/* Refracta - dark, glassy, keeps the canvas the hero. */

* { box-sizing: border-box; }

:root {
  --bg: #0b0e14;
  --panel: #12161f;
  --panel-2: #1a1f2b;
  --line: #232a38;
  --text: #e8ecf4;
  --dim: #8b93a7;
  --accent: #7dd3fc;
  --accent-2: #38bdf8;
  --good: #4ade80;
  --bad: #f87171;
}

html, body {
  margin: 0;
  background: radial-gradient(1200px 700px at 75% -10%, #131a2a 0%, var(--bg) 55%);
  color: var(--text);
  font: 14px/1.45 -apple-system, "Segoe UI", system-ui, sans-serif;
}

.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-variant-numeric: tabular-nums; }
.dim { color: var(--dim); }
.small { font-size: 12px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */
header {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 14px 22px 8px;
}
.brand h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #e8ecf4, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand p { margin: 0; color: var(--dim); font-size: 12.5px; }
.rx-box {
  margin-left: auto;
  text-align: right;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(20, 26, 38, 0.7);
}
#rx-readout { font-size: 19px; color: var(--accent); }
#rx-detail { font-size: 12px; }
#rx-detail b { color: var(--text); font-weight: 600; }

button.ghost, .filebtn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 9px;
  padding: 7px 12px;
  cursor: pointer;
  font: inherit;
}
button.ghost:hover, .filebtn:hover { border-color: var(--accent-2); color: var(--accent); }
.wide { width: 100%; margin-top: 8px; display: inline-block; text-align: center; }

/* ---------- presets ---------- */
#presets {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 22px 12px;
  scrollbar-width: thin;
}
.chip {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--dim);
  border-radius: 999px;
  padding: 6px 13px;
  font: 12.5px/1 inherit;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.chip:hover { color: var(--text); border-color: var(--accent-2); }
.chip.active { background: rgba(56, 189, 248, 0.14); color: var(--accent); border-color: var(--accent-2); }

/* ---------- layout ---------- */
main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 18px;
  padding: 0 22px 26px;
}
@media (max-width: 980px) { main { grid-template-columns: 1fr; } }

#stage {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}
#view { display: block; width: 100%; height: auto; }
#scene-desc { margin: 10px 2px 0; font-size: 12.5px; }

/* wipe */
#divider {
  position: absolute;
  top: 0;
  width: 2px;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 12px rgba(125, 211, 252, 0.8);
  cursor: ew-resize;
  z-index: 3;
}
#divider .knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  color: #0b0e14;
  border-radius: 999px;
  padding: 7px 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: -1px;
  cursor: ew-resize;
  user-select: none;
}
.side-label {
  position: absolute;
  top: 12px;
  font-size: 11px;
  letter-spacing: 1.5px;
  padding: 4px 9px;
  border-radius: 6px;
  background: rgba(8, 10, 16, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.12);
  z-index: 2;
  pointer-events: none;
}
.side-label.left { left: 12px; color: var(--good); }
.side-label.right { right: 12px; color: var(--bad); }
.badge {
  position: absolute;
  bottom: 10px;
  right: 12px;
  background: rgba(8, 10, 16, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px 9px;
  border-radius: 6px;
  font-size: 11.5px;
  color: var(--dim);
  z-index: 2;
  pointer-events: none;
}
.badge.scene { right: auto; left: 12px; color: var(--text); }

/* ---------- panel ---------- */
#panel details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  padding: 4px 14px 12px;
}
#panel summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--dim);
  padding: 9px 0 7px;
  user-select: none;
}
#panel summary:hover { color: var(--text); }

#scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.card {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: 9px;
  border: 1.5px solid var(--line);
  background-color: var(--panel-2);
  background-size: cover;
  background-position: center;
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.1s;
}
.card:hover { border-color: var(--accent-2); transform: translateY(-1px); }
.card.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25); }
.card-label {
  position: absolute;
  inset: auto 0 0 0;
  font-size: 10px;
  padding: 8px 4px 4px;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.82));
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card-action { display: grid; place-items: center; }
.card-action .card-label { position: static; background: none; font-size: 12px; padding: 0; white-space: normal; }

/* sliders */
.slider { margin: 9px 0; }
.slider-head { display: flex; justify-content: space-between; font-size: 12.5px; margin-bottom: 3px; }
.slider-head label { color: var(--dim); }
.slider-head .val { color: var(--accent); }
input[type="range"] {
  width: 100%;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--line);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: 2.5px solid #0b0e14;
  box-shadow: 0 0 0 1.5px var(--accent-2);
  cursor: grab;
}
.row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-top: 8px; font-size: 12.5px; color: var(--dim); }
.row label { display: flex; gap: 6px; align-items: center; }
.row input[type="number"] {
  width: 62px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 6px;
  font: inherit;
}
select {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font: inherit;
}

#psf-canvas { display: block; margin: 2px auto 6px; background: rgba(0, 0, 0, 0.35); border-radius: 8px; }
#psf-detail { text-align: center; font-size: 11.5px; }
.footer-links { text-align: center; margin-top: 4px; }

/* validation */
#validate-panel { padding: 10px 26px 40px; max-width: 1000px; margin: 0 auto; }
#validate-panel table { border-collapse: collapse; width: 100%; margin: 12px 0; }
#validate-panel th, #validate-panel td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; font-size: 13px; }
#validate-panel tr.pass td:last-child { color: var(--good); }
#validate-panel tr.fail td:last-child { color: var(--bad); }
.tol { color: var(--dim); font-size: 11px; }
.validate-strip { display: flex; gap: 10px; margin: 14px 0 22px; flex-wrap: wrap; }
.validate-strip figure { margin: 0; }
.validate-strip figcaption { font-size: 11px; color: var(--dim); text-align: center; margin-top: 4px; }
.validate-strip img, .validate-strip canvas { border-radius: 6px; border: 1px solid var(--line); display: block; }

/* toasts & dialog */
#toasts { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 50; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
  background: rgba(18, 22, 32, 0.95);
  border: 1px solid var(--accent-2);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  max-width: 460px;
  text-align: center;
  opacity: 0;
  translate: 0 8px;
  transition: all 0.3s;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}
.toast.show { opacity: 1; translate: 0 0; }
.toast b { color: var(--accent); }

dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  max-width: 620px;
  padding: 22px 26px;
  line-height: 1.55;
}
dialog::backdrop { background: rgba(5, 7, 12, 0.7); backdrop-filter: blur(3px); }
dialog h2 { margin-top: 0; }
dialog code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; font-size: 12.5px; }