:root {
    /* Brand Colors */
    --primary-color: #0066cc; /* Professional Blue */
    --secondary-color: #28a745; /* Clean Green */
    --accent-color: #ffc107; /* Highlight/CTA */
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --light-bg: #f8f9fa;
    --dark-bg: #1a1a1a;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Prompt', 'Sarabun', sans-serif; /* Thai friendly fonts */
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Prompt', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.btn-primary:hover {
    background-color: #0052a3;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: #218838;
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-dark);
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f7ff 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image img {
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Features/Benefits */
.features {
    padding: var(--spacing-lg) 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 15px;
    background: var(--white);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

/* Services */
.services {
    padding: var(--spacing-lg) 0;
    background: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition-fast);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.service-img {
    height: 200px;
    background-color: #ddd; /* Placeholder color */
    background-size: cover;
    background-position: center;
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #004c99 100%);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-section .btn {
    background: var(--white);
    color: var(--primary-color);
}

.cta-section .btn:hover {
    background: #f0f0f0;
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: #ccc;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links li {
    margin-bottom: 10px;
}

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

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    font-size: 0.9rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    padding: 20px;
    z-index: 2000;
    display: none; /* Hidden by default, shown by JS */
    border-top: 4px solid var(--primary-color);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        padding-top: 50px;
        transition: 0.3s;
    }

    .nav-links.active {
        left: 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
}