:root {
  --bg: #F7F4EC;
  --bg-raised: #FDFCF8;
  --ink: #16222D;
  --ink-soft: #3C4B58;
  --muted: #6C7A85;
  --accent: #A9682E;
  --accent-ink: #FFFFFF;
  --line: #2F5A82;
  --line-soft: rgba(47, 90, 130, 0.22);
  --grid-line: rgba(47, 90, 130, 0.09);
  --tag-bg: rgba(47, 90, 130, 0.08);
  --shadow: rgba(22, 34, 45, 0.14);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131E29;
    --bg-raised: #182735;
    --ink: #EFE8D8;
    --ink-soft: #C7D2D9;
    --muted: #8CA0AC;
    --accent: #E0A052;
    --accent-ink: #16222D;
    --line: #6FA0C4;
    --line-soft: rgba(111, 160, 196, 0.3);
    --grid-line: rgba(111, 160, 196, 0.09);
    --tag-bg: rgba(111, 160, 196, 0.1);
    --shadow: rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #131E29;
  --bg-raised: #182735;
  --ink: #EFE8D8;
  --ink-soft: #C7D2D9;
  --muted: #8CA0AC;
  --accent: #E0A052;
  --accent-ink: #16222D;
  --line: #6FA0C4;
  --line-soft: rgba(111, 160, 196, 0.3);
  --grid-line: rgba(111, 160, 196, 0.09);
  --tag-bg: rgba(111, 160, 196, 0.1);
  --shadow: rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-weight: 600;
  text-wrap: balance;
  margin: 0;
  color: var(--ink);
}

a { color: var(--accent); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.mono {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

.eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--line);
  display: flex;
  align-items: center;
  gap: 0.6em;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--line);
  display: inline-block;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 56px);
}

/* ---------- Header ---------- */

header.site {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line-soft);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(20px, 5vw, 56px);
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--line);
  display: grid;
  place-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--line);
  flex-shrink: 0;
}

.brand-text {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand-text span { color: var(--muted); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 40;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  padding: 10px 16px;
  text-decoration: none;
}

.skip-link:focus {
  left: clamp(20px, 5vw, 56px);
  top: 10px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--line);
  background: var(--tag-bg);
  border: 1px solid var(--line-soft);
  padding: 6px 11px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

.theme-toggle-icon {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  background: linear-gradient(90deg, currentColor 0 50%, transparent 50% 100%);
  flex-shrink: 0;
}

nav.links {
  display: flex;
  gap: clamp(16px, 3vw, 32px);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

nav.links a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.15s ease, color 0.15s ease;
}

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

/* ---------- Hero ---------- */

.hero {
  padding: clamp(56px, 9vw, 108px) 0 clamp(48px, 7vw, 84px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: clamp(32px, 6vw, 64px);
  align-items: start;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  line-height: 1.04;
  margin-top: 14px;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  margin-top: 22px;
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: var(--ink-soft);
  max-width: 46ch;
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 13px 22px;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn:hover { transform: translateY(-2px); }

/* Title block, echoing an engineering drawing's info box */

.titleblock {
  border: 1.5px solid var(--line);
  background: var(--bg-raised);
  box-shadow: 4px 4px 0 var(--line-soft);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  margin-top: 8px;
}

.titleblock-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.titleblock-row:last-child { border-bottom: none; }

.titleblock-row dt { color: var(--muted); }
.titleblock-row dd { margin: 0; color: var(--ink); text-align: right; font-weight: 500; }

.titleblock-row.status dd { color: var(--accent); }

/* ---------- Section shell ---------- */

section {
  padding: clamp(48px, 8vw, 88px) 0;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(32px, 5vw, 48px);
  max-width: 62ch;
}

.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }

.panel {
  border: 1px solid var(--line-soft);
  background: var(--bg-raised);
  position: relative;
  padding: clamp(20px, 3vw, 30px);
}

