/* Broadsheet — design-system tokens and component classes. This file is the source of truth for the system's look; retune it here and see design-handoff/design-system/broadsheet-readme.md. */

/* Source Serif 4, self-hosted. The system ships an @import from Google's
   CDN; this site serves the identical files from its own origin instead —
   one less third-party round trip, and no third-party request from a
   visitor's browser.
   Two faces, which is all the page sets: the roman (weight-variable, so one
   file covers both body 400 and heading 600) and the TRUE italic the pull
   quote needs — a real italic, not a synthesized oblique.

   The two builds differ deliberately, and swapping either one shifts the
   type. Both were chosen to match what the design reference actually
   renders, which is a consequence of how its two font requests resolve
   against each other:
     · ROMAN — no optical-size axis. The reference's heading weight (600)
       matches the system's own wght-only import exactly, which beats the
       optical build's 300-700 range on weight distance, so the reference
       never optically sizes its roman. Substituting the `opsz` build here
       makes browsers apply the default `font-optical-sizing: auto`, which
       at nameplate size picks the display cut, narrows the glyphs ~5% and
       unwraps the masthead from two lines onto one.
     · ITALIC — optical-size axis, left on `auto`. The page sets italic
       only at weight 400, where both requests match equally and the
       optical build wins on declaration order; the reference's pull quote
       is therefore optically sized (36px copy renders at opsz 36).
       Substituting the wght-only italic widens the quote ~9% and re-breaks
       all four of its lines. */
@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('assets/fonts/source-serif-4-latin.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: 'Source Serif 4';
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url('assets/fonts/source-serif-4-italic-latin.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;
}
/* latin-ext — no glyph on the page needs it today; declared (and not
   preloaded) so an edit that adds one still renders in the right face
   instead of falling back to a system serif. */
@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('assets/fonts/source-serif-4-latin-ext.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: 'Source Serif 4';
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url('assets/fonts/source-serif-4-italic-latin-ext.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;
}

:root {
  --color-bg: #f3f2f2;
  --color-surface: #eae9e9;
  --color-text: #201e1d;
  --color-accent: #0088b0;
  --color-accent-2: #d6006c;
  --color-divider: color-mix(in srgb, #201e1d 16%, transparent);

  /* Tonal ramps — generated in OKLCH on one shared lightness scale, so the
     same step of any role matches the others in visual value. */
  --color-neutral-100: #f8f4f4;
  --color-neutral-200: #eae7e7;
  --color-neutral-300: #d7d3d3;
  --color-neutral-400: #bab6b6;
  --color-neutral-500: #9b9797;
  --color-neutral-600: #7d7979;
  --color-neutral-700: #605d5d;
  --color-neutral-800: #444141;
  --color-neutral-900: #2d2b2b;

  --color-accent-100: #e9f8ff;
  --color-accent-200: #cbeeff;
  --color-accent-300: #99e0ff;
  --color-accent-400: #62c5ee;
  --color-accent-500: #38a6cf;
  --color-accent-600: #1186ac;
  --color-accent-700: #006786;
  --color-accent-800: #004961;
  --color-accent-900: #0a303e;

  --color-accent-2-100: #fff1f4;
  --color-accent-2-200: #ffdee6;
  --color-accent-2-300: #ffc0d0;
  --color-accent-2-400: #ff90b1;
  --color-accent-2-500: #ff458e;
  --color-accent-2-600: #d82071;
  --color-accent-2-700: #aa0b56;
  --color-accent-2-800: #790e3d;
  --color-accent-2-900: #4b1528;

  /* The third process ink — the print treatments (the CMYK separation and
     the misregistered plate numerals below) need the full four-color set.
     Cyan and magenta are the system's own accents; this yellow completes
     them, muted to the same press-ink register. A print treatment color,
     not an interface accent — body copy and chrome never take it. */
  --color-process-yellow: #edbb00;

  --font-heading: "Source Serif 4", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Source Serif 4", system-ui, sans-serif;

