/* ============================================================
   Taha Berk Terekli — site styles
   A quiet, single-column editorial layout.
   ============================================================ */

:root {
  --bg: #0d0c0b;
  --ink: #f1efe9;
  --body: #c9c6bf;
  --muted: #6f6c64;
  --faint: #55524b;
  --line: #201f1b;
  --line-2: #2a2820;
  --surface: #151410;
  color-scheme: dark;
}

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

html {
  background: var(--bg);
  scrollbar-gutter: stable;
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  font-family: Geist, ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.62;
  letter-spacing: -0.003em;
  background: var(--bg);
  color: var(--body);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

::selection { background: var(--line-2); color: var(--ink); }

:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  padding: 8px 12px;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-2);
  border-radius: 4px;
  z-index: 20;
}
.skip-link:focus { left: 12px; }

/* ---------- shell ---------- */

.wrap {
  margin: 0 auto;
  display: grid;
  min-height: 100vh;
  max-width: 940px;
  grid-template-columns: 1fr;
  padding: 0 20px;
}

.side { padding-top: 28px; }

.side-inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.side nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
  margin: -6px;          /* absorb the tap padding below */
}

.side nav a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color .16s;
  line-height: 1.4;
  padding: 6px;          /* a real tap target without changing the visual rhythm */
}
.side nav a:hover,
.side nav a[aria-current="page"] { color: var(--ink); }

.content { padding: 26px 0 56px; }

@media (min-width: 768px) {
  .wrap { grid-template-columns: 140px 1fr; padding: 0 24px; }
  .side { padding: 56px 28px 56px 0; }
  .side-inner {
    position: sticky;
    top: 56px;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .side nav { flex-direction: column; gap: 4px; margin: -6px 0 -6px -6px; }
  .content {
    border-left: 1px solid var(--line);
    padding: 56px 0 56px 40px;
  }
}

/* ---------- type helpers ---------- */

.ink { color: var(--ink); }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: 14px; }
.nums { font-variant-numeric: tabular-nums; }

a { color: var(--ink); }

.ulink {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color .16s, color .16s;
}
.ulink:hover { text-decoration-color: var(--ink); }

.plain {
  color: var(--muted);
  text-decoration: none;
  transition: color .16s;
}
.plain:hover { color: var(--ink); }

/* ---------- page header block ---------- */

.avatar {
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  object-fit: cover;
}

.intro h1 {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
}

.intro .role { color: var(--body); }
.intro .tag { color: var(--muted); }

.intro p.blurb {
  margin-top: 2px;
  max-width: 32em;
  color: var(--muted);
}

.wave {
  display: inline-block;
  transform-origin: 70% 70%;
  animation: wave 2.4s ease-in-out 1s 2 both;
}

.rule {
  margin-top: 24px;
  border: 0;
  border-top: 1px solid var(--line);
}

/* ---------- label / content rows ---------- */

.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding: 24px 0;
}
.row:first-child { border-top: 0; }

.row > .label {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

@media (min-width: 768px) {
  .row {
    grid-template-columns: 92px 1fr;
    gap: 32px;
    padding: 28px 0;
  }
  .row > .label { padding-top: 2px; }
}

.row p + p { margin-top: 14px; }

/* ---------- item lists (project / writing entries) ---------- */

.item { margin-bottom: 16px; }
.item:last-child { margin-bottom: 0; }
.item.spaced { margin-bottom: 24px; }

.desc {
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--muted);
}

.metaline {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.icons {
  display: flex;
  align-items: center;
  gap: 16px;
}
.icons a { color: var(--muted); transition: color .16s; }
.icons a:hover { color: var(--ink); }
.icons svg { width: 17px; height: 17px; }

/* ---------- long-form prose ---------- */

.prose { margin-top: 32px; max-width: 38em; }
.prose > * + * { margin-top: 20px; }

