:root {
    --primary: #000066;
    --secondary: #FFFFFF;
    --accent: #F2C94C;
    --background: #F5F7FB;
    --text: #20243A;
    --border: #E1E5EF;
    --gray-text: #666C89;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Prompt', sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar-container {
    background-color: var(--secondary);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

.btn-cta-nav {
    background-color: var(--primary);
    color: var(--secondary) !important;
    padding: 8px 16px;
    border-radius: 6px;
}

.btn-cta-nav:hover {
    background-color: #000044;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary);
}

/* Hero Section */
.hero-section {
    background-color: var(--primary);
    color: var(--secondary);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    width: 100%;
    height: 100%;
}

.hero-text {
    flex: 1;
}

.badge-pill {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--accent);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-text h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: #DDE1EE;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-accent {
    background-color: var(--accent);
    color: var(--text);
}

.btn-accent:hover {
    background-color: #e0b738;
}

.btn-outline {
    background-color: transparent;
    color: var(--secondary);
    border: 2px solid var(--secondary);
}

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

.btn-outline-sm {
    display: inline-block;
    padding: 8px 16px;
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    margin-top: 15px;
}

.btn-outline-sm:hover {
    background-color: var(--primary);
    color: var(--secondary);
}

.hero-image {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    align-items: center;
    justify-content: center;
}

.tech-card-float,
.tech-card-float-2 {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 15px;
    width: 280px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.tech-card-float i,
.tech-card-float-2 i {
    font-size: 2rem;
    color: var(--accent);
}

.tech-card-float h4,
.tech-card-float-2 h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.tech-card-float p,
.tech-card-float-2 p {
    font-size: 0.8rem;
    color: #DDE1EE;
    margin: 0;
}

/* Sections General */
.section {
    padding: 80px 0;
}

.bg-white {
    background-color: var(--secondary);
}

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

.section-title h2 {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.section-title p {
    color: var(--gray-text);
    font-size: 1rem;
}

/* About Section */
.about-grid {

    display: flex;
    justify-content: center;
    align-items: center;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-text .lead {

    font-size: 1.1rem;
    margin-bottom: 30px;
    font-weight: 500;
}

.timeline {
    border-left: 2px solid var(--border);
    padding-left: 20px;
    margin-left: 10px;
}

.timeline-item {
    margin-bottom: 20px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 5px;
    width: 12px;
    height: 12px;
    background-color: var(--primary);
    border-radius: 50%;
}

.timeline-item .year {
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-box {
    background-color: var(--background);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.feature-box i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.feature-box h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.feature-box p {
    color: var(--gray-text);
    font-size: 0.9rem;
}

/* Filter Controls */
.filter-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-text);
}

.search-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--secondary);
    font-family: 'Prompt', sans-serif;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 102, 0.1);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 18px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background-color: var(--secondary);
    color: var(--text);
    cursor: pointer;
    font-family: 'Prompt', sans-serif;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary);
    color: var(--secondary);
    border-color: var(--primary);
}

/* Programs Grid */
.programs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.program-card {
    background-color: var(--secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
}

.program-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 102, 0.08);
    border-color: #cbd5e1;
}

.program-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.degree-badge {
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-bachelor {
    background-color: #e0f2fe;
    color: #0369a1;
}

.badge-master {
    background-color: #f3e8ff;
    color: #7e22ce;
}

.badge-phd {
    background-color: #fef3c7;
    color: #b45309;
}

.program-card h3 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.program-card p {
    color: var(--gray-text);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.program-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 15px;
}

.btn-detail {
    background-color: var(--primary);
    color: var(--secondary);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Prompt', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.btn-detail:hover {
    background-color: #000044;
}

.no-result {
    text-align: center;
    padding: 50px 0;
    color: var(--gray-text);
}

.no-result i {
    font-size: 3rem;
    margin-bottom: 15px;
}

.hidden {
    display: none !important;
}

/* Compare Section */
.compare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.compare-card {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 25px;
    position: relative;
}

.compare-card h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 8px;
    padding-right: 50px;
}

.compare-card .tag {
    position: absolute;
    top: 25px;
    right: 25px;
    background-color: var(--primary);
    color: var(--secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.compare-card p {
    font-size: 0.9rem;
    color: var(--gray-text);
    margin-bottom: 20px;
}

.compare-card ul {
    list-style: none;
}

.compare-card ul li {
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.compare-card ul li i {
    color: #10b981;
    margin-top: 4px;
}

/* Admission Section */
.admission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.admission-card {
    background-color: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    position: relative;
}

.round-badge {
    display: inline-block;
    background-color: #e0f2fe;
    color: #0369a1;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.admission-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.admission-card p {
    font-size: 0.9rem;
    color: var(--gray-text);
    margin-bottom: 20px;
}

