/* ==========================================================================
   Halo — an editorial theme for Counterglow.
   Serif display type, an asymmetric feature grid, generous white space.
   One file, no framework, ~9 KB.
   ========================================================================== */

@layer reset, tokens, base, layout, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  }
  img, svg, video, iframe { display: block; max-width: 100%; height: auto; }
  input, button, textarea, select { font: inherit; color: inherit; }
  button { cursor: pointer; background: none; border: 0; }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
}

@layer tokens {
  :root {
    color-scheme: light dark;

    --font-display: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
    --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;

    --accent: oklch(0.55 0.19 25);          /* warm ink red */
    --paper: oklch(0.985 0.008 85);
    --paper-2: oklch(0.955 0.012 85);
    --rule: oklch(0.87 0.012 85);
    --ink: oklch(0.19 0.014 60);
    --ink-soft: oklch(0.47 0.014 60);

    --measure: 33rem;
    --gutter: clamp(1.15rem, 5vw, 3rem);
    --wide: 78rem;
    --ease: cubic-bezier(0.32, 0.72, 0, 1);

    --step--1: clamp(0.82rem, 0.8rem + 0.1vw, 0.88rem);
    --step-0:  clamp(1.02rem, 0.98rem + 0.2vw, 1.15rem);
    --step-1:  clamp(1.25rem, 1.15rem + 0.45vw, 1.55rem);
    --step-2:  clamp(1.6rem, 1.4rem + 0.95vw, 2.3rem);
    --step-3:  clamp(2rem, 1.6rem + 1.9vw, 3.4rem);
    --step-4:  clamp(2.6rem, 1.85rem + 3.6vw, 5.4rem);
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --paper: oklch(0.17 0.012 60);
      --paper-2: oklch(0.21 0.014 60);
      --rule: oklch(0.32 0.014 60);
      --ink: oklch(0.94 0.008 60);
      --ink-soft: oklch(0.7 0.014 60);
      --accent: oklch(0.72 0.16 32);
    }
  }
  :root[data-theme="dark"] {
    --paper: oklch(0.17 0.012 60);
    --paper-2: oklch(0.21 0.014 60);
    --rule: oklch(0.32 0.014 60);
    --ink: oklch(0.94 0.008 60);
    --ink-soft: oklch(0.7 0.014 60);
    --accent: oklch(0.72 0.16 32);
  }
}

@layer base {
  body {
    font-family: var(--font-body);
    font-size: var(--step-0);
    line-height: 1.6;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
  }
  h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.02em;
    text-wrap: balance;
  }
  p, li { text-wrap: pretty; }
  a { color: inherit; text-underline-offset: 0.16em; }
  ::selection { background: color-mix(in oklab, var(--accent) 25%, transparent); }
  hr { border: 0; height: 1px; background: var(--rule); }
  code { font-family: var(--font-mono); font-size: 0.88em; }
}

@layer layout {
  .container { width: min(100% - var(--gutter) * 2, var(--wide)); margin-inline: auto; }
  .container--narrow { width: min(100% - var(--gutter) * 2, 44rem); margin-inline: auto; }
  .section { padding-block: clamp(3rem, 8vw, 6rem); }
}

@layer components {
  /* --- masthead ---------------------------------------------------------- */
  .masthead { border-bottom: 1px solid var(--ink); }
  .masthead__top {
    display: flex; align-items: baseline; gap: 1.5rem;
    padding-block: 1.1rem 0.9rem;
  }
  .masthead__title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.1rem);
    font-weight: 600; letter-spacing: -0.035em; text-decoration: none;
  }
  .masthead__date {
    font-size: var(--step--1); color: var(--ink-soft);
    font-variant-numeric: tabular-nums; letter-spacing: 0.04em; text-transform: uppercase;
  }
  .masthead__nav {
    display: flex; gap: 1.4rem; align-items: center; margin-left: auto; flex-wrap: wrap;
  }
  .masthead__nav a {
    font-size: var(--step--1); text-decoration: none; color: var(--ink-soft);
    letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600;
    padding-bottom: 2px; border-bottom: 2px solid transparent;
  }
  .masthead__nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
  .masthead__nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }
  .icon-btn { display: grid; place-items: center; width: 2rem; height: 2rem; color: var(--ink-soft); border-radius: 50%; }
  .icon-btn:hover { background: var(--paper-2); color: var(--ink); }

