/* ==========================================================================
   SATOSure — Design tokens
   Ledger/registry-inspired identity: ink navy + brass seal + deep forest.
   Display: Fraunces (documentary, high-contrast serif)
   Body: Inter | Utility/data: IBM Plex Mono
   ========================================================================== */

:root {
  /* Color */
  --ink: #10233b;
  --ink-soft: #2b3f58;
  --ink-70: rgba(16, 35, 59, 0.7);
  --ink-45: rgba(16, 35, 59, 0.45);
  --paper: #fbfbf8;
  --paper-dim: #eeefe8;
  --paper-line: #dcded4;
  --brass: #a9782f;
  --brass-soft: #c79a4f;
  --brass-tint: #f3e9d6;
  --forest: #1f4d3d;
  --forest-soft: #2c6b54;
  --forest-tint: #e4ede8;
  --white: #ffffff;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout */
  --maxw: 1160px;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.6rem, 5vw, 4.4rem); font-weight: 560; }
h2 { font-size: clamp(1.9rem, 3.2vw, 2.7rem); }
h3 { font-size: clamp(1.2rem, 1.6vw, 1.5rem); }

p { margin: 0; color: var(--ink-70); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--brass);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { transform: translateY(-1px); background: var(--ink-soft); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink-45); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-brass { background: var(--brass); color: var(--white); }
.btn-brass:hover { background: var(--brass-soft); transform: translateY(-1px); }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 251, 248, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--paper-line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 650;
  color: var(--ink);
}
.brand .seal { width: 30px; height: 30px; flex: none; }
.seal { color: var(--brass); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a { color: var(--ink-70); transition: color 0.15s ease; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active { color: var(--ink); text-decoration: underline; text-decoration-color: var(--brass); text-underline-offset: 6px; }

.nav-cta { display: flex; align-items: center; gap: 18px; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--ink);
  color: rgba(251, 251, 248, 0.72);
  padding: 64px 0 32px;
  margin-top: 120px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(251, 251, 248, 0.14);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--paper);
  margin-bottom: 14px;
}
.footer-brand .seal { width: 26px; height: 26px; }
.site-footer p { color: rgba(251, 251, 248, 0.55); font-size: 0.92rem; max-width: 32ch; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(251, 251, 248, 0.5);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: rgba(251, 251, 248, 0.8);
  font-size: 0.94rem;
  margin-bottom: 12px;
}
.footer-col a:hover { color: var(--brass-soft); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 26px;
  font-size: 0.82rem;
  color: rgba(251, 251, 248, 0.4);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---- Sections ---- */
section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}
.section-head h2 { margin-top: 14px; }
.section-head p { margin-top: 16px; font-size: 1.08rem; }

.bg-dim { background: var(--paper-dim); }
.bg-ink { background: var(--ink); color: var(--paper); }
.bg-ink h2, .bg-ink h3 { color: var(--paper); }
.bg-ink p { color: rgba(251, 251, 248, 0.72); }
.bg-ink .eyebrow { color: var(--brass-soft); }
.bg-ink .eyebrow::before { background: var(--brass-soft); }

/* ---- Hero ---- */
.hero { padding: 76px 0 60px; }
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { margin-top: 18px; }
.hero .lede { margin-top: 22px; font-size: 1.16rem; max-width: 46ch; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.hero-note { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-45); }

/* ---- Record card (signature element) ---- */
.record-card {
  background: var(--white);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-l);
  box-shadow: 0 30px 60px -25px rgba(16, 35, 59, 0.28);
  padding: 28px;
  position: relative;
}
.record-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px dashed var(--paper-line);
  padding-bottom: 18px;
  margin-bottom: 18px;
}
.record-file-no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-45);
  letter-spacing: 0.08em;
}
.record-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--forest-tint);
  color: var(--forest);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 5px 11px;
  border-radius: 999px;
}
.record-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--forest-soft); }
.record-client { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.record-avatar {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--ink);
  color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.1rem;
}
.record-client-name { font-weight: 650; font-size: 1.02rem; }
.record-client-sub { font-size: 0.86rem; color: var(--ink-45); margin-top: 2px; }
.record-rows { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.record-row { display: flex; justify-content: space-between; align-items: center; font-size: 0.88rem; }
.record-row span:first-child { color: var(--ink-45); }
.record-row span:last-child { font-family: var(--font-mono); font-weight: 500; }
.record-seal-note {
  display: flex; align-items: center; gap: 10px;
  background: var(--brass-tint);
  border-radius: var(--radius-m);
  padding: 12px 14px;
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.record-seal-note .seal { width: 22px; height: 22px; flex: none; }
.record-card::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid var(--paper-line);
  border-radius: calc(var(--radius-l) - 8px);
  pointer-events: none;
  opacity: 0.5;
}

