/* ===================================
   FRUIT NINJA - STYLE.CSS
   Dark/Light themes via CSS custom properties
   FUCK Khamenei
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Bangers&family=Vazirmatn:wght@400;600;700;900&display=swap');

/* ---- CSS Variables / Themes ---- */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #111130;
  --bg-panel: rgba(10, 10, 30, 0.92);
  --accent-1: #ff4c6a;
  --accent-2: #ffca28;
  --accent-3: #00e5ff;
  --text-primary: #ffffff;
  --text-secondary: #aab4d0;
  --card-bg: rgba(255,255,255,0.06);
  --card-hover: rgba(255,255,255,0.12);
  --card-selected: rgba(255,76,106,0.25);
  --card-border: rgba(255,255,255,0.12);
  --card-border-selected: #ff4c6a;
  --btn-bg: linear-gradient(135deg, #ff4c6a, #ff8f00);
  --btn-shadow: 0 4px 24px rgba(255,76,106,0.4);
  --glow: #ff4c6a;
  --overlay-bg: rgba(0,0,0,0.7);
  --blur-panel-bg: rgba(10,10,30,0.88);
  --border-panel: rgba(255,255,255,0.15);
}

[data-theme="light"] {
  --bg-primary: #f0f2f8;
  --bg-secondary: #e2e6f0;
  --bg-panel: rgba(240,242,248,0.96);
  --text-primary: #111130;
  --text-secondary: #445580;
  --card-bg: rgba(0,0,0,0.05);
  --card-hover: rgba(0,0,0,0.1);
  --card-selected: rgba(255,76,106,0.15);
  --card-border: rgba(0,0,0,0.12);
  --card-border-selected: #ff4c6a;
  --overlay-bg: rgba(240,242,248,0.8);
  --blur-panel-bg: rgba(240,242,248,0.94);
  --border-panel: rgba(0,0,0,0.15);
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  /* min-height به جای height — اجازه اسکرول در صفحه اول */
  min-height: 100%;
  overflow-x: hidden;
  font-family: 'Vazirmatn', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

/* ---- Welcome Page (index.html) ---- */
.welcome-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-primary);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(255,76,106,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(0,229,255,0.1) 0%, transparent 50%);
  padding: 2rem 1rem 4rem;
  position: relative;
  /* overflow: hidden حذف شد — صفحه اول باید اسکرول داشته باشد */
}

.welcome-page::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.game-logo {
  text-align: center;
  margin-bottom: 2.5rem;
  animation: logoEntrance 0.8s cubic-bezier(0.34,1.56,0.64,1) both;
}

@keyframes logoEntrance {
  from { transform: scale(0.5) translateY(-30px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}

.game-logo h1 {
  font-family: 'Bangers', cursive;
  font-size: clamp(3rem, 10vw, 6rem);
  letter-spacing: 0.04em;
  line-height: 1;
  background: linear-gradient(135deg, #ff4c6a 0%, #ffca28 50%, #ff4c6a 100%);
  background-size: 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
  text-shadow: none;
  filter: drop-shadow(0 0 20px rgba(255,76,106,0.5));
}

@keyframes shimmer {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

.game-logo .tagline {
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.5rem;
}

/* ---- Selection Panel ---- */
.selection-panel {
  width: 100%;
  max-width: 800px;
  animation: fadeUp 0.6s 0.3s cubic-bezier(0.34,1.56,0.64,1) both;
}

@keyframes fadeUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.section-label {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--card-border);
}

/* Select All */
.select-all-row {
  margin-bottom: 1.25rem;
}

.select-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  border-radius: 2rem;
  color: var(--text-primary);
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.select-all-btn:hover {
  background: var(--card-hover);
  border-color: var(--accent-1);
}

.select-all-btn.active {
  background: var(--card-selected);
  border-color: var(--card-border-selected);
  color: var(--accent-1);
}

/* ---- Image Grid ---- */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.image-card {
  position: relative;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  border-radius: 1rem;
  padding: 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  transition: all 0.25s cubic-bezier(0.34,1.56,0.64,1);
  user-select: none;
}

.image-card:hover {
  background: var(--card-hover);
  transform: translateY(-4px) scale(1.03);
  border-color: rgba(255,255,255,0.3);
}

