/* ---------- Design tokens ---------- */
:root {
  --bg: #f7f7f5;
  --bg-alt: #ffffff;
  --text: #1a1d1f;
  --text-muted: #5b6166;
  --border: #e4e2dd;
  --accent: #2451b3;
  --accent-dark: #1b3c8c;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --wrap: 1080px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { margin: 0 0 0.5em; line-height: 1.2; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(247, 247, 245, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.main-nav {
  display: flex;
  gap: 28px;
}
.main-nav a {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}
.main-nav a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
}

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
}
.hero-inner { max-width: 680px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 12px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 0 0 32px;
  max-width: 56ch;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Sections ---------- */
.skills, .portfolio, .contact {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}
.skills h2, .portfolio h2, .contact h2 {
  font-size: 1.7rem;
  letter-spacing: -0.01em;
}

/* ---------- Skills grid ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.skill-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.skill-card h3 {
  font-size: 1.05rem;
  margin-bottom: 14px;
}
.skill-card li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding: 4px 0;
}

/* ---------- Portfolio grid ---------- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.portfolio-card {
  display: block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.portfolio-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.portfolio-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--accent);
}
.portfolio-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}
.portfolio-note {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ---------- Contact ---------- */
.contact-inner { max-width: 620px; }
.contact-lead {
  color: var(--text-muted);
  margin-bottom: 28px;
}
.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.freelance-note {
  font-size: 0.88rem;
  color: var(--text-muted);
}
.freelance-note a {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.site-footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
  }
  .nav-toggle { display: flex; }
  .hero { padding: 64px 0 48px; }
}