:root {
    --bg-color: #0F172A;
    --text-color: #E2E8F0;
    --primary-color: #38BDF8; /* Sky Blue */
    --secondary-color: #1E293B; /* Slate 800 */
    --accent-color: #06B6D4; /* Cyan */
    --border-color: #334155;
}

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--white);
    text-transform: uppercase;
}

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

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #94A3B8;
}

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

.btn-primary {
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    cursor: pointer;
}

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

/* Hero */
.hero {
    height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero_bg.jpg') center/cover;
    opacity: 0.4;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: #94A3B8;
    margin-bottom: 2.5rem;
    max-width: 500px;
}

/* Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.card {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #fff;
}

.card p {
    color: #94A3B8;
    font-size: 0.95rem;
}

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

.section-header {
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    font-weight: 700;
}

/* Footer */
footer {
    background: #020617;
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-links h4 {
    color: #fff;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.footer-links ul li {
    list-style: none;
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #64748b;
}

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

.copyright {
    text-align: center;
    color: #475569;
    font-size: 0.85rem;
    padding-top: 2rem;
    border-top: 1px solid #1e293b;
}

/* Utilities */
.text-center { text-align: center; }
.mb-2 { margin-bottom: 2rem; }

/* Mobile */
.menu-toggle {
    display: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--secondary-color);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active { display: flex; }

    .hero h1 { font-size: 2.5rem; }
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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