/* ============================================================
   Design tokens
   A ledger-and-banknote palette: bottle-green ink, warm parchment,
   and a brass stamp accent. Built for a real-money payment screen,
   not a marketing page, so the palette stays quiet and the only
   recurring flourish is "the dot" - currency micro-print texture
   doubling as a ticket's tear-perforation line.
   ============================================================ */
:root {
  --ink: #142822;             /* deep bottle-green ink - dark surfaces, primary text */
  --ink-soft: #4B6358;        /* muted secondary text on paper */
  --paper: #F3EEDF;           /* warm parchment - light surface */
  --paper-line: #D9CBA0;      /* hairline rule on paper */
  --gold: #B8862E;            /* stamp ink / accent / focus ring */
  --mpesa: #1E8449;           /* M-Pesa action green */
  --ledger-blue: #1F3A5C;     /* card / Visa action */
  --decline: #AE402B;         /* failed / declined status */

  --paper-dark: #1B2E26;      /* dark-mode card surface */
  --paper-dark-line: #2E443A; /* dark-mode hairline */
  --ink-dark-text: #E7E2D2;   /* dark-mode primary text */
  --ink-dark-soft: #9FB3A6;   /* dark-mode secondary text */
}

* { -webkit-font-smoothing: antialiased; box-sizing: border-box; }

body {
  font-family: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--paper);
  background-image: radial-gradient(circle, var(--paper-line) 1px, transparent 1.3px);
  background-size: 22px 22px;
  color: var(--ink);
}
.dark body {
  background-color: #0E1A15;
  background-image: radial-gradient(circle, var(--paper-dark-line) 1px, transparent 1.3px);
  color: var(--ink-dark-text);
}

.font-display { font-family: 'Fraunces', serif; font-optical-sizing: auto; }
.font-mono-ledger { font-family: 'IBM Plex Mono', 'IBM Plex Sans', monospace; }

/* ============================================================
   Signature motif - the dot: security micro-print + tear line
   ============================================================ */
.tear-line {
  height: 9px;
  background-image: radial-gradient(circle, var(--paper-line) 1.6px, transparent 1.8px);
  background-size: 11px 11px;
  background-position: center;
  background-repeat: repeat-x;
}
.dark .tear-line {
  background-image: radial-gradient(circle, var(--paper-dark-line) 1.6px, transparent 1.8px);
}

/* ============================================================
   Ticket card
   ============================================================ */
.ticket {
  background: var(--paper);
  border: 1px solid var(--paper-line);
  animation: ticketIn 0.6s ease;
}
.dark .ticket { background: var(--paper-dark); border-color: var(--paper-dark-line); }
@keyframes ticketIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

.masthead {
  background-color: var(--ink);
  background-image: radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1.3px);
  background-size: 14px 14px;
}

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.eyebrow--muted { color: var(--ink-soft); }
.dark .eyebrow--muted { color: var(--ink-dark-soft); }

/* ============================================================
   Ledger-style form fields
   ============================================================ */
.field-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 0.3rem;
}
.dark .field-label { color: var(--ink-dark-soft); }

.field-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--paper-line);
  padding: 0.45rem 0.05rem;
  font-size: 1rem;
  color: var(--ink);
}
.field-input:focus { outline: none; border-bottom-color: var(--gold); }
.field-input[readonly] { color: var(--ink-soft); }
.dark .field-input { color: var(--ink-dark-text); border-bottom-color: var(--paper-dark-line); }
.dark .field-input[readonly] { color: var(--ink-dark-soft); }

/* ============================================================
   Method tiles
   ============================================================ */
.method-tile {
  border: 1.5px solid var(--paper-line);
  border-radius: 14px;
  padding: 1rem 0.5rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  font-weight: 600;
  text-align: center;
  width: 100%;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.dark .method-tile { border-color: var(--paper-dark-line); }

.method-tile--mpesa { color: var(--mpesa); }
.method-tile--mpesa:hover, .method-tile--mpesa:focus-visible { background: var(--mpesa); color: var(--paper); border-color: var(--mpesa); }

.method-tile--card { color: var(--ledger-blue); }
.method-tile--card:hover, .method-tile--card:focus-visible { background: var(--ledger-blue); color: var(--paper); border-color: var(--ledger-blue); }

.method-tile--compact { padding: 0.6rem 1.25rem; font-size: 0.72rem; }

/* ============================================================
   Ledger rows (receipt.php line items)
   ============================================================ */
.ledger-row { display: flex; align-items: baseline; gap: 0.5rem; font-size: 0.9rem; padding: 0.2rem 0; }
.ledger-label { color: var(--ink-soft); white-space: nowrap; font-size: 0.78rem; }
.dark .ledger-label { color: var(--ink-dark-soft); }
.ledger-leader { flex: 1; border-bottom: 1px dotted var(--paper-line); transform: translateY(-3px); }
.dark .ledger-leader { border-bottom-color: var(--paper-dark-line); }
.ledger-value { white-space: nowrap; font-weight: 600; }

/* ============================================================
   Stamp (receipt status)
   ============================================================ */
.stamp {
  display: inline-block;
  font-family: 'Fraunces', serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.45rem 1.3rem;
  border: 3px solid currentColor;
  border-radius: 9999px;
  transform: rotate(-7deg);
}
.stamp--success { color: var(--mpesa); }
.stamp--pending { color: var(--gold); }
.stamp--failed  { color: var(--decline); }

/* ============================================================
   Overlay / processing step tracker
   ============================================================ */
.step-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--paper-line); display: inline-block; transition: background-color .25s ease, box-shadow .25s ease; }
.dark .step-dot { background: var(--paper-dark-line); }
.step-dot.active { background: var(--gold); box-shadow: 0 0 0 4px rgba(184,134,46,0.22); }
.step-dot.done { background: var(--mpesa); }
.step-line { width: 22px; height: 1px; background: var(--paper-line); display: inline-block; }
.dark .step-line { background: var(--paper-dark-line); }

/* Loader spinner */
.loader {
  border: 3px solid var(--paper-line);
  border-top: 3px solid var(--gold);
  border-radius: 9999px;
  width: 22px; height: 22px;
  animation: spin 1s linear infinite;
  display: inline-block; vertical-align: middle; margin-right: 8px;
}
.dark .loader { border-color: var(--paper-dark-line); border-top-color: var(--gold); }
@keyframes spin { 0% { transform: rotate(0); } 100% { transform: rotate(360deg); } }

/* Progress bar */
#progressBar { transition: width .10s ease; background: var(--gold); }

/* Toast */
#toast { display: none; font-family: 'IBM Plex Sans', sans-serif; }

/* Floating buttons (home / dark toggle) */
.float-btn {
  background: var(--ink);
  color: var(--paper);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  transition: opacity .2s ease;
}
.float-btn:hover { opacity: 0.85; }
.dark .float-btn { background: var(--paper-dark); color: var(--ink-dark-text); border: 1px solid var(--paper-dark-line); }

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .ticket, .loader { animation: none !important; }
}