/* Retro terminal / man-page styling, matching the retro resume.
   Two themes: "paper" (the printed resume) and "phosphor" (a dark CRT). */

:root,
:root[data-theme="paper"] {
  --bg: #fbfaf7;
  --panel: #f2f0ea;
  --ink: #111111;
  --dim: #6f6f6f;
  --green: #1a7f37;
  --amber: #b35900;
  --red: #b42318;
  --line: #d5d2c8;
  --hot: #b35900;
  --glow: none;
  color-scheme: light;
}

:root[data-theme="phosphor"] {
  --bg: #0b0e0b;
  --panel: #111611;
  --ink: #c9d6c3;
  --dim: #6d7d69;
  --green: #4ade80;
  --amber: #f5a524;
  --red: #f87171;
  --line: #243024;
  --hot: #f5a524;
  --glow: 0 0 6px rgba(74, 222, 128, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 "IBM Plex Mono", "Courier New", ui-monospace, monospace;
  -webkit-text-size-adjust: 100%;
}

.masthead, main, .footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 16px;
}

a { color: var(--green); text-underline-offset: 3px; }
a:hover { background: var(--green); color: var(--bg); text-decoration: none; }
:focus-visible { outline: 2px dashed var(--amber); outline-offset: 2px; }

.dim { color: var(--dim); }
.small { font-size: 0.86em; }
.warn { color: var(--red); }
strong { font-weight: 700; }
em { font-style: normal; color: var(--amber); }
kbd {
  font: inherit;
  font-size: 0.85em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  padding: 0 4px;
  border-radius: 3px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 4px 8px; z-index: 10; }

/* ---------------------------------------------------------------- masthead */
.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 4px 2ch;
  padding-top: 20px;
}
.brand { color: var(--dim); text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 1.5ch; flex: 1; }
.site-nav a { text-decoration: none; padding: 0 2px; }
.site-nav a::before { content: "./"; color: var(--dim); }
.site-nav a[aria-current="page"] { background: var(--green); color: var(--bg); }
.site-nav a[aria-current="page"]::before { color: inherit; }
.tools { white-space: nowrap; }
.lede { margin-top: 24px; }

.box {
  margin: 12px 0 8px;
  font: inherit;
  line-height: 1.35;
  white-space: pre;
  overflow: hidden;
}
.box .name { font-weight: 700; }
.box .tag { color: var(--green); font-weight: 700; text-shadow: var(--glow); }

.cursor {
  color: var(--green);
  text-shadow: var(--glow);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.links, .toc { margin: 4px 0; }
.toc a { margin-right: 1.2ch; }
.toc a::before { content: "./"; color: var(--dim); }

/* ---------------------------------------------------------------- sections */
section { padding-top: 8px; scroll-margin-top: 12px; }

.h {
  display: flex;
  gap: 1ch;
  margin: 32px 0 12px;
  font-size: 1em;
  font-weight: 700;
  white-space: nowrap;
}
.h::before { content: ">>"; color: var(--green); text-shadow: var(--glow); }
.h::after {
  content: "=========================================================================================================================================";
  flex: 1;
  min-width: 0;
  overflow: hidden;
  color: var(--dim);
  font-weight: 400;
}

p { margin: 0 0 12px; }

.stats, .skills { margin: 0; }
.stats div, .skills div {
  display: grid;
  grid-template-columns: 8ch 1fr;
  gap: 2ch;
  padding: 4px 0;
}
.skills div { grid-template-columns: 13ch 1fr; }
.stats dt {
  color: var(--green);
  font-weight: 700;
  font-size: 1.25em;
  line-height: 1.3;
  text-shadow: var(--glow);
}
.skills dt { color: var(--green); font-weight: 700; }
.skills dt::after { content: ":"; }
.stats dd, .skills dd { margin: 0; }

.entry { margin: 0 0 24px; }
.entry > header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0 2ch;
}
.role { color: var(--amber); font-weight: 700; margin: 0 0 6px; }
.note { color: var(--dim); }

.bullets { list-style: none; margin: 0; padding: 0; }
.bullets li { padding-left: 2ch; text-indent: -2ch; margin-bottom: 4px; }
.bullets li::before { content: "- "; color: var(--green); font-weight: 700; }

