/* =====================================================================
   Eyüp Kemal Karaoğlu — personal site
   Two-ink technical manual: paper ground, green-black ink, madder red
   as the second ink. Hairline rules, mono margin annotations, crop
   marks at the page corners.
   ===================================================================== */

/* ---------- tokens ---------------------------------------------------- */
:root {
  --paper:    #E6E7E2;
  --ink:      #1A1E1B;
  --ink-2:    #5C625C;
  --ink-3:    #878D86;
  --rule:     #C4C7C1;
  --rule-2:   #D5D7D1;
  --accent:   #96262C;
  --accent-tint: rgba(150, 38, 44, 0.07);

  /* Webfonts load from the <link> in index.html; the rest of each stack is
     the fallback, and is what the design was originally set in. */
  --display: "Archivo Narrow", "Franklin Gothic Medium", "Arial Narrow", "Liberation Sans Narrow", sans-serif;
  --body: "Source Serif 4", Charter, "Bitstream Charter", "Sitka Text", "Iowan Old Style", Georgia, serif;
  --mono: "IBM Plex Mono", "Cascadia Mono", ui-monospace, "SF Mono", "DejaVu Sans Mono", Consolas, monospace;

  --measure: 66ch;
  --rail: 9.5rem;
  --gutter: 2.25rem;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:    #141714;
    --ink:      #E3E5DF;
    --ink-2:    #9CA29A;
    --ink-3:    #6E746D;
    --rule:     #333833;
    --rule-2:   #262B26;
    --accent:   #DE5A5E;
    --accent-tint: rgba(222, 90, 94, 0.10);

    color-scheme: dark;
  }
}

/* The visitor's own choice wins over the OS preference, both directions. */
:root[data-theme="light"] {
  --paper: #E6E7E2;
  --ink: #1A1E1B; --ink-2: #5C625C; --ink-3: #878D86;
  --rule: #C4C7C1; --rule-2: #D5D7D1;
  --accent: #96262C; --accent-tint: rgba(150, 38, 44, 0.07);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --paper: #141714;
  --ink: #E3E5DF; --ink-2: #9CA29A; --ink-3: #6E746D;
  --rule: #333833; --rule-2: #262B26;
  --accent: #DE5A5E; --accent-tint: rgba(222, 90, 94, 0.10);
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, p, dl, dd, figure { margin: 0; }
a { color: inherit; }
img { max-width: 100%; height: auto; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* ---------- page frame + print marks ---------------------------------- */
.sheet {
  position: relative;
  max-width: 74rem;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 4rem) 6rem;
}

.marks { position: absolute; inset: 1.4rem clamp(0.5rem, 3vw, 2.2rem); pointer-events: none; }
.marks span {
  position: absolute;
  width: 22px; height: 22px;
  border: 0 solid var(--accent);
  opacity: 0.55;
}
.marks span:nth-child(1) { top: 0; left: 0; border-top-width: 1px; border-left-width: 1px; }
.marks span:nth-child(2) { top: 0; right: 0; border-top-width: 1px; border-right-width: 1px; }
.marks span:nth-child(3) { bottom: 0; left: 0; border-bottom-width: 1px; border-left-width: 1px; }
.marks span:nth-child(4) { bottom: 0; right: 0; border-bottom-width: 1px; border-right-width: 1px; }
@media (max-width: 700px) { .marks { display: none; } }

/* running head */
.runhead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.6rem 0 0.65rem;
  border-bottom: 1px solid var(--ink);
}
.runhead .reg { display: flex; align-items: center; gap: 0.55rem; }
.runhead svg { display: block; color: var(--accent); }
.runhead-end { display: flex; align-items: center; gap: 1.1rem; }
@media (max-width: 560px) { .runhead-end .loc { display: none; } }

.ink-toggle {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  margin: 0;
  padding: 0.3rem 0.6rem;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-2);
  font: inherit;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background-color 0.18s;
}
.ink-toggle .k { color: var(--ink-3); }
.ink-toggle b { font-weight: 600; color: var(--ink); min-width: 2.9em; text-align: left; }
.ink-toggle:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-tint); }
.ink-toggle:hover b { color: var(--accent); }

