/* Cryptosystems checkout — tokens from cryptosystems-design (day≡light / dark / matrix). */
:root,
[data-theme="dark"] {
  --cs-bg: #08060c;
  --cs-surface: #16101e;
  --cs-fg: #f8f5fa;
  --cs-muted: #a89ab8;
  --cs-faint: rgba(168, 154, 184, 0.55);
  --cs-glass: rgba(22, 16, 30, 0.72);
  --cs-stroke: rgba(248, 245, 250, 0.10);
  --cs-stroke-strong: rgba(248, 245, 250, 0.20);
  --cs-accent: #f8f5fa;
  --cs-accent-fg: #16101e;
  --cs-ok: #22c5a0;
  --cs-warn: #d4a04a;
  --cs-danger: #d65555;
  --cs-lg-tint: rgba(248, 245, 250, 0.06);
  --cs-lg-rim: rgba(248, 245, 250, 0.18);
  --cs-r-sm: 5px;
  --cs-r-md: 8px;
  --cs-r-lg: 10px;
  --cs-r-xl: 20px;
  --cs-r-full: 1000px;
  --cs-font-display: "Satoshi", "Plus Jakarta Sans", system-ui, sans-serif;
  --cs-font-sans: "Plus Jakarta Sans", Inter, system-ui, sans-serif;
  --cs-mono: "Fragment Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --cs-shadow-card: 0 0 0 1px rgba(248, 245, 250, 0.08), 0 18px 40px -24px rgba(0, 0, 0, 0.75);
  --cs-space-1: 0.25rem;
  --cs-space-2: 0.5rem;
  --cs-space-3: 0.75rem;
  --cs-space-4: 1.25rem;
  --cs-space-5: 2rem;
  --cs-space-6: 2.5rem;
}

[data-theme="day"] {
  --cs-bg: #f5f5f5;
  --cs-surface: #ffffff;
  --cs-fg: #000000;
  --cs-muted: rgba(0, 0, 0, 0.55);
  --cs-faint: rgba(0, 0, 0, 0.40);
  --cs-glass: rgba(255, 255, 255, 0.85);
  --cs-stroke: rgba(0, 0, 0, 0.08);
  --cs-stroke-strong: rgba(0, 0, 0, 0.16);
  --cs-accent: #000000;
  --cs-accent-fg: #ffffff;
  --cs-ok: #2ebd6b;
  --cs-warn: #f39c12;
  --cs-danger: #e74c3c;
  --cs-lg-tint: rgba(0, 0, 0, 0.05);
  --cs-lg-rim: rgba(0, 0, 0, 0.16);
  --cs-r-sm: 5px;
  --cs-r-md: 8px;
  --cs-r-lg: 10px;
  --cs-r-xl: 20px;
  --cs-r-full: 1000px;
  --cs-font-display: "Satoshi", "Plus Jakarta Sans", system-ui, sans-serif;
  --cs-font-sans: "Plus Jakarta Sans", Inter, system-ui, sans-serif;
  --cs-mono: "Fragment Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --cs-shadow-card:
    0 0.706592px 0.706592px -0.541667px rgba(0, 0, 0, 0.10),
    0 1.80656px 1.80656px -1.08333px rgba(0, 0, 0, 0.09),
    0 3.62176px 3.62176px -1.625px rgba(0, 0, 0, 0.09),
    0 6.8656px 6.8656px -2.16667px rgba(0, 0, 0, 0.09),
    0 13.6468px 13.6468px -2.70833px rgba(0, 0, 0, 0.08),
    0 30px 30px -3.25px rgba(0, 0, 0, 0.05),
    inset 0 3px 1px #ffffff;
}

[data-theme="matrix"] {
  --cs-bg: #000000;
  --cs-surface: #000000;
  --cs-fg: #00ff66;
  --cs-muted: #00c850;
  --cs-faint: rgba(0, 200, 80, 0.55);
  --cs-glass: rgba(0, 0, 0, 0.55);
  --cs-stroke: rgba(0, 255, 102, 0.15);
  --cs-stroke-strong: rgba(0, 255, 102, 0.30);
  --cs-accent: #00ff66;
  --cs-accent-fg: #000000;
  --cs-ok: #00ff66;
  --cs-warn: #ffcc00;
  --cs-danger: #ff3344;
  --cs-lg-tint: rgba(0, 255, 102, 0.05);
  --cs-lg-rim: rgba(0, 255, 102, 0.30);
  --cs-r-sm: 2px;
  --cs-r-md: 2px;
  --cs-r-lg: 2px;
  --cs-r-xl: 2px;
  --cs-r-full: 2px;
  --cs-font-display: "Satoshi", "Plus Jakarta Sans", system-ui, sans-serif;
  --cs-font-sans: "Fragment Mono", ui-monospace, Menlo, monospace;
  --cs-mono: "Fragment Mono", ui-monospace, Menlo, monospace;
  --cs-shadow-card: none;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--cs-bg);
  color: var(--cs-fg);
  font-family: var(--cs-font-sans);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

