/* ── Mohsen Mirzakhani — custom theme ─────────────────────────────── */

:root {
  --bg: oklch(0.985 0.006 70);
  --bg2: oklch(0.965 0.010 70);
  --surface: oklch(1 0 0);
  --text: oklch(0.235 0.014 300);
  --muted: oklch(0.52 0.014 300);
  --line: oklch(0.905 0.010 70);
  --accent: oklch(0.52 0.15 300);
  --accent-ink: oklch(0.42 0.15 300);
  --accent-soft: oklch(0.955 0.025 300);
  --sh1: rgba(40, 28, 50, 0.05);
  --sh2: rgba(40, 28, 50, 0.16);
  --stripe: oklch(0.90 0.014 300);
  --stripe-bg: oklch(0.955 0.012 300);

  --sans: "Bricolage Grotesque", system-ui, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --shadow-sm: 0 1px 2px var(--sh1);
  --shadow-md: 0 1px 2px var(--sh1), 0 16px 32px -28px var(--sh2);
  --shadow-lg: 0 1px 2px var(--sh1), 0 24px 48px -32px var(--sh2);
}

[data-theme="dark"] {
  --bg: oklch(0.185 0.014 300);
  --bg2: oklch(0.215 0.016 300);
  --surface: oklch(0.235 0.018 300);
  --text: oklch(0.945 0.008 70);
  --muted: oklch(0.685 0.014 300);
  --line: oklch(0.315 0.018 300);
  --accent: oklch(0.76 0.13 300);
  --accent-ink: oklch(0.82 0.11 300);
  --accent-soft: oklch(0.275 0.035 300);
  --sh1: rgba(0, 0, 0, 0.30);
  --sh2: rgba(0, 0, 0, 0.55);
  --stripe: oklch(0.33 0.025 300);
  --stripe-bg: oklch(0.255 0.020 300);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--serif); -webkit-font-smoothing: antialiased;
  min-height: 100dvh; display: flex; flex-direction: column;
}
body > main { flex: 1 0 auto; padding-bottom: 120px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { color: var(--accent); }
::selection { background: var(--accent-soft); color: var(--text); }

.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 28px; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.accent { color: var(--accent); }
.block { margin-top: 72px; }

.kicker {
  font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 20px;
}
.label {
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 12px; font-weight: 500;
}
.meta {
  font-size: 11px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 12px;
}
.rule { display: flex; align-items: baseline; gap: 14px; margin-bottom: 22px; }
.rule .label { margin: 0; }
.rule > span:first-of-type { flex: 1; height: 1px; background: var(--line); }

/* ── header ──────────────────────────────────────────────────────── */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--line);
}
.head-inner { display: flex; align-items: center; gap: 28px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { color: var(--text); }
.brand-mark {
  width: 40px; height: 13px; flex-shrink: 0;
  object-fit: contain;
}
[data-theme="dark"] .brand-mark { filter: invert(1); }
.brand-name { font-family: var(--sans); font-weight: 800; font-size: 16px; letter-spacing: -0.02em; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.02em;
  color: var(--muted); padding: 8px 11px; border-radius: 8px;
}
.nav a:hover { background: var(--bg2); color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); background: var(--bg2); }
.theme-toggle {
  margin-left: 8px; width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--line); background: var(--surface); border-radius: 10px;
  cursor: pointer; color: var(--muted); font-size: 13px; box-shadow: var(--shadow-sm);
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ── hero ────────────────────────────────────────────────────────── */
.hero {
  padding: 88px 0 64px;
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 64px; align-items: end;
}
.hero-title {
  font-family: var(--sans); font-weight: 800;
  font-size: clamp(44px, 5.6vw, 78px); line-height: 0.94; letter-spacing: -0.035em;
  margin: 0 0 26px; text-wrap: balance;
}
.hero-lead { font-size: 20px; line-height: 1.55; color: var(--muted); margin: 0; max-width: 46ch; text-wrap: pretty; }
.hero-side { border-left: 1px solid var(--line); padding-left: 28px; display: grid; gap: 18px; }
.side-text { margin: 0; font-size: 17px; line-height: 1.45; }

.pills { display: flex; gap: 10px; margin-top: 32px; flex-wrap: wrap; }
.pill {
  font-family: var(--mono); font-size: 12.5px; padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); background: var(--surface);
}
.pill:hover { border-color: var(--accent); color: var(--accent); }
.pill--solid {
  background: var(--text); color: var(--bg); border-color: var(--text);
  box-shadow: 0 2px 10px -2px var(--sh2);
}
.pill--solid:hover { color: var(--bg); opacity: 0.86; }

