/* Rocket Parts: space theme, glass panels, right-to-left layout. */

:root {
  --bg-0: #0b1026;
  --bg-1: #05070f;
  --glass: rgba(14, 20, 40, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --hover: rgba(255, 255, 255, 0.07);
  --text: #e8ecf8;
  --text-soft: #c3cae0;
  --muted: #8a93b0;
  --accent: #7cc4ff;
  --school-teal: #1b595f;
  --school-teal-light: #2a8890;
  --radius: 16px;
  --radius-sm: 11px;
  --gutter: clamp(12px, 2vw, 28px);
  --logo-h: 88px;
  --bottom-h: 96px;
  --font-ar: 'IBM Plex Sans Arabic', 'Geeza Pro', 'Segoe UI', Tahoma, 'Noto Sans Arabic', system-ui, sans-serif;
  --font-en: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  color-scheme: dark;
}

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

html {
  font-size: clamp(14px, 0.5vw + 9.5px, 19px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg-1);
}

body {
  background: radial-gradient(ellipse at 50% 45%, var(--bg-0), var(--bg-1) 75%) fixed;
  color: var(--text);
  font-family: var(--font-ar);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

:lang(en) {
  font-family: var(--font-en);
}

[hidden] {
  display: none !important;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ------------------------------------------------------------------ canvas */

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}

/* --------------------------------------------------------------- overlay */

.app {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

.glass,
.controls,
.panel,
.card,
.hint,
.legend-chip {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
}

/* ---------------------------------------------------------------- header */

.topbar {
  position: absolute;
  top: max(var(--gutter), env(safe-area-inset-top));
  right: max(var(--gutter), env(safe-area-inset-right));
  left: max(var(--gutter), env(safe-area-inset-left));
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  pointer-events: auto;
  min-width: 0;
}

.title {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}

.title-ar {
  font-size: clamp(1.6rem, 1.1rem + 1.4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0;
}

.title-en {
  margin-top: 4px;
  font-size: clamp(0.8rem, 0.7rem + 0.3vw, 1.05rem);
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.logo {
  display: block;
  height: var(--logo-h);
  width: auto;
  flex: none;
  opacity: 0.9;
  user-select: none;
  -webkit-user-drag: none;
}

/* ---------------------------------------------------------------- buttons */

.pill,
.segmented [role='radio'],
.parts-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.2;
  cursor: pointer;
  pointer-events: auto;
  white-space: nowrap;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.pill:hover,
.segmented [role='radio']:hover {
  background: var(--hover);
  color: var(--text);
}

.pill[aria-pressed='true'] {
  color: var(--text);
  border-color: rgba(124, 196, 255, 0.35);
  background: rgba(124, 196, 255, 0.1);
}

.parts-button {
  background: var(--glass);
  border-color: var(--glass-border);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  min-height: 36px;
  padding: 6px 12px;
  font-size: 0.86rem;
}

.parts-button[aria-expanded='true'] {
  border-color: rgba(124, 196, 255, 0.45);
  color: var(--text);
}

.icon {
  width: 17px;
  height: 17px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.85;
}

.lbl .en {
  color: var(--muted);
  font-size: 0.92em;
}

.pill[aria-pressed='true'] .en,
.segmented [aria-checked='true'] .en {
  color: var(--text-soft);
}

/* ---------------------------------------------------------- bottom area */

.bottom {
  position: absolute;
  right: 0;
  left: 0;
  bottom: max(10px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 0 var(--gutter);
  pointer-events: none;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 5px;
  border-radius: var(--radius);
  max-width: 100%;
  pointer-events: auto;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
}

.segmented [role='radio'] {
  min-height: 34px;
  padding: 5px 13px;
  border-radius: 10px;
}

.segmented [aria-checked='true'] {
  background: rgba(124, 196, 255, 0.16);
  color: var(--text);
  border-color: rgba(124, 196, 255, 0.3);
}

.hint {
  margin: 0;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-soft);
  pointer-events: none;
  text-align: center;
  transition: opacity 700ms ease, transform 700ms ease;
}

