:root {
    /* Colors */
    --color-primary: #2E7D32; /* Deep Green */
    --color-secondary: #8BC34A; /* Light Green */
    --color-background: #F3F4F6; /* Light Gray */
    --color-footer-bg: #1B5E20; /* Darker Green for Footer */
    --color-button: #4CAF50; /* Button Green */
    --color-text-dark: #333333;
    --color-text-light: #ffffff;
    --color-accent-1: #FFFFFF;
    --color-accent-2: #F1F8E9; /* Very Light Green */
    --color-accent-3: #E8F5E9; /* Lighter Green */
    --color-accent-4: #DCE775; /* Lime Green */

    /* Fonts */
    --font-primary: 'Noto Sans Thai', sans-serif;
    --font-secondary: 'Lora', serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;

    /* Box Shadow */
    --shadow-subtle: 0px 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0px 8px 20px rgba(0, 0, 0, 0.1);
    --shadow-button-hover: 0px 6px 12px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-speed: 0.3s;
    --transition-timing: ease-in-out;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--color-text-dark);
    background-color: var(--color-background);
    margin: 0;
    padding: 0;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    color: var(--color-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.05em;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.03em;
}

h3 {
    font-size: 1.8rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

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

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

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

/* Background Section Classes */
.section-bg-1 {
    background-color: var(--color-accent-1); /* White */
}

.section-bg-2 {
    background-color: var(--color-accent-2); /* Very Light Green */
}

.section-bg-3 {
    background-color: var(--color-accent-3); /* Lighter Green */
}

.section-bg-4 {
    background-color: var(--color-accent-4); /* Lime Green */
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) var(--transition-timing);
    text-align: center;
    text-decoration: none;
    box-shadow: var(--shadow-subtle);
}

.btn-primary {
    background-color: var(--color-button);
    color: var(--color-text-light);
    box-shadow: var(--shadow-subtle);
}

.btn-primary:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-button-hover);
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-button-hover);
}

/* Header */
.header {
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-subtle);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-secondary);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-light);
    text-decoration: none;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}

.nav-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu ul li a {
    color: var(--color-text-light);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-4);
    transition: width var(--transition-speed) var(--transition-timing);
}

.nav-menu ul li a:hover::after {
    width: 100%;
}

/* Footer */
.footer {
    background-color: var(--color-footer-bg);
    color: var(--color-accent-2);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="%23388E3C" stroke-width="2" opacity="0.1"/><circle cx="20" cy="80" r="15" fill="%23388E3C" opacity="0.05"/><circle cx="80" cy="20" r="25" fill="%23388E3C" opacity="0.07"/></svg>');
    background-size: 100px 100px;
    opacity: 0.6;
    z-index: 0;
}

.footer-content {
    position: relative;
    z-index: 1;
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0 var(--spacing-sm) var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-links ul li a {
    color: var(--color-accent-2);
    font-size: 1rem;
    transition: color var(--transition-speed) var(--transition-timing);
}

.footer-links ul li a:hover {
    color: var(--color-accent-4);
    text-decoration: underline;
}

.footer-social-icons {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-social-icons a {
    color: var(--color-accent-2);
    font-size: 1.5rem;
    transition: color var(--transition-speed) var(--transition-timing), transform var(--transition-speed) var(--transition-timing);
}

.footer-social-icons a:hover {
    color: var(--color-accent-4);
    transform: scale(1.1);
}

.footer-copy {
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Card Component (Example) */
.card {
    background-color: var(--color-accent-1);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: var(--spacing-lg);
    transition: transform var(--transition-speed) var(--transition-timing), box-shadow var(--transition-speed) var(--transition-timing);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0px 12px 25px rgba(0, 0, 0, 0.15);
}

/* Form Elements (Example) */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text-dark);
    transition: border-color var(--transition-speed) var(--transition-timing), box-shadow var(--transition-speed) var(--transition-timing);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.2); /* Soft focus ring */
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Media Queries */
@media (max-width: 768px) {
    h1 {
        font-size: 2.8rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
        margin-top: var(--spacing-md);
    }

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

    .footer-links ul {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .btn {
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
    }
}


/* Cookie Banner Additional Styles for Tailwind */
.cookie-banner-hover-effect:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (prefers-reduced-motion: reduce) {
    .cookie-banner-hover-effect:hover {
        transform: none;
    }
}