/* =========================
   Variables (tema claro)
========================= */
:root {
  --bg: #f6f7fb;
  --text: #1f2937;
  --card-bg: #ffffff;
  --card-bd: #e5e7eb;
  --accent: #4caf50;
  --accent-strong: #2e7d32;
  --header-bd: #a78bfa;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 24px rgba(76, 175, 80, 0.35);
}

/* Fondo general con degradado */
html,
body {
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
}

/* =========================
   Header con degradado animado
========================= */
header {
  width: 100%;
  padding: 16px;
  background: linear-gradient(-45deg, #a18cd1, #fbc2eb, #8ec5fc, #b2fefa);
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  border-bottom: 3px solid var(--header-bd);
  text-align: center;
}
@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

header nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
header nav a {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: #111;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-sm);
  transition: transform 0.06s ease, filter 0.2s ease;
}
header nav a:hover {
  filter: brightness(0.98);
}
header nav a:active {
  transform: scale(0.98);
}

h1 {
  margin: 10px 0 6px 0;
  font-size: clamp(40px, 5vw, 36px);
  line-height: 1.15;
}

/* Botón activar sonido */
#activar-sonido {
  margin: 8px auto 0;
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: #4caf50;
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: filter 0.2s ease, transform 0.06s ease;
}
#activar-sonido:hover {
  filter: brightness(0.95);
}
#activar-sonido:active {
  transform: scale(0.98);
}

/* =========================
   Grid de tarjetas
========================= */
.cuerpo1 {
  width: 100%;
  margin: 0 auto;
  padding: 16px 24px; /* 👈 más padding lateral */
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px; /* 👈 un poquito más de espacio entre tarjetas */
  overflow: visible;
  box-sizing: border-box;
}

/* Tarjeta alumno */
.alumnos {
  width: 100%;
  padding: 12px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 2px solid var(--card-bd);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
  will-change: transform;
  transition: box-shadow 0.2s ease, transform 0.08s ease, border-color 0.2s ease;
}
.alumnos:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
}

.notas label {
  display: block;
  font-weight: 800;
  margin-bottom: 8px;
  font-size: 16px;
}

/* Colores alternados por tarjeta (borde e input) */
.alumnos:nth-child(1n) {
  border-color: #4caf50;
}
.alumnos:nth-child(2n) {
  border-color: #2196f3;
}
.alumnos:nth-child(3n) {
  border-color: #ff9800;
}
.alumnos:nth-child(4n) {
  border-color: #e91e63;
}
.alumnos:nth-child(1n) .nota-input {
  border-color: #4caf50;
}
.alumnos:nth-child(2n) .nota-input {
  border-color: #2196f3;
}
.alumnos:nth-child(3n) .nota-input {
  border-color: #ff9800;
}
.alumnos:nth-child(4n) .nota-input {
  border-color: #e91e63;
}

/* Imagen responsiva */
.alumnos_fotos {
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: contain;
  border-radius: 10px;
  margin-top: 10px;
}

/* =========================
   Puntaje / input lectura
========================= */
.nota-row {
  display: flex;
  justify-content: center;
}

.nota-input {
  width: 100%;
  max-width: 280px;
  height: 72px;
  font-size: 38px;
  font-weight: 900;
  text-align: center;
  color: #111;
  background: #fdfdfd;
  border: 3px solid var(--accent);
  border-radius: 12px;
  caret-color: transparent;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.03);
}
.nota-input[readonly]:focus {
  outline: none;
}

/* Quitar flechas del type=number */
.nota-input[type="number"]::-webkit-outer-spin-button,
.nota-input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.nota-input[type="number"] {
  -moz-appearance: textfield;
}

/* =========================
   Animaciones de cambio
========================= */
.alumnos.pop {
  animation: pop-burst 480ms ease-out;
  z-index: 1;
}
@keyframes pop-burst {
  0% {
    transform: scale(1);
    box-shadow: var(--shadow-sm);
  }
  40% {
    transform: scale(1.06);
    box-shadow: var(--shadow-lg);
  }
  100% {
    transform: scale(1);
    box-shadow: var(--shadow-sm);
  }
}

.nota-input.bounce {
  animation: bounce-num 420ms ease-out;
}
@keyframes bounce-num {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.18);
  }
  100% {
    transform: scale(1);
  }
}

/* =========================
   Badge de posición (ranking)
========================= */
.rank-badge {
  margin-top: 8px;
  padding: 6px 12px;
  border-radius: 9999px;
  border: 2px solid var(--card-bd);
  background: #fff;
  font-weight: 900;
  text-align: center;
  width: fit-content;
  margin-inline: auto;
  font-size: 40px;
  box-shadow: var(--shadow-sm);
}
.alumnos[data-rank="1"] .rank-badge {
  border-color: #d4af37;
  background: linear-gradient(135deg, #ffe98a, #ffd54f);
  color: #3b2f00;
}
.alumnos[data-rank="2"] .rank-badge {
  border-color: #c0c0c0;
  background: linear-gradient(135deg, #f0f0f0, #dfe3ea);
  color: #232323;
}
.alumnos[data-rank="3"] .rank-badge {
  border-color: #cd7f32;
  background: linear-gradient(135deg, #ffddb8, #e3a770);
  color: #4a2d00;
}

/* Suma general (si la usas) */
.total-general {
  text-align: center;
  font-weight: 800;
  margin-top: 6px;
}

/* Responsive fino */
@media (max-width: 480px) {
  .alumnos_fotos {
    max-height: 240px;
  }
  .nota-input {
    height: 64px;
    font-size: 34px;
  }
}

/* ====== Header con logo ====== */
.header-content {
  display: flex;
  align-items: center;
  justify-content: center; /* centra horizontalmente */
  gap: 16px; /* espacio entre logo y título */
  flex-wrap: wrap; /* se acomoda en móvil */
}

.logo {
  height: 80px;
  width: auto;
  border-radius: 50%; /* círculo */
  background: #fff; /* aro blanco */
  padding: 6px; /* espacio entre imagen y borde */
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25); /* sombra */
}

@media (max-width: 480px) {
  .logo {
    height: 40px; /* más pequeño en móvil */
  }
  .header-content h1 {
    font-size: clamp(22px, 5vw, 38px);
    font-weight: 900;
    color: #222;
  }
}
/* AGRAGADO ULTIMAMENTE*/
/* Animación cuando el alumno gana puntos */
.alumnos.gana-puntos {
  animation: sgmGanapuntos 0.8s ease-out;
  box-shadow: 0 0 18px rgba(255, 215, 0, 0.9);
}

@keyframes sgmGanapuntos {
  0% {
    transform: scale(1);
    background-color: transparent;
  }
  20% {
    transform: scale(1.08);
    background-color: rgba(255, 255, 0, 0.2);
  }
  50% {
    transform: scale(1.03);
    background-color: rgba(0, 255, 127, 0.2);
  }
  80% {
    transform: scale(1.06);
    background-color: rgba(135, 206, 250, 0.2);
  }
  100% {
    transform: scale(1);
    background-color: transparent;
  }
}