/* Self-hosted IBM Plex Sans Arabic (@fontsource/ibm-plex-sans-arabic 5.3.0, SIL OFL-1.1) */
@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 400;
  src: url('/fonts/ibm-plex-sans-arabic-arabic-400-normal.woff2') format('woff2');
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC;
}

@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 600;
  src: url('/fonts/ibm-plex-sans-arabic-arabic-600-normal.woff2') format('woff2');
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC;
}

@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 700;
  src: url('/fonts/ibm-plex-sans-arabic-arabic-700-normal.woff2') format('woff2');
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC;
}

@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 400;
  src: url('/fonts/ibm-plex-sans-arabic-latin-400-normal.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 600;
  src: url('/fonts/ibm-plex-sans-arabic-latin-600-normal.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans Arabic';
  font-style: normal;
  font-display: swap;
  font-weight: 700;
  src: url('/fonts/ibm-plex-sans-arabic-latin-700-normal.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root,
:root[data-theme='dark'] {
  --ds-font-sans: 'IBM Plex Sans Arabic', 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --ds-font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ds-color-surface-canvas: #0E171B;
  --ds-color-surface-primary: #141E24;
  --ds-color-surface-elevated: #1C2930;
  --ds-color-surface-card: #1C2930;
  --ds-color-surface-subtle: #263740;
  --ds-color-surface-hud-translucent: rgba(20, 30, 36, 0.9);

  --ds-color-text-primary: #F2F5F7;
  --ds-color-text-secondary: #B8C7CE;
  --ds-color-text-on-accent: #0E171B;
  --ds-color-text-inverse: #142026;

  --ds-color-accent-primary: #5CD1E5;
  --ds-color-accent-primary-hover: #82DDF0;
  --ds-color-accent-secondary: #F4A950;

  --ds-color-border-subtle: #384C57;
  --ds-color-border-strong: #7A8E96;
  --ds-color-border-focus: #FFBD63;

  --ds-color-semantic-info-bg: #123547;
  --ds-color-semantic-info-text: #D6F0FA;
  --ds-color-semantic-warning-bg: #4A2C00;
  --ds-color-semantic-warning-text: #FFE4B8;
  --ds-color-semantic-danger-bg: #4F1616;
  --ds-color-semantic-danger-text: #FFD6D6;

  --ds-color-provenance-verified-bg: #084C38;
  --ds-color-provenance-verified-text: #E3F5EE;
  --ds-color-provenance-verified-border: #28A880;
  --ds-color-provenance-estimated-bg: #5C3200;
  --ds-color-provenance-estimated-text: #FFF0D6;
  --ds-color-provenance-estimated-border: #D98218;
  --ds-color-provenance-fictional-bg: #6E3F12;
  --ds-color-provenance-fictional-text: #FFF6E8;
  --ds-color-provenance-fictional-border: #E59849;

  --ds-text-xs-size: 0.75rem;
  --ds-text-xs-line-height: 1.5;
  --ds-text-sm-size: 0.875rem;
  --ds-text-sm-line-height: 1.6;
  --ds-text-md-size: 1rem;
  --ds-text-md-line-height: 1.7;
  --ds-text-lg-size: 1.125rem;
  --ds-text-lg-line-height: 1.6;
  --ds-text-xl-size: 1.3125rem;
  --ds-text-xl-line-height: 1.5;

  --ds-space-1: 4px;
  --ds-space-2: 8px;
  --ds-space-3: 12px;
  --ds-space-4: 16px;
  --ds-space-6: 24px;
  --ds-touch-target-min: 44px;

  --ds-radius-xs: 4px;
  --ds-radius-sm: 6px;
  --ds-radius-md: 10px;
  --ds-radius-lg: 14px;
  --ds-radius-pill: 9999px;

  --ds-elevation-sm: 0 1px 3px rgba(14, 23, 27, 0.14), 0 1px 2px rgba(14, 23, 27, 0.1);
  --ds-elevation-md: 0 4px 12px rgba(14, 23, 27, 0.18), 0 2px 4px rgba(14, 23, 27, 0.12);
  --ds-elevation-focus: 0 0 0 3px #FFBD63;

  --ds-duration-ui-fast: 150ms;
  --ds-duration-ui-normal: 250ms;
  --ds-duration-camera-handoff: 750ms;

  --ds-z-canvas: 0;
  --ds-z-hud-controls: 20;
  --ds-z-fictional-badge: 40;
  --ds-z-modal-dialog: 70;
}

