/* ============================================
   DRONOTIX — Crypto Escrow Platform
   Design system: ink/vault palette, seal & chain-of-custody motifs
   ============================================ */

:root {
  /* Color tokens */
  --ink: #0B1220;
  --ink-2: #0E1626;
  --vault: #0F2E26;
  --vault-2: #133729;
  --seal: #3DDC84;
  --seal-dim: #2BA866;
  --amber: #E8A33D;
  --red: #E8593D;
  --paper: #EDEFE9;
  --paper-dim: #C9CDC2;
  --slate: #8A93A6;
  --slate-dim: #5A6175;
  --line: rgba(237, 239, 233, 0.10);
  --line-strong: rgba(237, 239, 233, 0.18);

  /* Type */
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* Layout */
  --maxw: 1180px;
  --radius: 10px;
  --radius-sm: 6px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.mono {
  font-family: var(--font-mono);
}

/* ============ Background texture ============ */
.grain-bg {
  background-image:
    radial-gradient(circle at 18% 8%, rgba(61, 220, 132, 0.07), transparent 40%),
    radial-gradient(circle at 85% 0%, rgba(232, 163, 61, 0.05), transparent 35%);
  background-attachment: fixed;
}

/* ============ Skip link / focus ============ */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--seal);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 999;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============ Top announcement bar ============ */
.topbar {
  background: var(--vault);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--paper-dim);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-top: 8px;
  padding-bottom: 8px;
  text-align: center;
}
.topbar .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--seal);
  box-shadow: 0 0 0 3px rgba(61, 220, 132, 0.18);
  flex-shrink: 0;
}

/* ============ Header / Nav ============ */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 18, 32, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--paper);
  flex-shrink: 0;
}

.brand .mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.brand .mark svg { width: 100%; height: 100%; display: block; }

nav.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

nav.primary-nav a {
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--slate);
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

nav.primary-nav a:hover {
  color: var(--paper);
  background: rgba(237, 239, 233, 0.05);
}

nav.primary-nav a.active {
  color: var(--seal);
  background: rgba(61, 220, 132, 0.08);
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--paper);
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: translateY(6px) rotate(45deg); background: var(--paper); }
.nav-toggle.open span::after { transform: translateY(-6px) rotate(-45deg); background: var(--paper); }

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--seal);
  color: var(--ink);
}
.btn-primary:hover { background: #4FE596; }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--seal); color: var(--seal); }

.btn-block { width: 100%; }
.btn-lg { padding: 14px 26px; font-size: 15.5px; }

/* ============ Hero ============ */
.hero {
  padding: 88px 0 96px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--seal);
  background: rgba(61, 220, 132, 0.08);
  border: 1px solid rgba(61, 220, 132, 0.25);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  color: var(--paper);
  margin-bottom: 22px;
}

.hero h1 .accent { color: var(--seal); }

.hero .lede {
  font-size: 17.5px;
  color: var(--slate);
  max-width: 50ch;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.hero-meta .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-meta .stat strong {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--paper);
}
.hero-meta .stat span {
  font-size: 12.5px;
  color: var(--slate);
}

/* ============ Seal / contract code visual ============ */
.seal-card {
  background: linear-gradient(165deg, var(--vault-2), var(--vault) 60%, var(--ink-2));
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 28px;
  position: relative;
  box-shadow: 0 30px 60px -28px rgba(0,0,0,0.6);
}

.seal-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(61,220,132,0.4), transparent 40%, transparent 60%, rgba(232,163,61,0.25));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.seal-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.seal-card-head .label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(61, 220, 132, 0.12);
  color: var(--seal);
  border: 1px solid rgba(61, 220, 132, 0.3);
}
.status-pill .dot {
  width: 6px; height: 6px; border-radius: 50%; background: currentColor;
}
.status-pill.amber { background: rgba(232,163,61,0.12); color: var(--amber); border-color: rgba(232,163,61,0.3); }

.code-block {
  background: var(--ink);
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  margin-bottom: 18px;
}
.code-block .code-label {
  font-size: 11px;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.code-block .code-value {
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: 0.12em;
  color: var(--seal);
  font-weight: 600;
}

