/* ==========================================================================
   Reusables365 — design system
   Concept: an old ironmonger's ledger meets a modern instrument panel.
   Reusable goods are metal, wax, cork, bamboo, cotton — materials that
   patina and wear well. Palette: oxidised copper (verdigris), aged brass
   hardware, and the rust of things left to rot.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400..700;1,9..144,400..700&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* surfaces */
  --ink:            #161C1A;
  --ink-2:          #1E2624;
  --ink-3:          #2A3431;
  --ink-4:          #3A4643;
  --paper:          #F4EFE3;
  --paper-dim:      #EAE0CB;
  --paper-line:     #D6C6A2;
  --paper-hair:     #C4B08A;

  /* accents */
  --verdigris:       #5B8C7B;
  --verdigris-deep:  #3B6155;
  --verdigris-bright:#8DC0AC;
  --brass:           #C9A24B;
  --brass-bright:    #E8C87E;
  --rust:            #A6553C;
  --rust-bright:     #C87F62;

  /* text */
  --ink-text:       #262220;
  --ink-text-dim:   #6A6152;
  --paper-text:     #F0EAD9;
  --paper-text-dim: #A8A392;

  --radius-sm: 3px;
  --radius-md: 8px;
  --container: 1200px;

  /* type */
  --font-display: 'Fraunces', 'Lora', Georgia, serif;
  --font-body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, 'Courier New', monospace;

  --shadow-card: 0 1px 2px rgba(38,34,32,.05), 0 8px 24px -12px rgba(38,34,32,.18);
  --shadow-lift: 0 2px 4px rgba(38,34,32,.06), 0 18px 40px -16px rgba(38,34,32,.28);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: 84px; }

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink-text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* paper grain — the one texture, applied globally, never interactive */
body::after{
  content: "";
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  opacity: .05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

img, svg{ max-width: 100%; }
img{ display: block; height: auto; }
a{ color: inherit; }

.wrap{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 30px;
}
.wrap-narrow{ max-width: 800px; margin: 0 auto; }

h1, h2, h3, h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.015em;
  font-variation-settings: 'opsz' 100;
}
h3{ font-size: 1.2rem; }
em.wonk{ font-style: italic; font-variation-settings: 'opsz' 144; }

p{ margin: 0 0 1em; }
p:last-child{ margin-bottom: 0; }

/* ---------------------------------- eyebrow -------------------------------- */
.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--verdigris-deep);
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 500;
}
.eyebrow::before{
  content: "";
  width: 22px;
  height: 1px;
  background: var(--brass);
  flex-shrink: 0;
}
.bg-ink .eyebrow, .hero .eyebrow, .simple-hero .eyebrow{ color: var(--brass-bright); }
.bg-ink .eyebrow::before, .hero .eyebrow::before, .simple-hero .eyebrow::before{ background: var(--verdigris); }

/* ------------------------------------ nav ---------------------------------- */
.site-nav{
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(244,239,227,.9);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--paper-line);
}
.site-nav > .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 13px;
  padding-bottom: 13px;
  gap: 26px;
}
.brand{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20.5px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink-text);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}
.brand .mark{ width: 26px; height: 26px; flex-shrink: 0; }
.brand b{ font-weight: 600; }
.brand i{
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--verdigris-deep);
  letter-spacing: 0;
}

.nav-links{
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14.5px;
  font-weight: 500;
}
.nav-links a{
  text-decoration: none;
  color: var(--ink-text);
  padding-bottom: 3px;
  background-image: linear-gradient(var(--verdigris), var(--verdigris));
  background-size: 0% 1.5px;
  background-repeat: no-repeat;
  background-position: left bottom;
  transition: background-size .25s ease, color .2s ease;
}
.nav-links a:hover{ background-size: 100% 1.5px; color: var(--verdigris-deep); }

.region-toggle{
  display: inline-flex;
  border: 1px solid var(--ink-text);
  border-radius: 999px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  flex-shrink: 0;
}
.region-toggle button{
  background: transparent;
  border: 0;
  padding: 7px 15px;
  cursor: pointer;
  color: var(--ink-text);
  font-family: inherit;
  font-size: inherit;
  font-weight: 500;
  transition: background .2s ease, color .2s ease;
}
.region-toggle button.active{ background: var(--ink-text); color: var(--paper); }

.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--ink-text);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 38px;
  cursor: pointer;
  color: var(--ink-text);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-toggle svg{ width: 19px; height: 19px; }

