/* ==========================================================================
   Waterwal — mock-up stylesheet
   Calm / reassuring / premium. Light-committed palette, generous whitespace.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --paper:      #FAF8F5;
  --paper-2:    #F2EDE6;
  --paper-3:    #EAE3D9;
  --card:       #FFFFFF;

  --ink:        #0F171C;
  --ink-2:      #47545E;
  --ink-3:      #7B8790;

  --marine:     #0E3A4E;
  --marine-2:   #17566F;
  --aqua:       #6FA8BC;
  --aqua-soft:  #DCEAEF;
  --sand:       #E3D8C6;

  --line:       rgba(15, 23, 28, 0.10);
  --line-soft:  rgba(15, 23, 28, 0.06);

  --shadow-sm:  0 1px 2px rgba(14, 58, 78, .05), 0 2px 8px rgba(14, 58, 78, .04);
  --shadow-md:  0 2px 4px rgba(14, 58, 78, .05), 0 12px 32px rgba(14, 58, 78, .07);
  --shadow-lg:  0 4px 8px rgba(14, 58, 78, .05), 0 24px 64px rgba(14, 58, 78, .10);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;

  --gutter: clamp(20px, 5vw, 64px);
  --maxw: 1180px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 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; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "cv02","cv03","cv04","ss01";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { max-width: 100%; }
figure, blockquote, dl, dd { margin: 0; }
h1, h2, h3, h4 { margin: 0; line-height: 1.12; letter-spacing: -0.02em; font-weight: 600; }
p { margin: 0; }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }

::selection { background: var(--aqua-soft); color: var(--marine); }

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

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 820px; }

section { position: relative; }
.section { padding-block: clamp(72px, 11vw, 148px); }
.section--tight { padding-block: clamp(56px, 8vw, 104px); }
.section--paper2 { background: var(--paper-2); }
.section--marine { background: var(--marine); color: #F3F7F8; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--aqua);
}
.section--marine .eyebrow { color: rgba(243,247,248,.62); }
.section--marine .eyebrow::before { background: var(--aqua); }

.display {
  font-family: var(--serif);
  font-weight: 400;
  font-optical-sizing: auto;
  letter-spacing: -0.025em;
  line-height: 1.04;
}
h2.display { font-size: clamp(32px, 4.6vw, 54px); }
.lede {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 56ch;
}
.section--marine .lede { color: rgba(243,247,248,.78); }

.mt-s { margin-top: 14px; }
.mt-m { margin-top: 24px; }
.mt-l { margin-top: 44px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 100px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 550;
  letter-spacing: -0.005em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .25s var(--ease), background .25s var(--ease),
              box-shadow .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--marine); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--marine-2); box-shadow: var(--shadow-md); }

.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--marine); background: rgba(14,58,78,.03); }

.btn--light { background: #fff; color: var(--marine); }
.btn--light:hover { background: #fff; box-shadow: var(--shadow-md); }

.btn--onmarine-ghost { background: transparent; color: #F3F7F8; border-color: rgba(243,247,248,.28); }
.btn--onmarine-ghost:hover { border-color: rgba(243,247,248,.6); background: rgba(255,255,255,.06); }

.btn--lg { padding: 17px 34px; font-size: 16px; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: .45; pointer-events: none; }

.btn .arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(250, 248, 245, 0.72);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.is-stuck {
  border-bottom-color: var(--line-soft);
  background: rgba(250, 248, 245, 0.88);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.brand-mark { flex: none; }
.brand-name { color: var(--ink); }
.brand-name em { font-style: normal; color: var(--aqua); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  text-decoration: none;
  font-size: 15px;
  color: var(--ink-2);
  transition: color .2s var(--ease);
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute; left: 0; bottom: -5px;
  width: 100%; height: 1px;
  background: var(--marine);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.language-picker select {
  appearance: none;
  min-width: 58px;
  padding: 8px 26px 8px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: var(--paper) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='m1 1 4 4 4-4' fill='none' stroke='%2347545E' stroke-width='1.4'/%3E%3C/svg%3E") no-repeat right 10px center;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.language-picker select:hover { border-color: var(--marine); }
.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;
}

