:root {
  --bg: #f4f4f0;
  --surface: #ffffff;
  --card: #f0f0f0;
  --border: rgba(0, 0, 0, 0.08);
  --border-hi: rgba(0, 0, 0, 0.18);
  --text: #000000;
  --muted: #8a8a85;
  --dim: #c8c8c2;
  --green: #23a094;
  --red: #dc341e;
  --pink: #ff90e8;
  --display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --sans: "Inter", ui-sans-serif, system-ui, sans-serif;
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.55;
  height: 100%;
  overflow: hidden;
}

body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100dvh;
}

.header {
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.coin {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--pink);
  border: 1.5px solid var(--text);
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 13px;
  transform: rotate(-16deg);
}
.brand-name {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.brand-sub { font-size: 9px; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

.phases { display: flex; align-items: center; justify-content: center; flex: 1; }
.phase-step {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  opacity: 0.25; transition: opacity 0.35s;
}
.phase-step.lit { opacity: 1; }
.phase-step.fail { opacity: 1; }
.phase-dot {
  width: 8px; height: 8px; border-radius: 50%;
  border: 1.5px solid var(--text); background: transparent;
}
.phase-step.lit .phase-dot { background: var(--pink); border-color: var(--text); }
.phase-step.fail .phase-dot { background: var(--red); border-color: var(--red); }
.phase-label { font-size: 8px; letter-spacing: 0.04em; white-space: nowrap; font-family: var(--display); }
.phase-connector { width: 14px; height: 1px; background: var(--border-hi); margin-bottom: 12px; }

.mode-pill {
  font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  border: 1px solid var(--border-hi); border-radius: 999px; padding: 5px 10px; background: var(--surface);
}

.stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 12px 20px;
  min-height: 0;
  overflow: hidden;
  align-items: stretch;
}

.phone-col {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  overflow: hidden;
  container-type: size;
}

.iphone {
  position: relative;
  height: min(100cqh, 720px, calc(100cqw * 844 / 390));
  width: min(100cqw, calc(min(100cqh, 720px) * 390 / 844));
  background: linear-gradient(180deg, #2a2a2a 0%, #111 18%, #111 100%);
  border-radius: 46px;
  padding: 11px;
  flex-shrink: 0;
  box-shadow:
    0 0 0 1px #000,
    0 0 0 2px #4a4a4a,
    0 22px 48px rgba(0, 0, 0, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}
.hw-btn {
  position: absolute;
  background: #6a6a6a;
  border-radius: 1px;
}
.hw-btn.silent { left: -5px; top: 16%; width: 5px; height: 26px; }
.hw-btn.vol-up { left: -5px; top: 23%; width: 5px; height: 44px; }
.hw-btn.vol-down { left: -5px; top: 32%; width: 5px; height: 44px; }
.hw-btn.power { right: -5px; top: 26%; width: 5px; height: 68px; }

.iphone-screen {
  height: 100%;
  background: #fff;
  border-radius: 36px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
}
.island {
  position: absolute;
  top: 11px;
  left: 50%;
  transform: translateX(-50%);
  width: 108px;
  height: 30px;
  background: #111;
  border-radius: 999px;
  z-index: 4;
}
.island::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #1c2a38;
  box-shadow: inset 0 0 0 1.5px #0a0a0a;
}
.status-bar {
  padding: 14px 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  height: 48px;
}
.status-icons { display: flex; align-items: flex-end; gap: 2px; }
.sig {
  width: 3px; background: #111; border-radius: 1px;
  display: inline-block;
}
.sig:nth-child(1) { height: 4px; }
.sig:nth-child(2) { height: 6px; }
.sig:nth-child(3) { height: 8px; }
.sig:nth-child(4) { height: 10px; }
.wifi {
  width: 11px; height: 8px; margin: 0 4px 0 6px;
  border: 1.6px solid #111; border-bottom: none; border-radius: 10px 10px 0 0;
  transform: rotate(0deg);
}
.batt {
  width: 18px; height: 9px; border: 1.4px solid #111; border-radius: 3px;
  position: relative; margin-left: 2px;
}
.batt::after {
  content: ""; position: absolute; inset: 1.5px 5px 1.5px 1.5px;
  background: #111; border-radius: 1px;
}
.batt::before {
  content: ""; position: absolute; right: -3px; top: 2px;
  width: 2px; height: 4px; background: #111; border-radius: 0 1px 1px 0;
}

