:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="%23ffffff" opacity="0.1"><polygon points="1000,100 1000,0 0,100"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.service-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 5px solid var(--secondary-color);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.section-title {
    position: relative;
    margin-bottom: 50px;
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--secondary-color);
}

.contact-section {
    background: var(--primary-color);
    color: white;
    padding: 80px 0;
}

.btn-custom {
    background: var(--secondary-color);
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-custom:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    color: white;
}

.navbar {
    background: rgba(44, 62, 80, 0.95) !important;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.service-list {
    columns: 2;
    column-gap: 30px;
}

.service-item {
    background: #f8f9fa;
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    break-inside: avoid;
    transition: all 0.3s ease;
}

.service-item:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateX(10px);
}

.stats-section {
    background: #f8f9fa;
    padding: 60px 0;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
}

/* Tombol WhatsApp Fixed */
.whatsapp-btn {
    position: fixed;
    right: 20px;
    top: 80%;
    transform: translateY(-50%);
    z-index: 1000;
    background-color: #25D366;
    color: white;
    border-radius: 50px;
    padding: 12px 20px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
}

.whatsapp-btn:hover {
    background-color: #128C7E;
    transform: translateY(-50%) scale(1.05);
    color: white;
}

.whatsapp-btn i {
    font-size: 1.5rem;
    margin-right: 8px;
}

@media (max-width: 768px) {
    .service-list {
        columns: 1;
    }
    
    .hero-section {
        padding: 60px 0;
    }
    
    .service-card {
        padding: 20px;
    }
    
    .whatsapp-btn {
        padding: 10px 15px;
        right: 10px;
    }
}