/* ============================================================
   CoCitizen — Styles
   1) Foundations (tokens)
   2) Base / Reset
   3) Layout utilities
   4) Typography
   5) Surfaces
   6) Components (header, nav, buttons, cards, footer)
   7) Page patterns (home intro, home sections, project page-head)
   8) Styleguide
   9) Media queries
   ============================================================ */


/* ============================================================
   1) Foundations (tokens)
   ============================================================ */
:root {
  --layout-page-max: 1100px;
  --layout-prose-max: 70ch;
  --layout-pad: 3rem;

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --color-bg: #F8F7F3;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-muted: #58626F;
  --color-border: rgba(26,26,26,.09);

  --color-cobalt: #0047AB;
  --color-accent: #C47E3C;
  --color-on-dark: rgba(255,255,255,.93);
  --color-on-dark-muted: rgba(255,255,255,.72);

  --color-link: var(--color-cobalt);
  --color-focus: rgba(0,71,171,.28);

  --radius: 8px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);

  --motion: 140ms ease;
}


/* ============================================================
   2) Base / Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html, body { overflow-x: clip; }
html:focus-within { scroll-behavior: smooth; }
[id] { scroll-margin-top: 84px; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Public Sans", system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

img { max-width: 100%; height: auto; display: block; }


/* ============================================================
   3) Layout utilities
   ============================================================ */
.container {
  max-width: var(--layout-page-max);
  margin: 0 auto;
  padding: 0 var(--layout-pad);
}

.full-bleed {
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  width: 100vw;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--space-2) var(--space-4);
  background: var(--color-cobalt);
  color: var(--color-on-dark);
  text-decoration: none;
  z-index: 100;
}
.skip-link:focus { top: 0; }


/* ============================================================
   4) Typography
   ============================================================ */
h1, h2, h3 {
  margin: 0 0 var(--space-4);
  line-height: 1.2;
  color: var(--color-cobalt);
}

h1 { font-size: clamp(1.9rem, 3.5vw, 2.5rem); font-weight: 700; }
h2 { font-size: clamp(1.3rem, 2.2vw, 1.65rem); font-weight: 600; }
h3 { font-size: 1.05rem; font-weight: 600; }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--color-muted);
  line-height: 1.6;
}

.muted { color: var(--color-muted); }
.small { font-size: 0.85rem; }

/* Left amber border — editorial highlight for key statements */
.highlight {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.25rem;
  margin-left: 0;
}

/* Prose — long-form text sections */
.prose {
  max-width: var(--layout-prose-max);
  padding: var(--space-8) 0;
}

.prose h2 {
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--space-3);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}
.prose h2:first-child { margin-top: 0; }

.prose h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}
.prose h3:first-child { margin-top: 0; }

.prose ul,
.prose ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-6);
}

.prose li { margin-bottom: var(--space-2); }


/* ============================================================
   5) Surfaces
   ============================================================ */
.surface-dark {
  background: var(--color-cobalt);
  color: var(--color-on-dark);
}

.surface-dark a {
  color: var(--color-on-dark);
  text-decoration-color: rgba(255,255,255,.3);
}

.surface-dark a:hover {
  text-decoration-color: var(--color-accent);
}


/* ============================================================
   6) Components
   ============================================================ */

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}

.brand {
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand:hover { text-decoration: none; }
.brand__co      { color: var(--color-accent); }
.brand__citizen { color: var(--color-cobalt); }

/* Nav */
.nav {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.nav a {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--motion);
  padding-bottom: 2px;
}

/* Animated underline — slides in from left on hover, stays for current page */
.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--motion);
}

.nav a:hover { color: var(--color-cobalt); }
.nav a:hover::after { width: 100%; }

.nav a[aria-current="page"] {
  color: var(--color-cobalt);
  font-weight: 600;
}
.nav a[aria-current="page"]::after { width: 100%; }

/* Button — amber on light backgrounds */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem var(--space-6);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--color-accent);
  color: #fff;
  border: 2px solid transparent;
  transition: opacity var(--motion), transform var(--motion);
  cursor: pointer;
}

.btn:hover {
  opacity: .87;
  transform: translateY(-1px);
  text-decoration: none;
  color: #fff;
}

/* Hairline treatment: 2px cobalt stripe, 1px bg gap, then the cobalt block.
   Achieved with layered box-shadows — no extra markup needed. */
.surface-dark {
  box-shadow:
    0 -1px 0 0 var(--color-bg),
    0 -3px 0 0 var(--color-cobalt);
}

