/* Coin Dash — style.css
   Design tokens + toàn bộ UI. Mọi class ở đây đều được markup hoặc ui.js sử dụng. */

/* ===== 1. Design tokens ===== */
:root {
  /* Color */
  --color-primary: #6C5CE7;
  --color-primary-dark: #5A4BD1;
  --color-secondary: #00B894;
  --color-secondary-dark: #009B7D;
  --color-danger: #E17055;
  --color-danger-dark: #C85A40;
  --color-coin: #FFC93C;
  --color-coin-dark: #B57E14;
  --color-text: #1F2937;
  --color-text-muted: #5B6473;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F2F5FA;
  --color-border: #D8DFE9;
  --color-outline: #27313F;
  --color-sky: #DFF4FF;

  /* Typography */
  --font-family: "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-size-sm: 0.85rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.7rem;
  --font-size-hero: 2.4rem;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 2px 6px rgba(31, 41, 55, 0.12);
  --shadow-md: 0 6px 18px rgba(31, 41, 55, 0.18);
  --shadow-lg: 0 14px 40px rgba(31, 41, 55, 0.26);

  /* Overlay */
  --overlay-screen: rgba(23, 30, 44, 0.55);
  --overlay-modal: rgba(23, 30, 44, 0.62);

  /* Focus ring */
  --focus-ring: 0 0 0 3px rgba(255, 255, 255, 0.9), 0 0 0 6px var(--color-primary);

  /* Z-index scale */
  --z-canvas: 0;
  --z-hud: 20;
  --z-toast: 30;
  --z-screen: 40;
  --z-modal: 50;
}

/* ===== 2. Shell & stage ===== */
body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: linear-gradient(180deg, #2B3550 0%, #3E4C74 100%);
  overflow-x: hidden;
}

.game-shell {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.game-stage {
  position: relative;
  width: min(100%, 1280px);
  aspect-ratio: 16 / 9;
  max-height: 82svh;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-sky);
}

#gameCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-canvas);
  touch-action: manipulation;
}

/* ===== 3. Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--font-size-md);
  line-height: 1.2;
  transition: transform 0.08s ease, box-shadow 0.08s ease, background-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:active {
  transform: translateY(2px) scale(0.98);
}
.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn-cta {
  min-height: 60px;
  width: 100%;
  font-size: var(--font-size-lg);
  letter-spacing: 0.02em;
  color: #FFFFFF;
  background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
  border-bottom: 4px solid #007D65;
  box-shadow: var(--shadow-md);
  text-transform: uppercase;
}
.btn-cta:hover { filter: brightness(1.06); }

.btn-primary {
  color: #FFFFFF;
  background: var(--color-primary);
  border-bottom: 3px solid var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { background: var(--color-surface-alt); }

.btn-ghost {
  color: var(--color-text-muted);
  background: transparent;
}
.btn-ghost:hover { color: var(--color-text); background: rgba(31, 41, 55, 0.06); }

.btn-danger {
  color: #FFFFFF;
  background: var(--color-danger);
  border-bottom: 3px solid var(--color-danger-dark);
}
.btn-danger:hover { background: var(--color-danger-dark); }

.btn-icon {
  min-width: 44px;
  min-height: 44px;
  padding: var(--space-2);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
}
.btn-icon .icon { width: 22px; height: 22px; }

.btn-small {
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.icon { width: 20px; height: 20px; flex: none; }

/* ===== 4. HUD (z 20, CSS pixel, không scale theo canvas) ===== */
.hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-hud);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: calc(var(--space-3) + env(safe-area-inset-top, 0px))
    calc(var(--space-3) + env(safe-area-inset-right, 0px))
    0
    calc(var(--space-3) + env(safe-area-inset-left, 0px));
  pointer-events: none;
}
.hud > * { pointer-events: auto; }
.hud[hidden] { display: none; }

/* Khi PAUSED: HUD hiển thị mờ dưới overlay, không nhận pointer event. */
.hud.hud-inert,
.hud.hud-inert > * { pointer-events: none; }

