/* =============================================================================
   game-shell.css
   Unifying chrome for all exercise pages: header, layout grid, settings panel,
   metric cards, HUD bar, and shared button polish. Distilled from the canonical
   pages (bubble / comet / precision-drop) so every game looks like the same
   product.

   Loaded AFTER tokens.css, base.css, components.css so it provides authoritative
   structural rules. Page-specific inline <style> blocks may still override
   details where intentional (per-game palettes, custom HUD slots, etc.).

   Promote-to-live: when these test-redesign pages are copied over the live
   /exercises/ files, this CSS file moves with them — no other changes needed.
   ============================================================================= */

/* ---- Shared theme (extracted from canonical exercise pages) ---------------- */
:root {
  --game-bg-1: #070b16;
  --game-bg-2: #0f1630;
  --game-bg-3: #0b1024;
  --game-text: #eaf6ff;
  --game-text-secondary: #b8c5d1;
  --game-text-muted: #8a96a3;
  --game-accent: #6fd3f5;
  --game-accent-soft: rgba(111, 211, 245, 0.12);
  --game-accent-strong: rgba(111, 211, 245, 0.95);
  --game-good: #8ff5b2;
  --game-gold: #ffd700;
  --game-panel-bg: rgba(10, 16, 36, 0.9);
  --game-panel-border: rgba(255, 255, 255, 0.08);
  --game-hud-bg: rgba(15, 22, 41, 0.85);
  --game-radius: 14px;
  --game-radius-sm: 10px;
}

/* ---- Body background (shared deep-space gradient) ------------------------- */
body.game-page {
  margin: 0;
  color: var(--game-text);
  background:
    radial-gradient(1200px 800px at 20% 25%, rgba(70, 30, 120, 0.35), transparent 60%),
    radial-gradient(900px 700px at 75% 65%, rgba(20, 120, 160, 0.28), transparent 55%),
    linear-gradient(180deg, var(--game-bg-1) 0%, var(--game-bg-2) 50%, var(--game-bg-3) 100%);
  min-height: 100vh;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow-x: hidden;
}
body.game-page.playing { overflow: hidden; }
body.game-page.playing .app { display: none; }

/* ---- Header (unified across all games) ------------------------------------ */
.app {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 12px 16px;
  display: flex;
  gap: 12px;
  align-items: center;
  background: linear-gradient(180deg, rgba(8, 12, 26, 0.9), rgba(8, 12, 26, 0.55));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}
.app h1 {
  margin: 0;
  font-size: clamp(18px, 3vw, 24px);
  color: var(--game-text);
  font-weight: 700;
}
.app .home {
  text-decoration: none;
  color: var(--game-text);
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 8px 12px;
  transition: all 0.2s;
  font-size: 14px;
}
.app .home:hover {
  background: var(--game-accent-soft);
  border-color: var(--game-accent);
}
.app .home:focus-visible {
  outline: 2px solid var(--game-accent);
  outline-offset: 2px;
}

/* ---- Layout grid ----------------------------------------------------------
   NOTE: We intentionally do NOT define `.layout` or `main.page` grid rules
   here. Each game has its own correct layout (some are 2-column with a
   game preview on the right; others are single-column centered settings).
   Forcing a 2-column grid universally squishes the settings panel on games
   whose right column is hidden until play starts. Let each page own this.
   ------------------------------------------------------------------------- */

/* ---- Settings panel ------------------------------------------------------- */
.panel {
  background: var(--game-panel-bg);
  border: 1px solid var(--game-panel-border);
  border-radius: var(--game-radius);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  padding: 20px;
  color: var(--game-text);
}
.panel h2 {
  margin: 0 0 16px;
  font-size: 20px;
  text-align: center;
  color: var(--game-text);
}

/* Metric cards (used in settings stats and end-of-session results) */
.stats-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.metric {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: var(--game-accent-soft);
  min-width: 110px;
}
.metric .v {
  font-weight: 900;
  font-size: 24px;
  color: #bfe6ff;
  text-shadow: 0 0 6px rgba(150, 220, 255, 0.5);
  line-height: 1.1;
}
.metric .t {
  font-size: 12px;
  opacity: 0.9;
  margin-top: 4px;
  color: var(--game-text-secondary);
}

