/*
 * Stars menu system.
 * Adapted from ZENITH UI Kit by cotara_gold (CC BY 4.0).
 * https://cotara-gold.itch.io/zenith-premium-minimalist-html5-ui-kit
 */

:root {
  --stars-bg: #06060e;
  --stars-accent: #e6efff;
  --stars-active: #aac8ff;
  --stars-dim: rgba(230, 239, 255, 0.4);
  --stars-border: rgba(230, 239, 255, 0.15);
  --stars-font: 'Inter', sans-serif;
  --stars-ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

#titleScreen {
  position: fixed;
  inset: 0;
  background-color: #0a0d1a;
  z-index: 1000;
  user-select: none;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: opacity 0.8s var(--stars-ease-out-expo);
  overflow: hidden;
}

#titleScreen.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Stage wraps the visible title layout — used for the full-stage "tear" glitch.
   Kept as a plain positioning container (no flex) so absolute-positioned children
   like .title-telemetry aren't affected by flex layout quirks. */
.title-stage {
  position: absolute;
  inset: 0;
}

@keyframes stars-fade-in {
  0% { opacity: 0; transform: translateY(15px); }
  100% { opacity: 1; transform: translateY(0); }
}

.title-content {
  position: absolute;
  top: 0;
  bottom: 0;
  left: max(15vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: stars-fade-in 1.8s var(--stars-ease-out-expo) forwards;
}

.title-header {
  margin-bottom: 5rem;
}

.title-main {
  font-size: clamp(3.5rem, 6vw, 5rem);
  font-weight: 200;
  letter-spacing: 0.15em;
  color: rgba(233, 237, 247, 0);
  line-height: 1;
  margin: 0;
  position: relative;
  display: inline-block;
  transition: letter-spacing 900ms cubic-bezier(0.22, 1, 0.36, 1),
              color 900ms ease;
}

/* Final reveal state uses the original wordmark tracking (0.25em) rather
   than the design artifact's 0.35em — David wants original dimensions. */
.title-main.wordmark-ready {
  letter-spacing: 0.25em;
  color: rgba(233, 237, 247, 1);
}

/* Compression state — subtle vertical squash, scanlines overlay visible.
   JS owns transform/scanline animation timing; CSS supplies the look. */
.title-main.wordmark-compressing {
  transition: transform 55ms linear, filter 55ms linear;
}

.title-main-body {
  display: inline-block;
  position: relative;
}

.title-letter {
  display: inline-block;
}

/* Chroma split overlays — JS toggles .chroma-on; pseudo-content reads from
   data-text so bit-rot letter swaps are mirrored into the chroma layers. */
.title-main-body::before,
.title-main-body::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  letter-spacing: inherit;
  font-weight: inherit;
  opacity: 0;
  mix-blend-mode: screen;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 40ms linear;
}
.title-main-body::before {
  color: rgba(255, 64, 64, 0.65);
  transform: translateX(var(--chroma-red-x, -2px));
}
.title-main-body::after {
  color: rgba(64, 240, 255, 0.65);
  transform: translateX(var(--chroma-cyan-x, 2px));
}
.title-main-body.chroma-on::before,
.title-main-body.chroma-on::after {
  opacity: 1;
}

/* Scanlines overlay — JS toggles .scanlines-on when compressing. The lines
   drift upward via background-position animation while active. */
.title-scanlines {
  position: absolute;
  inset: -6% -2%;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.72) 2px,
    rgba(0, 0, 0, 0.72) 3px
  );
  background-size: 100% 3px;
  opacity: 0;
  transition: opacity 80ms linear;
  mix-blend-mode: multiply;
}
.title-main-body.scanlines-on .title-scanlines {
  opacity: 0.95;
  animation: scanline-drift 520ms linear infinite;
}

@keyframes scanline-drift {
  from { background-position-y: 0; }
  to { background-position-y: -3px; }
}

/* Telemetry — bottom-right cluster: timestamp + signal-interpretation stamp underneath. */
.title-telemetry {
  position: absolute;
  bottom: 24px;
  right: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 3px;
  font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  animation: stars-fade-in 1.4s 0.8s var(--stars-ease-out-expo) forwards;
}

