:root {
      --primary-color: #bc6c25;
      --secondary-color: #dda15e;
      --light-color: #fefae0;
      --dark-color: #283618;
      --accent-color: #606c38;
    }
    
    body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
  padding: 2rem;
  background: var(--light-color);
  color: var(--dark-color);
  line-height: 1.6;
  margin: 0 auto; /* solo esto */
}

    
    h1 {
      color: var(--primary-color);
      margin-bottom: 1.5rem;
      font-size: 2.2rem;
    }
    
    .container {
      max-width: 800px;
      margin: 0 auto;
      background: white;
      padding: 2rem;
      border-radius: 15px;
      box-shadow: 0 5px 15px rgba(0,0,0,0.1);
      margin-top: 1rem;
    }
    
    label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 600;
      color: var(--accent-color);
    }
    
    input[type="date"] {
      padding: 12px;
      font-size: 1.1rem;
      margin: 1rem 0;
      border: 2px solid #ddd;
      border-radius: 8px;
      width: 100%;
      max-width: 300px;
      transition: border 0.3s;
    }
    
    input[type="date"]:focus {
      border-color: var(--secondary-color);
      outline: none;
    }
    
    button {
      padding: 12px 24px;
      font-size: 1rem;
      background-color: var(--secondary-color);
      color: white;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s;
      font-weight: 600;
      margin: 1rem 0;
    }
    
    button:hover, button:focus {
      background-color: var(--primary-color);
      transform: translateY(-2px);
      box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }
    
    #resultado {
      margin-top: 2rem;
      font-size: 1.1rem;
      background: rgba(221, 161, 94, 0.1);
      padding: 1.5rem;
      border-radius: 10px;
      text-align: left;
      display: none;
    }
    
    .highlight {
      color: var(--primary-color);
      font-weight: bold;
    }
    
    footer {
      margin-top: 3rem;
      font-size: 0.9rem;
      color: #666;
    }
    
    #motivacion {
      font-style: italic;
      margin: 1.5rem 0;
      padding: 1rem;
      background: rgba(96, 108, 56, 0.1);
      border-left: 4px solid var(--accent-color);
    }
    
    #cambiarFrase {
      background-color: var(--accent-color);
      padding: 8px 16px;
      font-size: 0.9rem;
      margin-left: 0.5rem;
    }
    
    #cambiarFrase:hover {
      background-color: #4a5529;
    }
    
    .loading {
      color: #666;
      font-style: italic;
    }
    
    @media (max-width: 600px) {
      body {
        padding: 1rem;
      }
      
      .container {
        padding: 1.5rem;
      }
      
      h1 {
        font-size: 1.8rem;
      }
    }
    
header {
  background-color: #fefae0;
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 
              0 2px 4px -1px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background-color: rgba(254, 250, 224, 0.85);
  border-bottom: 1px solid rgba(221, 161, 94, 0.2);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-weight: 600;
  color: var(--accent-color);
  transition: all 0.3s ease;
  font-size: 1.1rem;
  position: relative;
  padding: 0.5rem 0.25rem;
}

nav a:hover {
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* Efecto subrayado animado */
nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Estilo para el item activo */
nav a.active {
  color: var(--primary-color);
}

nav a.active::after {
  width: 100%;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 1rem;
  }
  
  nav ul {
    gap: 1rem;
  }
  
  nav a {
    font-size: 1rem;
  }
}


/* Estilos específicos para el formulario */
    form {
      max-width: 600px;
      margin: 2rem auto;
      padding: 2rem;
      background: #fff;
      border-radius: 12px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    }

    .form-group {
      margin-bottom: 1.5rem;
      position: relative;
    }

    label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 600;
      color: #bc6c25;
      font-size: 0.95rem;
    }

    input[type="text"],
    input[type="email"],
    textarea {
      width: 100%;
      padding: 12px 15px;
      border: 2px solid #e9ecef;
      border-radius: 8px;
      font-size: 1rem;
      transition: all 0.3s ease;
      background-color: #f8f9fa;
    }

    input[type="text"]:focus,
    input[type="email"]:focus,
    textarea:focus {
      border-color: #dda15e;
      outline: none;
      background-color: #fff;
      box-shadow: 0 0 0 3px rgba(221, 161, 94, 0.2);
    }

    textarea {
      min-height: 150px;
      resize: vertical;
    }

    button[type="submit"] {
      background-color: #dda15e;
      color: white;
      border: none;
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s ease;
      width: 100%;
      display: block;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    button[type="submit"]:hover {
      background-color: #bc6c25;
      transform: translateY(-2px);
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

    .form-footer {
      text-align: center;
      margin-top: 2rem;
      font-size: 0.9rem;
      color: #6c757d;
      font-style: italic;
    }

    /* Efecto de placeholder mejorado */
    ::placeholder {
      color: #adb5bd;
      opacity: 1;
    }

    /* Animación de los campos */
    .form-group {
      animation: fadeIn 0.5s ease forwards;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Estilo para validación */
    input:invalid, textarea:invalid {
      border-color: #ff6b6b;
    }

    input:valid, textarea:valid {
      border-color: #51cf66;
    }