/* =====================================================================
   MB Wallet Connect — mbwalletconnect.com
   Design system: ink ground, cobalt accent, Fraunces display serif.
   Landing page = dark product surface. Legal pages (body.doc) = paper
   document with the same typographic voice.
   ===================================================================== */

:root {
  --ink: #0a0d12;
  --surface: #10151d;
  --surface-2: #141a24;
  --hairline: rgba(255, 255, 255, 0.08);
  --hairline-strong: rgba(255, 255, 255, 0.14);
  --text: #ece9e2;
  --text-muted: #98a1ad;
  --accent: #5b8cff;
  --accent-hover: #7ea4ff;
  --accent-tint: rgba(91, 140, 255, 0.12);
  --sand: #d9c08f;
  --good: #3fb98d;
  --paper: #f6f3ec;
  --paper-edge: #e8e3d7;
  --ink-on-paper: #171c24;
  --muted-on-paper: #5c6470;
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Albert Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace;
}

* { box-sizing: border-box; }

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 13, 18, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 28px;
  height: 68px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 600; letter-spacing: 0.01em;
  font-size: 16px; white-space: nowrap;
}
.brand:hover { color: var(--text); }
.brand svg { display: block; }
.brand .brand-tail { color: var(--text-muted); font-weight: 500; }

.site-nav { display: flex; gap: 22px; margin-left: 8px; }
.site-nav a { color: var(--text-muted); font-size: 14.5px; font-weight: 500; }
.site-nav a:hover { color: var(--text); }

.header-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body); font-size: 14.5px; font-weight: 600;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  padding: 9px 18px; cursor: pointer; white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-ghost { background: transparent; border-color: var(--hairline-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }
.btn-solid { background: var(--accent); color: #0a0d12; }
.btn-solid:hover { background: var(--accent-hover); color: #0a0d12; }
.btn-lg { padding: 13px 26px; font-size: 15.5px; border-radius: 10px; }

/* ---------------------------------------------------------------- hero */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(720px 420px at 78% 30%, rgba(91, 140, 255, 0.14), transparent 65%);
}
.hero .wrap {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px; align-items: center;
  padding-top: 84px; padding-bottom: 76px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 500; font-size: clamp(38px, 5vw, 58px);
  line-height: 1.08; letter-spacing: -0.015em;
  margin: 0 0 22px; text-wrap: balance;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero .lede {
  font-size: 17.5px; color: var(--text-muted); max-width: 54ch;
  margin: 0 0 30px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-note { font-size: 13px; color: var(--text-muted); margin-top: 18px; }

/* wallet card visual */
.hero-visual { position: relative; }
.wallet-card {
  position: relative;
  background: linear-gradient(160deg, #161d29 0%, #10151d 70%);
  border: 1px solid var(--hairline-strong);
  border-radius: 18px;
  padding: 26px 26px 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  max-width: 430px; margin-left: auto;
}
.wallet-card .card-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 26px;
}
.wallet-card .card-top .card-brand {
  font-size: 12px; letter-spacing: 0.14em; color: var(--text-muted); font-weight: 600;
}
.card-chip {
  width: 38px; height: 28px; border-radius: 6px;
  background: linear-gradient(135deg, var(--sand), #b09660);
  opacity: 0.9;
}
.wallet-card .bal-label { font-size: 12.5px; color: var(--text-muted); margin: 0 0 4px; }
.wallet-card .bal {
  font-family: var(--font-display); font-size: 34px; font-weight: 500;
  margin: 0 0 22px; font-variant-numeric: tabular-nums;
}
.card-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 0; border-top: 1px solid var(--hairline);
  gap: 12px;
}
.card-row .row-name { font-size: 13px; color: var(--text-muted); flex-shrink: 0; }
.card-row .row-val { font-family: var(--font-mono); font-size: 13.5px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-row .tag {
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.08em;
  color: var(--accent); background: var(--accent-tint);
  padding: 3px 8px; border-radius: 99px; flex-shrink: 0;
}
.card-foot {
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--hairline);
  font-size: 12px; color: var(--text-muted);
  display: flex; align-items: center; gap: 8px;
}
.dot-good { width: 7px; height: 7px; border-radius: 50%; background: var(--good); flex-shrink: 0; }