/* ---------------------------------------------------------------- widgets */
.btn {
  font: inherit;
  color: var(--green);
  background: none;
  border: 0;
  padding: 2px 4px;
  cursor: pointer;
}
.btn:hover:not(:disabled) { background: var(--green); color: var(--bg); }
.btn:disabled { color: var(--dim); cursor: default; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 10px 12px;
  margin: 8px 0;
  font: inherit;
  white-space: pre-wrap;
}

.input {
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 4px 8px;
  min-width: 0;
  flex: 1;
}

.demo { margin: 16px 0; }
.demo-title {
  font-size: 1em;
  margin: 0 0 8px;
  color: var(--dim);
  font-weight: 400;
}
.demo-title::before { content: "$ ./"; color: var(--green); }
.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* ---------------------------------------------------------------- lab */
.lab {
  display: grid;
  grid-template-columns: minmax(0, 420px) 1fr;
  gap: 24px;
  align-items: start;
}
.lab-graph { margin: 0; }
.lab-graph svg { width: 100%; height: auto; display: block; }
.controls { display: flex; flex-wrap: wrap; gap: 4px; }
.log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 190px;
  overflow-y: auto;
  font-size: 0.86em;
}
.log li { padding: 1px 0; }
.log li.done { color: var(--green); font-weight: 700; }

.edge { fill: none; stroke: var(--ink); stroke-linecap: round; opacity: 0.75; transition: stroke-width 0.4s, opacity 0.4s; }
.edge.gone { stroke-dasharray: 2 5; stroke-width: 1 !important; opacity: 0.3; }
.edge.hot { stroke: var(--hot); opacity: 1; }
.edge-hit { fill: none; stroke: transparent; stroke-width: 12; cursor: help; }
.node circle { fill: var(--bg); stroke: var(--green); stroke-width: 2; }
.node text { fill: var(--ink); font: 700 15px "IBM Plex Mono", monospace; text-anchor: middle; dominant-baseline: central; }
.node .net { font-size: 11px; font-weight: 400; fill: var(--dim); }
.node .net.start { text-anchor: start; }
.node .net.end { text-anchor: end; }
.arrowhead { fill: var(--ink); }
.arrowhead.hot { fill: var(--hot); }

pre.math {
  font: inherit;
  font-size: 0.9em;
  white-space: pre-wrap;
  margin: 0 0 12px;
  padding: 10px 12px;
  border-left: 3px solid var(--green);
  background: var(--panel);
}

/* ---------------------------------------------------------------- home: explore cards */
.xcards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}
.xcard {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
}
.xcard:hover { background: var(--panel); color: var(--ink); border-color: var(--green); }
.xcard-title { color: var(--green); font-weight: 700; text-shadow: var(--glow); }
.xcard-body { flex: 1; }
.xcard-cta { color: var(--green); }
.xcard:hover .xcard-cta { background: var(--green); color: var(--bg); align-self: flex-start; }

/* ---------------------------------------------------------------- bookshelf */
.shelf {
  list-style: none;
  margin: 0 0 8px;
  padding: 0 0 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
  gap: 20px 16px;
  border-bottom: 4px double var(--line);
}
.shelf li { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.book {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transition: transform 0.15s;
}
.book img, .cover-ph {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: 3px 3px 0 var(--line);
}
.book:hover, .book:focus-visible, .book[aria-describedby] { transform: translateY(-4px); }
.book:hover img, .book:hover .cover-ph,
.book[aria-describedby] img, .book[aria-describedby] .cover-ph { border-color: var(--green); box-shadow: 3px 3px 0 var(--green); }
.cover-ph {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 10px 8px;
  background: var(--panel);
  border-top: 6px solid var(--green);
  text-align: center;
  font-size: 0.78em;
  line-height: 1.3;
}
.ph-title { font-weight: 700; color: var(--ink); }
.ph-author { color: var(--dim); }
.book-cap {
  font-size: 0.75em;
  line-height: 1.3;
  color: var(--dim);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-pop {
  position: absolute;
  z-index: 40;
  width: 360px;
  max-width: calc(100vw - 16px);
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--green);
  box-shadow: 4px 4px 0 var(--green);
  font-size: 0.86em;
  pointer-events: none;
}
.book-pop[hidden] { display: none; }
.pop-title { font-weight: 700; margin: 0; }
.pop-author { color: var(--dim); margin: 0 0 8px; }
.pop-take { color: var(--amber); font-weight: 700; margin: 0 0 8px; }
.pop-take::before { content: "> "; color: var(--green); }
.pop-quote { margin: 0 0 8px; padding-left: 10px; border-left: 2px solid var(--line); font-style: italic; }
.book-pop .bullets li { margin-bottom: 2px; }

