/* ---------- theme tokens ---------- */
:root {
  --bg: #f0ede4;
  --bg-soft: #e8e4d8;
  --fg: #2b2724;
  --fg-soft: #6b645b;
  --accent: #b0673b;
  --accent-soft: #c98a5f;
  --card: #f6f3ec;
  --border: #d9d3c5;
  --deco: rgba(43, 39, 36, 0.06);
  --shadow: rgba(43, 39, 36, 0.08);
}
:root[data-theme="dark"] {
  --bg: #1a1815;
  --bg-soft: #211e1a;
  --fg: #ece7dd;
  --fg-soft: #9c9488;
  --accent: #cd8154;
  --accent-soft: #b0673b;
  --card: #232019;
  --border: #35302a;
  --deco: rgba(236, 231, 221, 0.05);
  --shadow: rgba(0, 0, 0, 0.3);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: "Space Grotesk", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

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

/* ---------- topbar ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; justify-content: center; padding: 18px 16px;
  pointer-events: none;
}
.topbar-inner {
  pointer-events: auto;
  width: min(860px, 94vw);
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 10px 8px 18px;
  box-shadow: 0 4px 20px var(--shadow);
  backdrop-filter: blur(6px);
}
.topbar-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* ---------- sticky section nav ---------- */
.section-nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.section-nav::-webkit-scrollbar { display: none; }
.section-nav a {
  white-space: nowrap; padding: 6px 12px; border-radius: 999px;
  font-size: 13px; color: var(--fg-soft); transition: color 0.2s ease, background 0.2s ease;
}
.section-nav a:hover { color: var(--fg); background: var(--bg-soft); }
.section-nav a.is-active { color: var(--accent); background: var(--bg-soft); }
.chip-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 34px; padding: 0 12px;
  border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--fg);
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}
.chip-btn:hover { transform: translateY(-1px); background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- left rail ---------- */
.rail {
  position: fixed; left: 18px; top: 50%; transform: translateY(-50%);
  z-index: 40; display: flex; flex-direction: column; gap: 18px;
}
.rail a {
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 50%; border: 1px solid var(--border);
  background: var(--card); color: var(--accent);
  font-family: "IBM Plex Mono", monospace; font-size: 13px; font-weight: 600;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}
.rail a:hover { transform: scale(1.12); background: var(--accent); color: #fff; }

/* ---------- decorative letters ---------- */
.deco { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.deco-l {
  position: absolute; font-family: "Space Grotesk", sans-serif; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1px var(--deco); font-size: 22vw; line-height: 1;
}
.deco-1 { top: 30%; left: -3%; }
.deco-2 { top: 8%; right: 2%; }
.deco-3 { top: 5%; left: 8%; font-size: 14vw; }
.deco-4 { bottom: 2%; left: 6%; }

/* ---------- sections ---------- */
main { position: relative; z-index: 1; }
.section {
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center;
  padding: 120px clamp(24px, 8vw, 140px) 100px;
  max-width: 1200px; margin: 0 auto;
}
.eyebrow {
  font-family: "IBM Plex Mono", monospace; text-transform: uppercase;
  letter-spacing: 0.2em; font-size: 12px; color: var(--accent); margin-bottom: 12px;
}
.section-title { font-size: clamp(32px, 5vw, 58px); font-weight: 700; line-height: 1.05; }
.section-note { color: var(--fg-soft); margin-top: 10px; font-size: 15px; }
.group-title {
  margin: 46px 0 18px; font-size: 15px; font-weight: 600;
  color: var(--fg-soft); font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase; letter-spacing: 0.12em;
}

/* ---------- hero ---------- */
.hero { align-items: center; text-align: center; }
.hero-name {
  font-size: clamp(64px, 18vw, 260px); font-weight: 700; letter-spacing: -0.02em;
  color: var(--accent); line-height: 0.9;
}
.hero-sub { margin-top: 18px; color: var(--fg-soft); font-size: clamp(14px, 2vw, 20px); }

/* ---------- hero stats ---------- */
.hero-stats {
  display: flex; align-items: center; justify-content: center; gap: clamp(16px, 4vw, 48px);
  margin-top: 40px; flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.stat-num {
  font-size: clamp(30px, 5vw, 52px); font-weight: 700; color: var(--fg); line-height: 1;
  font-family: "Space Grotesk", sans-serif;
}
.stat-label {
  font-family: "IBM Plex Mono", monospace; font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--fg-soft);
}
.stat-sep { width: 1px; height: 40px; background: var(--border); }
.scroll-hint {
  margin-top: 48px; font-family: "IBM Plex Mono", monospace; font-size: 12px;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--fg-soft);
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ---------- about ---------- */
.about-grid { margin-top: 34px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.about-text p { color: var(--fg-soft); font-size: 17px; margin-bottom: 14px; max-width: 46ch; }
.stack-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.stack-chips li {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--card); font-size: 13px; color: var(--fg);
  font-family: "IBM Plex Mono", monospace;
}

