/* Manual modal (the-manual SESSION-03 CP4).
 *
 * z-index 50 — sits UNDER the CRT overlay layers (55–62 in styles/crt.css)
 * so scanlines/grain/vignette visibly render over the modal, and OVER the
 * console (z 30 in styles/components.css) so the reader is fully covered.
 *
 * Mounts into #portrait-frame as a sibling of #app-root. Portrait: near
 * full-frame inset panel with 12px margins, header/body/footer column.
 * Wide: centered panel max-width 1040px, two-pane grid — persistent TOC
 * rail (260px) + scrollable content pane.
 *
 * Aesthetic mirrors mocks/tutorial.html + mocks/wide/tutorial.html for the
 * eyebrow / accent-glow header idiom.
 *
 * All colors come from tokens defined in styles/base.css — no new hex
 * literals introduced.
 */

.manual-backdrop {
  position: absolute;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.72);
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 12px;
  animation: manual-fade-in 120ms ease-out;
}

.manual-backdrop[hidden] {
  display: none;
}

@keyframes manual-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.manual-modal {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  width: 100%;
  height: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--accent);
  box-shadow: 0 0 24px rgba(0, 0, 0, 0.6), 0 0 8px var(--accent);
  color: var(--text-primary);
  overflow: hidden;
  outline: none;
}

.manual-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-panel-elevated);
  border-bottom: 1px solid var(--accent);
  text-align: center;
}

.manual-eyebrow {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.manual-title-slot {
  font-size: 14px;
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.manual-controls {
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
}

.manual-controls > * {
  min-height: 44px;
}

.manual-body {
  overflow-y: auto;
  padding: 16px 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-panel);
}

.manual-body::-webkit-scrollbar { width: 4px; }
.manual-body::-webkit-scrollbar-thumb { background: var(--accent); }
.manual-body::-webkit-scrollbar-track { background: var(--bg-panel); }

.manual-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.manual-notice {
  padding: 24px 12px;
  text-align: center;
  color: var(--warning);
  border: 1px solid var(--warning);
  background: rgba(232, 99, 42, 0.08);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 11px;
}

/* ─── Table of contents ───────────────────────────────────────── */

.manual-toc {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.manual-chapter {
  border: 1px solid var(--border-dim);
  padding: 12px 14px;
  background: var(--bg-base);
}

.manual-chapter-title {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  text-shadow: 0 0 6px var(--accent);
  margin: 0 0 10px;
}

.manual-group {
  margin-top: 8px;
}

.manual-group-title {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin: 12px 0 6px;
}

.manual-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
}

.manual-toc-list li {
  padding: 0;
}

/* ─── Section ─────────────────────────────────────────────────── */

.manual-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.manual-section-title {
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent);
  margin: 0;
}

.manual-paragraph {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.manual-see-also {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--border-dim);
}

.manual-see-also-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-right: 4px;
}

/* ─── Wide layout ─────────────────────────────────────────────── */

@media (min-width: 900px) and (min-aspect-ratio: 1/1) {
  .manual-backdrop {
    padding: 32px;
    align-items: center;
    justify-content: center;
  }

  .manual-modal {
    width: 100%;
    max-width: 1040px;
    max-height: min(880px, calc(100vh - 64px));
    height: auto;
    grid-template-rows: auto 1fr;
  }

  html[data-layout="wide"] .manual-body {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0;
    padding: 0;
    overflow: hidden;
  }

  html[data-layout="wide"] .manual-view {
    display: contents;
  }

  html[data-layout="wide"] .manual-toc {
    grid-column: 1;
    grid-row: 1;
    border-right: 1px solid var(--border-dim);
    padding: 16px 14px;
    overflow-y: auto;
    background: var(--bg-panel-elevated);
    gap: 12px;
  }

  html[data-layout="wide"] .manual-section {
    grid-column: 2;
    grid-row: 1;
    padding: 20px 24px;
    overflow-y: auto;
  }

  html[data-layout="wide"] .manual-notice {
    grid-column: 1 / -1;
    grid-row: 1;
    align-self: center;
    justify-self: center;
  }
}

/* ─── Reduced motion ─────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .manual-backdrop {
    animation: none;
  }
}