@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Thai:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@400;600;700&display=swap');

:root {
    /* Colors */
    --primary-color: #2ECC71;
    --secondary-color: #1F8B5A;
    --background-color: #F0F4F8;
    --footer-bg-color: #1A1A1A;
    --button-color: #2ECC71;
    --text-color-dark: #1A1A1A;
    --text-color-light: #F0F4F8;
    --accent-color: #3498DB; /* A complementary accent */
    --card-bg-color: rgba(255, 255, 255, 0.15); /* Glassmorphism base */
    --card-border-color: rgba(255, 255, 255, 0.2);

    /* Section Backgrounds */
    --section-bg-1: #FFFFFF;
    --section-bg-2: #F8FBFD;
    --section-bg-3: #E8F5E9;
    --section-bg-4: #F0F4F8;

    /* Typography */
    --font-family-base: 'IBM Plex Sans Thai', sans-serif;
    --font-family-heading: 'Kanit', sans-serif;
    --font-size-base: 1rem; /* 16px */
    --line-height-base: 1.7;
    --line-height-heading: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Borders & Shadows */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.12);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --glass-backdrop-filter: blur(10px);

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--text-color-dark);
    line-height: var(--line-height-heading);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
}

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

h4 {
    font-size: 1.4rem;
    font-weight: 500;
}

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

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

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

/* Utility Classes for Spacing */
.py-section {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

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

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

/* 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);
}

/* 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-family: var(--font-family-heading);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) var(--transition-ease);
    box-shadow: var(--shadow-soft);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color-light);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
    box-shadow: 0 8px 25px rgba(46, 204, 113, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--accent-color);
    color: var(--text-color-light);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-secondary:hover {
    background-color: #2980B9;
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: none;
}

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


/* Cards - Glassmorphism */
.card {
    background: var(--card-bg-color);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--card-border-color);
    box-shadow: var(--glass-shadow);
    backdrop-filter: var(--glass-backdrop-filter);
    -webkit-backdrop-filter: var(--glass-backdrop-filter);
    padding: var(--spacing-lg);
    transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow), 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

/* Accordion - Glassmorphism */
.accordion-item {
    background: var(--card-bg-color);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--card-border-color);
    box-shadow: var(--glass-shadow);
    backdrop-filter: var(--glass-backdrop-filter);
    -webkit-backdrop-filter: var(--glass-backdrop-filter);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.accordion-header {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--text-color-dark);
    transition: background-color var(--transition-speed) var(--transition-ease);
}

.accordion-header:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

.accordion-content {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out, padding 0.5s ease-out;
}

.accordion-item.active .accordion-content {
    max-height: 200px; /* Adjust as needed */
    padding-bottom: var(--spacing-md);
}

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

.form-control {
    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-family-base);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
    background-color: var(--section-bg-1);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.2);
}

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

/* Footer specific styles */
footer {
    background-color: var(--footer-bg-color);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0;
    font-size: 0.9rem;
    text-align: center;
}

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

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

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--transition-ease), transform 0.6s var(--transition-ease);
}

.fade-in-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Media Queries for Responsiveness */
@media (max-width: 1024px) {
    h1 {
        font-size: 2.8rem;
    }
    h2 {
        font-size: 2rem;
    }
    .py-section {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }
    h2 {
        font-size: 1.8rem;
    }
    h3 {
        font-size: 1.5rem;
    }
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 1rem;
    }
    .card {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    h3 {
        font-size: 1.3rem;
    }
    body {
        font-size: 0.95rem;
    }
    .py-section {
        padding-top: var(--spacing-md);
        padding-bottom: 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;
    }
}