.seal-rows {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.seal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.seal-row:last-child { border-bottom: none; padding-bottom: 0; }
.seal-row .k { color: var(--slate); }
.seal-row .v { font-family: var(--font-mono); color: var(--paper); }

/* ============ Chain of custody (signature element) ============ */
.custody-chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  margin-top: 56px;
}

.custody-chain::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 9%;
  right: 9%;
  height: 2px;
  background: repeating-linear-gradient(to right, var(--line-strong) 0, var(--line-strong) 8px, transparent 8px, transparent 16px);
  z-index: 0;
}

.custody-step {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 10px;
}

.custody-step .ring {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--ink-2);
  border: 2px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: border-color 0.2s ease;
}

.custody-step.is-key .ring {
  border-color: var(--seal);
  box-shadow: 0 0 0 6px rgba(61,220,132,0.08);
}

.custody-step .ring svg {
  width: 24px;
  height: 24px;
  stroke: var(--paper);
}
.custody-step.is-key .ring svg { stroke: var(--seal); }

.custody-step h4 {
  font-size: 14.5px;
  color: var(--paper);
  margin-bottom: 6px;
}
.custody-step p {
  font-size: 12.5px;
  color: var(--slate);
  max-width: 18ch;
}

/* ============ Section scaffolding ============ */
section {
  padding: 88px 0;
}

.section-tight { padding: 64px 0; }

.section-head {
  max-width: 640px;
  margin-bottom: 52px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--seal);
  margin-bottom: 14px;
  display: block;
}

.section-head h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--paper);
  margin-bottom: 14px;
}

.section-head p {
  color: var(--slate);
  font-size: 16px;
}

.alt-surface {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ============ Cards / grids ============ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--line-strong); }

.card .icon-box {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(61, 220, 132, 0.1);
  border: 1px solid rgba(61, 220, 132, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.card .icon-box svg { width: 22px; height: 22px; stroke: var(--seal); }

.card h3 {
  font-size: 17.5px;
  color: var(--paper);
  margin-bottom: 10px;
}
.card p {
  font-size: 14.5px;
  color: var(--slate);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate-dim);
  margin-bottom: 14px;
  display: block;
}

/* ============ Stats strip ============ */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stats-strip .stat-cell {
  padding: 28px 20px;
  text-align: center;
  border-right: 1px solid var(--line);
}
.stats-strip .stat-cell:last-child { border-right: none; }
.stats-strip .stat-cell strong {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--seal);
  margin-bottom: 4px;
}
.stats-strip .stat-cell span {
  font-size: 12.5px;
  color: var(--slate);
}

/* ============ CTA band ============ */
.cta-band {
  background: linear-gradient(135deg, var(--vault-2), var(--vault));
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  padding: 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band h2 { color: var(--paper); margin-bottom: 14px; font-size: clamp(24px, 3vw, 32px); }
.cta-band p { color: var(--slate); max-width: 50ch; margin: 0 auto 28px; }
.cta-band .hero-actions { justify-content: center; margin-bottom: 0; }

/* ============ Footer ============ */
footer.site-footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  background: var(--ink-2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p {
  color: var(--slate);
  font-size: 14px;
  max-width: 32ch;
  margin-bottom: 20px;
}

.footer-col h5 {
  font-family: var(--font-body);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--slate);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 11px; }
.footer-col a { color: var(--paper-dim); font-size: 14.5px; transition: color 0.15s ease; }
.footer-col a:hover { color: var(--seal); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom p { color: var(--slate-dim); font-size: 13px; }

.crypto-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.crypto-badges span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  border: 1px solid var(--line-strong);
  padding: 5px 10px;
  border-radius: 6px;
}

.disclaimer-strip {
  font-size: 12.5px;
  color: var(--slate-dim);
  line-height: 1.7;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