.hud-group { display: flex; gap: var(--space-2); align-items: center; }

.hud-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid rgba(31, 41, 55, 0.14);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.hud-value { min-width: 2ch; text-align: right; }
#hudHearts { gap: var(--space-1); }
#hudHearts .icon { width: 22px; height: 22px; }
button.hud-chip { cursor: pointer; }

/* ===== 5. Screens (z 40) ===== */
.screen {
  position: absolute;
  inset: 0;
  z-index: var(--z-screen);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.screen[hidden] { display: none; }

.screen-overlay { background: var(--overlay-screen); }

/* Panel dùng chung cho các overlay screen. */
.panel {
  width: min(100%, 560px);
  max-height: 100%;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.panel-wide { width: min(100%, 760px); }
.panel-narrow { width: min(100%, 400px); }

.panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.panel-header .panel-heading { flex: 1; }
.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.panel-heading { font-size: var(--font-size-xl); }
.panel-heading:focus-visible { outline: none; }
.panel-subtitle { color: var(--color-text-muted); }

.panel-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.howto-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: var(--color-text);
}
kbd {
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

/* ===== 6. Loading ===== */
.screen-loading {
  background: linear-gradient(180deg, #BDE3FF 0%, #DFF4FF 100%);
}
.loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  width: min(100%, 340px);
}
.loading-logo {
  font-size: var(--font-size-hero);
  font-weight: 900;
  color: var(--color-primary);
  text-shadow: 0 3px 0 rgba(255, 255, 255, 0.8);
}
.loading-bar {
  width: 100%;
  height: 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.8);
  border: 2px solid var(--color-border);
  overflow: hidden;
}
.loading-fill {
  height: 100%;
  width: 0%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-coin) 0%, var(--color-secondary) 100%);
  transition: width 0.2s ease;
}
.loading-text { color: var(--color-text-muted); font-weight: 600; }

/* ===== 7. Home (full-stage scene, không dùng white modal) ===== */
.screen-home {
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  background: transparent; /* canvas attract scene hiển thị phía sau */
  padding: var(--space-4) var(--space-5);
  pointer-events: none;
}
.screen-home > * { pointer-events: auto; }

.home-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.home-logo { display: flex; align-items: center; gap: var(--space-2); }
.home-logo-coin { width: 40px; height: 40px; }
.home-title {
  font-size: var(--font-size-hero);
  font-weight: 900;
  color: var(--color-primary);
  text-shadow: 0 3px 0 rgba(255, 255, 255, 0.85), 0 6px 14px rgba(31, 41, 55, 0.25);
}
.home-title:focus-visible { outline: none; }

.home-stats { display: flex; gap: var(--space-2); }
.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid rgba(31, 41, 55, 0.12);
  box-shadow: var(--shadow-sm);
  font-size: var(--font-size-sm);
}
.stat-label { color: var(--color-text-muted); font-weight: 600; }
.stat-value { font-weight: 800; font-variant-numeric: tabular-nums; }

.home-tagline {
  margin-top: var(--space-1);
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text);
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.7);
}

/* Hero mobile: desktop ẩn (nhân vật được vẽ bằng attract scene trên canvas). */
.home-hero {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  min-height: 0;
  justify-content: center;
}
#homeHeroCanvas { width: 190px; height: 190px; }
.home-character-name {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.85);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
}

.home-sheet {
  margin-top: auto;
  width: min(100%, 460px);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.home-secondary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}
.home-secondary .btn { padding-left: var(--space-2); padding-right: var(--space-2); }
.home-sheet .btn-ghost { align-self: flex-start; }

/* ===== 8. Mission cards ===== */
.mission-card {
  background: rgba(255, 255, 255, 0.94);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-sm);
}
.mission-card-featured { border-color: var(--color-coin); }
.mission-eyebrow {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-coin-dark);
}
.mission-title { font-size: var(--font-size-md); font-weight: 800; }
.mission-desc { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.mission-progress-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
}
.mission-values { font-weight: 800; font-variant-numeric: tabular-nums; }
.mission-reward { font-size: var(--font-size-sm); font-weight: 700; color: var(--color-coin-dark); }
.mission-done { color: var(--color-secondary-dark); font-weight: 800; }