  --space-1: 5.0px;
  --space-2: 10.0px;
  --space-3: 15.0px;
  --space-4: 20.0px;
  --space-6: 30.0px;
  --space-8: 40.0px;

  --radius-sm: 1px;
  --radius-md: 2px;
  --radius-lg: 4px;

  /* Elevation — derived from the ground: soft ink-tinted shadows on a
     light theme, a hairline edge + ambient darkness on a dark one.
     Unused on this page: it is a flat, printed surface. */
  --shadow-sm: 0 1px 2px color-mix(in srgb, #2d2b2b 14%, transparent);
  --shadow-md: 0 3px 10px color-mix(in srgb, #2d2b2b 16%, transparent);
  --shadow-lg: 0 12px 32px color-mix(in srgb, #2d2b2b 22%, transparent);
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: var(--font-heading-weight); }

.halftone{position:relative;filter:grayscale(0.35) contrast(1.15);overflow:hidden}
.halftone::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle,rgba(0,0,0,0.22) 30%,transparent 32%);
  background-size:3px 3px;mix-blend-mode:multiply}

/* The four-color separation treatment — a photograph printed as its
   misregistered process plates. The plates are extracted live by the SVG
   feColorMatrix filters, which must be real <svg> defs IN the document
   (a data-URI filter reference does not survive Chromium, and
   external-file references are unreliable across engines) — this site
   inlines them at the end of <body> in index.html. */
.cmyk{position:relative;overflow:hidden;background:var(--color-bg)}
.cmyk img:first-child{opacity:0} /* layout sizer AND the alt-bearing image — opacity
  keeps it in the accessibility tree (visibility:hidden would drop the figure's only
  description); fully transparent, it adds nothing to the multiply backdrop */
.cmyk img+img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;mix-blend-mode:multiply}
.cmyk .sep-c{filter:url(#sep-c)}
.cmyk .sep-m{filter:url(#sep-m)}
.cmyk .sep-y{filter:url(#sep-y)}
.cmyk .sep-k{filter:url(#sep-k)}
.cmyk::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle,rgba(0,0,0,0.22) 30%,transparent 32%);
  background-size:3px 3px;mix-blend-mode:multiply}

/* The one-image separation — the same four plates as ONE compound filter,
   #sep-all, for a single swappable image: a .print wrapper inside the
   figure holds the image, and the filter extracts, offsets and multiplies
   the plates live from whatever it shows. Markup:
   figure.cmyk > .print > img (the page sizes the .print — aspect-ratio,
   or absolute fill for bleeds). */
.cmyk .print{position:relative;width:100%;filter:url(#sep-all)}
/* Without the system's press driver (this page does not ship it — the page
   carries no motion beyond smooth scrolling), hover is a single cut to the
   crisp source on exactly the conditions below, and the print holds
   everywhere else. */
@media (hover: hover) and (pointer: fine) {
  .cmyk .print:hover{filter:none}
}
.cmyk .print image-slot{width:100%;height:100%;display:block}

/* The plate numeral — display figures set as misregistered process plates,
   the catalog's cover grammar. THREE plates — C, M, Y only, no black plate
   — so the dark core comes entirely from the C×M×Y multiply overlap (the
   inks product to exact black), with the fringes the registration drift.
   Markup: a .cmyk-num holding a .paper span (the white of the sheet: the
   glyph's union, built from offset text-shadow copies) and three .plate
   spans. The construction carries its own ground (--cmyk-num-ground,
   defaulting to paper) painted on its padding box, so the multiply plates
   always have their backdrop; the padding bleeds wider than any plate
   offset and the negative margin hands the layout box back. Offsets are
   em-scaled to the glyph. The .paper span carries the text once for
   assistive tech; the .plate spans are aria-hidden repeats. */
.cmyk-num{--cmyk-num-ground:var(--color-bg);
  position:relative;width:fit-content;line-height:0.9;
  font-feature-settings:"pnum" 1;
  background:var(--cmyk-num-ground);padding:0.12em;margin:-0.12em}
.cmyk-num .paper{color:var(--color-bg); /* the white of the sheet — always paper,
  whatever the ground: the plates read as printed on paper even when the
  surrounding page is ink */
  text-shadow:0.036em 0.025em 0 var(--color-bg),-0.031em -0.023em 0 var(--color-bg)}
.cmyk-num .plate{position:absolute;inset:0.12em;mix-blend-mode:multiply;
  text-box:trim-both cap alphabetic /* the host trims to its cap box; each
  absolute plate must trim its own line the same way, or its glyphs sit a
  half-leading below the paper union */}
.cmyk-num .plate-c{color:var(--color-accent)}