.panel::before, .panel::after,
.corner-tl, .corner-br {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--line);
}

.panel::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.panel::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.photo-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  border: 1.5px solid var(--line);
  padding: 10px;
}

.photo-frame::before, .photo-frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--accent);
}
.photo-frame::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.photo-frame::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.96) contrast(1.02);
}

.bio p { color: var(--ink-soft); margin: 0 0 16px; max-width: 62ch; }
.bio p:last-child { margin-bottom: 0; }

.credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  list-style: none;
  padding: 0;
}

.credentials li {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.01em;
  border: 1px solid var(--line-soft);
  background: var(--tag-bg);
  padding: 7px 12px;
  color: var(--ink-soft);
}

.credentials li b { color: var(--ink); font-weight: 600; }

/* ---------- Expertise ---------- */

.expertise-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(20px, 3vw, 28px);
}

.tech-tags {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.tech-tag {
  border: 1px solid var(--line-soft);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tech-tag .code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent);
}

.tech-tag .full {
  font-size: 0.78rem;
  color: var(--muted);
}

.side-stack { display: flex; flex-direction: column; gap: 20px; }

.side-panel h3 {
  font-size: 1.05rem;
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 12px;
  color: var(--ink);
}

.side-panel ul { margin: 0; padding: 0; list-style: none; }

.side-panel li {
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.side-panel li:last-child { border-bottom: none; }

/* ---------- Location ---------- */

.location-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.coord {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  color: var(--line);
  margin-top: 10px;
}

.lang-row {
  display: flex;
  gap: 14px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.lang-chip {
  border: 1px solid var(--line-soft);
  background: var(--tag-bg);
  padding: 10px 14px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.lang-chip .code { font-family: "IBM Plex Mono", monospace; font-weight: 600; color: var(--accent); font-size: 0.8rem; }
.lang-chip .level { font-size: 0.86rem; color: var(--ink-soft); }

.map-panel {
  border: 1px solid var(--line-soft);
  background: var(--bg-raised);
  padding: 0;
  position: relative;
  overflow: hidden;
  max-width: 360px;
  margin: 0 auto;
}

.map-panel svg {
  width: 100%;
  height: auto;
  aspect-ratio: 380 / 460;
  display: block;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}

.map-panel svg:active { cursor: grabbing; }

.map-toolbar {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.map-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-raised) 88%, transparent);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.map-btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.map-btn-reset { font-size: 0.8rem; }

.map-hint {
  position: absolute;
  left: 10px;
  bottom: 8px;
  z-index: 2;
  font-size: 0.66rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: color-mix(in srgb, var(--bg-raised) 82%, transparent);
  padding: 3px 8px;
  pointer-events: none;
}

/* ---------- Contact ---------- */

.contact-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(28px, 5vw, 48px);
  align-items: center;
  border: 1.5px solid var(--line);
  background: var(--bg-raised);
  padding: clamp(28px, 5vw, 48px);
  position: relative;
}

.contact-panel h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); }
.contact-panel p { color: var(--ink-soft); margin-top: 14px; max-width: 46ch; }

.record {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.92rem;
}

.record-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.record-row:first-child { padding-top: 0; }
.record-row:last-child { border-bottom: none; padding-bottom: 0; }

.record-row dt { color: var(--muted); font-size: 0.76rem; letter-spacing: 0.06em; text-transform: uppercase; }
.record-row dd { margin: 0; }
.record-row a { color: var(--ink); text-decoration: none; font-weight: 600; border-bottom: 1px solid var(--line); }
.record-row a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--line-soft);
  padding: 28px 0 40px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero-grid, .about-grid, .expertise-grid, .location-grid, .contact-panel {
    grid-template-columns: 1fr;
  }
  .about-grid .photo-frame { max-width: 280px; }
  nav.links a { display: none; }
  .theme-toggle-label { display: none; }
  .theme-toggle { padding: 7px 9px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}