:root {
  /** primary (azul principal) **/
  --ion-color-primary: #0f4fa3;
  --ion-color-primary-rgb: 15, 79, 163;
  --ion-color-primary-contrast: #ffffff;
  --ion-color-primary-contrast-rgb: 255, 255, 255;
  --ion-color-primary-shade: #0d468f;
  --ion-color-primary-tint: #275fae;

  /** secondary (amarillo vibrante) **/
  --ion-color-secondary: #ffd400;
  --ion-color-secondary-rgb: 255, 212, 0;
  --ion-color-secondary-contrast: #000000;
  --ion-color-secondary-contrast-rgb: 0, 0, 0;
  --ion-color-secondary-shade: #e0bb00;
  --ion-color-secondary-tint: #ffda1a;
}

/* LOGIN */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.login-box {
  background: var(--ion-color-step-50, #ffffff);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  width: 90%;
  max-width: 400px;
  transition: background 0.3s;
}

.ion-palette-dark .login-box {
  background: var(--ion-color-step-100, #1e1e1e);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.login-box h2 { margin-top: 10px; color: var(--ion-color-primary); }
.login-box p { color: var(--ion-text-color, #666); margin-bottom: 25px; }
.logo { max-width: 120px; border-radius: 50%; margin-bottom: 15px; }

/* GRILLA Y LEYENDA */
.leyenda {
  display: flex;
  justify-content: center;
  gap: 15px;
  padding: 10px;
  background: var(--ion-background-color, #fff);
  border-bottom: 1px solid var(--ion-color-step-150, #ddd);
}
.leyenda .item-leyenda {
  display: flex;
  align-items: center;
  font-size: 14px;
  font-weight: bold;
  color: var(--ion-text-color, #555);
}
.leyenda .item-leyenda .box {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  margin-right: 6px;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 8px;
  padding: 15px;
}

.grid-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  border-radius: 8px;
  font-weight: bold;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transition: transform 0.1s;
}

.grid-item:active {
  transform: scale(0.95);
}

/* Colores de estado */
.btn-libre {
  background-color: var(--ion-color-step-100, #f4f5f8);
  color: var(--ion-color-step-800, #444);
  border: 1px solid var(--ion-color-step-200, #d7d8da);
}
.ion-palette-dark .btn-libre {
  background-color: #2a2a2a;
  color: #ccc;
  border: 1px solid #444;
}

.btn-incompleto {
  background-color: var(--ion-color-secondary, #ffd400);
  color: var(--ion-color-secondary-contrast, #000);
  border: 1px solid var(--ion-color-secondary-shade, #e0bb00);
}

.btn-completo {
  background-color: var(--ion-color-primary, #0f4fa3);
  color: var(--ion-color-primary-contrast, #fff);
  border: 1px solid var(--ion-color-primary-shade, #0d468f);
}