/* ercindedeoglu.github.io — content hub
   Self-contained, no-JS, fast. Brand: deep indigo/purple. */

:root {
  --bg: #15101f;
  --bg-2: #1c1530;
  --surface: #ffffff;
  --surface-2: #f7f5fb;
  --ink: #1a1626;
  --ink-soft: #4a4360;
  --ink-mute: #6f6885;
  --line: #e7e3f0;
  --brand: #6c4cff;
  --brand-2: #b74e91;
  --brand-deep: #4a2fb0;
  --accent: #c9b6ff;
  --maxw: 1080px;
  --readw: 720px;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20,12,40,.06), 0 8px 30px rgba(20,12,40,.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(21,16,31,.88);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 20px;
}
.brand-mark { display: flex; align-items: baseline; gap: 10px; color: #fff; }
.brand-mark a { color: #fff; font-weight: 700; letter-spacing: -.02em; font-size: 18px; }
.brand-mark .tag {
  font-size: 12px; color: var(--accent); font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
}
.nav { display: flex; gap: 22px; align-items: center; }
.nav a {
  color: #d8d2ea; font-size: 15px; font-weight: 500;
}
.nav a:hover, .nav a[aria-current="page"] { color: #fff; text-decoration: none; }
.nav a[aria-current="page"] { border-bottom: 2px solid var(--brand); padding-bottom: 2px; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1100px 500px at 78% -10%, rgba(108,76,255,.38), transparent 60%),
    radial-gradient(800px 400px at 0% 0%, rgba(183,78,145,.22), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg));
  color: #fff;
}
.hero .container { padding-top: 84px; padding-bottom: 88px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08;
  letter-spacing: -.025em; margin: 0 0 20px; max-width: 18ch; font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--accent), #fff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 1.2rem; color: #cfc8e6; max-width: 60ch; margin: 0 0 28px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: transform .08s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(90deg, var(--brand), var(--brand-2)); color: #fff; box-shadow: 0 8px 24px rgba(108,76,255,.35); }
.btn-ghost { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.2); }
.btn-dark { background: var(--ink); color: #fff; }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--surface-2); border-block: 1px solid var(--line); }
.section h2 { font-size: 1.7rem; letter-spacing: -.02em; margin: 0 0 6px; }
.section .section-sub { color: var(--ink-mute); margin: 0 0 32px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Cards / writing list ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); transition: transform .12s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(20,12,40,.12); }
.card .kicker { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--brand-deep); }
.card h3 { font-size: 1.18rem; line-height: 1.3; margin: 10px 0 8px; letter-spacing: -.01em; }
.card h3 a { color: var(--ink); }
.card p { color: var(--ink-soft); margin: 0 0 16px; font-size: .98rem; }
.card .meta { margin-top: auto; color: var(--ink-mute); font-size: .85rem; }
.card .read { color: var(--brand-deep); font-weight: 600; font-size: .92rem; }

.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { border-top: 1px solid var(--line); }
.post-list li:last-child { border-bottom: 1px solid var(--line); }
.post-list a.row {
  display: grid; grid-template-columns: 1fr auto; gap: 8px 24px; align-items: baseline;
  padding: 22px 4px; color: var(--ink);
}
.post-list a.row:hover { text-decoration: none; }
.post-list a.row:hover .row-title { color: var(--brand-deep); }
.row-title { font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
.row-desc { grid-column: 1 / 2; color: var(--ink-soft); font-size: .98rem; }
.row-meta { color: var(--ink-mute); font-size: .85rem; white-space: nowrap; }

/* ---------- Stat strip ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap: 24px; }
.stat .num { font-size: 2rem; font-weight: 800; letter-spacing: -.02em;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { color: var(--ink-soft); font-size: .95rem; margin-top: 2px; }

/* ---------- Article ---------- */
.article-hero { background: linear-gradient(180deg, var(--bg-2), var(--bg)); color: #fff; }
.article-hero .container { max-width: var(--readw); padding-top: 56px; padding-bottom: 40px; }
.article-hero .kicker { color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; }
.article-hero h1 { font-size: clamp(1.9rem, 4.5vw, 2.7rem); line-height: 1.15; letter-spacing: -.02em; margin: 14px 0 16px; }
.article-hero .byline { color: #c9c2e0; font-size: .95rem; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.article-hero .byline a { color: #fff; }

.article { max-width: var(--readw); margin: 0 auto; padding: 48px 24px 24px; }
.article > * { margin-block: 0 1.25em; }
.article h2 { font-size: 1.55rem; letter-spacing: -.02em; margin-top: 1.8em; line-height: 1.25; }
.article h3 { font-size: 1.22rem; margin-top: 1.5em; }
.article p, .article li { color: #28233a; }
.article ul, .article ol { padding-left: 1.3em; }
.article li { margin-bottom: .5em; }
.article a { text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--accent); }
.article blockquote {
  margin: 1.6em 0; padding: 18px 24px; border-left: 4px solid var(--brand);
  background: var(--surface-2); border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.12rem; color: var(--ink); font-style: italic;
}
.article blockquote cite { display: block; margin-top: 10px; font-size: .9rem; color: var(--ink-mute); font-style: normal; }
.article pre {
  background: #14111f; color: #e8e3f6; padding: 18px 20px; border-radius: var(--radius);
  overflow-x: auto; font-size: .9rem; line-height: 1.55;
}
.article :not(pre) > code {
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px;
  padding: .12em .4em; font-size: .9em;
}
.article pre code { background: none; border: 0; padding: 0; color: inherit; }
.article table { width: 100%; border-collapse: collapse; font-size: .95rem; margin: 1.4em 0; }
.article th, .article td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article thead th { background: var(--surface-2); font-weight: 700; }
.article-sources { max-width: var(--readw); margin: 0 auto; padding: 8px 24px 40px; }
.article-sources h2 { font-size: 1.1rem; }
.article-sources ol { color: var(--ink-soft); font-size: .92rem; }

.backlink { display: inline-block; margin-bottom: 8px; color: var(--accent); font-weight: 600; font-size: .9rem; }

/* ---------- About bio ---------- */
.prose { max-width: var(--readw); }
.prose p { color: var(--ink-soft); }
.callout {
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; margin: 24px 0;
}

/* ---------- Footer ---------- */
.site-footer { background: var(--bg); color: #b9b1d4; padding: 48px 0; margin-top: 24px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; }
.site-footer a { color: #e7e2f6; }
.social { display: flex; gap: 8px; list-style: none; margin: 0; padding: 0; }
.social a {
  width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%; background: rgba(255,255,255,.08); color: #fff; font-size: 16px;
}
.social a:hover { background: var(--brand); text-decoration: none; }
.foot-note { font-size: .85rem; color: #8a82a6; }

/* ---------- Utility ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 10px; z-index: 100; background: #fff; color: var(--ink); padding: 8px 14px; border-radius: 8px; }

@media (max-width: 680px) {
  .nav { gap: 14px; }
  .brand-mark .tag { display: none; }
  .post-list a.row { grid-template-columns: 1fr; }
  .row-meta { grid-column: 1; }
}

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