:root {
  --os-bg: #070b12;
  --window: #0a1019;
  --panel: #101826;
  --panel-2: #131c2b;
  --line: rgb(255 255 255 / 0.09);
  --text: #e6edf3;
  --muted: #8d9aab;
  --cyan: #38bdf8;
  --emerald: #34d399;
  --amber: #fbbf24;
  --blue: #60a5fa;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bar: 2.25rem;
  --dock: 4.5rem;
}

.sprite { display: none; }

svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
svg.fill { fill: currentColor; stroke: none; }

/* ---------- Shell ---------- */

#os {
  position: fixed;
  inset: 0;
  display: none;
  grid-template-rows: var(--bar) 1fr var(--dock);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  background:
    radial-gradient(60rem 40rem at 80% -10%, rgb(56 189 248 / 0.14), transparent 60%),
    radial-gradient(50rem 36rem at 0% 110%, rgb(167 139 250 / 0.12), transparent 60%),
    linear-gradient(rgb(255 255 255 / 0.025) 1px, transparent 1px) 0 0 / 100% 2.5rem,
    linear-gradient(90deg, rgb(255 255 255 / 0.025) 1px, transparent 1px) 0 0 / 2.5rem 100%,
    var(--os-bg);
}

body[data-os] #os { display: grid; }
body[data-os] #hud,
body[data-os] #loader { display: none; }

#os.booting { animation: boot 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
#os.closing { animation: shutdown 0.25s ease-in both; }

@keyframes boot {
  0% { clip-path: inset(49.7% 50% 49.7% 50%); filter: brightness(5); }
  35% { clip-path: inset(49.7% 0 49.7% 0); filter: brightness(5); }
  100% { clip-path: inset(0); filter: brightness(1); }
}

@keyframes shutdown {
  to { opacity: 0; transform: scale(1.04); }
}

.menubar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 0.9rem;
  font: 0.78rem var(--mono);
  background: rgb(7 11 18 / 0.8);
  border-bottom: 1px solid var(--line);
}

.menubar img { border-radius: 50%; }
.menubar #os-app { color: var(--muted); }
.menubar .spacer { flex: 1; }
.menubar time { color: var(--muted); }

.menubar .exit {
  padding: 0.2rem 0.6rem;
  color: var(--cyan);
  text-decoration: none;
  border: 1px solid rgb(56 189 248 / 0.35);
  border-radius: 0.4rem;
}

.menubar .exit:hover { background: rgb(56 189 248 / 0.12); }
[data-mode="fallback"] .menubar .exit { display: none; }

.desktop {
  position: relative;
  min-height: 0;
  overflow: hidden;
}

/* ---------- Dock ---------- */

.dock {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
  padding: 0 0.75rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.dock a {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 0.15rem;
  min-width: 4.4rem;
  padding: 0.45rem 0.4rem 0.5rem;
  color: var(--muted);
  font: 0.66rem var(--mono);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: 0.7rem;
  transition: color 0.15s, background 0.15s, transform 0.15s;
}

.dock svg { width: 1.4rem; height: 1.4rem; }
.dock a:hover { color: var(--text); background: rgb(255 255 255 / 0.06); transform: translateY(-2px); }
.dock a.running::after {
  content: "";
  position: absolute;
  bottom: 0.15rem;
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 50%;
  background: var(--muted);
}
.dock a.active { color: var(--cyan); background: rgb(56 189 248 / 0.1); border-color: rgb(56 189 248 / 0.3); }
.dock a.active::after { background: var(--cyan); }

/* ---------- Windows ---------- */

.window {
  position: absolute;
  display: none;
  flex-direction: column;
  width: min(54rem, calc(100% - 2rem));
  height: min(40rem, calc(100% - 2rem));
  background: var(--window);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  box-shadow: 0 1.5rem 4rem rgb(0 0 0 / 0.55);
  overflow: hidden;
  outline: none;
}

.window.open { display: flex; animation: pop 0.22s ease-out; }
.window.focused { border-color: rgb(56 189 248 / 0.35); }
.window.max { inset: 0 !important; width: auto; height: auto; border-radius: 0; }

