:root {
    /* Colors */
    --color-primary: #2B8C6C;
    --color-secondary: #8DE0BB;
    --color-background: #F8F8F8;
    --color-footer-bg: #1A4736;
    --color-button: #2B8C6C;
    --color-text-dark: #333333;
    --color-text-light: #F8F8F8;
    --color-accent: #2B8C6C; /* Using primary as accent for minimalist theme */

    --section-bg-1: #FFFFFF;
    --section-bg-2: #F0F9F7;
    --section-bg-3: #E6F3EE;
    --section-bg-4: #DDF0E8;

    /* Typography */
    --font-family-heading: 'Prompt', sans-serif; /* Thai-friendly, modern */
    --font-family-body: 'Sarabun', sans-serif; /* Thai-friendly, readable */
    --font-size-base: 1.125rem; /* 18px */
    --line-height-base: 1.7;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;

    /* Border Radius */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;

    /* Shadows */
    --shadow-soft: 0 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 20px rgba(0, 0, 0, 0.08);

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

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

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-dark);
    background-color: var(--color-background);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--color-primary);
    line-height: 1.2;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem; /* 56px */
    font-weight: 700;
}

h2 {
    font-size: 2.75rem; /* 44px */
}

h3 {
    font-size: 2.25rem; /* 36px */
}

h4 {
    font-size: 1.75rem; /* 28px */
}

h5 {
    font-size: 1.5rem; /* 24px */
}

h6 {
    font-size: 1.25rem; /* 20px */
}

p {
    margin-bottom: var(--spacing-md);
}

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

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

strong {
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-speed) var(--transition-timing-function);
    text-decoration: none;
    box-shadow: var(--shadow-soft);
}

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

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

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

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

/* Cards */
.card {
    background-color: var(--section-bg-1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-speed) var(--transition-timing-function),
                box-shadow var(--transition-speed) var(--transition-timing-function);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

/* Forms */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid #E0E0E0;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    color: var(--color-text-dark);
    background-color: var(--section-bg-1);
    transition: border-color var(--transition-speed) var(--transition-timing-function),
                box-shadow var(--transition-speed) var(--transition-timing-function);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(43, 140, 108, 0.2); /* Soft focus ring */
}

textarea {
    min-height: 120px;
    resize: vertical;
}

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

/* Section Backgrounds */
.section-bg-1 {
    background-color: var(--section-bg-1);
}

.section-bg-2 {
    background-color: var(--section-bg-2);
}

.section-bg-3 {
    background-color: var(--section-bg-3);
}

.section-bg-4 {
    background-color: var(--section-bg-4);
}

/* Utility Classes for Spacing (if not fully covered by Tailwind) */
.py-section {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.mt-section {
    margin-top: var(--spacing-xl);
}

.mb-section {
    margin-bottom: var(--spacing-xl);
}

/* Footer Specifics */
footer {
    background-color: var(--color-footer-bg);
    color: var(--color-text-light);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

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

footer a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* General Layout Considerations (assuming Tailwind classes for grid/flex) */
.container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    h1 {
        font-size: 3rem;
    }
    h2 {
        font-size: 2.25rem;
    }
    h3 {
        font-size: 1.875rem;
    }
    .py-section {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 1rem; /* 16px */
    }
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 2rem;
    }
    h3 {
        font-size: 1.5rem;
    }
    .btn {
        font-size: 1rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
    .py-section {
        padding-top: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }
    .container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.75rem;
    }
    h3 {
        font-size: 1.375rem;
    }
}

/* Thin scrollbar for a cleaner look */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-background);
}

::-webkit-scrollbar-thumb {
    background: var(--color-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}


/* 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;
    }
}