/* Wisp design language — "Bitcoin underneath. Real money on the surface."
   Monochrome: black ink on warm paper. Color appears for exactly one thing:
   payment confirmation. Tokens match the design canvas (July 2026). */

:root {
  --ink: #0A0A0A;
  --paper: #FAFAF9;
  --fog: #EFEDE8;
  --board: #E9E7E2;
  --line: #E5E3DE;
  --line-strong: #D8D6D0;
  --mut: #666;
  --dim: #999;
  --confirm: oklch(0.72 0.17 155);
  --confirm-text: oklch(0.55 0.15 155);
  --mono: 'SF Mono', ui-monospace, Menlo, monospace;
}

/* Dark theme — follows the system setting. The monochrome palette inverts:
   paper goes near-black, ink near-white. Confirm green stays fixed. */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #F5F5F4;
    --paper: #0E0E0F;
    --fog: #1C1C1E;
    --board: #2A2A2C;
    --line: #2A2A2C;
    --line-strong: #3A3A3C;
    --mut: #A6A6A6;
    --dim: #6E6E73;
    --confirm-text: oklch(0.78 0.15 155);
  }
  /* The wordmark is a black PNG — invert it to white on the dark background. */
  .wmark-logo { filter: invert(1); }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
  line-height: 1.5;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: #555; }

.label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}

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

/* -- Pills (buttons) -- */
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 32px;
  border-radius: 100px;
  border: none;
  background: var(--fog);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.pill:hover { filter: brightness(0.97); }
.pill.primary { background: var(--ink); color: var(--paper); }
.pill.primary:hover { filter: none; opacity: 0.85; }
.pill.outline { background: transparent; border: 1px solid var(--line-strong); }
.pill.small { height: 40px; padding: 0 20px; font-size: 14px; }
.pill:disabled { opacity: 0.45; cursor: default; }

/* -- The pixel-checker mark -- */
.mark {
  display: grid;
  grid-template-columns: repeat(2, var(--mark-px, 12px));
  grid-template-rows: repeat(2, var(--mark-px, 12px));
}
.mark i { display: block; }
.mark i:first-child, .mark i:last-child { background: var(--mark-ink, var(--ink)); }

/* -- Payment card -- */
.card-visual {
  width: 420px;
  max-width: 100%;
  aspect-ratio: 420 / 264;
  border-radius: 18px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.card-visual.ghost {
  background: #111;
  color: #fff;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}
.card-visual.paper-card {
  background: var(--paper);
  border: 1px solid #E0DED8;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
}
.card-visual .pan {
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.12em;
}

/* -- Forms -- */
.field {
  width: 100%;
  height: 52px;
  padding: 0 20px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}
.field:focus { outline: 2px solid var(--ink); outline-offset: -1px; border-color: var(--ink); }
.field::placeholder { color: var(--dim); }

/* -- Shared bits -- */
.tile { background: var(--fog); border-radius: 24px; padding: 40px; }
.tile.ink { background: var(--ink); color: var(--paper); }
.rule { border: none; border-top: 1px solid var(--fog); margin: 0; }

.testmode {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mut);
  background: var(--fog);
  border-radius: 100px;
  padding: 6px 14px;
}

/* -- Recovery phrase grid (12 numbered words) -- */
.phrase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.phrase-grid .w {
  background: var(--fog);
  border-radius: 12px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 14px;
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.phrase-grid .w i { font-style: normal; font-size: 11px; color: var(--dim); min-width: 16px; }

.lockmark {
  width: 56px; height: 56px; border-radius: 16px; background: var(--ink);
  display: flex; align-items: center; justify-content: center;
}
.lockmark .mark { --mark-px: 10px; --mark-ink: var(--paper); }