/* ============================================================
   2026 대한민국 보조공학기기 박람회 - 참관등록 스타일시트
   Mobile-first, WCAG AA compliant, accessible design
   ============================================================ */

/* ── Variables ── */
:root {
  --color-primary: #1e40af;
  --color-primary-dark: #1e3a8a;
  --color-primary-light: #3b82f6;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --color-success: #059669;
  --color-success-light: #d1fae5;
  --color-error: #dc2626;
  --color-error-light: #fee2e2;
  --color-warning: #d97706;
  --color-warning-light: #fef3c7;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-border: #d1d5db;
  --color-border-focus: #1e40af;
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-muted: #f3f4f6;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.06);
  --shadow-focus: 0 0 0 3px rgba(30,64,175,0.35);

  --font-base: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;

  --transition: 200ms ease;
  --transition-slow: 350ms ease;
}

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
}

a:hover, a:focus {
  color: var(--color-primary-dark);
}

/* ── Skip Navigation ── */
.skip-nav {
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  font-weight: 600;
  text-decoration: none;
  z-index: 9999;
  transition: top var(--transition);
}

.skip-nav:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 0;
}

/* ── Screen Reader Only ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Live Region ── */
#aria-live {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ── Header ── */
/* Header styles inherited from common.css */

/* Reduce gap between page-hero and content on mobile */
@media (max-width: 599px) {
  .page-hero { padding: 5rem 0 1rem; }
  main { padding-top: 0 !important; }
  .landing-hero { padding-top: 0; }
  .back-link { margin-top: 0.5rem; }
}

/* ── Main Content ── */
main {
  padding: 0 1rem 1rem;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

/* ── Footer ── */
.site-footer {
  padding: 3rem 0;
  background: #1e293b;
  color: #94a3b8;
  font-size: 0.85rem;
  line-height: 1.8;
  margin-top: auto;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-brand {
  font-weight: 700;
  color: #e2e8f0;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover { color: #e2e8f0; }

/* ── Page Views ── */
.view {
  display: none;
}

.view.active {
  display: block;
  animation: fadeIn var(--transition-slow) ease;
}

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

/* ── Landing Page ── */
.landing-hero {
  text-align: center;
  padding: 0.5rem 0 1rem;
}

.landing-hero .event-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  letter-spacing: 0.03em;
  margin-bottom: 1rem;
}

.landing-hero h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 0.5rem;
  word-break: keep-all;
}

.landing-hero .event-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.75rem;
}

.landing-hero .event-meta .meta-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.landing-hero .event-meta .meta-item .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.landing-divider {
  height: 1px;
  background: var(--color-border);
  margin: 1.5rem 0;
}

.landing-section-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1rem;
  text-align: center;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.action-card {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  text-decoration: none;
  color: inherit;
  position: relative;
}

.action-card:hover,
.action-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  outline: none;
}

.action-card:focus-visible {
  box-shadow: var(--shadow-focus);
}

.action-card.card-primary {
  border-color: var(--color-primary-light);
  background: linear-gradient(135deg, #eff6ff 0%, #fff 100%);
}

.action-card.card-accent {
  border-color: #fbbf24;
  background: linear-gradient(135deg, #fffbeb 0%, #fff 100%);
}

.action-card.card-neutral {
  border-color: var(--color-border);
  background: linear-gradient(135deg, #f9fafb 0%, #fff 100%);
}

.action-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.5rem;
}

.card-primary .card-icon { background: #dbeafe; }
.card-accent .card-icon  { background: #fef3c7; }
.card-neutral .card-icon { background: #f3f4f6; }

.action-card .card-body {
  flex: 1;
}

.action-card .card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.2rem;
}

.action-card .card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.action-card .card-arrow {
  flex-shrink: 0;
  color: var(--color-text-light);
  transition: transform var(--transition);
}

.action-card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--color-primary);
}

/* ── Step Indicator ── */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  gap: 0;
}

.step-indicator .step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 1;
}

.step-indicator .step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 16px;
  left: calc(50% + 16px);
  right: calc(-50% + 16px);
  height: 2px;
  background: var(--color-border);
  transition: background var(--transition-slow);
}

