/* ── Reset & Base ────────────────────────────────────── */

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

:root {
  --bg: #fafafa;
  --fg: #111;
  --muted: #777;
  --border: #e5e5e5;
  --accent: #111;
  --radius: 12px;
  --max-w: 1120px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ── Navigation ─────────────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

nav.scrolled {
  border-bottom-color: var(--border);
}

.logo {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
}

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

/* ── Hero ────────────────────────────────────────────── */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 48px;
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.hero-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-sub {
  margin-top: 32px;
  font-size: 18px;
  color: var(--muted);
}

.scroll-cue {
  position: absolute;
  bottom: 48px;
  left: 48px;
  font-size: 24px;
  color: var(--muted);
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ── Section Titles ──────────────────────────────────── */

.section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 48px;
}

/* ── Projects ────────────────────────────────────────── */

.projects {
  padding: 120px 48px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.project-card {
  display: block;
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.project-card::before {
  content: attr(data-number);
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.project-card:hover {
  border-color: #ccc;
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

.project-info h3 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.project-info p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-tag {
  display: inline-block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ── About ───────────────────────────────────────────── */

.about {
  padding: 120px 48px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.about-content {
  max-width: 600px;
}

.about-text {
  font-size: 20px;
  line-height: 1.7;
  letter-spacing: -0.01em;
}

.about-text.muted {
  color: var(--muted);
  margin-top: 24px;
  font-size: 17px;
}

/* ── Footer ──────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 80px 48px;
}

.footer-content {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}

.footer-heading {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 16px;
}

.footer-email {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  display: inline-block;
  position: relative;
  transition: opacity 0.2s;
}

.footer-email:hover {
  opacity: 0.6;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 48px;
}

.footer-links a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--fg);
}

.footer-copy {
  margin-top: 48px;
  font-size: 13px;
  color: var(--muted);
}

/* ── Reveal Animations ───────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 768px) {
  nav {
    padding: 20px 24px;
  }

  .nav-links {
    gap: 24px;
  }

  .hero {
    padding: 0 24px;
  }

  .scroll-cue {
    left: 24px;
    bottom: 32px;
  }

  .projects {
    padding: 80px 24px;
  }

  .project-card {
    padding: 24px;
  }

  .project-info h3 {
    font-size: 22px;
  }

  .about {
    padding: 80px 24px;
  }

  .about-text {
    font-size: 17px;
  }

  footer {
    padding: 60px 24px;
  }

  .footer-links {
    gap: 24px;
  }
}