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

body {
    background-image: url('backgroundindex.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
    color: #333;
}

/* Background animasi dinonaktifkan */
.background {
    display: none;
}

.lab-elements {
    display: none;
}

.simulasi-header {
    background: rgba(255, 255, 255, 0.6); /* dari 0.8 jadi 0.6 (lebih transparan) */
    padding: 15px 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.simulasi-header .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.back-btn {
    background: #74b9ff;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 1em;
}

.back-btn:hover {
    background: #0984e3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(116, 185, 255, 0.4);
}

.title h1 {
    color: #2d3436;
    font-size: 2em;
    text-align: center;
    margin-bottom: 5px;
}

.title p {
    color: #636e72;
    text-align: center;
    font-size: 1.1em;
}

.lab-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

.lab-bench {
    background: rgba(255, 255, 255, 0.6); /* dari 0.8 jadi 0.6 (lebih transparan) */
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.welcome-section {
    text-align: center;
    margin-bottom: 40px;
    color: #2d3436;
}

.welcome-section h2 {
    font-size: 2.2em;
    margin-bottom: 10px;
}

.welcome-section p {
    font-size: 1.2em;
    color: #636e72;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.equipment-card {
    background: linear-gradient(135deg, rgba(129, 236, 236, 0.7), rgba(116, 185, 255, 0.7));
    padding: 30px 25px;
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid transparent;
    text-decoration: none;
    color: inherit;
    display: block;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(12px);
}

.equipment-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    border-color: #0984e3;
}

.equipment-icon {
    font-size: 4em;
    margin-bottom: 15px;
}

.equipment-name {
    font-size: 1.4em;
    font-weight: bold;
    color: #2d3436;
    margin-bottom: 10px;
}

.equipment-desc {
    color: #636e72;
    font-size: 1em;
    margin-bottom: 15px;
    line-height: 1.5;
}

.equipment-hint {
    margin-top: 15px;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 600;
    color: #2d3436;
}

.instruction-section {
    margin-top: 40px;
}

.instruction-card {
    background: rgba(255, 255, 255, 0.6); /* dari 0.75 jadi 0.6 (lebih transparan) */
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #74b9ff;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.instruction-card h3 {
    color: #2d3436;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.4em;
}

.instruction-card ol {
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.instruction-card li {
    margin-bottom: 15px;
    line-height: 1.6;
    color: #2d3436;
    font-size: 1.1em;
}

.instruction-card strong {
    color: #0984e3;
}

@media (max-width: 768px) {
    .simulasi-header .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
    }
    
    .equipment-card {
        padding: 25px 20px;
    }
    
    .equipment-icon {
        font-size: 3em;
    }
}

@media (max-width: 480px) {
    .lab-container {
        padding: 0 15px;
    }
    
    .lab-bench {
        padding: 20px;
    }
    
    .welcome-section h2 {
        font-size: 1.8em;
    }
    
    .title h1 {
        font-size: 1.6em;
    }
}