[data-theme="matrix"] body {
  position: relative;
}

[data-theme="matrix"] body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 102, 0.04) 0,
    rgba(0, 255, 102, 0.04) 1px,
    transparent 1px,
    transparent 4px
  );
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: screen;
}

h1, h2, .amount, .screen-title {
  font-family: var(--cs-font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.shell {
  max-width: 40rem;
  margin: 0 auto;
  padding: var(--cs-space-6) var(--cs-space-4) 5rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cs-space-4);
  margin-bottom: var(--cs-space-4);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: var(--cs-space-3);
  min-width: 0;
}

.back-to-desk {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--cs-stroke);
  border-radius: var(--cs-r-full);
  background: var(--cs-lg-tint);
  box-shadow: inset 0 0 0 1px var(--cs-lg-rim);
  color: var(--cs-muted);
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.back-to-desk:hover {
  color: var(--cs-fg);
  border-color: var(--cs-stroke-strong);
}

.back-to-desk:focus-visible {
  outline: 2px solid var(--cs-accent);
  outline-offset: 2px;
}


.brand {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--cs-muted);
  margin: 0;
}

.session-chip {
  flex-shrink: 0;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.theme-switch {
  display: inline-flex;
  gap: 2px;
  border: 1px solid var(--cs-stroke);
  border-radius: var(--cs-r-full);
  padding: 0.15rem;
  background: var(--cs-lg-tint);
  box-shadow: inset 0 0 0 1px var(--cs-lg-rim);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.theme-switch button {
  border: 0;
  background: transparent;
  color: var(--cs-muted);
  font-family: inherit;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: var(--cs-r-full);
  cursor: pointer;
}

.theme-switch button[aria-pressed="true"] {
  background: var(--cs-glass);
  color: var(--cs-fg);
}

.theme-switch button:focus-visible,
.back-to-desk:focus-visible,
.chain:focus-visible,
button.copy:focus-visible,
.faq summary:focus-visible {
  outline: 2px solid var(--cs-accent);
  outline-offset: 2px;
}

.glass {
  background: var(--cs-glass);
  border: 1px solid var(--cs-stroke);
  border-radius: var(--cs-r-xl);
  padding: 1.75rem;
  box-shadow: var(--cs-shadow-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.muted { color: var(--cs-muted); }

.loading-line {
  margin: 0;
  color: var(--cs-faint);
}

.amount-label {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}

.amount {
  font-size: clamp(2rem, 6vw, 2.75rem);
  line-height: 1.15;
  margin: 0.2rem 0 0.65rem;
}

.breakdown {
  margin: 0 0 var(--cs-space-3);
  font-size: 0.9rem;
}

.remaining,
.warn-text {
  margin: 0 0 var(--cs-space-3);
  font-size: 0.9rem;
  color: var(--cs-warn);
}

.section-label {
  margin: var(--cs-space-2) 0;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--cs-muted);
}

.screen-title {
  font-size: 1.35rem;
  margin: 0 0 var(--cs-space-3);
}

.screen-body {
  margin: 0 0 var(--cs-space-4);
}

.bot-cta {
  margin: 0 0 var(--cs-space-4);
  font-size: 0.95rem;
}

.chains {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cs-space-3);
  margin: var(--cs-space-2) 0 var(--cs-space-4);
}

.chain {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cs-space-2);
  border: 1px solid var(--cs-stroke);
  background: var(--cs-lg-tint);
  color: inherit;
  font-family: inherit;
  border-radius: var(--cs-r-lg);
  padding: 0.9rem 1rem;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.chain .chain-label {
  font-weight: 500;
}

.chain .tag {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--cs-muted);
}

.chain.preferred:not([aria-pressed="true"]) {
  border-color: var(--cs-stroke-strong);
}

.chain[aria-pressed="true"] {
  border-color: var(--cs-accent);
  box-shadow: inset 0 0 0 1px var(--cs-accent);
  background: var(--cs-glass);
}

.chain:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.address-block {
  display: grid;
  gap: var(--cs-space-2);
  margin: var(--cs-space-2) 0 var(--cs-space-4);
}

.address-block.pre-alloc {
  margin-top: 0;
}

.addr-label {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.address {
  font-family: var(--cs-mono);
  word-break: break-all;
  font-size: 0.92rem;
  margin: 0;
  padding: var(--cs-space-3);
  border-radius: var(--cs-r-md);
  border: 1px solid var(--cs-stroke);
  background: var(--cs-lg-tint);
}

