:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #7f8c8d;
    --dark-text-color: #2c3e50;
}

body {
    font-family: 'Sarabun', sans-serif;
    color: var(--text-color);
    line-height: 1.8;
    padding-top: 70px; /* For fixed navbar */
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--dark-text-color);
}

.section {
    padding: 5rem 0;
}

.section-heading {
    margin-bottom: 3rem;
}

.navbar {
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 700;
}

.nav-link {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.6), rgba(44, 62, 80, 0.6)), url('https://images.unsplash.com/photo-1517694712202-14dd9538aa97?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 10rem 2rem;
    text-align: center;
}

.hero h1 {
    color: white;
    font-size: 3.5rem;
    font-weight: 700;
}

.hero .lead {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    border-radius: 50px;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

#about .text-muted {
    font-size: 1.1rem;
}

#why-us {
    background-color: var(--light-color);
}

#services .card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.07);
    transition: all 0.3s ease;
}

#services .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.feature-icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    margin: 0 auto 20px;
}

#other-work .list-group-item {
    background: none;
    border: none;
    font-size: 1.1rem;
    padding-left: 0;
}

#contact a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

#contact a:hover {
    text-decoration: underline;
}

footer {
    background-color: var(--secondary-color);
}