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--line);
  border-radius: 100px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 16px; height: 1.5px; background: var(--ink);
  position: relative; transition: background .2s var(--ease);
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1.5px; background: var(--ink);
  transition: transform .3s var(--ease);
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after  { top:  5px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-actions .btn--ghost { display: none; }
  .mobile-menu.is-open + .nav-links { display: none; }
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
  padding-block: 12px 24px;
}
.mobile-menu.is-open { display: block; }
.mobile-menu ul { list-style: none; margin: 0; padding: 0; }
.mobile-menu a {
  display: block;
  padding: 13px 0;
  text-decoration: none;
  font-size: 18px;
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(48px, 7vw, 92px) clamp(56px, 8vw, 104px);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: auto -20% -60% 30%;
  height: 620px;
  background: radial-gradient(closest-side, rgba(111,168,188,.24), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  position: relative;
}
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(42px, 6.6vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.03em;
}
.hero h1 em {
  font-style: italic;
  color: var(--marine-2);
}
.hero .lede { margin-top: 26px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px 7px 7px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.7);
  border-radius: 100px;
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 28px;
}
.hero-badge b {
  background: var(--marine);
  color: #fff;
  font-weight: 550;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
}

.hero-note {
  display: flex; align-items: center; gap: 9px;
  margin-top: 22px;
  font-size: 14px; color: var(--ink-3);
}

/* Hero illustration */
.hero-art {
  position: relative;
  border-radius: var(--r-xl);
  background: linear-gradient(170deg, #FFFFFF, #F1EDE6);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  overflow: hidden;
}
.hero-art svg { display: block; width: 100%; height: auto; border-radius: calc(var(--r-xl) - 10px); }

.wave-a, .wave-b { animation: drift 9s ease-in-out infinite alternate; transform-origin: center; }
.wave-b { animation-duration: 7s; animation-direction: alternate-reverse; }
@keyframes drift {
  from { transform: translateX(-10px); }
  to   { transform: translateX(10px); }
}
@media (prefers-reduced-motion: reduce) {
  .wave-a, .wave-b { animation: none; }
}

.art-caption {
  position: absolute;
  left: 20px; top: 20px;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-soft);
  border-radius: 100px;
  padding: 8px 15px;
  font-size: 13px;
  color: var(--ink-2);
  box-shadow: var(--shadow-sm);
}

/* ---------- Stat strip ---------- */
.stat-strip {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255,255,255,.5);
}
.stat-strip .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  padding-block: 38px;
}
@media (max-width: 760px) { .stat-strip .wrap { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; } }

.stat .n {
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--marine);
}
.stat .n small { font-size: .5em; letter-spacing: 0; margin-left: 2px; color: var(--ink-2); }
.stat .l {
  margin-top: 9px;
  font-size: 13.5px;
  color: var(--ink-3);
  letter-spacing: .01em;
}

/* ---------- Generic cards ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card h3 { font-size: 20px; margin-bottom: 10px; letter-spacing: -0.015em; }
.card p { color: var(--ink-2); font-size: 15.5px; }

.card-ico {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--aqua-soft);
  color: var(--marine);
  margin-bottom: 20px;
}

/* ---------- Problem / contrast ---------- */
.contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 52px;
}
@media (max-width: 860px) { .contrast { grid-template-columns: 1fr; } }

