/* =========================================================================
   Camp Math — shared stylesheet
   Design tokens, layout, components, and utilities used by every page.
   No build step: this file is loaded as-is by every HTML page in the site.
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Brand palette */
  --forest-900: #12271d;
  --forest-800: #17351f;
  --forest-700: #204a2c;
  --forest-600: #2c6339;
  --forest-500: #3c7d49;
  --forest-100: #e3ede2;

  --canvas: #f8f2e3;
  --canvas-dim: #efe6cf;
  --canvas-card: #fffdf6;

  --charcoal: #292722;
  --charcoal-soft: #52504a;

  --sky: #5f95a8;
  --sky-dark: #3f6f80;
  --sky-tint: #e4eff2;

  --ember: #dd7635;
  --ember-dark: #b85a20;
  --ember-tint: #fbe8d8;

  --success: #3c7d49;
  --danger: #b3402c;
  --danger-tint: #fbe5df;

  /* Semantic */
  --bg: var(--canvas);
  --bg-alt: var(--canvas-dim);
  --surface: var(--canvas-card);
  --text: var(--charcoal);
  --text-muted: var(--charcoal-soft);
  --border: #e0d5b8;
  --focus-ring: #2c6339;

  /* Type */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  /* Shape */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(18, 39, 29, 0.08), 0 1px 1px rgba(18, 39, 29, 0.06);
  --shadow-md: 0 6px 20px rgba(18, 39, 29, 0.1), 0 2px 6px rgba(18, 39, 29, 0.06);
  --shadow-lg: 0 18px 40px rgba(18, 39, 29, 0.16), 0 6px 16px rgba(18, 39, 29, 0.08);

  --container-w: 1180px;
  --transition: 180ms ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
ul, ol { padding-left: 1.2em; }
a { color: var(--forest-700); }
a:hover { color: var(--ember-dark); }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; margin: 0 0 var(--space-3); color: var(--forest-800); }
h1 { font-size: clamp(1.9rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 var(--space-4); }
button { font-family: inherit; }

.container { width: 100%; max-width: var(--container-w); margin: 0 auto; padding: 0 var(--space-5); }

.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;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -60px;
  background: var(--forest-800); color: #fff; padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm); z-index: 200; transition: top var(--transition);
}
.skip-link:focus { top: var(--space-4); }

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Topographic contour pattern, used as a subtle background texture */
.contour-bg {
  background-image:
    radial-gradient(circle at 20% 30%, rgba(60, 125, 73, 0.10) 0, rgba(60, 125, 73, 0.10) 40px, transparent 41px),
    radial-gradient(circle at 20% 30%, rgba(60, 125, 73, 0.08) 0, rgba(60, 125, 73, 0.08) 70px, transparent 71px),
    radial-gradient(circle at 85% 70%, rgba(95, 149, 168, 0.10) 0, rgba(95, 149, 168, 0.10) 55px, transparent 56px),
    radial-gradient(circle at 85% 70%, rgba(95, 149, 168, 0.08) 0, rgba(95, 149, 168, 0.08) 90px, transparent 91px);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
.contour-tile {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cg fill='none' stroke='%233c7d49' stroke-opacity='0.09' stroke-width='1.5'%3E%3Ccircle cx='60' cy='60' r='14'/%3E%3Ccircle cx='60' cy='60' r='28'/%3E%3Ccircle cx='60' cy='60' r='42'/%3E%3Ccircle cx='60' cy='60' r='56'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 120px 120px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-weight: 600; font-size: 0.95rem; text-decoration: none; cursor: pointer;
  border-radius: var(--radius-pill); border: 2px solid transparent;
  padding: 0.75em 1.5em; transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  line-height: 1.2;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--ember); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--ember-dark); color: #fff; box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--forest-800); color: #fff; }
.btn-secondary:hover { background: var(--forest-900); color: #fff; }
.btn-outline { background: transparent; border-color: var(--forest-700); color: var(--forest-800); }
.btn-outline:hover { background: var(--forest-100); color: var(--forest-900); }
.btn-ghost { background: transparent; color: var(--forest-800); padding: 0.6em 1em; }
.btn-ghost:hover { background: var(--forest-100); }
.btn-sm { padding: 0.5em 1.1em; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248, 242, 227, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding-block: var(--space-3); gap: var(--space-4); }
.logo { display: inline-flex; align-items: center; gap: var(--space-2); text-decoration: none; font-family: var(--font-display); font-weight: 700; font-size: 1.35rem; color: var(--forest-900); }
.logo svg { width: 34px; height: 34px; flex: none; }
.logo-accent { color: var(--ember); }
.nav-toggle {
  display: none; background: transparent; border: 2px solid var(--forest-700); border-radius: var(--radius-sm);
  padding: 0.4em 0.6em; cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; }
.primary-nav ul { list-style: none; display: flex; gap: var(--space-5); margin: 0; padding: 0; align-items: center; }
.primary-nav a { text-decoration: none; font-weight: 600; color: var(--forest-800); padding: var(--space-2) 0; border-bottom: 2px solid transparent; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { border-bottom-color: var(--ember); color: var(--forest-900); }

