/* ============================================================
   nadim.saliby — field notes
   dark terminal-editorial · Space Grotesk / Inter / IBM Plex Mono
   ============================================================ */

:root {
  --bg: #0a0e12;
  --bg-raised: #10161d;
  --bg-code: #0d1319;
  --ink: #e8edf2;
  --ink-dim: #97a4b2;
  --ink-faint: #5e6d7c;
  --accent: #c6f24e;
  --accent-ink: #0a0e12;
  --accent-dim: rgba(198, 242, 78, 0.12);
  --line: #1d2631;
  --line-strong: #2a3644;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --w-content: 72ch;
  --w-wide: 1140px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(198, 242, 78, 0.05), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(78, 168, 242, 0.04), transparent 60%);
  background-attachment: fixed;
}

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

.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }
.mono-accent { font-family: var(--font-mono); color: var(--accent); }

a { color: var(--ink); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 0.5rem 1rem; font-family: var(--font-mono); z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- reading progress ---------- */
.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60;
  background: transparent;
}
.progress__bar {
  height: 100%; width: 0;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(198, 242, 78, 0.6);
}

/* ---------- masthead ---------- */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 18, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.masthead__inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.masthead__brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.masthead__sigil { color: var(--accent); margin-right: 0.1em; }
.masthead__links { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.masthead__links a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 160ms ease;
}
.masthead__links a:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero { border-bottom: 1px solid var(--line); }
.hero__inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(4rem, 10vw, 8rem) 1.5rem clamp(3rem, 7vw, 5.5rem);
}
.hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.4rem;
  letter-spacing: 0.04em;
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.6rem, 7.5vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin-bottom: 1.6rem;
  text-wrap: balance;
}
.hero__title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
.hero__lede {
  max-width: 56ch;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--ink-dim);
  margin-bottom: 2.2rem;
}
.hero__lede strong { color: var(--ink); font-weight: 600; }
.hero__stats {
  font-size: 0.82rem;
  color: var(--ink-faint);
  display: flex; gap: 0.9rem; flex-wrap: wrap;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.hero__sep { color: var(--accent); }

/* ---------- posts index / ledger ---------- */
.posts__inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem 5rem;
}
.posts__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
  margin-bottom: 2.2rem;
}
.posts__label {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}
.posts__tools {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.search {
  display: flex; align-items: center; gap: 0.5rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  transition: border-color 160ms ease;
}
.search:focus-within { border-color: var(--accent); }
.search__sigil { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-faint); }
.search:focus-within .search__sigil { color: var(--accent); }
.search__input {
  background: none; border: none; outline: none;
  color: var(--ink);
  font-size: 0.82rem;
  width: 11rem;
}
.search__input::placeholder { color: var(--ink-faint); }
.search__input::-webkit-search-cancel-button { -webkit-appearance: none; }
.ledger__empty {
  padding: 2rem 0.5rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--line);
}
.posts__filters { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}
.chip:hover { color: var(--ink); border-color: var(--ink-faint); }
.chip--active {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}
.chip--active:hover { color: var(--accent-ink); border-color: var(--accent); }

.ledger { list-style: none; border-top: 1px solid var(--line); }
.ledger__row { border-bottom: 1px solid var(--line); }
.ledger__row.is-hidden { display: none; }
.ledger__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: start;
  padding: clamp(1.4rem, 3vw, 2.2rem) 0.5rem;
  text-decoration: none;
  transition: background 180ms ease;
}
.ledger__link:hover { background: var(--bg-raised); }
.ledger__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-faint);
  padding-top: 0.45rem;
  transition: color 180ms ease;
}
.ledger__link:hover .ledger__num { color: var(--accent); }
.ledger__body { min-width: 0; }
.ledger__meta {
  display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.55rem;
}
.ledger__cat { color: var(--accent); }
.ledger__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.6vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
  text-wrap: balance;
}
.ledger__desc {
  display: block;
  color: var(--ink-dim);
  font-size: 0.95rem;
  max-width: 68ch;
}
.ledger__arrow {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ink-faint);
  padding-top: 0.35rem;
  transition: color 180ms ease, transform 180ms ease;
}
.ledger__link:hover .ledger__arrow {
  color: var(--accent);
  transform: translate(3px, -3px);
}

/* ---------- post page ---------- */
.post__header {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5rem) 1.5rem 0;
}
.post__kicker {
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-bottom: 1.2rem;
  letter-spacing: 0.04em;
}
.post__kicker a { color: var(--accent); text-decoration: none; }
.post__kicker a:hover { text-decoration: underline; }
.post__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 26ch;
  margin-bottom: 1.2rem;
  text-wrap: balance;
}
.post__lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--ink-dim);
  max-width: 62ch;
  margin-bottom: 1.6rem;
}
.post__meta {
  font-size: 0.8rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.post__sep { color: var(--accent); margin: 0 0.6rem; }
.post__hero {
  max-width: var(--w-wide);
  margin: 2.5rem auto 0;
  padding: 0 1.5rem;
}
.post__hero img {
  width: 100%; height: auto;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  display: block;
}

.post__layout {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) 1.5rem 3rem;
  display: grid;
  grid-template-columns: minmax(0, var(--w-content)) 250px;
  gap: clamp(2rem, 5vw, 4.5rem);
  justify-content: center;
  align-items: start;
}
@media (max-width: 980px) {
  .post__layout { grid-template-columns: minmax(0, var(--w-content)); }
  .toc { order: -1; }
}

