:root {
  --ink: #152018;
  --muted: #4a5a4e;
  --paper: #f3f6f2;
  --card: #ffffff;
  --line: #d5ddd6;
  --green: #2f6f45;
  --green-deep: #1c3324;
  --green-soft: #e6efe8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 "Segoe UI", system-ui, sans-serif;
}

a { color: var(--green); }
a:hover { color: var(--green-deep); }

.top {
  background: var(--green-deep);
  color: #e8f3ea;
}

.top-inner, .wrap {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex: 1 1 100%;
  padding: 1.1rem 0 0.35rem;
}

.brand-mark {
  width: 1.45rem;
  height: 1.45rem;
  flex-shrink: 0;
  color: #fff;
}

.brand-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  color: #fff;
  line-height: 1.15;
}

.brand-tagline {
  font-weight: 400;
  font-size: 0.92rem;
  color: #b7cabb;
  letter-spacing: normal;
}

.tabs {
  display: flex;
  flex: 1 1 100%;
  width: 100%;
  gap: 0.25rem;
  padding: 0.4rem 0 0;
}

.tabs a:last-child {
  margin-left: auto;
}

.tabs a {
  color: #c5d4c8;
  text-decoration: none;
  padding: 0.7rem 0.95rem 0.75rem;
  border-bottom: 2px solid transparent;
}

.tabs a:hover { color: #fff; }

.tabs a.active {
  color: #fff;
  border-bottom-color: #7dce8e;
}

.wrap { padding-top: 1.75rem; padding-bottom: 3rem; }

.kicker {
  margin: 0 0 0.35rem;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h2 {
  margin: 0 0 0.65rem;
  font-size: 1.85rem;
  line-height: 1.25;
}

.lead {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.lead-note {
  margin: -0.5rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.guide-nav {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  margin: 0.85rem 0 1.25rem;
}

.guide-nav strong {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--ink);
}

.guide-nav ol {
  margin: 0;
  padding-left: 1.35rem;
  color: var(--muted);
  list-style-position: outside;
}

.guide-nav li {
  margin: 0;
  padding: 0.14rem 0;
  line-height: 1.45;
}

.guide-nav a code {
  font-size: 0.9em;
  padding: 0.05em 0.28em;
}

.guide-nav a {
  display: inline;
  text-decoration: none;
}

.guide-nav a:hover .guide-toc-note {
  color: var(--green);
}

.guide-toc-note {
  color: var(--muted);
  font-size: 0.86em;
  font-weight: 500;
  white-space: nowrap;
}

.guide-toc-note::before {
  content: " · ";
  color: #b0bdb3;
}

@media (min-width: 720px) {
  .guide-nav--split-4 ol,
  .guide-nav--split-8 ol {
    display: grid;
    grid-auto-flow: column;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 2.25rem;
    row-gap: 0.45rem;
    padding-left: 0;
    list-style: none;
    counter-reset: guide-toc;
    align-items: start;
  }

  .guide-nav--split-4 ol {
    grid-template-rows: repeat(4, minmax(1.35rem, auto));
  }

  .guide-nav--split-8 ol {
    grid-template-rows: repeat(8, minmax(1.35rem, auto));
  }

  .guide-nav--split-4 li,
  .guide-nav--split-8 li {
    counter-increment: guide-toc;
    display: grid;
    grid-template-columns: 1.75rem minmax(0, 1fr);
    gap: 0.35rem;
    align-items: start;
    align-self: start;
    min-width: 0;
  }

  .guide-nav--split-4 li::before,
  .guide-nav--split-8 li::before {
    content: counter(guide-toc) ".";
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    text-align: right;
    line-height: 1.35;
    padding-top: 0.05rem;
  }

  .guide-nav--split-4 li a,
  .guide-nav--split-8 li a {
    line-height: 1.35;
  }
}

.guide-up {
  margin: 0.35rem 0 0;
  text-align: right;
}

.guide-up a {
  display: inline-block;
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

.guide-up a:hover {
  color: var(--green-deep);
  background: var(--green-soft);
}

.card h3 a {
  color: inherit;
  text-decoration: none;
}

.card h3 a:hover { color: var(--green); }

.mode-pill-live {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #1a4d6e;
  background: #d9ecf7;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.35rem;
}

.report-offer + .report-offer {
  margin-top: 0.65rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.25rem 0 1.75rem;
}

.btn {
  display: inline-block;
  padding: 0.62rem 1.05rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-primary:hover {
  background: var(--green-deep);
  color: #fff;
}

.btn-ghost {
  background: var(--green-soft);
  color: var(--green-deep);
}

.status-pill {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.32rem 0.65rem;
  border-radius: 4px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.early-access-card p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