:root[lang='en'] {
  --ds-text-xs-line-height: 1.4;
  --ds-text-sm-line-height: 1.45;
  --ds-text-md-line-height: 1.55;
  --ds-text-lg-line-height: 1.45;
  --ds-text-xl-line-height: 1.35;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --ds-duration-ui-fast: 0ms;
    --ds-duration-ui-normal: 0ms;
    --ds-duration-camera-handoff: 0ms;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin-block: 0;
  margin-inline: 0;
  padding-block: 0;
  padding-inline: 0;
  inline-size: 100%;
  block-size: 100%;
  background-color: var(--ds-color-surface-canvas);
  color: var(--ds-color-text-primary);
  font-family: var(--ds-font-sans);
  font-size: var(--ds-text-md-size);
  line-height: var(--ds-text-md-line-height);
  font-variant-numeric: tabular-nums;
  text-align: start;
}

.shell-root {
  display: flex;
  flex-direction: column;
  inline-size: 100%;
  min-block-size: 100dvh;
  background-color: var(--ds-color-surface-primary);
}

.shell-fictional-badge {
  position: relative;
  z-index: var(--ds-z-fictional-badge);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-2);
  padding-block: var(--ds-space-2);
  padding-inline: var(--ds-space-4);
  background-color: var(--ds-color-provenance-fictional-bg);
  color: var(--ds-color-provenance-fictional-text);
  border-block-end: 2px solid var(--ds-color-provenance-fictional-border);
  font-size: var(--ds-text-sm-size);
  line-height: var(--ds-text-sm-line-height);
}

.shell-fictional-badge-text {
  font-weight: 700;
}

.shell-fictional-badge-meta {
  padding-block: 2px;
  padding-inline: var(--ds-space-2);
  border-radius: var(--ds-radius-pill);
  border: 1px solid var(--ds-color-provenance-fictional-border);
  font-size: var(--ds-text-xs-size);
}

.shell-header {
  position: relative;
  z-index: var(--ds-z-hud-controls);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-3);
  padding-block: var(--ds-space-2);
  padding-inline: var(--ds-space-4);
  background-color: var(--ds-color-surface-elevated);
  border-block-end: 1px solid var(--ds-color-border-subtle);
}

.shell-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--ds-space-3);
}

.shell-brand-title {
  font-weight: 700;
  color: var(--ds-color-accent-primary);
  font-size: var(--ds-text-lg-size);
}

.shell-level-heading {
  margin-block: 0;
  margin-inline: 0;
  font-size: var(--ds-text-lg-size);
  line-height: var(--ds-text-lg-line-height);
  font-weight: 600;
  color: var(--ds-color-text-primary);
}

.shell-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-2);
}

.shell-breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-1);
  list-style: none;
  margin-block: 0;
  margin-inline: 0;
  padding-block: 0;
  padding-inline: 0;
}

.shell-breadcrumb-item {
  display: inline-flex;
  align-items: center;
}

.shell-breadcrumb-btn,
.shell-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: var(--ds-touch-target-min);
  min-inline-size: var(--ds-touch-target-min);
  padding-block: var(--ds-space-1);
  padding-inline: var(--ds-space-3);
  border-radius: var(--ds-radius-sm);
  border: 1px solid var(--ds-color-border-strong);
  background-color: var(--ds-color-accent-primary);
  color: var(--ds-color-text-on-accent);
  font-family: inherit;
  font-size: var(--ds-text-sm-size);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--ds-duration-ui-fast);
}

.shell-btn-secondary,
.shell-breadcrumb-btn {
  background-color: var(--ds-color-surface-subtle);
  color: var(--ds-color-text-primary);
  border-color: var(--ds-color-border-subtle);
}

.shell-breadcrumb-btn-current {
  background-color: var(--ds-color-accent-primary);
  color: var(--ds-color-text-on-accent);
  border-color: var(--ds-color-accent-primary);
  cursor: default;
}

.shell-btn:disabled,
.shell-breadcrumb-btn:disabled:not(.shell-breadcrumb-btn-current) {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (hover: hover) {
  .shell-btn:hover:not(:disabled) {
    background-color: var(--ds-color-accent-primary-hover);
  }
  .shell-btn-secondary:hover:not(:disabled),
  .shell-breadcrumb-btn:hover:not(:disabled) {
    border-color: var(--ds-color-border-strong);
  }
}

.shell-btn:focus-visible,
.shell-breadcrumb-btn:focus-visible,
.shell-webgl-canvas:focus-visible {
  outline: none;
  box-shadow: var(--ds-elevation-focus);
}

.shell-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-2);
}

.shell-step-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-2);
  padding-block: var(--ds-space-2);
  padding-inline: var(--ds-space-4);
  background-color: var(--ds-color-surface-primary);
  border-block-end: 1px solid var(--ds-color-border-subtle);
  font-size: var(--ds-text-sm-size);
  color: var(--ds-color-text-secondary);
}

.shell-stage {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-block-size: 420px;
  background-color: var(--ds-color-surface-canvas);
}

.shell-canvas-host {
  position: relative;
  z-index: var(--ds-z-canvas);
  flex: 1 1 auto;
  inline-size: 100%;
  min-block-size: 420px;
}

