/* ============ Solomon Patents — editorial / technical-drawing design ============ */

:root {
  --paper: #f5f1e8;        /* warm paper */
  --paper-deep: #ede8db;   /* darker paper band */
  --ink: #151310;          /* near-black warm ink */
  --ink-soft: #3d3833;     /* body text */
  --ink-faint: #7a7266;    /* secondary */
  --line: #d8d1c2;         /* hairlines */
  --line-strong: #b8ad98;
  --accent: #b3401f;       /* drafting red — used sparingly */
  --fig-ink: #2a2620;
  --fig-grid: #ddd5c4;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 28px; }
.narrow { max-width: 720px; }
.center { text-align: center; }

h1, h2, h3 { color: var(--ink); font-weight: 400; }
h1, h2 { font-family: var(--font-display); letter-spacing: -0.01em; }
h1 { font-size: clamp(3rem, 7.5vw, 5.2rem); line-height: 1.04; margin-bottom: 26px; }
h2 { font-size: clamp(2rem, 4.2vw, 3rem); line-height: 1.1; margin-bottom: 22px; }
h1 em, h2 em { font-style: italic; }
h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

p + p { margin-top: 15px; }
a { color: var(--ink); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}
.eyebrow.light { color: #d9a08b; }

.lede { font-size: 1.15rem; color: var(--ink-faint); max-width: 560px; margin-left: auto; margin-right: auto; }

section { padding: 96px 0; }

/* ============ Buttons ============ */
.btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-ink { background: var(--ink); color: var(--paper); border: 1px solid var(--ink); }
.btn-ink:hover { background: #2e2a24; }
.btn-line { color: var(--ink); border: 1px solid var(--line-strong); background: transparent; }
.btn-line:hover { border-color: var(--ink); }
.btn-sm { padding: 10px 20px; font-size: 0.88rem; }
.btn-lg { padding: 17px 38px; font-size: 1rem; }

/* ============ Nav ============ */
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 241, 232, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
}
.nav-links a:hover { color: var(--ink); }

/* ============ Hero ============ */
.hero { padding: 110px 0 72px; }
.hero .lede { margin-top: 0; }
.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 36px;
  flex-wrap: wrap;
}

/* FIG. 1 */
.fig1 { margin-top: 84px; }
.fig1 svg {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  background: #f8f5ee;
}
.fig-ink rect { fill: none; stroke: var(--fig-ink); stroke-width: 1.4; }
.fig-ink rect.dashed { stroke-width: 0.8; stroke-dasharray: 4 4; }
.fig-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  fill: var(--fig-ink);
}
.fig-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 19px;
  fill: var(--fig-ink);
}
.leader { stroke: var(--fig-ink); stroke-width: 0.8; }
.flow { stroke: var(--fig-ink); stroke-width: 1.2; fill: none; }
.flow.dashed { stroke-dasharray: 5 5; }
.fig-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  fill: var(--ink-faint);
}
.fig1 figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  text-align: center;
}
.fig-cap { color: var(--ink); font-weight: 500; }

/* ============ Fact strip ============ */
.facts { padding: 0 0 96px; }
.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
}
.fact { padding: 34px 32px 8px 0; }
.fact + .fact { border-left: 1px solid var(--line); padding-left: 32px; }
.fact-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin-bottom: 16px;
}
.fact p:not(.fact-index) { font-size: 0.94rem; color: var(--ink-faint); }

/* ============ Problem ============ */
.problem { background: var(--paper-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ============ How ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 48px;
  border-top: 1px solid var(--ink);
}
.step { padding: 34px 32px 0 0; }
.step + .step { border-left: 1px solid var(--line); padding-left: 32px; }
.step p { font-size: 0.94rem; color: var(--ink-faint); }

/* ============ Pricing ============ */
.pricing { background: var(--paper-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.price-sheet { margin-top: 40px; border-top: 1px solid var(--ink); }
.price-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.price-row.head {
  padding: 22px 2px;
  font-weight: 600;
  color: var(--ink);
  font-size: 1.02rem;
}
.price {
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--ink);
  white-space: nowrap;
}
.inc {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  white-space: nowrap;
}
.none {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.price-note { margin-top: 18px; font-size: 0.88rem; color: var(--ink-faint); }

.services { margin-top: 44px; }
.services-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.services-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
}
.services-list li {
  font-size: 0.93rem;
  color: var(--ink-soft);
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

/* ============ Who ============ */
.cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 48px;
  border-top: 1px solid var(--ink);
}
.col { padding: 34px 32px 0 0; }
.col + .col { border-left: 1px solid var(--line); padding-left: 32px; }
.col p { font-size: 0.94rem; color: var(--ink-faint); }

/* ============ Quality (dark band) ============ */
.quality { background: var(--ink); padding: 110px 0; }
.quality h2 { color: var(--paper); }
.quality p:not(.eyebrow) { color: #b5ab9c; }

.bench { margin-top: 44px; border-top: 1px solid rgba(245, 241, 232, 0.45); }
.bench-row {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1.1fr;
  gap: 20px;
  padding: 14px 2px;
  border-bottom: 1px solid rgba(245, 241, 232, 0.14);
  font-size: 0.92rem;
  color: #b5ab9c;
}
.bench-row.head {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 16px 2px 12px;
}
.bench-metric { color: var(--paper); font-weight: 500; }
.bench-us { color: var(--paper); }
.bench-row.head .bench-us { color: #d9a08b; }
.bench-note {
  margin-top: 16px;
  font-size: 0.78rem;
  color: #857b6b !important;
  line-height: 1.6;
}

/* ============ FAQ ============ */
.faq details { border-bottom: 1px solid var(--line); padding: 22px 0; }
.faq details:first-of-type { border-top: 1px solid var(--ink); margin-top: 36px; }
.faq summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--ink);
  font-size: 1.02rem;
  list-style: none;
  position: relative;
  padding-right: 36px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--accent);
}
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 14px; font-size: 0.95rem; color: var(--ink-faint); max-width: 640px; }

/* ============ CTA ============ */
.cta { padding: 130px 0; }
.cta .btn { margin-top: 30px; }
.cta-footnote {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

/* ============ Footer ============ */
.footer { background: var(--ink); padding: 64px 0; }
.footer-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 56px;
  align-items: start;
}
.footer-brand { font-size: 1.3rem; color: var(--paper); }
.footer-contact { margin-top: 10px; }
.footer-contact a { color: #b5ab9c; font-size: 0.9rem; text-decoration: none; }
.footer-contact a:hover { color: var(--paper); }
.disclaimer {
  color: #857b6b;
  font-size: 0.78rem;
  line-height: 1.65;
  max-width: 560px;
  justify-self: end;
}

/* ============ Responsive ============ */
@media (max-width: 880px) {
  section { padding: 68px 0; }
  .hero { padding: 64px 0 48px; }
  .fig1 { margin-top: 56px; }
  .facts-grid, .steps, .cols { grid-template-columns: 1fr; }
  .fact + .fact, .step + .step, .col + .col {
    border-left: none;
    border-top: 1px solid var(--line);
    padding-left: 0;
    margin-top: 26px;
  }
  .fact, .step, .col { padding-right: 0; }
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .disclaimer { justify-self: start; }
  .price-row.head { flex-wrap: wrap; }
  .services-list { grid-template-columns: 1fr; }
  .bench-row { grid-template-columns: 1fr 1fr 1fr; gap: 10px; font-size: 0.8rem; }
}