/* ---- In-game HUD ---------------------------------------------------------- */
.hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 12px;
  align-items: center;
  position: relative;
  padding: 16px;
  padding-top: 24px;
  background: var(--game-hud-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--game-panel-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  flex-shrink: 0;
}
.hud-group {
  display: grid;
  gap: 4px;
  text-align: center;
}
.hud-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--game-accent);
  text-shadow: 0 0 8px rgba(111, 211, 245, 0.7);
  line-height: 1.1;
}
.hud-label {
  font-size: 13px;
  color: var(--game-text-secondary);
  opacity: 0.9;
}
.hud-value.level {
  color: var(--game-good);
  text-shadow: 0 0 8px rgba(143, 245, 178, 0.7);
}
.hud-value.combo {
  color: var(--game-gold);
  text-shadow: 0 0 12px rgba(255, 215, 0, 0.8);
}

/* HUD timer-bar overlay (used by bubble; harmless on others) */
.timer-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 8px;
  width: 100%;
  background: linear-gradient(90deg, var(--game-accent), rgba(111, 211, 245, 0.35));
  transform-origin: left center;
  transition: width 0.1s linear;
}

/* HUD controls row */
.hud .controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  grid-column: 1 / -1;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .hud {
    grid-template-columns: repeat(3, 1fr);
    padding: 12px;
  }
  .hud-value { font-size: 22px; }
  .hud-label { font-size: 11px; }
}

/* ---- Buttons (game-tuned, complement components.css .btn) ---------------- */
.app .home,
.btn.btn-game,
.panel .btn {
  font-family: inherit;
}
.panel .btn {
  width: 100%;
  min-height: 50px;
  border: 1px solid rgba(111, 211, 245, 0.35);
  background: var(--game-accent-soft);
  color: var(--game-text);
  border-radius: var(--game-radius-sm);
  font-weight: 800;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: 0.2s;
  font-size: 16px;
}
.panel .btn:hover:not(:disabled) {
  background: rgba(111, 211, 245, 0.22);
  transform: translateY(-1px);
}
.panel .btn:disabled { opacity: 0.55; cursor: not-allowed; }
.panel .btn-primary {
  background: var(--game-accent-strong);
  color: #07101e;
  border-color: rgba(111, 211, 245, 1);
}
.panel .btn-primary:hover:not(:disabled) {
  background: rgba(111, 211, 245, 1);
  box-shadow: 0 6px 18px rgba(111, 211, 245, 0.45);
}
.panel .btn-secondary {
  background: rgba(143, 245, 178, 0.15);
  border-color: rgba(143, 245, 178, 0.4);
  color: var(--game-good);
}
.panel .btn-secondary:hover:not(:disabled) {
  background: rgba(143, 245, 178, 0.25);
}
.panel .btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  min-height: 44px;
  width: auto;
}

.panel .btn-row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}
.panel .btn-row .btn { flex: 1; }

/* ---- Form controls in settings panel -------------------------------------- */
.panel select,
.panel input[type="number"],
.panel input[type="text"] {
  width: 100%;
  padding: 12px;
  border-radius: var(--game-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(5, 10, 26, 0.8);
  color: var(--game-text);
  font-size: 16px;
}
.panel select:focus,
.panel input[type="number"]:focus,
.panel input[type="text"]:focus {
  outline: none;
  border-color: rgba(111, 211, 245, 0.9);
  box-shadow: 0 0 0 2px rgba(111, 211, 245, 0.25);
}
.panel .group { margin-bottom: 16px; }
.panel .label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--game-text);
}
.panel .setting-help,
.panel small {
  color: var(--game-text-muted);
  font-size: 12px;
}

