/* =========================================================
   Renovix — Classic Anthropic-style theme
   No shadows. No gradients. Hairline borders. Lots of air.
   Fonts: Fraunces (display serif) + Inter (body sans)
   ========================================================= */

:root {
  --bg: #F5F1EB;            /* warm off-white, Anthropic-like */
  --bg-alt: #EDE7DD;        /* slightly deeper warm */
  --paper: #FAF7F2;         /* card / surface */
  --ink: #181818;           /* primary text */
  --ink-soft: #3D3A36;
  --ink-muted: #6B655D;
  --line: #DDD5C7;          /* hairline borders */
  --line-strong: #1B1B1B;
  --accent: #C96442;        /* terracotta — classic Anthropic warm */
  --accent-ink: #8E3D1F;
  --ok: #2F6F4F;
  --warn: #8A6A1F;

  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --container: 1200px;
  --container-narrow: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--accent-ink); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.5em;
  line-height: 1.15;
}
h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); font-weight: 350; }
h2 { font-size: clamp(1.875rem, 3.2vw, 2.75rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; font-family: var(--sans); font-weight: 600; letter-spacing: -0.005em; }

p { margin: 0 0 1em; color: var(--ink-soft); }

/* ===== Layout ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 32px;
}

section { padding: 96px 0; border-top: none; background: var(--bg); }
section.flush { border-top: none; }
section.alt { background: var(--bg); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin-bottom: 16px;
}

.section-head {
  margin-bottom: 56px;
  max-width: 760px;
}
.section-head p { font-size: 1.125rem; color: var(--ink-muted); }

/* ===== Header / Nav ===== */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: var(--container);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand .mark {
  width: 22px; height: 22px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  position: relative;
}
.brand .mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links > a,
.nav-links .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.nav-links > a:hover,
.nav-links .nav-link:hover { color: var(--ink); }
.nav-item { position: relative; }
.nav-link .caret {
  font-size: 0.65em;
  opacity: 0.55;
  transition: transform 140ms ease;
}
.has-dropdown:hover .nav-link .caret,
.has-dropdown:focus-within .nav-link .caret { transform: rotate(180deg); }
.dropdown {
  position: absolute;
  top: 100%;
  left: -16px;
  margin-top: 6px;
  min-width: 260px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 140ms ease, transform 140ms ease, visibility 140ms;
  z-index: 60;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border-radius: 4px;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
}
.dropdown a:hover { background: var(--bg-alt); color: var(--ink); }
.dropdown .dd-title { font-weight: 500; }
.dropdown .dd-sub {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}
.nav-cta {
  display: flex;
  gap: 12px;
  align-items: center;
}
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  width: 40px; height: 40px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 18px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
  color: var(--ink);
  transition: background 120ms ease, color 120ms ease;
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: var(--bg); }
.btn-ghost { border-color: var(--line); }
.btn-ghost:hover { background: transparent; color: var(--accent-ink); border-color: var(--ink); }
.btn-lg { padding: 16px 28px; font-size: 1rem; }
.btn-sm { padding: 8px 14px; font-size: 0.85rem; }

/* ===== Hero ===== */
.hero {
  padding: 120px 0 96px;
  border-top: none;
}
.hero h1 { max-width: 14ch; margin-bottom: 28px; }
.hero p.lead {
  font-size: 1.25rem;
  max-width: 56ch;
  color: var(--ink-soft);
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 64px; }
.hero-meta {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.hero-meta .stat .num {
  font-family: var(--serif);
  font-size: 2.25rem;
  display: block;
  line-height: 1;
  margin-bottom: 6px;
}
.hero-meta .stat .lbl {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

/* ===== Grids ===== */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ===== Card (flat, no shadow) ===== */
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px;
}
.card h3 { margin-bottom: 12px; }
.card .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
  margin-bottom: 16px;
  color: var(--ink-muted);
}
.card-bare {
  background: transparent;
  border: none;
  border-top: 1px solid var(--line);
  border-radius: 0;
  padding: 32px 0;
}

/* ===== Feature list with markers ===== */
.feature-list {
  list-style: none;
  padding: 0; margin: 0;
}
.feature-list li {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list .num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  min-width: 32px;
  padding-top: 4px;
}
.feature-list .ttl {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 4px;
  display: block;
}
.feature-list .dsc { color: var(--ink-muted); font-size: 0.95rem; }

/* ===== Code block (flat) ===== */
.code-block {
  background: #1B1B1B;
  color: #E8E2D5;
  font-family: var(--mono);
  font-size: 0.875rem;
  padding: 24px 28px;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.7;
  border: 1px solid #1B1B1B;
}
.code-block .c { color: #8A8378; }
.code-block .k { color: #E0A766; }
.code-block .s { color: #B5C99A; }
.code-block .n { color: #D4B996; }

/* ===== Logos strip ===== */
.logos {
  display: flex;
  flex-wrap: wrap;
  gap: 56px;
  align-items: center;
  justify-content: center;
  padding: 32px 0;
}
.logos .logo {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink-muted);
  letter-spacing: -0.01em;
}