.shell-webgl-canvas {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  min-block-size: 420px;
  touch-action: none;
}

.shell-context-lost {
  position: absolute;
  inset-block-start: var(--ds-space-4);
  inset-inline-start: var(--ds-space-4);
  inset-inline-end: var(--ds-space-4);
  z-index: var(--ds-z-modal-dialog);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-3);
  padding-block: var(--ds-space-3);
  padding-inline: var(--ds-space-4);
  border-radius: var(--ds-radius-md);
  background-color: var(--ds-color-semantic-warning-bg);
  color: var(--ds-color-semantic-warning-text);
  border: 2px solid var(--ds-color-border-focus);
  box-shadow: var(--ds-elevation-md);
}

.shell-context-lost[hidden] {
  display: none;
}

.shell-context-lost-text {
  margin-block: 0;
  margin-inline: 0;
}

.shell-status-notice {
  position: absolute;
  inset-block-start: var(--ds-space-3);
  inset-inline-start: var(--ds-space-4);
  z-index: var(--ds-z-hud-controls);
  padding-block: var(--ds-space-2);
  padding-inline: var(--ds-space-3);
  border-radius: var(--ds-radius-sm);
  background-color: var(--ds-color-semantic-info-bg);
  color: var(--ds-color-semantic-info-text);
  border: 1px solid var(--ds-color-border-strong);
  font-size: var(--ds-text-sm-size);
}

.shell-status-notice[hidden] {
  display: none;
}

.shell-first-visit {
  position: absolute;
  inset-block-end: var(--ds-space-4);
  inset-inline-start: var(--ds-space-4);
  z-index: var(--ds-z-modal-dialog);
  max-inline-size: 540px;
  padding-block: var(--ds-space-4);
  padding-inline: var(--ds-space-4);
  border-radius: var(--ds-radius-lg);
  background-color: var(--ds-color-surface-hud-translucent);
  color: var(--ds-color-text-primary);
  border: 2px solid var(--ds-color-provenance-fictional-border);
  box-shadow: var(--ds-elevation-md);
}

.shell-first-visit[hidden] {
  display: none;
}

.shell-first-visit-title {
  margin-block-start: 0;
  margin-block-end: var(--ds-space-2);
  font-size: var(--ds-text-md-size);
  font-weight: 700;
  color: var(--ds-color-provenance-fictional-text);
}

.shell-first-visit-body,
.shell-first-visit-sub {
  margin-block-start: 0;
  margin-block-end: var(--ds-space-3);
  font-size: var(--ds-text-sm-size);
  color: var(--ds-color-text-secondary);
}

.shell-no-webgl-page {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--ds-space-6);
  padding-inline: var(--ds-space-4);
}

.shell-no-webgl-card {
  max-inline-size: 560px;
  padding-block: var(--ds-space-6);
  padding-inline: var(--ds-space-6);
  border-radius: var(--ds-radius-lg);
  background-color: var(--ds-color-surface-card);
  border: 1px solid var(--ds-color-border-strong);
  box-shadow: var(--ds-elevation-md);
}

.shell-no-webgl-title {
  margin-block-start: 0;
  margin-block-end: var(--ds-space-3);
  font-size: var(--ds-text-xl-size);
}

.shell-no-webgl-body,
.shell-no-webgl-level {
  margin-block-start: 0;
  margin-block-end: var(--ds-space-3);
  color: var(--ds-color-text-secondary);
}

.shell-attribution {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-3);
  padding-block: var(--ds-space-2);
  padding-inline: var(--ds-space-4);
  background-color: var(--ds-color-surface-elevated);
  border-block-start: 1px solid var(--ds-color-border-subtle);
  font-size: var(--ds-text-xs-size);
  color: var(--ds-color-text-secondary);
}

.shell-attribution-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-4);
  list-style: none;
  margin-block: 0;
  margin-inline: 0;
  padding-block: 0;
  padding-inline: 0;
}

.shell-provenance-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-2);
}

.shell-prov-chip {
  display: inline-flex;
  align-items: center;
  padding-block: 2px;
  padding-inline: var(--ds-space-2);
  border-radius: var(--ds-radius-pill);
  font-weight: 600;
}

.shell-prov-verified {
  background-color: var(--ds-color-provenance-verified-bg);
  color: var(--ds-color-provenance-verified-text);
  border: 1px solid var(--ds-color-provenance-verified-border);
}

.shell-prov-estimated {
  background-color: var(--ds-color-provenance-estimated-bg);
  color: var(--ds-color-provenance-estimated-text);
  border: 1px solid var(--ds-color-provenance-estimated-border);
}

.shell-prov-fictional {
  background-color: var(--ds-color-provenance-fictional-bg);
  color: var(--ds-color-provenance-fictional-text);
  border: 1px solid var(--ds-color-provenance-fictional-border);
}