.value-prop-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.value-prop-card p {
  margin: 0 0 0.65rem;
  color: var(--muted);
}

.value-prop-card p:last-child {
  margin-bottom: 0;
}

.value-prop-foot {
  margin-top: 0.85rem !important;
  margin-bottom: 0 !important;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

.value-prop-foot--last {
  margin-top: 0.5rem !important;
  padding-top: 0;
  border-top: none;
}

.early-access-card p:last-child {
  margin-bottom: 0;
}

.contact-email-card {
  text-align: center;
}

.contact-label {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-address {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 650;
}

.contact-address a {
  color: var(--green-deep);
  text-decoration: none;
}

.contact-address a:hover {
  text-decoration: underline;
}

.contact-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.note {
  background: var(--green-soft);
  border-left: 3px solid var(--green);
  padding: 0.75rem 0.9rem;
  margin: 1.25rem 0 1.75rem;
  color: var(--ink);
}

.lab-pricing {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 10px;
  padding: 1.15rem 1.25rem;
  margin: 1.25rem 0 1.75rem;
}

.lab-pricing-row {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

@media (min-width: 640px) {
  .lab-pricing-row {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.75rem;
  }

  .lab-pricing-price {
    flex: 0 0 6.5rem;
  }
}

.lab-pricing-amount {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--green-deep);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lab-pricing-period {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.lab-pricing-badge {
  display: inline-block;
  margin-top: 0.55rem;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.lab-pricing-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
}

.lab-pricing-copy p + p {
  margin-top: 0.55rem;
}

.lab-pricing-adds {
  font-size: 0.92rem;
  color: #5f6f63;
}

.grid {
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 720px) {
  .grid.two { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.05rem;
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
}

.card p { margin: 0; color: var(--muted); }

.edition-compare-lead {
  margin: 0 0 0.25rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.edition-compare-foot {
  margin: 0.85rem 0 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.edition-compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.85rem 0 0;
  font-size: 0.95rem;
}

.edition-compare-table th,
.edition-compare-table td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.edition-compare-table thead th {
  background: var(--green-soft);
  color: var(--ink);
  font-weight: 650;
}

.edition-compare-table tbody th {
  font-weight: 500;
  color: var(--ink);
  background: #fafcfa;
}

.edition-compare-table .col-yes,
.edition-compare-table .col-no {
  width: 5.5rem;
  text-align: center;
  vertical-align: middle;
}

.edition-compare-table .col-yes {
  color: var(--green);
  font-weight: 700;
  font-size: 1.05rem;
}

.edition-compare-table .col-no {
  color: #9aa89d;
}

.edition-compare-link {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.lab-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem 0.85rem;
  margin: 0 0 0.7rem;
}

.lab-head .btn {
  background: var(--green);
  color: #fff;
}

.lab-head .btn:hover {
  background: var(--green-deep);
  color: #fff;
}

.lab-head .aside {
  color: var(--muted);
  font-size: 0.92rem;
}

.slot {
  border: 1px dashed #9bb3a2;
  background: repeating-linear-gradient(
    -45deg,
    #f7faf7,
    #f7faf7 8px,
    #eef4ef 8px,
    #eef4ef 16px
  );
  border-radius: 10px;
  padding: 1rem 1.05rem;
  margin: 0.75rem 0;
}

.slot strong { display: block; margin-bottom: 0.25rem; }
.slot p { margin: 0; color: var(--muted); }

.guide-step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.15rem 1.2rem;
  margin: 0.85rem 0 1.25rem;
}

.guide-step > strong {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 1.05rem;
}

.guide-step p { margin: 0 0 0.7rem; color: var(--muted); }
.guide-step ol { margin: 0 0 0.85rem; padding-left: 1.2rem; color: var(--ink); }
.guide-step li { margin: 0.35rem 0; }

.figure {
  margin: 0.85rem 0 1rem;
}

.figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.figure figcaption {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.report-offer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 1.05rem 1.15rem;
  margin: 0.85rem 0 1rem;
}

.mode-pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #8a4b08;
  background: #fde7c7;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.35rem;
}

.report-title {
  font-weight: 650;
  color: var(--ink);
}

.report-sub {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

section { margin: 2rem 0; }

section h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

code {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 0.92em;
  background: var(--green-soft);
  padding: 0.08em 0.35em;
  border-radius: 4px;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  padding: 1.25rem 0 0;
  margin-top: 2.5rem;
}

.legal-page h2 {
  margin: 0 0 0.35rem;
}

.legal-meta {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.legal-section {
  margin-bottom: 0.85rem;
}