/* Button on dark/cobalt surfaces — cobalt with white outline */
.surface-dark .btn {
  background: var(--color-cobalt);
  border-color: rgba(255,255,255,.55);
  color: #fff;
}

.surface-dark .btn:hover {
  opacity: 1;
  border-color: rgba(255,255,255,.9);
}

/* Tool cards — elevation only, no border caps */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  padding-bottom: var(--space-8);
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: var(--space-8) var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.05);
  transition: transform var(--motion), box-shadow var(--motion);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 6px rgba(0,0,0,.07), 0 8px 20px rgba(0,0,0,.07);
  text-decoration: none;
}

.card h3 { margin: 0; }

.card__meta {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-muted);
}

.card p { color: var(--color-muted); font-size: 0.95rem; }

.card__arrow {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* Footer */
.site-footer {
  margin-top: var(--space-16);
  border-top: 3px solid var(--color-accent);
  padding: var(--space-8) 0;
}

.site-footer.surface-dark p { margin: 0; }

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}


/* ============================================================
   7) Page patterns
   ============================================================ */

/* Home intro — light, typographic, no dark surface */
.home-intro {
  padding: var(--space-20) 0 var(--space-16);
  border-bottom: 1px solid var(--color-rule);
}

/* Wordmark — the visual identity of the site */
.wordmark {
  font-size: clamp(2.8rem, 7vw, 4.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-6);
}

.wordmark__co   { color: var(--color-accent); }
.wordmark__citizen { color: var(--color-cobalt); }

.home-intro .intro-body {
  max-width: 58ch;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.home-intro .intro-cta {
  margin-top: var(--space-2);
}

/* Stats band — full-width cobalt strip with key numbers */
.stats-band {
  padding: var(--space-8) 0;
}

.stats {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat__value {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat__label {
  font-size: 0.8rem;
  color: var(--color-on-dark-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 500;
}

/* Tools section */
.tools-section {
  padding-top: var(--space-12);
}

/* Home sections (About, Contact) — spacing only, no rules */
.home-section {
  padding-top: var(--space-4);
}

/* Project page-head */
.page-head {
  padding: var(--space-12) 0;
  border-bottom: 3px solid var(--color-accent);
}

.page-head h1 {
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.page-head .kicker {
  font-size: 1.1rem;
  color: var(--color-on-dark-muted);
  margin: 0;
  font-weight: 400;
  line-height: 1.4;
}


/* ============================================================
   8) Styleguide (internal only)
   ============================================================ */
.sg-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.sg-swatch {
  padding: var(--space-6) var(--space-4);
  border-radius: var(--radius);
  font-size: 0.78rem;
  line-height: 1.5;
}

/* Option 1: cobalt overline on h2 */
.sg-overline {
  border-top: 2px solid var(--color-cobalt);
  padding-top: var(--space-4);
  margin-top: var(--space-8);
}
.sg-overline:first-child { margin-top: 0; }

/* Option 2: stats band */
.sg-stats-band { padding: var(--space-8) 0; }

.sg-stats {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.sg-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sg-stat__value {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.sg-stat__label {
  font-size: 0.8rem;
  color: var(--color-on-dark-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 500;
}

/* Option 3: periodic table tile */
.sg-element-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 80px;
  border: 2px solid var(--color-cobalt);
  border-radius: 4px;
  padding: var(--space-2);
  gap: 1px;
}

.sg-element-tile__number {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-cobalt);
  align-self: flex-start;
  line-height: 1;
}

.sg-element-tile__symbol {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-cobalt);
  line-height: 1;
}

.sg-element-tile__name {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.sg-element-tile--on-dark { border-color: var(--color-accent); }
.sg-element-tile--on-dark .sg-element-tile__number { color: var(--color-accent); }
.sg-element-tile--on-dark .sg-element-tile__symbol { color: var(--color-on-dark); }
.sg-element-tile--on-dark .sg-element-tile__name   { color: var(--color-on-dark-muted); }

/* Option 4: cobalt left accent on prose h2 */
.sg-heading-accent {
  border-left: 3px solid var(--color-cobalt);
  padding-left: 1.25rem;
  margin-left: 0;
}


/* ============================================================
   9) Media queries
   ============================================================ */
@media (max-width: 640px) {
  :root { --layout-pad: 1.25rem; }

  .card-grid { grid-template-columns: 1fr; }

  .home-intro { padding: var(--space-12) 0 var(--space-8); }

  .nav { gap: var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }
  .btn, .card { transition: none; }
}