:root {
  --bg: #0e1116;
  --surface: #161b22;
  --line: #232a34;
  --line-strong: #364050;
  --text: #b9c1cd;
  --muted: #7f8a9b;
  --strong: #eef2f7;
  --accent: #6fd0c8;

  --font-head: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --line: #e1e5eb;
  --line-strong: #c3cad5;
  --text: #333b47;
  --muted: #5d6879;
  --strong: #0c1118;
  --accent: #0b736c;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s, color 0.2s;
}

a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; max-width: 68ch; }
strong { color: var(--strong); font-weight: 500; }

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--strong);
  letter-spacing: -0.01em;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 0.3rem;
}
.skip:focus { top: 1rem; }

/* ---------- Layout ---------- */

.shell {
  display: grid;
  grid-template-columns: minmax(16rem, 21rem) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  max-width: 76rem;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.side {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(3rem, 10vh, 6rem) 0 3rem;
}

.main { padding: clamp(3rem, 10vh, 6rem) 0 5rem; }

@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .side {
    position: static;
    height: auto;
    gap: 2rem;
    padding: 3rem 0 0.5rem;
  }
  .main { padding-top: 2.5rem; }
}

/* ---------- Sidebar ---------- */

.side h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.role {
  margin: 0.6rem 0 0;
  font-family: var(--font-head);
  font-size: 1.05rem;
  color: var(--strong);
}

.tagline {
  margin: 0.9rem 0 0;
  max-width: 30ch;
  color: var(--muted);
}

/* The one moving element: a pulse trace, a nod to the sensor signals in the work */
.trace-wrap {
  width: 8.75rem;
  height: 2rem;
  margin-top: 1.5rem;
  overflow: hidden;
  color: var(--accent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
}

.trace {
  display: block;
  width: 30rem;
  height: 2rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: scan 4.5s linear infinite;
}

@keyframes scan { to { transform: translateX(-15rem); } }

.tools {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 0.4rem;
  background: transparent;
  color: var(--strong);
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s;
}
.icon-btn:hover { border-color: var(--accent); background: var(--surface); }
.icon-btn svg { width: 1.1rem; height: 1.1rem; }

:root[data-theme="dark"] .i-moon,
:root[data-theme="light"] .i-sun { display: none; }

.nav ul {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.3rem 0;
  color: var(--muted);
  font-size: 0.8rem;
  transition: color 0.15s;
}
.nav a::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: currentColor;
  transition: width 0.2s;
}
.nav a:hover,
.nav a[aria-current] { color: var(--strong); }
.nav a:hover::before,
.nav a[aria-current]::before { width: 3rem; }

@media (max-width: 900px) {
  .nav ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; margin-top: 1.5rem; }
  .nav a::before { display: none; }
}

.social {
  list-style: none;
  display: flex;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}
.social a { display: block; color: var(--muted); transition: color 0.15s; }
.social a:hover { color: var(--accent); }
.social svg { display: block; width: 1.4rem; height: 1.4rem; }

/* ---------- Sections ---------- */

.section { margin-bottom: 4.5rem; scroll-margin-top: 3rem; }
.section > h2 { font-size: 1.3rem; margin-bottom: 1.25rem; }

/* ---------- Entries (experience, education, projects) ---------- */

.entry {
  display: block;
  margin: 0 -1.1rem 0.75rem;
  padding: 1rem 1.1rem;
  border-radius: 0.45rem;
  transition: background-color 0.15s;
}
a.entry:hover { background: var(--surface); }
a.entry:focus-visible { outline-offset: 0; }

.entry h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 0.5rem;
  font-size: 1rem;
  line-height: 1.5;
}
.entry h3 .at { font-weight: 400; color: var(--muted); }
.entry h3 .go {
  align-self: center;
  width: 0.95rem;
  height: 0.95rem;
  color: var(--muted);
  transition: transform 0.15s, color 0.15s;
}
a.entry:hover h3 .go { color: var(--accent); transform: translate(2px, -2px); }

.when {
  display: block;
  margin: 0.15rem 0 0.6rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.entry p { margin-bottom: 0.9rem; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tags li {
  padding: 0.05rem 0.65rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--strong);
  font-size: 0.72rem;
  line-height: 1.7;
}


/* ---------- Skills ---------- */

.skills { margin: 0; display: grid; gap: 1.25rem; }
.skills dt { margin-bottom: 0.4rem; color: var(--strong); font-weight: 500; }
.skills dd { margin: 0; }

