:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-code: #0f172a;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;

  --pass-color: #059669;
  --pass-bg: #ecfdf5;
  --pass-border: #a7f3d0;

  --warn-color: #d97706;
  --warn-bg: #fffbeb;
  --warn-border: #fde68a;

  --fail-color: #dc2626;
  --fail-bg: #fef2f2;
  --fail-border: #fecaca;

  --info-color: #0284c7;
  --info-bg: #f0f9ff;
  --info-border: #bae6fd;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.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;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #ffffff;
}

.brand-name {
  display: block;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-tag {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--pass-bg);
  color: var(--pass-color);
  border: 1px solid var(--pass-border);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pass-color);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-sm {
  font-size: 0.82rem;
  padding: 6px 12px;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: #bfdbfe;
}

.btn-secondary:hover {
  background: #dbeafe;
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

/* Hero Section */
.main-content {
  padding-top: 28px;
  padding-bottom: 56px;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 28px;
}

.hero-top h1 {
  margin: 0 0 8px 0;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  margin: 0 0 22px 0;
  color: var(--text-secondary);
  font-size: 0.98rem;
}

.inbox-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 18px;
}

.inbox-input-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.inbox-Step-badge {
  background: #1e293b;
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border-radius: 6px;
}

.recipient-input {
  flex: 1;
  min-width: 240px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--primary);
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

.inbox-helper {
  margin: 10px 0 0 0;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.inbox-helper code {
  background: #e2e8f0;
  color: #0f172a;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.79rem;
}

/* Waiting Banner */
.waiting-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--info-bg);
  border: 1px solid var(--info-border);
  margin-bottom: 20px;
}

.waiting-banner.completed {
  background: var(--pass-bg);
  border-color: var(--pass-border);
}

.pulse-ring {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--info-color);
  flex-shrink: 0;
  animation: pulseAnim 1.6s infinite ease-in-out;
}

.waiting-banner.completed .pulse-ring {
  background: var(--pass-color);
  animation: none;
}

@keyframes pulseAnim {
  0% {
    box-shadow: 0 0 0 0 rgba(2, 132, 199, 0.5);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(2, 132, 199, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(2, 132, 199, 0);
  }
}

.waiting-text {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
}

.waiting-text span {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

/* Quick Demo Buttons */
.quick-demos-header {
  margin-bottom: 10px;
}

.quick-demos-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.demo-buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
}

.demo-card-btn {
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  font-family: inherit;
}

.demo-card-btn:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.demo-badge {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}

.badge-pass {
  background: var(--pass-bg);
  color: var(--pass-color);
  border: 1px solid var(--pass-border);
}

.badge-warn {
  background: var(--warn-bg);
  color: var(--warn-color);
  border: 1px solid var(--warn-border);
}

.badge-fail {
  background: var(--fail-bg);
  color: var(--fail-color);
  border: 1px solid var(--fail-border);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info-color);
  border: 1px solid var(--info-border);
}

.demo-title {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text-main);
}

.demo-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Score Hero Card */
.score-hero-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 28px;
}

@media (max-width: 780px) {
  .score-hero-card {
    grid-template-columns: 1fr;
  }
}

.score-gauge-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--border-color);
  padding-right: 20px;
}

@media (max-width: 780px) {
  .score-gauge-col {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-right: 0;
    padding-bottom: 20px;
  }
}

.score-gauge {
  position: relative;
  width: 152px;
  height: 152px;
  margin-bottom: 12px;
}

.gauge-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.gauge-track {
  fill: none;
  stroke: #e2e8f0;
  stroke-width: 12;
}

.gauge-fill {
  fill: none;
  stroke: var(--score-color, #059669);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 364.4;
  stroke-dashoffset: calc(364.4 - (364.4 * var(--score-pct, 100)) / 100);
  transition: stroke-dashoffset 0.6s cubic-bezier(0.22, 1, 0.36, 1), stroke 0.3s ease;
}

.gauge-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-number {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-main);
}

.score-denominator {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 2px;
}

.grade-pill {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  text-align: center;
}

.grade-pass {
  background: var(--pass-bg);
  color: var(--pass-color);
  border: 1px solid var(--pass-border);
}

