:root {
  --font-body: 'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-head: 'Plus Jakarta Sans', system-ui, sans-serif;

  /* Light theme */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-text: #0f172a;
  --color-text-2: #334155;
  --color-text-3: #64748b;
  --color-border: #e2e8f0;
  --color-border-dashed: #cbd5e1;
  --color-primary: #2563eb;
  --color-primary-600: #1d4ed8;
  --color-primary-50: #eff6ff;
  --color-accent: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-error-bg: #fef2f2;
  --color-error-border: #fecaca;
  --color-error-text: #991b1b;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.12);
  --overlay-bg: rgba(15, 23, 42, 0.6);
  --radius: 1.25rem;
  --radius-sm: 0.75rem;
}

html[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-2: #334155;
  --color-text: #f8fafc;
  --color-text-2: #e2e8f0;
  --color-text-3: #94a3b8;
  --color-border: #475569;
  --color-border-dashed: #64748b;
  --color-primary: #3b82f6;
  --color-primary-600: #60a5fa;
  --color-primary-50: #1e3a8a;
  --color-accent: #10b981;
  --color-warning: #fbbf24;
  --color-danger: #f87171;
  --color-error-bg: #450a0a;
  --color-error-border: #7f1d1d;
  --color-error-text: #fecaca;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --overlay-bg: rgba(0, 0, 0, 0.7);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

img {
  max-width: 100%;
  display: block;
}

/* App header */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.header-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 0.875rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
}

.logo-mark {
  width: 1.875rem;
  height: 1.875rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 800;
}

.logo-text {
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--color-primary);
  font-weight: 600;
  margin-left: 0.2rem;
}

.progress-dots {
  display: flex;
  gap: 0.375rem;
  flex: 1;
  justify-content: center;
}

.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-border);
  transition: background 0.2s ease, width 0.2s ease;
}

.dot.is-active {
  background: var(--color-primary);
  width: 1.25rem;
  border-radius: 999px;
}

.theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-2);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.theme-toggle svg {
  width: 1.125rem;
  height: 1.125rem;
}

.icon-moon {
  display: none;
}

html[data-theme="dark"] .icon-sun {
  display: none;
}

html[data-theme="dark"] .icon-moon {
  display: block;
}

/* Wizard layout */
.wizard {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-top: 3.75rem;
  padding-bottom: 5.5rem;
}

.wizard-form {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.wizard-step {
  display: none;
  animation: fadeIn 0.25s ease;
  padding: 1.25rem;
}

.wizard-step.is-active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.step-content {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.step-header {
  margin-bottom: 1.5rem;
}

.step-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

.step-header h1 {
  font-family: var(--font-head);
  font-size: 1.625rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  color: var(--color-text);
}

.step-lead {
  color: var(--color-text-2);
  font-size: 0.9375rem;
  margin: 0;
}

/* Steps list (How it works) */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: var(--color-primary-50);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.step-item .step-num {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.step-text h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  margin: 0 0 0.25rem;
  color: var(--color-text);
}

.step-text p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-2);
}

/* Stores list */
.stores-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.store-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.store-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.2s ease;
}

.store-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.store-text h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  margin: 0 0 0.125rem;
  color: var(--color-text);
}

.store-text p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-3);
}

/* Card sample */
.card-sample {
  margin-bottom: 1.25rem;
  text-align: center;
}

.upload-notice {
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text-2);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.upload-notice strong {
  color: var(--color-text);
}

.sample-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-2);
  margin: 0 0 0.75rem;
}

.sample-label span {
  color: var(--color-primary);
}

.sample-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.sample-figure {
  margin: 0;
}

.sample-figure figcaption {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-3);
  margin-top: 0.375rem;
}

.sample-img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  display: block;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.sample-caption {
  font-size: 0.8125rem;
  color: var(--color-text-3);
  margin: 0;
  line-height: 1.5;
  text-align: left;
}

@media (max-width: 400px) {
  .sample-grid {
    grid-template-columns: 1fr;
  }

  .sample-img {
    height: 140px;
  }
}

/* Form elements */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label,
.form-group .field-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.req {
  color: var(--color-danger);
}

.field-hint,
.upload-hint {
  font-size: 0.8125rem;
  color: var(--color-text-3);
  margin: 0.375rem 0 0;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.2s ease, color 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.input-prefix {
  position: relative;
}

.input-prefix .prefix {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 600;
  color: var(--color-text-3);
  pointer-events: none;
}

.input-prefix input {
  padding-left: 2rem;
}

textarea {
  resize: vertical;
  min-height: 5rem;
}

.choice-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.choice-btn {
  flex: 1;
  min-width: 80px;
}

