/* TOKENS (locked)
   palette: paper #EFE3C8 · paper-deep #E3D2AC · ink #1A1410 · ink-soft #4A3B2E · ember #C4401B (accent, sparing)
   type: Pirata One (blackletter display) · IM Fell English (body, 1670s Fell types) · IM Fell English SC (labels)
   spacing: 4 8 12 16 24 32 48 72 px · radius: 0 everywhere (it is paper) · rules: 1px / 3px double ink
   motion: one idiom, a stepped flame flicker; fire growth is driven by a real elapsed-time var --heat (0..1) */
@font-face { font-family: "Pirata One"; src: url(/fonts/pirata-one.woff2) format("woff2"); font-display: swap; }
@font-face { font-family: "Fell"; src: url(/fonts/fell.woff2) format("woff2"); font-display: swap; }
@font-face { font-family: "Fell"; font-style: italic; src: url(/fonts/fell-italic.woff2) format("woff2"); font-display: swap; }
@font-face { font-family: "Fell SC"; src: url(/fonts/fell-sc.woff2) format("woff2"); font-display: swap; }

:root {
  --paper: #EFE3C8; --paper-deep: #E3D2AC; --ink: #1A1410; --ink-soft: #4A3B2E; --ember: #C4401B;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px; --s8: 72px;
  --display: "Pirata One", "Georgia", serif;
  --body: "Fell", "Georgia", serif;
  --sc: "Fell SC", "Georgia", serif;
  --heat: 0;
  --floor-max: 42vh;
}
* { box-sizing: border-box; }
html { background: var(--paper); }
body {
  margin: 0; color: var(--ink); font: 19px/1.45 var(--body);
  background:
    radial-gradient(ellipse at 18% 12%, rgba(120, 80, 30, .10), transparent 40%),
    radial-gradient(ellipse at 82% 70%, rgba(120, 80, 30, .08), transparent 45%),
    var(--paper);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
#errbar { position: fixed; top: 0; left: 0; right: 0; z-index: 99; background: var(--ink); color: var(--paper); font: 14px/1.4 monospace; padding: 8px 12px; }

/* ---------- sheet ---------- */
.sheet { position: relative; z-index: 1; max-width: 1180px; margin: 0 auto; padding: var(--s6) var(--s5) calc(var(--s8) + var(--heat) * var(--floor-max)); }

.mast { text-align: center; border-bottom: 3px double var(--ink); padding-bottom: var(--s3); }
.mast__ears { display: flex; justify-content: space-between; gap: var(--s4); font: 15px/1.3 var(--sc); letter-spacing: .04em; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); padding: var(--s1) 0; }
.mast__title { font: 400 clamp(64px, 13vw, 168px)/0.95 var(--display); margin: var(--s4) 0 var(--s2); letter-spacing: .01em; }
.mast__word { display: inline-block; }
.mast__sub { display: flex; justify-content: center; align-items: center; gap: var(--s4); font: italic 19px/1.3 var(--body); border-top: 1px solid var(--ink); padding-top: var(--s2); }
.mast__orn { color: var(--ember); font-style: normal; }

/* condition wire: the dog cell never changes, the rest escalate */
.wire { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; border-bottom: 1px solid var(--ink); }
.wire__cell { padding: var(--s3) var(--s4); border-right: 1px solid var(--ink); display: flex; flex-direction: column; gap: 2px; }
.wire__cell:last-child { border-right: 0; }
.wire__k { font: 14px/1.2 var(--sc); letter-spacing: .05em; color: var(--ink-soft); }
.wire__v { font: 400 26px/1.1 var(--display); }
.wire__v--fine { font-size: 34px; }
.wire__v--num { font-variant-numeric: tabular-nums; }
#room { color: color-mix(in srgb, var(--ink) calc(100% - var(--heat) * 100%), var(--ember)); }

