/* Base Styles & Variables */
:root {
    --primary: #32CD32;
    --primary-dark: #008000;
    --secondary: #4CAF50;
    --accent: #43A047;
    --background: #FFFFFF;
    --dark: #333333;
    --light: #FFFFFF;
    --gray: #F5F5F5;
    --gray-dark: #E0E0E0;
    --shadow: 0 4px 10px rgba(0, 128, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --container-width: 1140px;
}

/* Reset & Global Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Niramit', 'Kanit', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--background);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--primary-dark);
}

h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img, svg {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 4rem 0;
}

/* Header */
header {
    background-color: var(--background);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-svg {
    height: 40px;
    width: auto;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-weight: 500;
    color: var(--dark);
    position: relative;
}

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

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.main-nav a:hover::after {
    width: 100%;
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: var(--primary);
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding: 5rem 0;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.hero-content h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-dark);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: var(--light);
    box-shadow: 0 4px 10px rgba(0, 128, 0, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    color: var(--light);
}

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

.btn-secondary:hover {
    background-color: rgba(50, 205, 50, 0.1);
    transform: translateY(-2px);
}

.cta-center {
    text-align: center;
    margin-top: 2rem;
}

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

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.feature {
    padding: 2rem;
    border-radius: var(--border-radius);
    background-color: var(--gray);
    transition: var(--transition);
    text-align: center;
    box-shadow: var(--shadow);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 128, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
}

/* Services Section */
.services {
    background-color: #E8F5E9;
}

.services h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.service {
    background-color: var(--light);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.service:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 128, 0, 0.15);
}

.service h3 {
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

/* How To Section */
.how-to {
    background-color: var(--light);
}

.how-to h2 {
    text-align: center;
    margin-bottom: 3rem;
}

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

.step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    gap: 1.5rem;
}

.step-circle {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    border-radius: 50%;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 4px 8px rgba(0, 128, 0, 0.2);
}

.step-content h3 {
    margin-bottom: 0.5rem;
}

/* FAQ Section */
.faq {
    background-color: #E8F5E9;
}

.faq h2 {
    text-align: center;
    margin-bottom: 3rem;
}

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

.accordion-item {
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.accordion-header {
    width: 100%;
    background-color: var(--light);
    border: none;
    padding: 1.2rem;
    text-align: left;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-header:hover {
    background-color: #F9F9F9;
}

.accordion-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.accordion-header.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    background-color: var(--light);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.2rem;
}

.accordion-header.active + .accordion-content {
    padding: 0 1.2rem 1.2rem;
}

/* Footer */
footer {
    background-color: #2E7D32;
    color: var(--light);
    padding: 4rem 0 1rem;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo-svg {
    height: 50px;
    width: auto;
}

.footer-links {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.footer-col {
    min-width: 150px;
}

.footer-col h4 {
    color: var(--light);
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
}

.footer-col ul li {
    margin-bottom: 0.7rem;
}

.footer-col a {
    color: #A5D6A7;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .menu-btn {
        display: block;
    }
    
    .menu-btn.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-btn.open span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-btn.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--light);
        padding: 2rem;
        height: 0;
        overflow: hidden;
        transition: height 0.3s ease;
    }
    
    .main-nav.active {
        height: calc(100vh - 70px);
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        overflow-y: auto;
    }
    
    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .main-nav li {
        margin: 1rem 0;
    }
    
    .cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .features-grid, .services-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .step-content {
        text-align: center;
    }
}

@media (max-width: 480px) {
    section {
        padding: 3rem 0;
    }
    
    .hero-section {
        padding: 3rem 0;
        min-height: 70vh;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

/* Thai Fonts */
@font-face {
    font-family: 'Kanit';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/kanit/v7/nKKZ-Go6G5tXcraVGwCKd6xBDFs.woff2) format('woff2');
    unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC;
}

@font-face {
    font-family: 'Kanit';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/kanit/v7/nKKU-Go6G5tXcr4uPhWzVaFrNlJzIu4.woff2) format('woff2');
    unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC;
}

@font-face {
    font-family: 'Niramit';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/niramit/v5/I_uuMpWdvgLdNxVLVXx7hiiEsv7tuxw.woff2) format('woff2');
    unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC;
}

@font-face {
    font-family: 'Niramit';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/niramit/v5/I_urMpWdvgLdNxVLVQh_4tMPC7YoPaK2.woff2) format('woff2');
    unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC;
}