* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; color: #222; background: #fff; }

:root {
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --border: #e5e7eb;
}

.site-header { background: linear-gradient(180deg, #f8fafc, #ffffff); border-bottom: 1px solid var(--border); }
.nav { max-width: 1000px; margin: 0 auto; padding: 16px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-weight: 700; color: var(--text); text-decoration: none; }
.nav-links { list-style: none; display: flex; gap: 16px; margin: 0; padding: 0; }
.nav-links a { color: var(--text); text-decoration: none; }

.hero { max-width: 1000px; margin: 40px auto; padding: 40px 16px; text-align: center; }
.hero h1 { margin: 0 0 8px; font-size: 2.2rem; }
.hero p { margin: 0 0 16px; color: var(--muted); }
.btn { display: inline-block; padding: 10px 16px; background: var(--primary); color: #fff; border-radius: 8px; text-decoration: none; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); margin-left: 8px; }
.hero-actions { display: inline-flex; gap: 8px; }

.section { max-width: 1000px; margin: 0 auto; padding: 40px 16px; }
.section h2 { margin: 0 0 16px; font-size: 1.6rem; }
.skills { display: flex; gap: 8px; flex-wrap: wrap; list-style: none; padding: 0; }
.skills li { padding: 6px 10px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.project-card { border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.project-card h3 { margin-top: 0; }
.project-card .link { color: var(--primary); text-decoration: none; }

.contact-list { list-style: none; padding: 0; }
.contact-list li { margin: 6px 0; }

.site-footer { border-top: 1px solid var(--border); text-align: center; padding: 24px; color: var(--muted); }
.back-to-top { display: inline-block; margin-top: 8px; text-decoration: none; color: var(--primary); }