.panel {
  border-radius: var(--r-lg);
  padding: 34px;
  border: 1px solid var(--line-soft);
}
.panel--old { background: var(--paper-3); }
.panel--new { background: var(--marine); color: #F3F7F8; border-color: transparent; }
.panel h3 {
  font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  font-weight: 600; color: var(--ink-3); margin-bottom: 22px;
}
.panel--new h3 { color: var(--aqua); }
.panel ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 15px; }
.panel li { display: flex; gap: 13px; align-items: flex-start; font-size: 15.5px; line-height: 1.5; }
.panel--old li { color: var(--ink-2); }
.panel--new li { color: rgba(243,247,248,.86); }
.tick { flex: none; margin-top: 3px; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; gap: 16px; grid-template-columns: repeat(3, 1fr); margin-top: 54px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  padding: 32px 30px 34px;
  position: relative;
  overflow: hidden;
}
.step::after {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  right: 20px; top: 14px;
  font-family: var(--serif);
  font-size: 62px;
  color: rgba(14,58,78,.06);
  letter-spacing: -0.04em;
}
.step h3 { font-size: 21px; margin-bottom: 11px; }
.step p { color: var(--ink-2); font-size: 15.5px; }
.step .t {
  display: inline-block; margin-top: 18px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--marine); background: var(--aqua-soft);
  padding: 5px 11px; border-radius: 100px;
}

/* ---------- Space comparison (the USP block) ---------- */
.compare {
  margin-top: 54px;
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.compare-head {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 18px; padding: 26px 30px; border-bottom: 1px solid var(--line-soft);
}
.compare-head p { font-size: 15px; color: var(--ink-2); }

.segmented {
  display: inline-flex;
  padding: 4px;
  background: var(--paper-2);
  border-radius: 100px;
  border: 1px solid var(--line-soft);
}
.segmented button {
  border: 0; background: transparent; cursor: pointer;
  padding: 9px 20px; border-radius: 100px;
  font-size: 14px; font-weight: 550; color: var(--ink-2);
  transition: background .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease);
}
.segmented button[aria-selected="true"] {
  background: var(--card); color: var(--marine); box-shadow: var(--shadow-sm);
}

.compare-body {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 0;
}
@media (max-width: 860px) { .compare-body { grid-template-columns: 1fr; } }

.compare-visual {
  padding: 40px 30px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #FCFBF9, #F4F0E9);
  border-right: 1px solid var(--line-soft);
  min-height: 300px;
}
@media (max-width: 860px) { .compare-visual { border-right: 0; border-bottom: 1px solid var(--line-soft); } }

.volume {
  display: grid;
  gap: 4px;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.volume.fade { opacity: 0; transform: translateY(6px); }
.vol-row { display: flex; gap: 4px; }
.vol-unit {
  border-radius: 3px;
  transition: all .4s var(--ease);
}
.vol-legend { margin-top: 20px; text-align: center; font-size: 13px; color: var(--ink-3); }

.compare-facts { padding: 34px 30px; display: grid; align-content: center; gap: 0; }
.fact {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 15px 0; border-bottom: 1px dashed var(--line);
}
.fact:last-child { border-bottom: 0; }
.fact dt { font-size: 14.5px; color: var(--ink-3); }
.fact dd {
  margin: 0; font-family: var(--serif); font-size: 23px; letter-spacing: -0.02em;
  color: var(--marine); text-align: right;
}

/* ---------- Use cases ---------- */
.use {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--card);
  padding: 32px 30px;
  min-height: 260px;
  display: flex; flex-direction: column; justify-content: flex-end;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.use:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.use .use-art { position: absolute; inset: 0; opacity: .9; }
.use h3 { font-size: 20px; margin-bottom: 8px; position: relative; }
.use p { font-size: 15px; color: var(--ink-2); position: relative; }

/* ---------- Specs ---------- */
.specs {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 48px;
}
@media (max-width: 760px) { .specs { grid-template-columns: 1fr; gap: 0; } }
.spec {
  display: flex; align-items: baseline; justify-content: space-between; gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(243,247,248,.14);
}
.spec dt { font-size: 14.5px; color: rgba(243,247,248,.58); }
.spec dd { margin: 0; font-size: 15.5px; text-align: right; font-weight: 500; }

/* ---------- Quotes ---------- */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 50px; }
@media (max-width: 900px) { .quotes { grid-template-columns: 1fr; } }
.quote {
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  padding: 30px;
  display: flex; flex-direction: column; gap: 20px;
}
.quote blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.quote figcaption { font-size: 13.5px; color: var(--ink-3); margin-top: auto; }
.quote figcaption b { display: block; color: var(--ink); font-weight: 550; font-size: 14.5px; }

