:root {
  --ink: #1b1f1d;
  --ink-soft: #4a524d;
  --paper: #faf8f4;
  --paper-raised: #ffffff;
  --line: #e4ded2;
  --accent: #2f5233;
  --accent-soft: #e7ede4;
  --max: 980px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(250, 248, 244, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.wordmark {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

.site-header nav a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-left: 28px;
  transition: color 0.15s ease;
}

.site-header nav a:hover { color: var(--accent); }

/* Hero */
.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 18px;
}

.hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.2;
  margin: 0 0 22px;
  max-width: 760px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 32px;
}

.hero-links { display: flex; gap: 14px; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: opacity 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { opacity: 0.88; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Projects */
.projects { padding: 80px 0; }

.section-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.6rem;
  margin: 0 0 40px;
}

.project {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

.project:last-child { border-bottom: 1px solid var(--line); }

.project-flagship { padding-top: 8px; }

.project-media { display: flex; justify-content: center; padding-top: 4px; }

.mark {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff;
}

.mark-rq { background: #3d6642; }
.mark-gala { background: #8a6d3b; }
.mark-qubo { background: #2f4a6b; }
.mark-battery { background: #1f6b74; }
.mark-quantum { background: #5a3d6b; }
.mark-optionqae { background: #a3572b; }
.mark-ftr { background: #6b2f4a; }
.mark-swing { background: #3d4f8a; }
.mark-derivrisk { background: #8a2f2f; }

.project-tag {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 6px;
}

.project-body h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.4rem;
  margin: 0 0 14px;
}

.project-desc {
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 680px;
}

.project-facts {
  margin: 0 0 18px;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.project-facts li { margin-bottom: 6px; }

.project-links a {
  display: inline-block;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.project-links a:hover { border-bottom-color: var(--accent); }

/* About */
.about { padding: 8px 0 80px; }

.about-inner p {
  max-width: 700px;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

/* Footer */
.site-footer {
  background: var(--accent-soft);
  border-top: 1px solid var(--line);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
  margin: 0 0 4px;
}

.footer-sub { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

.footer-links a {
  text-decoration: none;
  margin-left: 22px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.footer-links a:first-child { margin-left: 0; }

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

/* Touch devices (phones/tablets) get a bigger, wider layout — this device
   class is deliberately independent of viewport width, since the page
   forces a fixed-width viewport on mobile so it renders (then scales down
   to fit) like the desktop layout instead of a narrow stacked one. */
@media (hover: none) and (pointer: coarse) {
  :root { --max: 1080px; }

  .wordmark { font-size: 1.55rem; }

  .eyebrow { font-size: 0.98rem; }

  .hero h1 {
    font-size: clamp(2.3rem, 5vw, 3.6rem);
    margin: 0 0 24px;
    max-width: 880px;
  }

  .hero-sub {
    font-size: 1.3rem;
    max-width: 880px;
    margin: 0 0 36px;
  }

  .btn {
    padding: 14px 26px;
    font-size: 1.05rem;
  }

  .section-title { font-size: 2.15rem; }

  .project {
    grid-template-columns: 108px 1fr;
    padding: 40px 0;
  }

  .mark {
    width: 76px;
    height: 76px;
    border-radius: 16px;
    font-size: 1.75rem;
  }

  .project-tag { font-size: 0.85rem; margin: 0 0 8px; }

  .project-body h3 { font-size: 1.9rem; margin: 0 0 16px; }

  .project-desc {
    font-size: 1.15rem;
    margin: 0 0 18px;
    max-width: 900px;
  }

  .project-facts {
    margin: 0 0 20px;
    padding-left: 22px;
    font-size: 1.08rem;
    max-width: 900px;
  }

  .project-facts li { margin-bottom: 8px; }

  .project-links a { font-size: 1.4rem; }

  .about-inner p {
    font-size: 1.15rem;
    max-width: 900px;
  }

  .footer-title { font-size: 1.65rem; margin: 0 0 6px; }

  .footer-sub { font-size: 1.05rem; }

  .footer-links a { font-size: 1.05rem; }
}

/* Narrow browser windows (real small width, not the forced-viewport phone
   case above) — keeps the stacked single-column layout usable. */
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }

  .header-inner {
    height: auto;
    padding: 16px 0;
  }

  .wordmark { font-size: 1.2rem; }

  .site-header nav a {
    font-size: 0.82rem;
    margin-left: 16px;
  }

  .hero { padding: 56px 0 44px; }

  .hero-sub { font-size: 1rem; }

  .hero-links { flex-wrap: wrap; }

  .projects { padding: 56px 0; }

  .section-title { margin-bottom: 28px; }

  .project {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 30px 0;
  }

  .project-media { justify-content: flex-start; }

  .mark {
    width: 52px;
    height: 52px;
    font-size: 1.25rem;
    border-radius: 12px;
  }

  .project-body h3 { font-size: 1.45rem; }

  .about { padding: 4px 0 56px; }

  .site-footer { padding: 40px 0; }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-links a { margin-left: 0; font-size: 0.95rem; }
}