:root {
  --bg: #f7f9fc;
  --surface: #f7f9fc;
  --surface-lowest: #ffffff;
  --surface-low: #f0f4f8;
  --surface-container: #e8edf4;
  --surface-high: #dde5ef;
  --line: rgba(117, 135, 156, 0.22);
  --line-strong: rgba(117, 135, 156, 0.34);
  --text: #11181f;
  --text-muted: #5f6b7a;
  --primary: #1d5d92;
  --primary-strong: #174a73;
  --primary-container: #dce8f4;
  --secondary-container: #d8e3ef;
  --tertiary: #2f7a63;
  --error: #b3261e;
  --error-container: #f9dedc;
  --shadow-soft: 0 18px 40px rgba(17, 24, 31, 0.06);
  --shadow-mid: 0 10px 24px rgba(17, 24, 31, 0.05);
  --radius-xl: 28px;
  --radius-lg: 24px;
  --radius-md: 20px;
  --radius-sm: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(29, 93, 146, 0.08), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 18%, var(--bg) 100%);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', sans-serif;
}

body {
  padding: 18px;
}

.app-shell {
  display: grid;
  grid-template-columns: 336px minmax(0, 1fr);
  gap: 18px;
  min-height: calc(100vh - 36px);
}

.sidebar,
.topbar,
.hero-panel,
.doc-frame {
  background: var(--surface-lowest);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
  border-radius: 32px;
  overflow: hidden;
}

.brand-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 18px;
  background: linear-gradient(180deg, var(--primary-container), rgba(255, 255, 255, 0.92));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(29, 93, 146, 0.14);
}

.brand-logo {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.88);
  padding: 14px;
  box-shadow: inset 0 0 0 1px rgba(29, 93, 146, 0.08);
}

.brand-overline,
.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-card h1,
.topbar h2,
.hero-copy h3,
.empty-state h3,
.dashboard-section-header h3,
.panel-header h4,
.feature-summary-card h5,
.saved-feature-card h5 {
  margin: 0;
}

.brand-card h1 {
  font-size: 28px;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-copy p,
.empty-state p,
.decision-card p,
.feature-summary-card p,
.saved-feature-summary,
.saved-feature-date,
.support-summary,
.support-date {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.58;
}

.search-shell {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 0 16px;
  background: var(--surface-low);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.search-shell span {
  color: var(--text-muted);
}

.search-shell input {
  width: 100%;
  border: 0;
  background: transparent;
  outline: 0;
  font: inherit;
  color: var(--text);
}

.nav-groups {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-right: 6px;
  overflow: auto;
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-section-heading {
  margin: 0;
  padding-left: 4px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-group-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 42px;
  padding: 0 12px;
  background: var(--surface-low);
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.nav-group-label-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-group-label {
  font-size: 13px;
}

.nav-group-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--surface-container);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
}

.nav-group-icon {
  transition: transform 140ms ease;
}

.nav-group.collapsed .nav-group-icon {
  transform: rotate(-90deg);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-group.collapsed .nav-list {
  display: none;
}

.nav-item {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 14px 15px;
  border-radius: 22px;
  text-align: left;
  cursor: pointer;
  transition: background 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.nav-item:hover {
  background: rgba(29, 93, 146, 0.06);
}

.nav-item.active {
  background: var(--secondary-container);
  box-shadow: inset 0 0 0 1px rgba(29, 93, 146, 0.08);
}

.nav-item-title {
  display: block;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.nav-item-description {
  display: block;
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.42;
}

.content-shell {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  gap: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-radius: 32px;
}

.topbar-copy {
  flex: 1;
}

.topbar h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.status-pill,
.meta-chip,
.support-severity,
.support-priority,
.support-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-pill,
.meta-chip {
  background: var(--surface-low);
  border: 1px solid var(--line);
  color: var(--text-muted);
}

.status-pill span:first-child,
.meta-chip span:first-child {
  color: var(--primary);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(290px, 0.85fr);
  gap: 18px;
  padding: 24px;
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(220, 232, 244, 0.92), rgba(255, 255, 255, 0.96));
}