.grade-warn {
  background: var(--warn-bg);
  color: var(--warn-color);
  border: 1px solid var(--warn-border);
}

.grade-fail {
  background: var(--fail-bg);
  color: var(--fail-color);
  border: 1px solid var(--fail-border);
}

.report-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.verdict-title {
  margin: 0 0 6px 0;
  font-size: 1.35rem;
}

.verdict-summary {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.report-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Metadata Grid */
.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 10px;
  margin: 0 0 18px 0;
  padding: 14px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.meta-item dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.meta-item dd {
  margin: 2px 0 0 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  word-break: break-all;
}

.quick-badges-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.protocol-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 6px;
}

/* Categories & Native <details> Accordions */
.section-title {
  font-size: 1.2rem;
  margin: 0 0 14px 0;
}

.categories-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.category-details {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.category-details[open] {
  border-color: var(--border-strong);
}

.category-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease;
}

.category-summary::-webkit-details-marker {
  display: none;
}

.category-summary:hover {
  background: var(--bg-subtle);
}

.category-summary-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.status-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.status-pass {
  background: var(--pass-bg);
  color: var(--pass-color);
  border: 1px solid var(--pass-border);
}

.status-warn {
  background: var(--warn-bg);
  color: var(--warn-color);
  border: 1px solid var(--warn-border);
}

.status-fail {
  background: var(--fail-bg);
  color: var(--fail-color);
  border: 1px solid var(--fail-border);
}

.status-info {
  background: var(--info-bg);
  color: var(--info-color);
  border: 1px solid var(--info-border);
}

.category-title {
  display: block;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text-main);
}

.category-subtitle {
  display: block;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.category-summary-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.category-chevron::after {
  content: "▾";
  display: inline-block;
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.category-details[open] .category-chevron::after {
  transform: rotate(180deg);
}

.category-body {
  border-top: 1px solid var(--border-color);
  padding: 18px 20px;
  background: #fcfdff;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.subcheck-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left-width: 4px;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.subcheck-card.border-pass {
  border-left-color: var(--pass-color);
}

.subcheck-card.border-warn {
  border-left-color: var(--warn-color);
}

.subcheck-card.border-fail {
  border-left-color: var(--fail-color);
}

.subcheck-card.border-info {
  border-left-color: var(--info-color);
}

.subcheck-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.subcheck-title {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 700;
}

.subcheck-delta {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
}

.subcheck-desc {
  margin: 0 0 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.code-block {
  margin: 8px 0 0 0;
  padding: 12px 14px;
  background: var(--bg-code);
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.81rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.recommendation-box {
  margin-top: 10px;
  padding: 10px 12px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #92400e;
}

.recommendation-box strong {
  display: block;
  margin-bottom: 2px;
}

/* Inspector Card */
.inspector-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.inspector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
}

.inspector-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.html-iframe {
  width: 100%;
  min-height: 360px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

.header-search-bar {
  margin-bottom: 12px;
}

.headers-table-wrap {
  max-height: 440px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.headers-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.headers-table th,
.headers-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  vertical-align: top;
}

.headers-table th {
  background: var(--bg-subtle);
  font-weight: 700;
  position: sticky;
  top: 0;
}

.headers-table td:first-child {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
  width: 220px;
}

.headers-table td:last-child {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  word-break: break-all;
}

.mime-parts-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

/* Native <dialog> Modal */
.sim-dialog {
  width: min(860px, 94vw);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.35);
  background: var(--bg-card);
  color: var(--text-main);
}

.sim-dialog::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(3px);
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.dialog-header h2 {
  margin: 0 0 4px 0;
  font-size: 1.2rem;
}

.dialog-subtitle {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  font-size: 1rem;
}

.dialog-body {
  padding: 20px 24px;
}

.sim-presets-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 10px 12px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 600;
}

.sim-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-checkbox-group {
  justify-content: flex-end;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 0;
}

.form-input,
.form-textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--text-main);
}

.dialog-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
  padding: 18px 0;
  font-size: 0.84rem;
  color: var(--text-muted);
  text-align: center;
}