.imessage-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  position: relative;
  z-index: 6;
}
.arc-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1.5px solid var(--text); background: var(--pink);
  font-family: var(--display); font-weight: 700; font-size: 14px;
  cursor: pointer; color: var(--text);
}
.imessage-meta { flex: 1; min-width: 0; }
.imessage-name { font-family: var(--display); font-size: 15px; font-weight: 600; letter-spacing: -0.03em; line-height: 1.1; }
.imessage-sub { font-size: 10px; color: var(--muted); margin-top: 2px; }

.wallet-chip {
  display: flex; align-items: center; gap: 5px;
  max-width: 190px;
  border: 1px solid var(--text);
  background: #fff4fb;
  border-radius: 999px;
  padding: 5px 8px 5px 6px;
  cursor: pointer;
  font: inherit;
  color: inherit;
}
.wallet-chip:hover, .pop-wrap.open .wallet-chip { background: var(--pink); }
.wallet-dollar {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--pink); border: 1px solid var(--text);
  display: grid; place-items: center;
  font-family: var(--display); font-weight: 700; font-size: 11px;
  flex-shrink: 0;
}
#buyerWalletChip {
  font-size: 10px; font-weight: 600; letter-spacing: -0.02em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.composer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 6px;
  flex-shrink: 0;
  background: #fff;
}
.composer input {
  flex: 1; min-width: 0;
  border: none; background: #f0f0f0;
  border-radius: 20px;
  font: inherit; font-size: 14px;
  padding: 10px 14px;
  outline: none;
}
.composer input::placeholder { color: var(--muted); }
.composer button {
  width: 32px; height: 32px; border-radius: 50%;
  border: none; background: var(--pink); color: var(--text);
  font-family: var(--display); font-size: 16px; font-weight: 700;
  cursor: pointer; flex-shrink: 0;
  display: grid; place-items: center;
}
.composer button:disabled { opacity: 0.35; cursor: not-allowed; }
.home-ind {
  width: 120px; height: 5px; border-radius: 999px;
  background: #111; margin: 4px auto 8px; flex-shrink: 0;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  position: relative;
}
.panel:has(.pop-wrap.open),
.phone-col:has(.pop-wrap.open) { z-index: 40; }

.panel-head {
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.panel-icon {
  width: 28px; height: 28px; border-radius: 8px;
  border: 1px solid var(--border-hi); background: var(--pink);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--display); font-weight: 700; font-size: 12px;
}
.panel-meta { flex: 1; min-width: 0; }
.panel-name { font-family: var(--display); font-size: 13px; font-weight: 600; letter-spacing: -0.02em; }
.panel-sub { font-size: 10px; color: var(--muted); word-break: break-all; }
.panel-actions { display: flex; gap: 4px; }

.seller-tabs {
  display: flex;
  gap: 6px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.tab-btn {
  font: inherit; font-size: 10px; font-weight: 600;
  border: 1px solid var(--border-hi); background: transparent;
  border-radius: 999px; padding: 5px 10px; cursor: pointer;
}
.tab-btn.active { background: var(--text); color: #fff; border-color: var(--text); }

.pop-wrap { position: relative; }
.profile-btn, .wallet-btn {
  width: 28px; height: 28px; border-radius: 8px;
  border: 1px solid var(--pink); background: #fff4fb; color: var(--text);
  cursor: pointer; font: inherit; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.pop-wrap.open .profile-btn, .pop-wrap.open .wallet-btn,
.profile-btn:hover, .wallet-btn:hover { background: var(--pink); }