.step-indicator .step-item.completed:not(:last-child)::after,
.step-indicator .step-item.active:not(:last-child)::after {
  background: var(--color-primary);
}

.step-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-light);
  transition: all var(--transition-slow);
  z-index: 1;
}

.step-item.active .step-circle {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.step-item.completed .step-circle {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.step-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: 0.4rem;
  text-align: center;
  transition: color var(--transition);
  white-space: nowrap;
}

.step-item.active .step-label,
.step-item.completed .step-label {
  color: var(--color-primary);
  font-weight: 600;
}

/* ── Form Page ── */
.form-page-header {
  margin-bottom: 1.5rem;
}

.form-page-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.form-page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 1rem;
  padding: 0.25rem 0;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--color-primary);
  outline: none;
}

/* ── Steps Container ── */
.step-container {
  display: none;
}

.step-container.active {
  display: block;
  animation: fadeIn var(--transition) ease;
}

/* ── Privacy Box ── */
.privacy-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.privacy-card h2 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.privacy-text-box {
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  height: 160px;
  overflow-y: auto;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  tab-size: 2;
  white-space: pre-wrap;
}

.privacy-text-box:focus {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 0;
}

/* ── Form Elements ── */
.form-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.form-card h2 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.form-label .required-mark {
  color: var(--color-error);
  margin-left: 0.2rem;
  font-weight: 700;
}

.form-label .optional-tag {
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--color-text-light);
  margin-left: 0.4rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: 44px;
  padding: 0.625rem 0.875rem;
  font-size: var(--font-size-base);
  font-family: var(--font-base);
  color: var(--color-text);
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: #9ca3af;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-focus);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
  background: #fff8f8;
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(220,38,38,0.2);
}

.form-input.valid,
.form-textarea.valid {
  border-color: var(--color-success);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

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

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 0.35rem;
  display: flex;
  align-items: flex-start;
  gap: 0.25rem;
}

.form-hint-strong {
  font-size: var(--font-size-sm);
  color: var(--color-primary-dark);
  background: #eff6ff;
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: 0.35rem;
  display: none;
  align-items: flex-start;
  gap: 0.25rem;
}

.form-error.visible {
  display: flex;
}

.form-error svg,
.form-hint svg {
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* ── Checkbox & Radio ── */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  min-width: 20px;
  accent-color: var(--color-primary);
  cursor: pointer;
  margin-top: 0.1rem;
  border-radius: 4px;
}

.checkbox-item .checkbox-label {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.4;
}

.checkbox-item .checkbox-label .optional-tag {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-left: 0.3rem;
}

.checkbox-item input[type="checkbox"]:focus-visible + .checkbox-label::before {
  outline: 2px solid var(--color-border-focus);
}

/* ── Radio Group ── */
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.radio-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: border-color var(--transition), background var(--transition);
  white-space: nowrap;
}

.radio-item:hover {
  border-color: var(--color-primary-light);
  background: #f0f7ff;
}

.radio-item:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.radio-item input[type="radio"] {
  display: none;
}

.radio-label {
  font-weight: 500;
  line-height: 1.4;
}

/* ── Selection Checkbox Group ── */
.sel-checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

@media (max-width: 480px) {
  .sel-checkbox-group {
    grid-template-columns: 1fr;
  }
}

.sel-checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.25rem;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: background var(--transition);
}

.sel-checkbox-item:hover {
  background: #f0f7ff;
}

.sel-checkbox-item:has(input:checked) {
  background: #eff6ff;
}

.sel-checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.sel-checkbox-item span {
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
}

.sel-max-hint {
  font-size: var(--font-size-xs);
  color: var(--color-warning);
  margin-top: 0.3rem;
  min-height: 1rem;
}

/* ── Companion Section ── */
.companion-section {
  margin-top: 0.5rem;
  padding: 1rem;
  border-left: 3px solid var(--color-primary-light);
  background: #f8faff;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.companion-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.companion-label .optional-tag {
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--color-text-light);
  margin-left: 0.3rem;
}

.companion-info-msg {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: var(--color-warning-light);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: #92400e;
  line-height: 1.4;
}