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .primary-nav {
    position: absolute; inset-inline: 0; top: 100%;
    background: var(--canvas); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    max-height: 0; overflow: hidden;
    visibility: hidden;
    transition: max-height var(--transition), visibility 0s linear var(--transition);
  }
  .primary-nav.is-open { max-height: 400px; visibility: visible; transition-delay: 0s; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-3) var(--space-5) var(--space-5); }
  .primary-nav a { display: block; padding: var(--space-3) 0; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--forest-900); color: #eef4ec; margin-top: var(--space-8); }
.footer-inner { padding-block: var(--space-7); display: grid; gap: var(--space-6); grid-template-columns: 1.3fr 1fr 1fr; }
.footer-brand .logo { color: #fff; }
.footer-tagline { color: #b9ceb8; max-width: 32ch; }
.footer-col h3 { color: #fff; font-family: var(--font-body); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--space-3); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.footer-col a { color: #dbe8d9; text-decoration: none; }
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-block: var(--space-5); color: #9fb69d; font-size: 0.85rem; }
@media (max-width: 780px) { .footer-inner { grid-template-columns: 1fr; } }

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-8) var(--space-7);
  background: linear-gradient(180deg, var(--forest-100), var(--canvas) 70%);
  position: relative; overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-7); align-items: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  background: var(--ember-tint); color: var(--ember-dark); font-weight: 700; font-size: 0.8rem;
  padding: 0.35em 0.9em; border-radius: var(--radius-pill); margin-bottom: var(--space-4); letter-spacing: 0.02em;
}
.hero h1 { margin-bottom: var(--space-3); }
.hero-tagline { font-size: 1.2rem; color: var(--forest-700); font-weight: 600; }
.hero-lead { font-size: 1.05rem; color: var(--text-muted); max-width: 54ch; }
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-5); }
.hero-art { justify-self: center; }
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 280px; margin-inline: auto; }
}

/* Campfire flicker illustration used in the hero */
.campfire { width: 230px; }
.campfire .flame { transform-origin: 50% 100%; animation: flicker 2.6s ease-in-out infinite; }
.campfire .flame-inner { transform-origin: 50% 100%; animation: flicker 2.1s ease-in-out infinite reverse; }
@keyframes flicker {
  0%, 100% { transform: scaleY(1) scaleX(1) rotate(0deg); }
  25% { transform: scaleY(1.05) scaleX(0.97) rotate(-1.5deg); }
  50% { transform: scaleY(0.96) scaleX(1.03) rotate(1deg); }
  75% { transform: scaleY(1.03) scaleX(0.98) rotate(-0.5deg); }
}

