/* ==========================================================================
   Sourdough Bake Archive — structure.
   Carries no colour and no typeface. Both themes layer on top of this, so
   any layout fix lands in both at once.

   Sizing is fluid rather than stepped: type and spacing interpolate with the
   viewport via clamp(), so there are no jarring jumps at breakpoints. Every
   clamp keeps a rem term in the middle so browser zoom and user font-size
   settings still work — a pure-vw scale would break both.
   ========================================================================== */

:root {
  /* Type scale */
  --t-xs:  clamp(0.66rem, 0.63rem + 0.13vw, 0.74rem);
  --t-sm:  clamp(0.78rem, 0.75rem + 0.16vw, 0.88rem);
  --t-base:clamp(0.97rem, 0.93rem + 0.22vw, 1.06rem);
  --t-md:  clamp(1.06rem, 1.00rem + 0.30vw, 1.22rem);
  --t-lg:  clamp(1.30rem, 1.15rem + 0.75vw, 1.62rem);
  --t-xl:  clamp(1.85rem, 1.45rem + 2.00vw, 3.40rem);

  /* Spacing scale */
  --sp-2xs: clamp(0.25rem, 0.22rem + 0.15vw, 0.4rem);
  --sp-xs:  clamp(0.4rem,  0.33rem + 0.35vw, 0.7rem);
  --sp-sm:  clamp(0.7rem,  0.58rem + 0.6vw,  1.1rem);
  --sp-md:  clamp(1.1rem,  0.88rem + 1.1vw,  1.85rem);
  --sp-lg:  clamp(1.7rem,  1.25rem + 2.2vw,  3rem);
  --sp-xl:  clamp(2.4rem,  1.7rem + 3.4vw,   4.4rem);

  /* Page gutter — tight on a phone, generous on a desktop */
  --gutter: clamp(0.95rem, 0.45rem + 2.6vw, 3rem);

  --rail-w: clamp(11rem, 9rem + 6vw, 15rem);
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-size: var(--t-base);
  line-height: 1.6;
  overflow-wrap: break-word;
}

/* Nothing may push the page sideways. */
img, svg, table { max-width: 100%; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.7rem 1.1rem;
  z-index: 100;
}
.skip:focus { left: 0; }

/* --- Shell: narrow rail + wide document ---------------------------------- */

.shell {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  gap: var(--sp-lg);
  max-width: 78rem;
  margin: 0 auto;
  padding: var(--gutter);
  align-items: start;
}

.rail {
  position: sticky;
  top: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  font-size: var(--t-sm);
}

.rail__id { margin: 0; font-size: clamp(1.6rem, 1.1rem + 2vw, 2.6rem); line-height: 1; }
.rail__archive, .rail__conf, .rail__switch { margin: 0; }
.rail__nav ul { margin: 0; padding: 0; list-style: none; }
.rail__nav li + li { margin-top: var(--sp-2xs); }
/* Comfortable tap targets on touch screens. */
.rail__nav a { display: inline-block; padding: 0.3rem 0; min-height: 1.9rem; }

.marker {
  display: inline-block;
  width: 0.62rem;
  height: 0.62rem;
  margin-right: 0.45rem;
}

.doc { min-width: 0; }

/* --- Header -------------------------------------------------------------- */

.head { margin-bottom: var(--sp-lg); }
.head__kicker { margin: 0 0 var(--sp-xs); font-size: var(--t-xs); }
.head h1 { margin: 0 0 var(--sp-md); font-size: var(--t-xl); line-height: 1.1; }

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 9rem), 1fr));
  gap: var(--sp-sm) var(--sp-md);
  margin: 0;
}
.meta > div { min-width: 0; }
.meta dt { font-size: var(--t-xs); letter-spacing: 0.09em; text-transform: uppercase; }
.meta dd { margin: 0.15rem 0 0; }

/* --- Panels -------------------------------------------------------------- */

.panel { margin: 0 0 var(--sp-xl); }
.panel > h2 {
  margin: 0 0 var(--sp-sm);
  font-size: var(--t-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* --- Status chips: shape carries meaning, not just colour ---------------- */

.chip {
  display: inline-block;
  align-self: flex-start;
  padding: 0.24em 0.75em;
  font-size: var(--t-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid;
}
.chip--outlined { background: transparent; }
.chip--dashed   { background: transparent; border-style: dashed; }
.chip--hatched  { border-style: double; border-width: 4px; }

/* --- Key figures --------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 7.5rem), 1fr));
  gap: 1px;
  margin: 0;
}
.stat { padding: var(--sp-sm) var(--sp-xs); }
.stat dt { font-size: var(--t-xs); letter-spacing: 0.09em; text-transform: uppercase; }
.stat dd { margin: var(--sp-2xs) 0 0; font-size: var(--t-lg); line-height: 1.1; }

/* --- Formula table ------------------------------------------------------- */

.formula {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
.formula caption {
  text-align: left;
  margin-bottom: var(--sp-sm);
  font-size: var(--t-sm);
  line-height: 1.55;
}
.formula th, .formula td {
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
.formula thead th {
  font-size: var(--t-xs);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  white-space: nowrap;
}
.formula .num { text-align: right; white-space: nowrap; }
.formula .note { font-size: var(--t-sm); }
.formula tfoot th, .formula tfoot td { font-weight: 700; }