/* ============ Page header (interior pages) ============ */
.page-header {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}
.page-header h1 {
  font-size: clamp(30px, 4.4vw, 44px);
  color: var(--paper);
  margin-bottom: 14px;
}
.page-header p {
  color: var(--slate);
  font-size: 16.5px;
  max-width: 56ch;
}
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--slate-dim);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--slate); }
.breadcrumb a:hover { color: var(--seal); }

/* ============ Process / steps (detailed, for How It Works) ============ */
.process-list {
  display: flex;
  flex-direction: column;
}
.process-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}
.process-item:last-child { border-bottom: none; }
.process-item .step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--seal);
  border: 1px solid rgba(61,220,132,0.3);
  background: rgba(61,220,132,0.06);
  border-radius: 50%;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.process-item h3 { font-size: 19px; color: var(--paper); margin-bottom: 10px; }
.process-item p { color: var(--slate); font-size: 15px; max-width: 64ch; }
.process-item .role-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--amber);
  background: rgba(232,163,61,0.1);
  border: 1px solid rgba(232,163,61,0.28);
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.process-item .role-tag.buyer { color: var(--seal); background: rgba(61,220,132,0.1); border-color: rgba(61,220,132,0.28); }

/* ============ Pricing / fee table ============ */
.fee-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.fee-table th, .fee-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}
.fee-table th {
  background: var(--ink-2);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}
.fee-table td { color: var(--paper-dim); }
.fee-table td.highlight { color: var(--seal); font-family: var(--font-mono); }
.fee-table tr:last-child td { border-bottom: none; }

/* ============ FAQ Accordion ============ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.faq-question .plus {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  position: relative;
}
.faq-question .plus::before,
.faq-question .plus::after {
  content: "";
  position: absolute;
  background: var(--seal);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.faq-question .plus::before { width: 14px; height: 2px; }
.faq-question .plus::after { width: 2px; height: 14px; transition: transform 0.2s ease; }
.faq-item.open .plus::after { transform: translate(-50%, -50%) rotate(90deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.faq-answer-inner {
  padding: 0 24px 22px;
  color: var(--slate);
  font-size: 14.5px;
  max-width: 70ch;
}
.faq-category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.faq-tab {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--slate);
  background: transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}
.faq-tab.active, .faq-tab:hover {
  color: var(--seal);
  border-color: var(--seal);
  background: rgba(61,220,132,0.08);
}

/* ============ Forms ============ */
.form-card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
}
.form-row { margin-bottom: 20px; }
.form-row label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--paper-dim);
  margin-bottom: 8px;
}
.form-row .hint {
  font-size: 12.5px;
  color: var(--slate-dim);
  margin-top: 6px;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  background: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14.5px;
  transition: border-color 0.15s ease;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--seal);
  outline: none;
}
.form-row textarea { resize: vertical; min-height: 120px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.form-success .check-circle {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(61,220,132,0.12);
  border: 1px solid rgba(61,220,132,0.3);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.form-success .check-circle svg { width: 26px; height: 26px; stroke: var(--seal); }
.form-success h3 { color: var(--paper); margin-bottom: 8px; font-size: 19px; }
.form-success p { color: var(--slate); font-size: 14.5px; }

/* ============ Contact info cards ============ */
.contact-info-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-info-card {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}
.contact-info-card .icon-box { flex-shrink: 0; }
.contact-info-card h4 { color: var(--paper); font-size: 15px; margin-bottom: 6px; }
.contact-info-card p { color: var(--slate); font-size: 13.5px; }
.contact-info-card a { color: var(--seal); }

/* ============ Partner tiers ============ */
.partner-tier {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--ink-2);
  position: relative;
}
.partner-tier.featured {
  border-color: rgba(61,220,132,0.4);
  background: linear-gradient(165deg, var(--vault-2), var(--ink-2));
}
.partner-tier .tier-badge {
  position: absolute;
  top: -12px;
  right: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--seal);
  color: var(--ink);
  padding: 4px 12px;
  border-radius: 999px;
}
.partner-tier h3 { color: var(--paper); font-size: 20px; margin-bottom: 8px; }
.partner-tier .tier-desc { color: var(--slate); font-size: 14px; margin-bottom: 24px; }
.partner-tier ul { list-style: none; margin: 0 0 28px; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.partner-tier li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--paper-dim); }
.partner-tier li svg { width: 16px; height: 16px; stroke: var(--seal); flex-shrink: 0; margin-top: 2px; }