@keyframes pop {
  from { opacity: 0; transform: scale(0.97) translateY(0.5rem); }
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: none;
  height: 2.4rem;
  padding: 0 0.85rem;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  cursor: grab;
  user-select: none;
  touch-action: none;
}

.titlebar h2 {
  margin: 0 0 0 0.4rem;
  font: 0.78rem var(--mono);
  color: var(--muted);
}

.titlebar button {
  width: 0.8rem;
  height: 0.8rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.titlebar .close { background: #f87171; }
.titlebar .zoom { background: #34d399; }
.titlebar button:hover { filter: brightness(1.3); }
.titlebar button:focus-visible,
#os a:focus-visible,
#os summary:focus-visible,
#hud a:focus-visible,
#hud summary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

.content {
  flex: 1;
  min-height: 0;
  padding: 1.75rem 2rem 2.25rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: rgb(255 255 255 / 0.2) transparent;
}

/* ---------- Content ---------- */

.content h1 { margin: 0 0 0.6rem; font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.15; letter-spacing: -0.02em; }
.content h3 { margin: 2rem 0 0.75rem; font-size: 1rem; }
.content h4 { margin: 0 0 0.35rem; font-size: 1rem; }
.content p { margin: 0 0 1rem; max-width: 68ch; }
.content a { color: var(--cyan); }
.content ul { margin: 0 0 1rem; padding-left: 1.15rem; }
.content li { margin-bottom: 0.3rem; max-width: 68ch; }

.eyebrow { margin-bottom: 0.4rem !important; color: var(--cyan); font: 0.78rem var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.lede { font-size: 1.15rem; color: #c8d3df; }
.muted, .meta { color: var(--muted); }
.meta { font-size: 0.88rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.stats > * {
  display: grid;
  padding: 0.9rem 1rem;
  color: inherit !important;
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.7rem;
}

.stats strong { font: 600 1.6rem var(--mono); color: var(--text); }
.stats span { color: var(--muted); font-size: 0.85rem; }
.stats a:hover { border-color: rgb(56 189 248 / 0.4); }

.cards { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); }
.cards.three { grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); }

.card {
  --accent: var(--muted);
  display: block;
  padding: 1.1rem 1.2rem;
  color: inherit !important;
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  border-radius: 0.7rem;
}

.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card p { color: #b9c5d2; font-size: 0.93rem; }
a.card:hover { background: var(--panel-2); }

.violet { --accent: var(--violet); }
.emerald { --accent: var(--emerald); }
.amber { --accent: var(--amber); }
.blue { --accent: var(--blue); }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0 !important; list-style: none; }
.chips li {
  margin: 0;
  padding: 0.18rem 0.6rem;
  font: 0.76rem var(--mono);
  color: #c8d3df;
  background: rgb(255 255 255 / 0.05);
  border: 1px solid var(--line);
  border-radius: 99rem;
}

.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.75rem !important; }

.button {
  padding: 0.55rem 1rem;
  color: var(--text) !important;
  font-size: 0.92rem;
  text-decoration: none;
  background: rgb(255 255 255 / 0.06);
  border: 1px solid var(--line);
  border-radius: 0.55rem;
}

.button:hover { background: rgb(255 255 255 / 0.11); }
.button.primary { color: #04121d !important; font-weight: 600; background: var(--cyan); border-color: var(--cyan); }
.button.primary:hover { background: #7dd3fc; }

/* Experience */

.timeline { margin: 1.25rem 0 0; padding: 0; list-style: none; }
.timeline > li { position: relative; margin: 0; padding: 0 0 1.6rem 1.6rem; max-width: none; border-left: 1px solid var(--line); }
.timeline > li:last-child { padding-bottom: 0; }
.timeline > li::before {
  content: "";
  position: absolute;
  left: -0.31rem;
  top: 0.45rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--panel-2);
  border: 1px solid var(--muted);
}
.timeline > li.current::before { background: var(--emerald); border-color: var(--emerald); box-shadow: 0 0 0 4px rgb(52 211 153 / 0.18); }
.timeline h3 { margin: 0; font-size: 1.05rem; }
.timeline h3 span { color: var(--cyan); font-weight: 500; }
.timeline h3 span::before { content: "· "; color: var(--muted); }
.timeline .meta { margin-bottom: 0.5rem; font-family: var(--mono); font-size: 0.78rem; }
.timeline ul { color: #b9c5d2; font-size: 0.94rem; list-style: disc; }
.content li::marker { color: var(--muted); }

