/* ==========================================================================
   Snowglobe Suds — the whole visual hand.
   Clean-lab palette: cool wash background, deep teal for structure, oat for
   reference bands, warning orange for anything a soapmaker must not miss.
   Square corners, no shadows, no rounded pills, no bold body copy.
   ========================================================================== */

:root {
  --wash: #eaf4f4;
  --wash-deep: #dcecec;
  --ink: #143433;
  --teal: #1f6f6b;
  --teal-dark: #0f3f3c;
  --oat: #d9cbb3;
  --oat-line: #c8b795;
  --lye-caution: #e4572e;
  --lye-caution-dark: #b93f1d;
  --trace-stage: #6f8f5e;
  --cure-clock: #8a7a5c;
  --paper: #f7fbfa;
  --rule: #cfe2e1;
  --rule-strong: #9dc2c0;
  --muted: #4a6a68;
  --step: 1.5rem;
  --font: Inter, "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.62;
  font-variant-numeric: tabular-nums;
}

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--lye-caution); text-decoration: underline; text-underline-offset: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--teal-dark); color: #fff; padding: 8px 14px; z-index: 40;
}
.skip:focus { left: 0; }

h1, h2, h3 { font-weight: 500; line-height: 1.22; margin: 0 0 .5rem; }
h1 { font-size: 1.9rem; letter-spacing: -.01em; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; }

p { margin: 0 0 .9rem; }
img { max-width: 100%; height: auto; display: block; }

/* ---------------------------------------------------------------- caution */

.caution {
  margin: 0;
  background: var(--lye-caution);
  color: #fff;
  font-size: .8rem;
  letter-spacing: .01em;
  padding: 7px max(16px, calc((100% - 1080px) / 2));
  display: flex;
  gap: 10px;
  align-items: center;
}
.caution-tag {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  border: 1px solid rgba(255, 255, 255, .7);
  padding: 0 6px;
  flex: none;
}

/* --------------------------------------------------------------- masthead */

.masthead {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 14px max(16px, calc((100% - 1080px) / 2));
  background: var(--paper);
  border-bottom: 1px solid var(--rule-strong);
}
.wordmark { display: flex; align-items: center; gap: 10px; font-size: .95rem; letter-spacing: .04em; color: var(--teal-dark); }
.wordmark:hover { text-decoration: none; color: var(--teal-dark); }
.wordmark img { flex: none; }
.topnav { display: flex; gap: 0; margin-left: auto; }
.topnav a {
  padding: 6px 16px;
  font-size: .88rem;
  color: var(--ink);
  border-left: 1px solid var(--rule);
}
.topnav a:first-child { border-left: 0; }
.topnav a[aria-current="page"] { color: var(--teal-dark); background: var(--wash); }
.langswap {
  font-family: var(--mono);
  font-size: .78rem;
  border: 1px solid var(--rule-strong);
  padding: 4px 10px;
}

/* ------------------------------------------------------------- bench rail */

.rail {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px max(16px, calc((100% - 1080px) / 2));
  background: var(--wash-deep);
  border-bottom: 1px solid var(--rule-strong);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-wrap: wrap;
}
.rail-label { font-size: .74rem; letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.rail-steps { display: flex; list-style: none; margin: 0; padding: 0; gap: 0; }
.rail-step { position: relative; }
.rail-step a {
  display: flex; align-items: center; gap: 7px;
  padding: 5px 13px 5px 9px;
  font-size: .82rem;
  color: var(--muted);
  border-top: 2px solid transparent;
}
.rail-step a:hover { text-decoration: none; color: var(--teal-dark); }
.rail-num {
  font-family: var(--mono);
  font-size: .68rem;
  width: 17px; height: 17px;
  display: grid; place-items: center;
  border: 1px solid var(--rule-strong);
  color: var(--muted);
}
.rail-step.is-here a { color: var(--teal-dark); border-top-color: var(--lye-caution); }
.rail-step.is-here .rail-num { background: var(--teal); border-color: var(--teal); color: #fff; }
.rail-step.is-past .rail-num { background: var(--oat); border-color: var(--oat-line); color: var(--ink); }