.hero-copy h3 {
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.hero-honeycomb,
.feature-lab-metrics,
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-honeycomb {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: center;
}

.honeycomb-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 130px;
  padding: 22px 18px;
  background: var(--surface-lowest);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-mid);
  clip-path: polygon(25% 6%, 75% 6%, 100% 50%, 75% 94%, 25% 94%, 0 50%);
}

.honeycomb-large {
  min-height: 154px;
}

.honeycomb-wide {
  grid-column: span 2;
}

.honeycomb-cell strong {
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.metric-card,
.dashboard-card,
.decision-card,
.feature-summary-card,
.saved-feature-card,
.support-case-card {
  background: var(--surface-lowest);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-mid);
}

.metric-card,
.dashboard-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 118px;
  padding: 18px;
  border-radius: 24px;
}

.metric-card.compact {
  min-height: 96px;
}

.metric-label,
.dashboard-label,
.decision-label,
.feature-card-label {
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metric-card strong,
.dashboard-card strong {
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.content-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 6px;
}

.meta-chip.subtle {
  background: rgba(240, 244, 248, 0.92);
}

.doc-frame {
  border-radius: 32px;
  overflow: auto;
  padding: 28px;
}

.empty-state {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
}

.empty-state .material-symbols-rounded {
  font-size: 52px;
  color: var(--primary);
}

.markdown-body {
  max-width: 920px;
  margin: 0 auto;
  color: var(--text);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 1.7em;
  margin-bottom: 0.55em;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.markdown-body h1 {
  margin-top: 0;
  font-size: clamp(34px, 4vw, 48px);
}

.markdown-body h2 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 28px;
}

.markdown-body h3 {
  font-size: 22px;
}

.markdown-body p,
.markdown-body li {
  color: #2d3742;
  font-size: 16px;
  line-height: 1.72;
}

.markdown-body a {
  color: var(--primary);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body code {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-container);
  color: var(--primary-strong);
  font-size: 0.92em;
}

.markdown-body pre,
.feature-preview {
  overflow: auto;
  padding: 18px;
  border-radius: 22px;
  background: #122232;
  color: #eef4fb;
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.markdown-body blockquote {
  margin: 20px 0;
  padding: 0 18px;
  border-left: 4px solid rgba(29, 93, 146, 0.28);
  color: var(--text-muted);
}

.markdown-body table {
  width: 100%;
  margin: 20px 0;
  border-collapse: collapse;
  background: var(--surface-lowest);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-mid);
}

.markdown-body th,
.markdown-body td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.markdown-body th {
  background: var(--surface-low);
  font-weight: 700;
}

.icon-button {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 16px;
  background: var(--surface-low);
  color: var(--text);
}

.mobile-only {
  display: none;
}

.dashboard-shell,
.feature-lab-shell,
.feature-lab-grid,
.feature-lab-form,
.feature-lab-actions,
.feature-card-grid,
.saved-feature-grid,
.decision-strip,
.saved-feature-actions {
  display: grid;
  gap: 16px;
}

.dashboard-shell,
.feature-lab-shell {
  gap: 22px;
}

.dashboard-section,
.feature-lab-hero,
.feature-lab-panel,
.feature-lab-subpanel {
  background: var(--surface-low);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 22px;
}

.dashboard-section {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.dashboard-section-header,
.panel-header,
.saved-feature-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.dashboard-section-header {
  margin-bottom: 18px;
}

.dashboard-section-header h3 {
  font-size: 28px;
  letter-spacing: -0.04em;
}

.dashboard-empty {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-radius: 24px;
  background: var(--surface-high);
  color: var(--text-muted);
}

.support-case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.support-case-card {
  padding: 18px;
  border-radius: 24px;
}

.support-case-card h4 {
  margin: 12px 0 8px;
  font-size: 20px;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.support-case-top,
.support-meta-row,
.support-flags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.support-severity,
.support-flag.danger,
.secondary-action.danger {
  background: rgba(179, 38, 30, 0.08);
  color: var(--error);
}