.hint .hint-en {
  color: var(--muted);
}

.hint.is-gone {
  opacity: 0;
  transform: translateY(6px);
  visibility: hidden;
  transition: opacity 700ms ease, transform 700ms ease, visibility 0s linear 700ms;
}

.footer {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  pointer-events: auto;
  max-width: 100%;
}

.footer a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: rgba(138, 147, 176, 0.45);
  text-underline-offset: 2px;
}

.footer a:hover {
  color: var(--text-soft);
}

/* ------------------------------------------------------------ parts list */

.parts-panel {
  position: absolute;
  right: max(var(--gutter), env(safe-area-inset-right));
  width: min(320px, calc(100vw - 2 * var(--gutter)));
  padding: 6px 6px 10px;
  border-radius: var(--radius);
  overflow-y: auto;
  overscroll-behavior: contain;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 180ms ease, transform 180ms ease;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}

.parts-panel.is-open {
  opacity: 1;
  transform: none;
}

.group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 10px 4px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c);
}

.group-title .en {
  color: var(--muted);
  font-weight: 400;
}

.group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.part-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  padding: 6px 12px 6px 10px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  text-align: right;
  cursor: pointer;
  line-height: 1.3;
}

.part-item:hover,
.part-item:focus-visible {
  background: var(--hover);
}

.item-ar {
  font-size: 0.95rem;
  color: var(--text);
}

.item-en {
  font-size: 0.76rem;
  color: var(--muted);
}

.dot {
  width: 10px;
  height: 10px;
  flex: none;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 10px color-mix(in srgb, var(--c) 70%, transparent);
}

/* ---------------------------------------------------------------- legend */

.legend {
  position: absolute;
  left: max(var(--gutter), env(safe-area-inset-left));
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: auto;
}

.legend-chip {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 12px 6px 10px;
  border-radius: 12px;
  cursor: pointer;
  text-align: right;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.legend-chip:hover,
.legend-chip:focus-visible {
  border-color: color-mix(in srgb, var(--c) 55%, transparent);
}

.legend-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.25;
}

.legend-text .ar {
  font-size: 0.8rem;
  color: var(--text);
}

.legend-text .en {
  font-size: 0.68rem;
  color: var(--muted);
}

/* ------------------------------------------------------------- info card */

.card {
  position: absolute;
  top: 0;
  left: 0;
  width: max-content;
  max-width: min(340px, calc(100vw - 24px));
  padding: 14px 18px 14px;
  border-radius: var(--radius);
  pointer-events: none;
  z-index: 20;
  opacity: 0;
  transition: opacity 160ms ease;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.card.is-visible {
  opacity: 1;
}

.card.is-pinned {
  pointer-events: auto;
  border-color: color-mix(in srgb, var(--c) 40%, transparent);
}

.card .chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  padding: 3px 11px 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 32%, transparent);
}

.card .chip .dot {
  width: 8px;
  height: 8px;
}

.card .chip-en {
  font-weight: 400;
}

.card-ar {
  margin: 10px 0 0;
  font-size: clamp(1.45rem, 1.2rem + 0.6vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
}

.card-en {
  margin: 2px 0 0;
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-soft);
  text-align: right;
}

.divider {
  height: 1px;
  margin: 12px 0;
  border: 0;
  background: rgba(255, 255, 255, 0.1);
}

.card-role {
  margin: 0;
  font-size: max(18px, 1.12rem);
  line-height: 1.75;
  color: var(--text);
}

.card-tag {
  margin: 10px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.card-close {
  position: absolute;
  top: 8px;
  left: 8px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.card-close:hover {
  background: var(--hover);
  color: var(--text);
}

.card-close svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.card.is-sheet {
  left: 12px !important;
  right: 12px;
  width: auto;
  max-width: none;
  max-height: 46vh;
  overflow-y: auto;
  padding: 12px 16px;
}

