/* THE CONTROL ROOM — application shell layout.
   One CSS grid, named areas; panel dimensions are theme tokens. */

#app {
  display: grid;
  height: 100vh;
  grid-template-columns: var(--lesson-w) minmax(0, 1fr) var(--controls-w);
  grid-template-rows: var(--header-h) var(--annun-h) minmax(180px, 34%) minmax(0, 1fr) var(--status-h);
  grid-template-areas:
    "header header header"
    "lesson annun  controls"
    "lesson mimic  controls"
    "lesson charts controls"
    "lesson status status";
}

#app.lesson-closed { grid-template-columns: 0 minmax(0, 1fr) var(--controls-w); }
#app.lesson-closed #lessonArea { display: none; }

/* Exam mode: the lesson panel is centered and widened; sim panels hidden. */
#app.quiz-full {
  grid-template-columns: minmax(0, 1fr) min(calc(var(--lesson-w) * 1.5), 92vw) minmax(0, 1fr);
  grid-template-areas:
    "header header header"
    ".      lesson .     "
    ".      lesson .     "
    ".      lesson .     "
    ".      lesson .     ";
}
#app.quiz-full #annunArea, #app.quiz-full #mimicArea, #app.quiz-full #chartArea,
#app.quiz-full #controlsArea, #app.quiz-full #statusBar { display: none; }

/* Mimic collapsed (lesson wants charts tall) */
#app.mimic-hidden { grid-template-rows: var(--header-h) var(--annun-h) 0 minmax(0, 1fr) var(--status-h); }
#app.mimic-hidden #mimicArea { display: none; }

[data-area="header"] { grid-area: header; }
[data-area="lesson"] { grid-area: lesson; }
[data-area="annun"]  { grid-area: annun; }
[data-area="mimic"]  { grid-area: mimic; }
[data-area="charts"] { grid-area: charts; }
[data-area="controls"] { grid-area: controls; }
[data-area="status"] { grid-area: status; }

#header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
  overflow-x: auto;
}
.brand { display: flex; flex-direction: column; line-height: 1.15; margin-right: 6px; }
/* The brand is a link home to titanmiller.net; keep its panel-label look. */
a.brand { text-decoration: none; color: inherit; }
a.brand:hover .brand-mark { text-shadow: 0 0 14px var(--phosphor-glow); }
a.brand:hover .brand-sub { color: var(--ink-dim); }
.brand-mark {
  font-family: var(--mono);
  font-size: calc(14px * var(--fs, 1));
  letter-spacing: 0.22em;
  color: var(--phosphor);
  text-shadow: 0 0 8px var(--phosphor-glow);
}
.brand-sub { font-size: calc(9.5px * var(--fs, 1)); letter-spacing: 0.12em; color: var(--ink-faint); text-transform: uppercase; }
.header-spacer { flex: 1 1 0; min-width: 4px; }
.ts-wrap { display: flex; align-items: center; gap: 6px; }
.ts-label { font-size: calc(9px * var(--fs, 1)); letter-spacing: 0.14em; color: var(--annun-amber); }
.license-tag {
  font-family: var(--mono);
  font-size: calc(10.5px * var(--fs, 1));
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 2px 7px;
}
.license-tag.licensed { color: var(--annun-amber); border-color: var(--annun-amber); }
.sb-item { display: inline-flex; align-items: center; gap: 5px; }
.ro-item { display: inline-flex; align-items: baseline; gap: 4px; margin-right: 10px; }
.ro-label { font-size: calc(10px * var(--fs, 1)); color: var(--ink-faint); letter-spacing: 0.08em; }
.ctl-row.readouts { flex-wrap: wrap; }

#lessonArea {
  background: var(--bg-panel);
  border-right: 1px solid var(--hairline);
  overflow-y: auto;
  overscroll-behavior: contain;
}

#annunArea {
  background: var(--bg-inset);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

#mimicArea {
  position: relative;
  background: var(--bg);
  border-bottom: 1px solid var(--hairline-soft);
  overflow: hidden;
}
#mimicCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
#mimicOverlay { position: absolute; inset: 0; pointer-events: none; }
#mimicOverlay > * { pointer-events: auto; }

