:root {
  /* color */
  --bg: #fafaf8;
  --bg-elev: #ffffff;
  --fg: #0a0a0a;
  --fg-dim: #6b6b68;
  --line: #e4e4e0;
  --border: #c8c8c2;
  --accent: #00a878;
  --accent-hover: #008f66;
  --mark: #00a878;
  --radius: 2px;
  --font: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  /* spacing scale (4px base) */
  --s1: 0.25rem;   /* 4 */
  --s2: 0.5rem;    /* 8 */
  --s3: 0.75rem;   /* 12 */
  --s4: 1rem;      /* 16 */
  --s5: 1.5rem;    /* 24 */
  --s6: 2rem;      /* 32 */

  /* layout grid */
  --gutter: clamp(1rem, 2.8vw, 1.5rem);
  --section: var(--s4);          /* between major blocks */
  --stack: var(--s3);            /* within a block */
  --card-gap: var(--s3);
  --card-min: 16.5rem;           /* fluid card columns */
  --shell: min(100%, 68rem);
  --header-h: 3.5rem;
  --pad: var(--gutter);          /* alias for existing rules */
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  color: var(--fg);
  background:
    linear-gradient(180deg, #f3f3f0 0%, var(--bg) 18%, var(--bg) 100%);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

:focus-visible {
  outline: 2px solid var(--mark);
  outline-offset: 2px;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--header-h);
  backdrop-filter: blur(10px);
  background: rgba(250, 250, 248, 0.88);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s4);
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: var(--header-h);
}

.brand {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand:hover {
  color: var(--mark);
}

.nav {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--s2) var(--s4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav > li {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  line-height: 1;
}

.nav a,
.nav-dd summary {
  display: inline-flex;
  align-items: center;
  height: 1.5rem;
  font-size: 0.875rem;
  line-height: 1;
  color: var(--fg-dim);
  text-decoration: none;
  cursor: pointer;
}

.nav a:hover,
.nav a[aria-current="page"],
.nav-dd summary:hover,
.nav-dd[open] > summary {
  color: var(--fg);
}

.nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 0.28em;
}

.nav-dd {
  position: relative;
}

.nav-dd details {
  display: flex;
  align-items: center;
}

.nav-dd summary {
  list-style: none;
}

.nav-dd summary::-webkit-details-marker,
.nav-dd summary::marker {
  display: none;
  content: "";
}

.nav-dd__panel {
  position: absolute;
  top: calc(100% + 0.65rem);
  left: 0;
  min-width: 14rem;
  padding: 0.55rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(10, 10, 10, 0.08);
  display: grid;
  gap: 0.15rem;
  z-index: 30;
}

.nav-dd__panel a {
  display: block;
  height: auto;
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius);
  line-height: 1.35;
}

.nav-dd__panel a:hover {
  background: #f3f3f0;
  color: var(--fg);
}

.header-ext {
  font-size: 0.8rem;
  color: var(--fg-dim);
  text-decoration: none;
  white-space: nowrap;
}

.header-ext:hover {
  color: var(--fg);
}

.nav-mobile {
  display: none;
  margin: 0 var(--gutter) var(--s3);
}

.nav-mobile > summary {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
  cursor: pointer;
}

.nav-mobile__list {
  display: grid;
  gap: var(--s2);
  margin: var(--s3) 0 0;
  padding: 0;
  list-style: none;
}

.nav-mobile__list a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--fg-dim);
}

.nav-mobile__list a:hover {
  color: var(--fg);
}

/* —— Main —— */
.page {
  flex: 1;
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: var(--s4) var(--gutter) var(--s5);
  display: flex;
  flex-direction: column;
  gap: var(--section);
}

.hero {
  max-width: 40rem;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--s2);
}

.offer-head {
  max-width: none;
  width: 100%;
  display: grid;
  gap: var(--s2);
}

.offer-head .lead {
  max-width: min(100%, 48rem);
}

.offer-head .actions,
.hero-actions {
  margin-top: var(--s1);
}

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mark);
}

h1 {
  margin: 0;
  font-size: clamp(1.65rem, 1.2rem + 1.8vw, 2.35rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.1rem);
  line-height: 1.5;
  font-weight: 400;
  color: #4a4a46;
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  margin: var(--s4) 0 0;
}

.offer > .hero-actions,
.offer > .actions.hero-actions {
  margin: var(--s4) 0 0;
}

h2 {
  margin: 0 0 var(--s3);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.015em;
}

/* —— Hub search —— */
.hub-search-wrap {
  display: grid;
  gap: var(--s2);
  margin: var(--s4) 0 0;
  max-width: 28rem;
}

.hub-search-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.hub-search {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font: inherit;
  font-size: 1rem;
  color: var(--fg);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.hub-search:focus {
  outline: 2px solid var(--mark);
  outline-offset: 1px;
  border-color: var(--mark);
}

.hub-search-empty {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-dim);
}

.hub-card[hidden] {
  display: none !important;
}

.segment-block[hidden] {
  display: none !important;
}

/* —— Segment blocks on hub —— */
.segments {
  display: grid;
  gap: 0;
  margin: 0;
}

