/* Paper and ink: the page borrows the display's own vocabulary (double rules, inverted tags, hatching). */
@font-face {
  font-family: "Departure Mono";
  src: url("fonts/DepartureMono-Regular.woff2") format("woff2");
  font-display: swap;
}

:root {
  --paper: #ece8dc;
  --paper-deep: #e0dbcc;
  --ink: #2a2330;
  --ink-soft: #5d5562;
  --panel-paper: #c6d3cd;
  --panel-ink: #34283a;
  --bezel: #17161a;
  --warn: #8a2c1d;
  --serif: "Source Serif 4", Georgia, serif;
  --mono: "Departure Mono", ui-monospace, monospace;
  --label: "Silkscreen", var(--mono);
  --cond: "Barlow Condensed", "Arial Narrow", sans-serif;
  --hatch: repeating-linear-gradient(135deg, var(--ink) 0 1px, transparent 1px 4px);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.5 var(--serif);
  -webkit-font-smoothing: antialiased;
}

.mast, main, .colophon {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.mast { padding-top: 36px; }
.mast-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 3px solid var(--ink);
  box-shadow: 0 3px 0 var(--paper), 0 4px 0 var(--ink);
  padding-bottom: 6px;
}
.mast h1 {
  margin: 0;
  font: 700 clamp(56px, 11vw, 112px)/0.86 var(--cond);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.mast-date {
  margin: 0;
  font: 11px/1 var(--label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: right;
}
.mast-sub {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 19px;
  text-wrap: balance;
}

.tag {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  font: 10px/1 var(--label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 7px 3px;
}

.fine { font-size: 14px; color: var(--ink-soft); margin: 10px 0 0; }
esp-web-install-button + .fine { margin-top: 18px; }
.warn { font-size: 14px; color: var(--warn); margin: 10px 0 0; }

/* ── the stage ── */
.stage {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 1fr);
  gap: 36px;
  align-items: start;
  margin-top: 36px;
}
.device {
  background: var(--bezel);
  padding: clamp(10px, 2vw, 18px);
  border-radius: 14px;
  box-shadow: 0 1px 0 #3a3940 inset, 0 18px 40px -22px rgba(42, 35, 48, 0.7);
}
.device canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  background: var(--panel-paper);
}

.controls { display: grid; gap: 20px; }
.control { display: grid; gap: 8px; justify-items: start; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button {
  appearance: none;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font: 13px/1 var(--mono);
  padding: 8px 10px 7px;
  cursor: pointer;
}
.chips button:hover { background: var(--paper-deep); }
.chips button[aria-checked="true"] { background: var(--ink); color: var(--paper); }

.scrub { display: flex; align-items: center; gap: 14px; width: 100%; }
.scrub output { font: 600 34px/1 var(--cond); min-width: 3.2ch; font-variant-numeric: tabular-nums; }
input[type="range"] {
  appearance: none;
  flex: 1;
  height: 22px;
  background:
    linear-gradient(var(--ink), var(--ink)) center / 100% 1px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px calc(100% / 24)) center / 100% 9px no-repeat;
  cursor: ew-resize;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 11px;
  height: 22px;
  background: var(--ink);
  border: 0;
}
input[type="range"]::-moz-range-thumb { width: 11px; height: 22px; background: var(--ink); border: 0; border-radius: 0; }

/* ── the steps ── */
.steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1.6fr;
  gap: 0;
  margin-top: 44px;
  border-top: 3px solid var(--ink);
  position: relative;
}
.steps::before {
  content: "";
  position: absolute;
  inset: 3px 0 auto;
  height: 1px;
  background: var(--ink);
}
.step { padding: 22px 26px 30px 0; }
.step + .step { padding-left: 26px; border-left: 1px dotted var(--ink); }
.step:last-child { padding-right: 0; }
.step h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 10px;
  font: 700 30px/1 var(--cond);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.num {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  background: var(--ink);
  color: var(--paper);
  font: 600 22px/1 var(--cond);
}
.step p { margin: 0 0 14px; }

.field { display: grid; gap: 6px; justify-items: start; margin: 0 0 14px; min-width: 0; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; align-items: end; }
input:not([type="range"]), select {
  width: 100%;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: #f5f2e9;
  color: var(--ink);
  font: 15px/1.2 var(--mono);
  padding: 9px 10px 8px;
}
input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset:disabled { opacity: 0.45; }

.button {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font: 600 20px/1 var(--cond);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 18px 11px;
  cursor: pointer;
  box-shadow: 4px 4px 0 -1px var(--paper), 4px 4px 0 0 var(--ink);
}
.button:hover { background: #40364a; }
.button:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 -1px var(--paper), 2px 2px 0 0 var(--ink); }
.link {
  appearance: none;
  border: 0;
  background: none;
  color: var(--ink);
  font: 14px/1.2 var(--mono);
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0;
  cursor: pointer;
  justify-self: start;
  margin-bottom: 14px;
}
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 6px; }
.actions .link, .actions .fine { margin: 0; }

.readout { margin: 18px 0 0; border-top: 1px solid var(--ink); }
.readout div {
  display: grid;
  grid-template-columns: 9ch 1fr;
  gap: 10px;
  padding: 7px 0 6px;
  border-bottom: 1px dotted var(--ink);
  font: 13px/1.3 var(--mono);
}
.readout dt { text-transform: uppercase; font: 10px/1.6 var(--label); letter-spacing: 0.12em; }
.readout dd { margin: 0; overflow-wrap: anywhere; }

.colophon {
  margin-top: 40px;
  padding-bottom: 40px;
}
.colophon p {
  margin: 0;
  padding-top: 14px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--hatch) top / 100% 5px no-repeat;
}

@media (max-width: 900px) {
  .stage { grid-template-columns: 1fr; gap: 24px; }
  .steps { grid-template-columns: 1fr; }
  .step, .step + .step { padding: 20px 0 24px; border-left: 0; }
  .step + .step { border-top: 1px dotted var(--ink); }
}
@media (max-width: 520px) {
  .mast, main, .colophon { padding: 0 16px; }
  .mast-row { flex-direction: column; gap: 8px; }
  .mast-date { text-align: left; }
  .pair { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .button:active { transform: none; }
}
.fine a { color: inherit; text-underline-offset: 3px; }