.telemetry-ts {
  font-size: 8px;
  letter-spacing: 0.22em;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.22);
  font-variant-numeric: tabular-nums;
}

/* Per-character model: each glyph span carries its own inline color (alpha).
   No CSS color transition — transitions are intentionally binary (snap), so
   the flicker reads as signal noise rather than a deliberate fade effect. */
.telemetry-stamp {
  font-size: 5px;
  letter-spacing: 0.18em;
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.telemetry-stamp-char {
  display: inline-block;
  margin-right: 0.25em;
}

.telemetry-stamp-char:last-child {
  margin-right: 0;
}

/* Tear effect — each clipped stage clone gets a .title-stage-clip-top / -bottom. */
.title-stage.tearing .title-stage-original {
  visibility: hidden;
}
.title-stage-clone {
  position: absolute;
  inset: 0;
  pointer-events: none;
  will-change: transform, clip-path;
}
.title-tear-seam {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(180, 220, 255, 0.35), rgba(255, 255, 255, 0.08));
}

.title-nav {
  display: flex;
  flex-direction: column;
  width: max-content;
}

.title-menu-item {
  background: none;
  border: none;
  color: var(--stars-accent);
  font-family: var(--stars-font);
  font-size: 1.25rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.4;
  padding: 0.75rem 0;
  line-height: 1;
  cursor: pointer;
  text-align: left;
  transition: opacity 0.4s ease, color 0.4s ease;
}

.title-menu-item span {
  display: inline-block;
  transition: transform 0.4s var(--stars-ease-out-expo);
}

.title-menu-item:hover:not(:disabled),
.title-menu-item:focus:not(:disabled) {
  opacity: 1;
  color: var(--stars-active);
  outline: none;
}

.title-menu-item:hover:not(:disabled) span,
.title-menu-item:focus:not(:disabled) span {
  transform: translateX(8px);
}

.title-menu-item:disabled {
  cursor: default;
  opacity: 0.2;
}

/* ============================================================
 * Settings modal
 * ============================================================ */

#settingsModal {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 14, 0.75);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  user-select: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--stars-ease-out-expo);
}

#settingsModal.open {
  opacity: 1;
  pointer-events: auto;
}

.settings-dialog {
  width: 800px;
  max-width: 95vw;
  background-color: var(--stars-bg);
  border: 1px solid var(--stars-border);
  transform: translateY(15px);
  transition: transform 0.5s var(--stars-ease-out-expo);
}

#settingsModal.open .settings-dialog {
  transform: translateY(0);
}

.settings-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--stars-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.settings-header-title {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.settings-header-status {
  font-size: 0.75rem;
  color: var(--stars-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.settings-content {
  display: flex;
  min-height: 260px;
}

.settings-column {
  flex: 1;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.settings-column:first-child {
  border-right: 1px solid var(--stars-border);
}

.settings-section-title {
  font-size: 0.65rem;
  color: var(--stars-dim);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.slider-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 300;
}

.slider-value {
  color: var(--stars-dim);
  font-variant-numeric: tabular-nums;
}

.settings-slider {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
  cursor: pointer;
}

.settings-slider:focus { outline: none; }

.settings-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 1px;
  background: var(--stars-border);
}
.settings-slider::-moz-range-track {
  width: 100%;
  height: 1px;
  background: var(--stars-border);
}

.settings-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 12px;
  width: 12px;
  background: var(--stars-accent);
  margin-top: -5.5px;
  transition: transform 0.2s var(--stars-ease-out-expo), background-color 0.3s ease;
}
.settings-slider::-moz-range-thumb {
  height: 12px;
  width: 12px;
  background: var(--stars-accent);
  border: none;
  border-radius: 0;
  transition: transform 0.2s var(--stars-ease-out-expo), background-color 0.3s ease;
}