.companion-info-msg svg {
  flex-shrink: 0;
  color: var(--color-warning);
}

/* ── Check Result Items ── */
.check-result-item {
  margin-top: 1rem;
}

.check-result-item + .check-result-item {
  margin-top: 0.75rem;
}

/* ── Consent Items ── */
.consent-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: #fff;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.consent-item:hover {
  border-color: var(--color-primary-light);
  background: #f0f7ff;
}

.consent-item input[type="checkbox"] {
  width: 22px;
  height: 22px;
  min-width: 22px;
  accent-color: var(--color-primary);
  cursor: pointer;
  margin-top: 0.05rem;
}

.consent-item .consent-text {
  flex: 1;
}

.consent-item .consent-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.consent-item .consent-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 0.2rem;
  line-height: 1.4;
}

.consent-required-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-error);
  background: var(--color-error-light);
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 0.1rem;
}

.consent-optional-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-muted);
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 0.1rem;
}

/* ── Accessibility Checkboxes ── */
.accessibility-card {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.accessibility-card .accessibility-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.625rem 1.5rem;
  font-size: var(--font-size-base);
  font-family: var(--font-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  line-height: 1;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.btn:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 2px;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-bg-muted);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: #e5e7eb;
  border-color: #9ca3af;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: #eff6ff;
}

.btn-full {
  width: 100%;
}

.btn-lg {
  min-height: 52px;
  font-size: var(--font-size-lg);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-lg);
}

/* Loading spinner inside button */
.btn .spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn.loading .spinner {
  display: block;
}

.btn.loading .btn-text {
  opacity: 0.7;
}

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

/* ── Button Row ── */
.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-row .btn {
  flex: 1;
  min-width: 0;
}

/* ── Check Tabs ── */
.check-tabs {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.check-tab {
  flex: 1;
  padding: 0.75rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  min-height: 44px;
  font-family: var(--font-base);
}

.check-tab.active {
  background: var(--color-primary);
  color: #fff;
}

.check-tab:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: -3px;
  z-index: 1;
}

.check-tab:not(.active):hover {
  background: #e5e7eb;
  color: var(--color-text);
}

.check-panel {
  display: none;
}

.check-panel.active {
  display: block;
  animation: fadeIn var(--transition) ease;
}

/* ── Registration Result ── */
.result-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.result-card .result-header {
  background: var(--color-primary);
  color: #fff;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-card .result-title {
  font-weight: 700;
  font-size: var(--font-size-base);
}

.result-card .result-body {
  padding: 1.25rem;
}

.result-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-bg-muted);
  font-size: var(--font-size-sm);
}

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

.result-label {
  width: 100px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  font-weight: 500;
}

.result-value {
  flex: 1;
  color: var(--color-text);
  font-weight: 600;
  word-break: break-all;
}

/* ── Status Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.badge-pending {
  background: #fef3c7;
  color: #92400e;
}

.badge-approved {
  background: #d1fae5;
  color: #065f46;
  border: 1.5px solid #6ee7b7;
  font-weight: 700;
}

.badge-cancelled {
  background: #fee2e2;
  color: #991b1b;
  border: 1.5px solid #fca5a5;
}

/* ── Success / Complete ── */
.success-container {
  text-align: center;
  padding: 2rem 0;
}

.success-icon-wrap {
  width: 80px;
  height: 80px;
  background: var(--color-success-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}

.success-icon-wrap svg {
  width: 40px;
  height: 40px;
  color: var(--color-success);
}

.success-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.success-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.reg-code-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2563eb 100%);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  margin: 0 auto 1.25rem;
  max-width: 340px;
}

.reg-code-box .reg-code-label {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.75);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.reg-code-box .reg-code-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}

.info-notice {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  margin-bottom: 1rem;
  font-size: var(--font-size-sm);
  color: #92400e;
  display: flex;
  gap: 0.625rem;
  align-items: flex-start;
  text-align: left;
}

.info-notice svg {
  flex-shrink: 0;
  margin-top: 0.1rem;
  color: var(--color-warning);
}

.info-notice-blue {
  background: #eff6ff;
  border-color: #93c5fd;
  color: #1e40af;
}

.info-notice-blue svg {
  color: var(--color-primary);
}

/* ── Confetti animation ── */
.confetti-dots {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
  overflow: hidden;
}

