/* === EYE SAFETY DESIGN SYSTEM === */
/* Based on WHO, AAP, WCAG 2.2, and pediatric UX research */
/* All colors: HSL saturation <= 60%, warm tones dominant */
/* All animations: 300-500ms, zero flashing, ease-out curves */
/* All text: minimum 28px, titles 48-64px, rounded sans-serif */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap');

:root {
  /* Palette — warm pastels, saturation <= 60% */
  --bg-primary: #FFF8F0;
  --bg-secondary: #FFF0E6;
  --bg-card: #FFFFFF;

  --peach: hsl(20, 55%, 85%);
  --mint: hsl(150, 40%, 82%);
  --lavender: hsl(270, 40%, 85%);
  --butter: hsl(45, 55%, 85%);
  --sky: hsl(200, 45%, 84%);
  --rose: hsl(340, 45%, 85%);
  --sage: hsl(120, 30%, 80%);
  --coral: hsl(10, 50%, 82%);

  /* Text — high contrast on warm background */
  --text-primary: hsl(20, 20%, 25%);       /* ~4.5:1 on bg-primary */
  --text-secondary: hsl(20, 15%, 40%);
  --text-accent: hsl(20, 40%, 45%);

  /* Feedback colors — muted */
  --success: hsl(140, 40%, 65%);
  --gentle-shake: hsl(20, 40%, 75%);

  /* Animation — safe speeds */
  --transition-fast: 300ms ease-out;
  --transition-normal: 400ms ease-out;
  --transition-slow: 500ms ease-out;
  --scene-fade: 500ms ease-in-out;

  /* Typography */
  --font-family: 'Nunito', 'Quicksand', system-ui, sans-serif;
  --font-size-body: 28px;
  --font-size-large: 40px;
  --font-size-title: 56px;
  --font-size-hero: 72px;
  --font-weight-normal: 600;
  --font-weight-bold: 800;
  --line-height: 1.6;

  /* Spacing */
  --space-sm: 12px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 72px;

  /* Borders */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --radius-round: 50%;

  /* Shadows — soft, warm */
  --shadow-sm: 0 2px 8px hsla(20, 30%, 50%, 0.08);
  --shadow-md: 0 4px 16px hsla(20, 30%, 50%, 0.12);
  --shadow-lg: 0 8px 32px hsla(20, 30%, 50%, 0.15);
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden; /* Toddlers shouldn't scroll */
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height);
  color: var(--text-primary);
  background: var(--bg-primary);
  cursor: none; /* We'll show a custom large cursor */
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* === CUSTOM CURSOR (large, friendly) === */
.cursor {
  position: fixed;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--coral);
  opacity: 0.7;
  pointer-events: none;
  z-index: 9999;
  transition: transform 80ms ease-out, opacity 200ms ease-out;
  transform: translate(-50%, -50%);
}

.cursor--click {
  transform: translate(-50%, -50%) scale(1.3);
}

/* === CORNER MOUSE EASTER EGG === */
.cursor--cheese {
  background: transparent;
  width: auto;
  height: auto;
  font-size: 40px;
  line-height: 1;
  opacity: 1;
}

.corner-mouse {
  position: fixed;
  font-size: 48px;
  line-height: 1;
  pointer-events: none;
  z-index: 98;
  opacity: 0;
  transition: opacity 300ms ease-out, top 300ms ease-out, bottom 300ms ease-out, left 300ms ease-out, right 300ms ease-out;
}

.corner-mouse--tl { top: -48px; left: -48px; }
.corner-mouse--tr { top: -48px; right: -48px; }
.corner-mouse--bl { bottom: -48px; left: -48px; }
.corner-mouse--br { bottom: -48px; right: -48px; }

.corner-mouse--visible { opacity: 1; }
.corner-mouse--visible.corner-mouse--tl { top: 8px; left: 8px; }
.corner-mouse--visible.corner-mouse--tr { top: 8px; right: 8px; }
.corner-mouse--visible.corner-mouse--bl { bottom: 8px; left: 8px; }
.corner-mouse--visible.corner-mouse--br { bottom: 8px; right: 8px; }

/* === APP SHELL === */
#app {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* === SCREEN CONTAINER (all phases render here) === */
.screen {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  opacity: 0;
  transition: opacity var(--scene-fade);
  pointer-events: none;
}

.screen--active {
  opacity: 1;
  pointer-events: auto;
}

/* === FADE THROUGH WHITE TRANSITION === */
.screen--exiting {
  opacity: 0;
}

/* === TYPOGRAPHY === */
.text-hero {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.text-title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-bold);
}

.text-large {
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-normal);
}

.text-body {
  font-size: var(--font-size-body);
}

/* === KEY LABEL (corner indicator) === */
.key-label {
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-bold);
  color: var(--text-secondary);
  opacity: 0.5;
  background: var(--bg-card);
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* === ANIMAL REVEAL (Phase 1 keyboard) === */
.animal-reveal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  animation: fadeScaleIn var(--transition-normal) forwards;
}

.animal-reveal__image {
  width: min(65vw, 55vh, 240px);
  height: min(65vw, 55vh, 240px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.animal-reveal__name {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

@keyframes fadeScaleIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeScaleOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* === DRAWING CANVAS (Phase 1 trackpad) === */
.drawing-canvas {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

