:root {
    --primary-color: #0056b3;
    /* Professional Blue */
    --secondary-color: #ff9900;
    /* Safety Orange */
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --dark-bg: #1a1a1a;
    --font-main: 'Sarabun', sans-serif;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: #004494;
    border-color: #004494;
}

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

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

.btn-block {
    display: block;
    width: 100%;
}

/* Navbar */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: 70px;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
}

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

.nav-link.btn-primary {
    color: var(--white);
    padding: 8px 20px;
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--text-color);
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(to right, #f0f4f8, #ffffff);
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark-bg);
}

.hero-text h1 span {
    color: var(--primary-color);
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: #666;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.trust-badge-mobile {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #28a745;
    font-weight: 600;
    margin-top: 10px;
}

/* Trust Signals */
.trust-signals {
    padding: 40px 0;
    background-color: var(--white);
    border-bottom: 1px solid #eee;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    text-align: center;
}

.trust-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.trust-item p {
    font-weight: 600;
    color: #555;
}

/* Services Section */
.services {
    padding: 80px 0;
    background-color: var(--light-bg);
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--dark-bg);
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.service-info {
    padding: 25px;
}

.service-info h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.icon-wrapper {
    height: 200px;
    background-color: #e3f2fd;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-wrapper i {
    font-size: 4rem;
    color: var(--primary-color);
}

.service-info ul {
    padding-left: 20px;
    list-style-type: disc;
}

/* Why Choose Us */
.why-choose-us {
    padding: 80px 0;
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    border: 1px solid #eee;
    border-radius: 10px;
    transition: var(--transition);
}

.feature-item:hover {
    border-color: var(--primary-color);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.feature-item h3 {
    margin-bottom: 15px;
}

/* Process Section */
.process {
    padding: 80px 0;
    background-color: var(--dark-bg);
    color: var(--white);
}

.process .section-header h2,
.process .section-header p {
    color: var(--white);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

/* Testimonials */
.testimonials {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.quote {
    font-style: italic;
    color: #555;
    margin-bottom: 20px;
    position: relative;
}

.quote::before {
    content: '"';
    font-size: 3rem;
    color: #eee;
    position: absolute;
    top: -20px;
    left: -10px;
    z-index: -1;
}

.client-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.client-details h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.client-details p {
    font-size: 0.9rem;
    color: #777;
}

/* FAQ */
.faq {
    padding: 80px 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 20px 0;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding-bottom: 20px;
    color: #666;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: #002b5c;
    /* Dark Blue */
    color: var(--white);
}

.contact-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-details {
    margin-top: 30px;
}

.contact-details li {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.contact-details i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.contact-form-wrapper {
    flex: 1;
    min-width: 300px;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    color: var(--text-color);
}

.contact-form h3 {
    margin-bottom: 25px;
    text-align: center;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: #111;
    color: #aaa;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

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

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 0;
    background-color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.portfolio-item {
    text-align: center;
    padding: 30px;
    border: 1px solid #eee;
    border-radius: 10px;
    transition: var(--transition);
    background: var(--light-bg);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.portfolio-icon {
    width: 70px;
    height: 70px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.portfolio-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.portfolio-item h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: var(--dark-bg);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: #002b5c;
    /* Dark Blue */
    color: var(--white);
}

.contact-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-details {
    margin-top: 30px;
}

.contact-details li {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.contact-details i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.contact-form-wrapper {
    flex: 1;
    min-width: 300px;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    color: var(--text-color);
}

.contact-form h3 {
    margin-bottom: 25px;
    text-align: center;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: #111;
    color: #aaa;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

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

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 0;
    background-color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.portfolio-item {
    text-align: center;
    padding: 30px;
    border: 1px solid #eee;
    border-radius: 10px;
    transition: var(--transition);
    background: var(--light-bg);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.portfolio-icon {
    width: 70px;
    height: 70px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.portfolio-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.portfolio-item h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: var(--dark-bg);
}

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        gap: 0;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 16px 0;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

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

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

    .portfolio-item p {
        color: #666;
        font-size: 0.95rem;
    }

    .contact-wrapper {
        flex-direction: column;
    }
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: #002b5c;
    /* Dark Blue */
    color: var(--white);
}

.contact-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-details {
    margin-top: 30px;
}

.contact-details li {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.contact-details i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.contact-form-wrapper {
    flex: 1;
    min-width: 300px;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    color: var(--text-color);
}

.contact-form h3 {
    margin-bottom: 25px;
    text-align: center;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: #111;
    color: #aaa;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

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

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 0;
    background-color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.portfolio-item {
    text-align: center;
    padding: 30px;
    border: 1px solid #eee;
    border-radius: 10px;
    transition: var(--transition);
    background: var(--light-bg);
}

/* Blog Section */
.blog-section {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.blog-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.blog-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.blog-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-date {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
    font-weight: 500;
}

.blog-date i {
    margin-right: 5px;
}

.blog-content h3 {
    margin-bottom: 15px;
    color: var(--dark-bg);
    font-size: 1.3rem;
    line-height: 1.4;
}

.blog-excerpt {
    color: #666;
    margin-bottom: 20px;
    flex: 1;
}

.read-more-btn {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
    align-self: flex-start;
}

.read-more-btn:hover {
    color: var(--secondary-color);
    gap: 10px;
}

.loading-spinner {
    text-align: center;
    padding: 40px;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.loading-spinner i {
    margin-right: 10px;
}

.error-message,
.no-posts {
    text-align: center;
    padding: 40px;
    color: #999;
}

.error-message i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #dc3545;
}

/* Responsive for Blog Grid */
@media (max-width: 992px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Blog Modal (Popup) Styles --- */
.modal {
    display: none;
    /* ซ่อนไว้ก่อน จะแสดงเมื่อ JS สั่ง */
    position: fixed;
    /* ล็อคตำแหน่งให้ลอยอยู่หน้าจอ */
    z-index: 2000;
    /* ให้ค่าสูงกว่า Navbar (1000) */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    /* ถ้าเนื้อหายาวเกินจอ ให้มี Scrollbar */
    background-color: rgba(0, 0, 0, 0.6);
    /* พื้นหลังสีดำโปร่งแสง */
    backdrop-filter: blur(5px);
    /* เบลอฉากหลังเล็กน้อย */
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    /* จัดกึ่งกลาง และเว้นขอบบน 5% */
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 800px;
    /* ความกว้างสูงสุดของเนื้อหา */
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: modalFadeIn 0.3s;
}

/* ปุ่มปิด (X) */
.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 15px;
    transition: 0.3s;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--primary-color);
    text-decoration: none;
    cursor: pointer;
}

/* รูปภาพใน Modal */
.modal-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 20px;
}

/* จัดระเบียบเนื้อหาใน Modal */
.modal-body {
    line-height: 1.8;
    color: #444;
}

.modal-body p {
    margin-bottom: 15px;
}

/* Animation ตอนเปิด */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

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

/* Responsive สำหรับมือถือ */
@media (max-width: 768px) {
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 20px;
    }

    .modal-image {
        height: 200px;
    }
}