:root {
  --paper: #fbf6f5;
  --white: #fff;
  --grid-minor: rgba(196, 38, 56, 0.07);
  --grid-major: rgba(196, 38, 56, 0.16);
  --ink: #1b1e2b;
  --ink-2: #4e5366;
  --rule: #e6d3d3;
  --trace: #c42638;
  --save: #1d6b45;
  --monitor: #000;
  --bezel: #2a2d38;
  --on-dark: #eceef2;
  --on-dark-2: #a9adba;

  --display: "Barlow Semi Condensed", "Bahnschrift", "Arial Narrow", sans-serif;
  --text: "Source Serif 4", Georgia, serif;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --space: clamp(64px, 9vw, 120px);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--text);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0;
}
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4.2vw, 3.25rem); }
h3 { font-size: 1.5rem; line-height: 1.15; }
.h-small { font-size: 1.5rem; }

p { margin: 0 0 1em; }

a { color: inherit; }
:focus-visible { outline: 3px solid var(--trace); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* ECG paper: 1 mm minor squares, 5 mm major squares */
.hero, .connect, .faq, .pricing {
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px, 8px 8px, 8px 8px;
}

/* ---------- Buttons and links ---------- */
.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  font: 600 1.125rem/1 var(--display);
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 16px 26px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--trace); border-color: var(--trace); }
.btn-small { padding: 10px 16px; font-size: 1rem; }
.btn-light { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.btn-light:hover { background: #fff; border-color: #fff; color: var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { color: #fff; }
.btn-block { display: block; width: 100%; text-align: center; }

.link {
  font: 600 1.125rem/1 var(--display);
  text-decoration: underline;
  text-decoration-color: var(--trace);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}
.link:hover { color: var(--trace); }

.added { min-height: 1.5em; margin: 10px 0 0; font-size: 0.9375rem; color: var(--save); }
.added a { color: inherit; font-weight: 600; }
.note { color: var(--ink-2); font-size: 0.9375rem; border-left: 3px solid var(--trace); padding-left: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(251, 246, 245, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.header-row { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand {
  font: 700 1.75rem/1 var(--display);
  letter-spacing: -0.015em;
  text-decoration: none;
  margin: 0;
}
nav { margin-left: auto; }
nav ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
nav a, .cart-link { font: 500 1.0625rem/1 var(--display); text-decoration: none; color: var(--ink-2); }
nav a:hover, .cart-link:hover, nav a[aria-current] { color: var(--ink); }
nav a[aria-current] { text-decoration: underline; text-decoration-color: var(--trace); text-decoration-thickness: 2px; text-underline-offset: 6px; }
.cart-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--ink);
  font-weight: 600;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 8px 14px;
}
.cart-link[aria-current] { background: var(--ink); color: var(--paper); }
.badge {
  background: var(--trace); color: #fff;
  min-width: 22px; height: 22px; padding: 0 6px;
  border-radius: 11px;
  font-size: 0.875rem; line-height: 22px; text-align: center;
}

/* ---------- Hero ---------- */
.hero { padding-top: clamp(40px, 6vw, 80px); overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero h1 {
  font-size: clamp(3rem, 6.4vw, 5.5rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
  max-width: 9em;
}
.product-brand { display: flex; align-items: center; gap: 10px; font: 700 1.75rem/1 var(--display); margin-bottom: 20px; }
.lede { font-size: 1.25rem; color: var(--ink-2); max-width: 34em; margin-top: 28px; }
.hero-buy { margin-top: 32px; }
.price { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 14px; }
.price strong { font: 700 2.25rem/1 var(--display); }
.price span { color: var(--ink-2); }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 28px; margin-top: 8px; }

.monitor {
  margin: 0;
  background: var(--monitor);
  border-radius: 22px;
  padding: 12px;
  box-shadow: 0 0 0 10px var(--bezel), 0 30px 60px -30px rgba(27, 30, 43, 0.6);
}
.monitor img { border-radius: 12px; }
.monitor figcaption { color: var(--on-dark-2); font-size: 0.875rem; padding: 10px 6px 2px; }