.card.is-sheet .card-ar {
  margin-top: 8px;
  font-size: 1.35rem;
}

.card.is-sheet .divider {
  margin: 9px 0;
}

.card.is-sheet .card-role {
  line-height: 1.65;
}

.card.is-sheet .card-tag {
  margin-top: 6px;
}

/* ---------------------------------------------------------------- loader */

.loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(ellipse at 50% 45%, var(--bg-0), var(--bg-1) 75%);
  transition: opacity 600ms ease;
}

.loader.is-done {
  opacity: 0;
  pointer-events: none;
}

.loader-logo {
  display: block;
  height: 240px;
  width: auto;
  max-width: 80vw;
  object-fit: contain;
  opacity: 0.95;
}

.progress {
  width: min(240px, 60vw);
  height: 2px;
  margin-top: 30px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.progress-bar {
  display: block;
  height: 100%;
  background: linear-gradient(to left, var(--school-teal), var(--school-teal-light));
  transform: scaleX(0.08);
  transform-origin: right center;
  transition: transform 450ms ease;
}

.loader-text {
  margin: 14px 0 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.loader-error {
  max-width: 34ch;
  margin: 14px 0 0;
  text-align: center;
  color: #ffc2b8;
}

.loader.has-error .progress,
.loader.has-error .loader-text {
  display: none;
}

/* ------------------------------------------------------------ responsive */

@media (max-width: 640px), (max-height: 500px) {
  :root {
    --logo-h: 56px;
  }

  .loader-logo {
    height: 160px;
  }
}

/* Tablets and phones: labels stack (Arabic above English) so the controls
   fit on fewer rows and give larger touch targets. */
@media (max-width: 900px) {
  .controls .lbl,
  .parts-button .lbl {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.15;
  }

  .controls .lbl .sep,
  .parts-button .lbl .sep {
    display: none;
  }

  .controls .lbl .en,
  .parts-button .lbl .en {
    font-size: 0.8em;
  }

  .pill,
  .segmented [role='radio'] {
    min-height: 46px;
    padding: 5px 14px;
    font-size: 0.95rem;
  }
}

@media (max-width: 640px) {
  .title-ar {
    font-size: 1.45rem;
  }

  .controls {
    gap: 4px;
    padding: 4px;
  }

  .controls .icon {
    display: none;
  }

  .pill,
  .segmented [role='radio'] {
    padding: 5px 10px;
    min-height: 44px;
    font-size: 0.86rem;
  }

  .segmented {
    flex-basis: 100%;
    justify-content: center;
    background: transparent;
    border: 0;
    padding: 0;
  }

  .segmented [role='radio'] {
    flex: 1 1 0;
    max-width: 160px;
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--glass-border);
  }

  .hint {
    font-size: 0.82rem;
  }

  .footer {
    font-size: 0.66rem;
  }

  .legend-chip {
    padding: 5px 9px 5px 8px;
  }
}

@media (max-height: 520px) {
  .legend-text .en {
    display: none;
  }

  .legend-chip {
    padding: 4px 9px 4px 8px;
  }
}

/* Landscape phones: everything on one line so the rocket keeps its space. */
@media (max-height: 500px) and (min-width: 560px) {
  .brand {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .title-ar {
    font-size: 1.3rem;
  }

  .title-en {
    font-size: 0.72rem;
  }

  .controls .lbl,
  .parts-button .lbl {
    display: inline;
  }

  .controls .lbl .sep,
  .parts-button .lbl .sep {
    display: inline;
  }

  .controls .icon {
    display: none;
  }

  .pill,
  .segmented [role='radio'],
  .parts-button {
    min-height: 34px;
    padding: 4px 10px;
    font-size: 0.8rem;
  }

  .segmented {
    flex-basis: auto;
  }

  .segmented [role='radio'] {
    min-height: 30px;
  }

  .bottom {
    gap: 4px;
  }

  .hint {
    padding: 4px 12px;
    font-size: 0.74rem;
  }

  .footer {
    font-size: 0.62rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}