/* ============================================================
   Findings — Shared Design Tokens & Base Styles
   ------------------------------------------------------------
   Editorial scrollytelling for Hands in Jars findings pieces.
   Each piece can override --accent and override any specific
   selector via its own styles.css (loaded after this file).

   Hierarchy (load order):
     1. findings-base.css          (this file — tokens + base)
     2. <piece>/styles.css         (piece-specific overrides)

   Documented at docs/interactive-findings/STYLE.md
   ============================================================ */

:root {
  /* ====== TYPOGRAPHY ====== */
  --font-display: "Fraunces", "Source Serif Pro", Georgia, serif;
  --font-body:    "Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", Menlo, ui-monospace, monospace;

  /* Type scale — perfect fourth (1.333), capped at step-6 for hero moments */
  --step--1: 0.875rem;    /* fine print, captions */
  --step-0:  1.0625rem;   /* body */
  --step-1:  1.333rem;    /* dek / lede */
  --step-2:  1.777rem;    /* h3 */
  --step-3:  2.369rem;    /* h2 */
  --step-4:  3.157rem;    /* h1 / hero number small */
  --step-5:  4.209rem;    /* article title */
  --step-6:  5.611rem;    /* big hero number */

  /* Line heights */
  --leading-tight:  1.12;
  --leading-snug:   1.3;
  --leading-normal: 1.55;
  --leading-loose:  1.72;

  /* ====== COLOR ====== */
  /* Editorial neutrals — warm off-white, dark gray ink */
  --paper:        #fafaf7;
  --paper-deep:   #f3f1ea;
  --ink:          #1a1a1a;
  --ink-soft:     #3a3a3a;
  --ink-muted:    #6b6b6b;
  --ink-faint:    #999;
  --rule:         #e5e5e0;
  --rule-strong:  #cccccc;

  /* Accent — overridden per-piece in shell template's accent_color block */
  --accent:       #c8553d;     /* warm rust */
  --accent-dark:  #8b3a28;
  --accent-soft:  #f4ddd6;

  /* Semantic */
  --good:    #2d7a3e;
  --warn:    #c98a13;
  --bad:     #b03a2e;

  /* Status surfaces — soft fills for transparency-rubric pills, etc.
     Added 2026-05-17 alongside the v0.1 transparency rubric color states. */
  --good-soft: #e3efe5;
  --warn-soft: #faecd0;

  /* ====== SPACING & LAYOUT ====== */
  --measure:        66ch;        /* ideal reading width */
  --measure-narrow: 52ch;        /* for emphasized passages */
  --measure-wide:   85ch;
  --gutter:         clamp(1rem, 4vw, 2rem);

  /* Vertical rhythm */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 5rem;     /* section-rhythm vertical margin (was 6.5rem) */
  --space-7: 8rem;     /* page-wrapper level rhythm (was 10rem) */

  /* ====== EFFECTS ====== */
  --transition-fast:   120ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 320ms cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-soft:       0 1px 2px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
}

/* ============================================================
   RESET / BASELINE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: var(--leading-normal);
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg, video, canvas { max-width: 100%; height: auto; display: block; }

/* ============================================================
   TOP BAR + FOOTER
   ============================================================ */
.findings-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem var(--gutter);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(250, 250, 247, 0.92);
}
.findings-topbar a {
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}
.findings-topbar a:hover { color: var(--accent); }
.findings-topbar-home span { font-weight: 700; margin-right: 0.25em; }

.findings-footer {
  margin-top: var(--space-7);
  padding: var(--space-5) var(--gutter);
  border-top: 1px solid var(--rule);
  background: var(--paper-deep);
}
.findings-footer-inner {
  max-width: var(--measure);
  margin: 0 auto;
  font-size: var(--step--1);
  color: var(--ink-muted);
  line-height: var(--leading-loose);
}
.findings-byline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--step-0);
  color: var(--ink-soft);
  margin: 0 0 var(--space-2);
}
.findings-meta a { color: var(--accent-dark); }

/* ============================================================
   ARTICLE: structural pieces every findings article uses
   ============================================================ */
.findings-piece {
  display: block;
  max-width: 100vw;
  /* `clip` clips visually without creating a new containing block — preserves
     `position: sticky` behavior for descendants like the bond scrolly chart.
     Do not change back to `hidden` without restructuring the scrollytelling. */
  overflow-x: clip;
}

