/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root Variables */
:root {
    --primary-color: rgb(75, 4, 211);
    --secondary-color: #f8f9fa;
    --dark-color: #343a40;
    --light-color: #ffffff;
}

/* Body */
body {
    font-family: Arial, sans-serif;
    background-color: var(--secondary-color);
    color: var(--dark-color);
    line-height: 1.6;
}

/* Navbar */
.navbar {
    background-color: var(--primary-color);
}

/* ✅ แสดง Dropdown เมื่อ Hover */
.dropdown:hover .dropdown-menu {
    display: block;
}

.navbar-brand {
    font-weight: bold;
    color: var(--light-color);
}

.navbar-nav .nav-link {
    color: var(--light-color);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #ddd;
}

/* Dropdown Menu */
.dropdown-menu {
    background-color: var(--primary-color);
}

.dropdown-item {
    color: var(--light-color);
}

.dropdown-item:hover {
    background-color: #5e29c2;
}

/* Header */
header {
    background-color: var(--secondary-color);
    padding: 3rem 1rem;
    text-align: center;
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
}

header p {
    font-size: 1.2rem;
    color: #555;
}

/* Cards (Panels) */
.card {
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.card-title {
    color: var(--primary-color);
}

.card-text {
    color: #555;
}

.card img {
    height: 300px;
    object-fit: cover;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .card img {
        height: 150px;
    }
}

/* Scroll to Top Button */
.scroll-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    display: none;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    transition: background-color 0.3s ease;
}

.scroll-top-btn:hover {
    background-color: #5e29c2;
}


/* Carousel Styles */
.carousel-inner img {
    height: 500px;
    object-fit: cover;
}

.carousel-caption {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 1rem;
    border-radius: 8px;
}

.carousel-caption h5 {
    color: #fff;
    font-size: 2rem;
    font-weight: bold;
}

.carousel-caption p {
    color: #ddd;
    font-size: 1.2rem;
}

/* Animation for Cards */
@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeInUp 0.8s ease-in-out;
}

.card:hover {
    transform: scale(1.05);
    transition: transform 0.3s;
}