.partner-logos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.partner-logo-cell {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slate-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: center;
}

/* ============ Team cards (about) ============ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.team-card {
  text-align: center;
}
.team-card .avatar {
  width: 84px; height: 84px;
  border-radius: 50%;
  background: var(--vault);
  border: 1px solid var(--line-strong);
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--seal);
}
.team-card h4 { color: var(--paper); font-size: 15.5px; margin-bottom: 4px; }
.team-card span { color: var(--slate); font-size: 13px; }

/* ============ Values / timeline (about) ============ */
.value-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.value-row:last-child { border-bottom: none; }
.value-row h3 { color: var(--paper); font-size: 17px; }
.value-row p { color: var(--slate); font-size: 14.5px; }

/* ============ Service detail page ============ */
.service-hero-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
}

.tag-list { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.tag-list span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--slate);
  border: 1px solid var(--line-strong);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ============ Utility ============ */
.divider {
  height: 1px;
  background: var(--line);
  margin: 64px 0;
}
.center-cta { text-align: center; margin-top: 44px; }
.text-center { text-align: center; }

.warning-box {
  display: flex;
  gap: 14px;
  background: rgba(232, 163, 61, 0.08);
  border: 1px solid rgba(232, 163, 61, 0.28);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.warning-box svg { width: 20px; height: 20px; stroke: var(--amber); flex-shrink: 0; margin-top: 1px; }
.warning-box p { font-size: 13.5px; color: var(--paper-dim); }
.warning-box strong { color: var(--amber); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .service-hero-card { grid-template-columns: 1fr; gap: 32px; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .stats-strip .stat-cell:nth-child(2) { border-right: none; }
  .stats-strip .stat-cell { border-bottom: 1px solid var(--line); }
  .stats-strip .stat-cell:nth-last-child(-n+2) { border-bottom: none; }
  .partner-logos { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  nav.primary-nav { display: none; }
  .nav-toggle { display: flex; }

  nav.primary-nav.mobile-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink-2);
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
    gap: 2px;
  }
  nav.primary-nav.mobile-open a { padding: 12px 10px; font-size: 15.5px; }

  .nav-cta-group .btn-ghost { display: none; }

  .hero { padding: 56px 0 64px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-meta { gap: 22px; }

  .custody-chain { grid-template-columns: 1fr; gap: 28px; }
  .custody-chain::before { display: none; }
  .custody-step { flex-direction: row; text-align: left; gap: 16px; }
  .custody-step .ring { margin-bottom: 0; flex-shrink: 0; }
  .custody-step p { max-width: none; }

  section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }

  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }

  .stats-strip { grid-template-columns: 1fr 1fr; }
  .stats-strip .stat-cell { padding: 22px 14px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .process-item { grid-template-columns: 56px 1fr; gap: 18px; padding: 28px 0; }
  .process-item .step-num { width: 44px; height: 44px; font-size: 12.5px; }

  .form-row-2 { grid-template-columns: 1fr; gap: 0; }

  .value-row { grid-template-columns: 1fr; gap: 10px; }

  .team-grid { grid-template-columns: 1fr 1fr; }

  .service-hero-card { padding: 32px 0; }

  .cta-band { padding: 36px 22px; }

  .fee-table { display: block; overflow-x: auto; white-space: nowrap; }

  .partner-logos { grid-template-columns: 1fr 1fr; }

  .page-header { padding: 40px 0 32px; }
}

@media (max-width: 420px) {
  .hero-meta { gap: 18px; }
  .hero-meta .stat strong { font-size: 19px; }
  .seal-card { padding: 20px; }
  .code-block .code-value { font-size: 19px; letter-spacing: 0.08em; }
  .team-grid { grid-template-columns: 1fr; }
}