/* Phonocardiogram */
.trace { position: relative; margin-top: clamp(40px, 6vw, 72px); height: 140px; }
.trace svg { width: 100%; height: 100%; display: block; clip-path: inset(0 100% 0 0); }
.trace path {
  fill: none;
  stroke: var(--trace);
  stroke-width: 2.25;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.trace.static svg { clip-path: none; }
.trace.draw svg { animation: draw 2.6s cubic-bezier(.45, .05, .35, 1) forwards; }
@keyframes draw { to { clip-path: inset(0 0 0 0); } }
.trace-labels span {
  position: absolute; top: 2px;
  font: italic 400 0.9375rem/1 var(--text);
  color: var(--ink-2);
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.6s 1s;
}
.trace.draw .trace-labels span, .trace.static .trace-labels span { opacity: 1; }

/* ---------- Bundle band (home) ---------- */
.bundle-band { background: var(--ink); color: var(--on-dark); padding: var(--space) 0; }
.bundle-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
.lede-dark { color: var(--on-dark-2); font-size: 1.1875rem; max-width: 32em; margin-top: 20px; }
.bundle-list { list-style: none; margin: 28px 0 0; padding: 0; max-width: 34em; }
.bundle-list li {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 12px 0; border-top: 1px solid #3a3e4e;
  font: 500 1.25rem/1.2 var(--display);
}
.bundle-list li span:last-child { color: var(--on-dark-2); }
.bundle-buy {
  background: var(--monitor);
  border-radius: 18px;
  box-shadow: 0 0 0 8px var(--bezel);
  padding: 32px;
}
.bundle-buy .was { color: var(--on-dark-2); margin: 0; }
.bundle-buy .now { font: 700 4rem/1 var(--display); margin: 8px 0; }
.bundle-buy .saves { font: 600 1.375rem/1.2 var(--display); color: #7fd6a6; margin-bottom: 24px; }
.bundle-buy .added { color: #7fd6a6; }

/* ---------- Product cards ---------- */
.shop { padding: var(--space) 0; }
.shop-tint { background: var(--white); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; margin-bottom: 36px; flex-wrap: wrap; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 32px); }
.card { display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
.card-img { display: block; background: var(--monitor); }
.card-body { padding: 22px 22px 18px; display: flex; flex-direction: column; flex: 1; }
.card h3 a { text-decoration: none; }
.card h3 a:hover { color: var(--trace); }
.card-body > p:not([class]) { color: var(--ink-2); font-size: 1rem; margin-top: 10px; }
.card-price { font: 700 1.875rem/1 var(--display); margin: auto 0 6px; padding-top: 10px; }
.card-price span { font: 400 1rem var(--text); color: var(--ink-2); }
.card-save { color: var(--save); font-size: 0.9375rem; margin-bottom: 14px; }
.card-actions { display: flex; align-items: center; gap: 20px; margin-top: 8px; }
.card-actions .link { font-size: 1rem; }

/* The bundle card spans the row and lays out sideways */
.card-feature { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); border: 2px solid var(--ink); }
.card-feature .card-body { padding: clamp(24px, 4vw, 48px); justify-content: center; }
.card-feature h3 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.card-feature .card-body > p:not([class]) { font-size: 1.125rem; max-width: 30em; }
.card-feature .card-price { margin-top: 18px; font-size: 2.75rem; }
.card-feature .card-save { font-size: 1.0625rem; font-weight: 600; }

/* ---------- Volume pricing ---------- */
.pricing { padding: var(--space) 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.pricing-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.pricing h2 { max-width: 12em; }
.section-lede { font-size: 1.1875rem; color: var(--ink-2); max-width: 36em; margin-top: 16px; }
.tiers { width: 100%; border-collapse: collapse; background: var(--white); border: 1px solid var(--rule); border-radius: 10px; }
.tiers caption { caption-side: bottom; text-align: left; font-size: 0.9375rem; color: var(--ink-2); padding-top: 12px; }
.tiers td { padding: 14px 18px; border-top: 1px solid var(--rule); }
.tiers tr:first-child td { border-top: 0; }
.tiers td:first-child { font: 600 1.1875rem/1.2 var(--display); }
.tiers td:nth-child(2) { font: 700 1.1875rem/1.2 var(--display); }
.tiers td:nth-child(3) { color: var(--save); text-align: right; }
.tiers td.list { color: var(--ink-2); }
.tiers tr.is-active td { background: #fdeeee; }
.tiers tr.is-active td:first-child { box-shadow: inset 4px 0 0 var(--trace); }

