/* ============================================================
   style.css — Colin Rosenow personal site
   Pure HTML + CSS. No JavaScript, no dependencies.

   The :root token layer below is the "framework". Style with
   tokens (var(--...)), never hardcoded values. Conventions and
   the canonical page skeleton live in CLAUDE.md.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Color */
  --color-bg:            #ffffff;
  --color-fg:            #1a1a1a;
  --color-muted:         #6b6b6b;
  --color-primary:       #512888;
  --color-primary-hover: #3a1c63;
  --color-border:        #e6e6e6;

  /* Type — monospace only (CLI-core) */
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono",
               "Source Code Pro", Menlo, Consolas, "Liberation Mono", monospace;
  --text-sm:   0.85rem;
  --text-base: 1rem;
  --text-lg:   1.25rem;
  --text-2xl:  2.4rem;
  /* Fluid size for the 69-col home banner: fills the viewport minus the
     content padding (÷43 ≈ 69 cols × 0.62em char advance), capped so it
     also fits inside the 72ch measure minus that padding. */
  --text-ascii: min(0.92rem, calc((100vw - 2 * var(--space-4)) / 43));
  --leading:       1.65;
  --leading-tight: 1.4;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;

  /* Layout */
  --measure: 72ch;

  color-scheme: light;
}

/* ---------- Dark mode ----------
   Automatic via prefers-color-scheme; the header's #theme-flip checkbox
   flips whichever mode the OS chose (non-persistent by design — resets on
   every page load; persistence would need JS). The palette appears in two
   blocks below + the :root light default: keep all of them in sync. */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-bg:            #17131d;
    --color-fg:            #eae6f0;
    --color-muted:         #9a93a6;
    --color-primary:       #a58ad6;
    --color-primary-hover: #c3aef0;
    --color-border:        #2d2637;
  }
  /* toggle flips dark-OS users back to light */
  :root:has(#theme-flip:checked) {
    color-scheme: light;
    --color-bg:            #ffffff;
    --color-fg:            #1a1a1a;
    --color-muted:         #6b6b6b;
    --color-primary:       #512888;
    --color-primary-hover: #3a1c63;
    --color-border:        #e6e6e6;
  }
}
@media (prefers-color-scheme: light), (prefers-color-scheme: no-preference) {
  /* toggle flips light-OS users to dark */
  :root:has(#theme-flip:checked) {
    color-scheme: dark;
    --color-bg:            #17131d;
    --color-fg:            #eae6f0;
    --color-muted:         #9a93a6;
    --color-primary:       #a58ad6;
    --color-primary-hover: #c3aef0;
    --color-border:        #2d2637;
  }
}

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: var(--leading);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover,
a:focus-visible {
  color: var(--color-primary-hover);
  border-bottom-color: currentColor;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Layout primitives ---------- */
.site-header,
.content {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* ---------- Header / nav ---------- */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3) var(--space-4);
  padding-top: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.brand {
  color: var(--color-primary);
  font-weight: 700;
}
.brand:hover { border-bottom-color: transparent; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.nav a { color: var(--color-fg); }
.nav a::before {
  content: "./";
  color: var(--color-muted);
}
.nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: currentColor;
}

/* Theme flip — pure-CSS toggle (hidden checkbox + :has(), see token layer) */
.theme-flip {
  margin-left: auto;
  color: var(--color-muted);
  cursor: pointer;
}
.theme-flip:hover span { color: var(--color-primary); }
.theme-flip input:focus-visible + span {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Content ---------- */
.content {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}
.content h1 {
  font-size: var(--text-2xl);
  line-height: 1.15;
  margin: 0 0 var(--space-4);
}
.content h2 {
  font-size: var(--text-lg);
  margin: var(--space-6) 0 var(--space-3);
}
.content p { margin: 0 0 var(--space-4); }
.lede {
  color: var(--color-muted);
  font-size: var(--text-base);
  line-height: var(--leading-tight);
}
.muted { color: var(--color-muted); }

/* Command-prompt heading: renders a purple "$ " before the text */
.prompt::before {
  content: "$ ";
  color: var(--color-primary);
}

/* ASCII-art hero banner (home). The real <h1> is .visually-hidden for a11y;
   the art itself is aria-hidden. */
.ascii-name {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-ascii);
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  overflow-x: auto;
}

/* Screen-reader-only text */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Blinking block cursor — sits after the home "$ ls" prompt */
.cursor::after {
  content: "";
  display: inline-block;
  width: 0.55ch;
  height: 1em;
  margin-left: 0.15ch;
  background: var(--color-primary);
  vertical-align: -0.1em;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Directory-style listing — each entry is a bordered, full-row click target
   (same thin-border pattern as the skill chips) */
.dir {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.dir a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
}
.dir a:hover,
.dir a:focus-visible {
  color: var(--color-muted); /* description stays muted; the border signals hover */
  border-color: var(--color-primary);
}
.dir-name { color: var(--color-primary); }
.dir a:hover .dir-name,
.dir a:focus-visible .dir-name { color: var(--color-primary-hover); }

/* CLI boot splash (home) — hexagon-sun mark beside version/plan/cwd lines */
.boot {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0 0 var(--space-4);
}
.boot-art {
  color: var(--color-primary); /* inline SVG strokes with currentColor */
  width: var(--space-7);
  height: var(--space-7);
  flex-shrink: 0;
}
p.boot-text {
  margin: 0;
  color: var(--color-muted);
}
.boot-name {
  color: var(--color-primary);
  font-weight: 700;
}

/* ---------- CV ---------- */
.cv-section { margin-top: var(--space-7); }
.cv-section > h2 { margin-bottom: var(--space-5); }

/* Top-level entries (companies / standalone roles / schools) get dividers */
.cv-entry + .cv-entry {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.org-name { font-size: var(--text-lg); margin: 0; }
p.org-meta { margin: var(--space-1) 0 var(--space-4); font-size: var(--text-sm); }

/* A single position. Inside a multi-role .org it gets a timeline rail. */
.role { margin-bottom: var(--space-5); }
.role:last-child { margin-bottom: 0; }
.org .role {
  margin-left: var(--space-3);
  padding-left: var(--space-4);
  border-left: 2px solid var(--color-border);
}
.role-title { font-size: var(--text-base); margin: 0; }
p.role-meta { margin: var(--space-1) 0 var(--space-3); font-size: var(--text-sm); }
.role ul { margin: 0 0 var(--space-3); padding-left: var(--space-4); }
.role li { margin-bottom: var(--space-2); }
p.note { font-size: var(--text-sm); }

/* Skills section: labeled groups of chips */
.skill-group { margin-bottom: var(--space-4); }
.skill-group:last-child { margin-bottom: 0; }
p.skill-label { font-size: var(--text-sm); margin: 0 0 var(--space-2); }
.skill-label::before { content: "# "; color: var(--color-primary); }
.skill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.skill-list li {
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
}

/* Education / certs share the entry shell */
p.degree { margin: var(--space-1) 0 0; }

/* ---------- Motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  .cursor::after { animation: none; }
}