/* ============================================================
   BCHC Donor — style.css
   Storybook system per DESIGN.md: white paper canvas, rounded
   display type, one saturated green, sticker-flat components
   with 2px borders and 12px radius. No gradients, no shadows.
   ============================================================ */

:root {
  /* Colors */
  --color-eager-green: #58cc02;
  --color-eager-green-dark: #46a302;
  --color-storybook-green: #d7ffb8;
  --color-spark-blue: #1cb0f6;
  --color-fresh-leaf: #a5ed6e;
  --color-night-ink: #000437;
  --color-paper-white: #ffffff;
  --color-charcoal: #4b4b4b;
  --color-pencil-gray: #777777;
  --color-faded-gray: #afafaf;

  /* Type */
  --font-feather: 'Nunito', ui-sans-serif, system-ui, -apple-system,
                  BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-duolingo-sans: 'Nunito Sans', ui-sans-serif, system-ui, -apple-system,
                        BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --text-caption: 13px;
  --leading-caption: 1.23;
  --text-nav-label: 15px;
  --leading-nav-label: 1.33;
  --tracking-nav-label: 0.053em;
  --text-body: 17px;
  --leading-body: 1.18;
  --text-subheading: 19px;
  --leading-subheading: 1.4;
  --text-heading-sm: 32px;
  --text-heading: 48px;
  --text-display: 64px;

  --weight-medium: 500;
  --weight-bold: 700;
  --weight-black: 800;

  /* Spacing */
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-64: 64px;
  --spacing-80: 80px;
  --spacing-96: 96px;

  /* Layout */
  --page-max-width: 1200px;
  --gutter: 24px;
  --header-h: 72px;

  /* Shape */
  --radius: 12px;
  --border-w: 2px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: var(--font-duolingo-sans);
  font-weight: var(--weight-medium);
  font-size: var(--text-body);
  line-height: 1.47;
  color: var(--color-pencil-gray);
  background: var(--color-paper-white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

img, svg { max-width: 100%; }

strong { font-weight: var(--weight-bold); color: var(--color-charcoal); }

/* ============================================================
   HEADER — minimal white bar, sticky
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  background: var(--color-paper-white);
  border-bottom: var(--border-w) solid transparent;
}
.site-header.is-scrolled,
.site-header.is-solid {
  border-bottom-color: #e5e5e5;
}

.header-inner {
  max-width: var(--page-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  font-family: var(--font-feather);
  font-size: 21px;
  font-weight: var(--weight-black);
  letter-spacing: -0.02em;
  color: var(--color-eager-green);
  flex: none;
}
.logo-claw { flex: none; }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}
.site-nav a {
  padding: 10px var(--spacing-16);
  border-radius: var(--radius);
  font-size: var(--text-nav-label);
  line-height: var(--leading-nav-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-pencil-gray);
}
.site-nav a:hover { color: var(--color-spark-blue); }
.site-nav .btn { margin-left: var(--spacing-8); color: var(--color-paper-white); }
.site-nav .btn:hover { color: var(--color-paper-white); }

/* burger */
.nav-toggle { display: none; }
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
}
.burger span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-pencil-gray);
}

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
.section {
  position: relative;
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding: var(--spacing-96) var(--gutter);
  scroll-margin-top: var(--header-h);
}

/* soft tinted full-bleed band */
.band {
  background: var(--color-storybook-green);
  padding: var(--spacing-96) 0;
  scroll-margin-top: var(--header-h);
}
.band-inner {
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding: 0 var(--gutter);
}

/* editorial split: copy left, illustration right */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-64);
  align-items: center;
}
.split-art { display: block; width: 100%; height: auto; }

.dots-divider {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: center;
  gap: var(--spacing-12);
}
.dots-divider span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-storybook-green);
}
.dots-divider span:nth-child(2) { background: var(--color-fresh-leaf); }

/* ============================================================
   TYPE
   ============================================================ */
.overline {
  display: block;
  font-size: var(--text-nav-label);
  line-height: var(--leading-nav-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-spark-blue);
  margin: 0 0 var(--spacing-16);
}
.overline-center { text-align: center; }

