/* HOJA DE ESTILOS */

:root {
  --azul-fondo: #607EDB;
  --amarillo-acento: #FFF176;
  --blanco-texto: #F9F9F9;
}

body {
  font-family: Arial, sans-serif;
  color: var(--blanco-texto);
  margin: 0;
  min-height: 100vh;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  overflow-x: hidden;
}

/* Fondo mosaico adaptable y proporcional */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background-image: url('logo.jpeg');
  background-repeat: repeat;
  background-size: clamp(80px, 10vw, 150px) auto;
  background-position: top left;
  opacity: 0.25;
  z-index: -2;
  pointer-events: none;
}

/* Capa oscura */
body::after {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background-color: rgba(0,0,0,0.3);
  z-index: -1;
  pointer-events: none;
}

.centered {
  max-width: 400px;
  background: var(--azul-fondo);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0,0,0,0.25);
  z-index: 1;
}

h1 { 
  margin-top: 0; 
  color: var(--amarillo-acento); 
}

label { 
  display: block; 
  margin-top: 15px; 
  font-weight: bold; 
  user-select: none; 
}

input[type="text"], input[type="password"], select {
  width: 100%; 
  padding: 8px; 
  margin-top: 5px;
  border: none; 
  border-radius: 5px; 
  box-sizing: border-box; 
  font-size: 1em;
}

button {
  margin-top: 20px;
  background: var(--amarillo-acento);
  color: var(--azul-fondo);
  border: none;
  padding: 12px 20px;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
  font-size: 1em;
}

button:hover { 
  background: #F9E547; 
}

.error { 
  color: #FF8A80; 
  margin-top: 10px; 
}

.hidden { 
  display: none; 
}

/* Contenedor principal */
#app {
  width: 100%;
  max-width: 900px;
  background: var(--azul-fondo);
  border-radius: 10px;
  box-shadow: 0 0 30px rgba(0,0,0,0.35);
  padding: 20px;
  color: var(--blanco-texto);
  box-sizing: border-box;
  overflow-x: hidden;
}

header {
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  margin-bottom: 15px;
}

header button {
  background: var(--blanco-texto); 
  color: var(--azul-fondo);
  padding: 8px 15px; 
  border-radius: 6px; 
  border: none; 
  cursor: pointer;
}

.user-role {
  background: var(--amarillo-acento);
  color: var(--azul-fondo);
  padding: 5px 10px;
  border-radius: 5px;
  font-weight: bold;
  margin-right: 10px;
}

nav { 
  display: flex; 
  align-items: center; 
  gap: 15px; 
  flex-wrap: wrap; 
  margin-bottom: 20px; 
}

nav label { 
  color: var(--amarillo-acento); 
  font-weight: bold; 
}

#month-select, #date-select { 
  max-width: 150px; 
}

#turnos-tabs { 
  display: flex; 
  gap: 10px; 
  flex-wrap: wrap; 
}

.turno-btn {
  background: var(--azul-fondo);
  border: 2px solid var(--amarillo-acento);
  color: var(--amarillo-acento);
  padding: 8px 15px;
  border-radius: 8px;
  font-weight: bold;
  transition: background 0.3s, color 0.3s;
}

.turno-btn.active, .turno-btn:hover {
  background: var(--amarillo-acento);
  color: var(--azul-fondo);
}

/* --- RESPONSIVE TABLE --- */
.table-wrapper { 
  width: 100%; 
  overflow-x: auto; 
}

#alumnos-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: auto;
  min-width: 600px;
}

th, td {
  border: 1px solid var(--amarillo-acento);
  padding: 10px;
  text-align: center;
  color: var(--blanco-texto);
}

th { 
  background: var(--amarillo-acento); 
  color: var(--azul-fondo); 
}

.asistencia-cell { 
  font-size: 1.5em; 
  user-select: none; 
  cursor: pointer; 
}

.btn-modificar {
  background: #FFD54F; 
  color: var(--azul-fondo);
  border-radius: 5px; 
  border: none; 
  padding: 6px 12px;
  cursor: pointer; 
  font-weight: bold;
  margin-left: 5px; 
  transition: background 0.3s;
}

.btn-modificar:hover { 
  background: #FFEC7A; 
}

.btn-eliminar {
  background: #E53935; 
  color: white;
  border: none; 
  border-radius: 5px; 
  padding: 6px 12px;
  cursor: pointer; 
  font-weight: bold;
  margin-left: 5px; 
  transition: background 0.3s;
}

.btn-eliminar:hover { 
  background: #FF5252; 
}

.pago-toggle {
  padding: 6px 12px; 
  border: none; 
  border-radius: 5px;
  font-weight: bold; 
  cursor: pointer;
}

@media (max-width: 650px) {
  nav { 
    flex-direction: column; 
    align-items: flex-start; 
  }
  
  #add-alumno-form { 
    flex-direction: column; 
    align-items: stretch; 
  }
}