.progress-bar {
  width: 100%;
  height: 12px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-coin) 0%, var(--color-secondary) 100%);
  transition: width 0.3s ease;
}

.mission-list { display: flex; flex-direction: column; gap: var(--space-3); }

/* ===== 9. Character select ===== */
.character-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
}
.char-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 3px solid var(--color-border);
  background: var(--color-surface-alt);
}
.char-card.char-selected {
  border-color: var(--color-secondary);
  background: #EAFBF6;
}
.char-badge {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-secondary);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 800;
}
.char-canvas { width: 96px; height: 110px; }
.char-card.char-locked .char-canvas { filter: grayscale(0.9) opacity(0.55); }
.char-name { font-weight: 800; }
.char-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 600;
}
.char-price {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 800;
  color: var(--color-coin-dark);
}
.char-card .btn { width: 100%; }
.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* ===== 10. Settings ===== */
.settings-group { display: flex; flex-direction: column; }
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}
.setting-row:last-child { border-bottom: none; }
.setting-label { font-weight: 700; display: flex; flex-direction: column; gap: 2px; }
.setting-hint { font-size: 0.75rem; font-weight: 500; color: var(--color-text-muted); }
.setting-row-danger .setting-label { color: var(--color-text-muted); font-weight: 600; }

.switch {
  position: relative;
  flex: none;
  width: 56px;
  height: 32px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  transition: background-color 0.15s ease;
}
.switch:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.switch[aria-checked="true"] { background: var(--color-secondary); }
.switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease;
}
.switch[aria-checked="true"] .switch-thumb { transform: translateX(24px); }

/* ===== 11. Game Over ===== */
.record-badge {
  align-self: flex-start;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-coin);
  border: 2px solid var(--color-coin-dark);
  font-weight: 900;
  animation: recordPop 0.4s ease;
}
@keyframes recordPop {
  0% { transform: scale(0.6); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: var(--space-2);
}
.result-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}
.result-label { font-size: var(--font-size-sm); color: var(--color-text-muted); font-weight: 600; }
.result-value { font-size: var(--font-size-lg); font-weight: 900; font-variant-numeric: tabular-nums; }
.record-hint { font-weight: 700; color: var(--color-primary); }
.over-missions { display: flex; flex-direction: column; gap: var(--space-2); }
.over-missions-done { display: flex; flex-direction: column; gap: var(--space-1); }
.over-mission-done-row { font-weight: 700; color: var(--color-secondary-dark); font-size: var(--font-size-sm); }

/* ===== 12. Tutorial callout (không che gameplay) ===== */
.tutorial-callout {
  position: absolute;
  left: 50%;
  bottom: 18%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-md);
  pointer-events: none;
}
.tutorial-callout .btn { pointer-events: auto; }
.tutorial-callout[hidden] { display: none; }
.tutorial-text { font-weight: 800; white-space: nowrap; }

/* ===== 13. Toast + banner (z 30) ===== */
.toast-container {
  position: absolute;
  top: calc(64px + env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  pointer-events: none;
  width: max-content;
  max-width: calc(100% - 32px);
}
.toast {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  background: rgba(31, 41, 55, 0.92);
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
  animation: toastIn 0.25s ease;
}
@keyframes toastIn {
  from { transform: translateY(-8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.difficulty-banner {
  position: absolute;
  top: calc(64px + env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: #FFFFFF;
  font-weight: 900;
  box-shadow: var(--shadow-md);
  pointer-events: none;
  animation: toastIn 0.25s ease;
}
.difficulty-banner[hidden] { display: none; }

/* ===== 14. Modal (z 50) ===== */
.modal {
  position: absolute;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: var(--overlay-modal);
}
.modal[hidden] { display: none; }

.modal-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.modal-title { font-size: var(--font-size-lg); }
.modal-desc { color: var(--color-text-muted); }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ===== 15. Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
body.reduced-motion *,
body.reduced-motion *::before,
body.reduced-motion *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
}