/* This file owns the Solkei brand book's styles: tokens, base type, sections, logo boards. */
@layer reset, tokens, base, layout, components;

/* Self-hosted fonts (OFL 1.1, from @fontsource 5.3.0 as on solkei.fi): no request leaves for Google. */
@font-face { font-family: 'Host Grotesk'; font-style: normal; font-weight: 300 800; font-display: swap; src: url('fonts/host-grotesk-latin-ext-wght-normal.woff2') format('woff2'); unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }
@font-face { font-family: 'Host Grotesk'; font-style: normal; font-weight: 300 800; font-display: swap; src: url('fonts/host-grotesk-latin-wght-normal.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Geist Mono'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/geist-mono-latin-ext-400-normal.woff2') format('woff2'); unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }
@font-face { font-family: 'Geist Mono'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/geist-mono-latin-400-normal.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Geist Mono'; font-style: normal; font-weight: 500; font-display: swap; src: url('fonts/geist-mono-latin-ext-500-normal.woff2') format('woff2'); unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }
@font-face { font-family: 'Geist Mono'; font-style: normal; font-weight: 500; font-display: swap; src: url('fonts/geist-mono-latin-500-normal.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd, table { margin: 0; }
  ul, ol { padding: 0; }
  img { display: block; max-inline-size: 100%; }
  table { border-collapse: collapse; }
}

@layer tokens {
  :root {
    /* Palette */
    --forest: #103f2f;
    --ink: #0f271f;
    --cream: #f6faf3;
    --copper: #8e5c2b;
    --muted-on-cream: #44574f;   /* 7.3:1 on cream */
    --muted-on-green: #bfd0c6;   /* 7.4:1 on forest */
    --line: rgb(15 39 31 / 0.18);
    --line-on-green: rgb(246 250 243 / 0.24);

    /* Type: candidate A is the working face; swap here after vetting. */
    --font-display: "Host Grotesk", system-ui, sans-serif;
    --font-body: "Host Grotesk", system-ui, sans-serif;
    --font-mono: "Geist Mono", ui-monospace, monospace;

    --measure: 68ch;
    --page: 1160px;
    --gutter: clamp(16px, 4vw, 48px);
    --space-section: clamp(72px, 10vw, 144px);
  }
}

@layer base {
  html { color-scheme: light; }
  body {
    background: var(--cream);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    hyphens: auto;
  }
  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.08;
    color: var(--forest);
    hyphens: manual;
  }
  h2 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
  h3 { font-size: clamp(1.5rem, 2.6vw, 2rem); line-height: 1.15; }
  h4, .h4 { font-size: 1.1875rem; letter-spacing: -0.01em; line-height: 1.25; }
  p, li { max-inline-size: var(--measure); }
  a { color: var(--forest); text-underline-offset: 4px; }
  a:hover { color: var(--copper); }
  :focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }
  strong { font-weight: 600; }
}

@layer layout {
  .wrap { max-inline-size: var(--page); margin-inline: auto; padding-inline: var(--gutter); }
  .chapter { padding-block: var(--space-section); border-block-start: 1px solid var(--line); }
  .chapter > .wrap { display: flex; flex-direction: column; gap: 40px; }
  .chapter__head { display: flex; flex-direction: column; gap: 20px; }
  .stack { display: flex; flex-direction: column; gap: 16px; }
  .grid-2 { display: grid; gap: 32px 48px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
  .grid-3 { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
  .grid-4 { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
}

@layer components {
  /* Labels */
  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--copper);
  }
  .tag {
    display: inline-block;
    padding: 4px 10px;
    border: 1px solid var(--copper);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--copper);
  }
  .lead { font-size: clamp(1.1875rem, 2vw, 1.375rem); line-height: 1.5; }
  .muted { color: var(--muted-on-cream); }
  .note {
    padding: 20px 24px;
    border: 1px dashed var(--ink);
    max-inline-size: 760px;
  }
  .note p + p { margin-block-start: 10px; }

