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

:root {
  --color-lectura:    #4FC3F7;
  --color-lengua:     #FFD54F;
  --color-matematicas:#FF8A65;
  --color-plastica:   #F48FB1;
  --color-ciencias:   #81C784;
  --color-ingles:     #CE93D8;
  --color-ef:         #EF5350;
  --color-musica:     #4DB6AC;

  --color-lock-bg: #1a1040;
  --color-lock-panel-from: #667eea;
  --color-lock-panel-to: #764ba2;

  --radius: 28px;
  --shadow-depth: 7px;
  --font-display: 'Fredoka One', cursive;
  --font-body:    'Nunito', sans-serif;
  --bg: #F0F4FF;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255,213,79,0.18) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(79,195,247,0.18) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(129,199,132,0.10) 0%, transparent 60%);
  min-height: 100vh;
  padding: 2.5rem 2rem 3rem;
}

/* ===== HEADER ===== */
.header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.header__deco {
  font-size: 2rem;
  letter-spacing: 0.5rem;
  display: block;
  margin-bottom: 0.4rem;
  animation: float 3s ease-in-out infinite;
}

.header__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  color: #2a2a2a;
  line-height: 1;
  letter-spacing: 3px;
  position: relative;
  display: inline-block;
}

.header__title::after {
  content: '';
  display: block;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg,
    var(--color-ef),
    var(--color-matematicas),
    var(--color-lengua),
    var(--color-ciencias),
    var(--color-lectura),
    var(--color-ingles)
  );
  margin-top: 0.3rem;
  border-radius: 99px;
}

.header__subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 800;
  color: #888;
  margin-top: 1rem;
  letter-spacing: 0.5px;
}

/* ===== GRID ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
  max-width: 1120px;
  margin: 0 auto;
}

/* ===== CARDS ===== */
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  padding: 2rem 1.2rem 1.8rem;
  border-radius: var(--radius);
  text-decoration: none;
  aspect-ratio: 1 / 1;
  position: relative;
  cursor: pointer;
  touch-action: manipulation;

  /* Toy block shadow */
  box-shadow:
    0 var(--shadow-depth) 0 rgba(0,0,0,0.20),
    0 12px 30px rgba(0,0,0,0.08);

  /* Start hidden for JS entrance */
  opacity: 0;
  transform: translateY(24px) scale(0.96);

  transition:
    transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.18s ease;
}

.card:hover {
  transform: translateY(-8px) scale(1.04) rotate(-1deg);
  box-shadow:
    0 14px 0 rgba(0,0,0,0.16),
    0 24px 40px rgba(0,0,0,0.12);
}

.card:active {
  transform: translateY(3px) scale(0.97);
  box-shadow:
    0 2px 0 rgba(0,0,0,0.20),
    0 4px 12px rgba(0,0,0,0.08);
}

/* Glossy top sheen */
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 45%;
  border-radius: var(--radius) var(--radius) 60% 60% / var(--radius) var(--radius) 30% 30%;
  background: linear-gradient(180deg, rgba(255,255,255,0.30) 0%, transparent 100%);
  pointer-events: none;
}

.card__emoji {
  font-size: clamp(3.2rem, 6vw, 5.2rem);
  line-height: 1;
  display: block;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.15));
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card:hover .card__emoji {
  transform: scale(1.15) rotate(5deg);
}

.card__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.7rem);
  color: rgba(0,0,0,0.72);
  text-align: center;
  line-height: 1.2;
  letter-spacing: 0.5px;
}

/* ===== CARD COLORS ===== */
.card--lectura     { background: var(--color-lectura); }
.card--lengua      { background: var(--color-lengua); }
.card--matematicas { background: var(--color-matematicas); }
.card--plastica    { background: var(--color-plastica); }
.card--ciencias    { background: var(--color-ciencias); }
.card--ingles      { background: var(--color-ingles); }
.card--ef          { background: var(--color-ef); }
.card--musica      { background: var(--color-musica); }

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  margin-top: 3rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: #bbb;
  letter-spacing: 1px;
}

