:root {
    --primary: #5E3023;
    --secondary: #8B5A2B;
    --accent: #ffba3a;
    --light: #F5F5DC;
    --dark: #2A2A2A;
  }

  * {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .contenedor {
    background: rgba(245, 245, 220, 0.2);
    border: 2px solid var(--light);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    width: 400px;
    padding: 40px;
    box-shadow: 0 0 20px rgba(0,0,0,0.2);
  }

  .formulario h2 {
    color: var(--light);
    text-align: center;
    margin-bottom: 30px;
  }

  .input-contenedor {
    position: relative;
    margin-bottom: 30px;
  }

  .input-contenedor input {
    width: 100%;
    padding: 14px 40px 14px 12px;
    border: none;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--light);
    font-size: 1rem;
    transition: 0.3s;
  }

  .input-contenedor input:focus {
    outline: 2px solid var(--accent);
    background-color: rgba(255, 255, 255, 0.2);
  }

  .input-contenedor label {
    position: absolute;
    top: 50%;
    left: 12px;
    transform: translateY(-50%);
    color: var(--light);
    pointer-events: none;
    transition: 0.3s ease;
  }

  .input-contenedor input:focus ~ label,
  .input-contenedor input:valid ~ label {
    top: -10px;
    left: 8px;
    font-size: 0.75rem;
    color: var(--accent);
    background: rgba(94, 48, 35, 0.9);
    padding: 0 4px;
    border-radius: 4px;
  }

  .input-contenedor i {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    color: var(--light);
    font-size: 1.2rem;
  }

  button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 40px;
    background-color: var(--accent);
    color: var(--dark);
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }

  button:hover {
    background-color: #e0a530;
  }

  .registrar,
  .volver {
    text-align: center;
    margin-top: 20px;
  }

  .registrar a,
  .volver a {
    color: var(--light);
    font-weight: bold;
    text-decoration: none;
    transition: 0.3s;
  }

  .registrar a:hover,
  .volver a:hover {
    text-decoration: underline;
    color: var(--accent);
  }