:root {
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --text: #000000;
  --text-muted: #52525b;
  --text-faint: #6b6b73;
  --border: #e3e3e3;
  --border-strong: #949499;
  --accent: #000000;
  --accent-fg: #ffffff;
  --tag-bg: #f4f4f4;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 12px 32px rgba(0,0,0,0.06);
  --shadow-lift: 0 2px 6px rgba(0,0,0,0.06), 0 20px 48px rgba(0,0,0,0.12);
  --grid-line: rgba(0,0,0,0.035);
  --scrim: rgba(0,0,0,0.55);
  color-scheme: light;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

:root[data-theme="dark"] {
  --bg: #000000;
  --bg-elevated: #0c0c0c;
  --text: #ffffff;
  --text-muted: #a6a6ad;
  --text-faint: #8a8a92;
  --border: #232326;
  --border-strong: #6a6a72;
  --accent: #ffffff;
  --accent-fg: #000000;
  --tag-bg: #151517;
  --shadow: 0 1px 2px rgba(0,0,0,0.5), 0 12px 32px rgba(0,0,0,0.5);
  --shadow-lift: 0 2px 6px rgba(0,0,0,0.6), 0 20px 48px rgba(0,0,0,0.7);
  --grid-line: rgba(255,255,255,0.045);
  --scrim: rgba(0,0,0,0.75);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #000000;
    --bg-elevated: #0c0c0c;
    --text: #ffffff;
    --text-muted: #a6a6ad;
    --text-faint: #8a8a92;
    --border: #232326;
    --border-strong: #6a6a72;
    --accent: #ffffff;
    --accent-fg: #000000;
    --tag-bg: #151517;
    --shadow: 0 1px 2px rgba(0,0,0,0.5), 0 12px 32px rgba(0,0,0,0.5);
    --shadow-lift: 0 2px 6px rgba(0,0,0,0.6), 0 20px 48px rgba(0,0,0,0.7);
    --grid-line: rgba(255,255,255,0.045);
    --scrim: rgba(0,0,0,0.75);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-gutter: stable; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", ui-sans-serif, system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll { overflow: hidden; }

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 90% 55% at 50% 0%, black 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 90% 55% at 50% 0%, black 30%, transparent 85%);
}

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 100%;
  background: var(--accent);
  z-index: 40;
  transform: scaleX(0);
  transform-origin: left;
}

a { color: inherit; }
em { font-style: normal; font-weight: 600; color: var(--text); }

/* ---------- Reveal animation ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: calc(var(--d, 0) * 80ms);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px clamp(20px, 5vw, 56px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.nav.scrolled { box-shadow: 0 1px 12px rgba(0,0,0,0.06); }

.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: letter-spacing 0.3s var(--ease);
}
.brand:hover { letter-spacing: 0.1em; }
.brand-dot { opacity: 0.4; }

.nav-links { display: flex; gap: 22px; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  position: relative;
  font-family: var(--mono);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  transition: color 0.2s var(--ease);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

.icon-btn {
  flex: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.3s var(--ease);
}
.icon-btn:hover { border-color: var(--text); background: var(--tag-bg); }
#themeToggle:hover { transform: rotate(35deg); }

#iconMoon { display: none; }
:root[data-theme="dark"] #iconSun { display: none; }
:root[data-theme="dark"] #iconMoon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #iconSun { display: none; }
  :root:not([data-theme="light"]) #iconMoon { display: block; }
}

.menu-toggle { display: none; }

/* ---------- Layout ---------- */
main { max-width: 900px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 56px); }

section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 72px;
}
section:last-of-type { border-bottom: none; }

.sec-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }
h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
}
.num { color: var(--text-faint); }
.num::after { content: " /"; }
.sec-note { font-family: var(--mono); font-size: 0.78rem; color: var(--text-faint); margin-left: auto; }

.section-lede { color: var(--text-muted); max-width: 64ch; font-size: 1.02rem; margin: 0 0 28px; }