/* ── covers ──────────────────────────────────────────────────────── */
.cover { border-bottom: 1px solid var(--line); overflow: hidden; }
.cover--img img { width: 100%; height: 100%; object-fit: cover; }
.cover--slot {
  background: repeating-linear-gradient(135deg, var(--stripe-bg) 0 9px, var(--stripe) 9px 10px);
  display: grid; place-items: center;
}
.slot-label {
  font-size: 10.5px; letter-spacing: 0.06em; color: var(--muted);
  background: var(--surface); border: 1px solid var(--line);
  padding: 6px 11px; border-radius: 999px;
}
.cover--type {
  background: linear-gradient(155deg, var(--accent-soft), var(--bg2));
  display: flex; align-items: flex-end; padding: 22px;
}
.cover--type[data-cat="devops"] { background: linear-gradient(155deg, var(--accent-soft), var(--bg2)); }
.cover--type[data-cat="programming"] { background: linear-gradient(200deg, var(--accent-soft), var(--bg2)); }
.cover--type[data-cat="development"] { background: linear-gradient(120deg, var(--accent-soft), var(--bg2)); }
.cover--type span {
  font-family: var(--sans); font-weight: 800; letter-spacing: -0.04em; line-height: 0.9;
  color: var(--accent); opacity: 0.85; font-size: 38px;
}
.cover--type.cover--lg span { font-size: clamp(48px, 7vw, 96px); }

/* ── cards ───────────────────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
  overflow: hidden; box-shadow: var(--shadow-md); color: var(--text);
  transition: transform .25s cubic-bezier(.2, .7, .3, 1), box-shadow .25s, border-color .2s;
}
a.card:hover {
  color: var(--text); transform: translateY(-3px);
  box-shadow: 0 2px 4px var(--sh1), 0 26px 44px -26px var(--sh2);
}
.card--dashed { border-style: dashed; background: var(--bg2); box-shadow: none; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 22px; }
.post-card { display: flex; flex-direction: column; }
.card-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.card-title {
  font-family: var(--sans); font-weight: 600; font-size: 22px; line-height: 1.15;
  letter-spacing: -0.02em; margin: 0 0 10px; text-wrap: balance;
}
.card-summary { font-size: 16.5px; line-height: 1.5; color: var(--muted); margin: 0; }
.subscribe { display: flex; flex-direction: column; justify-content: center; gap: 14px; padding: 28px; }

.feature {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  border-radius: 20px; box-shadow: var(--shadow-lg);
}
.feature .cover { border-bottom: 0; }
.feature-body { padding: 44px; display: flex; flex-direction: column; justify-content: center; }
.feature-title {
  font-family: var(--sans); font-weight: 800; font-size: clamp(28px, 3vw, 40px);
  line-height: 1.03; letter-spacing: -0.03em; margin: 0 0 16px; text-wrap: balance;
}
.feature-summary { font-size: 18px; line-height: 1.55; color: var(--muted); margin: 0; text-wrap: pretty; }
.read-more { font-size: 12.5px; margin-top: 24px; }

/* ── page + post ─────────────────────────────────────────────────── */
.page { padding-top: 72px; }
.page-title {
  font-family: var(--sans); font-weight: 800; font-size: clamp(40px, 4.8vw, 66px);
  line-height: 0.97; letter-spacing: -0.035em; margin: 0 0 40px; max-width: 22ch;
}
.back { display: inline-block; margin-top: 56px; font-size: 12.5px; color: var(--muted); }
.back:hover { color: var(--accent); }
.post-head { max-width: 760px; margin: 36px 0 40px; }
.post-title {
  font-family: var(--sans); font-weight: 800; font-size: clamp(38px, 4.6vw, 64px);
  line-height: 0.98; letter-spacing: -0.035em; margin: 0 0 22px; text-wrap: balance;
}
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tags--wrap { gap: 9px; }
.tag {
  font-size: 11.5px; color: var(--muted); border: 1px solid var(--line);
  background: var(--surface); padding: 5px 11px; border-radius: 999px;
}
.tag:hover { border-color: var(--accent); color: var(--accent); }
.post-cover { margin-bottom: 56px; }
.post-cover .cover {
  border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow-lg);
}
.post-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 64px; align-items: start; }
.post-side { position: sticky; top: 96px; display: grid; gap: 26px; }
.side-block { border-top: 1px solid var(--line); padding-top: 22px; }
.share { display: flex; gap: 8px; }
.toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.toc ul ul { padding-left: 14px; margin-top: 9px; }
.toc a { font-size: 16px; line-height: 1.35; color: var(--muted); }
.toc a:hover { color: var(--accent); }

