/* ============================================================
   GKA Game UI — game.css  v3
   Game overlays: header bar, HUD, canvas screens.
   Uses tokens from style.css. NO inline styles.
   ============================================================ */

html, body { overflow: hidden; }

/* ================================================================
   GAME HEADER — fixed top bar (Back · Title · Sound · Pause)
   ================================================================ */
.gka-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-md);
  background: rgba(11, 14, 31, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
}

.gka-header-back,
.gka-header-pause,
.gka-header-sound,
.gka-header-debug {
  width: 38px; height: 38px;
  border-radius: var(--r-full);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--t-fast), transform var(--t-fast);
  flex-shrink: 0;
}
.gka-header-back:hover,
.gka-header-pause:hover,
.gka-header-sound:hover,
.gka-header-debug:hover {
  background: var(--c-surface-3);
  transform: scale(1.1);
}
.gka-header-back:active,
.gka-header-pause:active,
.gka-header-sound:active,
.gka-header-debug:active { transform: scale(0.9); }
.gka-header-debug.active {
  background: #f59e0b;
  color: #000;
  border-color: #f59e0b;
}

/* Right-side button group (sound + pause) */
.gka-header-actions {
  display: flex;
  gap: var(--sp-sm);
  align-items: center;
}

.gka-header-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 3vw, 1.25rem);
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  flex: 1;
  padding: 0 var(--sp-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ================================================================
   HUD — fixed bar below header
   ================================================================ */
.gka-hud {
  position: fixed;
  top: 52px; left: 0; right: 0;
  z-index: 190;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 0 var(--sp-lg);
  background: rgba(11, 14, 31, 0.88);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  transition: opacity var(--t-normal);
}
.gka-hud.hidden { opacity: 0; pointer-events: none; }

.gka-score-block { text-align: center; }

.gka-score-label {
  font-size: 0.6rem; font-weight: 800;
  color: var(--c-text-muted);
  letter-spacing: 0.12em; text-transform: uppercase;
}

.gka-score-value {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  transition: transform var(--t-fast);
}
.gka-score-value.bump { transform: scale(1.4); }

.gka-lives-block { display: flex; gap: var(--sp-xs); font-size: 1.1rem; }


/* ================================================================
   GAME WRAPPER — fills space below fixed bars
   ================================================================ */
.gka-wrapper {
  position: fixed;
  top: 0; left: 0; right: 0;
  bottom: 50px; /* reserve for ad */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--c-bg);
  overflow: hidden;
  padding-top: 100px;  /* header 52px + hud 48px */
  padding-bottom: 8px;
}

/* ================================================================
   AD SLOT (fixed at bottom)
   ================================================================ */
.gka-ad-slot {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  width: 100%; height: 50px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-surface-2);
  border-top: 1px solid var(--c-border);
  color: var(--c-text-dim);
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  z-index: 250;
}
.gka-ad-slot::before {
  content: 'Advertisement';
  font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--c-text-dim);
  margin-right: var(--sp-sm);
}

/* ================================================================
   CANVAS AREA
   ================================================================ */
.gka-canvas-area { position: relative; container-type: size; }

#gka-canvas {
  border-radius: var(--r-md);
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--c-border);
  display: block;
}

/* === UI LAYER (overlaid on canvas) === */
.gka-ui-layer {
  position: absolute; inset: 0;
  pointer-events: none;
  border-radius: var(--r-md);
  overflow: hidden;
}
.gka-ui-layer > * { pointer-events: auto; }

/* ================================================================
   SHARED SCREEN BASE (start / gameover / pause)
   ================================================================ */
.gka-screen {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: var(--sp-xl);
  padding: var(--sp-lg) var(--sp-md);
  overflow-y: auto;
  scrollbar-width: none;
  background: rgba(11, 14, 31, 0.94);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: var(--r-md);
  animation: screen-enter var(--t-slow) cubic-bezier(0.2, 0, 0, 1) both;
}
.gka-screen::-webkit-scrollbar { display: none; }

@keyframes screen-enter {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1)    translateY(0); }
}