.section-title {
  font-family: var(--font-feather);
  font-size: clamp(2rem, 5.4vw, 3rem);          /* → 48px */
  font-weight: var(--weight-black);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-eager-green);
  margin: 0 0 var(--spacing-24);
}
.section-title-center { text-align: center; }

.section-lede {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-pencil-gray);
  max-width: 60ch;
  margin: 0 0 var(--spacing-48);
}
.section-lede-center { margin-inline: auto; text-align: center; }

h3 {
  font-family: var(--font-duolingo-sans);
  font-weight: var(--weight-bold);
  color: var(--color-charcoal);
}

/* ============================================================
   BUTTONS — sticker-flat, 12px radius
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px var(--spacing-24);
  border: var(--border-w) solid transparent;
  border-radius: var(--radius);
  background: var(--color-eager-green);
  color: var(--color-paper-white);
  font-family: var(--font-duolingo-sans);
  font-size: var(--text-nav-label);
  font-weight: var(--weight-bold);
  line-height: 1.2;
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--color-eager-green-dark); }

.btn-secondary {
  background: transparent;
  border-color: var(--color-faded-gray);
  color: var(--color-spark-blue);
  font-size: 14px;
}
.btn-secondary:hover {
  background: transparent;
  border-color: var(--color-spark-blue);
  color: var(--color-spark-blue);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding-top: var(--spacing-64);
  padding-bottom: var(--spacing-24);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-64);
  align-items: center;
}
.hero-copy h1 {
  font-family: var(--font-feather);
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: var(--weight-black);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
  margin: 0 0 var(--spacing-24);
}
.subtitle {
  font-size: var(--text-body);
  line-height: 1.47;
  color: var(--color-pencil-gray);
  max-width: 52ch;
  margin: 0 0 var(--spacing-32);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-40);
}
.hero-art { display: block; width: 100%; height: auto; }

/* key facts as sticker pills */
.compliance-strip {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-12);
  padding: 0;
  margin: 0;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  padding: 8px var(--spacing-16);
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-pencil-gray);
}
.pill-check {
  width: 15px;
  height: 15px;
  flex: none;
  color: var(--color-eager-green);
}

.scroll-badge { display: none; }

/* ============================================================
   GAME
   ============================================================ */
.game-frame {
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  padding: var(--spacing-12);
  background: var(--color-paper-white);
}
#game-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 960 / 540;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
}
#game {
  display: block;
  width: 100%;
  height: 100%;
  background: #000;
  outline: none;
  touch-action: none;
}
#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hud-coins {
  position: absolute;
  top: var(--spacing-12);
  left: var(--spacing-12);
  padding: 6px 14px;
  border-radius: var(--radius);
  background: var(--color-eager-green);
  color: var(--color-paper-white);
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
}
.hud-prizes {
  top: 52px;
  background: var(--color-paper-white);
  color: var(--color-charcoal);
  border: var(--border-w) solid var(--color-faded-gray);
}
.hud-stack {
  position: absolute;
  top: var(--spacing-12);
  right: var(--spacing-12);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}
.hud-btn {
  width: 42px;
  height: 42px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--color-paper-white);
  border: var(--border-w) solid var(--color-faded-gray);
}
.hud-btn .glyph {
  color: var(--color-charcoal);
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  line-height: 1;
}
.hud-btn .cap {
  color: var(--color-pencil-gray);
  font-size: 10px;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  margin-top: 2px;
}
.controls-hint {
  margin: var(--spacing-16) 0 0;
  text-align: center;
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-faded-gray);
}

/* ============================================================
   HOW TO PLAY — numbered sticker steps
   ============================================================ */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-24);
}
.tl-step {
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  padding: var(--spacing-24);
}
.tl-num {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--color-storybook-green);
  color: var(--color-eager-green-dark);
  font-family: var(--font-feather);
  font-size: var(--text-subheading);
  font-weight: var(--weight-black);
  line-height: 1;
  margin-bottom: var(--spacing-16);
}
.tl-step h3 {
  margin: 0 0 var(--spacing-8);
  font-size: var(--text-subheading);
  line-height: 1.2;
}
.tl-step p {
  margin: 0;
  font-size: var(--text-caption);
  line-height: 1.47;
  color: var(--color-pencil-gray);
}