/* ---------------------------------------------------------------- trust strip */
.trust { border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); background: rgba(255,255,255,0.015); }
.trust .wrap {
  display: flex; flex-wrap: wrap; gap: 10px 44px; align-items: center;
  padding: 18px 24px; justify-content: center;
}
.trust span { font-size: 13.5px; color: var(--text-muted); display: inline-flex; align-items: center; gap: 9px; }
.trust b { color: var(--text); font-weight: 600; }
.trust .tick { color: var(--accent); font-weight: 700; }

/* ---------------------------------------------------------------- sections */
section.block { padding: 76px 0; }
.block-head { max-width: 640px; margin-bottom: 44px; }
.eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: 0.16em;
  color: var(--accent); text-transform: uppercase; margin: 0 0 12px;
}
.block-head h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(28px, 3.4vw, 38px); line-height: 1.15;
  margin: 0 0 14px; letter-spacing: -0.01em; text-wrap: balance;
}
.block-head p { color: var(--text-muted); margin: 0; font-size: 16.5px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature {
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 26px 24px;
}
.feature .f-mark { margin-bottom: 18px; color: var(--accent); }
.feature h3 { font-size: 17.5px; font-weight: 600; margin: 0 0 10px; }
.feature p { font-size: 14.5px; color: var(--text-muted); margin: 0; }

/* how it works */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step {
  position: relative; background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 24px 22px 22px;
}
.step .n {
  font-family: var(--font-display); font-size: 15px; font-weight: 600;
  color: var(--accent); display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--accent); margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.step h3 { font-size: 16px; font-weight: 600; margin: 0 0 8px; }
.step p { font-size: 14px; color: var(--text-muted); margin: 0; }

/* security */
.sec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.sec-item {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 22px;
}
.sec-item .s-mark { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.sec-item h3 { font-size: 16px; font-weight: 600; margin: 0 0 6px; }
.sec-item p { font-size: 14px; color: var(--text-muted); margin: 0; }

/* CTA band */
.cta-band {
  border-top: 1px solid var(--hairline);
  background: radial-gradient(640px 280px at 50% 0%, rgba(91, 140, 255, 0.10), transparent 70%);
}
.cta-band .wrap { text-align: center; padding: 80px 24px; }
.cta-band h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 14px; letter-spacing: -0.01em;
}
.cta-band p { color: var(--text-muted); margin: 0 auto 30px; max-width: 52ch; }

/* ---------------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--hairline); padding: 44px 0 40px; }
.foot-grid { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; align-items: flex-start; }
.foot-brand { max-width: 420px; }
.foot-brand .brand { margin-bottom: 14px; }
.foot-legal { font-size: 12.5px; color: var(--text-muted); line-height: 1.7; margin: 0; }
.foot-links { display: flex; gap: 28px; }
.foot-links a { color: var(--text-muted); font-size: 13.5px; }
.foot-links a:hover { color: var(--text); }
.foot-risk {
  margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--hairline);
  font-size: 12px; color: var(--text-muted); line-height: 1.7;
}

/* ---------------------------------------------------------------- modals */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(6, 8, 11, 0.72);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay[hidden] { display: none; }
.modal {
  width: 100%; max-width: 400px;
  background: var(--surface-2); border: 1px solid var(--hairline-strong);
  border-radius: 14px; padding: 30px 28px 26px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.modal h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: 24px; margin: 0 0 6px;
}
.modal .modal-sub { font-size: 14px; color: var(--text-muted); margin: 0 0 22px; }
.modal .close-x {
  float: right; background: none; border: none; color: var(--text-muted);
  font-size: 22px; line-height: 1; cursor: pointer; padding: 2px 6px; margin: -6px -8px 0 0;
}
.modal .close-x:hover { color: var(--text); }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-muted); margin-bottom: 7px; }
.field input {
  width: 100%; background: var(--ink); color: var(--text);
  border: 1px solid var(--hairline-strong); border-radius: var(--radius-sm);
  padding: 11px 13px; font-family: var(--font-body); font-size: 15px;
}
.field input:focus { border-color: var(--accent); outline: none; }
.field-check { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--text-muted); margin: 18px 0; }
.field-check input { margin-top: 3px; accent-color: var(--accent); }
.modal .btn { width: 100%; margin-top: 4px; }
.modal-note {
  margin-top: 16px; padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--accent-tint); border: 1px solid rgba(91, 140, 255, 0.35);
  color: var(--text); font-size: 13.5px; line-height: 1.55;
}
.modal-note[hidden] { display: none; }
.modal-swap { text-align: center; font-size: 13.5px; color: var(--text-muted); margin: 18px 0 0; }
.modal-swap a { cursor: pointer; }