/* Description / how-to-play callout */
.panel .desc {
  margin-bottom: 16px;
  background: rgba(111, 211, 245, 0.08);
  border-left: 4px solid rgba(111, 211, 245, 0.7);
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--game-text);
}

/* ---- Pattern-B legacy aliases --------------------------------------------
   Pages that still ship `.site-header`, `.page`, or `.metric-settings`
   markup get the canonical chrome without an HTML rewrite. We touch only
   the outer container and the home button, leaving each page's own .inner
   wrapper (which sets max-width / padding / flex layout) to do its job.
   ------------------------------------------------------------------------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, rgba(8, 12, 26, 0.9), rgba(8, 12, 26, 0.55));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}
header.site-header h1 {
  margin: 0;
  font-size: clamp(18px, 3vw, 24px);
  color: var(--game-text);
  font-weight: 700;
}

/* Pattern-B layout container — intentionally not overridden here (see note
   above on .layout). Each Pattern B page keeps its own .page grid. */

/* Pattern-B metric card alias */
.metric-settings {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: var(--game-accent-soft);
  min-width: 110px;
  color: var(--game-text);
}

/* Pattern-B home button (was rendered as a generic .btn) — give it the
   canonical pill look when it lives inside the site-header. */
header.site-header a.btn,
header.site-header .home {
  text-decoration: none;
  color: var(--game-text);
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 8px 12px;
  background: transparent;
  min-height: 0;
  width: auto;
  font-size: 14px;
  transition: all 0.2s;
}
header.site-header a.btn:hover,
header.site-header .home:hover {
  background: var(--game-accent-soft);
  border-color: var(--game-accent);
}

/* =============================================================================
   Responsive tier system — tuned for phones, tablets, and the Capacitor
   Android shell. The mobile-first base styles above target ~360-640px; the
   tiers below progressively enhance for larger phones, tablets, and landscape
   orientation. We intentionally tune ONLY the shared chrome (header, HUD,
   panel typography, metric cards, buttons) — each game's own canvas / play
   area / grid keeps its per-game @media rules so we don't risk regressions.

   Tiers chosen to align with real device widths:
     ≤480px     small phones (iPhone SE, older Androids)
     481-640    modern phones portrait
     641-900    large phones landscape, 7" tablets portrait
     901-1200   8-10" tablets portrait, smaller tablets landscape
     ≥1201     10"+ tablets landscape, desktops
   ============================================================================= */

/* ---- Safe-area insets for notched phones and Android nav gestures --------
   env(safe-area-inset-*) returns non-zero only when viewport-fit=cover is set
   on the page's meta viewport (already true on every exercise page). max()
   keeps the existing minimum padding when there's no inset to respect. */
.app,
header.site-header {
  padding-left: max(16px, env(safe-area-inset-left, 16px));
  padding-right: max(16px, env(safe-area-inset-right, 16px));
  padding-top: max(12px, env(safe-area-inset-top, 12px));
}

/* ---- Small phones (≤480) — tighten everything ---------------------------- */
@media (max-width: 480px) {
  .app,
  header.site-header {
    padding-top: max(8px, env(safe-area-inset-top, 8px));
    padding-bottom: 8px;
  }
  .app h1,
  header.site-header h1 {
    font-size: 17px;
  }
  .panel {
    padding: 14px;
    border-radius: 12px;
  }
  .panel h2 {
    font-size: 18px;
    margin-bottom: 12px;
  }
  .stats-row {
    gap: 6px;
    margin-bottom: 12px;
  }
  .metric,
  .metric-settings {
    min-width: 90px;
    padding: 10px 8px;
  }
  .metric .v {
    font-size: 20px;
  }
  .metric .t {
    font-size: 11px;
  }
  .hud {
    padding: 10px;
    gap: 8px;
    padding-top: 18px;
  }
  .hud-value {
    font-size: 18px;
  }
  .hud-label {
    font-size: 10px;
  }
  .panel .btn {
    min-height: 48px;
    font-size: 15px;
    padding: 0 14px;
  }
  .panel .btn-row {
    gap: 8px;
  }
}

