/* Hue — specimen-sheet UI. Warm near-black, bone mono type, hairlines. */

:root {
  --ink: #141412;
  --ink-raise: #1b1b18;
  --bone: #e8e4dc;
  --bone-dim: #97928a;
  --line: #2c2c27;
  --line-strong: #4a4a42;
  --danger: #c96a5a;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  background: var(--ink);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.45;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ---------- type ---------- */

h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h2 {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bone-dim);
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

h2 output { color: var(--bone); letter-spacing: 0.05em; }

.meta {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bone-dim);
}

/* ---------- header ---------- */

#masthead {
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--line);
  flex: none;
}

.brand-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.actions { display: flex; gap: 8px; }

/* ---------- buttons ---------- */

button {
  font: inherit;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bone);
  background: transparent;
  border: 1px solid var(--line-strong);
  padding: 6px 12px;
  cursor: pointer;
}

button:hover { background: var(--bone); color: var(--ink); border-color: var(--bone); }

button:disabled { opacity: 0.4; pointer-events: none; }

button.primary { width: 100%; padding: 10px; margin-top: 8px; }

button.ghost { border-color: var(--line); color: var(--bone-dim); }
button.ghost:hover { border-color: var(--bone); color: var(--ink); background: var(--bone); }

/* ---------- layout ---------- */

main {
  flex: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 0;
}

#panel {
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 18px 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  scrollbar-width: thin;
}

#stage {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

#previewWrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 26px;
  min-height: 0;
}

#preview {
  display: block;
  outline: 1px solid var(--line);
}

#status {
  flex: none;
  text-align: center;
  padding: 0 12px 14px;
  min-height: 26px;
}

/* ---------- colors ---------- */

#colorList { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.color-row {
  display: grid;
  grid-template-columns: 16px 14px 96px 1fr auto;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  padding: 6px 8px;
  background: var(--ink-raise);
}

.color-row.invalid { border-color: var(--danger); }

.color-row .name {
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--bone-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.color-row input[type="text"] {
  font: inherit;
  font-size: 11px;
  color: var(--bone);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 2px 0;
  width: 100%;
  text-transform: uppercase;
}

.color-row input[type="text"]:focus { outline: none; border-bottom-color: var(--bone); }

.color-row .grip {
  cursor: grab;
  color: var(--bone-dim);
  letter-spacing: -1px;
  padding: 0 2px;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.color-row .grip:active { cursor: grabbing; }

.color-row .del {
  border: none;
  padding: 0 2px;
  color: var(--bone-dim);
}

.color-row .del:hover { background: transparent; color: var(--danger); }

/* ---------- type segment ---------- */

.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }

.seg button { padding: 8px 4px; border-color: var(--line); color: var(--bone-dim); }

.seg button.on {
  background: var(--bone);
  color: var(--ink);
  border-color: var(--bone);
}

.seg button:not(.on):hover { color: var(--ink); }

/* ---------- inputs ---------- */

input[type="range"] {
  width: 100%;
  accent-color: var(--bone);
  height: 18px;
}

.row { display: flex; gap: 8px; }
.row.dims { margin-top: 8px; }
.row.dims label { flex: 1; display: flex; align-items: center; gap: 8px; font-size: 10px; letter-spacing: 0.14em; color: var(--bone-dim); }

select, input[type="number"] {
  font: inherit;
  font-size: 11px;
  color: var(--bone);
  background: var(--ink-raise);
  border: 1px solid var(--line-strong);
  padding: 7px 8px;
  width: 100%;
}

input[type="number"] { text-align: right; }

input:focus, select:focus { outline: 1px solid var(--bone); outline-offset: -1px; }

.check {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  color: var(--bone-dim);
  cursor: pointer;
  padding: 2px 0 4px;
}

.check input { accent-color: var(--bone); }

/* color picker input doubles as swatch */
.color-row input[type="color"] {
  inline-size: 14px;
  block-size: 14px;
  padding: 0;
  border: 1px solid var(--line-strong);
  background: none;
}

.color-row input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-row input[type="color"]::-webkit-color-swatch { border: none; }
.color-row input[type="color"]::-moz-color-swatch { border: none; }

/* ---------- fullscreen preview ---------- */

body.fullscreen #panel, body.fullscreen #masthead, body.fullscreen #status { display: none; }
body.fullscreen #previewWrap { padding: 0; }
body.fullscreen #preview { outline: none; }

/* ---------- small screens ---------- */

@media (max-width: 820px) {
  main {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(320px, 52vh) 1fr;
    overflow: hidden;
  }
  /* Preview pinned on top; controls scroll beneath it. */
  #stage { order: -1; overflow: hidden; }
  #panel { border-right: none; border-top: 1px solid var(--line); overflow-y: auto; }
  #previewWrap { padding: 16px; }
}