/* ==========================================================================
   mehmetakifakkus.github.io: site styles (light + dark)
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --card: #ffffff;
  --fg: #111827;
  --fg-soft: #374151;
  --muted: #5b6472;
  --line: #e5e7eb;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff4ff;
  --code-bg: #f3f4f6;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .04);
  --font: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --bg-soft: #161920;
  --card: #1a1d24;
  --fg: #e8eaed;
  --fg-soft: #c9ccd1;
  --muted: #9aa1ab;
  --line: #2a2e37;
  --accent: #6ea8ff;
  --accent-hover: #9cc3ff;
  --accent-soft: #1b2638;
  --code-bg: #20242c;
  --shadow: none;
  color-scheme: dark;
}

/* Base ------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main { flex: 1; }
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
h1, h2, h3, h4 { color: var(--fg); line-height: 1.25; letter-spacing: -.015em; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.wrap-narrow { max-width: 740px; margin: 0 auto; padding: 0 24px; }

/* Header ----------------------------------------------------------------- */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; justify-content: space-between; align-items: center; height: 72px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--fg); white-space: nowrap; }
.logo:hover { color: var(--fg); text-decoration: none; }
.logo-mark { width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 13px; letter-spacing: 0; }
[data-theme="dark"] .logo-mark { color: #0f1115; }
.site-nav { display: flex; align-items: center; gap: 4px; font-size: 15px; font-weight: 500; }
.site-nav a { color: var(--muted); padding: 6px 12px; border-radius: 8px; }
.site-nav a:hover { color: var(--fg); background: var(--bg-soft); text-decoration: none; }
.site-nav a.active { color: var(--fg); background: var(--bg-soft); }
.theme-toggle { background: none; border: 0; color: var(--muted); font-size: 17px; line-height: 1; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.theme-toggle:hover { color: var(--fg); background: var(--bg-soft); }

/* Footer ----------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 72px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; padding-top: 28px; padding-bottom: 40px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--fg); }

/* Shared bits ------------------------------------------------------------ */
.eyebrow { color: var(--accent); font-weight: 600; font-size: 14px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 4px 0 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: 13px; color: var(--fg-soft); }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 10px; font-weight: 600; font-size: 14px; border: 1px solid var(--line); color: var(--fg); background: var(--card); }
.btn:hover { text-decoration: none; color: var(--fg); border-color: var(--muted); }
.btn-primary { background: var(--fg); border-color: var(--fg); color: var(--bg); }
.btn-primary:hover { color: var(--bg); opacity: .9; border-color: var(--fg); }
.tag { display: inline-block; margin: 0 6px 8px 0; padding: 3px 11px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 500; }
.tag:hover { text-decoration: none; filter: brightness(.96); }
.tag small { color: var(--muted); margin-left: 3px; font-size: 12px; }

.section { padding-top: 56px; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 24px; }
.section-head h2 { font-size: 24px; margin: 0; }
.more { font-weight: 600; font-size: 14px; white-space: nowrap; }

/* Hero ------------------------------------------------------------------- */
.hero { display: grid; grid-template-columns: 220px 1fr; gap: 56px; align-items: center; padding-top: 72px; padding-bottom: 64px; }
.hero-photo { width: 220px; height: 220px; border-radius: 24px; object-fit: cover; }
.hero h1 { font-size: 46px; line-height: 1.1; letter-spacing: -.025em; margin: 0 0 16px; }
.hero .lead { font-size: 19px; color: var(--muted); margin: 0 0 24px; max-width: 620px; }
.hero .chips { margin-bottom: 28px; }

/* Project cards ---------------------------------------------------------- */
.band { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 56px 0; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(16, 24, 40, .08); }
.card-img { display: block; border-bottom: 1px solid var(--line); background: #fff; }
.card-img img { display: block; width: 100%; height: 160px; object-fit: cover; object-position: center top; }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.card h3 { font-size: 16px; margin: 0 0 6px; }
.card p { font-size: 14px; color: var(--muted); margin: 0 0 14px; flex: 1; }
.card-links { display: flex; gap: 16px; font-size: 13px; font-weight: 600; }

