/* css/styles.css - Aetherwing: Aurora Highlands Design System */

:root {
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Theme Colors */
  --bg-dark: #070b14;
  --panel-bg: rgba(12, 20, 36, 0.75);
  --panel-border: rgba(0, 240, 255, 0.2);
  --panel-border-glow: rgba(0, 240, 255, 0.4);
  --panel-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.12);

  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.6);
  --accent-violet: #9d4edd;
  --accent-gold: #ffe600;
  --accent-amber: #fb8500;
  --accent-emerald: #00ffa3;
  --accent-crimson: #ff0055;

  --text-primary: #f0f6fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --focus-ring: 0 0 0 3px rgba(0, 240, 255, 0.6);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  font-family: var(--font-body);
  color: var(--text-primary);
  touch-action: manipulation;
}

/* App Container */
#game-container {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 100vw;
  max-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background: radial-gradient(circle at 50% 30%, #101c36 0%, #060913 100%);
}

/* Canvas viewport */
#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

/* Fullscreen Flash Overlay for impacts and stage changes */
#flash-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
  opacity: 0;
  background-color: #ffffff;
  transition: opacity 0.25s ease-out;
}

#flash-overlay.active-flash {
  opacity: 0.85;
  transition: none;
}

#flash-overlay.stage-flash {
  background-color: var(--accent-cyan);
  opacity: 0.65;
  transition: none;
}

/* Minimal, ultra-readable HUD */
#game-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  z-index: 10;
  pointer-events: none;
}

.hud-group {
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
}

.hud-card {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.hud-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-weight: 700;
}

.hud-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  text-shadow: 0 0 10px var(--accent-cyan-glow);
}

.hud-value.best {
  color: var(--accent-gold);
  text-shadow: 0 0 8px rgba(255, 230, 0, 0.5);
}

/* Difficulty & Stage Badges */
.hud-badge {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  font-family: var(--font-display);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(15, 23, 42, 0.85);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.badge-stage {
  color: var(--accent-cyan);
  border-color: rgba(0, 240, 255, 0.35);
  background: rgba(0, 240, 255, 0.1);
}

.badge-difficulty {
  color: var(--accent-violet);
  border-color: rgba(157, 78, 221, 0.4);
}

/* FLOW Meter Indicator */
#hud-flow {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 230, 0, 0.12);
  border: 1px solid rgba(255, 230, 0, 0.4);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 0 14px rgba(255, 230, 0, 0.3);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

#hud-flow.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
}

.flow-pips {
  display: flex;
  gap: 4px;
}

.flow-pip {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 230, 0, 0.25);
  border: 1px solid var(--accent-gold);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.flow-pip.active {
  background: var(--accent-gold);
  box-shadow: 0 0 6px var(--accent-gold);
  transform: scale(1.15);
}

/* HUD Buttons */
.hud-btn {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.hud-btn:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  transform: translateY(-2px);
}

.hud-btn:active {
  transform: translateY(1px);
}

.hud-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Modals & Screens System */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Ready Screen Transparent Overlay */
#screen-ready {
  background: transparent;
  pointer-events: none;
}

.ready-content {
  text-align: center;
  animation: pulseFloat 2s ease-in-out infinite;
}

.ready-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: #fff;
  text-shadow: 0 0 20px var(--accent-cyan-glow);
  margin-bottom: 8px;
}

.ready-prompt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(12, 20, 36, 0.8);
  border: 1px solid var(--accent-cyan);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
}

/* Glassmorphic Panel Cards */
.panel {
  background: var(--panel-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--panel-shadow);
  padding: 32px 36px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: modalEnter 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.panel-header {
  text-align: center;
}

.game-logo-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: linear-gradient(135deg, #ffffff 10%, var(--accent-cyan) 60%, var(--accent-violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 14px rgba(0, 240, 255, 0.4));
  line-height: 1.1;
}

.game-tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 4px;
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
}

/* Segmented Control for Difficulty */
.segmented-control {
  display: flex;
  background: rgba(4, 9, 20, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 4px;
}

.seg-btn {
  flex: 1;
  padding: 8px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.seg-btn:hover {
  color: #fff;
}

.seg-btn.active {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.25), rgba(157, 78, 221, 0.25));
  color: #fff;
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

/* Buttons System */
.btn-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.btn:focus-visible, .seg-btn:focus-visible, .hud-btn:focus-visible {
  box-shadow: var(--focus-ring);
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #0077b6 100%);
  color: #030814;
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 26px rgba(0, 240, 255, 0.6);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: #fff;
  transform: translateY(-2px);
}

.btn-danger {
  background: rgba(255, 0, 85, 0.15);
  border-color: rgba(255, 0, 85, 0.4);
  color: #ff4d79;
}

.btn-danger:hover {
  background: rgba(255, 0, 85, 0.25);
  border-color: #ff0055;
  box-shadow: 0 0 14px rgba(255, 0, 85, 0.4);
}

/* Stats Grids */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-box {
  background: rgba(5, 10, 22, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  text-align: center;
}

.stat-box.highlight {
  border-color: var(--accent-gold);
  background: rgba(255, 230, 0, 0.08);
  box-shadow: 0 0 14px rgba(255, 230, 0, 0.2);
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
}

/* Game Over Screen Specifics */
.gameover-summary {
  display: flex;
  justify-content: space-around;
  background: rgba(0, 0, 0, 0.35);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.summary-col {
  text-align: center;
}

.summary-val {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
}

.new-record-tag {
  display: inline-block;
  background: var(--accent-gold);
  color: #050814;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  margin-top: 4px;
  animation: pulseGlow 1.2s infinite alternate;
}

/* Run Achievements List */
.achievements-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.achievements-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  font-weight: 700;
}

.achievements-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 140px;
  overflow-y: auto;
}

.achievement-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.ach-icon {
  font-size: 1.3rem;
  color: var(--accent-gold);
}

.ach-text {
  display: flex;
  flex-direction: column;
}

.ach-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.ach-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* Settings Form Controls */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setting-label {
  font-size: 0.9rem;
  font-weight: 600;
}

.setting-desc {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Switch Toggle */
.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition-fast);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: #fff;
  transition: var(--transition-fast);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #050b14;
}

/* Volume Slider */
.volume-slider-container {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 160px;
}

.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.2);
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-cyan-glow);
}

/* Animations */
@keyframes modalEnter {
  from {
    opacity: 0;
    transform: scale(0.94) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes pulseFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes pulseGlow {
  from {
    box-shadow: 0 0 6px rgba(255, 230, 0, 0.5);
  }
  to {
    box-shadow: 0 0 16px rgba(255, 230, 0, 0.9);
  }
}

/* Reduced Motion Mode overrides */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.reduced-motion * {
  animation: none !important;
}

/* Responsive Breakpoints */
@media (max-width: 480px) {
  #game-hud {
    padding: 10px 12px;
  }
  .hud-card {
    padding: 6px 10px;
  }
  .hud-value {
    font-size: 1.3rem;
  }
  .panel {
    padding: 24px 20px;
  }
  .game-logo-title {
    font-size: 1.9rem;
  }
}