/* ------------------------------------ hero --------------------------------- */
.hero{
  position: relative;
  background:
    radial-gradient(1100px 620px at 78% 42%, rgba(91,140,123,.22), transparent 62%),
    radial-gradient(760px 500px at 12% 8%, rgba(201,162,75,.09), transparent 60%),
    var(--ink);
  color: var(--paper-text);
  padding: 86px 0 78px;
  overflow: hidden;
}
.hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(240,234,217,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240,234,217,.032) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 78%);
  pointer-events: none;
}
.hero > .wrap{
  position: relative;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 54px;
  align-items: center;
}
.hero h1{
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--paper-text);
  margin: 20px 0 22px;
  letter-spacing: -0.03em;
}
.hero h1 em{
  font-style: italic;
  color: var(--verdigris-bright);
  font-variation-settings: 'opsz' 144;
}
.hero .lede{
  font-size: 18px;
  color: var(--paper-text-dim);
  max-width: 47ch;
  margin-bottom: 32px;
}
.cta-row{ display: flex; gap: 13px; flex-wrap: wrap; }

.trust-line{
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(240,234,217,.13);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--paper-text-dim);
}
.trust-line span{ display: inline-flex; align-items: center; gap: 7px; }
.trust-line svg{ width: 13px; height: 13px; color: var(--verdigris-bright); flex-shrink: 0; }

/* buttons */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn svg{ width: 15px; height: 15px; }
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--verdigris); color: var(--ink); }
.btn-primary:hover{ background: var(--verdigris-bright); box-shadow: 0 8px 26px -10px rgba(141,192,172,.7); }
.btn-ghost{ background: transparent; border-color: rgba(240,234,217,.34); color: var(--paper-text); }
.btn-ghost:hover{ border-color: var(--brass-bright); color: var(--brass-bright); }
.btn-dark{ background: var(--ink); color: var(--paper-text); }
.btn-dark:hover{ background: var(--ink-3); }

/* hero gauge */
.gauge-wrap{ position: relative; display: flex; align-items: center; justify-content: center; }
.gauge-figure{ width: min(100%, 430px); overflow: visible; }
.gauge-readout{
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -104%);
  text-align: center;
  pointer-events: none;
  width: 100%;
}
.gauge-readout .num{
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6.4vw, 3.4rem);
  font-weight: 600;
  color: var(--brass-bright);
  line-height: 1;
  letter-spacing: -.02em;
}
.gauge-readout .cap{
  font-size: 12.5px;
  color: var(--paper-text-dim);
  max-width: 17ch;
  margin: 11px auto 0;
  line-height: 1.4;
}
.gauge-key{
  position: absolute;
  bottom: -6px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .05em;
  color: var(--paper-text-dim);
  white-space: nowrap;
}
.gauge-key i{ width: 8px; height: 8px; border-radius: 2px; display: inline-block; margin-right: 6px; }

/* --------------------------------- stat strip ------------------------------ */
.stat-strip{ padding: 60px 0; }
.stat-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.stat-card{
  background: var(--paper);
  padding: 28px 24px 26px;
  transition: background .25s ease;
}
.stat-card:hover{ background: #F8F4EA; }
.stat-card .num{
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 3.1vw, 2.45rem);
  font-weight: 600;
  color: var(--verdigris-deep);
  letter-spacing: -.02em;
  line-height: 1;
}
.stat-card .lbl{ font-size: 13.5px; color: var(--ink-text-dim); margin-top: 12px; line-height: 1.5; }
.stat-card .src{
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .04em;
  color: var(--ink-text-dim);
  opacity: .72;
  margin-top: 14px;
  display: block;
  padding-top: 11px;
  border-top: 1px dashed var(--paper-line);
}

/* ------------------------------- section shells ---------------------------- */
section{ padding: 92px 0; }
.section-head{ max-width: 660px; margin-bottom: 48px; }
.section-head h2{ font-size: clamp(1.85rem, 3.3vw, 2.55rem); margin: 16px 0 18px; }
.section-head p{ color: var(--ink-text-dim); font-size: 17px; }
.bg-dim{ background: var(--paper-dim); }
.bg-ink{
  background:
    radial-gradient(900px 500px at 88% 0%, rgba(91,140,123,.14), transparent 62%),
    var(--ink);
  color: var(--paper-text);
}
.bg-ink .section-head p{ color: var(--paper-text-dim); }
.bg-ink h2, .bg-ink h3{ color: var(--paper-text); }

/* -------------------------------- why it matters --------------------------- */
.matters-grid{
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 58px;
  align-items: start;
}
.matters-grid .copy h3{ margin: 30px 0 12px; font-size: 1.22rem; }
.matters-grid .copy h3:first-child{ margin-top: 0; }
.dropcap::first-letter{
  font-family: var(--font-display);
  font-size: 3.3em;
  line-height: .82;
  float: left;
  padding: 6px 12px 0 0;
  color: var(--verdigris-deep);
  font-weight: 600;
}

