:root {
  --prologue-bg: #000000;
  --prologue-panel: rgba(15, 17, 21, 0.72);
  --prologue-border: rgba(42, 49, 64, 0.75);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body.prologue-page {
  background: #000000;
  overflow: hidden;
}

/* Starfield: hidden until first dust */
body.prologue-page[data-dust="0"] .prologue-bg {
  opacity: 0;
  pointer-events: none;
}

.prologue-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 520px at 18% 12%, rgba(94, 234, 212, 0.09), transparent 55%),
    radial-gradient(720px 460px at 88% 22%, rgba(94, 234, 212, 0.06), transparent 60%),
    radial-gradient(900px 620px at 50% 110%, rgba(94, 234, 212, 0.05), transparent 65%),
    url("../img/prologue_stars.svg");
  background-size: cover, cover, cover, cover;
  background-position: center, center, center, center;
  filter: saturate(1.05) contrast(1.05);
  opacity: 0.95;
  transition: opacity 0.6s ease;
}

.prologue-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(1100px 700px at 50% 40%, transparent 35%, rgba(0,0,0,0.55) 70%, rgba(0,0,0,0.9) 100%);
}

.prologue-shell {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 0.75rem;
  gap: 0.75rem;
}

body.prologue-page[data-dust="0"] .prologue-shell {
  padding: 0;
}

/* Match main app topbar */
.prologue-topbar {
  height: var(--topbar-h, 52px);
  padding: 0 0.75rem;
  display: none;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 30;
}

.prologue-topbar:not([hidden]) {
  display: flex;
}

.prologue-brand-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  white-space: nowrap;
}

.prologue-topbar-center {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
}

.prologue-topbar-middle {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-width: 0;
  max-width: 520px;
  margin: 0 auto;
}

.prologue-topbar-search-wrap {
  width: 100%;
  max-width: 420px;
}

.prologue-search-input {
  width: 100%;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  font-size: 0.85rem;
}

.prologue-topbar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.prologue-body-row {
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 0.75rem;
  align-items: stretch;
  grid-template-columns: 1fr;
  grid-template-areas:
    "main"
    "log";
}

.prologue-log {
  grid-area: log;
}

body.prologue-page[data-dust-min="1"] .prologue-body-row {
  grid-template-columns: 1fr minmax(260px, 340px);
  grid-template-areas:
    "main log";
}

body.prologue-page[data-dust-min="20"] .prologue-body-row {
  grid-template-columns: var(--sidebar-w, 240px) 1fr minmax(260px, 340px);
  grid-template-areas:
    "side main log";
}

body.prologue-page[data-dust="0"] .prologue-body-row {
  min-height: 100dvh;
}

/* Sidebar shell (minimal text) */
.prologue-sidebar {
  grid-area: side;
  display: none;
  width: var(--sidebar-w, 240px);
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--surface);
  overflow-y: auto;
}

.prologue-sidebar:not([hidden]) {
  display: block;
}

.prologue-sidebar-inner {
  padding: 1rem;
}

.prologue-sidebar-placeholder {
  display: block;
  height: 0.9rem;
  margin: 0.35rem 0;
  border-radius: 4px;
  background: rgba(139, 147, 167, 0.12);
  border: 1px solid transparent;
}

.prologue-center-wrap {
  grid-area: main;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 0;
  min-height: 0;
}

body.prologue-page[data-dust="0"] .prologue-center-wrap {
  justify-content: center;
  align-items: center;
  min-height: 100dvh;
}

.prologue-sidebar-backdrop {
  display: none;
}

.prologue-stage {
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  min-height: 200px;
}

body.prologue-page[data-dust-min="1"] .prologue-stage {
  border-color: var(--prologue-border);
  background: var(--prologue-panel);
  backdrop-filter: blur(10px);
}

.stage-inner {
  display: grid;
  place-items: center;
  gap: 0.9rem;
  padding: 1.5rem;
  text-align: center;
}