  /* --- lead story -------------------------------------------------------- */
  .lead-grid {
    display: grid; gap: clamp(1.5rem, 4vw, 3rem);
    grid-template-columns: minmax(0, 1fr);
    padding-block: clamp(2rem, 5vw, 3.5rem);
    border-bottom: 1px solid var(--rule);
  }
  @media (min-width: 55rem) {
    .lead-grid { grid-template-columns: 1.55fr minmax(0, 1fr); align-items: start; }
  }
  .lead__kicker {
    font-size: var(--step--1); font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--accent); margin-bottom: 0.9rem;
  }
  .lead__title { font-size: var(--step-4); margin-bottom: 1rem; }
  .lead__intro { font-size: var(--step-1); color: var(--ink-soft); max-width: var(--measure); }
  .lead__aside { border-top: 1px solid var(--rule); padding-top: 1.5rem; }
  @media (min-width: 55rem) {
    .lead__aside {
      border-top: 0; padding-top: 0;
      border-left: 1px solid var(--rule); padding-left: clamp(1rem, 2.5vw, 2rem);
    }
  }
  .lead__aside h2 {
    font-family: var(--font-body); font-size: var(--step--1); font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft);
    padding-bottom: 0.6rem; border-bottom: 2px solid var(--ink); margin-bottom: 1rem;
  }

  /* --- article rail (numbered list) -------------------------------------- */
  .rail { list-style: none; padding: 0; display: grid; gap: 1.1rem; counter-reset: rail; }
  .rail li { counter-increment: rail; display: grid; grid-template-columns: 1.6rem 1fr; gap: 0.75rem; }
  .rail li::before {
    content: counter(rail, decimal-leading-zero);
    font: 700 var(--step--1)/1.5 var(--font-mono); color: var(--accent);
  }
  .rail a { text-decoration: none; font-family: var(--font-display); font-size: var(--step-0); font-weight: 600; line-height: 1.25; }
  .rail a:hover { color: var(--accent); }
  .rail .meta { display: block; font-size: var(--step--1); color: var(--ink-soft); margin-top: 0.15rem; font-family: var(--font-body); font-weight: 400; }

  /* --- feature cards ----------------------------------------------------- */
  .features { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); grid-template-columns: repeat(auto-fill, minmax(min(17rem, 100%), 1fr)); }
  .feature { display: grid; gap: 0.7rem; text-decoration: none; }
  .feature__media { overflow: hidden; background: var(--paper-2); aspect-ratio: 3 / 2; }
  .feature__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease), filter .4s; filter: saturate(0.92); }
  .feature:hover .feature__media img { transform: scale(1.04); filter: saturate(1.05); }
  .feature__kicker { font-size: var(--step--1); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
  .feature__title { font-family: var(--font-display); font-size: var(--step-1); font-weight: 600; line-height: 1.18; }
  .feature:hover .feature__title { text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; }
  .feature__excerpt { font-size: var(--step--1); color: var(--ink-soft); }

  .section-head {
    display: flex; align-items: baseline; gap: 1rem;
    padding-bottom: 0.6rem; margin-bottom: 1.8rem; border-bottom: 2px solid var(--ink);
  }
  .section-head h2 {
    font-family: var(--font-body); font-size: var(--step--1); font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
  }
  .section-head a { margin-left: auto; font-size: var(--step--1); color: var(--ink-soft); text-decoration: none; }
  .section-head a:hover { color: var(--accent); }

  /* --- index list -------------------------------------------------------- */
  .entries { list-style: none; padding: 0; }
  .entry { display: grid; gap: 0.4rem; padding-block: clamp(1.4rem, 3vw, 2rem); border-top: 1px solid var(--rule); }
  .entry:last-child { border-bottom: 1px solid var(--rule); }
  @media (min-width: 48rem) {
    .entry { grid-template-columns: 9rem 1fr; column-gap: 2rem; }
    .entry__meta { grid-row: span 3; }
  }
  .entry a { text-decoration: none; }
  .entry__title { font-size: var(--step-2); }
  .entry:hover .entry__title { color: var(--accent); }
  .entry__meta { font-size: var(--step--1); color: var(--ink-soft); letter-spacing: 0.04em; }
  .entry__excerpt { color: var(--ink-soft); max-width: var(--measure); }