.popover {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  width: 280px; background: var(--surface); border: 1px solid var(--text);
  border-radius: 10px; padding: 10px 12px; z-index: 50;
  box-shadow: 6px 6px 0 var(--pink);
}
.iphone-screen:has(#buyerWalletWrap.open) .wallet-sheet,
.iphone-screen:has(#buyerProfileWrap.open) .profile-sheet {
  display: block;
}
.wallet-sheet,
.profile-sheet {
  display: none;
  position: absolute;
  top: 86px;
  left: 10px;
  right: 10px;
  bottom: 118px;
  overflow-y: auto;
  z-index: 30;
  background: var(--surface);
  border: 1px solid var(--text);
  border-radius: 10px;
  padding: 12px;
  box-shadow: 6px 6px 0 var(--pink);
}
.profile-sheet { z-index: 32; }
.pop-wrap.open .popover { display: block; }
.pop-title { font-size: 9px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }

.kv {
  display: flex; justify-content: space-between; gap: 10px;
  padding: 4px 0; border-bottom: 1px solid var(--border); font-size: 10px;
}
.kv:last-child { border-bottom: none; }
.kv span { color: var(--muted); }
.kv strong { font-weight: 600; text-align: right; word-break: break-all; }
.kv a, .scan-link {
  color: var(--text);
  font-weight: 600;
}
.scan-link {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 10px 12px;
  border: 1.5px solid var(--text);
  border-radius: 999px;
  background: var(--pink);
  text-decoration: none;
  font-size: 12px;
}

.feed {
  flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 6px;
  overflow-y: auto; min-height: 0;
}
.empty-hint { margin: auto; max-width: 300px; text-align: center; font-size: 12px; color: var(--muted); }

.bwrap {
  display: flex; flex-direction: column; gap: 2px; width: 100%;
  opacity: 0; transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.bwrap.show { opacity: 1; transform: none; }
.bwrap.sent { align-items: flex-end; }
.bwrap.recv { align-items: flex-start; }
.bwrap.mid { align-items: center; }
.bwrap.sent .blabel { text-align: right; }
.blabel { font-size: 9px; color: #aaa; padding: 0 6px; }

.bubble {
  max-width: 82%; padding: 8px 12px; border-radius: 18px;
  font-size: 13px; line-height: 1.45; white-space: pre-wrap; word-break: break-word;
}
.bubble.out { background: var(--pink); color: var(--text); border-bottom-right-radius: 4px; }
.bubble.inc { background: #e9e9eb; border-bottom-left-radius: 4px; white-space: normal; }
.bubble.sys {
  background: transparent; color: var(--muted);
  font-size: 11px; text-align: center; max-width: 88%;
  padding: 4px 8px; border-radius: 8px;
}

.iphone .feed { padding: 10px 10px 6px; background: #fff; }
.iphone .blabel { font-size: 10px; color: var(--muted); padding: 0 10px; }
.iphone .empty-hint { font-size: 13px; max-width: 220px; }
.iphone .kv-card { border-radius: 16px; background: #f7f7f7; }

.kv-card {
  width: 100%; border: 1px solid var(--border-hi); border-radius: 10px;
  padding: 10px 12px; background: var(--surface);
}
.kv-card-title {
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 8px; padding-bottom: 4px; border-bottom: 1px solid var(--border);
}

.kv-details {
  width: min(100%, 260px);
  border: 1px solid var(--border-hi);
  border-radius: 16px;
  background: #f7f7f7;
  overflow: hidden;
}
.kv-details summary {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  list-style: none; cursor: pointer; padding: 10px 12px;
  font-size: 12px;
}
.kv-details summary::-webkit-details-marker { display: none; }
.kv-details summary span {
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.kv-details summary strong { font-size: 11px; font-weight: 600; }
.kv-details summary::after { content: "▾"; color: var(--muted); font-size: 11px; }
.kv-details[open] summary::after { content: "▴"; }
.kv-details[open] summary { border-bottom: 1px solid var(--border); }
.kv-details-body { padding: 8px 12px 10px; }
.kv-list {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.kv-list-label {
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.kv-list ul {
  margin: 0;
  padding-left: 16px;
}
.kv-list li {
  font-size: 11px;
  font-weight: 500;
  line-height: 1.45;
  margin: 5px 0;
}