.segment-block {
  display: grid;
  gap: var(--stack);
  padding-top: var(--section);
  border-top: 1px solid var(--line);
}

.segment-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s2) var(--s4);
  margin: 0;
}

.segment-block__num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--mark);
  margin-right: var(--s2);
}

.segment-block__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 500;
}

.segment-block__title a {
  text-decoration: none;
}

.segment-block__title a:hover {
  color: var(--mark);
}

.segment-block__more {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fg-dim);
}

.segment-block__more:hover {
  color: var(--fg);
}

.segment-block__desc {
  margin: 0;
  color: var(--fg-dim);
  max-width: 40rem;
  font-size: 0.95rem;
}

/* —— Cards: fluid auto-fit grid —— */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, var(--card-min)), 1fr));
  gap: var(--card-gap);
  margin: 0;
}

.card {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  padding: var(--s3) var(--s4);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
  min-width: 0;
}

.card:hover {
  border-color: var(--mark);
  border-left-color: var(--mark);
  transform: translateY(-1px);
}

.card-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--mark);
}

.card h2,
.card h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 500;
}

.card p {
  margin: 0;
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--fg-dim);
}

.card-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  margin-top: auto;
  padding: 0.45rem 0.85rem;
  min-height: 2.15rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.card:hover .card-cta {
  border-color: var(--mark);
  color: var(--mark);
  background: rgba(0, 168, 120, 0.06);
}

/* —— How it works —— */
.how {
  max-width: 40rem;
  margin: 0;
  padding-top: var(--section);
  border-top: 1px solid var(--line);
}

.how-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--stack);
}

.how-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: var(--s4);
  align-items: start;
}

.how-num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--mark);
  padding-top: 0.1rem;
}

.how-list strong {
  display: block;
  font-weight: 500;
  margin-bottom: var(--s1);
}

.how-list span {
  font-size: 0.92rem;
  color: var(--fg-dim);
}

/* —— Offer / segment pages —— */
.crumbs {
  margin: 0;
  font-size: 0.8rem;
  color: var(--fg-dim);
}

.offer {
  gap: var(--section);
}

.offer .eyebrow {
  margin-top: 0;
}

.crumbs a {
  color: var(--fg-dim);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--fg);
}

.crumbs span {
  margin: 0 var(--s2);
  opacity: 0.55;
}

.offer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--section) var(--card-gap);
  width: 100%;
}

.offer-section {
  margin: 0;
  max-width: none;
  width: 100%;
  display: grid;
  gap: var(--s3);
}

.offer-section--start {
  max-width: min(100%, 48rem);
}

.offer-section h2 {
  margin: 0;
}

.offer-section p {
  margin: 0;
  color: var(--fg-dim);
}

.bullets {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--fg);
  display: grid;
  gap: var(--s2);
}

.bullets li {
  margin: 0;
}

.audience {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--s2);
}

.audience li {
  padding: var(--s3) var(--s4);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid var(--mark);
  border-radius: var(--radius);
  font-size: 0.92rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  margin: 0;
}

.offer-section .actions {
  margin-top: var(--s2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn.primary {
  background: var(--accent);
  color: #fafaf8;
}

.btn.primary:hover {
  background: var(--accent-hover);
}

.btn.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--fg);
}

.btn.ghost:hover {
  border-color: var(--mark);
  color: var(--mark);
}

.related {
  margin: 0;
  padding-top: var(--section);
  border-top: 1px solid var(--line);
  display: grid;
  gap: var(--stack);
}

.related h2 {
  margin: 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: var(--card-gap);
}

.related-grid a {
  display: block;
  padding: var(--s4);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease;
  min-width: 0;
}

.related-grid a:hover {
  border-color: var(--mark);
}

.related-grid strong {
  display: block;
  font-weight: 500;
  margin-bottom: var(--s1);
}

.related-grid span {
  font-size: 0.85rem;
  color: var(--fg-dim);
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid var(--line);
  background: #f3f3f0;
}

.site-footer__inner {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: var(--s5) var(--gutter);
  font-size: 0.8rem;
  color: var(--fg-dim);
  display: grid;
  gap: var(--s3);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2) var(--s4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-nav a {
  color: var(--fg-dim);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--fg);
}

.footer-meta {
  margin: 0;
}

.footer-meta a {
  color: var(--fg-dim);
}

.footer-note {
  margin: 0;
  opacity: 0.85;
}

/* —— FAQ (spoke) —— */
.faq-list {
  display: grid;
  gap: var(--s2);
  margin: 0;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 0 var(--s4);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 500;
  padding: var(--s3) 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  font-family: var(--mono);
  color: var(--mark);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0 0 var(--s3);
  color: var(--fg-dim);
  font-size: 0.95rem;
}

/* —— 404 —— */
.page-404 {
  padding-top: var(--s5);
}

@media (max-width: 860px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding-block: var(--s3);
  }

  .header-ext,
  .nav-dd {
    display: none;
  }

  .nav-mobile {
    display: block;
  }

  .nav {
    flex-wrap: wrap;
    row-gap: var(--s2);
  }

  .offer-grid {
    grid-template-columns: 1fr;
  }
}