style.css

:root {
  --ground: #f6f4ef;
  --ink: #2f3a45;
  --soft: #5d6b78;
  --accent-dark: #b8534a;
  --sky: #9ad0ec;
  --paper: #fffdf8;
  --thermal: #241f1c;
  color: var(--ink);
  background: var(--ground);
  font-family: "M PLUS Rounded 1c", system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

/* The UA gives [hidden] display:none, but any author `display` rule outranks
   it. Several components below set display, so without this they stay visible
   while hidden and the JS toggles do nothing. */
[hidden] { display: none !important; }
html { min-width: 320px; }
body {
  margin: 0;
  overflow-x: hidden;
  background-color: var(--ground);
  background-image:
    radial-gradient(circle at 12% 8%, rgb(154 208 236 / 42%), transparent 46%),
    radial-gradient(circle at 88% 4%, rgb(244 151 142 / 30%), transparent 40%),
    radial-gradient(circle at 78% 72%, rgb(184 224 200 / 34%), transparent 44%);
  background-attachment: fixed;
}

body.disco-lights {
  background-color: #151126;
  background-image:
    radial-gradient(ellipse at 10% 18%, rgb(255 55 133 / 88%) 0 5%, transparent 25%),
    radial-gradient(ellipse at 84% 14%, rgb(49 224 255 / 82%) 0 6%, transparent 27%),
    radial-gradient(ellipse at 72% 78%, rgb(168 85 255 / 84%) 0 7%, transparent 29%),
    radial-gradient(ellipse at 18% 82%, rgb(255 211 61 / 78%) 0 5%, transparent 24%),
    conic-gradient(from 28deg at 50% 45%, #151126, #351450, #073d61, #50122d, #151126);
  background-size: 135% 135%, 145% 145%, 150% 150%, 130% 130%, 100% 100%;
  animation: disco-lights 4.8s linear infinite;
}

@keyframes disco-lights {
  from { background-position: 0% 0%, 100% 0%, 100% 100%, 0% 100%, 50% 50%; }
  50% { background-position: 100% 55%, 0% 100%, 20% 0%, 100% 20%, 50% 50%; }
  to { background-position: 0% 0%, 100% 0%, 100% 100%, 0% 100%, 50% 50%; }
}

a { color: var(--accent-dark); }
a:hover { color: var(--ink); }

.page-shell {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 20px 0;
  overflow: hidden;
}

.site-header { align-self: stretch; z-index: 2; }
.hack-club-mark { display: block; width: fit-content; margin: 0 0 -30px -20px; line-height: 0; }
.hack-club-mark img { display: block; width: clamp(150px, 18vw, 214px); height: auto; }

.hero { display: flex; flex-direction: column; align-items: center; width: 100%; }
.terminal-wrap { width: min(540px, 94vw); aspect-ratio: 0.76; margin-top: -6px; }
.terminal-wrap pos-terminal { width: 100%; height: 100%; }

h1 {
  max-width: 660px;
  margin: 18px 0 0;
  font-family: "Unkempt", cursive;
  font-size: clamp(28px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.6px;
  text-align: center;
  text-wrap: balance;
}

.intro {
  max-width: 470px;
  margin: 16px 0 0;
  color: var(--soft);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
  text-wrap: pretty;
}

.intro a,
.intro strong { color: var(--accent-dark); font-weight: 700; }
.intro a { text-decoration-thickness: 2px; text-underline-offset: 3px; }

.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 22px; }

.hero-actions a,
.paper-button {
  display: inline-flex;
  align-items: center;
  min-height: 50px;
  padding: 0 26px;
  border: 2.5px solid var(--thermal);
  border-radius: 11px;
  color: var(--thermal);
  font-family: "Unkempt", system-ui, cursive;
  font-size: 18px;
  text-decoration: none;
  transition: transform 100ms ease, box-shadow 100ms ease;
}

.hero-start { background: var(--paper); box-shadow: 0 4px 0 var(--thermal); }
.hero-submit { background: #f4978e; box-shadow: 0 4px 0 var(--thermal); }
.hero-actions a:hover,
.paper-button:hover { transform: translateY(-2px); box-shadow: 0 6px 0 var(--thermal); }
.hero-actions a:active,
.paper-button:active { transform: translateY(4px); box-shadow: 0 0 0 var(--thermal); }

