:root {
    --bs-primary: #4A90D9;
    --bs-primary-rgb: 74, 144, 217;
    --bs-primary-dark: #357ABD;
    --bs-light-blue: #E8F4FD;
    --bs-card-border: #e0e8f0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #2c3e50;
    background-color: #f8fafc;
}

.navbar {
    border-bottom: 1px solid #e8ecf1;
}

.navbar .nav-link {
    font-weight: 500;
    color: #2c3e50 !important;
    transition: color .2s;
    padding: .5rem 1rem !important;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--bs-primary) !important;
}

.hero-section {
    background: linear-gradient(135deg, #ffffff 0%, var(--bs-light-blue) 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(74,144,217,.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #1a2a3a;
}

.hero-section .lead {
    font-size: 1.15rem;
    color: #5a6a7a;
}

.section-title {
    font-weight: 700;
    color: #1a2a3a;
    margin-bottom: .5rem;
}

.section-subtitle {
    color: #7a8a9a;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.service-card {
    border: 1px solid var(--bs-card-border);
    border-radius: 12px;
    transition: transform .25s, box-shadow .25s;
    background: #fff;
    height: 100%;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(74, 144, 217, .12);
}

.service-card .card-icon {
    font-size: 2.5rem;
    color: var(--bs-primary);
}

.portfolio-card {
    border: 1px solid var(--bs-card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform .25s, box-shadow .25s;
    background: #fff;
    height: 100%;
}

.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,.08);
}

.portfolio-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform .4s;
}

.portfolio-card:hover img {
    transform: scale(1.05);
}

.client-card {
    border: 1px solid var(--bs-card-border);
    border-radius: 12px;
    transition: box-shadow .25s;
    background: #fff;
    height: 100%;
}

.client-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,.06);
}

.client-card .client-icon {
    font-size: 2rem;
    color: var(--bs-primary);
}

.bg-light-blue {
    background-color: var(--bs-light-blue);
}

.btn-primary {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.btn-primary:hover {
    background-color: var(--bs-primary-dark);
    border-color: var(--bs-primary-dark);
}

.btn-outline-primary {
    color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.btn-outline-primary:hover {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.contact-form .form-control,
.contact-form .form-select {
    border-radius: 8px;
    border-color: #dde3ea;
    padding: .7rem 1rem;
}

.contact-form .form-control:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 .2rem rgba(74, 144, 217, .15);
}

.social-icon {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bs-light-blue);
    color: var(--bs-primary);
    font-size: 1.3rem;
    text-decoration: none;
    transition: background .2s, color .2s;
}

.social-icon:hover {
    background: var(--bs-primary);
    color: #fff;
}

.card-hover {
    transition: transform .25s, box-shadow .25s;
    cursor: pointer;
}

.card-hover:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 35px rgba(74, 144, 217, .15) !important;
}

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }
    .hero-section {
        padding: 50px 0;
    }
}