body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: #f0f7f0;
    color: #333;
}

nav {
    background-color: #2e7d32;
    padding: 1rem;
    display: flex;
    justify-content: center;
    gap: 10px;
}

nav button {
    background: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    color: #2e7d32;
    transition: 0.3s;
}

nav button:hover {
    background: #e8f5e9;
}

main {
    max-width: 800px;
    margin: 20px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.page {
    display: none;
}

.active {
    display: block;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 30px 0;
}

.control-group {
    display: flex;
    flex-direction: column;
}

input[type=range] {
    cursor: pointer;
}

#status-box {
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    background-color: #e8f5e9;
    border: 2px solid #2e7d32;
}

.alerta {
    background-color: #ffebee !important;
    border-color: #c62828 !important;
    color: #c62828;
}

.img-placeholder img {
    max-width: 100%;
    border-radius: 8px;
}