/* ===== Diagram ===== */
.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.flow .step {
  padding: 28px 20px;
  border-right: 1px solid var(--line);
  background: var(--paper);
}
.flow .step:last-child { border-right: none; }
.flow .step .n {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent-ink);
  margin-bottom: 12px;
  display: block;
}
.flow .step h4 { font-family: var(--serif); font-weight: 400; font-size: 1.1rem; margin-bottom: 8px; }
.flow .step p { font-size: 0.9rem; margin: 0; color: var(--ink-muted); }
@media (max-width: 900px) {
  .flow { grid-template-columns: 1fr; }
  .flow .step { border-right: none; border-bottom: 1px solid var(--line); }
  .flow .step:last-child { border-bottom: none; }
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
  overflow-x: auto;
}
.tabs button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 14px 20px;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink-muted);
  cursor: pointer;
  margin-bottom: -1px;
  white-space: nowrap;
}
.tabs button.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.price {
  padding: 40px 32px;
  border-right: 1px solid var(--line);
  background: var(--paper);
}
.price:last-child { border-right: none; }
.price.featured { background: var(--bg-alt); }
.price h3 { font-family: var(--serif); font-weight: 400; }
.price .amt {
  font-family: var(--serif);
  font-size: 2.5rem;
  display: block;
  margin: 16px 0 4px;
}
.price .per { font-size: 0.9rem; color: var(--ink-muted); margin-bottom: 24px; }
.price ul { list-style: none; padding: 0; margin: 24px 0; }
.price ul li {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.price ul li:before { content: "— "; color: var(--ink-muted); }
@media (max-width: 900px) {
  .pricing-grid { grid-template-columns: 1fr; }
  .price { border-right: none; border-bottom: 1px solid var(--line); }
  .price:last-child { border-bottom: none; }
}

/* ===== FAQ ===== */
.faq {
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 24px 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-q .ic {
  font-family: var(--mono);
  font-size: 1.2rem;
  color: var(--ink-muted);
  transition: transform 200ms ease;
}
.faq-item.open .faq-q .ic { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 0 24px;
  color: var(--ink-muted);
  max-width: 72ch;
}
.faq-item.open .faq-a { display: block; }

/* ===== Testimonial ===== */
.quote {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  line-height: 1.35;
  color: var(--ink);
  max-width: 60ch;
  margin: 0 auto 32px;
}
.quote-meta {
  text-align: center;
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.quote-meta strong { color: var(--ink); font-weight: 500; }

/* ===== CTA Band ===== */
.cta-band {
  padding: 96px 0;
  text-align: center;
  border-top: 1px solid var(--line);
  background: var(--bg-alt);
}
.cta-band h2 { max-width: 20ch; margin: 0 auto 20px; }
.cta-band p { max-width: 56ch; margin: 0 auto 32px; color: var(--ink-muted); }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 72px 0 32px;
  background: var(--bg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-grid h5 {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin: 0 0 16px;
  font-weight: 500;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { padding: 6px 0; }
.footer-grid a { text-decoration: none; color: var(--ink-soft); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--ink); }
.footer-grid .about p { font-size: 0.92rem; color: var(--ink-muted); max-width: 36ch; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-muted);
  flex-wrap: wrap;
  gap: 16px;
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== Page header ===== */
.page-header {
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--line);
}
.page-header h1 { max-width: 18ch; }
.page-header p.lead { font-size: 1.2rem; color: var(--ink-muted); max-width: 60ch; }

/* ===== Two-col split ===== */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.split.narrow { gap: 56px; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 48px; }
}

/* ===== Mini stat row ===== */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.stat-row .stat {
  padding: 28px;
  border-right: 1px solid var(--line);
  background: var(--paper);
}
.stat-row .stat:last-child { border-right: none; }
.stat-row .num { font-family: var(--serif); font-size: 2.25rem; display: block; margin-bottom: 4px; }
.stat-row .lbl { color: var(--ink-muted); font-size: 0.9rem; }
@media (max-width: 900px) {
  .stat-row { grid-template-columns: 1fr 1fr; }
  .stat-row .stat:nth-child(2) { border-right: none; }
  .stat-row .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

/* ===== Timeline ===== */
.timeline { border-left: 1px solid var(--line); padding-left: 32px; }
.timeline .tl-item { padding: 18px 0 24px; position: relative; }
.timeline .tl-item:before {
  content: "";
  position: absolute;
  left: -36px; top: 26px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--ink);
}
.timeline .tl-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent-ink);
  margin-bottom: 4px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.timeline h4 { font-family: var(--serif); font-weight: 400; font-size: 1.25rem; margin-bottom: 6px; }
.timeline p { color: var(--ink-muted); margin: 0; }

/* ===== Mobile nav ===== */
@media (max-width: 900px) {
  .nav-links, .nav-cta .btn { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 16px 32px 24px;
    gap: 4px;
  }
  .nav-links.open .nav-item { width: 100%; }
  .nav-links.open .nav-link .caret { display: none; }
  .nav-links.open .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    padding: 0 0 8px 16px;
    margin: 0;
    min-width: 0;
  }
  .nav-links.open .dropdown a { padding: 6px 0; }
  .nav-links.open .dropdown a:hover { background: transparent; }
}

/* ===== Product hero index small ===== */
.product-index {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.product-index a {
  padding: 24px;
  text-decoration: none;
  border-right: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.05rem;
}
.product-index a:last-child { border-right: none; }
.product-index a:hover { background: var(--bg-alt); }
.product-index a small {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
@media (max-width: 900px) {
  .product-index { grid-template-columns: 1fr; }
  .product-index a { border-right: none; border-bottom: 1px solid var(--line); }
  .product-index a:last-child { border-bottom: none; }
}

/* ===== Misc ===== */
hr { border: none; border-top: 1px solid var(--line); margin: 48px 0; }
.text-muted { color: var(--ink-muted); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.small { font-size: 0.875rem; }