/* HTMAA 2026 · Nijat Mahamaliyev — dark, monochrome, monospace */

:root {
  --bg: #0b0b0b;
  --bg-2: #141414;
  --line: #232323;
  --line-2: #3a3a3a;
  --fg: #d2d2d2;
  --fg-hi: #f4f4f4;
  --fg-dim: #8a8a8a;
  --fg-faint: #4a4a4a;
  --mono: "IBM Plex Mono", "Courier New", Courier, monospace;
  --side: 300px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.7 var(--mono);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--fg-hi);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
}
a:hover { text-decoration-color: var(--fg-hi); }

::selection { background: var(--fg-hi); color: var(--bg); }

/* --- shell ------------------------------------------------------------- */

.shell {
  display: grid;
  grid-template-columns: var(--side) minmax(0, 1fr);
  min-height: 100vh;
}

.side {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 32px 24px;
  border-right: 1px solid var(--line);
  font-size: 13px;
}

.main {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 920px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 40px clamp(20px, 5vw, 64px) 0;
}

.content { flex: 1; }

/* --- sidebar ----------------------------------------------------------- */

.id { display: block; margin-bottom: 32px; text-decoration: none; }
.id .name { display: block; color: var(--fg-hi); font-size: 15px; font-weight: 600; }
.id .sub { display: block; margin-top: 4px; color: var(--fg-dim); font-size: 12px; line-height: 1.5; }

.menu > summary { display: none; }

.side nav a { color: var(--fg); text-decoration: none; }
.side nav a:hover { color: var(--fg-hi); }

.label {
  margin: 28px 0 8px;
  color: var(--fg-faint);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.primary, .weeks, .toc { list-style: none; margin: 0; padding: 0; }

.primary li { margin: 2px 0; }
.primary .is-current > a { color: var(--fg-hi); }
.primary .is-current > a::before { content: "> "; }

.primary .final > a { color: var(--fg-hi); font-weight: 500; }

.weeks .item {
  display: grid;
  grid-template-columns: 2.4em 1fr auto;
  gap: 0 8px;
  padding: 3px 6px;
  margin: 0 -6px;
  line-height: 1.45;
}
.weeks .num { color: var(--fg-dim); }
.weeks .date { color: var(--fg-faint); }
.weeks .is-draft .item,
.weeks .is-draft .num { color: var(--fg-faint); cursor: default; }
.weeks .is-current > .item { background: var(--bg-2); color: var(--fg-hi); }
.weeks .is-current > .item .num { color: var(--fg-hi); }

.toc {
  margin: 6px 0 10px calc(2.4em + 8px);
  padding-left: 10px;
  border-left: 1px solid var(--line-2);
  font-size: 12px;
}
.toc li { margin: 3px 0; line-height: 1.4; }
.side .toc a { color: var(--fg-dim); }
.side .toc a:hover { color: var(--fg-hi); }

/* --- page head --------------------------------------------------------- */

.prompt { margin: 0 0 32px; color: var(--fg-dim); font-size: 11px; }
.ps1 { color: var(--fg-hi); }

.kicker {
  margin: 0;
  color: var(--fg-dim);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 6px 0 32px;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--line-2);
  color: var(--fg-hi);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 500;
  line-height: 1.25;
}

/* --- home intro -------------------------------------------------------- */

.intro {
  margin: 0 0 40px;
  color: var(--fg);
  font-size: 11px;
}
.intro p { margin: 0; }
.intro .ps1 { color: var(--fg-hi); }
.intro .indent { padding-left: 6ch; }

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 2px;
  background: var(--fg-hi);
  vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.final-card {
  display: block;
  margin: 40px 0 8px;
  padding: 20px 22px;
  border: 1px solid var(--line-2);
  color: var(--fg);
  text-decoration: none;
}
.final-card:hover { border-color: var(--fg-dim); }
.final-card .t { display: block; margin-top: 8px; color: var(--fg-hi); font-size: 17px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 12px;
}

.tile {
  display: block;
  min-height: 104px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  color: var(--fg);
  text-decoration: none;
}
a.tile:hover { border-color: var(--fg-dim); }
.tile .n { display: flex; justify-content: space-between; color: var(--fg-dim); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.tile .t { display: block; margin-top: 10px; color: var(--fg-hi); font-size: 13px; line-height: 1.45; }
.tile.is-draft { border-style: dashed; cursor: default; }
.tile.is-draft .n,
.tile.is-draft .t { color: var(--fg-faint); }

/* --- content ----------------------------------------------------------- */

.content h2 {
  margin: 56px 0 12px;
  color: var(--fg-hi);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.content h3 { margin: 32px 0 8px; color: var(--fg-hi); font-size: 15px; font-weight: 600; }
.content h2, .content h3 { scroll-margin-top: 24px; }