.settings-slider:hover::-webkit-slider-thumb,
.settings-slider:focus::-webkit-slider-thumb {
  background: var(--stars-active);
  transform: scale(1.2);
}
.settings-slider:hover::-moz-range-thumb,
.settings-slider:focus::-moz-range-thumb {
  background: var(--stars-active);
  transform: scale(1.2);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 300;
}

/* Visually hidden but focusable — required for arrow-key / gamepad nav. */
.checkbox-label input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  border: 1px solid var(--stars-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s ease;
  flex-shrink: 0;
}

.custom-checkbox::after {
  content: '';
  width: 10px;
  height: 10px;
  background-color: var(--stars-accent);
  transform: scale(0);
  transition: transform 0.2s var(--stars-ease-out-expo), background-color 0.3s ease;
}

.checkbox-label input:checked + .custom-checkbox {
  border-color: var(--stars-dim);
}

.checkbox-label input:checked + .custom-checkbox::after {
  transform: scale(1);
}

.checkbox-label:hover .custom-checkbox,
.checkbox-label input:focus + .custom-checkbox {
  border-color: var(--stars-active);
}

.checkbox-label:hover .custom-checkbox::after,
.checkbox-label input:focus + .custom-checkbox::after {
  background-color: var(--stars-active);
}

.settings-footer {
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--stars-border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

/* Tab bar at top of settings modal */
.settings-tabs {
  display: flex;
  border-bottom: 1px solid var(--stars-border);
}
.settings-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.9rem 0;
  font-family: var(--stars-font);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(230, 239, 255, 0.5);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
  border-bottom: 1px solid transparent;
  margin-bottom: -1px;
}
.settings-tab:hover,
.settings-tab:focus-visible {
  color: var(--stars-accent);
  outline: none;
}
.settings-tab.is-active {
  color: var(--stars-accent);
  border-bottom-color: var(--stars-accent);
}

.settings-tab-pane {
  display: none;
  min-height: 260px;
}
.settings-tab-pane.is-active {
  display: flex;
}
.settings-column--wide {
  flex: 1;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.btn-settings {
  background: transparent;
  color: var(--stars-accent);
  border: 1px solid var(--stars-accent);
  padding: 0.75rem 2rem;
  font-family: var(--stars-font);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-settings:hover,
.btn-settings:focus-visible {
  background: var(--stars-active);
  color: var(--stars-bg);
  border-color: var(--stars-active);
  outline: none;
}

.btn-settings-secondary {
  padding: 0.5rem 1.25rem;
  font-size: 0.625rem;
  border-color: rgba(230, 239, 255, 0.35);
  color: rgba(230, 239, 255, 0.75);
}

/* ============================================================
 * Control bindings table
 * ============================================================ */

.control-bindings {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-family: var(--stars-font);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
}
.control-bindings th {
  text-align: left;
  padding: 6px 4px;
  color: rgba(230, 239, 255, 0.45);
  font-weight: 300;
  text-transform: uppercase;
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  border-bottom: 1px solid rgba(230, 239, 255, 0.08);
}
.control-bindings td {
  padding: 6px 4px;
  color: rgba(230, 239, 255, 0.78);
  text-transform: uppercase;
  vertical-align: middle;
}
.control-bindings td:first-child {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
}

.cb-cell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.cb-pill {
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: rgba(230, 239, 255, 0.85);
  border: 1px solid rgba(230, 239, 255, 0.28);
  padding: 3px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
}
.cb-pill:hover,
.cb-pill:focus-visible {
  border-color: var(--stars-accent);
  background: rgba(230, 239, 255, 0.06);
  outline: none;
}
.cb-pill.is-listening {
  border-color: var(--stars-active, #4da8ff);
  color: var(--stars-active, #4da8ff);
  background: rgba(77, 168, 255, 0.08);
}
.cb-add {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: rgba(230, 239, 255, 0.55);
  border: 1px dashed rgba(230, 239, 255, 0.28);
  padding: 3px 9px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.15s ease;
}
.cb-add:hover,
.cb-add:focus-visible {
  border-style: solid;
  border-color: var(--stars-accent);
  color: var(--stars-accent);
  outline: none;
}
.cb-empty {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: rgba(230, 239, 255, 0.3);
}