.confetti-dot {
  position: absolute;
  top: -10px;
  border-radius: 50%;
  animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ── Not Found State ── */
.not-found-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-text-muted);
}

.not-found-state .nf-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
}

.not-found-state p {
  font-size: var(--font-size-sm);
}

/* ── Alert Box ── */
.alert {
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  display: flex;
  gap: 0.625rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.alert svg {
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.alert-error {
  background: var(--color-error-light);
  color: #7f1d1d;
  border: 1px solid #fca5a5;
}

.alert-success {
  background: var(--color-success-light);
  color: #064e3b;
  border: 1px solid #6ee7b7;
}

/* ── Loading overlay ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  backdrop-filter: blur(2px);
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Divider ── */
.section-divider {
  height: 1px;
  background: var(--color-border);
  margin: 1.25rem 0;
}

/* ── Responsive ── */
@media (min-width: 480px) {
  main {
    padding: 1.5rem 1.0rem;
    padding-top: calc(1.5rem);
  }

  .landing-hero h1 {
    font-size: var(--font-size-3xl);
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .landing-hero .event-meta {
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
  }
}

/* Mobile menu styles inherited from common.css */

@media (min-width: 600px) {
  main {
    padding: 2rem 1.5rem;
  }

  .btn-row {
    flex-wrap: nowrap;
  }

  .step-label {
    font-size: var(--font-size-sm);
  }
}

@media (min-width: 720px) {
  main {
    padding: 2.5rem 2rem;
  }
}

/* ── Focus styles for keyboard navigation ── */
*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Print ── */
@media print {
  .site-header,
  .site-footer,
  .btn-row,
  .back-link {
    display: none;
  }

  .reg-code-box {
    background: #f3f4f6 !important;
    color: #111827 !important;
    border: 2px solid #111827;
    print-color-adjust: exact;
  }

  .reg-code-box .reg-code-value {
    color: #111827 !important;
  }
}

/* ── Accessibility Info Bar ── */
.accessibility-bar {
  background: #1e3a5f;
  color: #fff;
  font-size: var(--font-size-xs);
  line-height: 1.5;
  z-index: 101;
}

.accessibility-bar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.accessibility-bar p {
  margin: 0;
}

.accessibility-bar kbd {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 3px;
  padding: 0 0.35rem;
  font-size: 0.7rem;
  font-family: inherit;
}

.accessibility-bar-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  line-height: 1;
  border-radius: 4px;
  flex-shrink: 0;
}

.accessibility-bar-close:hover,
.accessibility-bar-close:focus-visible {
  background: rgba(255,255,255,0.15);
}

/* Header top position inherited from common.css */

/* ── Font Size & High Contrast Controls ── */
.a11y-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.font-size-controls {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.font-size-btn {
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  color: var(--color-text-muted);
  font-family: var(--font-base);
  font-weight: 700;
  line-height: 1;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.font-size-btn[data-size="100"] {
  width: 28px;
  height: 28px;
  font-size: 0.7rem;
}

.font-size-btn[data-size="120"] {
  width: 30px;
  height: 30px;
  font-size: 0.85rem;
}

.font-size-btn[data-size="140"] {
  width: 32px;
  height: 32px;
  font-size: 1rem;
}

.font-size-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.font-size-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.high-contrast-btn {
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-base);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  line-height: 1.4;
}

.high-contrast-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.high-contrast-btn.active {
  background: #000;
  border-color: #ffff00;
  color: #ffff00;
}

/* ── High Contrast Mode ── */
body.high-contrast {
  background: #000 !important;
  color: #fff !important;
}

body.high-contrast a {
  color: #00ffff !important;
}

body.high-contrast *:focus-visible {
  outline: 3px solid #ffff00 !important;
  outline-offset: 2px;
}

/* High contrast header styles inherited from common.css */

body.high-contrast .accessibility-bar {
  background: #000 !important;
  border-bottom: 1px solid #ffff00;
}

body.high-contrast .font-size-btn {
  border-color: #fff !important;
  color: #fff !important;
}

body.high-contrast .font-size-btn.active {
  background: #ffff00 !important;
  border-color: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .high-contrast-btn {
  background: #ffff00 !important;
  border-color: #ffff00 !important;
  color: #000 !important;
}

