:root {
    --primary-color: #0f172a;
    --secondary-color: #2563eb; /* Blue 600 */
    --accent-color: #3b82f6; /* Blue 500 */
    --text-color: #334155;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--primary-color);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

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

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--secondary-color);
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--white) !important;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    display: inline-block;
    border: 1px solid var(--secondary-color);
}

.btn-primary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--white) !important;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    display: inline-block;
    border: 2px solid var(--white);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero_bg.jpg') center/cover no-repeat;
    z-index: -2;
    transform: scale(1.1);
    animation: zoomOut 20s infinite alternate;
}

@keyframes zoomOut {
    from { transform: scale(1.1); }
    to { transform: scale(1); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.7));
    z-index: -1;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: #cbd5e1;
}

/* Section Common */
.section {
    padding: 6rem 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-title h2 {
    font-size: 2.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

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

.icon-box {
    width: 60px;
    height: 60px;
    background-color: #eff6ff;
    color: var(--secondary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.link-arrow {
    color: var(--secondary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.link-arrow:hover {
    gap: 0.75rem;
}

/* Stats */
.stats-section {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 4rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: #94a3b8;
    font-weight: 500;
}

/* Image Text Section */
.image-text-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.image-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    transition: transform 0.5s;
}

.image-wrapper:hover img {
    transform: scale(1.05);
}

/* Testimonials */
.testimonial-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 12px;
    position: relative;
}

.stars {
    color: #fbbf24;
    margin-bottom: 1rem;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.client-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.client-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

/* CTA */
.cta-section {
    background: linear-gradient(rgba(37, 99, 235, 0.9), rgba(37, 99, 235, 0.9)), url('../images/contact_bg.jpg') center/cover fixed;
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.cta-content p {
    color: #dbeafe;
    margin-bottom: 2.5rem;
    font-size: 1.2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: #94a3b8;
    padding: 5rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-logo {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-col h3 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.social-links a:hover {
    background: var(--secondary-color);
    color: var(--white);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero h1 { font-size: 3rem; }
    .image-text-grid { grid-template-columns: 1fr; gap: 3rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
    .navbar { flex-wrap: wrap; }
    .mobile-menu-btn { display: block; }
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: 1rem 0;
        background: var(--white);
        position: absolute;
        top: 80px;
        left: 0;
        box-shadow: var(--shadow-lg);
    }
    .nav-links.active { display: flex; }
    .hero h1 { font-size: 2.5rem; }
    .footer-grid { grid-template-columns: 1fr; }
}