/* ==========================================================================
   Broadsheet design tokens and component classes.
   Source of truth for the site's look. Retune values here, not in site.css.
   Adapted from the Claude Design "broadsheet" system (see _design-source/).
   ========================================================================== */

:root {
  /* Core roles */
  --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. A print-treatment color only. Body copy and
     chrome never take it. Used by .cmyk-num. */
  --color-process-yellow: #edbb00;

  /* Type */
  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-heading-weight: 600;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;

  /* Space */
  --space-1: 5px;
  --space-2: 10px;
  --space-3: 15px;
  --space-4: 20px;
  --space-6: 30px;
  --space-8: 40px;

  /* Radius */
  --radius-sm: 1px;
  --radius-md: 2px;
  --radius-lg: 4px;

  /* Elevation. Soft ink-tinted shadows on the paper ground. */
  --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);
}

/* ==========================================================================
   Base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

/* The browser's own [hidden] rule is display:none at author-origin strength,
   so any element given display:grid or display:flex would ignore it. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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; letter-spacing: 0.08em; text-transform: uppercase; }

p { margin: 0 0 var(--space-3); }

a { color: var(--color-accent-700); text-underline-offset: 3px; }
a:hover { color: var(--color-accent-900); }

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);
}

: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); }

.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }

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

/* Visible only to assistive technology. */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   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-700); 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-block { width: 100%; margin-top: var(--space-2); }

/* ==========================================================================
   Forms
   ========================================================================== */

.field > label {
  display: block;
  font-size: 12px;
  margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}

.input {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  font: inherit;
  font-size: 14px;
  color: var(--color-text);
  caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
}
/* The browser default gray misses the 4.5:1 small-text bar on the surface
   fill. 65% ink measures 4.8:1 there. opacity:1 overrides Firefox's default
   placeholder fade. */
.input::placeholder {
  color: color-mix(in srgb, var(--color-text) 65%, transparent);
  opacity: 1;
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
textarea.input { min-height: 90px; resize: vertical; }

/* ==========================================================================
   Cards and tags. Unused by the current pages, kept for future sections.
   ========================================================================== */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.card-kicker { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent-700); }
.card-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 17px; line-height: 1.2; }
.card-body { margin: 0; font-size: 13px; opacity: 0.8; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 6px; font-size: 11px; color: color-mix(in srgb, var(--color-text) 50%, transparent); }

.elev-sm { box-shadow: var(--shadow-sm); }
.elev-md { box-shadow: var(--shadow-md); }
.elev-lg { box-shadow: var(--shadow-lg); }

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.02em;
  padding: 3px 10px;
  border-radius: calc(var(--radius-md) * 0.75);
}
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-accent-2 { background: var(--color-accent-2-100); color: var(--color-accent-2-800); }
.tag-neutral { background: var(--color-neutral-100); color: var(--color-neutral-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent-700); }

/* ==========================================================================
   The plate numeral. Display figures set as misregistered process plates.
   Three plates (C, M, Y only, no black): the dark core comes entirely from
   the C x M x Y multiply overlap, with the fringes as registration drift.
   Markup: a .cmyk-num holding a .paper span (the white of the sheet, built
   from offset text-shadow copies) and three aria-hidden .plate spans.
   The construction carries its own ground so the multiply plates always have
   a 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.
   ========================================================================== */

.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;
}
/* Always paper, whatever the ground: the plates read as printed on paper even
   when the surrounding page is ink. */
.cmyk-num .paper {
  color: var(--color-bg);
  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;
  pointer-events: none;
  user-select: none;
}
.cmyk-num .plate-c { color: var(--color-accent); }
.cmyk-num .plate-m { color: var(--color-accent-2); translate: 0.036em 0.025em; }
.cmyk-num .plate-y { color: var(--color-process-yellow); translate: -0.031em -0.023em; }