/* ---------- Section basics ---------- */
.section { padding-block: var(--space-8); }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 62ch; margin-bottom: var(--space-6); }
.section-head p { color: var(--text-muted); }
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; color: var(--forest-600); font-size: 0.8rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
  border: 1px solid var(--border); padding: var(--space-5); transition: box-shadow var(--transition), transform var(--transition);
}
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.calc-card {
  display: flex; flex-direction: column; gap: var(--space-3); text-decoration: none; color: inherit;
  height: 100%;
}
.calc-card:hover, .calc-card:focus-visible { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.calc-card .icon-badge { background: var(--forest-100); color: var(--forest-700); }
.calc-card h3 { margin: 0; color: var(--forest-900); font-size: 1.15rem; }
.calc-card p { color: var(--text-muted); margin: 0; font-size: 0.95rem; flex-grow: 1; }
.calc-card .card-cta { font-weight: 700; color: var(--ember-dark); display: inline-flex; align-items: center; gap: 0.35em; }
.calc-card .card-cta svg { width: 16px; height: 16px; transition: transform var(--transition); }
.calc-card:hover .card-cta svg { transform: translateX(3px); }

.icon-badge {
  width: 52px; height: 52px; border-radius: var(--radius-md);
  display: inline-flex; align-items: center; justify-content: center; flex: none;
}
.icon-badge svg { width: 28px; height: 28px; }

.category-card { border-top: 4px solid var(--sky); }
.category-card.cat-fuel { border-top-color: var(--ember); }
.category-card.cat-comfort { border-top-color: var(--forest-500); }
.category-card.cat-hiking { border-top-color: var(--sky-dark); }
.category-card h3 { display: flex; align-items: center; gap: var(--space-2); }

.featured-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: center;
  background: linear-gradient(135deg, var(--forest-800), var(--forest-600));
  color: #fff; border: none; box-shadow: var(--shadow-lg);
}
.featured-card h2, .featured-card h3 { color: #fff; }
.featured-card p { color: #dcebda; }
.featured-card .eyebrow { color: #bfe0c2; }
@media (max-width: 780px) { .featured-card { grid-template-columns: 1fr; } }

/* ---------- Steps / how it works ---------- */
.steps { counter-reset: step; }
.step { position: relative; padding-left: 3.2rem; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0; width: 2.4rem; height: 2.4rem; border-radius: 50%;
  background: var(--forest-700); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center;
}

/* ---------- Trust section ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
@media (max-width: 780px) { .trust-grid { grid-template-columns: 1fr; } }
.trust-card { text-align: left; }
.trust-card .icon-badge { background: var(--sky-tint); color: var(--sky-dark); margin-bottom: var(--space-3); }

/* ---------- Calculator page layout ---------- */
.calc-hero { padding-block: var(--space-6) var(--space-5); }
.calc-hero .eyebrow { display: block; margin-bottom: var(--space-2); }
.breadcrumbs { font-size: 0.85rem; color: var(--text-muted); margin-bottom: var(--space-3); }
.breadcrumbs a { color: var(--text-muted); }
.calc-intro { max-width: 68ch; color: var(--text-muted); font-size: 1.05rem; }

.calc-layout {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--space-6); align-items: start;
}
@media (max-width: 940px) { .calc-layout { grid-template-columns: 1fr; } }

.calc-form-card { padding: var(--space-6); }
.calc-form-card h2 { font-size: 1.3rem; }

.field { margin-bottom: var(--space-5); }
.field label, .field legend { display: block; font-weight: 700; margin-bottom: 0.35em; color: var(--forest-900); font-size: 0.95rem; padding: 0; }
.field .help { display: block; font-weight: 400; font-size: 0.85rem; color: var(--text-muted); margin-top: 0.3em; }
.field input[type="number"], .field input[type="text"], .field input[type="time"], .field select {
  width: 100%; padding: 0.65em 0.8em; border-radius: var(--radius-sm); border: 1.5px solid var(--border);
  background: #fff; font-size: 1rem; color: var(--text); transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus, .field select:focus { border-color: var(--forest-600); box-shadow: 0 0 0 3px rgba(60,125,73,0.15); }
.field-row { display: grid; gap: var(--space-4); grid-template-columns: repeat(2, 1fr); }
.field-row.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 560px) { .field-row, .field-row.cols-3 { grid-template-columns: 1fr; } }
.field.invalid input, .field.invalid select { border-color: var(--danger); }
.field .error-msg { display: none; color: var(--danger); font-size: 0.85rem; margin-top: 0.3em; font-weight: 600; }
.field.invalid .error-msg { display: block; }
fieldset { border: none; margin: 0; padding: 0; }

