:root {
    /* Colors */
    --color-primary: #1A2E44;
    --color-secondary: #284A65;
    --color-background: #F0F4F8;
    --color-footer-bg: #0D1A26;
    --color-button: #4C89A3;
    --color-footer-text: #BBCCDD;
    --color-footer-link: #4C89A3;
    --color-header-bg: #FFFFFF;
    --color-header-text: #1A2E44;
    --color-section-bg-1: #E0E6F0;
    --color-section-bg-2: #F0F4F8;
    --color-section-bg-3: #EBF0F5;
    --color-section-bg-4: #D9E2ED;
    --color-text-light: #BBCCDD; /* For footer links hover */
    --color-text-dark: #1A2E44; /* For header nav hover */

    /* Typography */
    --font-family-headings: 'Kanit', sans-serif;
    --font-family-body: 'Sarabun', sans-serif;
    --font-weight-bold: 700;

    /* 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;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

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

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

body {
    font-family: var(--font-family-body);
    line-height: 1.7; /* Generous line-height for readability */
    color: var(--color-primary);
    background-color: var(--color-background);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-headings);
    color: var(--color-primary);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.2;
    font-weight: var(--font-weight-bold);
}

h1 {
    font-size: 3.5rem; /* Larger for impact */
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 2rem;
}

p {
    margin-bottom: 1em;
    font-size: 1.125rem; /* Slightly larger base font for body text */
}

a {
    color: var(--color-button);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease);
}

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

/* Header Styles */
.header {
    background-color: var(--color-header-bg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-logo {
    font-family: var(--font-family-headings);
    font-weight: var(--font-weight-bold);
    color: var(--color-header-text);
    font-size: 1.8rem;
    text-decoration: none;
}

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

.header-nav li a {
    font-family: var(--font-family-headings);
    color: var(--color-header-text);
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease);
}

.header-nav li a:hover {
    color: var(--color-text-dark); /* Using a darker shade for hover */
    transform: scale(1.05); /* Slight scale for hover */
    text-decoration: none;
}

/* Footer Styles */
.footer {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-top: 1px solid rgba(128, 128, 128, 0.3); /* Soft border for modern look */
    text-align: center;
    font-size: 0.9rem;
}

.footer p {
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: var(--color-footer-link);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease), text-decoration var(--transition-speed) var(--transition-ease);
}

.footer a:hover {
    color: var(--color-text-light); /* Lighter color on hover */
    text-decoration: underline;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family-headings);
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) var(--transition-ease);
    text-decoration: none;
}

/* Specific Button Styles */
.btn-primary {
    background-color: var(--color-button);
    color: var(--color-header-bg); /* White text for contrast */
    border-radius: var(--border-radius-full); /* Rounded-full */
    box-shadow: var(--shadow-lg);
    transform: translateY(0);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
    background-color: color-mix(in srgb, var(--color-button) 90%, black); /* Slightly darker on hover */
}

.btn-add-to-cart {
    background-color: var(--color-button);
    color: var(--color-header-bg);
    border-radius: var(--border-radius-md); /* Rounded-lg */
    box-shadow: var(--shadow-md);
}

.btn-add-to-cart:hover {
    box-shadow: var(--shadow-lg);
    background-color: color-mix(in srgb, var(--color-button) 90%, black);
}

/* Card Styles */
.card {
    background-color: var(--color-header-bg); /* White background */
    border-radius: var(--border-radius-lg); /* Rounded-xl */
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
    transition: transform var(--transition-speed) var(--transition-ease);
    transform: scale(1);
    overflow: hidden; /* Ensure content respects border-radius */
}

.card:hover {
    transform: scale(1.03);
}

/* Section Backgrounds */
.section-bg-1 {
    background-color: var(--color-section-bg-1);
    padding: var(--spacing-xl) 0;
}

.section-bg-2 {
    background-color: var(--color-section-bg-2);
    padding: var(--spacing-xl) 0;
}

.section-bg-3 {
    background-color: var(--color-section-bg-3);
    padding: var(--spacing-xl) 0;
}

.section-bg-4 {
    background-color: var(--color-section-bg-4);
    padding: var(--spacing-xl) 0;
}

/* Utility classes for layout (assuming Tailwind is present, these are minimal) */
.container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

/* Micro-interactions and subtle effects */
input[type="text"],
input[type="email"],
input[type="password"],
textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-section-bg-4);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-body);
    font-size: 1rem;
    color: var(--color-primary);
    background-color: var(--color-header-bg);
    transition: border-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-button);
    box-shadow: 0 0 0 3px rgba(76, 137, 163, 0.2); /* Soft focus ring */
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .header {
        flex-direction: column;
        padding: var(--spacing-md);
    }

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

    .header-nav li a {
        font-size: 1rem;
    }

    .footer {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}


/* 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;
    }
}