:root {
    --primary-bg: #0f172a;
    --secondary-bg: #1e293b;
    --accent: #3b82f6;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 10%;
    background: rgba(15, 23, 42, 0.95);
    position: fixed;
    width: 100%;
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: bold; }
.logo span { color: var(--accent); }

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover { color: var(--accent); }

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 10%;
}

.hero h1 { font-size: 4rem; line-height: 1.1; margin-bottom: 1rem; }
.hero h1 span { color: var(--accent); }

.hero-tags { margin-bottom: 2rem; color: var(--text-dim); letter-spacing: 1px; }

.btn-main {
    padding: 1rem 2.5rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.3s;
}

.btn-main:hover { transform: translateY(-5px); }

/* Services */
.services { padding: 100px 10%; }
.section-title { text-align: center; margin-bottom: 3rem; font-size: 2.5rem; }

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    transition: 0.3s;
    border: 1px solid transparent;
}

.service-card:hover { border-color: var(--accent); transform: translateY(-10px); }
.service-card i { font-size: 2.5rem; color: var(--accent); margin-bottom: 1rem; }

/* Projects */
.projects { padding: 50px 10%; background: #0b1120; }
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--secondary-bg);
    border-radius: 8px;
    overflow: hidden;
}

.project-img { height: 200px; background: #334155; } /* Placeholder */

.project-info { padding: 1.5rem; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav-links { display: none; }
}