/* ---------- front page ---------- */
.front { display: grid; grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr); gap: 0; border-bottom: 1px solid var(--ink); }
.lead { padding: var(--s5) var(--s5) var(--s5) 0; border-right: 1px solid var(--ink); }
.rail { padding: var(--s5) 0 var(--s5) var(--s5); display: flex; flex-direction: column; gap: var(--s5); }
.kicker { font: 15px/1.2 var(--sc); letter-spacing: .06em; margin: 0 0 var(--s2); color: var(--ink-soft); }
.lead__head { font: 400 clamp(38px, 5.4vw, 68px)/1.0 var(--display); margin: 0; }
.lead__deck { font: italic 23px/1.3 var(--body); margin: var(--s2) 0 var(--s4); border-bottom: 1px solid var(--ink); padding-bottom: var(--s3); }
.plate { margin: 0 0 var(--s4); }
.plate img { border: 1px solid var(--ink); filter: sepia(.12) contrast(1.03); }
.plate figcaption { font: italic 15px/1.35 var(--body); margin-top: var(--s2); color: var(--ink-soft); }
.cols { column-count: 2; column-gap: var(--s6); column-rule: 1px solid var(--ink); text-align: justify; hyphens: auto; }
.cols p { margin: 0 0 var(--s3); }
.dropcap::first-letter { float: left; font: 400 84px/0.78 var(--display); padding: 8px 8px 0 0; color: var(--ember); }

.box { border: 1px solid var(--ink); padding: var(--s4); background: rgba(227, 210, 172, .45); }
.box__head { font: 400 32px/1 var(--display); margin: 0 0 var(--s1); }
.box__sub { font: italic 15px/1.3 var(--body); margin: 0 0 var(--s3); color: var(--ink-soft); }
.stop__list { list-style: none; margin: 0; padding: 0; }
.stop__list li { padding: var(--s2) 0; border-top: 1px dotted var(--ink-soft); font-size: 17px; line-height: 1.35; }
.stop__list li.is-new { animation: inked .9s steps(4) both; }
.stop__t { font: 14px var(--sc); color: var(--ember); margin-right: 4px; font-variant-numeric: tabular-nums; }
@keyframes inked { from { opacity: 0; filter: blur(2px); } to { opacity: 1; filter: none; } }

.notice__label { font: 15px/1.3 var(--sc); letter-spacing: .04em; margin: 0 0 var(--s3); }
.ca { display: block; width: 100%; text-align: left; background: var(--paper); border: 1px dashed var(--ink); padding: var(--s2) var(--s3); cursor: pointer; font: inherit; color: inherit; }
.ca__k { display: block; font: 13px var(--sc); letter-spacing: .05em; color: var(--ink-soft); }
.ca__v { display: block; font: 17px/1.3 var(--body); word-break: break-all; }
.ca:hover, .ca:focus-visible { background: #F6ECD6; outline: none; border-style: solid; }
.notice__row { display: flex; gap: var(--s2); margin-top: var(--s3); flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 var(--s4); border: 2px solid var(--ink); background: var(--paper); color: var(--ink); font: 400 22px/1 var(--display); text-decoration: none; cursor: pointer; box-shadow: 3px 3px 0 var(--ink); transition: transform .12s, box-shadow .12s; }
.btn:hover, .btn:focus-visible { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); outline: none; }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn--ember { background: var(--ember); color: var(--paper); flex: 1 1 auto; font: 20px/1 var(--sc); letter-spacing: .04em; }
.btn--x { padding: 0 var(--s2); min-width: 52px; }
.btn--x img { width: 34px; height: 34px; }
.btn--bell { width: 100%; }
.warn__txt { margin: 0 0 var(--s3); }
.warn__reply { margin: var(--s3) 0 0; font-size: 16px; color: var(--ink-soft); }
.warn__reply b { color: var(--ink); font-weight: 400; font-family: var(--display); font-size: 22px; }
.bell-ring { animation: ring .5s steps(6); }
@keyframes ring { 0%,100% { transform: rotate(0); } 25% { transform: rotate(-3deg); } 50% { transform: rotate(3deg); } 75% { transform: rotate(-2deg); } }

.rule--double { border-top: 3px double var(--ink); margin: 0; }
.back { display: grid; grid-template-columns: 1fr 1.1fr 1fr; border-bottom: 1px solid var(--ink); }
.col { padding: var(--s5); border-right: 1px solid var(--ink); }
.col:first-child { padding-left: 0; }
.col:last-child { border-right: 0; padding-right: 0; }
.col__head { font: 400 30px/1 var(--display); margin: 0 0 var(--s3); }
.col__head--mt { margin-top: var(--s5); }
.col p { margin: 0 0 var(--s3); }
.qa { margin: 0; }
.qa dt { font-style: italic; margin-top: var(--s3); }
.qa dt::before { content: "Q. "; font: 15px var(--sc); }
.qa dd { margin: 0; }
.qa dd::before { content: "A. "; font: 15px var(--sc); }
.qa dd:last-child { font: 400 30px/1.1 var(--display); margin-top: 2px; }
.letter .sig { display: block; text-align: right; font: 15px var(--sc); }
.letter--reply { border-left: 3px solid var(--ember); padding-left: var(--s3); }
.colophon { text-align: center; padding-top: var(--s5); font-style: italic; }
.colophon p { margin: 0 auto var(--s2); max-width: 640px; }
.colophon__small { font-size: 15px; color: var(--ink-soft); }