/* ---------- FAQ ---------- */
.faq { margin-top: 44px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 24px 0;
  background: none; border: 0; cursor: pointer;
  text-align: left;
  font-size: 18px; font-weight: 500; letter-spacing: -0.015em;
  transition: color .2s var(--ease);
}
.faq-q:hover { color: var(--marine-2); }
.faq-sign { flex: none; position: relative; width: 16px; height: 16px; }
.faq-sign::before, .faq-sign::after {
  content: ""; position: absolute; background: var(--marine);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.faq-sign::before { left: 0; top: 7.5px; width: 16px; height: 1.5px; }
.faq-sign::after  { top: 0; left: 7.5px; height: 16px; width: 1.5px; }
.faq-item.is-open .faq-sign::after { transform: scaleY(0); }
.faq-a {
  overflow: hidden;
  max-height: 0;
  transition: max-height .4s var(--ease);
}
.faq-a > div { padding-bottom: 26px; color: var(--ink-2); font-size: 16px; max-width: 68ch; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: var(--marine);
  color: #F3F7F8;
}
.cta-band .wrap { position: relative; text-align: center; padding-block: clamp(72px, 10vw, 128px); }
.cta-band h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 5vw, 60px); }
.cta-band .lede { margin: 22px auto 0; text-align: center; color: rgba(243,247,248,.80); }
.cta-band .btn-row { justify-content: center; margin-top: 38px; }
.cta-waves { position: absolute; left: 0; right: 0; bottom: -2px; width: 100%; opacity: .3; pointer-events: none; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
  padding-block: 56px 36px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 36px;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 {
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 16px; font-weight: 600;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.footer-grid a { text-decoration: none; transition: color .2s var(--ease); }
.footer-grid a:hover { color: var(--marine); }
.footer-bottom {
  margin-top: 44px; padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
  font-size: 13px; color: var(--ink-3);
}

/* ---------- Mock-up notice ---------- */
.mock-note {
  background: var(--sand);
  color: #493D24;
  font-size: 13px;
  text-align: center;
  padding: 9px 16px;
  letter-spacing: .01em;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   Buy page
   ========================================================================== */
.buy-hero { padding-block: clamp(44px, 6vw, 76px) 0; }
.buy-hero h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(36px, 5vw, 58px); letter-spacing: -0.03em;
}

.buy-layout {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: clamp(24px, 3.5vw, 48px);
  align-items: start;
  padding-top: clamp(38px, 5vw, 60px);
  padding-bottom: clamp(70px, 9vw, 120px);
}
@media (max-width: 960px) { .buy-layout { grid-template-columns: 1fr; } }

.block-title {
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin-bottom: 18px;
  display: flex; align-items: center; gap: 10px;
}
.block-title .num {
  width: 22px; height: 22px; border-radius: 100px;
  background: var(--marine); color: #fff;
  display: grid; place-items: center; font-size: 11px; letter-spacing: 0;
}
.buy-block + .buy-block { margin-top: 44px; }

/* Tier cards */
.tiers { display: grid; gap: 14px; }
.tier {
  position: relative;
  display: grid;
  grid-template-columns: 26px 1fr auto;
  gap: 18px;
  align-items: start;
  text-align: left;
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 26px;
  cursor: pointer;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.tier:hover { border-color: var(--aqua); }
.tier[aria-checked="true"] {
  border-color: var(--marine);
  box-shadow: 0 0 0 1px var(--marine), var(--shadow-md);
}
.tier-radio {
  width: 20px; height: 20px; margin-top: 3px;
  border-radius: 100px; border: 1.5px solid var(--line);
  display: grid; place-items: center;
  transition: border-color .25s var(--ease);
}
.tier-radio::after {
  content: ""; width: 10px; height: 10px; border-radius: 100px;
  background: var(--marine); transform: scale(0);
  transition: transform .25s var(--ease);
}
.tier[aria-checked="true"] .tier-radio { border-color: var(--marine); }
.tier[aria-checked="true"] .tier-radio::after { transform: scale(1); }