.num { font-variant-numeric: tabular-nums; }

/* --- Hydration gauge ----------------------------------------------------- */

.gauge { display: grid; gap: var(--sp-sm); }
.gauge__row {
  display: grid;
  grid-template-columns: minmax(6rem, 8rem) minmax(0, 1fr) 3.6rem;
  align-items: center;
  gap: var(--sp-xs) var(--sp-sm);
}
.gauge__label { font-size: var(--t-sm); }
.gauge__track { height: 0.85rem; display: block; }
.gauge__fill { display: block; height: 100%; }
.gauge__val { font-variant-numeric: tabular-nums; text-align: right; }
.gauge__desc {
  grid-column: 1 / -1;
  font-size: var(--t-xs);
  margin-top: -0.3rem;
}

/* --- Flags & notices ----------------------------------------------------- */

.flags { padding: var(--sp-md); margin: 0 0 var(--sp-lg); }
.flags h2 { margin: 0 0 var(--sp-xs); font-size: var(--t-sm); letter-spacing: 0.12em; text-transform: uppercase; }
.flags ul { margin: 0; padding-left: 1.1rem; }
.flags li + li { margin-top: var(--sp-xs); }

.alert { padding: var(--sp-sm); margin: var(--sp-md) 0 0; }
.hint  { font-size: var(--t-sm); margin: var(--sp-sm) 0 0; }
.empty { font-style: italic; }
.nr { font-style: italic; font-size: 0.92em; white-space: nowrap; }

/* --- Scale island -------------------------------------------------------- */

.scale__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--sp-sm) var(--sp-md);
  margin-bottom: var(--sp-md);
}
.scale__controls label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: var(--t-xs);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.scale__controls input {
  width: 100%;
  min-width: 0;
  max-width: 9rem;
  /* 16px minimum stops iOS Safari zooming the page on focus. */
  font: inherit;
  font-size: max(1rem, var(--t-sm));
  padding: 0.5rem 0.6rem;
}
.scale__controls button {
  padding: 0.6rem 1.1rem;
  min-height: 2.75rem;
  font: inherit;
  cursor: pointer;
}
.unit { font-size: var(--t-sm); }

.scale__list { margin: 0; padding: 0; list-style: none; }
.scale__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 1.2rem;
  gap: var(--sp-xs);
  padding: 0.4rem 0;
}
.scale__g { text-align: right; font-variant-numeric: tabular-nums; }
.scale__u { font-size: var(--t-sm); }
.scale__total { margin: var(--sp-sm) 0 0; font-weight: 700; }

/* --- Plot ---------------------------------------------------------------- */

.plot { margin: 0; }
.plot svg { width: 100%; max-width: 32rem; height: auto; display: block; }
.plot figcaption { margin-top: var(--sp-xs); font-size: var(--t-sm); max-width: 34rem; }
.dot--dashed  { stroke-dasharray: 2 2; }
.dot--hatched { stroke-dasharray: 4 2; }

/* --- Tags ---------------------------------------------------------------- */

.tags { display: flex; flex-wrap: wrap; gap: var(--sp-xs); margin: 0; padding: 0; list-style: none; }
.tags li { padding: 0.2em 0.65em; font-size: var(--t-sm); }

/* --- Footer -------------------------------------------------------------- */

.foot { margin-top: var(--sp-xl); padding-top: var(--sp-md); font-size: var(--t-sm); }
.foot p { margin: 0 0 var(--sp-xs); }

/* ==========================================================================
   Narrow: rail becomes a header strip
   ========================================================================== */

@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: var(--sp-md); }
  .rail {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-xs) var(--sp-md);
    padding-bottom: var(--sp-sm);
  }
  .rail__archive { flex: 1 1 100%; }
  .rail__nav { flex: 1 1 100%; margin-top: 0; }
  .rail__nav ul { display: flex; flex-wrap: wrap; gap: 0 var(--sp-md); }
  .rail__nav li + li { margin-top: 0; }
}

/* ==========================================================================
   Phone: the formula table stops being a table and becomes a list.
   Four columns cannot stay readable at 360px, and a horizontal scrollbar
   hides the percentages — which are the whole point.
   ========================================================================== */

@media (max-width: 620px) {
  .formula, .formula tbody, .formula tfoot, .formula tr,
  .formula th, .formula td { display: block; width: 100%; }

  .formula thead { position: absolute; left: -9999px; }

  .formula tbody tr, .formula tfoot tr { padding: var(--sp-sm) 0; }

  .formula tbody th, .formula tfoot th {
    padding: 0 0 var(--sp-2xs);
    font-size: var(--t-md);
  }

  .formula td {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--sp-sm);
    padding: 0.15rem 0;
    text-align: right;
  }

  /* The stripped column header comes back as an inline label. */
  .formula td::before {
    content: attr(data-label);
    flex: 0 0 auto;
    font-size: var(--t-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.72;
  }

  /* An empty cell would otherwise render as a stray label. */
  .formula td:empty { display: none; }
  .formula td.note { text-align: left; }
  .formula td.note::before { display: none; }
  .formula td.note { font-style: italic; padding-top: var(--sp-2xs); }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .gauge__row { grid-template-columns: minmax(0, 1fr) 3.5rem; }
  .gauge__label { grid-column: 1 / -1; }
  .gauge__track { grid-column: 1 / 2; }

  .scale__controls { gap: var(--sp-sm); }
  .scale__controls label { flex: 1 1 8rem; }
  .scale__controls button { flex: 1 1 100%; }
}

@media (max-width: 380px) {
  .stats { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* --- Print: formula on one page, status legible in greyscale ------------- */

@media print {
  .rail__nav, .skip, .scale__controls, .rail__switch { display: none; }
  .shell { display: block; max-width: none; padding: 0; }
  .panel { break-inside: avoid; margin-bottom: 1.2rem; }
  .formula { break-inside: avoid; }
  .formula thead { position: static; }
  body { background: #fff; color: #000; }
  a { text-decoration: underline; }
}