/* ------------------------------------------------------------------
   Konstantinos Pechlivanis — personal academic site
   Palette derived from A320 ECAM colour semantics:
   magenta = managed target, blue = armed, green = normal, amber = caution
   ------------------------------------------------------------------ */

:root {
  --paper:    #F6F7F9;
  --card:     #FFFFFF;
  --ink:      #141E28;
  --ink-2:    #4E5B69;
  --ink-3:    #838E9B;
  --rule:     #DBE0E6;
  --rule-2:   #EDF0F3;

  --managed:  #A6237B;
  --armed:    #1B6FA8;
  --normal:   #1B7A57;
  --caution:  #8A5A00;

  --sans: "Barlow Condensed", "Arial Narrow", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --nav-w: 15rem;
  --measure: 40rem;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:    #0E141A;
    --card:     #151D25;
    --ink:      #E8ECF0;
    --ink-2:    #AAB5C1;
    --ink-3:    #7E8B99;
    --rule:     #273139;
    --rule-2:   #1C252D;

    --managed:  #EF7FC8;
    --armed:    #6FB6E8;
    --normal:   #4FC38E;
    --caution:  #E0A83C;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-feature-settings: "onum" 1;
}

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

.shell { display: flex; align-items: flex-start; }

.nav {
  width: var(--nav-w);
  flex: 0 0 var(--nav-w);
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 2.5rem 1.5rem 2rem;
  border-right: 1px solid var(--rule);
  background: var(--card);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.main {
  flex: 1 1 auto;
  min-width: 0;
  padding: 3.5rem 2.5rem 6rem;
}

.wrap { max-width: 52rem; }

/* ---------- Nav ---------- */

.nav__mark {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1.375rem;
  line-height: 1.1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 0 0 0.4rem;
}

.nav__mark a { color: var(--ink); text-decoration: none; }

.nav__post {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--managed);
  text-transform: uppercase;
}

.nav__list { list-style: none; margin: 0; padding: 0; }

.nav__list li { margin: 0 0 0.15rem; }

.nav__list a {
  display: block;
  font-family: var(--sans);
  font-size: 1.0625rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
  padding: 0.3rem 0.5rem 0.3rem 0.6rem;
  border-left: 2px solid transparent;
}

.nav__list a:hover { color: var(--ink); background: var(--rule-2); }

.nav__list a[aria-current="page"] {
  color: var(--ink);
  border-left-color: var(--managed);
  background: var(--rule-2);
}

.nav__foot {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.6875rem;
  line-height: 1.7;
  color: var(--ink-3);
}

.nav__foot a { color: var(--ink-2); text-decoration: none; border-bottom: 1px solid var(--rule); }
.nav__foot a:hover { color: var(--managed); border-bottom-color: var(--managed); }

/* ---------- Typography ---------- */

h1 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  line-height: 1.02;
  letter-spacing: 0.005em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
}

h2 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.625rem;
  line-height: 1.15;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 3rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 2rem 0 0.5rem;
}

p { margin: 0 0 1.1rem; max-width: var(--measure); }

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

.lede {
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--ink-2);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.6rem;
}

/* ---------- Standing block (home) ---------- */

.standing {
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 0;
  margin: 0 0 2.5rem;
}

.standing dl {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.4rem 1.5rem;
  margin: 0;
  max-width: var(--measure);
}

.standing dt {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 0.25rem;
}

.standing dd { margin: 0; font-size: 1rem; }

/* ---------- Section jump links (publications) ---------- */

.jump {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 2;
  color: var(--ink-3);
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
}

.jump a { color: var(--ink-2); text-decoration: none; border-bottom: 1px solid var(--rule); }
.jump a:hover { color: var(--managed); border-bottom-color: var(--managed); }

/* ---------- Status tokens ---------- */

.tok {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  vertical-align: 0.12em;
  white-space: nowrap;
}

.tok--review { color: var(--caution); }
.tok--book   { color: var(--armed); }
.tok--live   { color: var(--normal); }
.tok--dev    { color: var(--caution); }

/* ---------- Entry list (publications, books, tools) ---------- */

.entries { list-style: none; margin: 0; padding: 0; }

.entry {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule);
}

.entry:first-child { border-top: 1px solid var(--rule); }

.entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.3rem;
}

.entry__yr {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  min-width: 3.5rem;
}

.entry__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.35;
  margin: 0;
  flex: 1 1 20rem;
}

.entry__meta {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-2);
  max-width: var(--measure);
}

.entry__doi {
  font-family: var(--mono);
  font-size: 0.75rem;
  word-break: break-all;
}

/* ---------- Screenshot figures (projects) ---------- */

.shot { margin: 1rem 0 0.25rem; }

.shot a {
  display: block;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--card);
  line-height: 0;
}

.shot a:hover { border-color: var(--managed); }

.shot img { display: block; width: 100%; height: auto; }

.shot figcaption {
  font-family: var(--mono);
  font-size: 0.6875rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  margin-top: 0.5rem;
}

/* ---------- Callout ---------- */

.note {
  border-left: 3px solid var(--armed);
  background: var(--card);
  padding: 0.9rem 1.1rem;
  margin: 1.75rem 0;
  font-size: 0.9375rem;
  color: var(--ink-2);
  max-width: var(--measure);
}

.note p:last-child { margin-bottom: 0; }

/* ---------- Strand cards (research) ---------- */

.strands {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 1.5rem 0;
}

.strand { background: var(--card); padding: 1.25rem 1.35rem; }

.strand h3 { margin: 0 0 0.4rem; font-size: 1.0625rem; }

.strand p { margin: 0; font-size: 0.9375rem; color: var(--ink-2); }

/* ---------- Footer ---------- */

.foot {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}

/* ---------- Skip link + focus ---------- */

.skip {
  position: absolute;
  left: -9999px;
  font-family: var(--mono);
  font-size: 0.75rem;
}

.skip:focus {
  left: 1rem; top: 1rem;
  background: var(--ink); color: var(--paper);
  padding: 0.5rem 0.75rem; z-index: 10;
}

:focus-visible { outline: 2px solid var(--managed); outline-offset: 2px; }

/* ---------- Responsive ---------- */

@media (max-width: 56rem) {
  .shell { display: block; }

  .nav {
    width: auto; flex: none;
    position: static; height: auto;
    padding: 1.75rem 1.25rem 1.25rem;
    border-right: 0; border-bottom: 1px solid var(--rule);
  }

  .nav__list { display: flex; flex-wrap: wrap; gap: 0.1rem 0.25rem; }

  .nav__list a {
    border-left: 0; border-bottom: 2px solid transparent;
    padding: 0.25rem 0.5rem;
  }

  .nav__list a[aria-current="page"] {
    border-left: 0; border-bottom-color: var(--managed);
  }

  .nav__foot { margin-top: 1.25rem; }

  .main { padding: 2rem 1.25rem 4rem; }

  .strands { grid-template-columns: 1fr; }

  .standing dl { grid-template-columns: 1fr; gap: 0.1rem; }
  .standing dt { padding-top: 0.6rem; }
}

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