.support-priority,
.support-flag.info {
  background: rgba(29, 93, 146, 0.08);
  color: var(--primary-strong);
}

.support-flag.neutral {
  background: rgba(95, 107, 122, 0.12);
  color: var(--text-muted);
}

.feature-lab-hero {
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  background: linear-gradient(135deg, rgba(220, 232, 244, 0.82), rgba(255, 255, 255, 0.94));
}

.feature-lab-copy {
  margin: 10px 0 0;
  max-width: 72ch;
}

.feature-lab-grid {
  grid-template-columns: minmax(380px, 0.95fr) minmax(0, 1.05fr);
}

.feature-lab-form {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-field {
  display: grid;
  gap: 8px;
}

.feature-field span {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.feature-field input,
.feature-field textarea,
.feature-field select {
  width: 100%;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-lowest);
  color: var(--text);
  font: inherit;
  outline: none;
  resize: vertical;
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

.feature-field textarea {
  min-height: 116px;
}

.feature-field input:focus,
.feature-field textarea:focus,
.feature-field select:focus {
  border-color: rgba(29, 93, 146, 0.34);
  box-shadow: 0 0 0 4px rgba(29, 93, 146, 0.10);
}

.feature-field:nth-child(2),
.feature-field:nth-child(3),
.feature-field:nth-child(6),
.feature-field:nth-child(7),
.feature-field:nth-child(8),
.feature-field:nth-child(9),
.feature-field:nth-child(10),
.feature-field:nth-child(11),
.feature-field:nth-child(12),
.feature-field:nth-child(13),
.feature-field:nth-child(14),
.feature-field:nth-child(15) {
  grid-column: 1 / -1;
}

.feature-lab-actions {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  border-radius: 20px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.primary-action {
  background: linear-gradient(180deg, var(--primary), var(--primary-strong));
  color: #fff;
  box-shadow: 0 12px 26px rgba(29, 93, 146, 0.22);
}

.secondary-action {
  background: var(--surface-lowest);
  border-color: var(--line);
  color: var(--text);
}

.secondary-action.compact {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 16px;
}

.primary-action:hover,
.secondary-action:hover,
.nav-item:hover {
  transform: translateY(-1px);
}

.decision-strip,
.feature-card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.decision-card,
.feature-summary-card,
.saved-feature-card {
  border-radius: 24px;
  padding: 18px;
}

.decision-label,
.feature-card-label {
  margin-bottom: 8px;
  color: var(--primary);
}

.decision-card strong,
.feature-summary-card h5,
.saved-feature-card h5 {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.feature-preview {
  margin: 0;
  font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace;
  font-size: 13px;
  line-height: 1.62;
}

.saved-feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.saved-feature-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

@media (max-width: 980px) {
  .dashboard-grid,
  .support-case-grid,
  .feature-lab-metrics,
  .feature-card-grid,
  .saved-feature-grid,
  .decision-strip,
  .feature-lab-actions {
    grid-template-columns: 1fr;
  }

  .hero-honeycomb {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .honeycomb-wide {
    grid-column: span 2;
  }
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 18px;
    left: 18px;
    bottom: 18px;
    width: min(360px, calc(100vw - 36px));
    z-index: 20;
    transform: translateX(-110%);
    transition: transform 180ms ease;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-only {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero-panel,
  .feature-lab-hero,
  .feature-lab-grid,
  .feature-lab-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    padding: 12px;
  }

  .topbar,
  .hero-panel,
  .doc-frame,
  .feature-lab-hero,
  .feature-lab-panel,
  .feature-lab-subpanel,
  .dashboard-section {
    padding: 18px;
  }

  .markdown-body h1 {
    font-size: 34px;
  }

  .hero-honeycomb {
    grid-template-columns: 1fr;
  }

  .honeycomb-wide {
    grid-column: auto;
  }

  .honeycomb-cell {
    clip-path: none;
    border-radius: 24px;
    min-height: 0;
  }
}