.callout{
  border: 1px solid var(--ink-text);
  border-radius: var(--radius-md);
  padding: 30px 28px 26px;
  background: var(--paper);
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 100px;
}
.bg-dim .callout{ background: var(--paper); }
.callout .figures{ display: flex; align-items: baseline; gap: 10px; margin: 18px 0 4px; }
.callout .big{ font-family: var(--font-mono); font-size: 2.7rem; font-weight: 600; color: var(--rust); line-height: 1; }
.callout .arrow{ color: var(--brass); font-size: 1.3rem; }
.callout .to{ font-family: var(--font-mono); font-size: 1.35rem; font-weight: 600; color: var(--verdigris-deep); }
.callout p{ font-size: 14.5px; color: var(--ink-text-dim); margin-top: 16px; }
.callout .fine{ font-size: 12.5px; margin-top: 14px; border-top: 1px dashed var(--paper-line); padding-top: 14px; }

/* usage comparison bars */
.compare{ margin-top: 46px; padding-top: 34px; border-top: 1px solid var(--paper-line); }
.compare h3{ font-size: 1.1rem; margin-bottom: 22px; }
.compare-row{ display: flex; align-items: center; gap: 16px; margin-bottom: 15px; }
.compare-row .tag{ width: 168px; flex-shrink: 0; font-family: var(--font-mono); font-size: 12px; color: var(--ink-text-dim); }
.compare-row .bar-track{ flex: 1; height: 11px; background: rgba(198,176,138,.42); border-radius: 999px; overflow: hidden; min-width: 60px; }
.compare-row .bar-fill{ height: 100%; border-radius: 999px; width: 0; transition: width 1.1s cubic-bezier(.22,.68,.3,1); }
.compare-row.rust .bar-fill{ background: linear-gradient(90deg, var(--rust), var(--rust-bright)); }
.compare-row.verdigris .bar-fill{ background: linear-gradient(90deg, var(--verdigris-deep), var(--verdigris-bright)); }
.compare-row .val{ width: 108px; text-align: right; font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-text-dim); flex-shrink: 0; }

/* ---------------------------------- calculator ------------------------------ */
.calc{
  border: 1px solid var(--paper-hair);
  border-radius: var(--radius-md);
  background: var(--paper);
  padding: 36px;
  box-shadow: var(--shadow-card);
}
.calc-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-bottom: 30px; }
.calc-field label{ display: block; font-size: 13px; color: var(--ink-text-dim); margin-bottom: 9px; }
.calc-field input{
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--paper-hair);
  background: #FBF8F1;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink-text);
  border-radius: var(--radius-sm);
  transition: border-color .2s ease;
}
.calc-field input:hover{ border-color: var(--verdigris); }
.calc-result{
  display: flex;
  flex-wrap: wrap;
  gap: 44px;
  align-items: baseline;
  border-top: 1px dashed var(--paper-line);
  padding-top: 26px;
}
.calc-result .num{ font-family: var(--font-mono); font-size: 2.25rem; font-weight: 600; color: var(--verdigris-deep); line-height: 1; letter-spacing: -.02em; }
.calc-result .lbl{ font-size: 12.5px; color: var(--ink-text-dim); margin-top: 8px; max-width: 24ch; }
.calc-note{ font-size: 12px; color: var(--ink-text-dim); margin-top: 22px; line-height: 1.55; }

/* ------------------------------------ the edit ------------------------------ */
.category-list{
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.category{
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s ease;
}
.category[open]{ border-color: var(--ink-4); }
.category-head{
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px;
  cursor: pointer;
  color: var(--paper-text);
  transition: background .2s ease;
}
.category-head::-webkit-details-marker{ display: none; }
.category-head::marker{ content: ""; }
.category-head:hover{ background: rgba(240,234,217,.035); }
.category-head .left{ display: flex; align-items: center; gap: 20px; min-width: 0; }
.category-head .icon{ width: 36px; height: 36px; flex-shrink: 0; color: var(--brass-bright); }
.category-head .title{ font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; display: block; letter-spacing: -.015em; }
.category-head .sub{ font-size: 13px; color: var(--paper-text-dim); margin-top: 4px; }
.category-head .chev{ color: var(--verdigris-bright); transition: transform .25s ease; flex-shrink: 0; width: 20px; height: 20px; }
.category[open] .category-head .chev{ transform: rotate(45deg); }

