:root {
    --primary-color: #004AAD;      /* สีน้ำเงินเข้ม - ดูน่าเชื่อถือ */
    --secondary-color: #0066CC;    /* สีน้ำเงินกลาง */
    --accent-color: #00264D;       /* สีน้ำเงินเข้มมาก - สำหรับเน้นความสำคัญ */
    --text-light: #FFFFFF;         /* สีขาว - สำหรับข้อความบนพื้นหลังเข้ม */
    --text-dark: #1A1A1A;          /* สีดำ - สำหรับข้อความทั่วไป */
    --bg-light: #F5F7FA;           /* สีพื้นหลังอ่อน */
    --bg-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

body {
    font-family: 'Kanit', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
}

.navbar {
    background: var(--accent-color);
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    display: flex;
    align-items: center;
    color: var(--text-light) !important;
    font-weight: 600;
    font-size: 1.4rem;
}

.navbar-brand img {
    height: 45px;
    margin-right: 12px;
}

.nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--text-light);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.hero-section {
    background: var(--bg-gradient);
    padding: 5rem 0;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-pattern.png') repeat;
    opacity: 0.1;
}

.hero-section h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.hero-section p {
    font-size: 1.3rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    background: white;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.card-title {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.25rem;
}

.btn-primary {
    background: var(--primary-color);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.btn-light {
    background: rgba(255,255,255,0.9);
    color: var(--primary-color);
    border: none;
    font-weight: 500;
}

.btn-light:hover {
    background: white;
    color: var(--secondary-color);
}

.footer {
    background: var(--accent-color);
    color: var(--text-light);
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer h5 {
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer p {
    opacity: 0.9;
    line-height: 1.8;
}

.footer a {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer a:hover {
    color: var(--secondary-color);
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* Product card specific styles */
.product-card {
    height: 100%;
}

.product-card .card-img-top {
    height: 200px;
    object-fit: cover;
}

.product-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 1s ease-out;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-section p {
        font-size: 1.1rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .navbar-brand img {
        height: 35px;
    }
}