/* ---- Tablets portrait (641-900) — wider settings, bigger HUD ------------- */
@media (min-width: 641px) and (max-width: 900px) {
  .panel h2 {
    font-size: 22px;
    margin-bottom: 18px;
  }
  .stats-row {
    gap: 14px;
  }
  .metric,
  .metric-settings {
    min-width: 130px;
    padding: 16px;
  }
  .metric .v {
    font-size: 28px;
  }
  .metric .t {
    font-size: 13px;
  }
  /* Override the legacy `@media (max-width: 900px)` HUD compression for this
     larger tier — tablets have room to breathe. */
  .hud {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    padding: 18px;
    gap: 14px;
    padding-top: 24px;
  }
  .hud-value {
    font-size: 26px;
  }
  .hud-label {
    font-size: 13px;
  }
}

/* ---- Settings panel widen on tablets+ ------------------------------------
   Several games hard-code `.settings-panel { max-width: 480px }` in their
   inline styles — too narrow for 7"+ tablets. Game-shell loads after the
   inline <style> block, so this rule wins at equal specificity. */
@media (min-width: 641px) {
  .settings-panel {
    max-width: 640px;
  }
  .summary-panel {
    max-width: 640px;
  }
}
@media (min-width: 1025px) {
  .settings-panel {
    max-width: 720px;
  }
  .summary-panel {
    max-width: 720px;
  }
}

/* ---- Large tablets portrait & smaller landscape (901-1200) --------------- */
@media (min-width: 901px) and (max-width: 1200px) {
  .panel h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  .metric,
  .metric-settings {
    min-width: 150px;
    padding: 18px;
  }
  .metric .v {
    font-size: 32px;
  }
  .metric .t {
    font-size: 14px;
  }
  .hud {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    padding: 20px;
    gap: 16px;
  }
  .hud-value {
    font-size: 30px;
  }
  .hud-label {
    font-size: 14px;
  }
  .panel .btn {
    font-size: 17px;
    min-height: 54px;
  }
}

/* ---- 10"+ tablets landscape & desktops (≥1201) --------------------------- */
@media (min-width: 1201px) {
  .panel h2 {
    font-size: 26px;
  }
  .metric,
  .metric-settings {
    min-width: 160px;
    padding: 20px;
  }
  .metric .v {
    font-size: 34px;
  }
  .hud {
    padding: 22px;
    gap: 20px;
  }
  .hud-value {
    font-size: 32px;
  }
  .hud-label {
    font-size: 15px;
  }
}

/* ---- Phone landscape — compact header & HUD so play area dominates ------ */
@media (max-height: 500px) and (orientation: landscape) {
  .app,
  header.site-header {
    padding-top: max(4px, env(safe-area-inset-top, 4px));
    padding-bottom: 4px;
  }
  .app h1,
  header.site-header h1 {
    font-size: 16px;
  }
  .hud {
    padding: 8px 12px;
    padding-top: 14px;
    gap: 8px;
  }
  .hud-value {
    font-size: 18px;
  }
  .hud-label {
    font-size: 10px;
  }
}

/* ---- Touch target compliance (Android Material 48×48, WCAG 2.5.5) ------- */
@media (pointer: coarse) {
  .panel .btn,
  .app .home,
  header.site-header a.btn,
  header.site-header .home {
    min-height: 48px;
  }
  .panel .btn-ghost {
    min-height: 48px;
    min-width: 48px;
  }
}

/* ---- Reduced-motion accessibility (relevant for vestibular sensitivity,
   common after stroke / brain injury) -------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .panel .btn:hover:not(:disabled) {
    transform: none;
  }
  .app .home,
  header.site-header a.btn,
  header.site-header .home {
    transition: none;
  }
}

/* ---- Forced colors / high contrast (Windows High Contrast, etc.) -------- */
@media (forced-colors: active) {
  .panel,
  header.site-header,
  .app {
    border: 1px solid CanvasText;
  }
  .panel .btn {
    border: 2px solid ButtonText;
  }
}