/* Ghost Hat course player — brand system: film noir, selective illumination.
   Atmosphere lives in the room (body background layers). Panels are opaque
   surfaces above it. No effect ever sits over functional text. */

:root {
  --bg: #0a0b0e;
  --gunmetal: #0d0f12;
  --gunmetal-2: #121519;
  --platinum: #c4c9d4;
  --platinum-dim: #b3b9c4;
  --spectral: #b8c7d6;
  --brass: #d4c5a4;
  --brass-deep: #8a7355;
  --white: #f6f7f9;
  --hairline: rgba(196, 201, 212, 0.08);
  --hairline-strong: rgba(196, 201, 212, 0.16);
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --sans: 'Bricolage Grotesque', ui-sans-serif, system-ui, sans-serif;
}

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

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--platinum);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  position: relative;
}

/* The room: one brass key light raking from the upper left, edges falling to
   black. Background layers only — every panel above this is opaque. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 12% -10%, rgba(212, 197, 164, 0.07), transparent 55%),
    radial-gradient(140% 120% at 50% 50%, transparent 60%, rgba(0, 0, 0, 0.5) 100%);
}

.player {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
}

/* ---- header ---- */
.player-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--hairline-strong);
  background: var(--gunmetal);
  font-family: var(--mono);
  font-size: 14px;
}
.crumbs { color: var(--platinum-dim); letter-spacing: 0.04em; }
.crumbs a { color: var(--platinum-dim); text-decoration: none; }
.crumbs a:hover, .crumbs a:focus-visible { color: var(--platinum); }
.crumbs .here { color: var(--platinum); }
.agent-badge {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--brass);
  letter-spacing: 0.08em;
}
.agent-badge .dot {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--gunmetal-2);
  border: 1px solid var(--brass-deep);
  display: grid; place-items: center;
  color: var(--brass);
  font-size: 14px;
}

/* ---- main grid ---- */
.player-main {
  display: grid;
  grid-template-columns: minmax(360px, 480px) 1fr;
  min-height: 0;
}

/* ---- narration column ---- */
.narration {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  padding: 2rem 2rem 6.5rem;
  border-right: 1px solid var(--hairline-strong);
  background: var(--gunmetal);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--brass);
  margin-bottom: 1.25rem;
}
.narration-text {
  font-size: 19px;
  line-height: 1.65;
  color: var(--platinum);
  max-width: 38rem;
}
.narration-text p + p { margin-top: 1em; }
.narration-text em { color: var(--spectral); font-style: italic; }
.narration-text code {
  font-family: var(--mono);
  font-size: 16px;
  background: var(--gunmetal-2);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
}
button {
  font-family: var(--mono);
  font-size: 15px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--platinum);
  padding: 0.6rem 1rem;
}
button:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
.continue {
  background: var(--brass);
  border-color: var(--brass);
  color: #16130c;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.6rem 1.6rem;
}
.continue:hover { background: var(--white); border-color: var(--white); }
.back { color: var(--platinum-dim); }
.back:hover, .back:focus-visible { color: var(--platinum); }
.back[disabled] { opacity: 1; color: var(--platinum-dim); border-color: var(--hairline); cursor: default; }

/* ---- ask ---- */
.ask {
  margin-top: 2.25rem;
  border-top: 1px solid var(--hairline);
  padding-top: 1.5rem;
}
.ask label {
  display: block;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--platinum-dim);
  margin-bottom: 0.6rem;
}
.ask textarea {
  width: 100%;
  min-height: 3.2rem;
  resize: vertical;
  background: var(--bg);
  color: var(--platinum);
  border: 1px solid var(--hairline-strong);
  border-radius: 5px;
  padding: 0.6rem 0.75rem;
  font-family: var(--sans);
  font-size: 16px;
}
.ask textarea:focus-visible { outline: 2px solid var(--brass); outline-offset: 1px; }
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.chip {
  font-size: 14px;
  color: var(--spectral);
  border: 1px solid var(--hairline-strong);
  background: var(--gunmetal-2);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
}
.chip:hover, .chip:focus-visible { border-color: var(--spectral); color: var(--white); }
.answer-card {
  margin-top: 1.25rem;
  background: var(--gunmetal-2);
  border: 1px solid var(--hairline-strong);
  border-left: 2px solid var(--brass);
  border-radius: 6px;
  padding: 1rem 1.25rem;
}
.answer-card .q {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--brass);
  margin-bottom: 0.5rem;
}
.answer-card .a { font-size: 16px; color: var(--platinum); }

/* ---- visual panel ---- */
.visual {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 2rem;
}
.panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--gunmetal);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.panel-head {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--platinum-dim);
  letter-spacing: 0.06em;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  gap: 1rem;
}
.panel-head .file { color: var(--spectral); }
.panel-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 1.1rem;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.55;
  color: var(--platinum);
  white-space: pre;
}
.panel-body .placeholder {
  font-family: var(--sans);
  color: var(--platinum-dim);
  white-space: normal;
  max-width: 28rem;
}
.code-line {
  display: flex;
  gap: 1.1rem;
  padding: 0 0.5rem;
  border-left: 2px solid transparent;
}
.code-line .ln {
  color: var(--platinum-dim);
  min-width: 2.6em;
  text-align: right;
  user-select: none;
  flex-shrink: 0;
}
.code-line .lt { flex: 1; }
.code-line.lit {
  background: var(--gunmetal-2);
  border-left-color: var(--brass);
}
.code-line.lit .ln { color: var(--brass); }

/* ---- progress ring ---- */
.ring-wrap {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--gunmetal);
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  padding: 0.4rem 1rem 0.4rem 0.5rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}
.ring-wrap svg { display: block; }
.ring-track { stroke: var(--hairline-strong); }
.ring-fill {
  stroke: var(--brass);
  transition: stroke-dashoffset 0.4s ease;
}
.ring-label {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--platinum-dim);
  letter-spacing: 0.05em;
}
.ring-label b { color: var(--brass); font-weight: 500; }

@media (max-width: 900px) {
  .player { height: auto; }
  .player-main { grid-template-columns: 1fr; }
  .narration { border-right: 0; border-bottom: 1px solid var(--hairline-strong); }
  .visual { min-height: 50vh; }
}

@media (prefers-reduced-motion: reduce) {
  .ring-fill { transition: none; }
}