.product-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--ink-3);
  border-top: 1px solid var(--ink-3);
}
.product-card{
  background: var(--ink-2);
  padding: 26px 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background .25s ease;
}
.product-card:hover{ background: #232C2A; }
.product-illo{
  width: 60px;
  height: 60px;
  color: var(--verdigris-bright);
  margin-bottom: 4px;
  transition: color .25s ease, transform .3s ease;
}
.product-card:hover .product-illo{ color: var(--brass-bright); transform: translateY(-2px); }
.product-card .pname{ font-family: var(--font-display); font-weight: 600; color: var(--paper-text); font-size: 1.06rem; letter-spacing: -.01em; }
.product-card .pdesc{ font-size: 13.5px; color: var(--paper-text-dim); flex: 1; line-height: 1.55; }
.product-card .pswap{
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--brass);
  padding-top: 12px;
  border-top: 1px solid rgba(240,234,217,.09);
}
.buy-row{ display: flex; gap: 9px; margin-top: 6px; }
.buy-btn{
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  padding: 11px 8px;
  border: 1px solid rgba(141,192,172,.5);
  color: var(--paper-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.buy-btn:hover{ background: var(--verdigris); border-color: var(--verdigris); color: var(--ink); }
.buy-btn.preferred{ background: var(--brass); border-color: var(--brass); color: var(--ink); font-weight: 600; }
.buy-btn.preferred:hover{ background: var(--brass-bright); border-color: var(--brass-bright); }

/* ------------------------------------- ledger -------------------------------- */
.ledger{ border-top: 2px solid var(--ink-text); }
.ledger-row{
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 30px;
  padding: 26px 0;
  border-bottom: 1px solid var(--paper-line);
  transition: background .2s ease;
}
.ledger-row:hover{ background: rgba(255,255,255,.36); }
.ledger-row .mat{ display: flex; align-items: baseline; gap: 10px; }
.ledger-row .swatch{ width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; transform: translateY(-1px); }
.ledger-row .mat span{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--verdigris-deep);
  letter-spacing: .05em;
  text-transform: uppercase;
  font-weight: 500;
}
.ledger-row .note{ font-size: 15.5px; color: var(--ink-text); }
.ledger-row .note b{ color: var(--verdigris-deep); font-weight: 600; }

/* --------------------------------- habits / tips ----------------------------- */
.tips-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tip{
  background: var(--paper);
  border: 1px solid var(--paper-hair);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
}
.tip:hover{ transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.tip .n{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--brass);
  font-weight: 600;
}
.tip h3{ font-size: 1.14rem; margin: 12px 0 10px; }
.tip p{ font-size: 14.5px; color: var(--ink-text-dim); }

/* ------------------------------------- FAQ ------------------------------------ */
.faq-list{ border-top: 2px solid var(--ink-text); }
.faq-item{ border-bottom: 1px solid var(--paper-line); }
.faq-item summary{
  list-style: none;
  cursor: pointer;
  padding: 24px 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink-text);
  letter-spacing: -.01em;
  transition: color .2s ease;
}
.faq-item summary:hover{ color: var(--verdigris-deep); }
.faq-item summary::-webkit-details-marker{ display: none; }
.faq-item summary::marker{ content: ""; }
.faq-item summary .plus{
  font-family: var(--font-mono);
  color: var(--verdigris-deep);
  font-size: 1.35rem;
  flex-shrink: 0;
  line-height: 1;
  transition: transform .25s ease;
}
.faq-item[open] summary .plus{ transform: rotate(45deg); }
.faq-item .a{ padding: 0 0 26px; color: var(--ink-text-dim); font-size: 15.5px; max-width: 72ch; }
.faq-item .a a{ color: var(--verdigris-deep); text-underline-offset: 3px; }

/* ----------------------------------- disclosure ------------------------------- */
.disclosure-strip{
  background: var(--ink-2);
  color: var(--paper-text-dim);
  padding: 32px 0;
  font-size: 13.5px;
  border-top: 1px solid var(--ink-3);
}
.disclosure-strip .wrap{ display: flex; gap: 18px; align-items: flex-start; }
.disclosure-strip svg{ width: 20px; height: 20px; color: var(--brass); flex-shrink: 0; margin-top: 2px; }
.disclosure-strip strong{ color: var(--brass-bright); font-weight: 600; }
.disclosure-strip a{ color: var(--verdigris-bright); text-underline-offset: 3px; }

