/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink:       #0f1117;
  --ink-muted: #4b5563;
  --bg:        #ffffff;
  --bg-alt:    #f7f8fa;
  --border:    #e5e7eb;
  --accent:    #1d4ed8;
  --accent-lt: #eff6ff;
  --radius:    10px;
  --max-w:     860px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  text-decoration: none;
}

.brand-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.brand-tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

/* ── Hero ── */
.hero {
  padding: 5rem 1.5rem 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-lt);
  padding: 0.25rem 0.65rem;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--ink);
  max-width: 600px;
  margin-bottom: 1.25rem;
}

.hero p {
  font-size: 1.125rem;
  color: var(--ink-muted);
  max-width: 500px;
  line-height: 1.7;
}

/* ── Sections ── */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.section:last-child { border-bottom: none; }

.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section p {
  color: var(--ink-muted);
  max-width: 580px;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

.section p:last-child { margin-bottom: 0; }

/* ── Project Cards ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.project-card {
  display: block;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--bg);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.project-card:hover {
  border-color: #93c5fd;
  box-shadow: 0 4px 20px rgba(29, 78, 216, 0.08);
  transform: translateY(-2px);
}

.project-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent-lt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.375rem;
}

.project-card p {
  font-size: 0.875rem;
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.project-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.project-link::after {
  content: " →";
  transition: margin-left 0.15s;
}

.project-card:hover .project-link::after {
  margin-left: 3px;
}

/* ── Footer ── */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .projects-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .section { padding: 2.5rem 1.25rem; }
}