/* Landing page */
body.high-contrast .landing-hero h1 {
  color: #ffff00 !important;
}

body.high-contrast .landing-hero .event-badge {
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .landing-hero .event-meta .meta-item {
  color: #fff !important;
}

body.high-contrast .landing-divider {
  background: #ffff00 !important;
}

body.high-contrast .landing-section-title {
  color: #fff !important;
}

/* Cards */
body.high-contrast .action-card {
  background: #111 !important;
  border-color: #fff !important;
}

body.high-contrast .action-card:hover,
body.high-contrast .action-card:focus-visible {
  border-color: #ffff00 !important;
}

body.high-contrast .action-card .card-title {
  color: #fff !important;
}

body.high-contrast .action-card .card-desc {
  color: #ccc !important;
}

body.high-contrast .action-card .card-arrow {
  color: #ffff00 !important;
}

body.high-contrast .card-primary .card-icon,
body.high-contrast .card-accent .card-icon,
body.high-contrast .card-neutral .card-icon {
  background: #333 !important;
}

/* Form cards */
body.high-contrast .form-card,
body.high-contrast .privacy-card {
  background: #111 !important;
  border-color: #fff !important;
}

body.high-contrast .form-card h2 {
  color: #ffff00 !important;
  border-bottom-color: #555 !important;
}

body.high-contrast .privacy-card h2 {
  color: #ffff00 !important;
}

body.high-contrast .form-label {
  color: #fff !important;
}

body.high-contrast .form-input,
body.high-contrast .form-select,
body.high-contrast .form-textarea {
  background: #222 !important;
  color: #fff !important;
  border-color: #888 !important;
}

body.high-contrast .form-input:focus,
body.high-contrast .form-select:focus,
body.high-contrast .form-textarea:focus {
  border-color: #ffff00 !important;
  box-shadow: 0 0 0 3px rgba(255,255,0,0.4) !important;
}

body.high-contrast .form-input::placeholder,
body.high-contrast .form-textarea::placeholder {
  color: #999 !important;
}

body.high-contrast .form-hint {
  color: #ccc !important;
}

body.high-contrast .form-error {
  color: #ff6666 !important;
}

body.high-contrast .privacy-text-box {
  background: #222 !important;
  color: #ccc !important;
  border-color: #888 !important;
}

body.high-contrast .privacy-text-box:focus {
  outline-color: #ffff00 !important;
}

/* Step indicator */
body.high-contrast .step-circle {
  border-color: #888 !important;
  background: #222 !important;
  color: #ccc !important;
}

body.high-contrast .step-item.active .step-circle {
  border-color: #ffff00 !important;
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .step-item.completed .step-circle {
  border-color: #ffff00 !important;
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .step-label {
  color: #ccc !important;
}

body.high-contrast .step-item.active .step-label,
body.high-contrast .step-item.completed .step-label {
  color: #ffff00 !important;
}

body.high-contrast .step-indicator .step-item:not(:last-child)::after {
  background: #555 !important;
}

body.high-contrast .step-indicator .step-item.completed:not(:last-child)::after,
body.high-contrast .step-indicator .step-item.active:not(:last-child)::after {
  background: #ffff00 !important;
}

/* Consent items */
body.high-contrast .consent-item {
  background: #222 !important;
  border-color: #888 !important;
}

body.high-contrast .consent-item:hover {
  border-color: #ffff00 !important;
  background: #333 !important;
}

body.high-contrast .consent-title {
  color: #fff !important;
}

body.high-contrast .consent-desc {
  color: #ccc !important;
}

body.high-contrast .consent-required-badge {
  background: #660000 !important;
  color: #ff6666 !important;
}

body.high-contrast .consent-optional-badge {
  background: #333 !important;
  color: #ccc !important;
}

/* Checkbox items */
body.high-contrast .checkbox-item .checkbox-label {
  color: #fff !important;
}

body.high-contrast .accessibility-card {
  background: #111 !important;
  border-color: #888 !important;
}

body.high-contrast .accessibility-card .accessibility-title {
  color: #ffff00 !important;
}