/* ── prose ───────────────────────────────────────────────────────── */
.prose { max-width: 70ch; font-size: 20px; line-height: 1.68; }
.prose--page { max-width: 66ch; font-size: 19px; line-height: 1.62; }
.prose > p { margin: 0 0 26px; }
.prose > p:first-of-type { font-size: 1.14em; line-height: 1.55; }
.prose--page > p:first-of-type { font-size: 1em; }
.prose h2, .prose h3, .prose h4 {
  font-family: var(--sans); font-weight: 800; letter-spacing: -0.028em; line-height: 1.1;
  margin: 52px 0 18px;
}
.prose h2 { font-size: 32px; }
.prose h3 { font-size: 26px; }
.prose h4 { font-size: 21px; }
.prose img { border-radius: 16px; border: 1px solid var(--line); margin: 34px 0; box-shadow: var(--shadow-md); }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 26px; }
.prose li { margin-bottom: 12px; }
.prose blockquote {
  margin: 38px 0; padding: 0 0 0 28px; border-left: 3px solid var(--accent);
  font-family: var(--sans); font-weight: 600; font-size: 27px; line-height: 1.28; letter-spacing: -0.02em;
}
.prose blockquote p { margin: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.prose code {
  font-family: var(--mono); font-size: 0.82em; background: var(--bg2);
  border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px;
}
.prose pre {
  font-family: var(--mono); font-size: 14px; line-height: 1.7;
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px; overflow-x: auto; margin: 34px 0; box-shadow: var(--shadow-md);
}
.prose pre code { background: none; border: 0; padding: 0; font-size: 14px; }
.prose table { width: 100%; border-collapse: collapse; margin: 34px 0; font-size: 17px; }
.prose th, .prose td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.prose th { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 500; }

/* ── post nav ────────────────────────────────────────────────────── */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  margin: 88px 0 0; padding-top: 36px; border-top: 1px solid var(--line);
}
.nav-card { padding: 26px; border-radius: 16px; }
.nav-card--next { text-align: right; }
.nav-card:hover { border-color: var(--accent); }
.nav-title { font-family: var(--sans); font-weight: 600; font-size: 20px; letter-spacing: -0.02em; line-height: 1.2; margin: 0; }
.nav-empty { display: grid; place-items: center; padding: 26px; border-radius: 16px; }
.nav-empty p { margin: 0; font-size: 12px; }

/* ── categories ──────────────────────────────────────────────────── */
.count-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-bottom: 64px; }
.count-card { padding: 26px; border-radius: 16px; box-shadow: var(--shadow-sm); }
.count { font-family: var(--sans); font-weight: 800; font-size: 40px; letter-spacing: -0.04em; margin: 0 0 6px; color: var(--accent); }
.count-name { font-family: var(--sans); font-weight: 600; font-size: 20px; letter-spacing: -0.02em; margin: 0; }

/* ── search ──────────────────────────────────────────────────────── */
.search-input {
  width: 100%; max-width: 640px; font-family: var(--serif); font-size: 19px;
  padding: 16px 20px; color: var(--text); background: var(--surface);
  border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow-sm);
}
.search-input:focus { outline: none; border-color: var(--accent); }
.post-card--plain .card-body { padding: 24px; }

/* ── pagination ──────────────────────────────────────────────────── */
.pagination { display: flex; gap: 8px; list-style: none; padding: 0; margin: 56px 0 0; justify-content: center; }
.pagination .page-item a, .pagination .page-item span {
  font-family: var(--mono); font-size: 13px; padding: 9px 14px; border-radius: 10px;
  border: 1px solid var(--line); color: var(--muted); display: block;
}
.pagination .active a, .pagination .active span { color: var(--accent); border-color: var(--accent); }

/* ── footer ──────────────────────────────────────────────────────── */
.site-foot { border-top: 1px solid var(--line); background: var(--bg2); margin-top: auto; }
.foot-inner { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; padding-block: 44px; }
.foot-inner p { font-size: 12px; margin: 0; }
.foot-links { margin-left: auto; display: flex; gap: 20px; font-size: 12px; }

/* ── responsive ──────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 56px; align-items: start; }
  .hero-side { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0 0; }
  .feature { grid-template-columns: 1fr; }
  .feature-body { padding: 32px 28px 34px; }
  .post-layout { grid-template-columns: 1fr; gap: 40px; }
  .post-side { position: static; order: -1; }
  .post-nav { grid-template-columns: 1fr; }
  .nav-card--next { text-align: left; }
}
@media (max-width: 640px) {
  .wrap { padding-inline: 20px; }
  .nav { gap: 0; }
  .nav a { padding: 8px 8px; font-size: 12px; }
  .prose { font-size: 18px; }
  .prose h2 { font-size: 27px; }
  .prose blockquote { font-size: 22px; padding-left: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto; }
}