* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #1d2939;
    background: #f8fafc;
}
.container {
    width: min(100%, 1200px);
    margin: 0 auto;
    padding: 1.5rem;
}
.site-header {
    background: #020617;
    color: #fff;
    padding: 1rem 0.75rem;
}
.site-header h1 {
    font-size: 1.75rem;
}
.site-header p {
    color: #cbd5e1;
    margin-bottom: 0.75rem;
}
nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
nav a {
    color: #e2e8f0;
    text-decoration: none;
    padding: 0.3rem 0.65rem;
    border-radius: 0.35rem;
    transition: background .2s ease;
}
nav a:hover,
nav a.active {
    background: #2563eb;
    color: #fff;
}
.hero {
    margin: 1.5rem 0;
    background: #fff;
    border: 1px solid #e2e8f0;
    padding: 1.5rem;
    border-radius: 0.75rem;
}
.hero h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}
.hero p {
    color: #475569;
    margin-bottom: 1rem;
}
.btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    border: 0;
    padding: 0.65rem 1rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}
.services,.tech-stack,.projects,.contact-form {
    margin: 1rem 0;
    background: #fff;
    border: 1px solid #e2e8f0;
    padding: 1rem;
    border-radius: 0.75rem;
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}
.tech-grid h4, .services h4 {
    margin-bottom: 0.5rem;
}
.tech-grid ul,
.services p {
    margin: 0;
    color: #334155;
}
.project-card {
    border: 1px solid #cbd5e1;
    border-radius: 0.65rem;
    margin: 0.5rem 0;
    padding: 0.9rem;
}
.project-card h3 {
    margin-bottom: 0.45rem;
}
.contact-form form {
    display: grid;
    gap: 0.7rem;
}
.contact-form label {
    font-weight: 600;
}
.contact-form input,
.contact-form textarea {
    border: 1px solid #cbd5e1;
    border-radius: 0.45rem;
    padding: 0.65rem;
    width: 100%;
}
.form-message {
    margin-top: 0.5rem;
    color: #0f766e;
}
.site-footer {
    text-align: center;
    padding: 1rem 0;
    background: #020617;
    color: #cbd5e1;
}
@media (max-width: 640px) {
    .hero h2 { font-size: 1.5rem; }
}