/* ---------- About ---------- */
.about { padding: var(--space) 0; }
.about-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); }
.about p { color: var(--ink-2); font-size: 1.1875rem; max-width: 34em; margin-top: 20px; }
.contact { border-left: 3px solid var(--trace); padding-left: 28px; }
.contact p { font-size: 1.0625rem; }

/* ---------- LubDub page sections ---------- */
.tuned { background: var(--ink); color: var(--on-dark); padding: var(--space) 0; }
.tuned-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); }
.tuned h2 { max-width: 11em; }
.tuned p { color: var(--on-dark-2); font-size: 1.1875rem; max-width: 34em; }
.tuned p:first-child { color: var(--on-dark); }

.connect { padding: var(--space) 0; border-bottom: 1px solid var(--rule); }
.chain { display: flex; align-items: center; margin: 48px 0 56px; }
.chain .node {
  font: 600 1.1875rem/1.1 var(--display);
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 8px;
  padding: 18px 20px;
  text-align: center;
}
.chain .wire { flex: 0 1 90px; min-width: 32px; height: 2px; background: var(--ink); }
.chain .wave { width: 44px; height: 64px; margin: 0 22px; flex: none; }
.chain .wave path { stroke: var(--trace); stroke-width: 2.5; fill: none; stroke-linecap: round; }
.listeners { display: grid; grid-template-columns: auto auto; gap: 10px 14px; align-items: center; }
.chain .node-red { background: var(--trace); border-color: var(--trace); color: #fff; padding: 10px 22px; grid-column: 1; }
.chain .more { grid-column: 2; grid-row: 1 / span 2; font-style: italic; color: var(--ink-2); max-width: 9em; line-height: 1.3; }

.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 4vw, 48px); }
.steps li { counter-increment: step; border-top: 3px solid var(--ink); padding-top: 18px; }
.steps li::before { content: counter(step); display: block; font: 700 3rem/1 var(--display); color: var(--trace); margin-bottom: 12px; }
.steps p { color: var(--ink-2); margin-top: 10px; }

.features { padding: var(--space) 0; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(32px, 6vw, 96px); margin: 40px 0 0; }
.feature-grid div { padding: 24px 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 11em minmax(0, 1fr); gap: 20px; }
.feature-grid dt { font: 600 1.375rem/1.15 var(--display); }
.feature-grid dd { margin: 0; color: var(--ink-2); }

.uses { padding: 0 0 var(--space); }
.uses-grid {
  display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(32px, 6vw, 96px); padding-top: 32px;
  background: linear-gradient(var(--ink), var(--ink)) var(--gutter) 0 / calc(100% - 2 * var(--gutter)) 3px no-repeat;
}
.uses ul { list-style: none; margin: 0; padding: 0; }
.uses li { padding: 0 0 18px; font-size: 1.125rem; max-width: 36em; }
.uses strong { font-family: var(--display); font-weight: 600; font-size: 1.3125rem; }

.faq { padding: var(--space) 0; }
.faq h2 { margin-bottom: 32px; }
.faq details { max-width: 760px; border-top: 1px solid var(--rule); background: var(--paper); }
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; font: 600 1.375rem/1.25 var(--display); padding: 20px 40px 20px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 6px; top: 50%;
  width: 12px; height: 12px;
  border-right: 2px solid var(--trace); border-bottom: 2px solid var(--trace);
  transform: translateY(-75%) rotate(45deg);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: translateY(-25%) rotate(-135deg); }
.faq details p { color: var(--ink-2); max-width: 40em; padding-bottom: 8px; }

/* ---------- Inner pages ---------- */
.page { padding: clamp(36px, 5vw, 64px) 0 var(--space); }
.page-title { margin-bottom: 40px; }
.product-line { margin-bottom: var(--space); }
.line-head { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 28px; }
.line-head img { margin-top: 2px; }
.line-head h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
.line-head p { color: var(--ink-2); margin: 8px 0 0; }
.pricing-inline { padding: clamp(32px, 5vw, 56px); border: 1px solid var(--rule); border-radius: 14px; }