/* Post lists ------------------------------------------------------------- */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list-2col { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; }
.post-item a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--fg); }
.post-item a:hover { text-decoration: none; }
.post-item a:hover .post-item-title { color: var(--accent); }
.post-item-title { display: block; font-weight: 600; }
.post-item-meta { display: block; color: var(--muted); font-size: 13px; margin-top: 2px; }
.post-item-snippet { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; }
.year { font-size: 14px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 40px 0 4px; }

/* Pages ------------------------------------------------------------------ */
.page { padding-top: 56px; }
.page-header { margin-bottom: 32px; }
.page-header h1 { font-size: 38px; margin: 0; letter-spacing: -.02em; }
.blog-tools { display: flex; align-items: center; gap: 16px; }
.blog-tools input { flex: 1; font: inherit; font-size: 15px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--fg); }
.blog-tools input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.blog-tools a { font-weight: 600; font-size: 14px; white-space: nowrap; }
.tag-cloud { margin: 0 0 8px; }
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.contact-card { display: flex; flex-direction: column; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); color: var(--fg); }
.contact-card:hover { text-decoration: none; border-color: var(--accent); }
.contact-card span { color: var(--muted); font-size: 14px; }

/* Article ---------------------------------------------------------------- */
.article { padding-top: 56px; }
.article-header { margin-bottom: 36px; }
.article-header h1 { font-size: 40px; line-height: 1.15; letter-spacing: -.025em; margin: 6px 0 12px; }
.article-meta { color: var(--muted); font-size: 15px; margin: 0; }
.article-tags { margin: 0; }

.prose { font-size: 17.5px; line-height: 1.75; color: var(--fg-soft); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { color: var(--fg); margin: 2em 0 .6em; }
.prose h1 { font-size: 30px; }
.prose h2 { font-size: 26px; }
.prose h3 { font-size: 21px; }
.prose h4 { font-size: 18px; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table, .prose pre { margin: 0 0 1.25em; }
.prose li { margin: .3em 0; }
.prose a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: currentColor; }
.prose img { display: block; margin: 1.75em auto; border-radius: 10px; }
.prose blockquote { border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; color: var(--muted); font-style: italic; margin-left: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }
.prose table { display: block; overflow-x: auto; border-collapse: collapse; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.prose th { background: var(--bg-soft); }
.prose code { font-family: var(--mono); font-size: .86em; background: var(--code-bg); padding: .15em .4em; border-radius: 5px; }
.prose pre { font-family: var(--mono); font-size: 14px; line-height: 1.6; padding: 16px 18px; border-radius: 10px; overflow-x: auto; background: var(--code-bg); border: 1px solid var(--line); }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose iframe, .prose video { max-width: 100%; }
.prose .codepen { margin-bottom: 1.25em; }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 56px 0 24px; }
.post-nav a { display: block; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; color: var(--fg); font-weight: 600; font-size: 15px; }
.post-nav a:hover { text-decoration: none; border-color: var(--accent); }
.post-nav small { display: block; color: var(--muted); font-weight: 500; font-size: 13px; margin-bottom: 4px; }
.post-nav-next { grid-column: 2; text-align: right; }
.comments { margin-top: 40px; }

/* Responsive ------------------------------------------------------------- */
@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .wrap-narrow { padding: 0 20px; }
  .site-header .wrap { height: 64px; }
  .logo-name { display: none; }
  .site-nav { font-size: 14px; }
  .site-nav a { padding: 6px 9px; }
  .hide-sm { display: none; }
  .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 40px; padding-bottom: 48px; }
  .hero-photo { width: 112px; height: 112px; border-radius: 20px; }
  .hero h1 { font-size: 32px; }
  .hero .lead { font-size: 17px; }
  .band { padding: 44px 0; }
  .grid, .post-list-2col, .contact-grid { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 6px; }
  .page { padding-top: 36px; }
  .page-header h1 { font-size: 30px; }
  .article { padding-top: 36px; }
  .article-header h1 { font-size: 30px; }
  .prose { font-size: 16.5px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-next { grid-column: 1; }
}