/* -------------------------------------- footer -------------------------------- */
footer{ background: var(--ink); color: var(--paper-text-dim); padding: 58px 0 36px; }
.foot-grid{ display: flex; justify-content: space-between; flex-wrap: wrap; gap: 40px; padding-bottom: 34px; border-bottom: 1px solid var(--ink-3); }
.foot-brand .brand{ color: var(--paper-text); }
.foot-brand .brand i{ color: var(--verdigris-bright); }
.foot-brand p{ font-size: 13.5px; max-width: 36ch; margin-top: 14px; line-height: 1.6; }
.foot-links{ display: flex; gap: 56px; flex-wrap: wrap; }
.foot-links h4{ font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--paper-text); margin-bottom: 15px; font-weight: 600; }
.foot-links ul{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.foot-links a{ font-size: 13.5px; text-decoration: none; color: var(--paper-text-dim); transition: color .2s ease; }
.foot-links a:hover{ color: var(--verdigris-bright); }
.foot-bottom{ display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 26px; font-size: 12.5px; }
.foot-bottom a{ color: var(--paper-text-dim); text-decoration: none; }
.foot-bottom a:hover{ color: var(--verdigris-bright); }

/* ------------------------------- simple content pages -------------------------- */
.simple-hero{
  background: radial-gradient(800px 400px at 20% 0%, rgba(91,140,123,.16), transparent 62%), var(--ink);
  color: var(--paper-text);
  padding: 68px 0 54px;
}
.simple-hero h1{ color: var(--paper-text); font-size: clamp(2.1rem, 4.4vw, 2.9rem); margin-top: 16px; }
.simple-hero .updated{ font-family: var(--font-mono); font-size: 12px; color: var(--paper-text-dim); margin-top: 16px; }
.simple-body{ padding: 60px 0 56px; }
.simple-body .wrap{ max-width: 820px; }
.simple-body h2{ font-size: 1.42rem; margin: 44px 0 15px; }
.simple-body h2:first-child{ margin-top: 0; }
.simple-body p, .simple-body li{ font-size: 16px; color: var(--ink-text); }
.simple-body ul{ padding-left: 22px; }
.simple-body li{ margin-bottom: 9px; }
.simple-body a{ color: var(--verdigris-deep); text-underline-offset: 3px; }

.breadcrumb{ font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--paper-text-dim); margin-bottom: 6px; }
.breadcrumb a{ color: var(--verdigris-bright); text-decoration: none; }
.breadcrumb a:hover{ text-decoration: underline; }
.breadcrumb span{ opacity: .5; margin: 0 8px; }

/* ---------------------------------- scroll reveal ------------------------------ */
.reveal{ opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in{ opacity: 1; transform: none; }

.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper-text);
  padding: 12px 18px;
  z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus{ left: 0; }

.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;
}

/* ------------------------------------ responsive -------------------------------- */
@media (max-width: 980px){
  .hero > .wrap{ grid-template-columns: 1fr; gap: 40px; }
  .gauge-wrap{ order: -1; }
  .gauge-figure{ max-width: 320px; }
  .stat-grid{ grid-template-columns: repeat(2, 1fr); }
  .matters-grid{ grid-template-columns: 1fr; gap: 40px; }
  .callout{ position: static; }
  .product-grid{ grid-template-columns: repeat(2, 1fr); }
  .calc-grid{ grid-template-columns: repeat(2, 1fr); }
  .tips-grid{ grid-template-columns: 1fr; }
  .ledger-row{ grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 720px){
  .nav-links, .region-toggle{ display: none; }
  .nav-toggle{ display: inline-flex; }
  body.nav-open .nav-links{
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--paper-line);
    padding: 20px 30px 10px;
    gap: 18px;
  }
  body.nav-open .region-toggle{
    display: inline-flex;
    position: absolute;
    top: 100%;
    left: 30px;
    margin-top: 148px;
  }
  .hero{ padding: 56px 0 52px; }
  section{ padding: 64px 0; }
  .product-grid{ grid-template-columns: 1fr; }
  .calc-grid{ grid-template-columns: 1fr 1fr; }
  .calc{ padding: 26px 22px; }
  .stat-grid{ grid-template-columns: 1fr; }
  .compare-row{ flex-wrap: wrap; }
  .compare-row .tag{ width: 100%; }
  .compare-row .val{ width: auto; }
  .foot-links{ gap: 34px; }
  .disclosure-strip .wrap{ flex-direction: column; gap: 12px; }
}

/* ------------------------------------ a11y basics -------------------------------- */
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible{
  outline: 2px solid var(--verdigris);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal{ opacity: 1; transform: none; }
}

@media print{
  .site-nav, .gauge-wrap, .cta-row, .calc, footer{ display: none; }
  body{ background: #fff; }
  body::after{ display: none; }
}