/* ---------- Picture placeholders ---------- */
/* Swap a placeholder for a real picture:
   replace <div class="pic-ph">…</div> with <img src="…" alt="…"> */

.pic { margin: 0 0 2.5rem; }
.pic img { display: block; width: 100%; height: auto; border-radius: 0.45rem; }
.pic figcaption { margin-top: 0.6rem; color: var(--muted); font-size: 0.75rem; }

.pic-ph {
  display: grid;
  place-items: center;
  min-height: 8rem;
  padding: 0.5rem;
  border: 1px dashed var(--line-strong);
  border-radius: 0.45rem;
  background-color: var(--surface);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 1.25rem 1.25rem;
  background-position: -1px -1px;
  color: var(--muted);
  text-align: center;
}

.pic-ph span {
  padding: 0.2rem 0.6rem;
  border-radius: 0.25rem;
  background: var(--surface);
}
.pic--hero .pic-ph { aspect-ratio: 16 / 9; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1rem;
}
.gallery .pic { margin: 0; }

.gallery .pic-ph { aspect-ratio: 4 / 3; }
/* Let any placeholder box grow to fit a real picture placed inside it */
.pic .pic-ph:has(img) {
  display: block;
  aspect-ratio: auto;
  min-height: 0;
  padding: 0;
  border: 0;
  background: none;
}
.pic .pic-ph img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.45rem;
}

.pic--hero .pic-ph img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
}

/* ---------- Project pages ---------- */

.back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 0.8rem;
  transition: color 0.15s;
}
.back:hover { color: var(--accent); }
.back svg { width: 1rem; height: 1rem; }

.side--project h1 { font-size: clamp(1.5rem, 2.6vw, 1.9rem); }
.lede { margin: 1rem 0 0; color: var(--muted); }

.meta { margin: 2rem 0 0; display: grid; gap: 1rem; }
.meta dt { color: var(--muted); font-size: 0.75rem; }
.meta dd { margin: 0.1rem 0 0; color: var(--strong); }

.prose h2 { font-size: 1.2rem; margin: 3rem 0 1rem; }
.prose h2:first-child { margin-top: 0; }

.points { margin: 0 0 1.25rem; padding: 0; list-style: none; max-width: 68ch; }
.points li { position: relative; padding-left: 1.4rem; margin-bottom: 0.6rem; }
.points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 0.7rem;
  height: 1px;
  background: var(--accent);
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 4.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.pager a {
  display: block;
  padding: 0.9rem 1.1rem;
  margin: 0 -1.1rem;
  border-radius: 0.45rem;
  transition: background-color 0.15s;
}
.pager a:hover { background: var(--surface); }
.pager small { display: block; color: var(--muted); font-size: 0.75rem; }
.pager strong { font-family: var(--font-head); font-size: 0.95rem; }
.pager .next { text-align: right; grid-column: 2; }
@media (max-width: 560px) {
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; text-align: left; }
}

.foot { margin-top: 4rem; color: var(--muted); font-size: 0.75rem; }

/* ---------- Motion preferences ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .trace { animation: none; }
  *, *::before, *::after { transition: none !important; }
}

/* Optical balance: the filled GitHub mark reads larger than the outlined icons */
.social li:last-child svg { width: 1.25rem; height: 1.25rem; margin: 0.075rem; }

/* ===== Fluid layout: same proportions on every screen ===== */

/* Text size grows with the screen: ~10px on phones, ~13px at 1366px, ~16px at 1920px */
html { font-size: clamp(10px, 0.54vw + 5.6px, 20px); }

.shell {
  max-width: none;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.6fr);
  gap: 4vw;
  padding: 0 5vw;
}

/* Keep the sidebar beside the content on every screen (no stacking on phones) */
.side {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  gap: 0;
  padding: clamp(2rem, 10vh, 6rem) 0 3rem;
}
.main { padding-top: clamp(2rem, 10vh, 6rem); }

.nav ul { display: grid; gap: 0.15rem; margin-top: 2rem; }
.nav a::before { display: block; }

.side h1 { font-size: 2rem; }
.side--project h1 { font-size: 1.7rem; }

/* Let text use the full column instead of stopping at a fixed width */
p, .points { max-width: none; }

/* Phones: give the sidebar a bit more room */
@media (max-width: 700px) {
  .shell { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 5vw; }
}
.section:focus { outline: none; }