:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --surface-2: #f2f1ed;
  --text: #16181d;
  --muted: #5d6270;
  --border: #e3e1db;
  --accent: #1d3fbb;
  --accent-soft: #e8edfc;
  --gold: #c9971c;
  --shadow: 0 1px 2px rgba(20, 20, 30, 0.04), 0 8px 24px rgba(20, 20, 30, 0.06);
  --radius: 14px;
  --max: 1040px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-2: #1e222b;
    --text: #eceef3;
    --muted: #9aa1b2;
    --border: #2a2f3a;
    --accent: #8ea8ff;
    --accent-soft: #1d2540;
    --gold: #f2c65a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --text: #eceef3;
  --muted: #9aa1b2;
  --border: #2a2f3a;
  --accent: #8ea8ff;
  --accent-soft: #1d2540;
  --gold: #f2c65a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: 1.6rem; font-weight: 650; }
h3 { font-size: 1.1rem; font-weight: 600; }

p { margin: 0 0 1em; }

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

.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.muted { color: var(--muted); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

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

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

.tabs a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.tabs a:hover { color: var(--text); background: var(--surface-2); }

.tabs a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- Panels (tabs) ---------- */
.panel { padding: 64px 0 88px; }

/* With JS on, only the active tab's panel shows. Without JS, all stack. */
.js .panel[hidden] { display: none; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero .role {
  font-size: 1.25rem;
  color: var(--muted);
  margin-bottom: 20px;
}

.hero .lead {
  font-size: 1.08rem;
  max-width: 560px;
}

.portrait {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 5;
  max-width: 380px;
  justify-self: end;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.92rem;
  color: var(--muted);
  margin: 20px 0 28px;
}

/* ---------- Buttons ---------- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  transition: transform 0.15s, border-color 0.15s;
}

.btn:hover { transform: translateY(-1px); border-color: var(--muted); }

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

:root[data-theme="dark"] .btn.primary { color: #0f1115; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn.primary { color: #0f1115; }
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Sections ---------- */
.section { margin-top: 72px; }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section-head h2 { margin: 0; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.focus-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.focus-card .num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 10px;
}

.focus-card p { color: var(--muted); margin: 0; font-size: 0.95rem; }

blockquote {
  margin: 0;
  padding: 32px 36px;
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: 1.2rem;
  line-height: 1.5;
}

blockquote cite {
  display: block;
  margin-top: 12px;
  font-size: 0.9rem;
  font-style: normal;
  color: var(--muted);
}

/* ---------- Project cards ---------- */
.projects {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
}

.project:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.project .thumb {
  aspect-ratio: 16 / 10;
  background: var(--surface-2);
  overflow: hidden;
}

.project .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.project:hover .thumb img { transform: scale(1.03); }

.project .body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project .body p {
  color: var(--muted);
  font-size: 0.95rem;
  flex: 1;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tags li {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
}

.project .more {
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

/* ---------- Experience timeline ---------- */
.exp-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}

.timeline > li {
  position: relative;
  padding: 0 0 36px 28px;
}

.timeline > li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}

.timeline .when {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.timeline h3 { margin: 2px 0 2px; }

.timeline .org {
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.timeline ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline ul li { margin-bottom: 4px; }

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card h3 {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
}

.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.contact-card svg { width: 26px; height: 26px; color: var(--accent); margin-bottom: 8px; }
.contact-card strong { font-size: 1.05rem; }
.contact-card span { color: var(--muted); font-size: 0.9rem; word-break: break-word; }

/* ---------- Project detail pages ---------- */
.detail { padding: 48px 0 88px; }

.back {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  margin-bottom: 32px;
}

.detail-head { max-width: 760px; margin-bottom: 36px; }
.detail-head .role { font-size: 1.15rem; color: var(--muted); }

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 28px 0 40px;
}

.facts dt {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.facts dd { margin: 2px 0 0; font-weight: 500; }

.hero-img {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
  margin-bottom: 40px;
}

.hero-img img { margin: 0 auto; max-height: 620px; object-fit: contain; }

.prose { max-width: 720px; }
.prose h2 { margin-top: 40px; font-size: 1.35rem; }
.prose ul { padding-left: 20px; }

.embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 16px 0 8px;
  background: var(--surface-2);
}

.embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.metadata-list {
  list-style: none;
  padding: 20px 24px;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius);
}

.metadata-list li { padding: 4px 0; }

.fact-box {
  margin-top: 32px;
  padding: 24px;
  background: var(--surface-2);
  border-radius: var(--radius);
}

.fact-box button {
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 10px 18px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
}

.fact-box p { margin: 14px 0 0; font-style: italic; min-height: 1.6em; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 36px; }
  .portrait { justify-self: start; max-width: 300px; order: -1; }
  .grid-3, .contact-grid { grid-template-columns: 1fr; }
  .exp-layout { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .projects { grid-template-columns: 1fr; }
  .panel { padding: 40px 0 64px; }
  .topbar .container { height: auto; flex-direction: column; align-items: flex-start; gap: 6px; padding-top: 12px; padding-bottom: 8px; }
  .tabs { width: 100%; margin-left: -8px; }
  .portrait { max-width: 220px; aspect-ratio: 1 / 1; }
  blockquote { padding: 24px; font-size: 1.05rem; }
}

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