.empty { max-width: 40em; padding: clamp(24px, 6vw, 72px) 0; }
.empty p { color: var(--ink-2); font-size: 1.1875rem; margin-top: 16px; }
.empty .btn { margin-right: 20px; }
.order-text { white-space: pre-wrap; background: var(--white); border: 1px solid var(--rule); border-radius: 10px; padding: 20px; font: 0.9375rem/1.6 var(--text); }

/* Product detail */
.pdp { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.pdp-img { position: sticky; top: 100px; }
.crumbs { font: 500 1rem/1 var(--display); color: var(--ink-2); margin-bottom: 18px; }
.crumbs a { color: inherit; }
.pdp-info h1 { font-size: clamp(2.5rem, 4.6vw, 3.75rem); }
.pdp-info .lede { margin-top: 18px; }
.pdp-price { font: 700 2.75rem/1 var(--display); margin: 24px 0 8px; }
.pdp-price s { color: var(--ink-2); font-weight: 500; font-size: 0.6em; margin-right: 6px; }
.pdp-price small { font: 400 1.0625rem var(--text); color: var(--ink-2); }
.tier-hint { color: var(--save); font-size: 1rem; }
.buy-row { display: flex; gap: 14px; align-items: stretch; flex-wrap: wrap; margin-top: 20px; }

.stepper { display: inline-flex; border: 2px solid var(--ink); border-radius: 6px; overflow: hidden; background: var(--white); }
.stepper button { width: 44px; border: 0; background: transparent; font: 600 1.375rem/1 var(--display); color: var(--ink); cursor: pointer; }
.stepper button:hover { background: #fdeeee; }
.stepper input {
  width: 56px; border: 0; border-left: 1px solid var(--rule); border-right: 1px solid var(--rule);
  text-align: center; font: 600 1.125rem/1 var(--display); color: var(--ink); background: transparent;
  -moz-appearance: textfield; appearance: textfield;
}
.stepper input::-webkit-outer-spin-button, .stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.includes { margin-top: 28px; }
.includes table, .summary table { width: 100%; border-collapse: collapse; margin-top: 14px; }
.includes td, .summary td { padding: 10px 0; border-top: 1px solid var(--rule); vertical-align: top; }
.includes td:last-child, .summary td:last-child { text-align: right; white-space: nowrap; padding-left: 16px; }
.sum td { font-family: var(--display); font-size: 1.1875rem; }
.sum.strong td { font-weight: 700; font-size: 1.5rem; border-top: 2px solid var(--ink); }
.save td { color: var(--save); font-weight: 600; }
.includes .save td { font: 700 1.375rem/1.2 var(--display); }

.pdp-info .tiers { margin-top: 28px; }
.nudge { margin-top: 24px; padding: 18px 20px; border: 1px solid var(--rule); border-left: 4px solid var(--trace); border-radius: 8px; background: var(--white); }
.nudge p { margin: 0 0 10px; }
.nudge p:last-child { margin: 0; }
.nudge-strong { border-color: var(--save); border-left-color: var(--save); background: #eef7f1; }
.nudge-strong .btn { background: var(--save); border-color: var(--save); }
.nudge-strong .btn:hover { background: var(--ink); border-color: var(--ink); }

.pdp-details { margin-top: var(--space); padding-top: var(--space); border-top: 1px solid var(--rule); }
.pdp-details-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); }
.pdp-details h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); margin-bottom: 20px; }
.feature-list { margin: 0; }
.feature-list div { padding: 16px 0; border-top: 1px solid var(--rule); }
.feature-list dt { font: 600 1.25rem/1.2 var(--display); }
.feature-list dd { margin: 4px 0 0; color: var(--ink-2); }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td { text-align: left; vertical-align: top; padding: 12px 0; border-top: 1px solid var(--rule); }
.spec-table th { font: 600 1.0625rem/1.4 var(--display); width: 38%; padding-right: 16px; }
.spec-table td { color: var(--ink-2); }