/* ---------- the fire (driven by --heat from js/fire.js) ---------- */
.fire { position: fixed; inset: 0; z-index: 2; pointer-events: none; }
.fire__floor, .fire__side, .fire__scorch { position: absolute; mix-blend-mode: multiply; }
.fire__floor {
  left: 0; right: 0; bottom: 0;
  height: calc(var(--heat) * var(--floor-max));
  -webkit-mask-image: linear-gradient(to top, #000 70%, transparent);
  mask-image: linear-gradient(to top, #000 70%, transparent);
  background: url(/img/flames.webp) repeat-x left bottom / auto 100%;
  animation: flick 1.1s steps(3) infinite;
}
.fire__side { top: 0; bottom: 0; width: calc(var(--heat) * 13vw); animation: flick 1.3s steps(3) infinite; }
.fire__side--l { left: 0; background: url(/img/flames-left.webp) repeat-y left bottom / 100% auto; }
.fire__side--r { right: 0; background: url(/img/flames-right.webp) repeat-y right bottom / 100% auto; animation-delay: -.4s; }
/* sides climb from the floor: a feathered mask rises with heat, no hard edge */
.fire__side {
  -webkit-mask-image: linear-gradient(to top, #000 calc(var(--heat) * 100% - 12%), transparent calc(var(--heat) * 100%));
  mask-image: linear-gradient(to top, #000 calc(var(--heat) * 100% - 12%), transparent calc(var(--heat) * 100%));
}
.fire__scorch { inset: 0; opacity: calc(var(--heat) * .9); background: radial-gradient(ellipse at 50% 45%, transparent 55%, rgba(110, 50, 10, .55) 100%); }
@keyframes flick { 0% { filter: none; transform: translateY(0); } 33% { filter: saturate(1.2); transform: translateY(-2px) scaleY(1.02); } 66% { filter: brightness(1.05); transform: translateY(1px); } }
.sheet.is-singed .mast__title { text-shadow: 0 0 calc(var(--heat) * 18px) rgba(196, 64, 27, .55); }

@media (prefers-reduced-motion: reduce) {
  .fire__floor, .fire__side { animation: none; }
  .stop__list li.is-new, .bell-ring { animation: none; }
  .btn { transition: none; }
}

/* ---------- narrow ---------- */
@media (max-width: 919px) {
  .front { grid-template-columns: 1fr; }
  .lead { border-right: 0; padding-right: 0; border-bottom: 1px solid var(--ink); }
  .rail { padding-left: 0; }
  .back { grid-template-columns: 1fr 1fr; }
  .col--plate { order: -1; grid-column: 1 / -1; padding-left: 0; padding-right: 0; border-right: 0; border-bottom: 1px solid var(--ink); }
  .col--plate .plate { max-width: 440px; margin: 0 auto; }
  .col:last-child { padding-left: var(--s5); }
  .wire { grid-template-columns: 1fr 1fr; }
  .wire__cell:nth-child(2) { border-right: 0; }
  .wire__cell:nth-child(-n+2) { border-bottom: 1px solid var(--ink); }
}
@media (max-width: 620px) {
  :root { --floor-max: 30vh; }
  body { font-size: 18px; }
  .sheet { padding: var(--s4) var(--s4) calc(var(--s7) + var(--heat) * var(--floor-max)); }
  .mast__ears .mast__mid { display: none; }
  .mast__sub { flex-wrap: wrap; gap: var(--s2); font-size: 16px; }
  .cols { column-count: 1; }
  .back { grid-template-columns: 1fr; }
  .col, .col:first-child, .col:last-child { padding: var(--s5) 0; border-right: 0; border-bottom: 1px solid var(--ink); }
  .col:last-child { border-bottom: 0; }
  .wire__v { font-size: 22px; }
  .wire__v--fine { font-size: 28px; }
  .fire__side { width: calc(var(--heat) * 6vw); }
}