:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

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

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

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

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

/* Hero Section */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

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

.hero p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 5px;
    transition: background 0.3s, transform 0.2s;
}

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

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

.section-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--accent-color);
}

/* Skills Grid */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag {
    background: var(--card-bg);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    border: 1px solid #334155;
    font-size: 0.9rem;
    color: var(--accent-color);
}

/* Projects Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #334155;
    transition: transform 0.3s, border-color 0.3s;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
}

.project-info {
    padding: 2rem;
}

.project-info h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.tags {
    display: flex;
    gap: 0.5rem;
}

.tags span {
    font-size: 0.75rem;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

/* Contact */
.contact {
    text-align: center;
}

.email-link {
    font-size: 1.5rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid #334155;
}

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