/* Koyu tema varsayılan; sistem açık tema istiyorsa aşağıdaki media bloğu
   devralır. Tüm bileşenler token üzerinden boyanır. */
:root {
  --bg: #0e1216;
  --card: #151b22;
  --fg: #e6ebf0;
  --muted: #8f9ba6;
  --border: #232c35;
  --acc: #2fb6d9;
  --acc-soft: rgba(47, 182, 217, 0.12);
  --glow: rgba(47, 182, 217, 0.10);
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --fg: #191f26;
    --muted: #5c6875;
    --border: #dfe4ea;
    --acc: #0b7d9b;
    --acc-soft: rgba(11, 125, 155, 0.09);
    --glow: rgba(11, 125, 155, 0.07);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

a { color: inherit; text-decoration: none; }

.wrap { max-width: 66rem; margin: 0 auto; padding: 0 1.4rem; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }

/* header */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  padding: 1.3rem 0;
}
.logo { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; }
.logo i {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--acc);
  color: #fff;
  font-style: normal;
  font-size: 0.8rem;
  font-weight: 800;
}
.logo b { color: var(--acc); }
.top nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  font-size: 0.92rem;
  color: var(--muted);
  align-items: center;
}
.top nav a:hover { color: var(--acc); }
.top nav .lang {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.05rem 0.55rem;
  font-size: 0.8rem;
  font-family: ui-monospace, Menlo, monospace;
}

/* hero */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 4rem 0 3.4rem;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -4rem -10rem auto auto;
  width: 34rem;
  height: 26rem;
  background: radial-gradient(closest-side, var(--glow), transparent 70%);
  pointer-events: none;
}
.eyebrow {
  margin: 0 0 0.9rem;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--acc);
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5.6vw, 4rem);
  line-height: 1.03;
  letter-spacing: -0.03em;
  font-weight: 800;
  text-wrap: balance;
}
.hero .role { margin: 1.1rem 0 0; font-size: 1.2rem; font-weight: 650; }
.hero .tagline { margin: 0.9rem 0 0; max-width: 30rem; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.8rem; align-items: center; }
.btn {
  display: inline-block;
  padding: 0.62rem 1.25rem;
  border-radius: 9px;
  font-weight: 650;
  font-size: 0.95rem;
  border: 1px solid var(--acc);
}
.btn.fill { background: var(--acc); color: #fff; }
.btn.fill:hover { filter: brightness(1.1); }
.btn.ghost { color: var(--acc); }
.btn.ghost:hover { background: var(--acc-soft); }
.btn.big { font-size: 1.05rem; }
.hero-social { display: flex; gap: 1.1rem; margin-left: 0.4rem; color: var(--muted); font-size: 0.88rem; }
.hero-social a:hover { color: var(--acc); }

.photo-wrap { position: relative; justify-self: end; width: min(19rem, 100%); }
.photo-frame {
  position: absolute;
  inset: 0;
  transform: translate(16px, 16px);
  border-radius: 20px;
  border: 2px solid var(--acc);
  opacity: 0.55;
}
.photo {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* fact şeridi */
.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0 3rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.facts div { padding: 0.4rem 0; }
.facts b { display: block; font-size: 1.35rem; letter-spacing: -0.01em; }
.facts span { font-size: 0.82rem; color: var(--muted); }

/* bölümler */
section { padding: 3.4rem 0 0; }
.shead { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1.4rem; }
.shead h2 { margin: 0; font-size: 1.45rem; letter-spacing: -0.015em; }
.shead .rule { flex: 1; height: 1px; background: var(--border); }
.shead .hint { font-size: 0.8rem; color: var(--muted); }
.para { max-width: 44rem; margin: 0.8rem 0; }
.para + .para { color: var(--muted); }
.section-note { color: var(--muted); margin: 0 0 1.2rem; max-width: 44rem; }

/* neler yapıyorum */
.do-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; }
.do {
  padding: 1.3rem 1.3rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}
.do h3 { margin: 0 0 0.4rem; font-size: 1.02rem; }
.do p { margin: 0; font-size: 0.9rem; line-height: 1.6; color: var(--muted); }

/* açık kaynak grid */
.proj-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.proj {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.proj:hover { border-color: var(--acc); transform: translateY(-2px); }
.proj .head { display: flex; justify-content: space-between; align-items: baseline; }
.proj h3 { margin: 0; font-size: 1.05rem; }
.proj .arrow { color: var(--acc); opacity: 0; transition: opacity 0.15s; }
.proj:hover .arrow { opacity: 1; }
.proj p { margin: 0; font-size: 0.9rem; line-height: 1.6; color: var(--muted); flex: 1; }
.more { margin-top: 1.3rem; font-weight: 600; }
.more a { color: var(--acc); }
.more a:hover { text-decoration: underline; }

