:root {
  --cream: #F4EADD;
  --tan: #B89686;
  --dark-brown: #471506;
  --rose: #E49292;
  --font: Georgia, 'Times New Roman', serif;
}

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

html {
  font-size: 16px;
}

body {
  background: var(--cream);
  color: var(--dark-brown);
  font-family: var(--font);
  min-height: 100vh;
  padding: 0 0 80px;
}

a {
  color: var(--dark-brown);
}

/* Layout */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Header */
.site-header {
  text-align: center;
  padding: 32px 16px 0;
}

.site-header h1 {
  font-size: 1.1rem;
  font-weight: normal;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-brown);
}

.site-header .portal-label {
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dark-brown);
  margin-top: 6px;
}

/* Progress indicator */
.progress {
  text-align: center;
  font-size: 0.7rem;
  color: var(--tan);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 10px;
  opacity: 0.7;
}

/* Page title */
.page-title {
  font-size: 1.5rem;
  font-weight: normal;
  margin: 24px 0 8px;
}

.page-subtitle {
  color: var(--tan);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

/* Form */
.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tan);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--tan);
  background: var(--cream);
  color: var(--dark-brown);
  font-family: var(--font);
  font-size: 1rem;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: var(--dark-brown);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  font-family: var(--font);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--dark-brown);
  color: var(--cream);
  width: 100%;
  text-align: center;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.85;
}

.btn-secondary {
  background: transparent;
  color: var(--dark-brown);
  border: 1px solid var(--dark-brown);
  width: 100%;
  text-align: center;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--dark-brown);
  color: var(--cream);
}

.btn-row {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.btn-row .btn {
  flex: 1;
}

/* Error/info messages */
.error-msg {
  color: var(--rose);
  font-size: 0.875rem;
  margin-top: 8px;
  display: none;
}

.error-msg.visible {
  display: block;
}

.info-note {
  font-size: 0.8rem;
  color: var(--tan);
  margin-top: 8px;
  font-style: italic;
}

/* Loading spinner */
.loading {
  display: none;
  text-align: center;
  color: var(--tan);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 24px 0;
}

.loading.visible {
  display: block;
}

/* Item cards */
.item-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--tan);
  border-radius: 6px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  position: relative;
}

.item-card:hover {
  border-color: var(--dark-brown);
}

.item-card.selected {
  border-color: var(--dark-brown);
  background: rgba(71, 21, 6, 0.04);
}

.item-card.final-sale {
  opacity: 0.5;
  cursor: not-allowed;
}

.item-card.final-sale:hover {
  border-color: var(--tan);
  background: transparent;
}

.item-checkbox {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--dark-brown);
  cursor: pointer;
}

.item-checkbox:disabled {
  cursor: not-allowed;
}

.item-img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  background: #e8e0d8;
}

.item-info {
  flex: 1;
}

.item-title {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.item-variant {
  font-size: 0.78rem;
  color: var(--tan);
  margin-bottom: 4px;
}

.item-price {
  font-size: 0.85rem;
}

.final-sale-badge {
  display: inline-block;
  background: #ccc;
  color: #888;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 4px;
}

/* Select all row */
.select-all-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
}

/* Section headers */
.section-header {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tan);
  margin: 24px 0 12px;
  border-bottom: 1px solid var(--tan);
  padding-bottom: 6px;
}

/* Fee breakdown */
.fee-breakdown {
  border: 1px solid var(--tan);
  border-radius: 6px;
  padding: 16px;
  margin: 20px 0;
}

.fee-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.fee-row:last-child {
  margin-bottom: 0;
  font-size: 1rem;
  border-top: 1px solid var(--tan);
  padding-top: 10px;
  margin-top: 10px;
  font-weight: bold;
}

.fee-deduction {
  color: var(--rose);
}

/* Variant grid */
.variant-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 20px;
}

.variant-btn {
  padding: 8px 16px;
  border: 1px solid var(--tan);
  border-radius: 4px;
  background: var(--cream);
  color: var(--dark-brown);
  font-family: var(--font);
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.variant-btn:hover:not(.sold-out):not(.selected) {
  border-color: var(--dark-brown);
}

.variant-btn.selected {
  background: var(--dark-brown);
  color: var(--cream);
  border-color: var(--dark-brown);
}

.variant-btn.sold-out {
  opacity: 0.4;
  cursor: not-allowed;
  text-decoration: line-through;
}

/* Step indicator for exchange flow */
.step-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 0.75rem;
  color: var(--tan);
}

.step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tan);
}

.step-dot.active {
  background: var(--dark-brown);
}

/* Confirmation timeline */
.timeline {
  margin: 24px 0;
}

.timeline-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--dark-brown);
  flex-shrink: 0;
  margin-top: 5px;
}

.timeline-content {
  font-size: 0.85rem;
}

.timeline-step-title {
  font-weight: bold;
  margin-bottom: 2px;
}

.timeline-step-desc {
  color: var(--tan);
  font-size: 0.8rem;
}

/* Tracking number box */
.tracking-box {
  border: 1px solid var(--tan);
  border-radius: 6px;
  padding: 16px;
  margin: 16px 0;
  text-align: center;
}

.tracking-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tan);
  margin-bottom: 6px;
}

.tracking-number {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

/* Help button */
#help-btn {
  position: fixed;
  bottom: 24px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--dark-brown);
  color: #fff;
  font-size: 1.4rem;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(71, 21, 6, 0.3);
  z-index: 1000;
  transition: opacity 0.2s ease;
}

#help-btn:hover {
  opacity: 0.85;
}

/* Help panel */
#help-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--cream);
  border-top: 1px solid var(--tan);
  padding: 24px 20px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  z-index: 999;
  max-height: 80vh;
  overflow-y: auto;
}

#help-panel.open {
  transform: translateY(0);
}

@media (min-width: 640px) {
  #help-panel {
    bottom: 80px;
    left: auto;
    right: 20px;
    width: 340px;
    border: 1px solid var(--tan);
    border-radius: 8px;
    max-height: 400px;
  }
}

.help-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.help-panel-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#help-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--dark-brown);
}

/* Sold out notice */
.sold-out-notice {
  background: rgba(184, 150, 134, 0.1);
  border: 1px solid var(--tan);
  border-radius: 6px;
  padding: 16px;
  margin: 12px 0;
  font-size: 0.85rem;
  text-align: center;
  color: var(--tan);
}

/* Success state */
.success-icon {
  text-align: center;
  font-size: 2.5rem;
  margin: 32px 0 16px;
}

.success-title {
  text-align: center;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.success-subtitle {
  text-align: center;
  color: var(--tan);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

/* Exchange item header */
.exchange-item-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

/* Option groups */
.option-group {
  margin-bottom: 20px;
}

.option-group-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tan);
  margin-bottom: 10px;
}

/* Selected variant confirmation */
.selected-variant-label {
  font-size: 0.85rem;
  color: var(--dark-brown);
  background: rgba(71, 21, 6, 0.06);
  border-radius: 4px;
  padding: 8px 12px;
  margin-top: 4px;
}

/* Back link */
.back-link {
  font-size: 0.8rem;
  color: var(--tan);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.back-link:hover {
  color: var(--dark-brown);
}

/* Divider */
.divider {
  height: 1px;
  background: var(--tan);
  margin: 20px 0;
  opacity: 0.4;
}

/* Responsive */
@media (min-width: 640px) {
  .container {
    padding: 32px 24px;
  }
}