/* ------------------------------------------------------------------ main */

main { display: block; }

.toolbench, .index-block, .sheet, .wrapup, .lost, .indexlead {
  max-width: 1080px;
  margin: 0 auto;
  padding: 26px 16px;
}

.tool-head h1 { margin-bottom: .3rem; }
.tool-head p { color: var(--muted); max-width: 62ch; }

/* ------------------------------------------------------------ calculator */

.calc {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 0;
  border: 1px solid var(--teal);
  background: var(--paper);
  margin-top: 18px;
}
.calc-form { padding: 16px; border-right: 1px solid var(--rule); }
.calc-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.calc-controls label { display: block; font-size: .74rem; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; }
.calc-controls input, .calc-controls select {
  width: 100%; margin-top: 5px; padding: 7px 9px;
  border: 1px solid var(--rule-strong); border-radius: 0;
  background: #fff; color: var(--ink); font: inherit; font-size: .92rem;
}
.calc-table, .oilcard, .charge { width: 100%; border-collapse: collapse; }
.calc-table th, .calc-table td,
.oilcard th, .oilcard td,
.charge th, .charge td {
  border: 1px solid var(--rule);
  padding: 6px 9px;
  text-align: left;
  font-size: .88rem;
}
.calc-table thead th, .oilcard thead th {
  background: var(--wash-deep);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
}
.calc-table .num, .oilcard .num, .charge .num { text-align: right; font-family: var(--mono); }
.calc-table select, .calc-table input {
  width: 100%; border: 0; background: transparent; font: inherit; font-size: .88rem; color: var(--ink);
  padding: 2px 0;
}
.calc-table select:focus, .calc-table input:focus { outline: 1px solid var(--lye-caution); }
.c-oil { width: 40%; } .c-pct { width: 12%; } .c-sap { width: 12%; } .c-g { width: 14%; } .c-x { width: 8%; }
.calc-x button {
  border: 1px solid var(--rule-strong); background: transparent; color: var(--muted);
  width: 22px; height: 22px; line-height: 1; cursor: pointer; font-family: var(--mono);
}
.calc-x button:hover { border-color: var(--lye-caution); color: var(--lye-caution); }
.calc-actions { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; gap: 12px; flex-wrap: wrap; }
.btn-line {
  display: inline-block; border: 1px solid var(--teal); color: var(--teal-dark);
  background: transparent; padding: 7px 14px; font: inherit; font-size: .86rem; cursor: pointer;
}
.btn-line:hover { background: var(--teal); color: #fff; text-decoration: none; }
.calc-total { font-family: var(--mono); font-size: .84rem; color: var(--muted); }
.calc-total.is-off { color: var(--lye-caution); }

.calc-out { padding: 16px; background: var(--wash); }
.outcell { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px dotted var(--rule-strong); padding: 6px 0; }
.out-k { font-size: .78rem; color: var(--muted); letter-spacing: .04em; }
.out-v { font-family: var(--mono); font-size: 1rem; color: var(--teal-dark); }
.calc-warn { margin-top: 12px; border-left: 3px solid var(--lye-caution); padding: 6px 10px; background: #fdeee9; font-size: .84rem; color: var(--lye-caution-dark); }
.calc-note { margin-top: 12px; font-size: .76rem; color: var(--muted); }

.gauges { margin-top: 14px; }
.gauge { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 4px 8px; margin-bottom: 10px; }
.gauge-name { font-size: .76rem; letter-spacing: .05em; color: var(--muted); text-transform: uppercase; }
.gauge-val { font-family: var(--mono); font-size: .84rem; }
.gauge-track {
  grid-column: 1 / -1;
  position: relative;
  height: 10px;
  background: var(--wash-deep);
  border: 1px solid var(--rule-strong);
}
.gauge-band { position: absolute; top: 0; bottom: 0; background: var(--oat); }
.gauge-mark { position: absolute; top: -3px; bottom: -3px; width: 3px; background: var(--teal); }
.gauge-mark.is-low, .gauge-mark.is-high { background: var(--lye-caution); }
.gauge-ref { grid-column: 1 / -1; font-size: .68rem; color: var(--muted); }