/* Cart */
#cart h1, #checkout h1 { margin-bottom: 28px; }
.cart-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: clamp(28px, 4vw, 56px); align-items: start; }
.cart-lines { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
.cart-line {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto 110px auto;
  gap: 18px; align-items: center;
  padding: 18px 0; border-bottom: 1px solid var(--rule);
}
.cart-thumb img { border-radius: 8px; background: #000; }
.cart-name a { font: 600 1.3125rem/1.2 var(--display); text-decoration: none; }
.cart-name a:hover { color: var(--trace); }
.cart-name span { display: block; color: var(--ink-2); font-size: 0.9375rem; margin-top: 4px; }
.cart-name s { color: var(--ink-2); }
.cart-total { font: 700 1.3125rem/1 var(--display); text-align: right; }
.remove { background: none; border: 0; color: var(--ink-2); text-decoration: underline; cursor: pointer; font: 0.9375rem var(--text); padding: 4px; }
.remove:hover { color: var(--trace); }

.summary { position: sticky; top: 100px; background: var(--white); border: 1px solid var(--rule); border-radius: 14px; padding: 26px; }
.summary .btn-block { margin: 20px 0 16px; }
.summary .link { font-size: 1rem; }
.saving-note { color: var(--save); font-size: 0.9375rem; margin: 14px 0 0; }

/* Checkout form */
form fieldset { border: 0; padding: 0; margin: 0 0 32px; }
legend { font: 600 1.5rem/1 var(--display); margin-bottom: 14px; padding: 0; }
form label { display: block; font: 600 1.0625rem/1.3 var(--display); margin-bottom: 16px; }
.opt { font: 400 0.875rem var(--text); color: var(--ink-2); }
form input:not([type="radio"]), form textarea {
  display: block; width: 100%; margin-top: 6px;
  font: 400 1.0625rem/1.4 var(--text); color: var(--ink);
  background: var(--white);
  border: 1.5px solid #c9b9ba; border-radius: 6px;
  padding: 11px 12px;
}
form input:focus, form textarea:focus { border-color: var(--ink); outline: 3px solid rgba(196, 38, 56, 0.25); outline-offset: 0; }
form input:user-invalid, form textarea:user-invalid { border-color: var(--trace); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.radios { margin-bottom: 18px; }
.radio { display: flex !important; gap: 10px; align-items: center; font: 400 1.0625rem var(--text) !important; margin-bottom: 10px !important; }
.radio input { width: 18px; height: 18px; accent-color: var(--trace); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--rule); padding: 28px 0; color: var(--ink-2); font-size: 0.9375rem; }
.footer-row { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer-row p { margin: 0; }
.footer-row p:last-child { margin-left: auto; }
.footer-row a { margin-right: 14px; }
.footer-row p:last-child a { margin-right: 0; }
.brand-small { font-size: 1.375rem; color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cart-grid { grid-template-columns: minmax(0, 1fr); }
  .summary { position: static; }
}
@media (max-width: 900px) {
  .header-row { flex-wrap: wrap; gap: 0 16px; padding-top: 12px; }
  .cart-link { margin-left: auto; }
  nav { order: 3; width: 100%; margin: 0; overflow-x: auto; }
  nav ul { gap: 22px; padding: 14px 0 12px; white-space: nowrap; }
  .hero-grid, .tuned-grid, .uses-grid, .pricing-grid, .bundle-grid, .about-grid, .pdp, .pdp-details-grid { grid-template-columns: minmax(0, 1fr); }
  .monitor { max-width: 520px; }
  .pdp-img { position: static; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .card-feature { grid-template-columns: minmax(0, 1fr); }
  .chain { flex-direction: column; align-items: flex-start; }
  .chain .wire { width: 2px; min-width: 0; height: 32px; flex: none; margin-left: 40px; }
  .chain .wave { transform: rotate(90deg); margin: 0 0 0 30px; }
}
@media (max-width: 640px) {
  .cards { grid-template-columns: minmax(0, 1fr); }
  .cart-line { grid-template-columns: 72px minmax(0, 1fr) auto; grid-template-areas: "img name name" "img step total" "img remove remove"; row-gap: 10px; }
  .cart-thumb { grid-area: img; align-self: start; }
  .cart-name { grid-area: name; }
  .cart-line .stepper { grid-area: step; justify-self: start; }
  .cart-total { grid-area: total; }
  .remove { grid-area: remove; justify-self: start; }
  .two { grid-template-columns: minmax(0, 1fr); }
  .bundle-buy .now { font-size: 3.25rem; }
}
@media (max-width: 560px) {
  .feature-grid div { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .trace { height: 100px; }
  .footer-row p:last-child { margin-left: 0; }
  .tiers td { padding: 12px; }
}