.unit-toggle, .segmented {
  display: inline-flex; background: var(--bg-alt); border-radius: var(--radius-pill); padding: 3px; gap: 2px;
}
.segmented { display: flex; flex-wrap: wrap; }
.unit-toggle button, .segmented button {
  border: none; background: transparent; padding: 0.5em 1em; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 0.85rem; cursor: pointer; color: var(--text-muted); flex: 1;
}
.unit-toggle button[aria-pressed="true"], .segmented button[aria-pressed="true"] {
  background: var(--forest-700); color: #fff; box-shadow: var(--shadow-sm);
}

.range-field { display: flex; align-items: center; gap: var(--space-3); }
.range-field input[type="range"] { flex: 1; accent-color: var(--forest-600); }
.range-value { min-width: 4.2em; text-align: right; font-weight: 700; color: var(--forest-800); }

.checkbox-row { display: flex; align-items: center; gap: var(--space-2); font-weight: 600; }
.checkbox-row input { width: 1.15em; height: 1.15em; accent-color: var(--forest-600); }

.form-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-6); }

/* Appliance / multi-row repeaters (propane calculator) */
.repeater-row { border: 1.5px dashed var(--border); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-4); position: relative; }
.repeater-row .remove-row { position: absolute; top: var(--space-3); right: var(--space-3); background: var(--danger-tint); color: var(--danger); border: none; border-radius: 50%; width: 28px; height: 28px; cursor: pointer; font-weight: 700; }

/* ---------- Results ---------- */
.results-panel { position: sticky; top: 92px; display: grid; gap: var(--space-4); }
@media (max-width: 940px) { .results-panel { position: static; } }

.result-primary {
  background: linear-gradient(160deg, var(--forest-700), var(--forest-800));
  color: #fff; padding: var(--space-6); text-align: center; border: none; box-shadow: var(--shadow-lg);
  animation: pop-in 420ms ease;
}
@keyframes pop-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }
.result-primary .eyebrow { color: #bfe0c2; }
.result-primary .result-value { font-family: var(--font-display); font-size: clamp(2.1rem, 5vw, 3rem); font-weight: 700; margin: var(--space-2) 0; }
.result-primary .result-unit { font-size: 1.1rem; font-weight: 400; opacity: 0.85; }
.result-primary .result-sub { color: #dcebda; }

.result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
@media (max-width: 480px) { .result-grid { grid-template-columns: 1fr; } }
.result-card { text-align: center; padding: var(--space-4); }
.result-card .label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); font-weight: 700; }
.result-card .value { font-size: 1.5rem; font-weight: 700; color: var(--forest-800); }

.callout {
  border-radius: var(--radius-md); padding: var(--space-4); font-size: 0.92rem;
  border: 1.5px solid var(--border); background: var(--bg-alt);
}
.callout.callout-warn { background: var(--ember-tint); border-color: #f0c9a3; color: #7a3d10; }
.callout.callout-info { background: var(--sky-tint); border-color: #bcdae2; color: #244752; }
.callout h4 { margin: 0 0 var(--space-2); font-family: var(--font-body); font-size: 0.95rem; }

.why-vary { margin-top: var(--space-4); }
.why-vary summary { cursor: pointer; font-weight: 700; color: var(--forest-800); padding: var(--space-2) 0; }

/* Gauges */
.gauge { display: grid; gap: var(--space-2); }
.gauge-track { height: 14px; border-radius: var(--radius-pill); background: var(--bg-alt); overflow: hidden; border: 1px solid var(--border); }
.gauge-fill { height: 100%; border-radius: var(--radius-pill); background: linear-gradient(90deg, var(--forest-500), var(--sky)); transition: width 500ms ease; }
.gauge-fill.warn { background: linear-gradient(90deg, var(--ember), var(--danger)); }
.gauge-labels { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--text-muted); }