.image-card.selected {
  background: var(--card-selected);
  border-color: var(--card-border-selected);
  box-shadow: 0 0 20px rgba(255,76,106,0.3), inset 0 0 10px rgba(255,76,106,0.05);
  transform: translateY(-4px) scale(1.05);
}

.image-card img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 0.5rem;
  pointer-events: none;
}

.image-card .card-name {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.image-card .check-icon {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-1);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: all 0.2s cubic-bezier(0.34,1.56,0.64,1);
}

.image-card.selected .check-icon {
  opacity: 1;
  transform: scale(1);
}

.check-icon svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: white;
  stroke-width: 2.5;
}

/* ---- Start Button ---- */
.start-btn {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto 2rem;
  padding: 1rem 2rem;
  font-family: 'Bangers', cursive;
  font-size: 2rem;
  letter-spacing: 0.1em;
  color: white;
  background: var(--btn-bg);
  border: none;
  border-radius: 3rem;
  cursor: pointer;
  box-shadow: var(--btn-shadow), 0 2px 0 rgba(0,0,0,0.3);
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.start-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.start-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 32px rgba(255,76,106,0.6), 0 2px 0 rgba(0,0,0,0.3);
}

.start-btn:active {
  transform: translateY(1px) scale(0.98);
}

.start-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ---- Preload Progress ---- */
.preload-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  z-index: 1000;
  transition: opacity 0.5s;
}

.preload-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.preload-logo {
  font-family: 'Bangers', cursive;
  font-size: 3rem;
  color: var(--accent-1);
  letter-spacing: 0.05em;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.progress-bar-wrap {
  width: 240px;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  border-radius: 3px;
  transition: width 0.3s ease;
}

.preload-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

/* =====================
   GAME PAGE (game.html)
   ===================== */
.game-page {
  position: fixed;
  inset: 0;
  background: #05050f;
  overflow: hidden;
  cursor: crosshair;
}

#game-canvas {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  touch-action: none;
  display: block;
}

/* ---- HUD ---- */
.hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.score-display {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  flex-direction: column;
  pointer-events: none;
}

.score-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

.score-value {
  font-family: 'Bangers', cursive;
  font-size: 3.5rem;
  line-height: 1;
  color: #fff;
  text-shadow: 0 0 20px rgba(255,202,40,0.6);
  letter-spacing: 0.02em;
}

.combo-display {
  font-family: 'Bangers', cursive;
  font-size: 1.4rem;
  color: var(--accent-2);
  letter-spacing: 0.05em;
  min-height: 2rem;
  transition: opacity 0.3s;
}

.rank-display {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  font-family: 'Bangers', cursive;
  font-size: clamp(2.5rem, 8vw, 5rem);
  letter-spacing: 0.05em;
  color: var(--accent-2);
  text-shadow: 0 0 30px rgba(255,202,40,0.8), 0 2px 0 rgba(0,0,0,0.5);
  pointer-events: none;
  white-space: nowrap;
  z-index: 50;
  transition: none;
}

.rank-display.show {
  animation: rankPop 2.5s cubic-bezier(0.34,1.56,0.64,1) both;
}

@keyframes rankPop {
  0%   { transform: translate(-50%,-50%) scale(0) rotate(-10deg); opacity:0; }
  20%  { transform: translate(-50%,-50%) scale(1.15) rotate(2deg); opacity:1; }
  30%  { transform: translate(-50%,-50%) scale(0.95) rotate(0deg); opacity:1; }
  40%  { transform: translate(-50%,-50%) scale(1.05) rotate(-1deg); opacity:1; }
  70%  { transform: translate(-50%,-50%) scale(1) rotate(0deg); opacity:1; }
  100% { transform: translate(-50%,-50%) scale(1.2) rotate(0deg); opacity:0; }
}

/* ---- Settings Button ---- */
.settings-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.2);
  color: white;
  cursor: pointer;
  pointer-events: all;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  backdrop-filter: blur(8px);
}

.settings-btn:hover {
  background: rgba(255,255,255,0.2);
  transform: rotate(30deg);
}