/* Hero — first scroll-stop. Designed to land big. */
.f-hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-5) var(--gutter) var(--space-6);
  max-width: var(--measure-wide);
  margin: 0 auto;
}
.f-hero__eyebrow {
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-3);
}
.f-hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 144;
  font-size: clamp(2.5rem, 7vw, var(--step-5));
  line-height: var(--leading-tight);
  letter-spacing: -0.022em;
  margin: 0 0 var(--space-3);
  color: var(--ink);
}
.f-hero__dek {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.125rem, 2.5vw, var(--step-2));
  line-height: var(--leading-snug);
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0;
}
.f-hero__byline {
  margin-top: var(--space-4);
  font-size: var(--step--1);
  color: var(--ink-muted);
  letter-spacing: 0.03em;
}

/* Article body sections (text-only, narrow measure) */
.f-section {
  max-width: var(--measure);
  margin: var(--space-6) auto;
  padding: 0 var(--gutter);
}
.f-section--wide { max-width: var(--measure-wide); }
.f-section--wide > p,
.f-section--wide > h2,
.f-section--wide > h3,
.f-section--wide > ol,
.f-section--wide > ul { max-width: var(--measure); }
.f-section h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 72;
  font-size: clamp(1.75rem, 4vw, var(--step-3));
  line-height: var(--leading-tight);
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 var(--space-3);
}
.f-section h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 36;
  font-size: var(--step-2);
  line-height: var(--leading-snug);
  color: var(--ink);
  margin: var(--space-4) 0 var(--space-2);
}
.f-section p {
  font-size: var(--step-0);
  line-height: var(--leading-loose);
  color: var(--ink-soft);
  margin: 0 0 var(--space-3);
}
.f-section p:first-of-type::first-line {
  font-variant: small-caps;
  letter-spacing: 0.04em;
}
.f-section a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}
.f-section a:hover { color: var(--accent); }

/* Pull-quote / emphasis block */
.f-pullquote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144;
  font-size: var(--step-2);
  line-height: var(--leading-snug);
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  margin: var(--space-4) 0;
}

/* Big number / stat moment */
.f-stat {
  text-align: center;
  margin: var(--space-5) auto;
  max-width: var(--measure-narrow);
}
.f-stat__number {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 144;
  font-size: clamp(3rem, 12vw, var(--step-6));
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.04em;
  display: block;
}
.f-stat__label {
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  margin-top: var(--space-2);
  display: block;
}

/* Fast-facts strip — compact secondary stats below a hero or section.
   Number is the primary glyph; label is small + muted. Responsive grid:
   ~3-6 cols on desktop, 2 on tablet, 1 on mobile. */
.f-fastfacts {
  max-width: 1080px;
  margin: var(--space-3) auto var(--space-5);
  padding: var(--space-3) var(--gutter);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-3);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.f-fastfact { display: block; min-width: 0; }
.f-fastfact__value {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 72;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-feature-settings: "tnum", "kern";
  font-variant-numeric: tabular-nums;
  display: block;
}
.f-fastfact__label {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin-top: 0.25rem;
  letter-spacing: 0.01em;
  display: block;
  line-height: var(--leading-snug);
}
@media (max-width: 1024px) {
  .f-fastfacts { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .f-fastfacts { grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
}
@media (max-width: 420px) {
  .f-fastfacts { grid-template-columns: 1fr; }
}

/* Question / callout card row — 3-up grid of equal-height cards.
   Used for citizen-question sections, action lists, etc. */
.f-card-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}
.f-card-row > li, .f-card-row > .f-question-card {
  background: var(--paper-deep);
  border-left: 3px solid var(--accent);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.f-question-card__lead {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 36;
  font-size: var(--step-1);
  line-height: var(--leading-snug);
  color: var(--ink);
  letter-spacing: -0.01em;
}
.f-question-card__index {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--accent-dark);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.15rem;
}
.f-question-card__body {
  font-family: var(--font-body);
  font-size: var(--step-0);
  color: var(--ink-soft);
  line-height: var(--leading-loose);
  margin: 0;
}
.f-question-card__body::first-line { font-variant: normal; letter-spacing: 0; }
@media (max-width: 768px) {
  .f-card-row { grid-template-columns: 1fr; }
}

