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

/* Fondo general */
body {
    background-color: #0d0d0d; /* negro tecnológico */
    color: #e0e0e0;
}

/* Barra superior */
.top-bar {
    background: linear-gradient(90deg, #001f3f, #0074D9); /* azul oscuro → azul brillante */
    padding: 15px;
    text-align: center;
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 2px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.6);
}

/* Contenedor principal */
.main-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px;
}

/* Lado izquierdo */
.left-side img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 116, 217, 0.6);
}

/* Lado derecho */
.right-side {
    width: 40%;
    background-color: #1a1a1a;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 116, 217, 0.7);
}

/* Formulario */
.login-form {
    display: flex;
    flex-direction: column;
}

.login-form label {
    margin: 10px 0 5px;
    font-weight: bold;
    color: #0074D9;
}

.login-form input {
    padding: 10px;
    border: 1px solid #0074D9;
    border-radius: 5px;
    background-color: #0d0d0d;
    color: #fff;
}

.login-form input:focus {
    outline: none;
    border-color: #39CCCC;
    box-shadow: 0 0 5px #39CCCC;
}

.login-form button {
    margin-top: 20px;
    padding: 12px;
    background: #0074D9;
    border: none;
    border-radius: 5px;
    color: #fff;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-form button:hover {
    background: #39CCCC;
}

/* Mensajes de error */
.error-message {
    margin-top: 15px;
    padding: 10px;
    background-color: #ff4136;
    color: #fff;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
}