/* Variables */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --accent-color: #f59e0b;
    --accent-dark: #d97706;
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --bg-color: #ffffff;
    --bg-color-dark: #111827;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    
    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-base: 16px;
    --line-height: 1.5;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Container */
    --container-width: 1280px;
    --container-padding: 1.5rem;
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

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

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

a:hover {
    color: var(--primary-dark);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.site-header.hidden {
    transform: translateY(-100%);
    box-shadow: none;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-lg);
    border-bottom: none;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--container-padding);
    max-width: var(--container-width);
    margin: 0 auto;
    height: 70px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.site-logo:hover {
    transform: translateY(-2px);
}

.site-logo img {
    height: 40px;
    width: auto;
    transition: transform var(--transition-fast);
}

.site-logo:hover img {
    transform: scale(1.05);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

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

.nav-link {
    position: relative;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
    z-index: -1;
}

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

.nav-link:hover::before {
    opacity: 0.1;
    transform: scale(1);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.nav-link.active::before {
    opacity: 0.1;
    transform: scale(1);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    border: 2px solid var(--primary-color);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px -2px rgba(37, 99, 235, 0.3);
}

.cta-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px -1px rgba(37, 99, 235, 0.2);
}

.cta-button i {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.cta-button:hover i {
    transform: translateX(2px);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
    z-index: 1001;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    margin: 5px auto;
    transition: all var(--transition-fast);
    transform-origin: center;
    border-radius: var(--radius-full);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    background: var(--primary-color);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    background: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(rgba(26, 82, 118, 0.9), rgba(26, 82, 118, 0.9)),
                url('/assets/images/hero-bg.jpg') center/cover;
    color: white;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.hero-lead {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Sections */
.section {
    padding: var(--spacing-xl) 0;
}

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

.section-title h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

/* Grids */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Services */
.service-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

/* Stats */
.stats {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Values */
.value-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.value-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

/* News */
.news-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card .card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.news-excerpt {
    flex: 1;
    margin-bottom: var(--spacing-md);
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
.site-footer {
    background: var(--primary-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-info {
    max-width: 300px;
}

.footer-logo {
    height: 40px;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h3 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.footer-column ul li a:hover {
    color: white;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.contact-list i {
    margin-top: 4px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    color: rgba(255, 255, 255, 0.8);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.social-link:hover {
    color: white;
    transform: translateY(-2px);
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive Design */
@media (max-width: 1200px) {
    :root {
        --container-width: 960px;
    }
    
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 992px) {
    :root {
        --container-width: 720px;
    }
    
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-info {
        max-width: none;
        text-align: center;
    }
    
    .footer-logo {
        margin: 0 auto var(--spacing-md);
    }
}

@media (max-width: 768px) {
    :root {
        --container-width: 540px;
    }
    
    html { font-size: 14px; }
    
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 400px;
        height: 100vh;
        background: var(--bg-color);
        padding: calc(70px + var(--spacing-xl)) var(--spacing-xl) var(--spacing-xl);
        flex-direction: column;
        align-items: flex-start;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-xl);
        border-left: 1px solid var(--border-color);
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1.1rem;
        border-radius: var(--radius-md);
    }
    
    .nav-link::before {
        border-radius: var(--radius-md);
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-lg);
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    body.menu-open::after {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(4px);
        z-index: 999;
    }
    
    .hero-title { font-size: 3rem; }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-list li {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 576px) {
    :root {
        --container-padding: 0.75rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section { padding: var(--spacing-lg) 0; }
    
    .hero { padding-top: calc(80px + var(--spacing-lg)); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-0 { margin-top: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .site-header {
        background: rgba(17, 24, 39, 0.8);
        border-bottom-color: rgba(255, 255, 255, 0.05);
    }

    .site-header.scrolled {
        background: rgba(17, 24, 39, 0.95);
    }

    .nav-link {
        color: #e5e7eb;
    }

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

    .nav-link.active {
        background: rgba(37, 99, 235, 0.2);
    }

    .mobile-menu-toggle span {
        background: #e5e7eb;
    }

    .mobile-menu-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    @media (max-width: 768px) {
        .main-nav {
            background: var(--bg-color-dark);
            border-left-color: rgba(255, 255, 255, 0.1);
        }
    }
}