.content p, .content li { max-width: 74ch; }
/* Lists keep the columns typed in the .md (monospace: 1 space = 1ch).
   --i = indent of the first item, --u = indent step of nested items. */
.list { margin-left: calc(var(--i, 0) * 1ch); }
.list.tight { margin-top: -0.8em; }  /* typed right under a text line */
.content ul, .content ol { margin: 0.6em 0 1em; padding-left: 2ch; }
.content ol { padding-left: 3ch; }
.content li { margin: 0.2em 0; }
.content li > ul, .content li > ol { margin: 0.2em 0; padding-left: calc(var(--u, 2) * 1ch); }
.content ul { list-style: "- "; }
.content ul ul { list-style: "· "; }
.content li::marker { color: var(--fg-dim); }

/* extra blank lines in the .md become space: one line-height per extra blank line */
.gap { height: calc(var(--n) * 1.7em - 1em); }

.content code {
  padding: 1px 5px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  font-size: 0.92em;
}
.content pre {
  overflow-x: auto;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.55;
}
.content pre code { padding: 0; background: none; border: 0; }

.content blockquote {
  margin: 24px 0;
  padding-left: 16px;
  border-left: 1px solid var(--line-2);
  color: var(--fg-dim);
}

.content hr { margin: 48px 0; border: 0; border-top: 1px dashed var(--line-2); }

.content table { width: 100%; border-collapse: collapse; font-size: 13px; display: block; overflow-x: auto; }
.content th, .content td { padding: 6px 10px; border-bottom: 1px solid var(--line); text-align: left; }
.content th { color: var(--fg-hi); font-weight: 500; }

/* Media rows: one row per line of images. Each figure grows in proportion to
   its aspect ratio (--r, set by the build), so every image in a row has the
   same height and the row fills the column exactly. Stacked rows sit one
   --gap apart (the negative margin collapses the 32px spacing to --gap). */
.row {
  --gap: 12px;
  display: flex;
  gap: var(--gap);
  margin: 32px 0;
}
.row + .row { margin-top: calc(var(--gap) - 32px); }
.row figure { flex: var(--r) 1 0; min-width: 0; margin: 0; }
.row img, .row video, .row iframe {
  display: block;
  border: 0;
  width: 100%;
  height: auto;
  aspect-ratio: var(--r);
  object-fit: cover;
  background: var(--bg-2);
}
/* a single image is centered and never taller than 75% of the screen */
.row.single { justify-content: center; }
.row.single figure { flex: 0 1 auto; width: min(100%, calc(75vh * var(--r))); }

figcaption { margin-top: 8px; color: var(--fg-dim); font-size: 12px; line-height: 1.5; }
a.lightbox { display: block; cursor: zoom-in; }
.content p img { max-width: 100%; height: auto; }

@media (max-width: 560px) {
  .row { flex-direction: column; }
  .row:not(.single) figure { flex: none; width: 100%; }
}

/* --- pager + footer ---------------------------------------------------- */

.pager {
  display: flex;
  gap: 16px;
  margin-top: 72px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-2);
  font-size: 13px;
}
.pager a { color: var(--fg-dim); text-decoration: none; }
.pager a:hover { color: var(--fg-hi); }
.pager .next { margin-left: auto; }

.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  margin-top: 72px;
  padding: 16px 0 24px;
  border-top: 1px solid var(--line);
  color: var(--fg-dim);
  font-size: 12px;
}
.pager + .foot { margin-top: 24px; }
.foot .who { display: inline-flex; align-items: center; gap: 8px; }
.foot .mark { width: auto; height: 12px; opacity: 0.85; }
.foot .mail { -webkit-user-select: none; user-select: none; }

/* --- lightbox ---------------------------------------------------------- */

.lb {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4vmin;
  background: rgba(0, 0, 0, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  cursor: zoom-out;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.lb.is-open { opacity: 1; }
.lb img { max-width: 100%; max-height: 100%; object-fit: contain; }

/* --- small screens ----------------------------------------------------- */

@media (max-width: 860px) {
  .shell { display: block; }

  .side {
    position: static;
    height: auto;
    padding: 18px 20px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .id { margin-bottom: 12px; }

  .menu > summary {
    display: block;
    color: var(--fg-dim);
    cursor: pointer;
    list-style: none;
  }
  .menu > summary::-webkit-details-marker { display: none; }
  .menu > summary::before { content: "[+] "; }
  .menu[open] > summary::before { content: "[-] "; }

  .main { padding: 28px 20px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  .lb { transition: none; }
}