/* -------------------------------------------------------------- listings */

.indexlead { padding-bottom: 0; }
.indexlead h1, .indexlead h2 { margin-bottom: .2rem; }
.indexlead p { color: var(--muted); }

.index-block { padding-top: 18px; padding-bottom: 18px; }
.index-head { display: grid; grid-template-columns: 1fr auto; align-items: baseline; border-bottom: 1px solid var(--teal); padding-bottom: 8px; margin-bottom: 16px; }
.index-head h2 { margin: 0; }
.index-head p { grid-column: 1 / -1; margin: 4px 0 0; font-size: .86rem; color: var(--muted); }
.index-head .count { font-family: var(--mono); font-size: .78rem; color: var(--muted); }

.entrylist { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(288px, 1fr)); gap: 16px; }
.entry { background: var(--paper); border: 1px solid var(--rule); }
.entry-link { display: block; color: inherit; }
.entry-link:hover { text-decoration: none; color: inherit; border-color: var(--teal); }
.entry:hover { border-color: var(--teal); }
.entry-fig { border-bottom: 1px solid var(--rule); background: var(--wash); }
.entry-body { display: block; padding: 12px 14px 14px; }
.entry-kicker { display: block; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--teal); }
.entry-name { display: block; font-size: 1.04rem; margin: 4px 0 6px; }
.entry-lede { display: block; font-size: .84rem; color: var(--muted); }
.entry-facts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; font-family: var(--mono); font-size: .72rem; color: var(--muted); }
.entry-facts span { border-top: 2px solid var(--oat); padding-top: 3px; }
.empty { color: var(--muted); font-size: .9rem; }

/* ----------------------------------------------------------------- sheet */

.sheet { background: var(--paper); border: 1px solid var(--rule); margin-top: 22px; padding: 26px 22px 30px; }
.kicker { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--teal); margin-bottom: 6px; }
.lede { font-size: 1.02rem; color: var(--muted); max-width: 68ch; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 22px; }
.chip { border: 1px solid var(--rule-strong); font-size: .78rem; padding: 3px 9px; font-family: var(--mono); }
.chip-k { color: var(--muted); margin-right: 6px; }
/* The desk that writes the entries sits in the same row as the publish date. */
.chip-author { border-color: var(--teal); }
.chip-author .chip-k { color: var(--teal); }
.chip-author a { color: var(--teal-dark); border-bottom: 1px solid var(--rule-strong); }
.chip-author a:hover { color: #fff; background: var(--teal); border-bottom-color: var(--teal); text-decoration: none; }

.plate { margin: 0 0 20px; border: 1px solid var(--rule); background: var(--wash); }
.plate img { width: 100%; }
.plate figcaption { font-size: .74rem; color: var(--muted); padding: 6px 10px; border-top: 1px solid var(--rule); }
.plate-wide { margin-bottom: 26px; }

.stage { border-top: 2px solid var(--teal-dark); padding-top: 14px; margin-bottom: 30px; scroll-margin-top: 64px; }
.stage-head { display: flex; align-items: center; gap: 10px; font-size: 1.12rem; margin-bottom: 14px; }
.stage-key {
  font-family: var(--mono); font-size: .72rem; width: 20px; height: 20px;
  display: grid; place-items: center; background: var(--teal-dark); color: #fff;
}

.cardgrid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.sidecard { }
.oilcard caption { text-align: left; font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-bottom: 6px; }
.charge { margin-bottom: 4px; }
.charge th { width: 42%; font-weight: 400; color: var(--muted); font-size: .8rem; background: var(--wash); }
.charge td.note { color: var(--muted); font-size: .76rem; }
.fineprint { font-size: .72rem; color: var(--muted); margin-top: 12px; }

