* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #39B54A 0%, #ffffff 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

/* Efecto de fondo animado */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: backgroundMove 20s linear infinite;
    z-index: 0;
}

@keyframes backgroundMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* Formulario de login */
form {
    background: rgba(255, 255, 255, 0.98);
    padding: 50px 45px;
    width: 100%;
    max-width: 420px;
    text-align: center;
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.3),
                0 10px 30px rgba(0, 0, 0, 0.2);
    border-radius: 25px;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.6s ease-out;
}

form h2 {
    margin-bottom: 35px;
    background: linear-gradient(135deg, #39B54A, #00A14B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2em;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    padding-bottom: 15px;
}

form h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #39B54A, transparent);
    border-radius: 2px;
}

/* Inputs con diseño moderno */
form input {
    background: #f8f9fa;
    width: 100%;
    border: 2px solid #e9ecef;
    margin: 0 0 20px;
    padding: 18px 20px;
    font-size: 15px;
    border-radius: 12px;
    outline: none;
    box-sizing: border-box;
    transition: all 0.3s ease;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

form input:focus {
    background: #ffffff;
    border-color: #39B54A;
    box-shadow: 0 0 0 3px rgba(57, 181, 74, 0.1),
                0 5px 15px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

form input::placeholder {
    color: #adb5bd;
    font-weight: 400;
}

/* Botón principal con efecto elegante */
form button {
    background: linear-gradient(135deg, #39B54A 0%, #00A14B 100%);
    width: 100%;
    border: none;
    padding: 18px 20px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 8px 20px rgba(57, 181, 74, 0.3);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    overflow: hidden;
    margin-top: 10px;
}

/* Efecto de brillo en el botón */
form button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

form button:hover::before {
    left: 100%;
}

form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(57, 181, 74, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.2);
}

form button:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(57, 181, 74, 0.3);
}

/* Botón de cambio entre administrador/aprendiz */
.btn-aprendiz {
    position: absolute;
    top: 25px;
    left: 25px;
    background: rgba(255, 255, 255, 0.95);
    color: #39B54A;
    padding: 12px 25px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 12px;
    border: 2px solid #39B54A;
    text-decoration: none;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    z-index: 10;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-aprendiz:hover {
    background: linear-gradient(135deg, #39B54A, #00A14B);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(57, 181, 74, 0.3);
}

.btn-aprendiz:active {
    transform: translateY(-1px);
}

/* Mensaje de error elegante */
.error-message {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 2px solid #f5c6cb;
    text-align: center;
    font-weight: 500;
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.2);
    animation: shake 0.5s ease-in-out;
}

/* Animación de error */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Animación de entrada */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    form {
        padding: 40px 30px;
        max-width: 380px;
    }

    form h2 {
        font-size: 1.6em;
        margin-bottom: 25px;
    }

    form input {
        padding: 16px 18px;
        font-size: 14px;
    }

    form button {
        padding: 16px 18px;
        font-size: 14px;
    }

    .btn-aprendiz {
        top: 15px;
        left: 15px;
        padding: 10px 20px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    form {
        padding: 35px 25px;
        max-width: 340px;
    }

    form h2 {
        font-size: 1.4em;
        letter-spacing: 1px;
    }

    form input {
        padding: 14px 16px;
        font-size: 13px;
        margin-bottom: 15px;
    }

    form button {
        padding: 14px 16px;
        font-size: 13px;
        letter-spacing: 1px;
    }

    .btn-aprendiz {
        top: 12px;
        left: 12px;
        padding: 8px 16px;
        font-size: 12px;
    }

    .error-message {
        padding: 12px 16px;
        font-size: 13px;
    }
}


form input {
    animation: fadeInUp 0.8s ease-out backwards;
}

form input:nth-child(2) { animation-delay: 0.1s; }
form input:nth-child(3) { animation-delay: 0.2s; }
form input:nth-child(4) { animation-delay: 0.3s; }
form button { animation: fadeInUp 0.8s ease-out 0.4s backwards; }

        .error-message {
            background-color: #f8d7da;
            color: #721c24;
            padding: 12px;
            border-radius: 5px;
            margin-bottom: 15px;
            border: 1px solid #f5c6cb;
            text-align: center;
        }

        .btn-warning {
    display: block;
    width: 100%;
    text-align: center;
    padding: 18px 20px;
    background: linear-gradient(135deg, #FFC107 0%, #FF9800 100%);
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    border-radius: 12px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    cursor: pointer;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(255, 152, 0, 0.35);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

    /* toco meter esta animacion para que salliera el boton de reglas igual que el resto del form */
    animation: fadeInUp 0.8s ease-out 0.5s backwards;
}

.btn-warning::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
    transition: left 0.6s;
}

.btn-warning:hover::before {
    left: 100%;
}

.btn-warning:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(255, 152, 0, 0.45),
                0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-warning:active {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255, 152, 0, 0.35);
}