:root {
  --void: #0A0A0A;
  --panel: #141414;
  --seam: #262626;
  --silver-line: #3A3A3A;
  --bone: #E8E4DE;
  --liner: #6B6560;
  --brass: #C4A265;
  --silver: #C9CCCE;
  --oxide: #8B3A3A;
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

* { box-sizing: border-box; border-radius: 2px; }

html, body { margin: 0; padding: 0; background: var(--void); }

body {
  color: var(--bone);
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

.page { max-width: 1180px; margin: 0 auto; padding: 0 20px 40px; }

/* ---------- masthead ---------- */
#masthead { border-bottom: 1px solid var(--seam); padding: 56px 0 40px; margin-bottom: 8px; }

#wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 300;
  font-size: clamp(42px, 8vw, 96px);
  letter-spacing: -0.02em;
  line-height: 0.92;
  color: var(--bone);
  text-transform: uppercase;
}

#tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--liner);
  margin-top: 22px;
}

#rule-row { display: flex; gap: 26px; margin-top: 26px; flex-wrap: wrap; }

.signal-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver);
  border: 1px solid var(--silver-line);
  padding: 7px 13px;
  background-color: #141414;
  background-image: var(--grain);
  background-blend-mode: soft-light;
  background-size: 180px 180px;
}

/* ---------- section labels ---------- */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--liner);
  margin: 34px 0 14px 2px;
}
.section-label .num { color: var(--brass); margin-right: 10px; }

/* ---------- frosted mercury surfaces ---------- */
.frosted {
  background-color: #171717;
  background-image:
    radial-gradient(130% 100% at 16% -10%,
      rgba(216,220,223,0.115) 0%,
      rgba(216,220,223,0.028) 34%,
      rgba(0,0,0,0.26) 72%,
      rgba(216,220,223,0.03) 100%),
    repeating-linear-gradient(93deg,
      rgba(255,255,255,0.016) 0px, rgba(255,255,255,0.016) 1px,
      rgba(0,0,0,0.022) 1px, rgba(0,0,0,0.022) 2px),
    var(--grain);
  background-size: 100% 100%, 2px 2px, 180px 180px;
  background-blend-mode: normal, soft-light, overlay;
  border: 1px solid var(--silver-line);
  box-shadow:
    inset 0 1px 0 rgba(232,228,222,0.075),
    inset 0 -1px 0 rgba(0,0,0,0.55),
    inset 0 0 70px rgba(0,0,0,0.28);
}

/* ---------- input row ---------- */
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: stretch; }

.panel { padding: 12px; }

.take-panel { display: flex; flex-direction: column; }
.take-panel #readouts { margin-top: auto; }

#drop {
  display: flex; align-items: center; justify-content: center;
  position: relative; height: 420px; overflow: hidden;
  border: 1px dashed var(--silver-line);
  background: #111;
  cursor: pointer;
}
#drop.dragover { border-color: var(--brass); }
#preview { display: none; width: 100%; height: 100%; object-fit: contain; }
#drop.loaded #preview { display: block; }
#drop.loaded .drop-hint { display: none; }

.drop-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--liner); text-align: center; line-height: 2;
}
.drop-hint span { color: #4a4a4a; }

.slider-row {
  display: flex; align-items: center; gap: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--liner); margin: 14px 2px 10px;
}
.slider-row output { color: var(--silver); margin-left: auto; letter-spacing: 0.1em; }

input[type=range] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 2px; background: var(--silver-line);
  outline: none; margin: 6px 0 4px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--silver); border: 1px solid #0a0a0a; cursor: pointer;
}

#go {
  display: block; width: 100%; margin-top: 8px;
  background: var(--silver); color: #0A0A0A;
  border: 1px solid var(--silver);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.28em; text-transform: uppercase;
  padding: 16px 24px; font-weight: 500; cursor: pointer;
  transition: opacity .4s ease, background .4s ease;
}
#go:hover:not(:disabled) { background: var(--brass); border-color: var(--brass); }
#go:disabled { opacity: 0.35; cursor: default; }
#go.busy { opacity: 0.6; }

/* ---------- the take ---------- */
.take-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--liner); margin: 2px 2px 10px;
}
.dl { color: var(--silver); text-decoration: none; font-size: 14px; }

#audio {
  width: 100%; height: 54px;
  filter: invert(0.92) hue-rotate(180deg) saturate(0.5);
  margin-bottom: 14px;
}

.volume-warning {
  display: flex; align-items: flex-start; gap: 10px;
  border-left: 2px solid var(--oxide);
  background: rgba(139,58,58,0.16);
  padding: 11px 13px;
  margin: 0 0 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; line-height: 1.65;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #cfa39b;
}
.volume-warning .w-mark {
  color: #a8433f;
  font-size: 13px; line-height: 1.15;
  letter-spacing: 0;
  font-weight: 500;
}

#readouts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--silver-line);
  border: 1px solid var(--silver-line);
}
.readout {
  background: #161616;
  background-image: var(--grain);
  background-blend-mode: soft-light;
  background-size: 180px 180px;
  padding: 14px 16px;
}
.readout .k {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--liner); margin-bottom: 8px;
}
.readout .v {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px; color: var(--silver); letter-spacing: 0.02em;
}

/* ---------- analysis sheet ---------- */
#sheet { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--void); }
.plate { width: 100%; height: auto; display: block; }

/* ---------- examples ---------- */
#examples-note {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--liner); margin: 34px 0 12px 2px;
}
#plates { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
#plates button {
  padding: 0; border: 1px solid var(--seam); background: #11100f;
  cursor: pointer; overflow: hidden; position: relative; aspect-ratio: 4 / 3;
}
#plates img { width: 100%; height: 100%; object-fit: cover; display: block; opacity: 0.85; transition: opacity .4s ease; }
#plates button:hover img { opacity: 1; }
#plates button.active { border-color: var(--brass); }
#plates button span {
  position: absolute; left: 10px; bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--bone); background: rgba(10,10,10,0.72); padding: 3px 6px;
}

/* ---------- footer ---------- */
#colophon {
  border-top: 1px solid var(--seam);
  margin-top: 56px; padding: 30px 0 60px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--liner);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}

@media (max-width: 860px) {
  .input-row { grid-template-columns: 1fr; }
  #plates { grid-template-columns: repeat(2, 1fr); }
  #sheet { grid-template-columns: 1fr; }
}