.dust-btn {
  appearance: none;
  border: 1px solid rgba(94, 234, 212, 0.22);
  background: radial-gradient(380px 180px at 50% 40%, rgba(94, 234, 212, 0.10), rgba(0,0,0,0) 55%),
    rgba(0,0,0,0.18);
  border-radius: 999px;
  padding: 0.95rem 1.15rem;
  cursor: pointer;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  transform: translateZ(0);
  user-select: none;
}

.dust-btn:hover {
  border-color: rgba(94, 234, 212, 0.5);
}

.dust-btn:active {
  transform: scale(0.98);
}

.dust-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, #ffffff, #5eead4 55%, rgba(94,234,212,0.15) 100%);
  box-shadow: 0 0 18px rgba(94, 234, 212, 0.25);
}

.dust-label {
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: rgba(232, 234, 239, 0.9);
}

.stage-hint {
  max-width: 55ch;
}

.prologue-log.panel {
  background: var(--prologue-panel);
  border-color: var(--prologue-border);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.log-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.log-k {
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
}

.log-v {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.log-pill {
  font-size: 0.8rem;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(94, 234, 212, 0.28);
  background: rgba(94, 234, 212, 0.08);
  color: rgba(94, 234, 212, 0.95);
  font-weight: 800;
}

.divider {
  height: 1px;
  background: var(--prologue-border);
  margin: 0.85rem 0;
}

.narration {
  flex: 1;
  min-height: 120px;
  overflow: auto;
  padding-right: 0.25rem;
}

.narration p {
  margin: 0 0 0.75rem;
  color: rgba(232, 234, 239, 0.92);
}

.prologue-footer-actions {
  display: grid;
  gap: 0.5rem;
}

.prologue-footer-actions .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: grayscale(100%);
  background: var(--muted);
  color: var(--bg);
  border-color: var(--border);
}

.prologue-footer-actions .btn:disabled:hover {
  filter: grayscale(100%);
  background: var(--muted);
  border-color: var(--border);
}

.fine {
  font-size: 0.9rem;
}

/* Fake UI pieces */
.prologue-fake-ui-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
}

.prologue-mini-stat {
  height: 52px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.12);
}

.prologue-fake-panel {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 0.75rem;
  min-height: 72px;
}

.prologue-fake-panel-bar {
  height: 10px;
  border-radius: 6px;
  background: linear-gradient(90deg, rgba(94, 234, 212, 0.15), rgba(94, 234, 212, 0.05));
  max-width: 70%;
}

.prologue-fake-ui-70 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prologue-mini-pill {
  height: 36px;
  border-radius: 999px;
  border: 1px dashed var(--border);
  background: rgba(0, 0, 0, 0.1);
}

.prologue-site-footer {
  text-align: center;
  padding: 0.5rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

@media (max-width: 940px) {
  .prologue-sidebar-toggle {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
  }

  body.prologue-page[data-dust-min="1"] .prologue-body-row,
  body.prologue-page[data-dust-min="20"] .prologue-body-row {
    display: flex;
    flex-direction: column;
    grid-template-columns: unset;
    grid-template-areas: unset;
  }

  body.prologue-page[data-dust-min="1"] .prologue-body-row .prologue-center-wrap {
    order: 1;
  }

  body.prologue-page[data-dust-min="1"] .prologue-body-row .prologue-log {
    order: 2;
  }

  body.prologue-page[data-dust-min="20"] .prologue-body-row .prologue-sidebar {
    order: 3;
  }

  .prologue-sidebar:not([hidden]) {
    position: fixed;
    left: 0;
    top: var(--topbar-h, 52px);
    bottom: 0;
    z-index: 20;
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.35);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }

  .prologue-sidebar.open {
    transform: translateX(0);
  }

  .prologue-sidebar-backdrop:not([hidden]) {
    display: block;
    position: fixed;
    inset: 0;
    top: var(--topbar-h, 52px);
    background: rgba(0, 0, 0, 0.45);
    z-index: 15;
  }

  body.prologue-page {
    overflow: auto;
  }
}

@media (min-width: 941px) {
  .prologue-sidebar-toggle {
    display: none !important;
  }
}