/* ===== ANIMATIONS ===== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.card.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition:
    opacity 0.45s ease,
    transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.18s ease;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  body { padding: 1.2rem 1rem 2rem; }
  .grid { gap: 1rem; }
}

@media (max-width: 420px) {
  .grid {
    grid-template-columns: 1fr;
    max-width: 320px;
  }
  .card { aspect-ratio: 5 / 2; flex-direction: row; gap: 1.2rem; padding: 1.2rem 1.6rem; }
}

/* Desactivar hover en táctil (evita que quede "pegado" tras el tap) */
@media (hover: none) {
  .card:hover {
    transform: none;
    box-shadow:
      0 var(--shadow-depth) 0 rgba(0,0,0,0.20),
      0 12px 30px rgba(0,0,0,0.08);
  }
  .card:hover .card__emoji { transform: none; }
  .card:active {
    transform: scale(0.95);
    box-shadow:
      0 2px 0 rgba(0,0,0,0.20),
      0 4px 12px rgba(0,0,0,0.08);
  }
}

/* ===== PLACEHOLDER PAGES ===== */
.placeholder {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  text-align: center;
  padding: 2rem;
}

.placeholder__emoji { font-size: 6rem; }

.placeholder__title {
  font-family: var(--font-display);
  font-size: 3rem;
  color: #2a2a2a;
}

.placeholder__text {
  font-family: var(--font-body);
  font-size: 1.3rem;
  font-weight: 700;
  color: #777;
}

.placeholder__back {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: rgba(0,0,0,0.65);
  text-decoration: none;
  background: rgba(255,255,255,0.6);
  padding: 0.7rem 1.8rem;
  border-radius: 99px;
  box-shadow: 0 4px 0 rgba(0,0,0,0.15);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.placeholder__back:hover {
  transform: translateY(-3px);
  box-shadow: 0 7px 0 rgba(0,0,0,0.12);
}

/* ===== PIN LOCK OVERLAY ===== */
#lock-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--color-lock-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity 0.5s ease;
}

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

.lock-panel {
  background: linear-gradient(135deg, var(--color-lock-panel-from), var(--color-lock-panel-to));
  border-radius: 32px; /* slightly larger than --radius for fullscreen panel */
  padding: 40px 32px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 12px 0 rgba(0,0,0,0.25), 0 24px 48px rgba(0,0,0,0.4);
}

.lock-emoji {
  font-size: 56px;
  display: block;
  margin-bottom: 12px;
}

.lock-title {
  font-family: var(--font-display);
  color: #fff;
  font-size: 28px;
  margin-bottom: 4px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.lock-subtitle {
  font-family: var(--font-body);
  color: rgba(255,255,255,0.8);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 28px;
}

.lock-dots {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 28px;
}

.lock-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.6);
  background: transparent;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.lock-dot.filled {
  background: #fff;
  border-color: #fff;
  box-shadow: 0 0 12px rgba(255,255,255,0.6);
}

.lock-keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.lock-key {
  background: rgba(255,255,255,0.15);
  border: none;
  border-radius: 16px;
  color: #fff;
  font-family: var(--font-display);
  font-size: 26px;
  padding: 16px 0;
  cursor: pointer;
  box-shadow: 0 4px 0 rgba(0,0,0,0.2);
  transition: transform 0.1s, box-shadow 0.1s;
  touch-action: manipulation;
}

.lock-key:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.2);
}

.lock-key--empty {
  background: transparent;
  box-shadow: none;
  cursor: default;
  pointer-events: none;
}

.lock-key--delete {
  font-size: 20px;
}

.lock-message {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
  min-height: 20px;
}

.lock-message--error  { color: #FFB3B3; }
.lock-message--success { color: #B3FFD1; }

@keyframes lock-shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-8px); }
  40%       { transform: translateX(8px); }
  60%       { transform: translateX(-6px); }
  80%       { transform: translateX(6px); }
}

.lock-shake {
  animation: lock-shake 0.4s ease;
}

@media (max-width: 400px) {
  .lock-panel { padding: 28px 20px; }
  .lock-title  { font-size: 22px; }
  .lock-key    { font-size: 22px; padding: 12px 0; }
}