
  font-size: 1.125rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ---------- Blend rows ---------- */
.blend-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "name pct steppers" "slider slider slider";
  align-items: center; gap: var(--s1) var(--s3);
  padding: var(--s3) 0;
  border-bottom: 1px solid var(--border);
}
.blend-row:last-child { border-bottom: none; }
.blend-name { grid-area: name; display: flex; align-items: center; gap: var(--s2); font-size: 1.0625rem; }
.lock-btn {
  min-width: 44px; min-height: 44px; margin-left: calc(-1 * var(--s2));
  font-size: 1rem; color: var(--text-muted); border-radius: 10px;
}
/* color emoji ignore CSS color, so the locked state needs its own chrome */
.lock-btn[aria-pressed="true"] {
  background: var(--surface-2);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.blend-pct {
  grid-area: pct; text-align: right;
  font-size: 1.375rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.blend-steppers { grid-area: steppers; display: flex; gap: var(--s1); }
.blend-slider { grid-area: slider; width: 100%; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 44px; background: none;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent) var(--fill, 0%), var(--surface-2) var(--fill, 0%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px; height: 28px; margin-top: -11px;
  border-radius: 50%; background: var(--surface);
  border: 2px solid var(--accent);
  box-shadow: var(--card-shadow);
}
input[type="range"]::-moz-range-track {
  height: 6px; border-radius: 3px; background: var(--surface-2);
}
input[type="range"]::-moz-range-progress { height: 6px; border-radius: 3px; background: var(--accent); }
input[type="range"]::-moz-range-thumb {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent);
}

/* ---------- Hydration ---------- */
.hydration-row { display: flex; align-items: center; justify-content: space-between; }
.big-value {
  font-size: 1.75rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.big-value.adjusted { color: var(--accent); }

/* ---------- Recipe card ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
}
.recipe-rows { list-style: none; }
.recipe-row {
  display: flex; align-items: center; gap: var(--s3);
  min-height: 56px; padding: 0 var(--s4);
  border-bottom: 1px solid var(--border);
}
.recipe-row .ing-name { flex: 1; font-size: 1.0625rem; }
.recipe-row .ing-amount {
  font-size: 1.75rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.recipe-row .ing-amount .unit { font-size: 1rem; font-weight: 500; color: var(--text-muted); }
.recipe-total {
  padding: var(--s3) var(--s4);
  font-size: 0.875rem; color: var(--text-muted);
  background: var(--surface-2);
}
.warnings { margin-top: var(--s2); }
.warnings p { font-size: 0.875rem; color: var(--accent); padding: var(--s1) 0; }

.link-btn {
  color: var(--accent); font-size: 0.875rem; font-weight: 600;
  min-height: 44px; padding: 0 var(--s2);
}
.suggest-row {
  display: flex; align-items: center; justify-content: flex-end;
  gap: var(--s2); margin-top: var(--s2); flex-wrap: wrap;
}
.suggest-row .field-note { margin-top: 0; }
.chip-accent {
  border-color: var(--accent); color: var(--accent); font-weight: 600;
}

/* ---------- Saved recipes ---------- */
.secondary-btn {
  min-height: 44px; padding: 0 var(--s4);
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface); font-weight: 600;
}
.save-form { display: flex; gap: var(--s2); align-items: center; flex-wrap: wrap; }
.save-form input {
  flex: 1; min-width: 160px; height: 44px;
  padding: 0 var(--s3);
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface); color: inherit;
  font-size: 1rem;
}
.saved-list { list-style: none; margin-top: var(--s3); }
.saved-row {
  display: flex; align-items: center; gap: var(--s2);
  min-height: 60px; padding: var(--s2) 0;
  border-bottom: 1px solid var(--border);
}
.saved-main { flex: 1; text-align: left; min-height: 44px; padding: var(--s1) 0; }
.saved-name { font-size: 1.0625rem; font-weight: 600; display: block; }
.saved-sub { font-size: 0.875rem; color: var(--text-muted); }
.saved-del { min-width: 44px; min-height: 44px; color: var(--text-muted); font-size: 1.125rem; border-radius: 10px; }
.saved-confirm { display: flex; align-items: center; gap: var(--s2); flex: 1; justify-content: flex-end; font-size: 0.875rem; }
.danger-btn {
  min-height: 40px; padding: 0 var(--s3);
  border-radius: 10px; background: #B3403A; color: #fff; font-weight: 600;
}

/* ---------- Explainer ---------- */
.explainer { margin-top: var(--s3); }
.explainer summary {
  font-size: 0.875rem; font-weight: 600; color: var(--accent);
  cursor: pointer; min-height: 44px; display: flex; align-items: center;
  -webkit-user-select: none; user-select: none;
}
.explainer p {
  font-size: 0.875rem; color: var(--text-muted);
  margin-bottom: var(--s3); max-width: 60ch;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--s5) + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: var(--s3) var(--s4); border-radius: 12px;
  font-size: 0.9375rem; font-weight: 500;
  z-index: 30; max-width: calc(100vw - 32px);
  animation: toast-in 0.2s ease-out;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } }

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