/* Stop Fix Wash: a darkroom notebook. Two faces only: Archivo (variable width) and JetBrains Mono. */
@font-face {
  font-family: "Archivo";
  src: url("/static/fonts/archivo.4c98b9d490.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/static/fonts/jbmono.2c32b9b3ee.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f3efe6;
  --paper-2: #e9e3d5;
  --paper-3: #ddd5c3;
  --ink: #1d1b17;
  --ink-2: #5b554a;
  --rule: #cdc3ae;
  --accent: #b5561c;        /* stop-bath indicator amber */
  --accent-soft: #b5561c22;
  --film: #1a1714;
  --edge: #e3a33d;          /* edge-print orange */
  --hole: var(--paper);
  --ok: #3f6b3a;
  --shadow: 0 1px 0 #0000000d, 0 8px 24px -12px #3b2a1640;
  --radius: 3px;
  --wide: 70rem;
  --text: 40rem;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}
:root[data-tone="dark"] { color-scheme: dark; }
@media (prefers-color-scheme: dark) {
  :root:not([data-tone="light"]) { color-scheme: dark; }
}
/* Dark = working under the safelight. */
@media (prefers-color-scheme: dark) {
  :root:not([data-tone="light"]) {
    --paper: #120f0e; --paper-2: #1b1615; --paper-3: #261e1c;
    --ink: #eadcd2; --ink-2: #a8958a; --rule: #3a2e2a;
    --accent: #e5533f; --accent-soft: #e5533f26;
    --film: #060505; --edge: #d2563c; --ok: #8fbf86; --hole: var(--paper-3);
    --shadow: 0 0 0 1px #ffffff08, 0 10px 30px -14px #000;
  }
}
:root[data-tone="dark"] {
  --paper: #120f0e; --paper-2: #1b1615; --paper-3: #261e1c;
  --ink: #eadcd2; --ink-2: #a8958a; --rule: #3a2e2a;
  --accent: #e5533f; --accent-soft: #e5533f26;
  --film: #060505; --edge: #d2563c; --ok: #8fbf86; --hole: var(--paper-3);
  --shadow: 0 0 0 1px #ffffff08, 0 10px 30px -14px #000;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.62 var(--sans);
  font-stretch: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color .3s ease, color .3s ease;
}
main { flex: 1; }
img, svg { max-width: 100%; height: auto; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1.5px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent); color: var(--paper); }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem .8rem; z-index: 10; }
.skip:focus { left: .5rem; top: .5rem; }

.wrap { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; }
.measure { max-width: var(--text); }

/* ---- film rebate along the top --------------------------------------- */
.rebate {
  --h: 34px;
  height: var(--h);
  background:
    radial-gradient(ellipse 4.5px 3.5px at 50% 50%, var(--hole) 0 98%, transparent 100%) 0 20px / 22px 10px repeat-x,
    var(--film);
  position: relative;
  overflow: hidden;
}
.rebate span {
  position: absolute; inset: 0 0 auto 0;
  display: flex; align-items: center; gap: 2.4rem;
  padding: 6px 0 0 1.2rem;
  font: 600 .62rem/1 var(--mono);
  letter-spacing: .18em;
  color: var(--edge);
  white-space: nowrap;
  animation: feed 1.1s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes feed { from { transform: translateX(-3rem); opacity: 0; } to { transform: none; opacity: .92; } }

