/* Sibling Systems — shared stylesheet */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F5F3EE;
  --ink: #1C1C1A;
  --muted: #7A776F;
  --rule: #D8D4CC;
  --accent: #2A4038;
  --accent-light: #3D5C51;
  --serif: 'Fraunces', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

/* ── NAV ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 3rem;
  border-bottom: 0.5px solid var(--rule);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--ink);
}

.nav-mark {
  width: 1.5rem;
  height: 1.5rem;
  min-width: 1.5rem;
  max-width: 1.5rem;
  display: block;
  flex: 0 0 auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.8rem;
  font-weight: 400;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 0.02em;
  transition: color 0.15s;
}

.nav-link:hover { color: var(--ink); }

.nav-cta {
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent);
  border: 0.5px solid var(--accent);
  padding: 0.45rem 1.1rem;
  transition: background 0.15s, color 0.15s;
}

.nav-cta:hover { background: var(--accent); color: var(--bg); }

/* ── SECTIONS ── */
section {
  padding: 5rem 3rem;
  border-bottom: 0.5px solid var(--rule);
  max-width: 900px;
  margin: 0 auto;
}

section:last-of-type { border-bottom: none; }

/* ── HERO ── */
.hero {
  padding: 7rem 3rem 6rem;
  max-width: 900px;
  margin: 0 auto;
  border-bottom: 0.5px solid var(--rule);
}

.hero-label {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.hero h1 em { font-style: italic; color: var(--accent); }

.hero-sub {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--muted);
  margin: 1.75rem 0 0.9rem;
  max-width: 520px;
  line-height: 1.65;
}

.hero-ai-line {
  font-size: 0.92rem;
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 2.5rem;
  max-width: 520px;
  line-height: 1.6;
  font-style: italic;
  font-family: var(--serif);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  transition: background 0.15s;
}

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

.hero-post-link {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 300;
}

.hero-post-link a { color: var(--ink); }

/* ── SECTION LABELS ── */
.section-label {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 0.5px;
  background: var(--rule);
  max-width: 80px;
}

/* ── WHAT WE DO ── */
.what h2 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.01em;
  max-width: 620px;
  margin-bottom: 1.5rem;
}

.what p {
  font-size: 0.97rem;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.75;
}

/* ── HOW IT WORKS ── */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.step-num {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 300;
  color: var(--rule);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.step h3 {
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
}

.step p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ── PROOF ── */
.proof-intro {
  font-size: 0.97rem;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 3rem;
  line-height: 1.75;
}

.proof-numbers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.5px;
  background: var(--rule);
  border: 0.5px solid var(--rule);
}

.proof-stat {
  background: var(--bg);
  padding: 2rem 1.5rem;
}

.proof-stat-num {
  font-family: var(--serif);
  font-size: 2.8rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.proof-stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 400;
  line-height: 1.4;
}

.proof-source {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

/* ── SERVICES ── */
.ladder-strip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  padding: 0.75rem 0;
  flex-wrap: wrap;
}

.ladder-strip-label {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.5rem;
}

.ladder-step {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ladder-step-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.04em;
}

.ladder-step-offer {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 300;
}

.ladder-arrow {
  font-size: 0.65rem;
  color: var(--rule);
  margin: 0 0.25rem;
  align-self: center;
}

.services-grid {
  display: grid;
  gap: 0.5px;
  background: var(--rule);
  border: 0.5px solid var(--rule);
  margin-top: 3rem;
}

.service {
  background: var(--bg);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
}

.service-tag {
  grid-column: 1 / -1;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.service h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 0.6rem;
}

.service p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 520px;
}

.service-credit {
  font-size: 0.78rem;
  color: var(--accent-light);
  margin-top: 0.6rem;
  font-weight: 400;
}

.service-price {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 300;
  white-space: nowrap;
  padding-top: 0.25rem;
  text-align: right;
}

/* ── WAITLIST FORM ── */
.waitlist-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.waitlist-form input[type="email"] {
  flex: 1;
  min-width: 200px;
  background: transparent;
  border: 0.5px solid var(--rule);
  padding: 0.55rem 0.9rem;
  font-family: var(--sans);
  font-size: 0.83rem;
  color: var(--ink);
  outline: none;
}

.waitlist-form input[type="email"]::placeholder { color: var(--muted); }
.waitlist-form input[type="email"]:focus { border-color: var(--accent); }

.waitlist-form button {
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 0.55rem 1.1rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s;
}

.waitlist-form button:hover { background: var(--accent-light); }

/* ── TESTIMONIALS ── */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.testimonial {
  border-left: 2px solid var(--accent);
  padding-left: 1.5rem;
}

.testimonial blockquote {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 300;
  font-style: italic;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 1.25rem;
}

.testimonial-attr {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.testimonial-attr strong {
  display: block;
  color: var(--ink);
  font-weight: 500;
  font-size: 0.82rem;
  margin-bottom: 0.15rem;
}