/* Aim stick toggle */
.control-aim-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: rgba(230, 239, 255, 0.78);
  text-transform: uppercase;
}
.aim-stick-toggle {
  display: inline-flex;
  border: 1px solid rgba(230, 239, 255, 0.28);
}
.aim-stick-btn {
  background: transparent;
  color: rgba(230, 239, 255, 0.7);
  border: none;
  padding: 5px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
}
.aim-stick-btn + .aim-stick-btn { border-left: 1px solid rgba(230, 239, 255, 0.28); }
.aim-stick-btn:hover { color: var(--stars-accent); }
.aim-stick-btn.is-active {
  background: rgba(230, 239, 255, 0.1);
  color: var(--stars-accent);
}

/* Stick sensitivity — gated edit UX */
.stick-sens-group { margin-bottom: 16px; }
.stick-sens-control {
  display: flex;
  align-items: center;
  gap: 8px;
}
.stick-sens-control .settings-slider { flex: 1; opacity: 0.45; }
.stick-sens-control.is-editing .settings-slider { opacity: 1; }
.stick-sens-btn {
  background: transparent;
  color: rgba(230, 239, 255, 0.7);
  border: 1px solid rgba(230, 239, 255, 0.28);
  padding: 4px 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
  min-width: 58px;
}
.stick-sens-btn:hover {
  border-color: var(--stars-accent);
  color: var(--stars-accent);
}
.stick-sens-control.is-editing .stick-sens-cancel { display: inline-block !important; }

.controls-footer-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

/* Rebind prompt overlay */
.rebind-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 14, 0.78);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.rebind-overlay.is-open { display: flex; }
.rebind-prompt {
  background: #0a0d18;
  border: 1px solid rgba(230, 239, 255, 0.28);
  padding: 32px 48px;
  text-align: center;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  min-width: 360px;
}
.rebind-prompt-title {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.rebind-prompt-hint {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(230, 239, 255, 0.45);
}
.rebind-prompt-conflict {
  margin-top: 14px;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgb(255, 140, 110);
  min-height: 12px;
}
.rebind-prompt-actions {
  margin-top: 18px;
  display: flex;
  justify-content: center;
}

/* ============================================================
 * Pause menu
 * ============================================================ */

#pauseModal {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 14, 0.65);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  padding-left: max(15vw, 3rem);
  z-index: 1500;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  user-select: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--stars-ease-out-expo);
}

#pauseModal.open {
  opacity: 1;
  pointer-events: auto;
}

.pause-content {
  display: flex;
  flex-direction: column;
  transform: translateY(15px);
  transition: transform 0.5s var(--stars-ease-out-expo);
}

#pauseModal.open .pause-content {
  transform: translateY(0);
}

.pause-header {
  margin-bottom: 2.5rem;
}

.pause-title {
  font-size: 2rem;
  font-weight: 200;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin: 0;
  line-height: 1;
}

.pause-nav {
  display: flex;
  flex-direction: column;
  width: max-content;
  min-width: 220px;
}

.pause-divider {
  border-top: 1px solid var(--stars-border);
  margin: 0.75rem 0;
  width: 120px;
  opacity: 0.6;
}

/* ============================================================
 * Credits modal — content-only variant of the settings dialog
 * ============================================================ */

#creditsModal {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 14, 0.75);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  user-select: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--stars-ease-out-expo);
}

#creditsModal.open {
  opacity: 1;
  pointer-events: auto;
}

.credits-dialog {
  width: 640px;
  max-width: 95vw;
  background-color: var(--stars-bg);
  border: 1px solid var(--stars-border);
  transform: translateY(15px);
  transition: transform 0.5s var(--stars-ease-out-expo);
}

#creditsModal.open .credits-dialog {
  transform: translateY(0);
}

.credits-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--stars-border);
}

.credits-header-title {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.credits-content {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.credits-section {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.credits-section-title {
  font-size: 0.65rem;
  color: var(--stars-dim);
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.credits-line {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.06em;
}