@media (max-width: 420px) {
  .hero-actions { flex-direction: column; align-self: stretch; padding: 0 18px; }
  .hero-actions a { justify-content: center; }
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(14px, 4vw, 46px);
  margin-top: clamp(44px, 7vw, 80px);
}

.receipt-preview { position: relative; margin: 0; }
.receipt-preview-left { transform: rotate(-3deg); }
.receipt-preview-center { margin-top: 18px; transform: rotate(1.6deg); }
.receipt-preview-right { transform: rotate(4deg); }

.receipt-preview canvas {
  display: block;
  width: clamp(96px, 20vw, 148px);
  height: auto;
  background: var(--paper);
  box-shadow: 0 10px 22px rgb(45 58 69 / 16%);
}

.tape {
  position: absolute;
  z-index: 2;
  top: -11px;
  left: 50%;
  width: 64px;
  height: 22px;
  margin-left: -32px;
  transform: rotate(2deg);
  opacity: 0.8;
  border-radius: 4px;
  background: var(--sky);
}

.receipt-preview-center .tape { transform: rotate(-3deg); }
.receipt-preview-right .tape { transform: rotate(1deg); }

.info-receipt {
  position: relative;
  width: min(424px, 92vw);
  margin-top: clamp(54px, 9vw, 104px);
  transform: rotate(-0.6deg);
}

.tape-wide { top: -13px; width: 104px; height: 26px; margin-left: -52px; }

.receipt-paper {
  padding: 30px clamp(20px, 5vw, 30px) 44px;
  color: var(--thermal);
  background: var(--paper);
  box-shadow: 0 14px 34px rgb(45 58 69 / 18%);
  clip-path: polygon(
    0 0, 100% 0, 100% calc(100% - 14px), 95% 100%,
    90% calc(100% - 13px), 85% 100%, 80% calc(100% - 14px), 75% 100%,
    70% calc(100% - 13px), 65% 100%, 60% calc(100% - 14px), 55% 100%,
    50% calc(100% - 13px), 45% 100%, 40% calc(100% - 14px), 35% 100%,
    30% calc(100% - 13px), 25% 100%, 20% calc(100% - 14px), 15% 100%,
    10% calc(100% - 13px), 5% 100%, 0 calc(100% - 14px)
  );
  font: 13px/1.95 "Courier Prime", monospace;
}

.receipt-header { text-align: center; }
.receipt-header h2 { margin: 0; font-size: 15px; letter-spacing: 2px; }
.receipt-header p { margin: 0; color: #4a413a; font-size: 11.5px; }
.rule { margin: 14px 0; border-top: 1.5px dashed rgb(36 31 28 / 50%); }
.receipt-paper h3 { margin: 0 0 6px; font-size: 12px; letter-spacing: 1.4px; }

code { font-family: "Courier Prime", monospace; font-weight: 700; }

.steps { margin: 0; padding: 0; list-style-position: inside; }
.steps li { margin-top: 10px; }
.steps li::marker { font-weight: 700; }
.steps p { display: inline; margin: 0; }
.wide-art { display: block; width: 100%; height: auto; }

.questions details { border-top: 1px dotted rgb(36 31 28 / 40%); }
.questions details:last-child { border-bottom: 1px dotted rgb(36 31 28 / 40%); }
.questions summary {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}
.questions summary::-webkit-details-marker { display: none; }
.questions summary::after { content: "[+]"; }
.questions details[open] summary::after { content: "[−]"; }
.questions p { margin: 0; padding-bottom: 10px; color: #4a413a; }

.receipt-signoff { margin: 18px 0 0; text-align: center; }
/* The real Code 128 SVG is injected here; it needs a clear field behind it and
   room to breathe above the torn edge. */
.barcode {
  /* Bleeds into the paper's side padding so the modules stay wide enough to
     scan; the SVG carries its own quiet zone. */
  margin: 20px calc(clamp(20px, 5vw, 30px) * -1) 4px;
  color: var(--thermal);
}

