/* RUB shared styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink:       #1C1B18;
  --paper:     #F5F3EE;
  --sepia:     #8A6B3F;
  --muted:     #6B6860;
  --border:    #DDD9D2;
  --error:     #9B1C1C;
  --success:   #1A5C37;
  --radius:    6px;
  --font:      'Georgia', serif;
  --mono:      'Courier New', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:    #E4E2DD;
    --paper:  #2B2B2B;
    --sepia:  #C4A882;
    --muted:  #A9A7A1;
    --border: #3E3D3A;
  }
}

body {
  font-family: var(--font);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--sepia); }

.page-wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.wordmark {
  display: block;
  width: 80px;
  margin-bottom: 2rem;
}

h1 { font-size: 1.4rem; font-weight: normal; letter-spacing: .04em; margin-bottom: 1.2rem; }
h2 { font-size: 1rem; font-weight: normal; letter-spacing: .05em; text-transform: uppercase;
     color: var(--muted); margin: 1.8rem 0 .7rem; }

p { margin-bottom: .9rem; }

/* Form elements */
.field { margin-bottom: 1.1rem; }
.field label {
  display: block;
  font-size: .8rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .3rem;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: .5rem .7rem;
  border: 1px solid var(--border);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: .95rem;
  border-radius: var(--radius);
  appearance: none;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--sepia);
  box-shadow: 0 0 0 2px rgba(138,107,63,.15);
}
.field textarea { min-height: 80px; resize: vertical; }

/* Checkbox row */
.check-row {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  margin-bottom: .75rem;
  font-size: .9rem;
}
.check-row input[type=checkbox] {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  margin-top: .2rem;
  accent-color: var(--sepia);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: .6rem 1.4rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--font);
  font-size: .9rem;
  letter-spacing: .05em;
  cursor: pointer;
  border-radius: var(--radius);
  text-decoration: none;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-primary:hover { opacity: .85; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

/* Messages */
.msg {
  padding: .65rem 1rem;
  border-radius: var(--radius);
  font-size: .9rem;
  margin-top: 1rem;
}
.msg-error { background: #fff0f0; color: var(--error); border: 1px solid #f5c6c6; }
.msg-success { background: #f0fff4; color: var(--success); border: 1px solid #b3dec5; }
@media (prefers-color-scheme: dark) {
  .msg-error { background: #3b1010; border-color: #6e2020; }
  .msg-success { background: #0e2d1c; border-color: #1d5537; }
}

/* Option cards (A/B payment) */
.option-cards { display: flex; gap: .8rem; flex-direction: column; }
@media (min-width: 480px) { .option-cards { flex-direction: row; } }
.option-card {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  cursor: pointer;
  transition: border-color .15s;
  position: relative;
}
.option-card input[type=radio] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.option-card.selected {
  border-color: var(--sepia);
  box-shadow: 0 0 0 2px rgba(138,107,63,.2);
}
.option-card h3 { font-size: .9rem; font-weight: 600; margin-bottom: .3rem; }
.option-card p { font-size: .82rem; color: var(--muted); margin: 0; }

/* Slot grid */
.slot-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .6rem 0 1rem;
}
.slot-btn {
  padding: .4rem .9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: .88rem;
  cursor: pointer;
}
.slot-btn:hover, .slot-btn.selected { border-color: var(--sepia); background: var(--sepia); color: #fff; }

/* Progress steps */
.steps {
  display: flex;
  gap: .4rem;
  margin-bottom: 2rem;
}
.step {
  height: 3px;
  flex: 1;
  background: var(--border);
  border-radius: 2px;
}
.step.done { background: var(--sepia); }

.spinner {
  display: inline-block;
  width: 1em; height: 1em;
  border: 2px solid var(--border);
  border-top-color: var(--sepia);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }