:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --muted: #5b5b5b;
  --border: #e3e3e0;
  --accent: #1f4f8b;
  --accent-ink: #ffffff;
  --warn-bg: #fff8e1;
  --warn-ink: #604a00;
  --status-bg: #eaf2fb;
  --status-ink: #1f4f8b;
  --sev-critical-bg: #fde2e2;
  --sev-critical-ink: #842029;
  --sev-high-bg: #ffe8d4;
  --sev-high-ink: #8a4b16;
  --sev-medium-bg: #fff3cd;
  --sev-medium-ink: #6a5200;
  --sev-low-bg: #d9ecff;
  --sev-low-ink: #1f4f8b;
  --sev-info-bg: #ececec;
  --sev-info-ink: #444;
  --proposed-bg: #ecf6ec;
  --proposed-ink: #1f5e2b;
  --original-bg: #fdecec;
  --original-ink: #842029;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.topbar-nav {
  margin-left: auto;
  display: flex;
  gap: 1.25rem;
}

.topbar-nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.topbar-nav a:hover {
  text-decoration: underline;
}

.brand {
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.01em;
  color: #c92a2a;
}

.tagline {
  color: var(--muted);
  font-size: 0.9rem;
}

.container {
  max-width: 720px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.upload-card,
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
}

h2 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
}

.lead {
  color: var(--muted);
  margin-top: 0;
}

.status-banner {
  background: var(--status-bg);
  color: var(--status-ink);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  margin: 1rem 0 1.5rem;
}

.upload-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.file-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border: 1.5px dashed var(--border);
  padding: 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  background: #fafafa;
}

.file-label:hover {
  border-color: var(--accent);
}

.file-label-title {
  font-weight: 600;
}

.file-label-hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.file-label input[type="file"] {
  margin-top: 0.5rem;
}

button.primary,
a.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 6px;
  padding: 0.65rem 1.1rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button.primary:hover,
a.primary:hover {
  filter: brightness(0.92);
}

.stats {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1rem;
  row-gap: 0.4rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.stats dt {
  color: var(--muted);
}

.stats dd {
  margin: 0;
  font-weight: 600;
  word-break: break-word;
}

.preview-note {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0.5rem 0 0.75rem;
}

.preview {
  list-style: none;
  margin: 0;
  padding: 0;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--ink);
}

.preview li {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
}

.preview li:last-child {
  border-bottom: none;
}

.preview-meta {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.preview-text {
  word-break: break-word;
}

.summary {
  margin: 0.5rem 0 1rem;
  font-size: 1rem;
  line-height: 1.55;
}

.suggestion-count {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  margin-left: 0.5rem;
}

.suggestions {
  list-style: none;
  margin: 1rem 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.suggestion {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 6px;
  padding: 1rem 1rem 0.75rem;
  background: #fcfcfb;
}

.suggestion.severity-critical {
  border-left-color: var(--sev-critical-ink);
}

.suggestion.severity-high {
  border-left-color: var(--sev-high-ink);
}

.suggestion.severity-medium {
  border-left-color: var(--sev-medium-ink);
}

.suggestion.severity-low {
  border-left-color: var(--sev-low-ink);
}

.suggestion.severity-info {
  border-left-color: var(--sev-info-ink);
}

.suggestion-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
}

.severity-badge,
.action-badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.7rem;
}

.severity-badge.severity-critical {
  background: var(--sev-critical-bg);
  color: var(--sev-critical-ink);
}

.severity-badge.severity-high {
  background: var(--sev-high-bg);
  color: var(--sev-high-ink);
}

.severity-badge.severity-medium {
  background: var(--sev-medium-bg);
  color: var(--sev-medium-ink);
}

.severity-badge.severity-low {
  background: var(--sev-low-bg);
  color: var(--sev-low-ink);
}

.severity-badge.severity-info {
  background: var(--sev-info-bg);
  color: var(--sev-info-ink);
}

.action-badge {
  background: var(--status-bg);
  color: var(--status-ink);
}

.anchor {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--ink);
}

.rule-ref {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  margin-left: auto;
}

.text-block {
  margin: 0.45rem 0;
}

.text-block-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.text-block-content {
  border-radius: 4px;
  padding: 0.55rem 0.75rem;
  font-size: 0.92rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.text-original {
  background: var(--original-bg);
  color: var(--original-ink);
}

.text-proposed {
  background: var(--proposed-bg);
  color: var(--proposed-ink);
}

.rationale {
  background: #fafafa;
  border: 1px solid var(--border);
  color: var(--ink);
}

.empty-state {
  color: var(--muted);
  font-style: italic;
}

.interstitial {
  margin-top: 1rem;
}

.interstitial-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2.25rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  text-align: center;
}

.interstitial-card h2 {
  margin: 1.1rem 0 0.4rem;
  font-size: 1.35rem;
}

.interstitial-filename {
  color: var(--muted);
  margin: 0 0 1.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92rem;
  word-break: break-all;
}

.interstitial-stage {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0.5rem 0 0.5rem;
  color: var(--accent);
  min-height: 1.5em;
}