.gka-screen.hidden {
  display: none;
}

/* ================================================================
   START SCREEN
   ================================================================ */
.gka-game-icon {
  font-size: 15cqw;
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.6));
}

.gka-game-start-title {
  font-family: var(--font-display);
  font-size: 9cqw;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  text-align: center;
  padding: 0 var(--sp-lg);
  margin-bottom: calc(-1 * var(--sp-md)); /* tighten gap with desc */
}

/* Game description / how-to-play shown on start screen */
.gka-start-desc {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text-muted);
  text-align: center;
  max-width: 280px;
  line-height: 1.55;
  padding: 0 var(--sp-lg);
  margin-bottom: calc(-1 * var(--sp-sm));
}

.gka-start-btn {
  background: var(--grad-hero);
  color: white;
  border-radius: var(--r-full);
  font-family: var(--font-display);
  font-size: 6cqw;
  padding: var(--sp-md) var(--sp-3xl);
  box-shadow: var(--shadow-glow-pink);
  animation: pulse-glow 2s ease-in-out infinite;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  border: none;
}
.gka-start-btn:hover  { transform: scale(1.08) translateY(-2px); box-shadow: 0 0 48px rgba(255, 107, 154, 0.5); }
.gka-start-btn:active { transform: scale(0.92); }

/* Emoji-only variant */
.gka-btn-emoji { font-size: 2.5rem; padding: var(--sp-sm) var(--sp-2xl); }

.gka-start-hint {
  font-size: 0.78rem; font-weight: 700;
  color: var(--c-text-dim);
  letter-spacing: 0.06em;
  text-align: center;
}

#gka-screen-start {
  justify-content: flex-start;
  gap: var(--sp-md);
  padding-top: var(--sp-xl);
}

.gka-guide-card {
  width: min(100%, 520px);
  margin: var(--sp-sm) auto 0;
  padding: var(--sp-lg);
  background: rgba(19, 22, 41, 0.9);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  text-align: left;
}

.gka-guide-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--sp-xs);
  color: var(--c-text);
}

.gka-guide-breadcrumb {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--c-text-dim);
  margin-bottom: var(--sp-sm);
}

.gka-guide-meta {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-text-dim);
  margin-bottom: var(--sp-md);
}

.gka-guide-card h3 {
  margin-top: var(--sp-md);
  margin-bottom: var(--sp-xs);
  font-size: 0.95rem;
  color: var(--c-text);
}

.gka-guide-card p,
.gka-guide-card li {
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--c-text-muted);
  font-weight: 700;
}

.gka-guide-card ul {
  margin: 0 0 var(--sp-sm);
  padding-left: var(--sp-lg);
}

.gka-guide-card li {
  margin-bottom: 4px;
}

.gka-guide-card a {
  color: var(--c-blue);
  text-decoration: underline;
}

.gka-guide-verification li strong {
  color: var(--c-text);
}

/* ================================================================
   GAME OVER SCREEN
   ================================================================ */
.gka-gameover-title {
  font-family: var(--font-display);
  font-size: 9cqw;
  color: var(--c-pink);
  text-shadow: 0 0 24px rgba(247, 37, 133, 0.55);
}

.gka-result-card {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg) var(--sp-2xl);
  text-align: center;
  min-width: 200px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.gka-final-score-label {
  font-size: 0.75rem; font-weight: 800;
  color: var(--c-text-muted);
  letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: var(--sp-xs);
}

.gka-final-score-value {
  font-family: var(--font-display);
  font-size: 11cqw;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  line-height: 1;
  animation: score-pop 0.4s var(--t-fast) both;
}

@keyframes score-pop {
  0%   { transform: scale(0.5); opacity: 0; }
  70%  { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

.gka-best-row {
  margin-top: var(--sp-sm);
  font-size: 0.82rem; font-weight: 700;
  color: var(--c-yellow);
}

/* Share row inside gameover screen */
.gka-share-row {
  display: flex;
  gap: var(--sp-sm);
  align-items: center;
  justify-content: center;
}