@media (min-width: 880px) {
  .timeline { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   WHAT IS A CLAW MACHINE
   ============================================================ */
.whatis-prose p {
  margin: 0 0 var(--spacing-16);
  max-width: 62ch;
}
.whatis-prose p:last-child { margin-bottom: 0; }

.facts-panel {
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  padding: var(--spacing-24);
  margin-top: var(--spacing-32);
  background: var(--color-paper-white);
}
.facts-panel h3 {
  margin: 0 0 var(--spacing-16);
  font-size: var(--text-nav-label);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-pencil-gray);
}
.facts-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-16);
}
.facts-list li {
  display: flex;
  gap: var(--spacing-12);
  align-items: flex-start;
}
.fact-icon {
  width: 24px;
  height: 24px;
  flex: none;
  color: var(--color-eager-green);
  margin-top: 2px;
}
.fact-label {
  display: block;
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-faded-gray);
  margin-bottom: 2px;
}
.fact-value {
  display: block;
  font-size: var(--text-caption);
  line-height: 1.4;
  color: var(--color-charcoal);
}

.whatis-note {
  margin: var(--spacing-48) auto 0;
  max-width: 34ch;
  text-align: center;
  font-family: var(--font-duolingo-sans);
  font-size: var(--text-heading-sm);
  font-weight: var(--weight-bold);
  line-height: 1.2;
  color: var(--color-charcoal);
}

/* ============================================================
   ABOUT — tinted band
   ============================================================ */
.about-prose p {
  margin: 0 0 var(--spacing-16);
  max-width: 60ch;
  color: var(--color-charcoal);
}
.about-prose p:last-child { margin-bottom: 0; }

.about-glance {
  border: var(--border-w) solid var(--color-eager-green);
  border-radius: var(--radius);
  padding: var(--spacing-24);
  background: var(--color-paper-white);
}
.about-glance h3 {
  margin: 0 0 var(--spacing-16);
  font-size: var(--text-nav-label);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-pencil-gray);
}
.glance-list { margin: 0; }
.glance-row {
  display: grid;
  gap: 2px;
  padding: var(--spacing-12) 0;
  border-bottom: var(--border-w) solid #eeeeee;
}
.glance-row:last-child { border-bottom: none; padding-bottom: 0; }
.glance-row dt {
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-faded-gray);
}
.glance-row dd {
  margin: 0;
  font-size: var(--text-caption);
  line-height: 1.4;
  color: var(--color-charcoal);
}

/* ============================================================
   RESPONSIBLE PLAY
   ============================================================ */
.responsible-wrap p {
  margin: 0 0 var(--spacing-16);
  max-width: 62ch;
}
.responsible-badge {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--color-storybook-green);
  color: var(--color-eager-green-dark);
  margin-bottom: var(--spacing-24);
}
.responsible-badge svg { width: 36px; height: 36px; }
.responsible-note {
  margin-top: var(--spacing-24) !important;
  padding: var(--spacing-16);
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  font-size: var(--text-caption);
  line-height: 1.47;
  color: var(--color-charcoal);
}

/* ============================================================
   FAQ — sticker accordion
   ============================================================ */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-12);
}
.faq-item {
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  padding: 0 var(--spacing-24);
}
.faq-item[open] { border-color: var(--color-eager-green); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--spacing-16) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-16);
  font-size: var(--text-subheading);
  font-weight: var(--weight-bold);
  line-height: 1.3;
  color: var(--color-charcoal);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  color: var(--color-eager-green);
  background:
    linear-gradient(currentColor, currentColor) center / 14px 2px no-repeat,
    linear-gradient(currentColor, currentColor) center / 2px 14px no-repeat;
  transition: transform 0.15s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body { padding: 0 0 var(--spacing-16); max-width: 62ch; }
.faq-body p {
  margin: 0;
  font-size: var(--text-caption);
  line-height: 1.47;
  color: var(--color-pencil-gray);
}