  /* Cover */
  .cover { background: var(--forest); color: var(--cream); }
  .cover .wrap { min-block-size: 520px; display: flex; flex-direction: column; justify-content: space-between; gap: 64px; padding-block: 40px 64px; }
  .cover__top { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
  .cover__top .eyebrow, .cover .eyebrow { color: var(--muted-on-green); }
  .cover h1 { color: var(--cream); font-size: clamp(3rem, 9vw, 7.5rem); line-height: 0.98; letter-spacing: -0.035em; }
  .cover__lede { color: var(--cream); font-size: clamp(1.1875rem, 2vw, 1.5rem); max-inline-size: 40ch; }
  .cover__status { display: flex; flex-direction: column; gap: 8px; padding-block-start: 20px; border-block-start: 1px solid var(--line-on-green); color: var(--muted-on-green); font-size: 0.9375rem; }
  .cover__status strong { color: var(--cream); }
  .cover a { color: var(--cream); }

  /* Table of contents */
  .toc ol { list-style: none; display: grid; gap: 0 48px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); counter-reset: toc; }
  .toc li { border-block-start: 1px solid var(--line); max-inline-size: none; }
  .toc a { display: flex; gap: 20px; align-items: baseline; padding-block: 16px; text-decoration: none; font-size: 1.1875rem; font-weight: 500; }
  .toc a::before { counter-increment: toc; content: counter(toc, decimal-leading-zero); font-family: var(--font-mono); font-size: 0.8125rem; color: var(--copper); }

  /* Message blocks */
  .quote {
    padding: 28px 32px;
    background: var(--forest);
    color: var(--cream);
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.2vw, 1.625rem);
    line-height: 1.35;
    letter-spacing: -0.01em;
    hyphens: manual;
  }
  .quote .eyebrow { color: var(--muted-on-green); margin-block-end: 14px; font-family: var(--font-mono); }
  .quote--light { background: transparent; color: var(--forest); border: 1px solid var(--forest); }
  .quote--light .eyebrow { color: var(--copper); }

  /* Tables */
  .table-wrap { overflow-x: auto; }
  .spec { inline-size: 100%; min-inline-size: 640px; }
  .spec caption { text-align: start; padding-block-end: 16px; }
  .spec th, .spec td { text-align: start; vertical-align: top; padding: 18px 24px 18px 0; border-block-start: 1px solid var(--line); }
  .spec thead th { font-family: var(--font-mono); font-weight: 400; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted-on-cream); padding-block: 0 12px; border: 0; }
  .spec tbody th { font-family: var(--font-display); font-weight: 600; font-size: 1.1875rem; line-height: 1.3; color: var(--forest); inline-size: 34%; }
  .spec .en-msg { font-weight: 600; color: var(--forest); margin-block-end: 8px; }
  .spec ul { padding-inline-start: 18px; display: flex; flex-direction: column; gap: 8px; }

  /* Tone rules + examples */
  .rules { list-style: none; counter-reset: rule; display: grid; gap: 0 48px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
  .rules li { display: flex; gap: 16px; padding-block: 16px; border-block-start: 1px solid var(--line); max-inline-size: none; }
  .rules li::before { counter-increment: rule; content: counter(rule); flex: 0 0 24px; font-family: var(--font-mono); font-size: 0.8125rem; color: var(--copper); padding-block-start: 4px; }
  .compare { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); }
  .compare > div { padding: 20px 24px; border: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; }
  .compare .yes { border-color: var(--forest); }
  .compare .label { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted-on-cream); }
  .compare .yes .label { color: var(--forest); }
  .compare .no p { text-decoration: line-through; text-decoration-color: var(--copper); text-decoration-thickness: 1px; color: var(--muted-on-cream); }

