:root {
  color-scheme: dark;
  --ink: #f2efe9;
  --ink-dim: #a7a49e;
  --paper: #12100f;
  --card: #1c1a18;
  --line: #2f2b28;
  --accent: #e4b363;
  --accent-ink: #1a1512;
  --danger: #e2725b;
  --radius: 14px;
}

* { box-sizing: border-box; }

/* `hidden` has to beat the display rules below, or hidden panels still lay out. */
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 0 4rem;
  background:
    radial-gradient(120% 60% at 50% 0%, #241f1b 0%, var(--paper) 62%) no-repeat,
    var(--paper);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100vh;
}

main, .masthead, footer {
  max-width: 940px;
  margin: 0 auto;
  padding-inline: 20px;
}

/* ------------------------------------------------------------- masthead */

.masthead {
  padding-block: clamp(2.5rem, 7vw, 4.5rem) 2rem;
  text-align: center;
}

.masthead h1 {
  margin: 0 0 .4rem;
  font: 400 clamp(2.1rem, 6vw, 3.4rem)/1.05 Georgia, "Times New Roman", serif;
  letter-spacing: -0.02em;
}

.masthead p {
  margin: 0;
  color: var(--ink-dim);
  font-size: clamp(.95rem, 2.4vw, 1.05rem);
}

/* ------------------------------------------------------------- panel */

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 1.6rem);
  display: grid;
  gap: 1rem;
}

.dropzone {
  border: 1px dashed #4a433c;
  border-radius: calc(var(--radius) - 4px);
  background: #191715;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragging {
  border-color: var(--accent);
  background: #1f1c19;
  outline: none;
}

.dropzone.has-subject { padding: .75rem; text-align: left; cursor: default; }
.dropzone.has-subject .dropzone-empty { display: none; }

.dropzone-empty { display: grid; gap: .35rem; justify-items: center; }
.dropzone-empty .ghost { margin-top: .5rem; }
.dropzone-icon { font-size: 1.8rem; }

.muted { color: var(--ink-dim); font-size: .875rem; }

/* ------------------------------------------------------------- photo library */

.library-panel { display: grid; gap: .7rem; }

.library {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: .5rem;
}

.library-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  background: #0d0c0b;
}

.library-item img { width: 100%; height: 100%; object-fit: cover; display: block; }

.library-item .remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  padding: 0;
  line-height: 20px;
  font-size: 15px;
  background: rgba(10, 9, 8, .72);
  color: #fff;
  border-color: rgba(255, 255, 255, .22);
  opacity: 0;
  transition: opacity .12s;
}

.library-item:hover .remove,
.library-item .remove:focus-visible { opacity: 1; }

/* Touch devices get no hover, so the control has to stay put. */
@media (hover: none) {
  .library-item .remove { opacity: 1; }
}

.library-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  flex-wrap: wrap;
}

.library-bar-actions { display: flex; gap: .4rem; }

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

button {
  font: inherit;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .08s, background .15s, border-color .15s;
}

button:active { transform: translateY(1px); }

.primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
  letter-spacing: .01em;
  padding: .85rem 1.4rem;
  font-size: 1.05rem;
}

.primary:hover:not(:disabled) { background: #eec27a; }
.primary:disabled { opacity: .45; cursor: not-allowed; }

.ghost {
  background: transparent;
  color: var(--ink-dim);
  border-color: var(--line);
  padding: .35rem .8rem;
  font-size: .85rem;
}

.ghost:hover { color: var(--ink); border-color: #4a433c; }

.status { margin: 0; min-height: 1.25rem; color: var(--ink-dim); font-size: .9rem; text-align: center; }
.status.error { color: var(--danger); }

/* ------------------------------------------------------------- stage */

.stage { margin-top: 1.5rem; display: grid; gap: .9rem; }

.frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #0b0a09;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .55);
}

#canvas { display: block; width: 100%; height: auto; }

.stage-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem 1rem;
  justify-content: space-between;
}

.credit { margin: 0; color: var(--ink-dim); font-size: .8rem; flex: 1 1 260px; }
.credit a { color: var(--ink-dim); }

/* ------------------------------------------------------------- tweaks */

.tweaks {
  margin-top: 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .9rem 1.1rem;
}

.tweaks summary { cursor: pointer; font-weight: 600; }
.tweaks[open] summary { margin-bottom: 1rem; }

.tweak-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

.tweak-grid label { display: grid; gap: .35rem; font-size: .9rem; }
.tweak-grid output { font-size: .8rem; }
.tweak-grid datalist { display: none; }
.tweak-grid label span em { color: var(--ink-dim); font-style: normal; font-size: .8rem; }
.tweak-grid label span em::before { content: " — "; }

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

.check { display: flex !important; align-items: center; gap: .5rem; }
.check input { accent-color: var(--accent); width: 1rem; height: 1rem; }

.keyrow {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  font-size: .9rem;
  padding-top: .4rem;
  border-top: 1px solid var(--line);
}

.swatch {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: transparent;
}

input[type="color"] {
  width: 44px;
  height: 30px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #191715;
  cursor: pointer;
}

/* ------------------------------------------------------------- footer */

footer {
  margin-top: 2.5rem;
  color: var(--ink-dim);
  font-size: .8rem;
  text-align: center;
}

footer a { color: var(--ink-dim); }

@media (max-width: 480px) {
  .stage-actions { flex-direction: column; align-items: stretch; }
  .stage-actions .primary { width: 100%; }
}