/* ==========================================================================
   Graham Booton — portfolio
   Single stylesheet, shared by index.html, resume.html, and lebenslauf.html.
   You should rarely need to touch this file to update content; edit the
   HTML instead. Colors and spacing live in :root below.
   ========================================================================== */

:root {
  --bg:        #fbfaf7;
  --text:      #1b1b1a;
  --muted:     #6d6a63;
  --rule:      #e2ded4;
  --accent:    #9c3d24;   /* rust — used only for links & small accents */
  --accent-2:  #7a2f1c;
  --maxw:      44rem;
  --gap:       2.75rem;   /* vertical rhythm between sections */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
          Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:     #16161a;
    --text:   #e8e6e0;
    --muted:  #9c988e;
    --rule:   #2e2e34;
    --accent: #e0a08c;
    --accent-2:#f0c3b3;
  }
}

/* ---------- base ---------------------------------------------------------- */
* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}
a:hover { color: var(--accent-2); }

h1, h2, h3 { line-height: 1.25; font-weight: 650; }
h1 { font-size: 1.9rem; margin: 0 0 .35rem; letter-spacing: -0.01em; }
h2 {
  font-size: 1.15rem;
  margin: 0 0 1.1rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--rule);
  letter-spacing: .02em;
  text-transform: uppercase;
}
h3 { font-size: 1.02rem; margin: 0 0 .15rem; }

p { margin: 0 0 1rem; }
ul { margin: 0 0 1rem; padding-left: 1.15rem; }
li { margin: 0 0 .4rem; }

.muted { color: var(--muted); }
.small { font-size: .92rem; }

/* ---------- header / nav ----------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .4rem 3rem;
  padding-top: .8rem;
  padding-bottom: .8rem;
  padding-right: 2.6rem; /* keep text clear of the corner mark */
}
.site-header .name {
  font-weight: 650;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .1rem 1rem;
  font-size: .92rem;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
}
.site-nav a:hover { color: var(--accent); }

/* favicon mark, pinned to the top-right corner of the header. Fixed dark
   backing (not a theme variable) so the white logo stays visible whether
   the page is in light or dark mode. */
.site-mark {
  position: absolute;
  top: .6rem;
  right: 0;
  width: 28px;
  height: 28px;
  padding: 4px;
  box-sizing: border-box;
  background: #1c1b1a;
  border-radius: 6px;
}

/* ---------- layout ------------------------------------------------------ */
main { padding: var(--gap) 0 1rem; }
section { margin-bottom: var(--gap); scroll-margin-top: 4.5rem; }

.lede { font-size: 1.15rem; }

.tagline { color: var(--muted); margin: 0 0 1.4rem; font-size: 1.05rem; }

/* shared separator between entries, whether <div> or <details> */
.entry { border-top: 1px solid var(--rule); }
.entry:first-of-type { border-top: 0; }

/* two-column rows: date on the left, content on the right (Education, FSAE) */
div.entry {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: .25rem 1.5rem;
  padding: 1rem 0;
}
div.entry:first-of-type { padding-top: .25rem; }
div.entry .when {
  color: var(--muted);
  font-size: .9rem;
  padding-top: .15rem;
}
div.entry .what > :last-child { margin-bottom: 0; }
div.entry .where { color: var(--muted); font-size: .95rem; margin: 0 0 .5rem; }
div.entry ul { margin-bottom: 0; }

/* collapsible rows, opened via the + icon (Professional Experience, Leadership) */
details.entry { padding: .2rem 0; }
details.entry:first-of-type { padding-top: 0; }
details.entry summary {
  display: grid;
  grid-template-columns: 1.4rem 8.5rem 1fr;
  grid-template-areas: "icon when title";
  align-items: start;
  gap: .2rem 1.5rem;
  padding: .8rem 0;
  cursor: pointer;
  list-style: none;
}
details.entry summary::-webkit-details-marker { display: none; }
details.entry summary::marker { content: ""; }
details.entry summary::before {
  grid-area: icon;
  content: "+";
  color: var(--accent);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.5;
}
details.entry[open] summary::before { content: "\2212"; }
details.entry summary .when { grid-area: when; color: var(--muted); font-size: .9rem; padding-top: .2rem; }
details.entry summary .title { grid-area: title; }
details.entry summary .title h3 { margin: 0 0 .15rem; }
details.entry summary .where { color: var(--muted); font-size: .95rem; margin: 0; }
details.entry summary:hover .title h3 { color: var(--accent); }
details.entry .details-body { padding: 0 0 1rem calc(1.4rem + 1.5rem); }
details.entry .details-body ul { margin-bottom: 0; }

/* compact definition-style list (contact, etc.) */
.stack { list-style: none; padding: 0; margin: 0 0 1rem; }
.stack li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .25rem 1rem;
  padding: .5rem 0;
  border-top: 1px solid var(--rule);
}
.stack li:first-child { border-top: 0; }
.stack .when { color: var(--muted); font-size: .9rem; white-space: nowrap; }

/* skills tag chips */
.tags { list-style: none; padding: 0; margin: 0 0 1.2rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.tags li {
  margin: 0;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: .35rem .8rem;
  font-size: .85rem;
  color: var(--text);
}
.skill-group { margin-bottom: 1rem; }
.skill-group h3 { font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; margin-bottom: .6rem; }

/* buttons */
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }
.btn {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  background: none;
  padding: .5rem .9rem;
  border-radius: 2px;
  text-decoration: none;
  font-size: .95rem;
  font-family: inherit;
  cursor: pointer;
}
.btn:hover { background: var(--accent); color: var(--bg); }

/* ---------- footer ------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: .95rem;
}
.site-footer h2 { color: var(--text); }
.site-footer a { color: var(--accent); }

/* ---------- résumé / Lebenslauf preview pages --------------------------- */
.doc-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  margin-bottom: 1.5rem;
}
.doc-toolbar p { margin: 0; color: var(--muted); font-size: .9rem; }

.pdf-frame {
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
  height: 82vh;
  min-height: 32rem;
  margin-bottom: var(--gap);
}
.pdf-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}
.pdf-frame .fallback { padding: 2rem; }

/* ---------- responsive -------------------------------------------------- */
@media (max-width: 34rem) {
  div.entry { grid-template-columns: 1fr; gap: .1rem; }
  div.entry .when { padding-top: 0; order: -1; }
  details.entry summary {
    grid-template-columns: 1.2rem 1fr;
    grid-template-areas:
      "icon title"
      ".    when";
  }
  details.entry .details-body { padding-left: calc(1.2rem + 1rem); }
  .stack li { grid-template-columns: 1fr; }
  h1 { font-size: 1.65rem; }
  .site-mark { width: 24px; height: 24px; }
  .pdf-frame { height: 70vh; }
}

/* ---------- print ------------------------------------- */
@media print {
  .site-header, .site-footer, .doc-toolbar { display: none; }
  a { color: inherit; text-decoration: none; }
  body { font-size: 11pt; }
}