/* ---- masthead ------------------------------------------------------------- */
.mast { border-bottom: 1px solid var(--rule); }
.mast .wrap { display: flex; align-items: center; gap: 1.5rem; padding-block: .9rem; flex-wrap: wrap; }
.mark {
  display: inline-flex; align-items: baseline; gap: .35rem;
  text-decoration: none; color: var(--ink);
  font: 850 1.45rem/1 var(--sans); font-stretch: 66%;
  letter-spacing: .02em; text-transform: uppercase;
}
.mark i { font-style: normal; color: var(--accent); font-stretch: 100%; font-weight: 500; transition: transform .25s ease; display: inline-block; }
.mark:hover { color: var(--ink); }
.mark:hover i { transform: translateX(2px); }
.mark .dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--accent); align-self: center; margin-right: .2rem; box-shadow: 0 0 0 0 var(--accent-soft); animation: glow 3.2s ease-in-out infinite; }
@keyframes glow { 50% { box-shadow: 0 0 0 6px var(--accent-soft); } }
.nav { display: flex; gap: .2rem; margin-left: auto; flex-wrap: wrap; }
.nav a {
  text-decoration: none; padding: .38rem .7rem; border-radius: var(--radius);
  font: 600 .86rem/1 var(--sans); font-stretch: 88%; letter-spacing: .04em; text-transform: uppercase;
  color: var(--ink-2); position: relative;
}
.nav a::after { content: ""; position: absolute; left: .7rem; right: .7rem; bottom: .12rem; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .25s ease; }
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a[aria-current]::after { transform: scaleX(1); }
.nav a[aria-current] { color: var(--ink); }
.tone {
  border: 1px solid var(--rule); background: transparent; color: var(--ink-2);
  width: 2.1rem; height: 2.1rem; border-radius: 50%; cursor: pointer; display: grid; place-items: center;
  transition: border-color .2s, color .2s, transform .3s;
}
.tone:hover { color: var(--accent); border-color: var(--accent); transform: rotate(-20deg); }
.tone svg { width: 1rem; height: 1rem; }

/* ---- type ------------------------------------------------------------------- */
h1, h2, h3 { line-height: 1.08; margin: 0 0 .6em; }
h1 { font: 850 clamp(2.3rem, 6vw, 4.1rem)/0.98 var(--sans); font-stretch: 64%; text-transform: uppercase; letter-spacing: .005em; }
h2 { font: 800 1.6rem/1.1 var(--sans); font-stretch: 72%; text-transform: uppercase; letter-spacing: .02em; margin-top: 2.2em; }
h3 { font: 700 1.1rem/1.25 var(--sans); font-stretch: 90%; margin-top: 1.6em; }
p, ul, ol { margin: 0 0 1em; }
li { margin-bottom: .3em; }
.lede { font-size: 1.2rem; color: var(--ink-2); max-width: 38rem; }
.kicker { font: 600 .72rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; display: block; }
.num, code, kbd { font-family: var(--mono); font-size: .92em; font-variant-numeric: tabular-nums; }
code { background: var(--paper-2); padding: .08em .35em; border-radius: 2px; }
hr { border: 0; border-top: 1px dashed var(--rule); margin: 2.5rem 0; }
small, .small { font-size: .86rem; color: var(--ink-2); }

.page-head { padding: 3.2rem 0 1.6rem; }
.page-head p { max-width: 40rem; }
.section { padding-bottom: 3.5rem; }

/* ---- note boxes ------------------------------------------------------------------- */
.caution {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: .9rem 1.1rem; margin: 1.4rem 0 2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .95rem; max-width: 46rem;
}
.caution strong { font-stretch: 85%; text-transform: uppercase; letter-spacing: .05em; font-size: .82rem; display: block; margin-bottom: .2rem; color: var(--accent); }
.caution p:last-child { margin: 0; }

/* ---- home: three frames ------------------------------------------------------------- */
.strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  background: var(--film); padding: 26px 10px; border-radius: 2px;
  position: relative; margin: 1rem 0 3rem;
  background-image:
    radial-gradient(circle, var(--paper) 0 3px, transparent 3.5px),
    radial-gradient(circle, var(--paper) 0 3px, transparent 3.5px);
  background-size: 18px 10px, 18px 10px;
  background-position: 4px 7px, 4px calc(100% - 7px);
  background-repeat: repeat-x;
}
.frame {
  background: var(--paper-2); margin: 0 5px; padding: 1.4rem 1.3rem 1.2rem;
  min-height: 14rem; display: flex; flex-direction: column; position: relative;
  text-decoration: none; color: var(--ink);
  transition: transform .3s cubic-bezier(.2,.7,.2,1), background-color .3s, box-shadow .3s;
}
.frame:hover { transform: translateY(-4px); background: var(--paper); box-shadow: var(--shadow); color: var(--ink); }
.frame b { font: 900 clamp(2.6rem, 7vw, 4.4rem)/.9 var(--sans); font-stretch: 62%; letter-spacing: .01em; display: block; }
.frame b::after { content: ""; display: block; width: 2.2rem; height: 4px; background: var(--accent); margin-top: .7rem; transition: width .35s ease; }
.frame:hover b::after { width: 4.4rem; }
.frame p { margin: .9rem 0 0; color: var(--ink-2); font-size: .95rem; }
.frame .num { margin-top: auto; padding-top: 1rem; font-size: .82rem; color: var(--ink); }
.frame::before {
  content: attr(data-n); position: absolute; top: -22px; left: 10px;
  font: 600 .6rem/1 var(--mono); letter-spacing: .14em; color: var(--edge);
  background: var(--film); padding: 3px 6px;
}