/* ============================================================
   POLICY PAGES
   ============================================================ */
.policy-main {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--spacing-64) var(--gutter) var(--spacing-96);
}
.policy-back {
  display: inline-block;
  margin-bottom: var(--spacing-32);
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-spark-blue);
}
.policy-card {
  border: var(--border-w) solid var(--color-faded-gray);
  border-radius: var(--radius);
  padding: var(--spacing-32);
}
.policy-card h1 {
  font-family: var(--font-feather);
  font-size: clamp(2rem, 5.4vw, 3rem);
  font-weight: var(--weight-black);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-eager-green);
  margin: 0 0 var(--spacing-8);
}
.policy-card .policy-updated {
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
  color: var(--color-faded-gray);
  margin: 0 0 var(--spacing-32);
}
.policy-card h2 {
  font-size: var(--text-subheading);
  font-weight: var(--weight-bold);
  line-height: 1.2;
  color: var(--color-charcoal);
  margin: var(--spacing-32) 0 var(--spacing-8);
}
.policy-card p,
.policy-card li {
  color: var(--color-pencil-gray);
  font-size: var(--text-body);
  line-height: 1.47;
}
.policy-card p { margin: 0 0 var(--spacing-12); }
.policy-card ul { margin: 0 0 var(--spacing-12); padding-left: 1.2rem; }
.policy-card li { margin: var(--spacing-8) 0; }
.policy-card a { color: var(--color-spark-blue); font-weight: var(--weight-bold); }

/* ============================================================
   FOOTER — full-bleed green band + white legal strip
   ============================================================ */
.site-footer { background: var(--color-eager-green); }
.footer-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: var(--spacing-48) var(--gutter);
  color: var(--color-paper-white);
}
.site-footer .footer-mark {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-12);
  font-family: var(--font-feather);
  font-size: var(--text-heading-sm);
  font-weight: var(--weight-black);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-paper-white);
  margin: 0 0 var(--spacing-16);
}
.site-footer .footer-mark svg { width: 30px; height: 30px; }
.site-footer p {
  margin: var(--spacing-8) 0;
  font-size: var(--text-nav-label);
  line-height: 1.47;
  max-width: 60ch;
}
.footer-strong { font-weight: var(--weight-bold); }
.footer-links {
  margin-top: var(--spacing-24) !important;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  max-width: none !important;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-nav-label);
  text-transform: uppercase;
}
.footer-links a:hover { color: var(--color-storybook-green); }
.site-footer a { color: var(--color-paper-white); font-weight: var(--weight-bold); }

/* readable legal strip below the green band */
.footer-legal {
  background: var(--color-paper-white);
  border-top: var(--border-w) solid var(--color-storybook-green);
}
.footer-legal-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: var(--spacing-24) var(--gutter);
}
.footer-legal p {
  margin: var(--spacing-8) 0;
  font-size: var(--text-caption);
  line-height: 1.47;
  color: var(--color-pencil-gray);
  max-width: 90ch;
}
.footer-legal .footer-legal-strong {
  font-weight: var(--weight-bold);
  color: var(--color-charcoal);
}
.footer-legal a { color: var(--color-spark-blue); font-weight: var(--weight-bold); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .hero-grid,
  .split { grid-template-columns: 1fr; gap: var(--spacing-32); }
  .hero-art, .split-art { max-width: 420px; margin-inline: auto; }
}

@media (max-width: 820px) {
  :root {
    --gutter: 20px;
    --spacing-96: 64px;
  }
  .burger { display: flex; }
  .header-inner { position: relative; }
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-8);
    padding: 0 var(--gutter);
    background: var(--color-paper-white);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav-toggle:checked ~ .site-nav {
    max-height: 420px;
    padding-top: var(--spacing-16);
    padding-bottom: var(--spacing-16);
    border-bottom: var(--border-w) solid #e5e5e5;
  }
  .site-nav .btn { margin-left: 0; }
}

@media (max-width: 420px) {
  .hud-btn { width: 36px; height: 36px; }
  .hud-coins { padding: 4px 10px; font-size: 11px; }
  .hud-prizes { top: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .faq-item summary::after, .site-nav { transition: none; }
}