.sub-head {
  font-family: var(--mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin: 48px 0 22px;
  font-weight: 600;
}

/* ---------- Hero ---------- */
.hero { padding-top: 88px; }
.eyebrow { font-family: var(--mono); color: var(--text-faint); font-size: 0.78rem; margin: 0 0 18px; }
.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 0 22px;
  font-weight: 700;
}
.lede { font-size: 1.05rem; color: var(--text-muted); max-width: 62ch; margin: 0 0 32px; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 52px; }

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  padding: 11px 20px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              border-color 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { box-shadow: var(--shadow-lift); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.stat {
  background: var(--bg-elevated);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background 0.3s var(--ease);
}
.stat:hover { background: var(--tag-bg); }
.stat strong { font-family: var(--mono); font-size: 1.25rem; letter-spacing: -0.01em; }
.stat span {
  font-family: var(--mono);
  color: var(--text-faint);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---------- Values ---------- */
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.value {
  padding-left: 14px;
  border-left: 2px solid var(--border);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.value:hover { border-color: var(--accent); transform: translateX(3px); }
.value h3 { margin: 0 0 6px; font-size: 0.98rem; }
.value p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Process steps ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
.step {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.step::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  opacity: 0.04;
  transition: transform 0.4s var(--ease);
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); border-color: var(--border-strong); }
.step:hover::before { transform: scaleY(1); }
.step > * { position: relative; }
.step-num {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-faint);
  display: block;
  margin-bottom: 8px;
  line-height: 1;
  transition: color 0.3s var(--ease);
}
.step:hover .step-num { color: var(--text); }
.step h3 { margin: 0 0 8px; font-size: 0.98rem; }
.step p { margin: 0; color: var(--text-muted); font-size: 0.88rem; }

/* ---------- Case studies ---------- */
.case, .card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.case:hover, .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--border-strong); }
.case { padding: 28px; margin-bottom: 20px; }

.case-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.case h3, .card h3 { margin: 0 0 18px; font-size: 1.2rem; letter-spacing: -0.01em; }

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.metrics > div { display: flex; flex-direction: column; gap: 1px; }
.metrics strong { font-family: var(--mono); font-size: 1.35rem; letter-spacing: -0.01em; }
.metrics span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case p, .card p { color: var(--text-muted); font-size: 0.94rem; margin: 0 0 12px; }

.case-link, .linklike {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  margin-top: 6px;
  position: relative;
  transition: opacity 0.2s var(--ease);
}
.case-link::after, .linklike::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}
.case-link:hover::after, .linklike:hover::after { transform: scaleX(1); transform-origin: left; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { padding: 26px; display: flex; flex-direction: column; }
.card h3 { margin-bottom: 12px; font-size: 1.08rem; }
.card .case-link { margin-top: auto; align-self: flex-start; }

/* ---------- Tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 14px 0; }
.tags span {
  background: var(--tag-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.74rem;
  padding: 4px 10px;
  border-radius: 6px;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.tags span:hover {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ---------- Timeline ---------- */
.timeline { display: flex; flex-direction: column; gap: 34px; }
.entry-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.entry-head h3 { margin: 0; font-size: 1.05rem; }
.entry-org { color: var(--text-muted); font-size: 0.88rem; font-weight: 500; }
.entry-date { font-family: var(--mono); font-size: 0.75rem; color: var(--text-faint); margin-left: auto; }
.entry ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 0.94rem;
}
.entry li::marker { color: var(--text-faint); }

/* ---------- Skills ---------- */
.skills-grid { display: flex; flex-direction: column; gap: 22px; margin-bottom: 44px; }
.skill-group h3 {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  font-weight: 600;
}

.proficiency { display: flex; flex-direction: column; gap: 14px; }
.prof { display: flex; align-items: center; gap: 16px; }
.prof-label { font-size: 0.88rem; color: var(--text-muted); flex: 0 1 auto; min-width: 0; }
.prof-pct { font-family: var(--mono); font-size: 0.75rem; color: var(--text-faint); flex: none; }
.bar { flex: 1; height: 5px; background: var(--tag-bg); border-radius: 999px; overflow: hidden; min-width: 60px; }
.bar i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 999px;
  transition: width 1.1s var(--ease);
}

