/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Arial, sans-serif;
}

/* Fondo general */
body {
    background: linear-gradient(135deg, #1a1a1d, #2d2d34);
    min-height: 100vh; /* permite scroll si hace falta */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px; /* margen para celulares */
}

/* Caja principal */
.login-container {
    background: #fff;
    padding: 40px 35px;
    border-radius: 15px;
    width: 350px;
    max-width: 100%; /* evita que se desborde */
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    animation: fadeIn 0.8s ease-in-out;
}

/* Título */
.login-container h2 {
    margin-bottom: 25px;
    color: #333;
    font-size: 24px;
    font-weight: 600;
}

/* Labels */
.login-container label {
    display: block;
    text-align: left;
    margin-bottom: 6px;
    font-size: 14px;
    color: #444;
    font-weight: 500;
}

/* Inputs */
.login-container input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    margin-bottom: 18px;
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.login-container input:focus {
    border-color: #007bff;
    box-shadow: 0 0 6px rgba(0,123,255,0.4);
    outline: none;
}

/* Botón */
.login-container button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    font-weight: bold;
    font-size: 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s ease;
}

.login-container button:hover {
    background: linear-gradient(135deg, #0056b3, #003d82);
}

/* Mensaje de error */
.error {
    margin-top: 15px;
    color: #d9534f;
    font-size: 14px;
}

/* Animación de entrada */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Responsive === */
@media (max-width: 480px) {
    body {
        align-items: flex-start; /* el formulario arranca arriba */
    }

    .login-container {
        width: 100%;
        padding: 25px 20px;
        margin-top: 40px; /* separa un poco desde arriba */
    }

    .login-container h2 {
        font-size: 20px;
    }

    .login-container input,
    .login-container button {
        font-size: 14px;
        padding: 10px;
    }
}