/* ---- Trust strip ---- */
.trust-strip {
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
  padding: 30px 0;
}
.trust-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.trust-strip p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-45);
}
.trust-marks { display: flex; gap: 30px; flex-wrap: wrap; }
.trust-mark { font-size: 0.86rem; font-weight: 600; color: var(--ink-70); display: flex; align-items: center; gap: 8px; }
.trust-mark svg { width: 16px; height: 16px; color: var(--brass); }

/* ---- Feature grid ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-l);
  overflow: hidden;
}
.feature-card {
  background: var(--paper);
  padding: 34px 30px;
  transition: background 0.15s ease;
}
.feature-card:hover { background: var(--white); }
.feature-icon {
  width: 42px; height: 42px;
  border-radius: 11px;
  background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.feature-icon svg { width: 20px; height: 20px; color: var(--brass-soft); }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: 0.95rem; }

/* ---- Steps (legitimate sequence) ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.step { position: relative; padding-left: 0; }
.step-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brass);
  border: 1px solid var(--brass-soft);
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.step h3 { margin-bottom: 10px; }
.step p { font-size: 0.95rem; }

/* ---- Vertical / use-case cards ---- */
.usecase-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr 1fr;
  gap: 18px;
}
.usecase-card {
  border-radius: var(--radius-l);
  padding: 30px 26px;
  border: 1px solid var(--paper-line);
  background: var(--white);
}
.usecase-card.featured {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.usecase-card.featured h3, .usecase-card.featured p { color: var(--paper); }
.usecase-card.featured p { opacity: 0.78; }
.usecase-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--brass-tint);
  color: var(--brass);
  margin-bottom: 16px;
}
.usecase-card.featured .usecase-tag { background: rgba(169, 120, 47, 0.2); color: var(--brass-soft); }
.usecase-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.usecase-card p { font-size: 0.9rem; }

/* ---- Quote / callout ---- */
.callout {
  border-left: 3px solid var(--brass);
  padding-left: 26px;
}
.callout p { font-size: 1.2rem; color: var(--ink); font-family: var(--font-display); line-height: 1.4; }
.callout cite { display: block; margin-top: 16px; font-style: normal; font-size: 0.86rem; color: var(--ink-45); font-family: var(--font-mono); }

/* ---- CTA band ---- */
.cta-band {
  border-radius: var(--radius-l);
  background: var(--forest);
  color: var(--white);
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.cta-band h2 { color: var(--white); font-size: clamp(1.7rem, 3vw, 2.3rem); }
.cta-band p { color: rgba(255, 255, 255, 0.78); margin-top: 10px; }
.cta-band .btn-primary { background: var(--white); color: var(--forest); }
.cta-band .btn-primary:hover { background: var(--brass-tint); }

/* ---- Form ---- */
.form-panel {
  background: var(--white);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-l);
  padding: 40px;
}
.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-45);
  margin-bottom: 8px;
}
.field input, .field select, .field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-s);
  padding: 12px 14px;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--brass);
  outline-offset: 1px;
  border-color: var(--brass);
}
.field textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 0.82rem; color: var(--ink-45); margin-top: 16px; }
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.form-success .seal { width: 44px; height: 44px; margin: 0 auto 16px; }

/* ---- Page hero (inner pages) ---- */
.page-hero { padding: 60px 0 20px; }
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero p.lede { margin-top: 18px; font-size: 1.08rem; max-width: 56ch; }

/* ---- About page specifics ---- */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.value-list { display: flex; flex-direction: column; gap: 26px; margin-top: 10px; }
.value-item { display: flex; gap: 16px; }
.value-item .mark { width: 26px; height: 26px; flex: none; color: var(--brass); }
.value-item h3 { font-size: 1.05rem; margin-bottom: 6px; }
.value-item p { font-size: 0.94rem; }

.badge-soon {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--paper-dim);
  color: var(--ink-45);
  border: 1px solid var(--paper-line);
  padding: 3px 9px;
  border-radius: 999px;
  margin-left: 10px;
}

/* ---- Responsive ---- */
@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .usecase-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-split { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: block; }
  .nav-cta.open ~ .nav-links,
  .site-header.nav-open .nav-links {
    display: flex;
    position: absolute;
    top: 76px;
    left: 0; right: 0;
    background: var(--paper);
    flex-direction: column;
    padding: 24px 28px;
    border-bottom: 1px solid var(--paper-line);
    gap: 18px;
  }
  section { padding: 64px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .usecase-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 40px 28px; }
  .form-panel { padding: 26px; }
  .trust-strip .container { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}