/* ============================================
   Terratect Schemas — catalog site
   Matches terratect.ai industrial-monitoring brand
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #f0f0f0;
  --bg-elev: #ffffff;
  --bg-deep: #e8e8e3;
  --ink: #0f0f0f;
  --ink-2: #4a4a4a;
  --ink-3: #888;
  --ink-4: #b4b4b0;
  --rule: rgba(0, 0, 0, 0.09);
  --rule-strong: rgba(0, 0, 0, 0.18);
  --green: #2d6b4f;
  --green-bright: #3d9b6f;
  --green-soft: rgba(45, 107, 79, 0.08);
  --amber: #b07a1e;
  --red: #b04141;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: 'IBM Plex Mono', 'SF Mono', ui-monospace, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

.mono { font-family: var(--mono); }
.uc { text-transform: uppercase; letter-spacing: 0.12em; }
.muted { color: var(--ink-3); }
.ink-2 { color: var(--ink-2); }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  display: flex; align-items: center; gap: 32px;
  height: 60px; padding: 0 40px;
  max-width: 1320px; margin: 0 auto;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: -0.02em; font-size: 17px;
}
.nav-logo svg { width: 22px; height: 22px; }
.nav-logo small {
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  color: var(--ink-3); letter-spacing: 0.12em; text-transform: uppercase;
  padding-left: 8px; border-left: 1px solid var(--rule); margin-left: 4px;
}
.nav-links {
  display: flex; gap: 28px; font-size: 13px; margin-left: 24px; flex: 1;
}
.nav-links a { color: var(--ink-2); transition: color .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-cta {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 8px 14px; border: 1px solid var(--ink); border-radius: 2px;
  font-weight: 500; background: var(--ink); color: var(--bg);
  transition: opacity .15s;
}
.nav-cta:hover { opacity: 0.85; }

/* ===== Shell ===== */
.shell { max-width: 1320px; margin: 0 auto; padding: 0 40px; }
.shell-narrow { max-width: 880px; margin: 0 auto; padding: 0 40px; }

/* ===== Section meta header ===== */
.section-meta {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.14em;
  padding: 14px 0; border-bottom: 1px solid var(--rule);
}
.section-meta .idx { color: var(--green); font-weight: 600; }
.section-meta .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 0 3px var(--green-soft);
}
.section-meta .spacer { flex: 1; height: 1px; background: var(--rule); }

/* ===== Hero ===== */
.hero {
  padding: 100px 0 80px;
  border-bottom: 1px solid var(--rule);
}
.hero h1 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700; letter-spacing: -0.025em; line-height: 1.1;
  max-width: 760px; margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal; color: var(--green);
  font-family: var(--mono); font-weight: 500;
  letter-spacing: -0.01em;
}
.hero-lede {
  font-size: 19px; line-height: 1.55; color: var(--ink-2);
  max-width: 680px; margin-bottom: 40px;
}
.hero-cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 14px 22px; border-radius: 2px;
  font-weight: 500; cursor: pointer; transition: all .15s;
  border: 1px solid var(--ink);
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { opacity: 0.85; }
.btn-secondary { background: transparent; color: var(--ink); }
.btn-secondary:hover { background: var(--ink); color: var(--bg); }
.btn-green {
  background: var(--green); color: #fff; border-color: var(--green);
}
.btn-green:hover { background: var(--green-bright); border-color: var(--green-bright); }
.btn svg { width: 12px; height: 12px; }

/* ===== Role split cards (homepage) ===== */
.role-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  margin: 56px 0 80px;
}
@media (max-width: 800px) { .role-grid { grid-template-columns: 1fr; } }
.role-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  padding: 40px;
  transition: border-color .2s, transform .2s;
  display: flex; flex-direction: column;
}
.role-card:hover { border-color: var(--rule-strong); }
.role-card .role-label {
  font-family: var(--mono); font-size: 10px;
  color: var(--green); letter-spacing: 0.18em;
  text-transform: uppercase; font-weight: 600;
  margin-bottom: 24px;
}
.role-card h3 {
  font-size: 18px; font-weight: 600; letter-spacing: -0.015em;
  line-height: 1.25; margin-bottom: 12px;
}
.role-card p {
  color: var(--ink-2); font-size: 15px; line-height: 1.55;
  margin-bottom: 28px; flex: 1;
}
.role-card .role-list {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 24px;
}
.role-card .role-list span:not(:last-child)::after {
  content: " · "; color: var(--ink-4);
}