/* ---- Settings Panel ---- */
.panel-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.panel-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.settings-panel {
  background: var(--blur-panel-bg);
  border: 1px solid var(--border-panel);
  border-radius: 1.5rem;
  padding: 2rem;
  width: min(420px, calc(100vw - 2rem));
  max-height: 85vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

.panel-overlay.open .settings-panel {
  transform: scale(1) translateY(0);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.panel-title {
  font-family: 'Bangers', cursive;
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  color: var(--accent-1);
}

.panel-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.2s;
}

.panel-close:hover {
  background: var(--card-hover);
  transform: scale(1.1);
}

.panel-section {
  margin-bottom: 1.5rem;
}

.panel-section-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

/* Toggle Row */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--card-border);
}

.toggle-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toggle {
  position: relative;
  width: 48px;
  height: 26px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 26px;
  cursor: pointer;
  transition: 0.3s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

.toggle input:checked + .toggle-slider {
  background: var(--accent-1);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

/* Theme Switcher */
.theme-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.theme-btn {
  flex: 1;
  padding: 0.6rem;
  border-radius: 0.75rem;
  border: 2px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text-primary);
  font-family: 'Vazirmatn', sans-serif;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-btn.active {
  border-color: var(--accent-1);
  background: var(--card-selected);
}

/* About Section */
.about-box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 1rem;
}

.about-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-3);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.95rem;
  transition: opacity 0.2s;
}

.about-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ---- Fullscreen Hint ---- */
.fs-hint {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  padding: 0.4rem 0.8rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 0.5rem;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  pointer-events: all;
  cursor: pointer;
  transition: all 0.2s;
}

.fs-hint:hover {
  background: rgba(255,255,255,0.14);
  color: rgba(255,255,255,0.7);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .image-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .score-value {
    font-size: 2.5rem;
  }

  .settings-btn {
    width: 44px;
    height: 44px;
  }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 3px; }

/* ──────────────────────────────────────
   Difficulty Selection Grid
   ────────────────────────────────────── */
.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}

@media (max-width: 560px) {
  .difficulty-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.diff-card {
  position: relative;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  border-radius: 1rem;
  padding: 1rem 0.75rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.25s cubic-bezier(0.34,1.56,0.64,1);
  color: var(--text-primary);
  font-family: 'Vazirmatn', sans-serif;
}

.diff-card:hover {
  background: var(--card-hover);
  transform: translateY(-3px) scale(1.03);
}

.diff-card.active {
  background: var(--card-selected);
  border-color: var(--card-border-selected);
  box-shadow: 0 0 18px rgba(255,76,106,0.35);
  transform: translateY(-3px) scale(1.05);
}

/* Color-coded active states per difficulty */
.diff-card[data-diff="easy"].active   { border-color: #4caf50; box-shadow: 0 0 18px rgba(76,175,80,0.4); }
.diff-card[data-diff="medium"].active { border-color: #ff9800; box-shadow: 0 0 18px rgba(255,152,0,0.4); }
.diff-card[data-diff="hard"].active   { border-color: #ff4c6a; box-shadow: 0 0 18px rgba(255,76,106,0.4); }
.diff-card[data-diff="pro"].active    { border-color: #9c27b0; box-shadow: 0 0 18px rgba(156,39,176,0.5); }

.diff-emoji {
  font-size: 1.8rem;
  line-height: 1;
}

.diff-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.diff-desc {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.3;
}

.diff-badge {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1.5px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(6px);
  pointer-events: none;
  white-space: nowrap;
}

.diff-badge[data-diff="easy"]   { background: rgba(76,175,80,0.2);  border-color: #4caf50; color: #81c784; }
.diff-badge[data-diff="medium"] { background: rgba(255,152,0,0.2);  border-color: #ff9800; color: #ffb74d; }
.diff-badge[data-diff="hard"]   { background: rgba(255,76,106,0.2); border-color: #ff4c6a; color: #ff8a9b; }
.diff-badge[data-diff="pro"]    { background: rgba(156,39,176,0.2); border-color: #9c27b0; color: #ce93d8; }

.current-diff-display {
  padding: 0.6rem 1rem;
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  border-radius: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  color: var(--text-primary);
}