  /* Logo candidates */
  .cand { display: flex; flex-direction: column; gap: 20px; padding-block: 56px; border-block-start: 1px solid var(--line); }
  .cand__head { display: grid; grid-template-columns: auto 1fr; gap: 4px 20px; align-items: baseline; }
  .cand__id { grid-row: span 2; font-family: var(--font-mono); font-size: 2.5rem; line-height: 1; color: var(--copper); }
  .grounds { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
  .ground { aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 14%; }
  .ground img { max-block-size: 100%; inline-size: auto; object-fit: contain; }
  .ground--wide { padding: 16% 10%; }
  .ground--forest { background: var(--forest); }
  .ground--ink { background: var(--ink); }
  .ground--cream { background: var(--cream); border: 1px solid var(--line); }
  .ground--bare { padding: 6%; background: var(--cream); border: 1px solid var(--line); }
  .ground figcaption, .sizes figcaption { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; }
  .grounds figure { display: flex; flex-direction: column; gap: 8px; }
  .grounds figcaption { color: var(--muted-on-cream); }
  .sizes-row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
  .sizes { display: flex; align-items: flex-end; gap: 28px; flex-wrap: wrap; padding: 24px; }
  .sizes--forest { background: var(--forest); color: var(--muted-on-green); }
  .sizes--cream { border: 1px solid var(--line); color: var(--muted-on-cream); }
  .sizes figure { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
  .sizes img { inline-size: auto; }
  .s64 { block-size: 64px; }
  .s32 { block-size: 32px; }
  .s24 { block-size: 24px; }
  .s16 { block-size: 16px; }

  /* Side-by-side comparison */
  .lineup { display: grid; gap: 1px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); background: var(--line-on-green); border: 1px solid var(--forest); }
  .lineup figure { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 16px; padding: 28px 12px 16px; background: var(--forest); color: var(--muted-on-green); }
  .lineup--cream { background: var(--line); border-color: var(--line); }
  .lineup--cream figure { background: var(--cream); color: var(--muted-on-cream); }
  .lineup .pair { display: flex; align-items: flex-end; gap: 20px; }
  .lineup figcaption { font-family: var(--font-mono); font-size: 0.8125rem; }
  .header-demo { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .header-demo > div { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 20px; background: var(--cream); }
  .header-demo img { block-size: 44px; inline-size: auto; }
  .header-demo img.wide { block-size: 36px; }
  .header-demo span { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--muted-on-cream); }

  /* Colour */
  .swatch { display: flex; flex-direction: column; gap: 12px; }
  .swatch__chip { aspect-ratio: 4 / 3; display: flex; align-items: flex-end; padding: 16px; font-family: var(--font-mono); font-size: 0.875rem; }
  .swatch dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; font-size: 0.9375rem; }
  .swatch dt { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted-on-cream); padding-block-start: 3px; }
  .chip--forest { background: var(--forest); color: var(--cream); }
  .chip--ink { background: var(--ink); color: var(--cream); }
  .chip--cream { background: var(--cream); color: var(--ink); border: 1px solid var(--line); }
  .chip--copper { background: var(--copper); color: var(--cream); }
  .contrast td:nth-child(2) { font-family: var(--font-mono); }
  .fail { color: var(--copper); font-weight: 600; }

  /* Type specimens */
  .specimen { display: flex; flex-direction: column; gap: 18px; padding-block: 40px; border-block-start: 1px solid var(--line); }
  .specimen__display { font-weight: 600; font-size: clamp(2.5rem, 6vw, 4.5rem); line-height: 1; letter-spacing: -0.03em; color: var(--forest); }
  .specimen__sub { font-weight: 600; font-size: clamp(1.375rem, 2.6vw, 2rem); line-height: 1.15; letter-spacing: -0.015em; color: var(--forest); }
  .specimen__body { font-size: 1.0625rem; max-inline-size: 62ch; }
  .specimen__mono { font-size: 0.875rem; letter-spacing: 0.04em; color: var(--muted-on-cream); }
  .pair-a { font-family: "Host Grotesk", system-ui, sans-serif; }
  .pair-a .specimen__mono { font-family: "Geist Mono", ui-monospace, monospace; }

  /* Roadmap + footer */
  .next { list-style: none; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
  .next li { padding: 20px 24px; border: 1px solid var(--line); max-inline-size: none; display: flex; flex-direction: column; gap: 6px; }
  .colophon { background: var(--ink); color: var(--muted-on-green); padding-block: 56px; font-size: 0.9375rem; }
  .colophon .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
  .colophon strong { color: var(--cream); }
}