/* ตัวแปรสี */
:root {
    --primary-color: #f16322;
    --primary-dark: #d35400;
    --primary-light: #f8a97a;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --gray-color: #777;
    --white: #fff;
    --black: #000;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --normal-font: "Prompt", sans-serif;
}

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

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    font-size: 12px;
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

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

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

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-title p {
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

/* Header */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    /* height: 110px; */
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo span {
    color: var(--dark-color);
}

.nav-menu {
    display: flex;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-menu a.active {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
}

.header-actions .btn {
    margin-left: 15px;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7)), url(image/photo-1522202176988-66273c2fd55.png);
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    padding: 120px 0;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

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

/* Courses Section */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.course-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.course-image {
    height: 200px;
    overflow: hidden;
}

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

.course-card:hover .course-image img {
    transform: scale(1.1);
}

.course-content {
    padding: 20px;
}

.course-category {
    display: inline-block;
    background-color: var(--primary-light);
    color: var(--primary-dark);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.course-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.course-instructor {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--gray-color);
}

.course-instructor img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-right: 10px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.course-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Features Section */
.features {
    background-color: var(--light-color);
}

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

.feature-card {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}

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

/* Testimonials Section */
.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonials-container {
    display: flex;
    transition: transform 0.5s ease;
}

.testimonial-card {
    min-width: 100%;
    padding: 30px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    color: var(--gray-color);
}

.testimonial-author {
    font-weight: 600;
}

.testimonial-role {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.slider-nav {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 10px;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #ddd;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background-color: var(--primary-color);
}

/* CTA Section */
.cta {
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
    color: var(--white);
    text-align: center;
    padding: 100px 0;
}

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

.cta p {
    max-width: 600px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
}

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

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

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 70px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

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

.footer-col ul li a {
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

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

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Responsive */
@media (max-width: 1100px) {
    .header-actions {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .header-actions .btn {
        padding: 6px 12px;
        width: 90px;
    }
}

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .nav-menu li a {
        font-size: 14px;
    }
}

@media (max-width: 890px) {
    .nav-menu li a {
        font-size: 12px;
    }

    .logo {
        font-size: 1.5rem;
    }
}

@media (max-width: 810px) {
    .logo {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
        position: fixed;
    }

    .logo {
        margin-left: 32px;
    }

    .nav-menu {
        position: fixed;
        top: 110px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding-top: 50px;
        transition: var(--transition);
    }

    .nav-menu a {
        font-size: 16px !important;
    }

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

    .nav-menu li {
        margin: 15px 0;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
        margin-bottom: 10px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }
}

.menu-toggle i {
    display: none;
}

.menu-toggle i.active {
    display: block;
}