  /* --- article ----------------------------------------------------------- */
  .article-head { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.2rem, 3vw, 2rem); text-align: center; }
  .article-head h1 { font-size: var(--step-3); max-width: 22ch; margin-inline: auto; }
  .article-head .kicker { font-size: var(--step--1); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
  .article-meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.75rem; font-size: var(--step--1); color: var(--ink-soft); margin-top: 1.25rem; }
  .article-cover { margin-block: clamp(1.5rem, 4vw, 2.5rem); }

  .prose { font-size: var(--step-0); }
  .prose > * + * { margin-top: 1.3em; }
  .prose > p, .prose > ul, .prose > ol, .prose > blockquote { max-width: var(--measure); margin-inline: auto; }
  .prose > h2, .prose > h3 { max-width: var(--measure); margin-inline: auto; margin-top: 2.2em; }
  .prose > h2 { font-size: var(--step-2); }
  .prose > h3 { font-size: var(--step-1); }
  /* the drop cap that makes an editorial theme an editorial theme */
  .prose > p:first-of-type::first-letter {
    float: left; font-family: var(--font-display); font-size: 3.6em; line-height: 0.82;
    padding-right: 0.1em; padding-top: 0.04em; color: var(--accent); font-weight: 600;
  }
  .prose ul, .prose ol { padding-left: 1.25em; display: grid; gap: 0.35em; }
  .prose li::marker { color: var(--accent); }
  .prose li.task { list-style: none; margin-left: -1.25em; }
  .prose a { text-decoration: underline; text-decoration-color: color-mix(in oklab, var(--accent) 55%, transparent); }
  .prose blockquote {
    border: 0; text-align: center; font-family: var(--font-display);
    font-size: var(--step-2); line-height: 1.25; color: var(--ink);
    padding-block: 0.6em; max-width: 30rem;
  }
  .prose blockquote::before { content: "“"; display: block; font-size: 2em; line-height: 0.5; color: var(--accent); margin-bottom: 0.2em; }
  .prose code { background: var(--paper-2); padding: 0.14em 0.36em; border-radius: 3px; }
  .prose pre {
    max-width: 52rem; margin-inline: auto; background: var(--paper-2);
    border-left: 3px solid var(--accent); padding: 1rem 1.2rem; overflow-x: auto;
    font-size: 0.84rem; line-height: 1.6;
  }
  .prose pre code { background: none; padding: 0; }
  .prose figure { margin-block: 2.2em; }
  .prose figcaption { margin-top: 0.6rem; font-size: var(--step--1); color: var(--ink-soft); max-width: var(--measure); margin-inline: auto; font-style: italic; }
  .prose .callout {
    max-width: var(--measure); margin-inline: auto; background: var(--paper-2);
    border-left: 3px solid var(--accent); padding: 1rem 1.2rem; font-size: var(--step--1);
  }
  .table-scroll { overflow-x: auto; max-width: 52rem; margin-inline: auto; }
  .prose table { border-collapse: collapse; width: 100%; font-size: var(--step--1); }
  .prose th, .prose td { text-align: left; padding: 0.55rem 0.8rem; border-bottom: 1px solid var(--rule); }
  .prose th { font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.78em; }
  .gallery { display: grid; grid-template-columns: repeat(var(--cols, 3), 1fr); gap: 0.6rem; margin-block: 2.2em; }
  .gallery img { width: 100%; aspect-ratio: 1; object-fit: cover; }
  .embed { position: relative; aspect-ratio: 16 / 9; background: var(--paper-2); max-width: 52rem; margin-inline: auto; }
  .embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
  .file-link { display: inline-flex; gap: .5rem; align-items: baseline; padding: .35rem .8rem; border: 1px solid var(--rule); text-decoration: none; font-size: var(--step--1); }

  .tag {
    display: inline-block; padding: 0.1rem 0.55rem; font-size: var(--step--1);
    text-decoration: none; color: var(--ink-soft); border: 1px solid var(--rule);
    letter-spacing: 0.04em; text-transform: uppercase; font-weight: 600;
  }
  .tag:hover { border-color: var(--accent); color: var(--accent); }