.duo { display: grid; grid-template-columns: 1.15fr .85fr; gap: 3rem; align-items: start; }
.duo h2 { margin-top: 0; }
.feed { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule); }
.feed li { margin: 0; border-bottom: 1px solid var(--rule); }
.feed a { display: grid; grid-template-columns: 6.6rem 1fr; gap: 1rem; padding: 1rem .2rem; text-decoration: none; transition: background-color .2s, padding .25s; }
.feed a:hover { background: var(--paper-2); padding-left: .7rem; color: var(--ink); }
.feed time { font: 500 .78rem/1.7 var(--mono); color: var(--ink-2); }
.feed strong { display: block; font-weight: 700; font-stretch: 92%; font-size: 1.08rem; line-height: 1.3; }
.feed span { color: var(--ink-2); font-size: .93rem; }

.card { background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius); padding: 1.3rem 1.4rem; }
.card h3 { margin-top: 0; }

/* ---- tables -------------------------------------------------------------------------- */
.tablewrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--paper); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
thead th { position: sticky; top: 0; background: var(--paper-2); font: 700 .74rem/1.2 var(--sans); font-stretch: 85%; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); white-space: nowrap; }
tbody tr { transition: background-color .15s; }
tbody tr:hover { background: var(--accent-soft); }
tbody tr:last-child td { border-bottom: 0; }
td.t { font-family: var(--mono); font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.ei, td.dil { font-family: var(--mono); font-size: .88rem; white-space: nowrap; }
td.src a { font-size: .85rem; color: var(--ink-2); }
tr.film-break td { border-top: 2px solid var(--ink); }
.hot { color: var(--accent); }

.filters { display: flex; gap: .8rem; flex-wrap: wrap; align-items: end; margin: 0 0 1rem; }
.filters[hidden] { display: none; }
label.field { display: grid; gap: .3rem; font: 600 .74rem/1 var(--sans); font-stretch: 88%; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); }
select, input[type="number"], input[type="email"], input[type="password"], input[type="text"] {
  font: 500 1rem/1.2 var(--sans); color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule); border-radius: var(--radius); padding: .6rem .7rem; min-width: 9rem;
  transition: border-color .2s, box-shadow .2s;
}
input[type="number"] { font-family: var(--mono); width: 8rem; min-width: 0; }
select:focus, input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.count { font: 500 .8rem/1 var(--mono); color: var(--ink-2); margin-left: auto; align-self: center; }

.btn {
  font: 700 .9rem/1 var(--sans); font-stretch: 86%; letter-spacing: .06em; text-transform: uppercase;
  background: var(--ink); color: var(--paper); border: 1px solid var(--ink); border-radius: var(--radius);
  padding: .78rem 1.2rem; cursor: pointer; transition: background-color .2s, color .2s, transform .1s;
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { color: #fff; }

/* ---- calculator --------------------------------------------------------------------- */
.bench { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 1.2rem; }
.tool { background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius); padding: 1.3rem 1.4rem 1.4rem; display: flex; flex-direction: column; gap: .9rem; transition: border-color .25s, box-shadow .25s; }
.tool:focus-within { border-color: var(--accent); box-shadow: var(--shadow); }
.tool h2 { margin: 0; font-size: 1.25rem; }
.tool .row { display: flex; gap: .7rem; flex-wrap: wrap; }
.tool .row > * { flex: 1 1 8rem; }
.tool select, .tool input { width: 100%; min-width: 0; }
.readout { font: 700 2.5rem/1 var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.readout small { font: 500 .8rem/1.4 var(--sans); display: block; letter-spacing: 0; margin-top: .4rem; }
.readout.flash { animation: flash .5s ease; }
@keyframes flash { from { color: var(--accent); } }
.tool .small { margin: 0; }