/* ===== Catalog filters ===== */
.catalog-filters {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  padding: 28px;
  margin-bottom: 32px;
}
.filter-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
}
@media (max-width: 800px) { .filter-row { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .filter-row { grid-template-columns: 1fr; } }
.filter-group label {
  display: block;
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-3); letter-spacing: 0.14em;
  text-transform: uppercase; font-weight: 600;
  margin-bottom: 8px;
}
.filter-group select,
.filter-group input {
  width: 100%; padding: 10px 12px;
  font-family: var(--sans); font-size: 14px;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--rule-strong); border-radius: 2px;
  cursor: pointer;
}
.filter-group select:focus,
.filter-group input:focus { outline: 2px solid var(--green); outline-offset: -1px; }
.filter-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.12em;
}
.filter-meta button {
  font-family: var(--mono); font-size: 11px;
  color: var(--green); background: none; border: none;
  cursor: pointer; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 600;
}
.filter-meta button:hover { color: var(--green-bright); }

/* ===== Schema cards ===== */
.schema-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
  padding-bottom: 100px;
}
.schema-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  padding: 24px;
  display: flex; flex-direction: column;
  transition: all .15s;
}
.schema-card:hover { border-color: var(--rule-strong); }
.schema-card .schema-meta {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.14em;
  margin-bottom: 16px;
}
.schema-card .schema-meta .type-compound {
  color: var(--green); font-weight: 600;
}
.schema-card .schema-meta .type-atomic {
  color: var(--amber); font-weight: 600;
}
.schema-card h3 {
  font-size: 15px; font-weight: 600; letter-spacing: -0.01em;
  line-height: 1.3; margin-bottom: 6px;
}
.schema-card .schema-id {
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-3); margin-bottom: 16px;
}
.schema-card .schema-desc {
  font-size: 14px; color: var(--ink-2); line-height: 1.55;
  margin-bottom: 20px; flex: 1;
}
.schema-card .schema-tags {
  display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 22px;
}
.tag {
  font-family: var(--mono); font-size: 10px;
  padding: 4px 8px; border-radius: 2px;
  background: var(--bg-deep); color: var(--ink-2);
  text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500;
}
.tag.regulator { background: var(--green-soft); color: var(--green); }
.schema-card .schema-cta {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 20px; border-top: 1px solid var(--rule);
}
.schema-card .schema-cta a {
  font-family: var(--mono); font-size: 11px;
  color: var(--green); text-transform: uppercase; letter-spacing: 0.14em;
  font-weight: 600;
}
.schema-card .schema-cta a:hover { color: var(--green-bright); }
.schema-card .schema-cta a svg {
  width: 12px; height: 12px; margin-left: 4px; vertical-align: middle;
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 32px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
}
.no-results h3 {
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.no-results p {
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.55;
  max-width: 480px;
  margin: 0 auto 24px;
}

/* "Request a custom schema" — inline row inside the filter card */
.filter-request {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.filter-request-text {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
}
.filter-request-text > span:first-child {
  color: var(--ink);
  font-weight: 600;
}
.filter-request-detail {
  color: var(--ink-3);
}
.filter-request-btn {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color .15s;
}
.filter-request-btn:hover {
  color: var(--green-bright);
}
@media (max-width: 700px) {
  .filter-request { flex-direction: column; align-items: stretch; gap: 12px; }
  .filter-request-btn { text-align: center; }
  .filter-request-detail { display: none; }
}

/* ===== Verify product page ===== */
.verify-hero { padding: 100px 0 60px; border-bottom: 1px solid var(--rule); }
.verify-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px;
  padding: 80px 0;
}
@media (max-width: 900px) { .verify-grid { grid-template-columns: 1fr; gap: 40px; } }
.verify-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  padding: 36px;
}
.verify-card h3 {
  font-size: 17px; font-weight: 600; letter-spacing: -0.015em;
  margin-bottom: 12px;
}
.verify-card p {
  color: var(--ink-2); font-size: 15px; line-height: 1.55;
  margin-bottom: 18px;
}
.verify-card ul {
  list-style: none; padding: 0; margin: 20px 0;
}
.verify-card li {
  padding: 10px 0; padding-left: 20px;
  border-top: 1px solid var(--rule);
  font-size: 14px; color: var(--ink-2);
  position: relative;
}
.verify-card li::before {
  content: "—"; position: absolute; left: 0; color: var(--green);
  font-family: var(--mono); font-weight: 500;
}
.verify-card .price-line {
  font-family: var(--mono); font-size: 13px;
  color: var(--ink); font-weight: 600;
  padding: 16px 0; border-top: 1px solid var(--rule-strong);
  margin: 20px 0;
}
.verify-card .price-line strong {
  color: var(--green); font-size: 18px; font-weight: 700;
}

/* ===== Contact ===== */
.contact-section {
  padding: 80px 0 120px;
}
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px;
  margin-top: 48px;
}
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--rule);
  padding: 40px 0; background: var(--bg-deep);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.14em;
}
.footer-inner a:hover { color: var(--ink); }

@media (max-width: 600px) {
  .nav-inner { padding: 0 20px; gap: 16px; }
  .nav-links { display: none; }
  .shell, .shell-narrow { padding: 0 20px; }
  .hero { padding: 60px 0 50px; }
  .role-card { padding: 28px; }
}