/* ---------- timeline (experience) ---------- */
.timeline { margin-top: 40px; position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px; background: var(--border);
}
.timeline-item { position: relative; margin-bottom: 44px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute; left: -28px; top: 6px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg); box-shadow: 0 0 0 2px var(--accent);
}
.timeline-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.timeline-role { font-size: clamp(20px, 3vw, 28px); font-weight: 700; line-height: 1.2; }
.timeline-period {
  font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--fg-soft);
  white-space: nowrap; border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px;
}
.timeline-org { margin: 6px 0 14px; color: var(--accent); font-size: 14px; font-weight: 500; }
.timeline-bullets { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.timeline-bullets li {
  position: relative; padding-left: 22px; color: var(--fg-soft); font-size: 15.5px; line-height: 1.55;
}
.timeline-bullets li::before {
  content: "—"; position: absolute; left: 0; color: var(--accent); font-weight: 600;
}
.timeline-bullets a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.timeline-bullets code {
  font-family: "IBM Plex Mono", monospace; font-size: 0.9em; background: var(--bg-soft);
  padding: 1px 5px; border-radius: 5px;
}

/* ---------- CTA ---------- */
.cta-card {
  width: 100%; max-width: 760px; text-align: center;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 28px; padding: clamp(32px, 6vw, 64px);
  box-shadow: 0 20px 60px var(--shadow);
}
.cta-status {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: "IBM Plex Mono", monospace; font-size: 13px; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px; padding: 7px 16px; margin-bottom: 22px;
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: #3fae5a; box-shadow: 0 0 0 0 rgba(63,174,90,.5); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(63,174,90,.5);} 70%{ box-shadow:0 0 0 10px rgba(63,174,90,0);} 100%{box-shadow:0 0 0 0 rgba(63,174,90,0);} }
.cta-title { font-size: clamp(28px, 4vw, 44px); font-weight: 700; }
.cta-desc { color: var(--fg-soft); margin: 14px 0 28px; font-size: 17px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  padding: 13px 28px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-soft); font-weight: 600; font-size: 15px; cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-soft); }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-top: 24px; }
.card {
  position: relative; display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: 18px; padding: 22px; transition: transform 0.18s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card::after {
  content: "↗"; position: absolute; top: 16px; right: 18px; color: var(--accent);
  opacity: 0; transform: translate(-4px, 4px); transition: opacity 0.2s ease, transform 0.2s ease;
  font-size: 16px; font-weight: 700;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 14px 34px var(--shadow); }
.card:hover::after { opacity: 1; transform: translate(0, 0); }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.card-name { font-weight: 600; font-size: 17px; word-break: break-word; }
.card-star { font-size: 13px; color: var(--accent); font-family: "IBM Plex Mono", monospace; white-space: nowrap; }
.card-desc { color: var(--fg-soft); font-size: 14.5px; }
.card-desc code { font-family: "IBM Plex Mono", monospace; font-size: 0.9em; background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; }
.card-meta { display: block; margin-top: 12px; font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--fg-soft); }
.os-card .card-tag {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: #fff; background: #3fae5a; padding: 3px 9px; border-radius: 999px; white-space: nowrap;
}
.os-card::after { display: none; } /* tag occupies the top-right corner on OS cards */

/* ---------- footer ---------- */
.footer { min-height: 60vh; align-items: flex-start; }
.footer-links { display: flex; flex-direction: column; gap: 12px; margin-top: 26px; }
.footer-links a { font-size: clamp(20px, 3vw, 34px); font-weight: 600; color: var(--accent); width: fit-content; }
.footer-links a:hover { text-decoration: underline; }
.footer-note { margin-top: 40px; color: var(--fg-soft); font-family: "IBM Plex Mono", monospace; font-size: 12px; }

/* ---------- reveal animation base ---------- */
.reveal { opacity: 0; transform: translateY(24px); }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; gap: 24px; }
  .rail { left: 8px; gap: 12px; }
  .rail a { width: 30px; height: 30px; font-size: 11px; }
  .section { padding: 110px 20px 80px; }
  .topbar-inner { padding: 6px 8px 6px 12px; }
  .section-nav a { padding: 5px 9px; font-size: 12px; }
  .stat-sep { display: none; }
  .hero-stats { gap: 20px 32px; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .scroll-hint, .dot { animation: none; }
}