/* =====================================================================
   Legal document pages (body.doc) — paper ground, same voice
   ===================================================================== */
body.doc { background: var(--paper); color: var(--ink-on-paper); }
body.doc .site-header {
  background: rgba(246, 243, 236, 0.88);
  border-bottom: 1px solid var(--paper-edge);
}
body.doc .brand { color: var(--ink-on-paper); }
body.doc .brand .brand-tail { color: var(--muted-on-paper); }
body.doc .site-nav a { color: var(--muted-on-paper); }
body.doc .site-nav a:hover { color: var(--ink-on-paper); }
body.doc .btn-ghost { border-color: rgba(23, 28, 36, 0.22); color: var(--ink-on-paper); }
body.doc .btn-ghost:hover { border-color: var(--accent); }

.doc-sheet { max-width: 780px; margin: 0 auto; padding: 64px 24px 80px; }
.doc-sheet h1 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(32px, 4vw, 44px); line-height: 1.1;
  margin: 0 0 10px; letter-spacing: -0.01em;
}
.doc-meta { font-size: 14px; color: var(--muted-on-paper); margin: 0 0 8px; }
.doc-company {
  font-size: 14px; color: var(--muted-on-paper); line-height: 1.7;
  border-left: 3px solid var(--accent); padding: 10px 16px;
  background: rgba(91, 140, 255, 0.06); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0 40px;
}
.doc-company b { color: var(--ink-on-paper); }
.doc-sheet h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: 24px; margin: 44px 0 14px; letter-spacing: -0.005em;
}
.doc-sheet h3 { font-size: 17px; font-weight: 600; margin: 28px 0 10px; }
.doc-sheet p, .doc-sheet li { font-size: 15.5px; line-height: 1.75; color: #2a313c; }
.doc-sheet ul, .doc-sheet ol { padding-left: 24px; }
.doc-sheet li { margin-bottom: 8px; }
.doc-sheet a { color: #3b6de0; }
.doc-sheet strong { color: var(--ink-on-paper); }
.doc-toc {
  background: #efeadf; border: 1px solid var(--paper-edge); border-radius: var(--radius);
  padding: 20px 24px; margin: 0 0 12px;
}
.doc-toc p { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-on-paper); margin: 0 0 10px; }
.doc-toc ol { margin: 0; padding-left: 20px; columns: 2; column-gap: 36px; }
.doc-toc li { font-size: 14px; margin-bottom: 6px; break-inside: avoid; }
.doc-toc a { color: #3b6de0; }
body.doc .site-footer { border-top: 1px solid var(--paper-edge); }
body.doc .foot-legal, body.doc .foot-risk, body.doc .foot-links a { color: var(--muted-on-paper); }
body.doc .foot-links a:hover { color: var(--ink-on-paper); }
body.doc .foot-risk { border-top: 1px solid var(--paper-edge); }
body.doc .foot-brand .brand { color: var(--ink-on-paper); }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 960px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 44px; padding-top: 56px; padding-bottom: 56px; }
  .wallet-card { margin: 0 auto; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .sec-grid { grid-template-columns: 1fr; }
  .site-nav { display: none; }
}
@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; }
  .header-actions .btn-ghost { display: none; }
  .doc-toc ol { columns: 1; }
}