/* Fondo general */
body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Segoe UI', sans-serif;
}

/* Imagen de fondo */
.background {
    background-image: url('../img/Fondo_Login.png'); /* ← Cambia por tu imagen */
    background-size: cover;
    background-position: center;
    filter: brightness(0.8);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Contenedor del login */
.login-container {
    background-color: rgba(255, 255, 255, 0.9);
    width: 350px;
    margin: 100px auto;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.3);
    text-align: center;
}

/* Imagen superior (logo) */
.logo-container {
    margin-bottom: 20px;
    border-radius: 50%;
}
.logo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: contain;
}

/* Título */
.login-container h2 {
    color: #003366;
    margin-bottom: 25px;
}

/* Campos de texto */
.input-group {
    display: flex;
    align-items: center;
    background: #f1f1f1;
    border-radius: 8px;
    margin-bottom: 15px;
    padding: 10px;
}
.input-group i {
    margin-right: 10px;
    color: #003366;
}
.input-group input {
    border: none;
    outline: none;
    background: transparent;
    width: 100%;
    font-size: 16px;
}

/* Botón */
.btn-login {
    background-color: #003366;
    color: white;
    border: none;
    border-radius: 8px;
    width: 100%;
    padding: 12px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}
.btn-login:hover {
    background-color: #0055a5;
}

/* Responsivo */
@media (max-width: 400px) {
    .login-container {
        width: 85%;
        margin: 50px auto;
        padding: 25px;
    }
    .logo {
        width: 80px;
        height: 80px;
    }
}

/* Botón modo oscuro */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #003366;
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    box-shadow: 0 4px 10px rgba(0,0,0,.3);
    z-index: 10;
    transition: background 0.3s;
}

.theme-toggle:hover {
    background: #0055a5;
}

/* =======================
   MODO OSCURO
======================= */
body.dark-mode {
    background-color: #121212;
}

/* Fondo oscuro */
body.dark-mode .background {
    background-image: url('../img/Fondo_Login_B.png');
    filter: brightness(1.5);
}

/* Contenedor */
body.dark-mode .login-container {
    background-color: rgba(53, 53, 53, 0.95);
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.8);
}

/* Título */
body.dark-mode h2 {
    color: #ffffff;
}

/* Inputs */
body.dark-mode .input-group {
    background: #1f1f1f;
}

body.dark-mode .input-group i {
    color: #4da3ff;
}

body.dark-mode .input-group input {
    color: #ffffff;
}

/* Botón login */
body.dark-mode .btn-login {
    background-color: #4da3ff;
}

body.dark-mode .btn-login:hover {
    background-color: #1e7fe6;
}

/* Alerta error */
body.dark-mode .alerta.error {
    background: #5c1a1a;
    color: #fff;
}