.quote-hero {
  width: min(100%, 260px);
  border: 1.5px solid #000;
  background: #f1f333;
  border-radius: 18px;
  padding: 12px 14px;
}
.quote-kicker {
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: #555;
}
.quote-price {
  font-family: var(--display); font-size: 20px; font-weight: 700; line-height: 1.2; margin-top: 6px;
}
.quote-chg { font-size: 12px; font-weight: 600; margin-top: 4px; }
.quote-note { font-size: 11px; margin-top: 8px; color: #333; }

.merchant-status {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0 2px 6px;
}

.product-row {
  display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; align-items: center; gap: 8px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); cursor: pointer; text-align: left; font: inherit; color: inherit;
  opacity: 0; transform: translateX(12px);
  transition: opacity 0.35s ease, transform 0.35s ease, border-color 0.2s;
}
.product-row.show { opacity: 1; transform: none; }
.product-row.glow { border-color: #000; background: #fff7fc; }
.p-ph {
  width: 44px; height: 44px; border-radius: 6px;
  background: var(--pink); border: 1px solid var(--text);
  object-fit: cover; display: block; flex-shrink: 0;
}
.p-vendor { font-size: 9px; color: var(--muted); }
.p-title {
  font-size: 11px; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 240px;
}
.p-price { font-family: var(--display); font-size: 16px; font-weight: 600; margin-top: 2px; }
.p-bid {
  text-align: right; min-width: 72px;
  display: flex; flex-direction: column; align-items: flex-end; gap: 2px;
  font-size: 10px; color: var(--muted);
}
.p-rail { color: var(--text); font-weight: 600; }
.bid-amt { font-size: 11px; font-weight: 600; color: var(--text); }

.category-row {
  display: flex; gap: 6px; padding: 8px 12px; overflow-x: auto;
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.category-row[hidden] { display: none; }
.cat-chip {
  font: inherit; font-size: 10px; font-weight: 600; white-space: nowrap;
  border: 1px solid var(--border-hi); background: transparent;
  border-radius: 999px; padding: 5px 10px; cursor: pointer;
}
.cat-chip.active { background: var(--pink); border-color: var(--text); }

.try-row {
  display: flex; gap: 6px; padding: 0 12px 8px; flex-shrink: 0; overflow-x: auto;
}
.try-row .prompt-chip {
  font-size: 11px; padding: 5px 10px; background: #f4f4f0;
}
.prompt-chip {
  font: inherit; font-size: 12px; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border-hi); background: var(--surface); cursor: pointer;
}
.prompt-chip:hover { background: var(--pink); border-color: var(--text); }

.choice-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.choice-chip {
  font: inherit; font-size: 12px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border-hi); background: #fff; cursor: pointer;
}
.choice-chip:hover { background: var(--pink); border-color: var(--text); }
.choice-chip:disabled { opacity: 0.4; pointer-events: none; }
.choice-chip.is-selected { opacity: 1; background: var(--pink); border-color: var(--text); }

.chat-offers { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; width: 100%; }
.chat-offer {
  display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; gap: 8px; align-items: center;
  text-align: left; font: inherit; color: inherit; cursor: pointer;
  border: 1px solid var(--border-hi); background: #fff; border-radius: 10px; padding: 6px 8px;
  width: 100%;
}
.chat-offer.pick { border-color: var(--text); background: #fff7fc; }
.chat-offer .p-ph { width: 32px; height: 32px; border-radius: 5px; }
.chat-offer .p-title { max-width: none; font-size: 11px; }
.chat-offer .p-vendor { font-size: 8px; }
.chat-offer .p-price { font-size: 12px; margin: 0; white-space: nowrap; }

.pop-section {
  font-size: 9px; color: var(--muted); letter-spacing: 0.08em;
  text-transform: uppercase; margin: 10px 0 4px;
}
.pop-section:first-child { margin-top: 0; }