.barcode svg { display: block; width: 100%; height: auto; }

.site-footer { padding: clamp(48px, 7vw, 86px) 20px 28px; color: var(--soft); text-align: center; }
.site-footer p { max-width: 520px; margin: 0 auto; font-size: 14px; font-weight: 500; line-height: 1.6; text-wrap: pretty; }
.site-footer p span { color: var(--accent-dark); }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; margin-top: 20px; font: 700 13px/1 "Courier Prime", monospace; }
.site-footer nav a { color: inherit; }
.site-footer nav a:hover { color: var(--accent-dark); }

@media (max-width: 480px) {
  .page-shell { padding-inline: 12px; }
  .hack-club-mark { margin-bottom: -14px; }
  .gallery { flex-wrap: nowrap; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  body.disco-lights { animation: none; }

  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ---------- submit form ----------
   Ported from the "Receipt Submit Form" design: two panes in one card, the POS
   terminal sat on a counter-blue panel beside the fields. */

.submit-page {
  --line: #dcd7ce;
  --counter: #cfe2f3;
  --accent: #f4978e;
}

.submit-mark { display: block; width: fit-content; padding: 16px 0 0 18px; line-height: 0; }
.submit-mark img { width: clamp(120px, 14vw, 158px); height: auto; }

.submit-stage { display: flex; justify-content: center; padding: clamp(10px, 3vw, 28px) 20px 60px; }

.submit-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  width: min(940px, 100%);
  overflow: hidden;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 22px 54px rgb(45 58 69 / 14%);
}

/* ---- left pane ---- */

.showcase { display: flex; flex-direction: column; background: var(--counter); }

.showcase-terminal {
  display: flex;
  flex: 1 1 auto;
  align-items: stretch;
  justify-content: center;
  min-height: clamp(280px, 32vw, 340px);
  overflow: hidden;
}
.showcase-terminal pos-terminal { flex: 1 1 auto; width: 100%; }

.showcase-line {
  flex: 0 0 auto;
  margin: 0;
  padding: clamp(16px, 2.4vw, 24px) clamp(22px, 3vw, 30px) clamp(20px, 3vw, 28px);
  color: #243642;
  font-family: "Unkempt", system-ui, cursive;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.25;
  text-wrap: balance;
}

/* ---- right pane ---- */

.submit-main { padding: clamp(26px, 4vw, 42px) clamp(22px, 4vw, 40px) clamp(28px, 4vw, 38px); }

.submit-main h1 {
  margin: 0;
  font-family: "Unkempt", system-ui, cursive;
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.8px;
  text-align: left;
}

.lede { margin: 22px 0 0; color: var(--soft); font-size: 15px; line-height: 1.65; text-wrap: pretty; }

.notice {
  margin: 22px 0 0;
  padding: 12px 15px;
  border-radius: 12px;
  background: rgb(154 208 236 / 26%);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
}
.notice[data-tone="bad"] { background: rgb(184 83 74 / 10%); color: var(--accent-dark); font-weight: 700; }

/* ---- fields ---- */

.fields { display: flex; flex-direction: column; gap: 22px; margin-top: clamp(22px, 3vw, 30px); }
.field { display: flex; flex-direction: column; gap: 8px; }

.field label,
.field-title { font-size: 15px; font-weight: 700; }
.field small { color: var(--soft); font-size: 14px; font-weight: 500; }

.field input[type="url"],
.field textarea,
.field select {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}

.field input[type="url"],
.field select { min-height: 52px; padding: 0 16px; }
.field textarea { padding: 14px 16px; line-height: 1.6; resize: vertical; }
.field select { padding-right: 44px; font-weight: 500; cursor: pointer; appearance: none; }

.field input:hover,
.field textarea:hover,
.field select:hover { border-color: #c2bcb2; }
.field input:focus,
.field textarea:focus,
.field select:focus { border-color: var(--ink); }

.field input::placeholder,
.field textarea::placeholder { color: #9aa6af; }

/* Chevron drawn as a rotated corner rather than a background image, so it
   inherits colour and never blurs. */
.select-wrap { position: relative; }
.select-chevron {
  position: absolute;
  top: 50%;
  right: 18px;
  width: 9px;
  height: 9px;
  margin-top: -5px;
  border-right: 2px solid var(--soft);
  border-bottom: 2px solid var(--soft);
  transform: rotate(45deg);
  pointer-events: none;
}

