/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --primary-color: #1a365d;
    --primary-light: #2c5282;
    --primary-dark: #0f2744;
    --accent-color: #c9a227;
    --accent-hover: #b8911f;
    --text-color: #2d3748;
    --text-light: #718096;
    --bg-color: #ffffff;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    --border-color: #e2e8f0;
    --success-color: #38a169;
    --error-color: #e53e3e;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    line-height: 1.3;
}

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

ul {
    list-style: none;
}

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

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Montserrat', sans-serif;
}

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

.nav-link {
    font-weight: 600;
    color: var(--text-color);
    padding: 8px 0;
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.hero-title .highlight {
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: 'Montserrat', sans-serif;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ============================================
   Sections Common
   ============================================ */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    font-size: 18px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--text-color);
}

.about-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 40px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    color: var(--success-color);
    font-weight: 700;
    font-size: 20px;
}

.feature-text {
    font-weight: 600;
    color: var(--primary-color);
}

/* ============================================
   Services Section
   ============================================ */
.services {
    background: var(--bg-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-light);
    padding: 35px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.service-card.featured {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
}

.service-card.featured .service-title,
.service-card.featured .service-description {
    color: white;
}

.service-card.featured .service-title-link {
    color: white;
}

.service-card.featured .service-title-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.service-card:not(.featured) .service-title-link:hover {
    color: var(--accent-color);
}

.service-card.featured .service-badge {
    background: var(--accent-color);
    color: white;
}

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.service-title {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.service-title-link {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.service-description {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.7;
}

.service-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
}

.service-link:hover {
    color: var(--accent-color);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--bg-light);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-color);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

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

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    margin-top: 4px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-label {
    font-size: 14px;
    color: var(--text-light);
    cursor: pointer;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 40px 0;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    font-size: 28px;
}

.footer-logo .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.footer-text {
    opacity: 0.8;
    margin-bottom: 10px;
}

.footer-disclaimer {
    font-size: 14px;
    opacity: 0.6;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 992px) {
    .hero-title {
        font-size: 40px;
    }
    
    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        padding: 40px 20px;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-link {
        font-size: 20px;
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-text {
        font-size: 16px;
    }
    
    .about-features {
        flex-direction: column;
        align-items: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .service-card {
        padding: 25px;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .header,
    .hero-buttons,
    .contact-form,
    .footer {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}