/* ---------------------------------------------------------------- flashcards */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 12px;
  min-height: 150px;
}
.card .def { color: var(--dim); font-size: 0.9em; }
.card .cloze { font-size: 1.1em; margin: 8px 0; }
.card .blank { color: var(--amber); font-weight: 700; }
.card .ok { color: var(--green); font-weight: 700; }
.card .bad { color: var(--red); font-weight: 700; }
.card-form { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }

.pipeline {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  padding: 0;
  margin: 6px 0;
  font-size: 0.86em;
}
.pipeline li { color: var(--dim); transition: color 0.3s; }
.pipeline li + li::before { content: " ──▸ "; color: var(--line); }
.pipeline li.on { color: var(--amber); font-weight: 700; }

/* ---------------------------------------------------------------- spotify */
.spotify {
  position: relative;
  border: 1px dashed var(--line);
  padding: 12px;
}
.spotify:focus-visible { outline-style: solid; }
.np { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 2ch; }
.np-track { font-weight: 700; flex: 1; min-width: 20ch; }
.keys { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px; }
.key {
  font: inherit;
  font-size: 0.86em;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 4px;
  padding: 3px 8px;
  cursor: pointer;
}
.key b { color: var(--green); }
.key:hover, .key.pressed { border-color: var(--green); }
.key.pressed { transform: translateY(2px); border-bottom-width: 1px; }
.sp-lists {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 6px 16px;
  font-size: 0.86em;
}
.sp-list .title { color: var(--amber); font-weight: 700; }
.sp-list ol { margin: 0; padding-left: 3ch; color: var(--dim); }
.sp-list li.fresh { color: var(--green); }
.toast {
  position: absolute;
  right: 12px;
  top: 12px;
  max-width: 280px;
  background: var(--ink);
  color: var(--bg);
  padding: 6px 10px;
  font-size: 0.86em;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- wcs practice */
.wcs-clips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.wcs-clip { margin: 0; transition: opacity 0.3s; }
.wcs-clip video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 3px 3px 0 var(--line);
}
.wcs-clip figcaption { margin-top: 6px; color: var(--amber); font-weight: 700; }
.wcs-clip figcaption::before { content: "> "; color: var(--green); }
.wcs-clip.current video { border-color: var(--green); box-shadow: 3px 3px 0 var(--green); }
.wcs-clip.dimmed { opacity: 0.35; }
.wcs-controls { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 2ch; margin-top: 10px; }

/* ---------------------------------------------------------------- terminal (pop-down console) */
.term-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(2px);
}
.term-overlay[hidden] { display: none; }
.term {
  white-space: normal;
  max-width: 920px;
  margin: 0 auto;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.term-head { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.86em; margin-bottom: 6px; }
.term-out { max-height: 260px; overflow-y: auto; white-space: pre-wrap; }
.term-out .cmd { color: var(--dim); }
.term-out .err { color: var(--red); }
.term-line { display: flex; gap: 1ch; align-items: baseline; }
.prompt { color: var(--green); font-weight: 700; white-space: nowrap; text-shadow: var(--glow); }
.term-in {
  flex: 1;
  min-width: 0;
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: none;
  caret-color: var(--green);
}
.term:focus-within { border-color: var(--green); }

.footer { padding: 32px 16px 40px; font-size: 0.86em; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 760px) {
  body { font-size: 14px; }
  .box { font-size: 12px; }
  .lab, .demo-grid, .xcards { grid-template-columns: 1fr; }
  .shelf { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 16px 12px; }
  .lab-graph { max-width: 420px; }
  .stats div { grid-template-columns: 7ch 1fr; gap: 1.5ch; }
  .skills div { grid-template-columns: 1fr; gap: 0; }
  .prompt { font-size: 0.86em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .edge, .toast, .pipeline li, .book, .wcs-clip { transition: none; }
}