/* ---------- Contact ---------- */
.contact-email {
  display: inline-block;
  font-family: var(--mono);
  font-size: clamp(1.05rem, 3vw, 1.5rem);
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
  border-bottom: 2px solid var(--border);
  transition: border-color 0.3s var(--ease);
  overflow-wrap: anywhere;
}
.contact-email:hover { border-color: var(--accent); }

.contact-links { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 24px; align-items: center; }
.contact-links a, .contact-links .linklike {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-top: 0;
  transition: color 0.2s var(--ease);
}
.contact-links a:hover, .contact-links .linklike:hover { color: var(--text); }

footer {
  text-align: center;
  color: var(--text-faint);
  font-size: 0.78rem;
  padding: 32px 20px 52px;
  font-family: var(--mono);
}
footer p { margin: 0; }

/* ---------- Document viewer ---------- */
.viewer-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex: none;
}
.viewer-title {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.viewer-actions { display: flex; gap: 8px; margin-left: auto; flex: none; }
.viewer-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.viewer-btn:hover { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

.viewer-body { position: relative; flex: 1; min-height: 0; background: var(--tag-bg); }
.viewer-frame { width: 100%; height: 100%; border: none; display: block; }

.viewer-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.viewer-loading.hide { opacity: 0; }
.spinner {
  width: 14px; height: 14px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 14px;
    padding: 18px clamp(20px, 5vw, 56px);
    display: none;
    margin-left: 0;
  }
  .nav-links.open { display: flex; animation: slideDown 0.3s var(--ease); }
  @keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
  .menu-toggle { display: flex; order: 3; }
  #themeToggle { order: 2; margin-left: auto; }
  .sec-note { margin-left: 0; flex-basis: 100%; }
  .prof { flex-wrap: wrap; }
  .prof-label { flex-basis: 100%; font-size: 0.85rem; }
  .case, .card { padding: 22px; }
  .viewer-actions .viewer-btn { padding: 7px 9px; }
}

@media (max-width: 480px) {
  .stat-row { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Accessibility: skip link and focus ---------- */
.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
main:focus { outline: none; }

/* ---------- Hero role and availability ---------- */
.role {
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--text);
  margin: 0 0 20px;
}
.sep { margin: 0 10px; color: var(--text-faint); }

.avail {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 32px;
}
.avail .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 9px;
  flex: none;
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}

/* ---------- Evidence list (replaces proficiency bars) ---------- */
.evidence {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}
.ev {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s var(--ease);
}
.ev:hover { background: var(--tag-bg); }
.ev-k {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
}
.ev-v { color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Native dialog viewer ---------- */
dialog.viewer {
  align-items: stretch;
  width: min(1500px, 100vw);
  max-width: 100vw;
  height: 100dvh;
  max-height: 100dvh;
  padding: 0;
  border: none;
  background: var(--bg-elevated);
  color: var(--text);
  display: none;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lift);
}
dialog.viewer[open] { display: flex; animation: viewerIn 0.3s var(--ease); }
@keyframes viewerIn {
  from { opacity: 0; transform: translateY(14px) scale(0.99); }
  to { opacity: 1; transform: none; }
}
dialog.viewer::backdrop {
  background: var(--scrim);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

@media (min-width: 721px) {
  dialog.viewer {
    width: min(1500px, 96vw);
    height: calc(100dvh - 32px);
    max-height: calc(100dvh - 32px);
    border: 1px solid var(--border-strong);
    border-radius: 14px;
  }
}

.viewer-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  text-align: center;
  background: var(--bg-elevated);
}
.viewer-fallback[hidden] { display: none; }
.viewer-fallback p { margin: 0; color: var(--text-muted); font-size: 0.94rem; }

.viewer-loading.hide { opacity: 0; visibility: hidden; }