/* Buttons */
body.high-contrast .btn-primary {
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .btn-primary:hover:not(:disabled) {
  background: #cccc00 !important;
}

body.high-contrast .btn-secondary {
  background: #333 !important;
  color: #fff !important;
  border-color: #fff !important;
}

body.high-contrast .btn-secondary:hover:not(:disabled) {
  background: #555 !important;
}

body.high-contrast .btn-outline {
  color: #ffff00 !important;
  border-color: #ffff00 !important;
}

body.high-contrast .btn-outline:hover:not(:disabled) {
  background: #333 !important;
}

/* Check tabs */
body.high-contrast .check-tabs {
  border-color: #fff !important;
}

body.high-contrast .check-tab {
  background: #222 !important;
  color: #ccc !important;
}

body.high-contrast .check-tab.active {
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .check-tab:not(.active):hover {
  background: #444 !important;
  color: #fff !important;
}

/* Success page */
body.high-contrast .success-icon-wrap {
  background: #003300 !important;
}

body.high-contrast .success-icon-wrap svg {
  color: #00ff00 !important;
}

body.high-contrast .success-title {
  color: #fff !important;
}

body.high-contrast .success-subtitle {
  color: #ccc !important;
}

body.high-contrast .reg-code-box {
  background: #333 !important;
  border: 2px solid #ffff00;
}

body.high-contrast .info-notice {
  background: #332200 !important;
  border-color: #ffff00 !important;
  color: #ffff00 !important;
}

body.high-contrast .info-notice svg {
  color: #ffff00 !important;
}

body.high-contrast .info-notice-blue {
  background: #001133 !important;
  border-color: #00ffff !important;
  color: #00ffff !important;
}

body.high-contrast .info-notice-blue svg {
  color: #00ffff !important;
}

/* Result card */
body.high-contrast .result-card {
  background: #111 !important;
  border-color: #fff !important;
}

body.high-contrast .result-card .result-header {
  background: #ffff00 !important;
  color: #000 !important;
}

body.high-contrast .result-row {
  border-bottom-color: #333 !important;
}

body.high-contrast .result-label {
  color: #ccc !important;
}

body.high-contrast .result-value {
  color: #fff !important;
}

/* Alert */
body.high-contrast .alert-error {
  background: #330000 !important;
  color: #ff6666 !important;
  border-color: #ff6666 !important;
}

/* Back link */
body.high-contrast .back-link {
  color: #00ffff !important;
}

body.high-contrast .form-page-title {
  color: #fff !important;
}

body.high-contrast .form-page-subtitle {
  color: #ccc !important;
}

/* Badges */
body.high-contrast .badge-pending {
  background: #332200 !important;
  color: #ffff00 !important;
}

body.high-contrast .badge-approved {
  background: #003300 !important;
  color: #00ff00 !important;
}

body.high-contrast .badge-cancelled {
  background: #330000 !important;
  color: #ff6666 !important;
}

/* Footer */
body.high-contrast .site-footer {
  background: #000 !important;
  border-top: 1px solid #ffff00;
}

body.high-contrast .footer-brand {
  color: #ffff00 !important;
}

body.high-contrast .site-footer p,
body.high-contrast .site-footer {
  color: #ccc !important;
}

/* Loading overlay */
body.high-contrast .loading-overlay {
  background: rgba(0,0,0,0.9) !important;
}

body.high-contrast .loading-spinner {
  border-color: #555 !important;
  border-top-color: #ffff00 !important;
}

/* Skip nav */
body.high-contrast .skip-nav {
  background: #ffff00 !important;
  color: #000 !important;
}

/* Hide a11y controls on very small screens */
@media (max-width: 480px) {
  .a11y-controls {
    display: none;
  }

  .accessibility-bar-inner {
    font-size: 0.65rem;
    padding: 0.4rem 1rem;
  }
}

/* a11y-controls hidden via common.css on mobile */

/* ── High contrast mode support ── */
@media (forced-colors: active) {
  .action-card,
  .form-input,
  .form-select,
  .form-textarea {
    border: 2px solid ButtonText;
  }

  .btn-primary {
    forced-color-adjust: none;
    background: Highlight;
    color: HighlightText;
  }
}