/* Palette lifted from the original: black backdrop, pen base #0400ff,
   and the magenta the escape gradient starts at. */
:root {
  --bg: #000000;
  --ink: #ece8f4;
  --dim: #6b6680;
  --line: #1d1b2a;
  --panel: rgba(8, 7, 14, 0.82);
  --blue: #0400ff;
  --magenta: #ff2bd6;

  --display: "Bahnschrift", "Avenir Next Condensed", "Arial Narrow", "Roboto Condensed", "Helvetica Neue", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 3px;
}

/* ---------- Menu ---------- */

.menu {
  min-height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 2rem;
  padding: clamp(1.25rem, 4vw, 3rem);
}

.menu[hidden] { display: none; }

.menu-head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  gap: 2rem;
}

.title {
  margin: 0;
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 700;
  text-transform: uppercase;
  font-size: clamp(3.5rem, 12vw, 9rem);
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.lede {
  margin: 0 0 0.35em;
  max-width: 34ch;
  color: var(--dim);
}

.gpu-error {
  margin: 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--magenta);
  color: var(--magenta);
}

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  align-content: center;
}

.card {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0.6rem;
  width: 100%;
  text-align: left;
  transform: rotate(0deg) scale(1);
  transition: transform 220ms ease;
}

.card-canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  background: #000;
  image-rendering: auto;
}

.card-name {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.card-formula {
  color: var(--dim);
  white-space: pre-wrap;
  min-width: 0;
}

.card:hover,
.card:focus-visible {
  transform: scale(1.06);
  animation: wobble 900ms ease-in-out infinite;
}

.card:hover .card-name,
.card:focus-visible .card-name {
  color: var(--magenta);
}

/* The original rocked hovered buttons between 88° and 92°. */
@keyframes wobble {
  0%   { transform: scale(1.06) rotate(0deg); }
  25%  { transform: scale(1.06) rotate(2deg); }
  75%  { transform: scale(1.06) rotate(-2deg); }
  100% { transform: scale(1.06) rotate(0deg); }
}

.menu-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--dim);
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

/* ---------- Viewer ---------- */

body.viewing { overflow: hidden; }

.viewer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

.viewer[hidden] { display: none; }

.view {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

.view.dragging { cursor: grabbing; }

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  padding-top: max(0.75rem, env(safe-area-inset-top));
}

.set-name {
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

/* Julia's parameter, next to the set name so it survives a screenshot. */
.set-c {
  color: var(--dim);
  overflow-wrap: anywhere;
}

.set-c[hidden] { display: none; }

.btn {
  padding: 0.45rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.btn:hover { border-color: var(--dim); }

.btn-accent {
  border-color: var(--magenta);
  color: var(--magenta);
}

.btn-accent:hover {
  background: var(--magenta);
  color: #000;
}

/* Way back to the portal. Fixed, so it shows in the menu and over the viewer.
   The viewer is positioned but has no z-index, so any z-index wins over it.
   The fixed width keeps the narrow-screen control offset below predictable. */
.portal-link {
  position: fixed;
  top: max(0.75rem, env(safe-area-inset-top));
  right: max(0.75rem, env(safe-area-inset-right));
  z-index: 2;
  min-width: 5.5rem;
  text-align: center;
  color: var(--ink);
  text-decoration: none;
}

.portal-link:hover { border-color: var(--dim); color: var(--ink); }

.hud {
  position: absolute;
  left: 0.75rem;
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  padding: 0.6rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  display: grid;
  gap: 0.15rem;
  max-width: min(calc(100vw - 1.5rem), 52ch);
}

.hud-row { white-space: normal; overflow-wrap: anywhere; }
.hud-c { font-size: 1.1rem; word-break: break-all; max-width: 44ch; }
.hud-k { color: var(--dim); display: inline-block; min-width: 4ch; }
.hud-dim { color: var(--dim); }

.hud-bookmarks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.35rem;
}

.hud-bookmarks:empty { display: none; }

/* Colourway chips: each group is its name with the chips underneath. */
.palette-groups { display: grid; gap: 0.3rem; margin-top: 0.35rem; }
.palette-group { display: grid; gap: 0.1rem; }
.palette-group-name { color: var(--dim); }
.palette-chips { display: flex; flex-wrap: wrap; gap: 0.15rem 0.5rem; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.1rem 0.4rem 0.1rem 0.25rem;
  color: var(--dim);
  border: 1px solid transparent;
  border-radius: 999px;
}

.chip-swatch {
  width: 1.6rem;
  height: 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.chip:hover { color: var(--ink); border-color: var(--dim); }
.chip[aria-pressed="true"] { color: var(--ink); border-color: var(--magenta); }

/* The coordinate and zoom lines open the go-to form. */
.hud-edit {
  text-align: left;
  border-bottom: 1px dotted transparent;
  cursor: text;
}

.hud-edit:hover { border-color: var(--dim); }

.goto,
.julia {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

.goto[hidden],
.julia[hidden] { display: none; }

/* Julia's C: two inputs and the named parameters from the original. */
.julia .hud-bookmarks { margin-top: 0.15rem; }
.julia .goto-error:empty { display: none; }

.goto-row {
  display: grid;
  grid-template-columns: 4ch 1fr;
  align-items: center;
  gap: 0.4rem;
}

.goto-in {
  font: inherit;
  color: var(--ink);
  background: #000;
  border: 1px solid var(--line);
  padding: 0.3rem 0.45rem;
  min-width: 0;
  width: 100%;
}

.goto-in:focus { outline: none; border-color: var(--magenta); }
.goto-in::placeholder { color: var(--dim); }

.goto-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.15rem;
}

.goto-error { color: var(--magenta); }

.bookmark {
  color: var(--dim);
  border-bottom: 1px dotted var(--dim);
}

.bookmark:hover { color: var(--magenta); border-color: var(--magenta); }

.help {
  position: absolute;
  right: 0.75rem;
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  margin: 0;
  color: var(--dim);
  text-align: right;
}

/* Control bar: iteration detail down/up and screenshot. Same on every device. */

.controls {
  position: absolute;
  right: max(0.75rem, env(safe-area-inset-right));
  bottom: calc(max(0.75rem, env(safe-area-inset-bottom)) + 2rem);
  display: flex;
  gap: 0.5rem;
}

.cbtn {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--dim);
  border-radius: 50%;
  backdrop-filter: blur(6px);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.cbtn-accent { border-color: var(--magenta); color: var(--magenta); }
.cbtn:hover { border-color: var(--ink); }
.cbtn:active, .cbtn-accent:hover { background: var(--magenta); border-color: var(--magenta); color: #000; }

@media (pointer: coarse) {
  .help { display: none; }
  .controls { bottom: max(0.75rem, env(safe-area-inset-bottom)); }
}

/* Narrow screens: the HUD owns the bottom, so the controls join the top bar. */
@media (max-width: 720px) {
  .help { display: none; }
  .controls {
    top: max(0.75rem, env(safe-area-inset-top));
    bottom: auto;
  }
  /* Up here the controls share the top-right corner with the portal link, so
     they sit one button width plus a gap to its left. */
  body.viewing .controls {
    right: calc(max(0.75rem, env(safe-area-inset-right)) + 5.5rem + 0.5rem);
  }
  .cbtn { width: 2.5rem; height: 2.5rem; font-size: 1rem; }
  .cbtn svg { width: 18px; height: 18px; }
  .set-name { font-size: 1rem; }
  .hud { max-width: calc(100vw - 1.5rem); }
  .hud-c { font-size: 0.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover, .card:focus-visible { animation: none; transform: scale(1.03); }
}