.placeholder {
  margin: 0;
  padding: var(--cs-space-5) var(--cs-space-4);
  text-align: center;
  color: var(--cs-faint);
  border: 1px dashed var(--cs-stroke-strong);
  border-radius: var(--cs-r-xl);
  font-size: 0.9rem;
  line-height: 1.45;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--cs-space-3);
  margin-top: var(--cs-space-2);
}

.countdown {
  font-variant-numeric: tabular-nums;
  font-family: var(--cs-mono);
  color: var(--cs-muted);
  margin: 0;
  font-size: 0.9rem;
}

.pill {
  display: inline-block;
  border-radius: var(--cs-r-full);
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  border: 1px solid var(--cs-stroke);
  background: var(--cs-lg-tint);
}

.pill.ok { color: var(--cs-ok); border-color: color-mix(in srgb, var(--cs-ok) 40%, transparent); }
.pill.warn { color: var(--cs-warn); border-color: color-mix(in srgb, var(--cs-warn) 40%, transparent); }
.pill.danger { color: var(--cs-danger); border-color: color-mix(in srgb, var(--cs-danger) 40%, transparent); }
.pill.pending { color: var(--cs-accent); border-color: color-mix(in srgb, var(--cs-accent) 40%, transparent); }

.hints {
  margin: var(--cs-space-4) 0 0;
  font-size: 0.9rem;
  line-height: 1.45;
}

.faq {
  margin-top: var(--cs-space-5);
}

.faq h2 {
  font-family: var(--cs-font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-muted);
  font-weight: 500;
}

.faq details {
  border-top: 1px solid var(--cs-stroke);
  padding: 0.85rem 0;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 500;
}

.faq summary::-webkit-details-marker { display: none; }

.faq details p {
  margin: 0.6rem 0 0;
  color: var(--cs-muted);
}

button.copy {
  margin: 0;
  border: 1px solid var(--cs-stroke);
  background: var(--cs-accent);
  color: var(--cs-accent-fg);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--cs-r-lg);
  padding: 0.55rem 1rem;
  cursor: pointer;
  width: fit-content;
}

button.copy:hover,
.chain:hover:not(:disabled) {
  border-color: var(--cs-accent);
}

.qr-wrap {
  margin-top: var(--cs-space-2);
  width: fit-content;
  padding: var(--cs-space-3);
  border-radius: var(--cs-r-lg);
  border: 1px solid var(--cs-stroke);
  background: #fff;
  color: #000;
  box-shadow: var(--cs-shadow-card);
}

.qr-wrap svg { display: block; }

@media (max-width: 480px) {
  .chains { grid-template-columns: 1fr; }
  .shell { padding-inline: 1rem; }
  .topbar { flex-wrap: wrap; }
}

.breakdown-list { margin: var(--cs-space-3) 0 var(--cs-space-4); }
.breakdown-list .breakdown-row,
.breakdown-list > div {
  display: flex; justify-content: space-between; gap: var(--cs-space-3);
  padding: 0.3rem 0; color: var(--cs-muted); font-size: 0.9rem;
}
.breakdown-list .due { color: var(--cs-fg); font-weight: 500; border-top: 1px solid var(--cs-stroke); margin-top: var(--cs-space-2); padding-top: var(--cs-space-2); }
.breakdown-list dt { margin: 0; }
.breakdown-list dd { margin: 0; font-variant-numeric: tabular-nums; font-family: var(--cs-mono); color: var(--cs-fg); }

.address-block.pre-alloc { padding: 0; border: 0; background: transparent; }
.lazy-slot {
  padding: var(--cs-space-5) var(--cs-space-4);
  text-align: center;
  border: 1px dashed var(--cs-stroke-strong);
  border-radius: var(--cs-r-xl);
  background: var(--cs-lg-tint);
}
.lazy-title { margin: 0 0 var(--cs-space-2); font-weight: 500; }
.outcome { text-align: left; }
.outcome .screen-title { margin: var(--cs-space-3) 0 var(--cs-space-2); }
.outcome.success .pill { color: var(--cs-ok); }
.outcome.expired .pill { color: var(--cs-danger); }
.cta-bot {
  margin-top: var(--cs-space-4);
  padding: var(--cs-space-3) var(--cs-space-4);
  border-radius: var(--cs-r-lg);
  border: 1px solid var(--cs-stroke-strong);
  background: var(--cs-lg-tint);
  font-weight: 500;
}
.fine { font-size: 0.85rem; margin-top: var(--cs-space-3); }
.section-label {
  margin: var(--cs-space-4) 0 var(--cs-space-2);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cs-muted);
  font-weight: 500;
}