/* Projects */

.files { display: grid; gap: 0.5rem; margin-top: 1rem; }
.project { background: var(--panel); border: 1px solid var(--line); border-radius: 0.7rem; }
.project[open] { border-color: rgb(56 189 248 / 0.3); }
.project summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.75rem;
  padding: 0.8rem 1rem;
  cursor: pointer;
  list-style: none;
}
.project summary::-webkit-details-marker { display: none; }
.project summary::before { content: "▸"; color: var(--muted); font-family: var(--mono); }
.project[open] summary::before { content: "▾"; color: var(--cyan); }
.project .name { font-weight: 600; }
.project .when { margin-left: auto; color: var(--muted); font: 0.76rem var(--mono); }
.project .body { padding: 0 1rem 1rem 2.15rem; color: #b9c5d2; font-size: 0.94rem; }

.tag {
  padding: 0.1rem 0.5rem;
  font: 0.68rem var(--mono);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.9rem 0 0 !important; }
.links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  color: var(--text);
  font-size: 0.85rem;
  text-decoration: none;
  background: rgb(255 255 255 / 0.05);
  border: 1px solid var(--line);
  border-radius: 0.45rem;
}
.links a:hover { border-color: rgb(56 189 248 / 0.45); }
.links svg { width: 0.85rem; height: 0.85rem; }
.links .video { color: #04121d; font-weight: 600; background: var(--cyan); border-color: var(--cyan); }

.player { margin-top: 0.9rem; aspect-ratio: 16 / 9; width: 100%; border: 0; border-radius: 0.5rem; background: #000; }

/* Stack */

.stack { display: grid; gap: 0.75rem; margin: 1.25rem 0 0; }
.stack > div {
  --accent: var(--muted);
  padding: 0.9rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: 0.6rem;
}
.stack dt { margin-bottom: 0.55rem; color: var(--accent); font: 0.78rem var(--mono); letter-spacing: 0.04em; text-transform: uppercase; }
.stack dd { margin: 0; }
.stack .chips { margin: 0; }

/* Contact */

.contacts { display: grid; gap: 0.5rem; margin-top: 1.25rem !important; padding: 0 !important; list-style: none; }
.contacts li { margin: 0; max-width: none; }
.contacts a {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.25rem 1rem;
  padding: 0.85rem 1.1rem;
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
}
.contacts a:hover { border-color: rgb(56 189 248 / 0.45); background: var(--panel-2); }
.contacts span { color: var(--muted); font: 0.8rem var(--mono); }
.contacts strong { color: var(--text); font-weight: 500; overflow-wrap: anywhere; }

/* ---------- Small screens: one window at a time, full size ---------- */

@media (max-width: 820px) {
  :root { --dock: 3.6rem; }
  .window { inset: 0 !important; width: auto; height: auto; border-radius: 0; border-width: 0 0 1px; }
  .titlebar { cursor: default; }
  .titlebar .zoom { display: none; }
  .content { padding: 1.25rem 1.1rem 2rem; }
  .dock { justify-content: flex-start; gap: 0.15rem; }
  .dock a { min-width: 3.9rem; padding: 0.35rem 0.25rem 0.45rem; }
  .menubar time { display: none; }
  .project summary { display: grid; grid-template-columns: 1rem 1fr; }
  .project summary > * { grid-column: 2; justify-self: start; margin-left: 0; }
  .project .body { padding-left: 1rem; }
}

/* ---------- Without JavaScript: a plain scrolling page ---------- */

.no-js body { overflow: auto; height: auto; }
.no-js #room, .no-js #loader, .no-js #hud, .no-js #backdrop, .no-js .dock, .no-js .menubar .exit, .no-js .titlebar button { display: none; }
.no-js #os { position: static; display: block; }
.no-js .desktop { overflow: visible; }
.no-js .window { position: static; display: flex; width: auto; height: auto; max-width: 54rem; margin: 1rem auto; }
.no-js .content { overflow: visible; }

@media (prefers-reduced-motion: reduce) {
  #os, #os *, #room { animation: none !important; transition: none !important; }
}