.section-card {
  width: min(100%, 260px); border: 1px solid var(--border-hi); border-radius: 14px;
  padding: 8px 10px; background: #f7f7f7;
}
.section-card + .section-card { margin-top: 2px; }

.approve-row { display: flex; gap: 8px; margin-top: 8px; }
.approve-btn {
  flex: 1; border: 1px solid var(--text); background: var(--text); color: #fff;
  font: inherit; font-size: 12px; padding: 8px 10px; border-radius: 999px; cursor: pointer;
}
.approve-btn.reject { background: transparent; color: var(--text); }
.approve-btn:disabled { opacity: 0.4; cursor: default; }

.delivery-dialog {
  width: min(280px, calc(100vw - 32px));
  border: 1.5px solid var(--text);
  border-radius: 16px;
  padding: 20px 18px 16px;
  background: var(--surface);
  box-shadow: 6px 6px 0 var(--pink);
  color: var(--text);
}
.delivery-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}
.delivery-q {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.25;
}
.delivery-sub {
  color: var(--muted);
  font-size: 12px;
  margin: 6px 0 14px;
}

.tx-section-title {
  font-size: 9px; color: var(--muted); letter-spacing: 0.08em;
  text-transform: uppercase; margin: 10px 0 4px;
}
.tx-row { padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 10px; }
.tx-row:last-child { border-bottom: none; }
.tx-in { color: var(--green); font-weight: 600; }
.tx-out { color: var(--red); font-weight: 600; }
.tx-meta { display: flex; justify-content: space-between; color: var(--muted); margin-top: 2px; font-size: 9px; }
.tx-empty { font-size: 10px; color: var(--muted); padding: 6px 0; }

html:has(body.arch-body) {
  height: auto;
  overflow: auto;
}
body.arch-body {
  display: block;
  height: auto;
  min-height: 100dvh;
  overflow: visible;
}
.nav {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 28px; border-bottom: 1px solid var(--border); background: var(--bg);
}
.nav .logo { display: flex; align-items: center; gap: 8px; color: inherit; text-decoration: none; font-weight: 600; }
.nav-links { display: flex; gap: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a[href="/architecture"] { color: var(--text); font-weight: 600; }
.nav-right { margin-left: auto; }
.page.arch-page { max-width: min(1400px, calc(100% - 24px)); margin: 0 auto; padding: 16px 12px 48px; }
.eyebrow { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.arch-title { font-family: var(--display); font-size: 28px; line-height: 1.15; margin: 0 0 16px; }
.arch-h2 {
  font-family: var(--display); font-size: 18px; margin: 28px 0 10px;
}
.arch-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
  align-items: start;
  margin: 0 0 8px;
}
.arch-pair .arch-h2 { margin-top: 0; }
.arch-pair .arch-board { margin: 0; }
.arch-board {
  background: #fff;
  border: 1px solid #111;
  border-radius: 20px;
  margin: 8px 0 20px;
  overflow: hidden;
}
.arch-board-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
}
.zoom-btns { display: flex; gap: 6px; }
.zoom-btns button {
  font: inherit; font-size: 12px; font-weight: 700;
  min-width: 32px; height: 28px; padding: 0 8px;
  border: 1px solid #111; border-radius: 8px; background: #fff; cursor: pointer;
}
.zoom-btns button:hover { background: var(--pink); }
.arch-viewport {
  height: calc(100dvh - 160px);
  min-height: 420px;
  overflow: auto;
  position: relative;
  background: #fff;
  cursor: grab;
  overscroll-behavior: contain;
}
.arch-pair .arch-viewport {
  height: auto;
  min-height: 280px;
  max-height: min(520px, calc(100dvh - 280px));
}
.arch-board-compact .arch-viewport {
  height: 280px;
  min-height: 0;
}
@media (max-width: 720px) {
  .arch-pair { grid-template-columns: 1fr; }
}
.arch-viewport.is-panning { cursor: grabbing; }
.arch-sizer { position: relative; }
.arch-zoom {
  transform-origin: 0 0;
  width: max-content;
}
.arch-zoom-split {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 16px;
}
.arch-zoom .mermaid { display: block; }
.arch-zoom svg { max-width: none; height: auto; display: block; }
.arch-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 28px; }
.paper { border: 1px solid var(--border-hi); border-radius: 16px; background: #fff; padding: 16px 18px; }
.paper-head { margin-bottom: 8px; }
.paper p { font-size: 13px; color: #333; }
.paper a { color: var(--text); font-weight: 600; }
.arch-steps { padding-left: 18px; }
.arch-steps li { margin: 6px 0; }
.site-foot {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 14px 28px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px;
}
.lld-table-wrap { overflow-x: auto; }
.lld-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.lld-table th, .lld-table td { text-align: left; vertical-align: top; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--border); }
.lld-table th { font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.lld-table code { font-size: 11px; }
.lld-pre {
  margin: 10px 0 0; padding: 14px; background: #111; color: #e8e8e4;
  font: 11px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
  border-radius: 12px; overflow-x: auto; white-space: pre-wrap;
}