/* yazılar */
ul.articles { list-style: none; margin: 0; padding: 0; max-width: 46rem; }
ul.articles li { border-bottom: 1px solid var(--border); }
ul.articles a {
  display: flex;
  gap: 1.2rem;
  align-items: baseline;
  padding: 0.85rem 0.4rem;
  border-radius: 8px;
}
ul.articles a:hover { background: var(--acc-soft); }
ul.articles .dt {
  font-size: 0.78rem;
  color: var(--muted);
  min-width: 5.4rem;
  font-family: ui-monospace, Menlo, monospace;
}
ul.articles .t { flex: 1; }
ul.articles a:hover .t { color: var(--acc); }
ul.articles .lg {
  font-size: 0.7rem;
  color: var(--acc);
  font-family: ui-monospace, Menlo, monospace;
}

/* kapanış */
.close { text-align: center; padding: 4.4rem 0 2.6rem; }
.close h2 { margin: 0; font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -0.02em; }
.close p { margin: 0.9rem auto 1.6rem; max-width: 30rem; color: var(--muted); }
.close-social { display: flex; justify-content: center; gap: 1.6rem; margin-top: 1.4rem; color: var(--muted); font-size: 0.92rem; }
.close-social a:hover { color: var(--acc); }

footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.4rem 0 2.4rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
}

/* portfolyo sayfası */
.pf-head { padding: 3rem 0 0.6rem; }
.pf-head h1 { margin: 0; font-size: clamp(2.2rem, 5vw, 3.2rem); letter-spacing: -0.03em; font-weight: 800; }
.pf-head .tagline { margin: 0.8rem 0 0; color: var(--muted); max-width: 40rem; }

.timeline { display: flex; flex-direction: column; gap: 1.6rem; }
.exp {
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--acc);
  border-radius: 14px;
  background: var(--card);
}
.exp h3 { margin: 0; font-size: 1.08rem; }
.exp .org { color: var(--acc); font-weight: 600; }
.exp .meta {
  margin: 0.2rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  font-family: ui-monospace, Menlo, monospace;
}
.exp .summary { margin: 0.7rem 0 0; color: var(--muted); font-size: 0.95rem; }
.exp ul, .wp ul { margin: 0.7rem 0 0; padding-left: 1.2rem; }
.exp li, .wp li { margin: 0.3rem 0; font-size: 0.93rem; }
.exp li::marker, .wp li::marker { color: var(--acc); }

.wp-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.wp {
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}
.wp header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.3rem 1rem; }
.wp h3 { margin: 0; font-size: 1.02rem; }
.wp .stack {
  font-size: 0.68rem;
  padding: 0.14rem 0.55rem;
  border-radius: 999px;
  color: var(--acc);
  background: var(--acc-soft);
  font-family: ui-monospace, Menlo, monospace;
  white-space: nowrap;
}
.wp .summary { margin: 0.6rem 0 0; color: var(--muted); font-size: 0.9rem; }

.group-label {
  margin: 1.6rem 0 0.4rem;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
ul.oss-list { list-style: none; margin: 0; padding: 0; }
ul.oss-list li { margin: 0.4rem 0; font-size: 0.95rem; }
ul.oss-list a { color: var(--acc); font-weight: 600; }
ul.oss-list a:hover { text-decoration: underline; }
ul.oss-list .dash { color: var(--muted); }

dl.skills { margin: 0; display: flex; flex-direction: column; gap: 0.55rem; max-width: 48rem; }
dl.skills div { display: grid; grid-template-columns: 11rem 1fr; gap: 1rem; }
dl.skills dt { font-weight: 650; font-size: 0.9rem; }
dl.skills dd { margin: 0; color: var(--muted); font-size: 0.93rem; }

/* 404 */
.notfound { padding: 7rem 0; text-align: center; }
.notfound h1 { font-size: 1.6rem; margin: 0.4rem 0 1rem; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 2.4rem; }
  .photo-wrap { justify-self: center; order: -1; width: min(14rem, 76%); }
  .facts { gap: 0 1.8rem; }
  .proj-grid, .wp-list { grid-template-columns: 1fr; }
  dl.skills div { grid-template-columns: 1fr; gap: 0.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .proj { transition: none; }
  .proj:hover { transform: none; }
}