.choice-btn input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice-btn span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-2);
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--color-surface);
}

.choice-btn span:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.choice-btn input:checked + span {
  border-color: var(--color-primary);
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

/* Upload */
.upload-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2rem 1rem;
  text-align: center;
  transition: border-color 0.15s ease, background 0.15s ease;
  background: var(--color-surface);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-50);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-zone.has-files input[type="file"] {
  display: none;
}

.upload-placeholder svg {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.upload-placeholder span {
  display: block;
  font-weight: 600;
  color: var(--color-text-2);
}

.upload-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.75rem;
  position: relative;
  z-index: 2;
  pointer-events: auto;
}

.preview-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.preview-item img {
  width: 100%;
  height: 90px;
  object-fit: cover;
  display: block;
}

.preview-item .preview-name {
  font-size: 0.6875rem;
  color: var(--color-text-3);
  padding: 0.375rem 0.5rem;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preview-item .btn-remove {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  width: 1.5rem;
  height: 1.5rem;
  border: none;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.7);
  color: #fff;
  font-size: 0.875rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-item .btn-remove:hover {
  background: var(--color-danger);
}

.btn-add-more {
  width: 100%;
  margin-top: 0.75rem;
  background: transparent;
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1.5px var(--color-primary);
  flex: none;
}

.btn-add-more:hover {
  background: var(--color-primary-50);
}

/* Consent */
.form-consent {
  margin-top: 1.5rem;
}

.checkbox-label {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  cursor: pointer;
  font-size: 0.8125rem;
  color: var(--color-text-2);
  line-height: 1.5;
}

.checkbox-label input {
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.125rem;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* Review card */
.review-card {
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: background 0.2s ease;
}

.review-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.review-row:last-child {
  border-bottom: none;
}

.review-row span {
  color: var(--color-text-3);
}

.review-row strong {
  color: var(--color-text);
  font-weight: 600;
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

.review-note {
  font-size: 0.8125rem;
  color: var(--color-text-3);
  text-align: center;
  margin: 0;
}

/* Form error */
.form-error {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error-text);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  margin: 0 1.25rem 1rem;
  font-size: 0.9375rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* Action bar */
.action-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1rem;
  display: flex;
  gap: 0.75rem;
  max-width: 640px;
  margin: 0 auto;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  flex: 1;
}

.btn-next,
.btn-submit,
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-next:hover,
.btn-submit:hover,
.btn-primary:hover {
  background: var(--color-primary-600);
}

.btn-back,
.btn-ghost {
  background: transparent;
  color: var(--color-text-2);
  box-shadow: inset 0 0 0 1.5px var(--color-border);
  flex: 0 0 auto;
  min-width: 80px;
}

.btn-text {
  padding: 0;
  background: transparent;
  color: var(--color-danger);
  font-weight: 500;
  flex: 0 0 auto;
}

.btn-text:hover {
  text-decoration: underline;
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-loading::before {
  content: '';
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.honeypot {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  left: -9999px;
}

/* Success overlay */
.success-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--overlay-bg);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow-y: auto;
}

.success-overlay.is-visible {
  display: flex;
}

.success-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  width: min(100%, 420px);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 1.75rem;
  text-align: center;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.success-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
}

.success-icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.success-card h2 {
  font-family: var(--font-head);
  font-size: 1.375rem;
  margin: 0 0 0.75rem;
  color: var(--color-text);
}

.success-card > p {
  color: var(--color-text-2);
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
}

.receipt {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: left;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.receipt-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--color-border-dashed);
}

.receipt-brand .logo-mark {
  width: 1.75rem;
  height: 1.75rem;
  font-size: 0.625rem;
}

.receipt-brand strong {
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--color-text);
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.receipt-row:last-of-type {
  border-bottom: none;
}

.receipt-row span {
  color: var(--color-text-3);
}

.receipt-row strong {
  color: var(--color-text);
  font-weight: 600;
}

.status-pending {
  color: var(--color-warning) !important;
}

.success-actions {
  display: flex;
  gap: 0.75rem;
  flex-direction: column;
}

.success-actions .btn {
  width: 100%;
}

/* Desktop tweaks */
@media (min-width: 641px) {
  .wizard {
    padding-top: 5rem;
    padding-bottom: 6rem;
  }

  .step-content {
    padding: 2rem;
  }

  .step-header h1 {
    font-size: 1.875rem;
  }

  .action-bar {
    padding: 1.25rem 1rem;
  }
}