  .pager { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr)); margin-top: 3.5rem; padding-top: 1.5rem; border-top: 2px solid var(--ink); }
  .pager a { display: grid; gap: 0.2rem; text-decoration: none; }
  .pager span { font-size: var(--step--1); color: var(--ink-soft); letter-spacing: 0.08em; text-transform: uppercase; }
  .pager strong { font-family: var(--font-display); font-weight: 600; font-size: var(--step-1); line-height: 1.15; }
  .pager a:hover strong { color: var(--accent); }
  .pager .next { text-align: right; }

  /* --- colophon ---------------------------------------------------------- */
  .colophon { border-top: 2px solid var(--ink); margin-top: clamp(3rem, 7vw, 5rem); padding-block: 2.5rem 3.5rem; }
  .colophon__inner { display: flex; flex-wrap: wrap; gap: 2rem; align-items: baseline; }
  .colophon a { color: var(--ink-soft); text-decoration: none; font-size: var(--step--1); }
  .colophon a:hover { color: var(--accent); }
  .colophon nav { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-left: auto; }

  dialog.search {
    width: min(34rem, 92vw); padding: 0; border: 1px solid var(--ink); background: var(--paper); color: var(--ink); margin-top: 12vh;
  }
  dialog.search::backdrop { background: oklch(0.2 0.02 60 / 0.45); }
  dialog.search input { width: 100%; padding: 1rem 1.1rem; border: 0; border-bottom: 1px solid var(--rule); background: none; font-size: 1.05rem; font-family: var(--font-display); }
  dialog.search input:focus { outline: none; }
  dialog.search ul { list-style: none; margin: 0; padding: 0.35rem; max-height: 58vh; overflow-y: auto; }
  dialog.search a { display: grid; gap: 0.1rem; padding: 0.6rem 0.75rem; text-decoration: none; }
  dialog.search a:hover, dialog.search li.is-active a { background: var(--paper-2); }
  dialog.search .r-title { font-family: var(--font-display); font-weight: 600; }
  dialog.search .r-excerpt { font-size: var(--step--1); color: var(--ink-soft); }
  dialog.search .hint { padding: 1.5rem; text-align: center; color: var(--ink-soft); font-size: var(--step--1); }

  .js .reveal { opacity: 0; transform: translateY(0.7rem); transition: opacity .55s var(--ease), transform .55s var(--ease); }
  .reveal.is-in { opacity: 1; transform: none; }
  @media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

  /* --- mobile menu ------------------------------------------------------- */
  .masthead__top { position: relative; }
  .nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 2.5rem; height: 2.5rem; padding: .55rem; margin-left: .1rem; background: none; border: 0; cursor: pointer; color: inherit; }
  .nav-toggle span { display: block; height: 2px; width: 100%; background: currentColor; transition: transform .28s var(--ease, ease), opacity .2s; }
  [data-nav-open] .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  [data-nav-open] .nav-toggle span:nth-child(2) { opacity: 0; }
  [data-nav-open] .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .menu-links { display: none; }
  [data-nav-open] .menu-links { display: flex; flex-direction: column; align-items: stretch; position: absolute; top: 100%; left: 0; right: 0; z-index: 40; background: var(--bg, var(--surface, Canvas)); border-block: 1px solid var(--line, color-mix(in oklab, currentColor 16%, transparent)); padding: .4rem var(--gutter, 1.25rem) 1rem; }
  [data-nav-open] .menu-links a { padding: .85rem .2rem; font-size: 1.15rem; border-bottom: 1px solid var(--line, color-mix(in oklab, currentColor 12%, transparent)); }
  [data-nav-open] .menu-links a:last-child { border-bottom: 0; }
  @media (min-width: 48rem) {
    .nav-toggle { display: none; }
    .menu-links { display: flex; align-items: center; gap: .25rem; }
    [data-nav-open] .menu-links { position: static; background: none; border: 0; padding: 0; }
    [data-nav-open] .menu-links a { padding: 0; font-size: inherit; border: 0; }
  }

  .skip { position: absolute; left: .5rem; top: -4rem; z-index: 100; padding: .6rem 1rem; background: var(--ink); color: var(--paper); transition: top .2s; }
  .skip:focus { top: .5rem; }
}

@layer utilities {
  .muted { color: var(--ink-soft); }
  .small { font-size: var(--step--1); }
  .mono { font-family: var(--font-mono); }
  .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
}