.demo-footer {
  border-top: 1px solid var(--border); background: var(--bg);
  padding: 8px 20px 10px 16px;
  display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 16px;
  position: relative; z-index: 100;
}
.arch-btn {
  font: inherit; font-size: 12px; font-weight: 700;
  text-decoration: none; color: var(--text);
  background: var(--pink); border: 1.5px solid var(--text);
  border-radius: 999px; padding: 8px 14px; white-space: nowrap;
  cursor: pointer;
}
.arch-btn:hover { background: #ffb6f0; }
.footer-actions { display: flex; gap: 8px; align-items: center; }
button.arch-btn { appearance: none; }

.tour-root {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
}
.tour-root:not([hidden]) { display: block; }
.tour-veil {
  position: absolute;
  inset: 0;
  background: transparent;
  pointer-events: none;
}
.tour-spotlight {
  position: absolute;
  border: 2.5px solid #ff90e8;
  border-radius: 14px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45), 6px 6px 0 rgba(255, 144, 232, 0.35);
  background: transparent;
  pointer-events: none;
  transition: top 0.55s ease, left 0.55s ease, width 0.55s ease, height 0.55s ease, opacity 0.35s ease;
  z-index: 1;
}
.tour-tip {
  position: absolute;
  z-index: 2;
  width: min(320px, calc(100vw - 24px));
  background: #fff;
  border: 1.5px solid #000;
  border-radius: 16px;
  padding: 14px 14px 12px;
  box-shadow: 6px 6px 0 var(--pink);
  pointer-events: auto;
  color: var(--text);
}
.tour-step {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.tour-title {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}
.tour-body {
  font-size: 13px;
  line-height: 1.45;
  color: #333;
}
.tour-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.tour-skip {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  padding: 6px 4px;
}
.tour-skip:hover { color: var(--text); }
.tour-tip .approve-btn { flex: 0 0 auto; min-width: 96px; }
.tour-inline-note {
  font-size: 12px;
  line-height: 1.4;
  color: #333;
  background: #fff7fc;
  border: 1px solid var(--border-hi);
  border-radius: 10px;
  padding: 8px 10px;
  margin-bottom: 12px;
}
.tour-pulse {
  animation: tourPulse 1.6s ease-in-out infinite;
}
@keyframes tourPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.035); }
}

.fail-row {
  width: 100%; max-width: none; display: flex; justify-content: space-between; align-items: center;
  font-size: 11px; color: var(--muted);
}
.fail-toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.rail-badge { text-transform: uppercase; letter-spacing: 0.06em; font-size: 10px; font-weight: 600; }
.rail-badge.direct { color: var(--green); }
.rail-badge.protected { color: var(--text); }
.rail-badge.reject { color: var(--red); }

@media (max-width: 860px) {
  .stage { grid-template-columns: 1fr; }
  .phone-col { min-height: min(72dvh, 720px); }
  .header { padding: 10px 12px; flex-wrap: wrap; }
  .demo-footer { padding: 8px 12px 10px; grid-template-columns: 1fr; }
}