/* ---- dropzone ---- */

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 32px 20px;
  border: 1.5px dashed #c8c2b8;
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  text-align: center;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.dropzone:hover { border-color: var(--ink); background: #faf8f4; }
.dropzone[data-state="over"] { border-color: var(--ink); background: #f2f8fb; }
.dropzone[data-state="bad"] { border-color: var(--accent-dark); background: rgb(184 83 74 / 6%); }

.dropzone-arrow { color: var(--soft); font-size: 22px; line-height: 1; }
.dropzone-title { font-size: 16px; font-weight: 700; }
.dropzone-hint { color: var(--soft); font-size: 14px; font-weight: 500; }

.dropfile {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.dropfile img {
  display: block;
  width: 76px;
  max-height: 150px;
  height: auto;
  border-radius: 4px;
  background: #fff;
  box-shadow: 0 4px 12px rgb(45 58 69 / 16%);
  object-fit: cover;
  object-position: top;
  image-rendering: pixelated;
}
.dropfile-meta { flex: 1; min-width: 0; }
.dropfile-name { font-size: 15px; font-weight: 700; overflow-wrap: anywhere; }
.dropfile-size { margin-top: 2px; color: var(--soft); font-size: 14px; font-weight: 500; }

.link-button {
  margin-top: 6px;
  padding: 0;
  border: none;
  background: none;
  color: var(--accent-dark);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.link-button:hover { color: var(--ink); }

/* ---- actions ---- */

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: clamp(26px, 3vw, 34px); }

.chunky {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 30px;
  border: 2.5px solid var(--ink);
  border-radius: 12px;
  background: #fffdf8;
  color: var(--ink);
  font-family: "Unkempt", system-ui, cursive;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--ink);
  transition: transform 100ms ease, box-shadow 100ms ease;
}
.chunky-primary { background: var(--accent); }
.chunky:hover { transform: translateY(-1px); box-shadow: 0 5px 0 var(--ink); }
.chunky:active { transform: translateY(4px); box-shadow: 0 0 0 var(--ink); }
.chunky:disabled { opacity: 0.55; cursor: not-allowed; transform: none; box-shadow: 0 4px 0 var(--ink); }

.submit-page button:focus-visible,
.submit-page input:focus-visible,
.submit-page select:focus-visible,
.submit-page textarea:focus-visible,
.submit-page a:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }

@media (max-width: 480px) {
  .actions { flex-direction: column; align-items: stretch; }
}

/* ---------- bonus: thermal printer prize ---------- */

.bonus {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: stretch;
  width: min(470px, 92vw);
  margin-top: clamp(48px, 8vw, 90px);
  overflow: hidden;
  border: 2.5px solid var(--thermal);
  border-radius: 16px;
  background: var(--paper);
  box-shadow: 0 6px 0 var(--thermal), 0 18px 34px rgb(45 58 69 / 14%);
  transform: rotate(-1deg);
}

/* Tinted panel, same idea as the submit form's counter, with a perforated
   edge so the card reads as something you tear along. */
.bonus-art {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px clamp(16px, 3.5vw, 22px);
  border-right: 2.5px dashed var(--thermal);
  background: rgb(154 208 236 / 34%);
}

/* Sized by width so a replacement photo of any aspect ratio still fits. */
.cat-printer {
  display: block;
  width: clamp(92px, 20vw, 116px);
  height: auto;
  max-height: 150px;
  object-fit: contain;
}

.bonus-copy {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: clamp(18px, 4vw, 24px) clamp(18px, 4vw, 24px);
}

.bonus-copy h2 {
  align-self: flex-start;
  margin: 0;
  padding: 4px 11px;
  border: 2px solid var(--thermal);
  border-radius: 999px;
  background: #f4978e;
  color: var(--thermal);
  font: 700 11px/1 "Courier Prime", monospace;
  letter-spacing: 2.2px;
}

.bonus-copy p {
  margin: 0;
  color: var(--thermal);
  font: 13px/1.8 "Courier Prime", monospace;
  text-wrap: pretty;
}

@media (max-width: 420px) {
  .bonus { grid-template-columns: 1fr; text-align: center; }
  .bonus-art { border-right: 0; border-bottom: 2.5px dashed var(--thermal); }
  .bonus-copy { align-items: center; }
  .bonus-copy h2 { align-self: center; }
}