.gka-share-btn {
  width: 42px; height: 42px;
  border-radius: var(--r-full);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  transition: transform var(--t-fast), filter var(--t-fast), box-shadow var(--t-fast);
  cursor: pointer;
  border: none;
  background: var(--c-surface-3);
  color: var(--c-text);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  text-decoration: none;
}
.gka-share-btn-tw     { background: #000; color: #fff; }
.gka-share-btn-line   { background: #06C755; color: #fff; }
.gka-share-btn-reddit { background: #FF4500; color: #fff; }

.gka-share-btn:hover {
  transform: scale(1.15) translateY(-3px);
  filter: brightness(1.2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}
.gka-share-btn:active { transform: scale(0.95); }

.gka-retry-btn {
  background: var(--grad-hero);
  color: white;
  border-radius: var(--r-full);
  font-family: var(--font-display);
  font-size: 6cqw;
  padding: var(--sp-md) var(--sp-3xl);
  box-shadow: var(--shadow-glow-pink);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  cursor: pointer; border: none;
}
.gka-retry-btn:hover  { transform: scale(1.08) translateY(-2px); box-shadow: 0 0 48px rgba(255, 107, 154, 0.5); }
.gka-retry-btn:active { transform: scale(0.92); }

.gka-home-btn {
  background: transparent;
  color: var(--c-text-muted);
  border: 2px solid var(--c-border);
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-weight: 800; font-size: 0.9rem;
  padding: var(--sp-sm) var(--sp-xl);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
}
.gka-home-btn:hover {
  border-color: var(--c-yellow); color: var(--c-yellow);
  transform: translateY(-2px) scale(1.05);
}

/* Borderless emoji home button */
.gka-home-btn.gka-btn-emoji { font-size: 1.5rem; border: none; }

/* ================================================================
   PAUSE SCREEN
   ================================================================ */
.gka-pause-title {
  font-family: var(--font-display);
  font-size: 9cqw;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* ================================================================
   FEEDBACK POPUP
   ================================================================ */
.gka-feedback-popup {
  position: absolute;
  top: 38%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: 9cqw;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  pointer-events: none;
  opacity: 0;
  white-space: nowrap;
  z-index: 20;
}

@keyframes feedback-pop {
  0%   { opacity: 0; transform: translate(-50%, -20%) scale(0.5); }
  30%  { opacity: 1; transform: translate(-50%, -50%) scale(1.25); }
  70%  { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -80%) scale(0.85); }
}
.gka-feedback-popup.show { animation: feedback-pop 1.1s ease forwards; }

/* ================================================================
   PROGRESS BAR
   ================================================================ */
.gka-progress-bar-wrap {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 4px;
  background: rgba(0, 0, 0, 0.15);
}
.gka-progress-bar {
  height: 100%;
  background: var(--grad-hero);
  transition: width 0.25s linear;
  border-radius: 0 2px 2px 0;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 480px) {
  .gka-header { padding: 0 var(--sp-sm); }
  .gka-hud    { padding: 0 var(--sp-md); }
  .gka-start-btn,
  .gka-retry-btn { padding: var(--sp-md) var(--sp-2xl); }
  .gka-start-desc { font-size: 0.82rem; }
}

/* ================================================================
   DEBUG PANEL
   ================================================================ */
.gka-debug-panel {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(7, 11, 24, 0.96);
  border: 1.5px solid #4CC9F0;
  border-radius: 12px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 9999;
  min-width: 260px;
  max-width: 90%;
}
.gka-debug-panel.hidden { display: none; }
.gka-dbg-row {
  display: flex;
  gap: 5px;
}
.gka-dbg-btn {
  flex: 1;
  padding: 9px 4px;
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(76,201,240,0.3);
  color: #e0eeff;
  font-size: 0.72rem;
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  cursor: pointer;
  transition: background 0.1s, transform 0.08s;
  white-space: nowrap;
}
.gka-dbg-btn:active { background: rgba(76,201,240,0.2); transform: scale(0.94); }
.gka-dbg-btn.active { background: #f59e0b; color: #000; border-color: #f59e0b; }