/* Download cards — variant of f-card-row used in §9 "Cite this work" */
.f-card-row.f-downloads > .f-download-card {
  background: var(--paper-deep);
  border-left: 3px solid var(--accent);
  padding: 0;
  display: flex;
  flex-direction: column;
}
.f-section .f-download-card__link,
.f-download-card__link {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: var(--space-3);
  color: var(--ink);
  text-decoration: none;
  border: 0;
  transition: background 160ms ease, transform 160ms ease;
  height: 100%;
}
.f-section .f-download-card__link,
.f-section .f-download-card__link:hover { text-decoration: none; }
.f-download-card__link:hover .f-download-card__title {
  color: var(--accent-dark);
}
.f-download-card__link:hover,
.f-download-card__link:focus-visible {
  background: var(--accent-soft);
  transform: translateY(-1px);
  outline: none;
}
.f-download-card__link:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
}
.f-download-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--paper);
  color: var(--accent-dark);
  margin-bottom: 0.25rem;
  border: 1px solid var(--rule);
}
.f-download-card__link:hover .f-download-card__icon,
.f-download-card__link:focus-visible .f-download-card__icon {
  background: var(--accent);
  color: var(--paper);
  border-color: var(--accent);
}
.f-download-card__kicker {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--accent-dark);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.f-download-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 36;
  font-size: var(--step-1);
  line-height: var(--leading-snug);
  color: var(--ink);
  letter-spacing: -0.01em;
}
.f-download-card__meta {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--ink-muted);
  line-height: var(--leading-loose);
}

/* Chart container — full-bleed or contained variants */
.f-chart {
  margin: var(--space-5) auto;
  padding: 0 var(--gutter);
  max-width: var(--measure-wide);
}
.f-chart--bleed {
  max-width: 100%;
  padding: var(--space-5) var(--gutter);
  background: var(--paper-deep);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.f-chart__title {
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.005em;
  margin: 0 0 var(--space-1);
  max-width: var(--measure);
}
.f-chart__subtitle {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
}
.f-chart__source {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--ink-faint);
  margin: var(--space-2) 0 0;
  font-style: italic;
}
.f-chart__viz {
  min-height: 240px;
  width: 100%;
}

/* Scrollytelling: sticky-graphic + scrolling-text pattern.
   Used when you want one chart to update as the reader scrolls past steps. */
.f-scrolly {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
  max-width: 1200px;
  margin: var(--space-6) auto;
  padding: 0 var(--gutter);
}
.f-scrolly__graphic {
  position: sticky;
  top: 12vh;
  height: 76vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.f-scrolly__steps {
  display: flex;
  flex-direction: column;
  gap: 80vh;        /* tall gaps create the scroll-trigger windows */
  padding: 30vh 0;
}
.f-scrolly__step {
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: var(--leading-snug);
  color: var(--ink-soft);
  background: var(--paper);
  padding: var(--space-3);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-smooth), color var(--transition-smooth);
}
.f-scrolly__step.is-active {
  border-left-color: var(--accent);
  color: var(--ink);
}

@media (max-width: 768px) {
  .f-scrolly {
    grid-template-columns: 1fr;
  }
  .f-scrolly__graphic {
    position: sticky;
    top: 8vh;
    height: 50vh;
    background: var(--paper);
    padding: var(--space-2) 0;
    z-index: 10;
    border-bottom: 1px solid var(--rule);
  }
  .f-scrolly__steps {
    gap: 60vh;
    padding: 20vh 0;
  }
}

/* Inline callout — short asides, not pull-quotes */
.f-callout {
  background: var(--accent-soft);
  border-radius: 4px;
  padding: var(--space-2) var(--space-3);
  margin: var(--space-3) 0;
  font-size: var(--step-0);
  color: var(--ink);
  font-family: var(--font-body);
  border-left: 3px solid var(--accent);
}

/* Tag chips — for filters, peers, etc. */
.f-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  padding: 0.15em 0.55em;
  border-radius: 3px;
  background: var(--rule);
  color: var(--ink-soft);
  letter-spacing: -0.01em;
}
.f-tag--accent { background: var(--accent-soft); color: var(--accent-dark); }

/* ============================================================
   INDEX PAGE
   ============================================================ */
.findings-index {
  max-width: var(--measure-wide);
  margin: var(--space-5) auto;
  padding: 0 var(--gutter);
}
.findings-index h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 144;
  font-size: var(--step-4);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}
.findings-index__intro {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--ink-soft);
  font-size: var(--step-1);
  max-width: var(--measure);
  margin: 0 0 var(--space-5);
}
.f-index-card {
  display: block;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  transition: padding-left var(--transition-smooth);
}
.f-index-card:hover { padding-left: var(--space-2); }
.f-index-card:last-of-type { border-bottom: 1px solid var(--rule); }
.f-index-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 72;
  font-size: var(--step-2);
  color: var(--ink);
  margin: 0 0 var(--space-1);
  letter-spacing: -0.015em;
}
.f-index-card__dek {
  font-family: var(--font-body);
  font-size: var(--step-0);
  color: var(--ink-muted);
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
}
.f-index-card__meta {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}
.f-index-card__meta span + span::before { content: " · "; margin: 0 0.4em; }

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}