.prose h2 {
  padding-top: 12px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}
.prose h3 {
  padding-top: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}
.prose p, .prose li {
  font-size: 16px;
  line-height: 1.72;
  color: var(--body);
  overflow-wrap: break-word;
}
.prose ul, .prose ol { padding-left: 20px; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-top: 8px; }
.prose li::marker { color: var(--faint); }
.prose strong { color: var(--ink); font-weight: 500; }
.prose a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--line-2); text-underline-offset: 2px; text-decoration-thickness: 1px; }
.prose a:hover { text-decoration-color: var(--ink); }

.prose blockquote {
  border-left: 1px solid var(--line-2);
  padding-left: 18px;
  color: var(--muted);
}
.prose blockquote footer { margin-top: 8px; font-size: 14px; color: var(--faint); }

.callout {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 4px;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.65;
}

.formula {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 4px;
  padding: 14px 18px;
  font-family: "Geist Mono", ui-monospace, SFMono-Regular, monospace;
  font-size: 13px;
  color: var(--ink);
  overflow-x: auto;
}

.figure { margin-top: 24px; }
.figure img { border: 1px solid var(--line); border-radius: 4px; width: 100%; height: auto;
  filter: invert(1) hue-rotate(180deg) brightness(.92); }
.figure figcaption { margin-top: 10px; font-size: 13px; line-height: 1.55; color: var(--muted); }

/* ---------- article header ---------- */

.article h1 {
  margin-top: 24px;
  max-width: 16em;
  font-size: 23px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
}
.article .byline {
  margin-top: 12px;
  font-size: 13px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.article .lede {
  margin-top: 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- page heading (sub-pages) ---------- */

.page-head h1 {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}
.page-head p {
  margin-top: 2px;
  max-width: 32em;
  color: var(--muted);
}

/* ---------- chips ---------- */

.chips { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 9px;
  white-space: nowrap;
}

/* ---------- key/value definition rows ---------- */

.kv { margin-top: 12px; }
.kv > div { display: grid; grid-template-columns: 1fr; gap: 2px; padding: 8px 0; border-top: 1px solid var(--line); }
.kv > div:first-child { border-top: 0; padding-top: 0; }
.kv dt { font-size: 13px; color: var(--faint); }
.kv dd { margin: 0; font-size: 14px; line-height: 1.55; color: var(--body); }

@media (min-width: 768px) {
  .kv > div { grid-template-columns: 92px 1fr; gap: 20px; }
}

/* ---------- footer ---------- */

.foot {
  margin-top: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-size: 13px;
  color: var(--faint);
}
.foot a { color: var(--muted); text-decoration: none; transition: color .16s; }
.foot a:hover { color: var(--ink); }

/* ---------- small screens ---------- */

@media (max-width: 767px) {
  /* The label reads as a section heading once the columns stack. */
  .row > .label {
    color: var(--faint);
    font-size: 12px;
    letter-spacing: .04em;
    text-transform: uppercase;
  }

  .row { padding: 22px 0; }

  .intro p.blurb,
  .page-head p,
  .article .lede { max-width: none; }

  .prose { max-width: none; margin-top: 26px; }
  .prose p, .prose li { font-size: 15.5px; line-height: 1.7; }
  .prose ul, .prose ol { padding-left: 18px; }

  .kv > div { padding: 10px 0; }
  .kv dt { font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }

  .callout, .formula { padding: 14px 15px; }

  .foot {
    flex-direction: column;
    gap: 6px;
    padding-top: 20px;
  }
}

@media (min-width: 768px) {
  .article h1 { margin-top: 28px; font-size: 26px; }
}

/* ---------- motion ---------- */

.rise { animation: rise .6s cubic-bezier(.16,1,.3,1) both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(9px); }
  to   { opacity: 1; transform: none; }
}

@keyframes wave {
  0%, 60%, 100% { transform: rotate(0deg); }
  20% { transform: rotate(14deg); }
  40% { transform: rotate(-8deg); }
}

@media (prefers-reduced-motion: reduce) {
  .rise, .wave { animation: none; }
  * { transition-duration: .01ms !important; }
}

/* ---------- print ---------- */

@media print {
  .side, .foot { display: none; }
  .wrap { display: block; max-width: none; padding: 0; }
  .content { border: 0; padding: 0; }
  body { background: #fff; color: #000; font-size: 11pt; }
  a { text-decoration: none; }
}