/* ---------- scroll cue ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Fixed, so it is guaranteed to sit in the first viewport whatever height the
   hero ends up. It removes itself once you have started scrolling. */
.scroll-cue {
  position: fixed;
  z-index: 4;
  bottom: 20px;
  left: 50%;
  display: block;
  color: var(--thermal);
  text-decoration: none;
  transform: translateX(-50%);
  transition: opacity 260ms ease, transform 260ms ease;
}

.scroll-cue-tab {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 2.5px solid var(--thermal);
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 3px 0 var(--thermal);
  animation: scroll-cue-bob 2s ease-in-out infinite;
}

.scroll-cue-tab svg { width: 19px; height: 19px; }

.scroll-cue:hover .scroll-cue-tab { box-shadow: 0 5px 0 var(--thermal); transform: translateY(-2px); }
.scroll-cue:active .scroll-cue-tab { box-shadow: 0 0 0 var(--thermal); transform: translateY(3px); }
.scroll-cue:focus-visible { outline: 3px solid var(--sky); outline-offset: 6px; border-radius: 12px; }

@keyframes scroll-cue-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* Set once the page has been scrolled; it has done its job by then. */
.scroll-cue[data-hidden] {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(10px);
}

/* Short viewports (landscape phones) have no room for it. */
@media (max-height: 560px) {
  .scroll-cue { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-cue-tab { animation: none; }
}

/* ---------- gallery ---------- */

.gallery-intro { display: flex; flex-direction: column; align-items: center; margin-top: clamp(48px, 8vw, 84px); }
.gallery-intro code { color: var(--accent-dark); }

.gallery-status { margin: 48px 0 0; color: var(--soft); font: 700 14px/1.6 "Courier Prime", monospace; text-align: center; }

.wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(230px, 100%), 1fr));
  align-items: start;
  gap: clamp(36px, 5vw, 56px) clamp(20px, 3vw, 36px);
  width: min(1120px, 100%);
  margin: clamp(48px, 7vw, 76px) 0 0;
  padding: 0;
  list-style: none;
}

.wall-item { display: flex; flex-direction: column; align-items: center; scroll-margin-top: 40px; }

.wall-art {
  position: relative;
  display: block;
  width: min(230px, 100%);
  transform: rotate(var(--tilt, 0deg));
  transition: transform 140ms ease;
}
.wall-art:hover,
.wall-art:focus-visible { transform: rotate(0deg) translateY(-4px); }
.wall-item.is-linked .wall-art { outline: 3px solid #f4978e; outline-offset: 6px; }

.wall-art img,
.wall-paper {
  display: block;
  width: 100%;
  height: auto;
  background: var(--paper);
  box-shadow: 0 10px 22px rgb(45 58 69 / 16%);
  image-rendering: pixelated;
}

.wall-paper {
  display: grid;
  place-items: center;
  aspect-ratio: 384 / 700;
  padding: 18px;
  color: var(--soft);
  font: 700 13px/1.5 "Courier Prime", monospace;
  text-align: center;
  overflow-wrap: anywhere;
  animation: wall-printing 1.2s ease-in-out infinite alternate;
}
.wall-paper-error { color: var(--accent-dark); animation: none; }

@keyframes wall-printing { from { opacity: 0.55; } to { opacity: 1; } }

.wall-caption {
  max-width: 100%;
  margin: 20px 0 0;
  color: var(--thermal);
  font-family: "Unkempt", cursive;
  font-size: 19px;
  overflow-wrap: anywhere;
  text-align: center;
}
.wall-caption a { text-decoration-thickness: 2px; text-underline-offset: 3px; }

.wall-code { margin-top: 4px; color: var(--soft); font: 700 12px/1.4 "Courier Prime", monospace; }

/* Off-screen, not display:none, so fonts and canvas behave as they would in
   the editor. */
.render-frame { position: fixed; top: 0; left: -10000px; width: 400px; height: 200px; border: 0; visibility: hidden; }

.hero-gallery { margin-top: 16px; color: var(--soft); font: 700 14px/1.4 "Courier Prime", monospace; text-underline-offset: 3px; }