/* ---------- hero ------------------------------------------------------ */
.hero { padding: clamp(2.5rem, 7vw, 4.75rem) 0 clamp(2rem, 5vw, 3.25rem); }

.hero h1 {
  font-family: var(--display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.005em;
  line-height: 0.92;
  font-size: clamp(2.9rem, 11.5vw, 8.2rem);
  text-wrap: balance;
}
.hero h1 .soft { color: var(--ink-2); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 4rem);
  align-items: start;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

.lede {
  font-size: clamp(1.06rem, 1.9vw, 1.3rem);
  line-height: 1.55;
  max-width: 46ch;
}
.lede em { font-style: normal; color: var(--accent); }

/* spec block */
.spec { display: grid; gap: 0; align-self: start; border-top: 1px solid var(--ink); }
.spec div {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
}
.spec .k {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--ink-3); padding-top: 0.18em;
}
.spec .v {
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.01em;
  color: var(--ink); font-variant-numeric: tabular-nums;
}

.status { display: inline-flex; align-items: center; gap: 0.45rem; }
.status::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); flex: none;
}

/* ---------- section scaffolding --------------------------------------- */
.sec {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, var(--measure));
  gap: var(--gutter);
  padding: clamp(2.25rem, 5vw, 3.5rem) 0;
  border-top: 1px solid var(--rule);
}
.sec.wide { grid-template-columns: var(--rail) minmax(0, 1fr); }
@media (max-width: 860px) {
  .sec, .sec.wide { grid-template-columns: 1fr; gap: 1.1rem; }
}

.sec > .rail { position: sticky; top: 1.5rem; align-self: start; }
@media (max-width: 860px) { .sec > .rail { position: static; } }

.rail h2 {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 0.4rem;
}
.rail h2::before {
  content: "";
  display: block;
  width: 1.6rem; height: 2px;
  background: var(--accent);
  margin-bottom: 0.65rem;
}
.rail p {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.05em;
  color: var(--ink-3); line-height: 1.5;
}

.body > p { margin-bottom: 1.1rem; }
.body > p:last-child { margin-bottom: 0; }

.note {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

/* ---------- entries --------------------------------------------------- */
.entries { display: grid; gap: 2.6rem; }

.entry h3 {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-weight: 500;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.12;
  margin-bottom: 0.5rem;
  text-wrap: balance;
}
.entry h3 a {
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 0.25s ease, color 0.25s ease;
}
.entry h3 a:hover { color: var(--accent); background-size: 100% 1px; }
.entry h3 a .ext {
  font-family: var(--mono); font-size: 0.55em; color: var(--accent);
  vertical-align: 0.35em; margin-left: 0.4em; letter-spacing: 0.05em;
}

.stack {
  display: flex; flex-wrap: wrap; gap: 0.3rem 0.75rem;
  margin-bottom: 0.95rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--rule-2);
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-3);
}
.stack span { white-space: nowrap; }
.stack span + span::before { content: "·"; margin-right: 0.75rem; color: var(--rule); }

.points { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.points li { position: relative; padding-left: 1.5rem; }
.points li::before {
  content: "";
  position: absolute; left: 0; top: 0.62em;
  width: 0.75rem; height: 1px; background: var(--accent);
}
.points strong { font-weight: 600; }
.points strong::after { content: " —"; color: var(--ink-3); font-weight: 400; }

/* ---------- timeline -------------------------------------------------- */
.tl-scroll { overflow-x: auto; padding-bottom: 0.5rem; }
.tl { min-width: 33rem; }

.tl-axis { position: relative; height: 1.5rem; border-bottom: 1px solid var(--ink); }
.tl-axis b {
  position: absolute; bottom: 0.3rem;
  transform: translateX(-50%);
  font-family: var(--mono); font-size: 0.66rem; font-weight: 400;
  letter-spacing: 0.06em; color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.tl-axis b:first-child { transform: none; }
.tl-axis b:last-child { transform: translateX(-100%); }

