/* Base Styles */
:root {
    --primary-color: #0A2540;
    --secondary-color: #D4AF37;
    --bg-light: #FFFFFF;
    --text-dark: #333333;
    --text-light: #F4F4F4;
    --border-color: #E0E0E0;
    --footer-bg: var(--primary-color);
    --font-main: 'Inter', 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

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

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
    color: #555;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.bg-light {
    background-color: #FFFFFF;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: #C5A059;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.3);
}

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

.btn-secondary:hover {
    background-color: #C5A059;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.3);
}

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

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent;
    z-index: 1000;
    box-shadow: none;
    padding: 20px 0;
    transition: all 0.3s ease;
}

.header.scrolled {
    background-color: #fff;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--secondary-color);
}

.nav {
    display: flex;
    align-items: center;
}

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

.nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    padding-bottom: 5px;
    color: #fff;
    transition: color 0.3s ease;
}

.header.scrolled .nav-link {
    color: #0A2540;
}

.header .lang-switch span {
    color: #fff !important;
}
.header.scrolled .lang-switch .lang-th {
    color: var(--secondary-color) !important;
}
.header.scrolled .lang-switch .lang-en {
    color: #bbb !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #fff;
}
.header.scrolled .mobile-menu-btn {
    color: #0A2540;
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    margin-top: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.3) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    color: var(--bg-light);
    max-width: 600px;
}

.hero-content h1 {
    color: var(--bg-light);
    margin-bottom: 20px;
    text-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

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

.hero-slogan {
    font-weight: 600;
    color: var(--secondary-color);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
    display: block;
}

/* Services Overview Section */
.services-overview {
    text-align: center;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--secondary-color);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background-color: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: left;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.service-img {
    height: 200px;
    background-color: #eee;
    background-size: cover;
    background-position: center;
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 15px;
}

/* Stats Section */
.stats {
    background-color: var(--primary-color);
    color: var(--bg-light);
    padding: 60px 0;
}

.stats-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    text-align: center;
    gap: 30px;
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.stat-item p {
    color: var(--bg-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
.footer {
    background-color: var(--footer-bg);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--bg-light);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--secondary-color);
}

.footer-col p {
    color: #bbb;
}

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

.footer-links a {
    color: #bbb;
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    color: #bbb;
}

.footer-contact i {
    color: var(--secondary-color);
    margin-top: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #888;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        flex-direction: column;
        align-items: center;
        text-align: center;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        gap: 25px;
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-link {
        color: #111;
        font-weight: 700;
    }
    
    .header.scrolled .nav-link {
        color: #111;
    }

    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
}