.clock { text-align: center; padding: 1.2rem 0 .4rem; }
.clock .readout { font-size: clamp(3rem, 12vw, 5.2rem); }
.clock .cue { font: 700 .9rem/1 var(--sans); font-stretch: 85%; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-2); min-height: 1.2rem; margin-top: .6rem; }
.clock.agitate .cue { color: var(--accent); animation: pulse .9s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.clock .btns { display: flex; gap: .6rem; justify-content: center; margin-top: 1rem; }

/* ---- diagrams ------------------------------------------------------------------------- */
figure { margin: 1.8rem 0; }
figcaption { font-size: .86rem; color: var(--ink-2); margin-top: .5rem; }
.dg { color: var(--ink); }
.dg .ln { stroke: currentColor; fill: none; stroke-width: 1.5; }
.dg .grid { stroke: var(--rule); stroke-width: 1; }
.dg .acc { stroke: var(--accent); fill: none; stroke-width: 2.5; }
.dg .accf { fill: var(--accent); }
.dg .soft { fill: var(--paper-3); }
.dg text { fill: var(--ink-2); font: 500 11px var(--mono); }
.dg .lbl { fill: var(--ink); font: 700 12px var(--sans); }

/* ---- long-form notes ---------------------------------------------------------------------- */
.prose { max-width: var(--text); }
.prose h2 { font-size: 1.3rem; margin-top: 2.2em; }
.prose table { margin: 1rem 0 1.5rem; }
.prose li::marker { color: var(--accent); }
.byline { font: 500 .8rem/1 var(--mono); color: var(--ink-2); display: flex; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 2rem; }
.sources { font-size: .9rem; border-top: 1px dashed var(--rule); padding-top: 1rem; margin-top: 2.5rem; color: var(--ink-2); }
.sources ol { padding-left: 1.2rem; }

/* ---- archive door ---------------------------------------------------------------------- */
.door { max-width: 24rem; margin: 3.5rem auto 4rem; }
.door h1 { font-size: 2.4rem; }
.door form { display: grid; gap: 1rem; margin-top: 1.4rem; }
.door input { width: 100%; }
.door .msg { padding: .75rem .9rem; border-radius: var(--radius); font-size: .93rem; border: 1px solid var(--rule); background: var(--paper-2); }
.door .msg.bad { border-color: var(--accent); }
.door .msg[hidden] { display: none; }
.door .aside { font-size: .88rem; color: var(--ink-2); margin-top: 1.4rem; }
.trap { position: absolute; left: -5000px; width: 1px; height: 1px; overflow: hidden; }

/* ---- footer ------------------------------------------------------------------------------- */
.foot { border-top: 1px solid var(--rule); margin-top: 2rem; padding: 1.8rem 0 2.4rem; font-size: .86rem; color: var(--ink-2); }
.foot .wrap { display: grid; grid-template-columns: 1fr auto; gap: 1rem 2rem; }
.foot p { margin: 0; max-width: 44rem; }
.foot nav { display: flex; gap: 1.1rem; align-items: start; }
.foot nav a { color: var(--ink-2); text-decoration: none; }
.foot nav a:hover { color: var(--accent); }

.lost { text-align: center; padding: 5rem 0 4rem; }
.lost .readout { font-size: 5rem; color: var(--accent); }

/* ---- motion ------------------------------------------------------------------------------- */
.rise { animation: rise .6s cubic-bezier(.2,.7,.2,1) both; }
.rise:nth-child(2) { animation-delay: .08s; }
.rise:nth-child(3) { animation-delay: .16s; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

@media (max-width: 760px) {
  body { font-size: 1rem; }
  .strip { grid-template-columns: 1fr; padding: 22px 8px; gap: 26px; }
  .frame { min-height: 0; }
  .duo { grid-template-columns: 1fr; gap: 2rem; }
  .nav { margin-left: 0; width: 100%; order: 3; justify-content: space-between; flex-wrap: nowrap; gap: 0; }
  .nav a { padding: .4rem .3rem; font-size: .78rem; font-stretch: 76%; letter-spacing: .03em; }
  .nav a::after { left: .3rem; right: .3rem; }
  .card td:first-child { white-space: nowrap; }
  .mast .wrap { gap: .8rem; }
  .tone { margin-left: auto; }
  .feed a { grid-template-columns: 1fr; gap: .2rem; }
  .foot .wrap { grid-template-columns: 1fr; }
  th, td { padding: .5rem .55rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media print {
  .rebate, .nav, .tone, .foot nav, .filters { display: none; }
  body { background: #fff; color: #000; }
}