.credits-link {
  color: var(--stars-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--stars-border);
  transition: color 0.3s ease, border-color 0.3s ease;
}

.credits-link:hover,
.credits-link:focus {
  color: var(--stars-active);
  border-color: var(--stars-active);
  outline: none;
}

.credits-license {
  font-size: 0.7rem;
  color: var(--stars-dim);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-left: 0.5rem;
}

.credits-footer {
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--stars-border);
  display: flex;
  justify-content: flex-end;
}

/* ============================================================
 * Chapter select
 * ============================================================ */

#chapterSelect {
  position: fixed;
  inset: 0;
  background-color: var(--stars-bg);
  z-index: 1100;
  font-family: var(--stars-font);
  color: var(--stars-accent);
  user-select: none;
  display: flex;
  flex-direction: column;
  opacity: 1;
  transition: opacity 0.6s var(--stars-ease-out-expo);
  overflow: hidden;
}

#chapterSelect.chapter-hidden {
  opacity: 0;
  pointer-events: none;
}

.chapter-select-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2.5rem max(5vw, 3rem) 1.5rem;
  border-bottom: 1px solid var(--stars-border);
}

.chapter-select-title {
  font-size: 1.25rem;
  font-weight: 200;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  margin: 0;
  line-height: 1;
}

.chapter-back-btn {
  background: none;
  border: none;
  color: var(--stars-accent);
  font-family: var(--stars-font);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.5;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  transition: opacity 0.3s ease, color 0.3s ease;
}

.chapter-back-btn:hover,
.chapter-back-btn:focus {
  opacity: 1;
  color: var(--stars-active);
  outline: none;
}

.chapter-grid {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1.25rem;
  padding: 3rem max(12vw, 5rem);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  scroll-behavior: smooth;
  flex: 1;
}

/* Slim horizontal scrollbar, matched to Stars palette */
.chapter-grid::-webkit-scrollbar { height: 4px; }
.chapter-grid::-webkit-scrollbar-track { background: transparent; }
.chapter-grid::-webkit-scrollbar-thumb {
  background: var(--stars-border);
  border-radius: 2px;
}
.chapter-grid::-webkit-scrollbar-thumb:hover { background: var(--stars-dim); }

.chapter-card {
  flex: 0 0 200px;
  background: transparent;
  border: 1px solid var(--stars-border);
  color: var(--stars-accent);
  cursor: pointer;
  padding: 1rem 1.1rem;
  font-family: var(--stars-font);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 280px;
  scroll-snap-align: center;
  transition: border-color 0.35s var(--stars-ease-out-expo),
              transform 0.35s var(--stars-ease-out-expo),
              background-color 0.35s ease;
}

/* Reserved space for future map symbol / thumbnail / logo — takes the
 * upper portion of the card, pushing the text block toward the bottom. */
.chapter-card__icon {
  flex: 1 1 auto;
  min-height: 100px;
}

.chapter-card:hover:not(:disabled),
.chapter-card:focus:not(:disabled) {
  border-color: var(--stars-active);
  transform: translateY(-3px);
  background-color: rgba(170, 200, 255, 0.03);
  outline: none;
}

.chapter-card:disabled {
  cursor: default;
  opacity: 0.3;
}

.chapter-card__index {
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--stars-dim);
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

.chapter-card__name {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--stars-accent);
}

.chapter-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--stars-dim);
  margin-top: auto;
}

.chapter-card__meta-item {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
}

.chapter-card__meta-value {
  color: var(--stars-accent);
  font-variant-numeric: tabular-nums;
}

.chapter-card__shards {
  color: var(--stars-active);
  opacity: 0.75;
}

.chapter-status {
  padding: 0.75rem max(5vw, 3rem) 1.25rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stars-dim);
  min-height: 1.5rem;
}

/* ============================================================
 * HUD hide utility — applied to HUD header and legend when
 * "Show HUD" is off (default).
 * ============================================================ */

.hud--hidden {
  display: none !important;
}