.tier-name { font-size: 19px; font-weight: 600; letter-spacing: -0.015em; }
.tier-desc { font-size: 14.5px; color: var(--ink-2); margin-top: 6px; }
.tier-meta { font-size: 13px; color: var(--ink-3); margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px 16px; }
.tier-price { text-align: right; }
.tier-price .p { font-family: var(--serif); font-size: 28px; letter-spacing: -0.03em; color: var(--marine); }
.tier-price .u { font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }

.pill-best {
  position: absolute; top: -10px; right: 22px;
  background: var(--marine); color: #fff;
  font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 100px;
}
@media (max-width: 560px) {
  .tier { grid-template-columns: 22px 1fr; }
  .tier-price { grid-column: 2; text-align: left; margin-top: 12px; }
}

/* Calculator */
.calc {
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  padding: 26px;
}
.calc-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .calc-fields { grid-template-columns: 1fr; } }
.field label {
  display: block; font-size: 13px; color: var(--ink-3);
  margin-bottom: 8px; letter-spacing: .01em;
}
.field input, .field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 15px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--marine);
  box-shadow: 0 0 0 3px rgba(14,58,78,.09);
}
.calc-out {
  margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.calc-out .r { font-size: 15px; color: var(--ink-2); }
.calc-out .r b { font-family: var(--serif); font-size: 26px; color: var(--marine); letter-spacing: -0.02em; font-weight: 400; }

/* Quantity stepper */
.stepper {
  display: inline-flex; align-items: center; gap: 2px;
  border: 1px solid var(--line); border-radius: 100px; padding: 4px; background: var(--card);
}
.stepper button {
  width: 34px; height: 34px; border-radius: 100px; border: 0; background: transparent;
  cursor: pointer; font-size: 18px; color: var(--marine);
  transition: background .2s var(--ease);
}
.stepper button:hover { background: var(--paper-2); }
.stepper output { min-width: 40px; text-align: center; font-size: 16px; font-weight: 550; }

/* Summary */
.summary {
  position: sticky; top: 96px;
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-md);
  padding: 28px;
}
.summary h3 { font-size: 20px; letter-spacing: -0.015em; }
.sum-line {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 12px 0; font-size: 15px; color: var(--ink-2);
  border-bottom: 1px solid var(--line-soft);
}
.sum-line span:last-child { color: var(--ink); font-weight: 500; }
.sum-total {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-top: 18px; margin-top: 6px;
}
.sum-total .lbl { font-size: 15px; color: var(--ink-2); }
.sum-total .val { font-family: var(--serif); font-size: 34px; letter-spacing: -0.03em; color: var(--marine); }
.summary .btn { margin-top: 20px; }
.assurances { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 11px; font-size: 13.5px; color: var(--ink-2); }
.assurances li { display: flex; gap: 10px; align-items: flex-start; }

/* Checkout form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .span-2 { grid-column: span 2; }
@media (max-width: 620px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: span 1; }
}

/* Confirmation */
.confirm {
  display: none;
  text-align: center;
  padding: 44px 30px;
}
.confirm.is-on { display: block; }
.confirm-ico {
  width: 62px; height: 62px; border-radius: 100px;
  background: var(--aqua-soft); color: var(--marine);
  display: grid; place-items: center; margin: 0 auto 22px;
}
.confirm h3 { font-family: var(--serif); font-weight: 400; font-size: 28px; letter-spacing: -0.02em; }
.confirm p { color: var(--ink-2); margin-top: 12px; font-size: 15.5px; }

/* ---------- Volume comparison units ---------- */
.vol-unit {
  width: clamp(14px, 5vw, 26px);
  height: clamp(14px, 5vw, 26px);
  background: rgba(14, 58, 78, .07);
}
.vol-unit.on { background: var(--marine); }
.vol-unit.lead { background: var(--aqua); box-shadow: 0 0 0 3px rgba(111,168,188,.30); }