/* === FLASHLIGHT / REVEAL MODE === */
.fog-layer {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: var(--bg-primary);
  mask-image: radial-gradient(circle 20vmin at var(--reveal-x, 50%) var(--reveal-y, 50%), transparent 0%, black 100%);
  -webkit-mask-image: radial-gradient(circle 20vmin at var(--reveal-x, 50%) var(--reveal-y, 50%), transparent 0%, black 100%);
  pointer-events: none;
  z-index: 10;
}

/* === DOORS GAME (Phase 2) === */
.doors-scene {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--space-xl);
}

.door {
  width: min(25vw, 20vh, 160px);
  height: min(35vw, 28vh, 220px);
  perspective: 600px;
  cursor: pointer;
}

.door__panel {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: var(--peach);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal);
  transform-origin: left center;
  position: relative;
  z-index: 2;
}

.door--open .door__panel {
  transform: rotateY(-110deg);
}

.door__behind {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Door wobble invitation animation — slow, gentle */
@keyframes wobble {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(1.5deg); }
  75% { transform: rotate(-1.5deg); }
}

.door:not(.door--open) {
  animation: wobble 3s ease-in-out infinite;
}

/* === EXPLORATION SCENE (Phase 2) === */
.exploration-scene {
  width: 100%;
  height: 100%;
  position: relative;
}

.hotspot {
  position: absolute;
  cursor: pointer;
  border-radius: var(--radius-round);
  transition: box-shadow var(--transition-fast);
}

.hotspot::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: inherit;
  border: 3px solid var(--butter);
  opacity: 0;
  animation: pulse-glow 2.5s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.05); }
}

.hotspot--found::after {
  animation: none;
  opacity: 0;
}

/* === MATCHING GAME (Phase 2) === */
.matching-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  padding: var(--space-lg);
}

.matching-row {
  display: flex;
  gap: var(--space-lg);
}

.match-card {
  width: min(22vw, 20vh, 160px);
  height: min(22vw, 20vh, 160px);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-sm);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-bold);
}

.match-card:hover,
.match-card--selected {
  box-shadow: var(--shadow-lg);
}

.match-card--correct {
  background: var(--success);
}

@keyframes gentleShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.match-card--wrong {
  animation: gentleShake 200ms ease-out;
}

/* === PROGRESS DOTS === */
.progress-dots {
  position: fixed;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
}

.progress-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-secondary);
  transition: background var(--transition-fast);
}

.progress-dot--filled {
  background: var(--coral);
}

/* === SESSION TIMER === */
.timer-display {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  font-size: 20px;
  color: var(--text-secondary);
  opacity: 0.4;
  font-variant-numeric: tabular-nums;
  z-index: 99;
  transition: all var(--transition-normal);
}

.timer-display--dimming {
  opacity: 1;
  font-size: 28px;
  color: var(--coral);
  animation: timer-pulse 2s ease-in-out infinite;
}

@keyframes timer-pulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* === WIND-DOWN OVERLAY === */
.wind-down {
  position: fixed;
  inset: 0;
  background: hsla(30, 30%, 20%, 0);
  transition: background 3s linear;
  pointer-events: none;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-lg);
}

.wind-down--dimming {
  background: hsla(30, 30%, 20%, 0.25);
}

.wind-down--ended {
  background: var(--bg-primary);
  pointer-events: auto;
  transition: background 0.3s linear;
}

/* === PARENT SETTINGS PANEL === */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: hsla(20, 20%, 20%, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.settings-overlay--open {
  opacity: 1;
  pointer-events: auto;
}

.settings-panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-lg);
  max-width: 480px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  font-size: 18px;
}

.settings-panel h2 {
  font-size: 24px;
  margin-bottom: var(--space-md);
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--bg-secondary);
}

.setting-row label {
  font-size: 16px;
  color: var(--text-secondary);
}

/* Toggle switch */
.toggle {
  position: relative;
  width: 52px;
  height: 28px;
  background: var(--bg-secondary);
  border-radius: 14px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle--on {
  background: var(--success);
}

.toggle__knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: white;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.toggle--on .toggle__knob {
  transform: translateX(24px);
}

/* === CELEBRATION === */
@keyframes float-up {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-120px) scale(0.6);
  }
}

.celebration-particle {
  position: fixed;
  font-size: 32px;
  pointer-events: none;
  animation: float-up 1.5s ease-out forwards;
  z-index: 50;
}

/* === PHASE 3: FAMILY PHOTO === */
.family-photo {
  width: min(50vw, 45vh, 220px);
  height: min(50vw, 45vh, 220px);
  border-radius: var(--radius-round);
  object-fit: cover;
  border: 6px solid var(--peach);
  box-shadow: var(--shadow-md);
}

/* === HEART ANIMATION === */
@keyframes heart-pop {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.heart {
  font-size: 48px;
  animation: heart-pop 400ms ease-out forwards;
}

/* === GAME MENU (Phase 2 selector) === */
.game-menu {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--space-xl);
}

.game-menu__card {
  width: min(30vw, 28vh, 220px);
  height: min(30vw, 28vh, 220px);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-md);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.game-menu__card:hover {
  box-shadow: var(--shadow-lg);
}

.game-menu__icon {
  font-size: min(24vw, 20vh, 176px);
  transform: scale(0.5);
  transform-origin: center;
}

/* === WELCOME SCREEN === */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
}

.welcome__prompt {
  font-size: var(--font-size-large);
  color: var(--text-secondary);
  animation: pulse-glow 3s ease-in-out infinite;
}