.interstitial-elapsed-row {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.interstitial-warning {
  background: var(--sev-critical-bg);
  color: var(--sev-critical-ink);
  border-left: 4px solid var(--sev-critical-ink);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  text-align: left;
  font-size: 0.92rem;
  line-height: 1.5;
  margin: 0.5rem auto 1rem;
  max-width: 32rem;
}

.interstitial-warning strong {
  display: block;
  margin-bottom: 0.15rem;
}

.interstitial-hint {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0.5rem 0 0;
  line-height: 1.5;
}

.spinner {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  margin: 0 auto;
  animation: spin 0.9s linear infinite;
}

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

.error-card {
  background: var(--surface);
  border: 1px solid var(--sev-critical-ink);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 1.75rem;
}

.error-card h2 {
  margin: 0 0 0.5rem;
  color: var(--sev-critical-ink);
}

.error-detail {
  background: var(--sev-critical-bg);
  color: var(--sev-critical-ink);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border-top-color: var(--border);
    background: var(--accent);
  }
}

.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem 2rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  margin-bottom: 1.5rem;
}

.admin-card code {
  background: var(--bg);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.92rem;
}

.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.03);
}

.section-card.section-level-1 {
  border-left: 4px solid var(--accent);
}

.section-card.section-level-2 {
  border-left: 4px solid var(--accent);
  border-left-color: rgba(31, 79, 139, 0.7);
}

.section-card.section-level-3 {
  margin-left: 1.5rem;
  border-left: 4px solid rgba(31, 79, 139, 0.4);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.section-level-badge {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  padding: 0.15rem 0.45rem;
  background: var(--bg);
  border-radius: 4px;
}

.section-heading {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.section-textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  resize: vertical;
  background: #fafafa;
  line-height: 1.5;
  color: var(--ink);
}

.section-textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  background: var(--surface);
}

.section-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 0.6rem;
}

.section-status {
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1em;
}

.section-status.status-pending {
  color: var(--accent);
}

.section-status.status-success {
  color: var(--proposed-ink);
  font-weight: 600;
}

.section-status.status-error {
  color: var(--sev-critical-ink);
  font-weight: 600;
}

.clause-card,
.meta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.03);
}

.clause-card-header {
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.clause-name {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.meta-card.meta-level-3 {
  margin-left: 1.5rem;
  border-left-color: rgba(31, 79, 139, 0.4);
}

.clause-field {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--border);
}

.clause-field:first-of-type {
  border-top: none;
  padding-top: 0;
}

.clause-field-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.clause-field-input,
.meta-field-input {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  resize: vertical;
  background: #fafafa;
  line-height: 1.5;
  color: var(--ink);
}

.clause-field-input:focus,
.meta-field-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  background: var(--surface);
}

.clause-field-actions,
.meta-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.config-example {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  margin: 0.75rem 0;
  white-space: pre-wrap;
}

/* ---------- Admin tabs ---------- */

.admin-tabs {
  display: flex;
  gap: 0.5rem;
  margin: 1rem -2rem -2rem;
  padding: 0 2rem;
  border-bottom: 1px solid var(--border);
}

.admin-tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 0.6rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  margin-bottom: -1px;
}

.admin-tab:hover {
  color: var(--ink);
}

.admin-tab.is-active {
  background: var(--surface);
  border-color: var(--border);
  border-bottom-color: var(--surface);
  color: var(--accent);
}

.admin-tab-pane {
  margin-top: 1rem;
}

.admin-tab-pane:not(.is-active) {
  display: none;
}

/* ---------- Acronym editor ---------- */

.acronym-add-card h3,
.admin-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.acronym-grid {
  display: grid;
  grid-template-columns: 1fr 2fr 2fr auto;
  gap: 0.75rem;
  align-items: center;
}

.acronym-grid-header {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

.acronym-row {
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

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

.acronym-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 0.5rem;
}

.acronym-add-row {
  align-items: end;
}

.acronym-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.acronym-input {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.4rem 0.55rem;
  background: #fafafa;
}

.acronym-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  background: var(--surface);
}

.acronym-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

button.danger {
  background: var(--sev-critical-ink);
  color: var(--accent-ink);
  border: none;
  border-radius: 6px;
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

button.danger:hover {
  filter: brightness(0.92);
}

/* ---------- Changelog tab ---------- */

.changelog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 1.1rem 1.5rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.03);
}

.changelog-card-header {
  margin-bottom: 0.6rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.changelog-version {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.changelog-bullets {
  margin: 0;
  padding-left: 1.4rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

.changelog-bullets li {
  margin-bottom: 0.35rem;
}

.changelog-bullets li:last-child {
  margin-bottom: 0;
}

.download-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1rem 0 0.25rem;
  flex-wrap: wrap;
}

.download-button {
  font-size: 0.95rem;
}

.download-hint {
  color: var(--muted);
  font-size: 0.88rem;
  flex: 1 1 240px;
  line-height: 1.4;
}

.disclaimer {
  max-width: 720px;
  margin: 2rem auto 3rem;
  padding: 1rem 1.5rem;
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-radius: 8px;
  font-size: 0.88rem;
  line-height: 1.5;
}