.testimonial-project {
  font-size: 0.73rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 0.3rem;
}

/* Upcoming (not-yet-published) blog post rows */
.post-item--upcoming {
  opacity: 0.45;
  pointer-events: none;
  cursor: default;
}

.post-item--upcoming .post-meta {
  font-style: italic;
}

/* ── ABOUT ── */
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}

.about p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.about-credentials {
  list-style: none;
  border-top: 0.5px solid var(--rule);
  padding-top: 1.5rem;
  margin-top: 0.5rem;
}

.about-credentials li {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.5rem 0;
  border-bottom: 0.5px solid var(--rule);
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0.5rem;
}

.about-credentials li span {
  color: var(--ink);
  font-weight: 400;
}

/* ── CTA / FOOTER ── */
.cta-section {
  padding: 6rem 3rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.cta-section h2 {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.cta-section p {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

footer {
  border-top: 0.5px solid var(--rule);
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 0.75rem;
}

footer p {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

footer a { color: var(--muted); }

/* ── BLOG INDEX ── */
.post-list { margin-top: 0.5rem; }

.post-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 0.5px solid var(--rule);
  text-decoration: none;
  color: inherit;
  align-items: start;
}

.post-item:first-child { padding-top: 0; }
.post-item:last-child { border-bottom: none; }
.post-item:hover .post-title { color: var(--accent); }

.post-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 0.35rem;
  transition: color 0.15s;
  line-height: 1.3;
}

.post-hook {
  font-size: 0.87rem;
  color: var(--muted);
  line-height: 1.6;
}

.post-meta {
  font-size: 0.73rem;
  color: var(--muted);
  text-align: right;
  white-space: nowrap;
  line-height: 1.6;
}

/* ── BLOG POST PAGE ── */
.post-header {
  padding: 5rem 3rem 3rem;
  max-width: 900px;
  margin: 0 auto;
  border-bottom: 0.5px solid var(--rule);
}

.post-series-nav {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.post-series-nav:hover { color: var(--ink); }

.post-header h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.post-header h1 em { font-style: italic; color: var(--accent); }

.post-dateline {
  font-size: 0.75rem;
  color: var(--muted);
  display: flex;
  gap: 1rem;
  align-items: center;
}

.post-dateline span + span::before {
  content: '·';
  margin-right: 1rem;
}

.post-body {
  max-width: 640px;
  margin: 0 auto;
  padding: 3.5rem 3rem 5rem;
}

.post-body p {
  font-size: 0.97rem;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.post-body h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.3;
  margin: 2.5rem 0 1rem;
}

.post-body blockquote {
  border-left: 2px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.5rem;
  margin: 2rem 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
  line-height: 1.65;
}

.post-body a { color: var(--accent); }

.post-body ul {
  margin: 0.5rem 0 1.5rem 1.25rem;
}

.post-body li {
  font-size: 0.97rem;
  line-height: 1.75;
  margin-bottom: 0.4rem;
}

.post-cta-block {
  border-top: 0.5px solid var(--rule);
  padding-top: 2.5rem;
  margin-top: 3rem;
}

.post-cta-block p { color: var(--muted); }

.post-nav {
  display: flex;
  justify-content: space-between;
  padding: 1.75rem 3rem;
  border-top: 0.5px solid var(--rule);
  max-width: 900px;
  margin: 0 auto;
}

.post-nav a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.post-nav a:hover { color: var(--ink); }
.post-nav .prev::before { content: '← '; }
.post-nav .next::after { content: ' →'; }

/* ── CASE STUDY ── */
.case-header {
  padding: 5rem 3rem 3rem;
  max-width: 900px;
  margin: 0 auto;
  border-bottom: 0.5px solid var(--rule);
}

.case-header h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.case-header h1 em { font-style: italic; color: var(--accent); }

.case-body {
  max-width: 640px;
  margin: 0 auto;
  padding: 3.5rem 3rem 5rem;
}

.case-body p {
  font-size: 0.97rem;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.case-body h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin: 2.5rem 0 1rem;
}

.case-body a { color: var(--accent); }

.case-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.5px;
  background: var(--rule);
  border: 0.5px solid var(--rule);
  margin: 2rem 0 2.5rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  nav { padding: 1.25rem 1.5rem; }
  .nav-links { gap: 1.25rem; }
  .hero, section { padding-left: 1.5rem; padding-right: 1.5rem; }
  .about-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .service { grid-template-columns: 1fr; }
  .service-price { text-align: left; }
  footer { padding: 1.5rem; }
  .cta-section { padding: 4rem 1.5rem; }
  .post-item { grid-template-columns: 1fr; }
  .post-meta { text-align: left; }
  .post-body { padding: 2.5rem 1.5rem 4rem; }
  .post-header { padding: 3rem 1.5rem 2rem; }
  .post-nav { padding: 1.5rem; }
  .case-body { padding: 2.5rem 1.5rem 4rem; }
  .case-header { padding: 3rem 1.5rem 2rem; }
}