.prose { max-width: 72ch; }
.prose h3 { margin-top: 18px; }
.ticks { list-style: none; margin: 0 0 .9rem; padding: 0; }
.ticks li { border-left: 3px solid var(--oat); padding-left: 11px; margin-bottom: 7px; font-size: .92rem; }
.subblock { margin-top: 20px; }
.subhead { font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); border-bottom: 1px dotted var(--rule-strong); padding-bottom: 4px; }

.steps { list-style: none; counter-reset: sgstep; margin: 0; padding: 0; display: grid; gap: 10px; }
.steps li { counter-increment: sgstep; display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; }
.steps li::before {
  content: counter(sgstep, decimal-leading-zero);
  font-family: var(--mono); font-size: .78rem;
  width: 28px; height: 28px; display: grid; place-items: center;
  background: var(--wash-deep); border: 1px solid var(--rule-strong); color: var(--teal-dark);
}
.step-body { font-size: .95rem; padding-top: 3px; }

.faults { margin: 0; }
.faults dt { font-size: .88rem; color: var(--lye-caution-dark); border-left: 3px solid var(--lye-caution); padding-left: 9px; margin-top: 10px; }
.faults dd { margin: 3px 0 0 12px; font-size: .9rem; color: var(--muted); }

.wrapup { border-top: 1px solid var(--rule); padding-top: 16px; }
.wrapup h2 { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.qanda { margin: 0; }
.qanda dt { font-size: .95rem; margin-top: 12px; }
.qanda dd { margin: 4px 0 0; font-size: .9rem; color: var(--muted); }

.relay { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.relay a { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: baseline; border: 1px solid var(--rule); padding: 9px 12px; background: var(--wash); }
.relay a:hover { border-color: var(--teal); text-decoration: none; }
.relay-kind { font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--teal); }
.relay-meta { font-family: var(--mono); font-size: .72rem; color: var(--muted); }

.disclaimer { border-left: 3px solid var(--oat-line); padding: 8px 12px; background: var(--wash); font-size: .78rem; color: var(--muted); margin-top: 24px; }

/* ----------------------------------------------------------------- legal */

.legal-block { border-top: 1px solid var(--rule); padding-top: 14px; margin-top: 18px; max-width: 74ch; }
.legal-block h2 { font-size: .92rem; letter-spacing: .06em; text-transform: uppercase; color: var(--teal-dark); }
.legal-block p { font-size: .93rem; }
.stamp { font-family: var(--mono); font-size: .76rem; color: var(--muted); }

.lost { max-width: 1080px; }

/* -------------------------------------------------------------- colophon */

.colophon {
  margin-top: 34px;
  background: var(--teal-dark);
  color: #d9e9e8;
  padding: 26px max(16px, calc((100% - 1080px) / 2)) 18px;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 24px;
}
.colophon a { color: #bfe0de; }
.colophon a:hover { color: #fff; }
.colophon-tag { font-size: 1rem; color: #fff; margin-bottom: 6px; }
.colophon-note, .colophon-mail { font-size: .82rem; color: #a8cbc9; }
.colophon-head { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: #88b5b2; }
.colophon-links ul { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 5px; font-size: .86rem; }
.colophon-fine { grid-column: 1 / -1; border-top: 1px solid #2c5b58; padding-top: 12px; margin: 0; font-size: .74rem; color: #88b5b2; }
.colophon-disclaimer { grid-column: 1 / -1; margin: 8px 0 0; font-size: .72rem; color: #a8cbc9; }

/* --------------------------------------------------------------- narrow */

@media (max-width: 900px) {
  .calc { grid-template-columns: minmax(0, 1fr); }
  .calc-form { border-right: 0; border-bottom: 1px solid var(--rule); }
  .cardgrid { grid-template-columns: minmax(0, 1fr); }
  .colophon { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; }
  .masthead { flex-wrap: wrap; gap: 10px; }
  .topnav { margin-left: 0; }
  .topnav a { padding: 6px 10px; }
}