/* The plate headline — the same three-plate construction as .cmyk-num at
   HALF the numeral's offsets, for display headlines that sit in running
   text blocks on the page's own paper. Unused on this page. */
.cmyk-head{position:relative}
.cmyk-head .paper{color:var(--color-bg);
  text-shadow:0.027em 0.0185em 0 var(--color-bg),-0.0245em -0.0175em 0 var(--color-bg)}
.cmyk-head .plate{position:absolute;inset:0;mix-blend-mode:multiply;
  pointer-events:none;user-select:none;
  text-box:trim-both cap alphabetic}
.cmyk-head .plate-c{color:var(--color-accent)}
.cmyk-head .plate-m{color:var(--color-accent-2);
  translate:calc(0.018em + 0.009em*var(--press-nx, 0)) calc(0.0125em + 0.006em*var(--press-ny, 0))}
.cmyk-head .plate-y{color:var(--color-process-yellow);
  translate:calc(-0.0155em + 0.009em*var(--press-nx, 0)) calc(-0.0115em + 0.006em*var(--press-ny, 0))}
.cmyk-num .plate-m{color:var(--color-accent-2);
  translate:calc(0.036em + 0.018em*var(--press-nx, 0)) calc(0.025em + 0.0125em*var(--press-ny, 0))}
.cmyk-num .plate-y{color:var(--color-process-yellow);
  translate:calc(-0.031em + 0.018em*var(--press-nx, 0)) calc(-0.023em + 0.0125em*var(--press-ny, 0))}
/* --press-nx/--press-ny: the pointer lean as a bare -1..1 factor, published
   on :root by the system's press driver and zero whenever the driver stands
   down. This page does not ship the driver, so both stay at the 0 fallback
   and the plates rest at their registered offsets. */

/* ══════════════════════════════════════════════════════════════════════════
   Components — built with the tokens above. Plain CSS
   on plain HTML: no JavaScript, no build step.
   ══════════════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-size: 15px; line-height: 1.55; font-weight: 400; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
h1 { font-size: 42px; }
h2 { font-size: 32px; }
h3 { font-size: 25px; }
h4 { font-size: 20px; }
h5 { font-size: 16px; }
h6 { font-size: 13px; }
h6 { letter-spacing: 0.08em; text-transform: uppercase; }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }
figure { margin: 0; }
figcaption {
  font-size: 11px; margin-top: var(--space-1);
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

/* — rules — */
.hr {
  height: 1px; border: 0; margin: var(--space-4) 0;
  background: var(--color-divider);
}

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}
.btn svg { display: block; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-ghost:active { background: color-mix(in srgb, var(--color-accent) 18%, transparent); }
.btn-icon { width: 36px; height: 36px; padding: 0; }
.btn-block { width: 100%; margin-top: var(--space-2); }

/* The system's remaining component classes — .card, .tag, .table, .nav,
   the form controls and the dialog — are not used by this page and are not
   shipped here. The complete stylesheet is kept at
   design-handoff/design-system/styles.css; copy a block across from there
   if a later page needs one. Note that .card is a box with a fill, which
   this design deliberately does not use: section separation is whitespace
   only, with no cards, boxes or dividers. */