* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}

body {
    margin: 0;
    height: 100vh;
    background: url("../imagen/Invernadero.jpg") no-repeat center center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Capa oscura encima de la imagen */
.overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 70, 30, 0.45);
    z-index: 1;
}

.login-container {
    position: relative;
    z-index: 2;
    width: 320px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.90);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.login-container h2 {
    color: #1b5e20;
    margin-bottom: 5px;
}

.login-container p {
    color: #4caf50;
    margin-bottom: 20px;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #81c784;
    border-radius: 6px;
    outline: none;
}

.login-container input:focus {
    border-color: #2e7d32;
}

.login-container button {
    width: 100%;
    padding: 10px;
    margin-top: 15px;
    background: linear-gradient(135deg, #2e7d32, #66bb6a);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
}

.login-container button:hover {
    background: linear-gradient(135deg, #1b5e20, #4caf50);
}

#mensaje {
    display: block;
    margin-top: 12px;
    font-weight: bold;
}