#chartArea {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg);
}
#chartTabs {
  display: flex;
  gap: 2px;
  padding: 4px 8px 0;
  flex: 0 0 auto;
  overflow-x: auto;
  align-items: center;
}
.chart-tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 5px 5px 0 0;
  color: var(--ink-dim);
  font-size: calc(12px * var(--fs, 1));
  letter-spacing: 0.06em;
  padding: 3px 10px;
  cursor: pointer;
}
.chart-tab:hover { color: var(--ink); }
.chart-tab.active {
  color: var(--phosphor);
  border-color: var(--hairline);
  background: var(--bg-panel);
}
.chart-tab.locked { color: var(--locked); cursor: default; }
.chart-window-sel { margin-left: auto; display: inline-flex; gap: 2px; }
.chart-window-sel button {
  background: transparent;
  border: 1px solid var(--hairline-soft);
  border-radius: 3px;
  color: var(--ink-faint);
  font-size: calc(10.5px * var(--fs, 1));
  padding: 1px 6px;
  cursor: pointer;
}
.chart-window-sel button.active { color: var(--phosphor); border-color: var(--phosphor); }
#chartCanvas { flex: 1 1 auto; min-height: 0; width: 100%; }
#metricsBar {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 3px 10px;
  font-size: calc(12px * var(--fs, 1));
  color: var(--ink-dim);
  border-top: 1px solid var(--hairline-soft);
  min-height: 22px;
}

#controlsArea {
  background: var(--bg-panel);
  border-left: 1px solid var(--hairline);
  overflow-y: auto;
  overscroll-behavior: contain;
}

#statusBar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 12px;
  background: var(--bg-panel);
  border-top: 1px solid var(--hairline);
  font-size: calc(12px * var(--fs, 1));
  font-family: var(--mono);
  color: var(--ink-dim);
  white-space: nowrap;
  overflow-x: auto;
}

/* --- Boot screen ----------------------------------------------------------- */

#bootCheck {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
}
.boot-card {
  text-align: center;
  color: var(--ink-dim);
  font-size: calc(15px * var(--fs, 1));
  max-width: 480px;
  padding: 24px;
}
.boot-mark {
  font-family: var(--mono);
  font-size: calc(22px * var(--fs, 1));
  letter-spacing: 0.35em;
  color: var(--phosphor);
  text-shadow: 0 0 12px var(--phosphor-glow);
  margin-bottom: 14px;
}
.boot-error {
  margin: 40vh auto 0;
  max-width: 480px;
  text-align: center;
  color: var(--ink);
}

/* Static crawlable content shown under the boot card; removed with #bootCheck
   at the end of boot(). Scrollable in case boot hangs and someone reads it. */
#bootCheck { overflow-y: auto; align-content: safe center; }
.boot-seo {
  max-width: 620px;
  padding: 8px 24px 48px;
  color: var(--ink-dim);
  font-size: calc(13px * var(--fs, 1));
  line-height: 1.55;
}
.boot-seo h1, .boot-seo h2 {
  color: var(--ink);
  font-size: calc(14px * var(--fs, 1));
  margin: 18px 0 6px;
}
.boot-seo p, .boot-seo ol { margin: 6px 0; }
.boot-seo ol { padding-left: 2em; }
.boot-seo li { margin: 2px 0; }
.boot-seo strong { color: var(--ink); font-weight: 600; }
.boot-seo a { color: var(--phosphor); }

/* --- Responsive ------------------------------------------------------------ */

@media (max-width: 1280px) {
  :root { --lesson-w: 340px; --controls-w: 280px; --annun-h: 116px; }
}

@media (max-width: 1080px) {
  #app {
    grid-template-columns: 0 minmax(0, 1fr) var(--controls-w);
    grid-template-areas:
      "header header header"
      "annun  annun  controls"
      "mimic  mimic  controls"
      "charts charts controls"
      "status status status";
  }
  /* Lesson panel becomes an overlay drawer. */
  #lessonArea {
    position: fixed;
    left: 0;
    top: var(--header-h);
    bottom: 0;
    width: min(390px, 88vw);
    z-index: 30;
    box-shadow: 8px 0 32px #000a;
    transform: translateX(-102%);
    transition: transform 0.2s ease;
  }
  #app.lesson-open-mobile #lessonArea { transform: none; }
}