.tl-plot { position: relative; padding: 1.15rem 0 0.35rem; }

.tl-grid { position: absolute; inset: 0; pointer-events: none; }
.tl-grid i { position: absolute; top: 0; bottom: 1.6rem; width: 1px; background: var(--rule-2); }

.tl-overlap {
  position: absolute; top: 0; bottom: 1.6rem;
  background: var(--accent-tint);
  border-left: 1px dashed var(--accent);
  border-right: 1px dashed var(--accent);
}

.tl-row { position: relative; margin-bottom: 1.15rem; }
.tl-label {
  display: flex; flex-wrap: wrap; gap: 0.25rem 0.6rem; align-items: baseline;
  margin-bottom: 0.3rem;
}
.tl-label b { font-weight: 600; font-size: 0.95rem; }
.tl-label span {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-3); font-variant-numeric: tabular-nums;
}

.tl-track { position: relative; height: 12px; background: var(--rule-2); }
.tl-bar {
  position: absolute; top: 0; bottom: 0;
  left: var(--s); width: var(--w);
  background: var(--ink);
  transform-origin: left center;
}
.tl-bar.is-open {
  background: repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 10px);
}

.tl-note {
  position: relative;
  margin-top: 0.2rem;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent);
}

/* ---------- skills ---------------------------------------------------- */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1.75rem 2.25rem; }
.skills section { border-top: 1px solid var(--ink); padding-top: 0.7rem; }
.skills h3 {
  margin-bottom: 0.55rem;
  font-family: var(--mono); font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
}
.skills ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.2rem 0.7rem; }
.skills li { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.01em; color: var(--ink-2); }
.skills li::after { content: "/"; margin-left: 0.7rem; color: var(--rule); }
.skills li:last-child::after { content: ""; margin: 0; }

/* ---------- contact --------------------------------------------------- */
.contact-links { display: grid; gap: 0; margin-bottom: 1.5rem; border-top: 1px solid var(--ink); }
.contact-links a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: 0.85rem 0.25rem 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: padding-left 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}
.contact-links a:hover { color: var(--accent); padding-left: 0.6rem; background: var(--accent-tint); }
.contact-links .label {
  font-family: var(--display); text-transform: uppercase;
  letter-spacing: 0.03em; font-size: 1.15rem;
}
.contact-links .val {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.04em;
  color: var(--ink-2); text-align: right; word-break: break-all;
}
.contact-links a:hover .val { color: var(--accent); }

.colophon {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
}

/* ---------- load sequence --------------------------------------------- */
.rise { opacity: 0; transform: translateY(0.7rem); animation: rise 0.7s cubic-bezier(0.22, 0.8, 0.3, 1) forwards; }
.d1 { animation-delay: 0.05s; }
.d2 { animation-delay: 0.16s; }
.d3 { animation-delay: 0.27s; }
@keyframes rise { to { opacity: 1; transform: none; } }

.draw { transform: scaleX(0); animation: draw 0.85s cubic-bezier(0.22, 0.8, 0.3, 1) 0.5s forwards; }
@keyframes draw { to { transform: scaleX(1); } }

@media (prefers-reduced-motion: reduce) {
  .rise, .draw { animation: none; opacity: 1; transform: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* ---------- print ------------------------------------------------------
   The page is a two-ink manual; on paper it should behave like one.
   ---------------------------------------------------------------------- */
@media print {
  :root {
    --paper: #FFFFFF;
    --ink: #000000; --ink-2: #333333; --ink-3: #555555;
    --rule: #BBBBBB; --rule-2: #DDDDDD;
    --accent: #96262C; --accent-tint: transparent;
  }
  body { font-size: 11pt; }
  .marks, .ink-toggle { display: none; }
  .rise, .draw { animation: none; opacity: 1; transform: none; }
  .sheet { max-width: none; padding: 0; }
  .sec { break-inside: avoid; page-break-inside: avoid; }
  .entry { break-inside: avoid; page-break-inside: avoid; }
  .hero h1 { font-size: 34pt; }
  .contact-links a::after { content: ""; }
}