.note-box {
    background-color: #fffbeb;
    border-left: 3px solid #f59e0b;
    padding: 10px 12px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.note-box small {
    color: #92400e;
    font-size: 0.8rem;
    line-height: 1.4;
    display: block;
}

.tuition-box {
    background-color: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
}

.tuition-content h3 {
    color: var(--primary);
    font-size: 1.15rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tuition-content p {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.disclaimer {
    display: block;
    font-size: 0.8rem;
    color: var(--gray-text);
    margin-top: 15px;
    font-style: italic;
}

/* Career Section */
.career-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.career-card {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: var(--transition);
}

.career-card:hover {
    border-color: var(--primary);
    background-color: var(--secondary);
}

.career-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.career-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text);
}

.career-card p {
    font-size: 0.85rem;
    color: var(--gray-text);
}

/* Footer */
footer {
    background-color: var(--primary);
    color: var(--secondary);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.footer-info p {
    font-size: 0.9rem;
    color: #DDE1EE;
    margin-bottom: 8px;
}

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--accent);
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links ul li a {
    color: #DDE1EE;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--secondary);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: #DDE1EE;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--secondary);
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: modalOpen 0.3s ease;
}

@keyframes modalOpen {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-btn {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--gray-text);
    cursor: pointer;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--text);
}

.modal-body-content h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.modal-body-content .modal-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.modal-body-content p {
    font-size: 0.95rem;
    color: var(--gray-text);
    margin-bottom: 20px;
}

.modal-body-content h4 {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 8px;
}

.modal-body-content ul {
    list-style: disc;
    margin-left: 20px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--gray-text);
}

.modal-body-content ul li {
    margin-bottom: 5px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--secondary);
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
        border-top: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }

    .programs-grid {
        grid-template-columns: 1fr;
    }
}

/* Banner Slider */
.hero-image {
    min-width: 0;
}

.banner-slider {
    position: relative;
    width: 100%;
    max-width: 560px;
    aspect-ratio: 16 / 10;
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1aa6, #000066);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.banner-track {
    position: absolute;
    inset: 0;
}

.banner-slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1.04);
    transition: opacity 0.9s ease, transform 5s ease;
}

.banner-slide.active {
    opacity: 1;
    transform: scale(1);
}

.banner-slider::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 40, 0.55), transparent 55%);
    pointer-events: none;
}

.banner-slider .tech-card-float,
.banner-slider .tech-card-float-2 {
    position: absolute;
    z-index: 2;
    width: auto;
    max-width: 62%;
    padding: 12px 16px;
}

.banner-slider .tech-card-float {
    top: 16px;
    right: 16px;
}

.banner-slider .tech-card-float-2 {
    bottom: 34px;
    left: 16px;
}

.banner-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}

.banner-slider:hover .banner-nav {
    opacity: 1;
}

.banner-nav:hover {
    background: rgba(255, 255, 255, 0.5);
}

.banner-nav.prev {
    left: 10px;
}

.banner-nav.next {
    right: 10px;
}

.banner-dots {
    position: absolute;
    bottom: 12px;
    left: 0;
    right: 0;
    z-index: 3;
    display: flex;
    justify-content: center;
    gap: 8px;
}

.banner-dots button {
    width: 9px;
    height: 9px;
    padding: 0;
    border: none;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: width 0.3s, background 0.3s;
}

.banner-dots button.active {
    width: 24px;
    background: var(--accent);
}

@media (max-width: 992px) {
    .banner-slider {
        max-width: 100%;
    }

    .banner-nav {
        opacity: 1;
    }
}

@media (max-width: 480px) {
    .banner-slider .tech-card-float-2 {
        display: none;
    }
}

/* Banner เต็มพื้นที่ hero-section */
.hero-section {
    padding: 0;
}

.hero-section .container.hero-content {
    max-width: none;
    width: 100%;
    padding: 0;
    gap: 0;
}

.hero-image {
    width: 100%;
    gap: 0;
}

.banner-slider {
    max-width: none;
    width: 100%;
    aspect-ratio: 21 / 9;
    min-height: 280px;
    max-height: 75vh;
    border-radius: 0;
    box-shadow: none;
}

@media (max-width: 768px) {
    .banner-slider {
        aspect-ratio: 16 / 10;
        min-height: 220px;
    }
}


/* ขนาด banner = ขนาดรูปภาพจริง */
.banner-slider,
.banner-slider:has(.banner-slide) {
    aspect-ratio: auto;
    min-height: 0;
    max-height: none;
}

@media (max-width: 768px) {
    .banner-slider {
        aspect-ratio: auto;
        min-height: 0;
    }
}

.banner-track {
    position: relative;
    inset: auto;
    display: grid;
}

.banner-track:empty {
    min-height: 280px;
}

.banner-slide {
    position: relative;
    inset: auto;
    grid-area: 1 / 1;
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}