.legal-section h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.legal-section p,
.legal-section ul {
  margin: 0 0 0.65rem;
  color: var(--muted);
}

.legal-section p:last-child,
.legal-section ul:last-child {
  margin-bottom: 0;
}

.legal-section ul {
  padding-left: 1.2rem;
}

.legal-footer {
  margin: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Post-checkout thank-you (Lab) */
.thanks-page {
  padding-top: 1.35rem;
}

.thanks-hero {
  position: relative;
  text-align: center;
  margin: 0 0 1.35rem;
  padding: 1.75rem 1.25rem 1.5rem;
  border-radius: 12px;
  border: 1px solid #c8dccf;
  background:
    radial-gradient(circle at 12% 18%, rgba(125, 206, 142, 0.22), transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(47, 111, 69, 0.14), transparent 38%),
    linear-gradient(165deg, #f7fbf8 0%, var(--green-soft) 100%);
  overflow: hidden;
}

.thanks-hero::before,
.thanks-hero::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(47, 111, 69, 0.35);
  animation: thanks-spark 2.8s ease-in-out infinite;
}

.thanks-hero::before {
  top: 1.1rem;
  left: 14%;
  animation-delay: 0.2s;
}

.thanks-hero::after {
  top: 1.4rem;
  right: 16%;
  animation-delay: 1.1s;
}

@keyframes thanks-spark {
  0%, 100% { opacity: 0.25; transform: translateY(0) scale(1); }
  50% { opacity: 0.85; transform: translateY(-4px) scale(1.15); }
}

.thanks-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 0.85rem;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  box-shadow: 0 8px 24px rgba(47, 111, 69, 0.28);
  animation: thanks-pop 0.55s ease-out;
}

@keyframes thanks-pop {
  0% { transform: scale(0.82); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

.thanks-check svg {
  width: 1.65rem;
  height: 1.65rem;
}

.thanks-hero h2 {
  margin-bottom: 0.45rem;
}

.thanks-lead {
  max-width: 34rem;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0;
}

.thanks-card {
  margin-bottom: 0.85rem;
}

.thanks-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.thanks-card p {
  margin: 0 0 0.65rem;
  color: var(--muted);
}

.thanks-card p:last-child {
  margin-bottom: 0;
}

.thanks-steps {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.thanks-steps li {
  margin: 0 0 0.45rem;
}

.thanks-steps li:last-child {
  margin-bottom: 0;
}

.thanks-page .actions {
  justify-content: center;
  margin-top: 1.1rem;
}

.thanks-page .note {
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Research articles */
.research-series-list {
  display: grid;
  gap: 0.85rem;
  margin: 1rem 0 1.5rem;
}

@media (min-width: 720px) {
  .research-series-list { grid-template-columns: 1fr 1fr; }
}

.research-series-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.05rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.research-series-card:hover {
  border-color: #9bb3a2;
  box-shadow: 0 2px 10px rgba(28, 51, 36, 0.06);
}

.research-series-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.research-series-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.research-series-card .series-meta {
  display: block;
  margin-top: 0.55rem;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-meta {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.article-meta span + span::before {
  content: " · ";
  color: #b0bdb3;
}

.article-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--muted);
}

.article-list li { margin: 0.35rem 0; }

.insight-box {
  background: var(--green-soft);
  border-left: 3px solid var(--green);
  border-radius: 0 8px 8px 0;
  padding: 0.85rem 1rem;
  margin: 1rem 0 1.15rem;
}

.insight-box strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--green-deep);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.insight-box p:last-child { margin-bottom: 0; }

.guide-step .insight-box.article-bridge {
  margin-top: 1rem;
  margin-bottom: 0;
}

.guide-step .insight-box.article-bridge p {
  margin: 0;
  color: var(--ink);
  line-height: 1.65;
}

.guide-sub {
  margin-top: 0.9rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.guide-sub:first-of-type {
  margin-top: 0.25rem;
}

.guide-step .guide-q {
  margin: 0 0 0.45rem;
  color: var(--ink);
  font-weight: 650;
}

.article-intro {
  margin: 0 0 1.25rem;
}

.article-intro .lead {
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.65;
}

.article-intro .lead-note {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.flow-block {
  display: block;
  margin: 0.85rem 0 1rem;
  padding: 0.85rem 1rem;
  background: #fafcfa;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre-wrap;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.85rem 0 1rem;
  font-size: 0.92rem;
}

.article-table th,
.article-table td {
  border: 1px solid var(--line);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.article-table thead th {
  background: var(--green-soft);
  font-weight: 650;
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 2rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

.article-nav a { text-decoration: none; }