/* ---------- toc ---------- */
.toc { position: sticky; top: 5rem; }
@media (max-width: 980px) {
  .toc { position: static; }
  .toc__details:not([open]) { padding-bottom: 0; }
}
.toc__details {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-raised);
  padding: 1rem 1.2rem;
}
.toc__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  cursor: pointer;
  list-style: none;
}
.toc__label::-webkit-details-marker { display: none; }
.toc__label::before { content: "// "; color: var(--ink-faint); }
.toc__list {
  list-style: none;
  margin-top: 0.9rem;
  max-height: calc(100vh - 12rem);
  overflow-y: auto;
  scrollbar-width: thin;
}
.toc__item a {
  display: block;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--ink-dim);
  text-decoration: none;
  padding: 0.28rem 0 0.28rem 0.8rem;
  border-left: 2px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}
.toc__item--h3 a { padding-left: 1.8rem; font-size: 0.8rem; color: var(--ink-faint); }
.toc__item a:hover { color: var(--ink); }
.toc__item a.is-active { color: var(--accent); border-left-color: var(--accent); }

/* ---------- prose ---------- */
.prose { min-width: 0; counter-reset: h2; }
.prose > * + * { margin-top: 1.25em; }
.prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  letter-spacing: -0.015em;
  line-height: 1.25;
  scroll-margin-top: 5.5rem;
  text-wrap: balance;
}
.prose h2 {
  font-size: 1.75rem;
  margin-top: 2.6em;
  counter-increment: h2;
}
.prose h2::before {
  content: counter(h2, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}
.prose h3 { font-size: 1.3rem; margin-top: 2em; }
.prose h4 { font-size: 1.1rem; margin-top: 1.8em; }
.prose p { color: var(--ink); }
.prose a { color: var(--accent); text-decoration-color: rgba(198, 242, 78, 0.4); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--accent); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin-top: 0.45em; }
.prose li::marker { color: var(--accent); font-family: var(--font-mono); }
.prose img {
  max-width: 100%; height: auto;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  display: block;
  margin: 1.8rem auto;
}
.prose blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.3rem;
  color: var(--ink-dim);
}
.prose blockquote p { color: inherit; }
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }

/* inline code */
.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.12em 0.4em;
  color: #a8d1ff;
  overflow-wrap: break-word;
}

/* code blocks (shiki dual-theme: force the dark palette) */
.prose pre {
  position: relative;
  background: var(--bg-code) !important;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  line-height: 1.6;
  font-size: 0.85rem;
  scrollbar-width: thin;
}
.prose pre code {
  background: none; border: none; padding: 0;
  font-size: inherit; color: inherit;
  display: block; min-width: max-content;
}
.prose pre.shiki span { color: var(--shiki-dark, #babed8) !important; }

/* pygments (markdown posts) — dark palette matching the shiki material theme */
.prose .highlight pre { color: #babed8; }
.highlight .c, .highlight .c1, .highlight .cm, .highlight .ch, .highlight .cs { color: #546e7a; font-style: italic; }
.highlight .cp, .highlight .cpf { color: #89ddff; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kr, .highlight .kc, .highlight .kp { color: #c792ea; }
.highlight .kt { color: #ffcb6b; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sd, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sa { color: #c3e88d; }
.highlight .se, .highlight .sr { color: #89ddff; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: #f78c6c; }
.highlight .nf, .highlight .fm { color: #82aaff; }
.highlight .nc, .highlight .nn, .highlight .ne { color: #ffcb6b; }
.highlight .nb, .highlight .bp { color: #89ddff; }
.highlight .nt { color: #f07178; }
.highlight .na, .highlight .nd { color: #c792ea; }
.highlight .nv, .highlight .vc, .highlight .vg, .highlight .vi { color: #f07178; }
.highlight .o, .highlight .ow { color: #89ddff; }
.highlight .p { color: #89ddff; }
.highlight .gp { color: #c6f24e; }
.highlight .gd { color: #f07178; }
.highlight .gi { color: #c3e88d; }
.highlight .err { color: inherit; border: none; background: none; }

.copy-btn {
  position: absolute; top: 0.6rem; right: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms ease, color 150ms ease, border-color 150ms ease;
}
.prose pre:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.is-copied { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); opacity: 1; }

/* tables */
.prose table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.9rem;
  scrollbar-width: thin;
}
.prose th, .prose td {
  border: 1px solid var(--line-strong);
  padding: 0.55rem 0.9rem;
  text-align: left;
  vertical-align: top;
}
.prose th {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--bg-raised);
  white-space: nowrap;
}
.prose td { color: var(--ink-dim); }
.prose td code { white-space: nowrap; }

/* tags */
.post__tags {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: flex; gap: 0.5rem 0.7rem; flex-wrap: wrap;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-dim);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
}

/* ---------- post nav ---------- */
.postnav {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 2rem;
}
@media (max-width: 640px) { .postnav { grid-template-columns: 1fr; } }
.postnav__link {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  transition: border-color 160ms ease, background 160ms ease;
}
.postnav__link:hover { border-color: var(--accent); background: var(--bg-raised); }
.postnav__link--prev { text-align: right; }
.postnav__dir {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.postnav__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.3;
}
.postnav__spacer { display: block; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); }
.footer__inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}
.footer__sig { font-family: var(--font-mono); font-size: 0.88rem; margin-bottom: 0.6rem; }
.footer__out { color: var(--ink-dim); }
.footer__meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-faint); }
.footer__meta a { color: var(--ink-dim); text-decoration: none; }
.footer__meta a:hover { color: var(--accent); }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}