/* ---------- Diagrams (tent / campsite / trail) ---------- */
.diagram-card { text-align: center; }
.diagram-card svg { margin-inline: auto; }
.trail-progress { width: 100%; }
.trail-progress .trail-line { stroke-dasharray: 4 6; }
.trail-progress .trail-fill { transition: stroke-dashoffset 600ms ease; }
.trail-progress .hiker { transition: offset-distance 600ms ease; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: var(--space-3); }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 0; overflow: hidden; }
.faq-item summary {
  cursor: pointer; font-weight: 700; padding: var(--space-4) var(--space-5); list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-3);
  color: var(--forest-900);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--ember); flex: none; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-answer { padding: 0 var(--space-5) var(--space-5); color: var(--text-muted); margin: 0; }

/* ---------- Rating widget ---------- */
.rating-widget { text-align: center; padding: var(--space-6); background: var(--forest-100); }
.rating-title { margin-bottom: var(--space-3); }
.stars { display: inline-flex; gap: 0.2em; font-size: 2rem; }
.stars .star { background: none; border: none; cursor: pointer; color: rgba(41, 39, 34, 0.28); padding: 0.1em; line-height: 1; transition: transform 120ms ease, color 120ms ease; }
.stars .star:hover, .stars .star:focus-visible { transform: scale(1.15); }
.stars.is-hovering .star.filled,
.stars .star.selected { color: var(--ember); }
.stars .star:disabled { cursor: default; }
.rating-thanks { font-weight: 700; color: var(--forest-700); margin-top: var(--space-3); }
.rating-thanks::before { content: "\2713  "; }

/* ---------- Assumptions / explanation lists ---------- */
.assumption-list { display: grid; gap: var(--space-2); list-style: none; padding: 0; }
.assumption-list li { padding-left: 1.6em; position: relative; }
.assumption-list li::before { content: "\1F441"; position: absolute; left: 0; }
.formula-box { background: var(--bg-alt); border-radius: var(--radius-md); padding: var(--space-4); font-size: 0.92rem; border: 1px solid var(--border); }
.formula-box code { background: rgba(0,0,0,0.05); padding: 0.1em 0.4em; border-radius: 4px; }

/* ---------- Related calculators ---------- */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
@media (max-width: 780px) { .related-grid { grid-template-columns: 1fr; } }

/* ---------- Legal pages ---------- */
.prose { max-width: 74ch; }
.prose h2 { margin-top: var(--space-7); }
.prose ul { color: var(--text-muted); }
.prose p { color: var(--text-muted); }
.update-date { color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Toast (copy result) ---------- */
.toast {
  position: fixed; bottom: var(--space-5); left: 50%; transform: translate(-50%, 20px);
  background: var(--forest-900); color: #fff; padding: 0.8em 1.4em; border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: opacity var(--transition), transform var(--transition);
  z-index: 300; font-weight: 600; font-size: 0.9rem;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }

/* ---------- Confetti (success flourish) ---------- */
.confetti-piece {
  position: absolute; width: 8px; height: 8px; top: -10px; opacity: 0.9; border-radius: 2px;
  animation: confetti-fall 1400ms ease-in forwards;
}
@keyframes confetti-fall {
  to { transform: translateY(160px) rotate(240deg); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .confetti-piece, .result-primary, .campfire .flame, .campfire .flame-inner { animation: none !important; }
}

/* ---------- Misc ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.stack { display: grid; gap: var(--space-4); }
.badge { display: inline-block; background: var(--sky-tint); color: var(--sky-dark); font-size: 0.75rem; font-weight: 700; padding: 0.2em 0.7em; border-radius: var(--radius-pill); }
hr.rule { border: none; border-top: 1px solid var(--border); margin: var(--space-6) 0; }