:root {
  --press-ink: #1A1814;
  --type-metal: #4A4843;
  --ink-faint: #8A847A;
  --brass: #A89B7E;
  --iron-oxide: #B55537;
  --cartridge: #F2EDE0;
  --bleached: #FFFCF5;
  --vellum: #E8E1CE;
  --rule: #E0DACC;
  --rule-soft: #EDE7D7;
  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--cartridge);
  color: var(--press-ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.65;
  margin: 0;
  padding: 0;
}
a { color: var(--press-ink); text-decoration: none; border-bottom: 1px solid var(--rule); transition: border-color 0.12s ease, color 0.12s ease; }
a:hover { border-bottom-color: var(--iron-oxide); color: var(--iron-oxide); }

/* Top bar */
.topbar {
  background: var(--press-ink);
  color: var(--cartridge);
  padding: 14px 32px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 3px solid var(--iron-oxide);
}
.topbar a { color: var(--cartridge); border: none; }
.topbar a:hover { color: var(--brass); }
.topbar-brand { font-weight: 600; letter-spacing: 0.14em; }
.topbar-meta { color: var(--brass); font-size: 0.7rem; }

/* Breadcrumb */
.breadcrumb {
  background: var(--bleached);
  border-bottom: 1px solid var(--rule);
  padding: 12px 32px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}
.breadcrumb a { color: var(--type-metal); border: none; }
.breadcrumb a:hover { color: var(--iron-oxide); }
.breadcrumb .sep { color: var(--brass); margin: 0 8px; }
.breadcrumb .current { color: var(--press-ink); }

/* Main page wrapper */
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 32px 96px;
}

/* Landing page */
.landing-header {
  border-bottom: 1px solid var(--press-ink);
  padding-bottom: 32px;
  margin-bottom: 48px;
}
.landing-kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--iron-oxide);
  margin-bottom: 12px;
}
.landing-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 2.6rem;
  line-height: 1.15;
  margin: 0 0 18px 0;
  letter-spacing: -0.01em;
}
.landing-lede {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--type-metal);
  margin: 0;
  max-width: 640px;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}
.section-card {
  background: var(--bleached);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--brass);
  border-radius: 4px;
  padding: 22px 24px 20px;
  transition: border-left-color 0.15s ease, background 0.15s ease;
  display: block;
  border-bottom: 1px solid var(--rule);
}
.section-card:hover { border-left-color: var(--iron-oxide); background: #fff; }
.section-card a { border: none; }
.section-name {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.22rem;
  color: var(--press-ink);
  margin: 0 0 6px 0;
  letter-spacing: -0.005em;
}
.section-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--iron-oxide);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.section-desc {
  font-size: 0.93rem;
  color: var(--type-metal);
  line-height: 1.5;
  margin: 0;
}

/* Section landing (folder view) */
.folder-header {
  border-bottom: 1px solid var(--press-ink);
  padding-bottom: 28px;
  margin-bottom: 36px;
}
.folder-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--iron-oxide);
  margin-bottom: 10px;
}
.folder-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 2.1rem;
  line-height: 1.2;
  margin: 0 0 14px 0;
  letter-spacing: -0.005em;
}
.folder-desc {
  font-size: 1.02rem;
  color: var(--type-metal);
  margin: 0;
  max-width: 640px;
}

/* Sort controls */
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}
.controls-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
.sort-group { display: flex; gap: 2px; }
.sort-btn {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--type-metal);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.12s ease;
  text-transform: uppercase;
}
.sort-btn:hover { color: var(--iron-oxide); border-color: var(--iron-oxide); }
.sort-btn.active { background: var(--press-ink); color: var(--cartridge); border-color: var(--press-ink); }
.sort-btn:first-child { border-radius: 3px 0 0 3px; }
.sort-btn:last-child { border-radius: 0 3px 3px 0; border-left: none; }

/* Document list */
.doc-list { display: flex; flex-direction: column; gap: 0; }
.doc-row {
  display: grid;
  grid-template-columns: 1fr 100px 80px 80px;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--rule-soft);
  align-items: center;
  transition: background 0.1s ease;
  text-decoration: none;
  border-left: 3px solid transparent;
}
.doc-row:hover { background: var(--bleached); border-left-color: var(--iron-oxide); }
.doc-row.archived { opacity: 0.62; }
.doc-row.archived:hover { opacity: 0.88; }

.doc-name {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  color: var(--press-ink);
  font-weight: 500;
  line-height: 1.35;
}
.doc-filename {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-faint);
  margin-top: 3px;
  word-break: break-all;
}
.doc-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--iron-oxide);
  letter-spacing: 0.04em;
}
.doc-ext {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--type-metal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--vellum);
  padding: 2px 8px;
  border-radius: 2px;
  text-align: center;
  display: inline-block;
}
.doc-status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: right;
}
.doc-status.current { color: var(--iron-oxide); font-weight: 500; }
.doc-status.archived { color: var(--ink-faint); }

/* Subfolder list (for sections with subfolders like phases/, protocols/) */
.subfolder-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 36px;
}
.subfolder-card {
  background: var(--bleached);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--brass);
  border-radius: 4px;
  padding: 16px 20px;
  transition: all 0.12s ease;
  display: block;
  border-bottom: 1px solid var(--rule);
}
.subfolder-card:hover { border-left-color: var(--iron-oxide); background: #fff; }
.subfolder-card a { border: none; }
.subfolder-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--press-ink);
  margin: 0 0 4px 0;
}
.subfolder-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Section divider for subfolder vs document mixed views */
.section-divider {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--iron-oxide);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

/* Document viewer */
.viewer-frame {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 4px;
  min-height: 80vh;
  background: white;
}
.viewer-meta {
  background: var(--vellum);
  border-left: 3px solid var(--iron-oxide);
  padding: 14px 22px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--type-metal);
  border-radius: 0 4px 4px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.viewer-meta-label {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--iron-oxide);
  margin-right: 8px;
}
.viewer-meta-left { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.viewer-meta-actions { display: flex; gap: 10px; align-items: center; }

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--type-metal);
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
  transition: color 0.12s ease, border-color 0.12s ease;
  background: transparent;
  border-left: none;
  border-right: none;
  border-top: none;
  cursor: pointer;
  font-weight: 400;
}
.back-link:hover { color: var(--iron-oxide); border-bottom-color: var(--iron-oxide); }
.back-arrow {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1;
}

/* Folder header with back link */
.folder-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 14px;
}
.folder-header-row .back-link { margin-top: 4px; flex-shrink: 0; }
.edit-btn {
  background: var(--press-ink);
  color: var(--cartridge);
  border: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  padding: 7px 16px;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  border-bottom: none;
  border-radius: 3px;
  transition: background 0.1s ease;
}
.edit-btn:hover { background: var(--iron-oxide); color: var(--cartridge); }
.edit-btn.disabled { background: var(--ink-faint); cursor: not-allowed; opacity: 0.6; }

/* Markdown viewer styling */
.md-content {
  background: var(--bleached);
  padding: 48px 56px;
  border: 1px solid var(--rule);
  border-radius: 4px;
}
.md-content h1, .md-content h2, .md-content h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--press-ink);
  letter-spacing: -0.005em;
}
.md-content h1 { font-size: 2rem; margin: 0 0 18px 0; padding-bottom: 12px; border-bottom: 1px solid var(--press-ink); }
.md-content h2 { font-size: 1.5rem; margin: 36px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
.md-content h3 { font-size: 1.18rem; margin: 28px 0 10px; }
.md-content p { color: var(--type-metal); margin: 0 0 14px 0; }
.md-content code { font-family: var(--font-mono); font-size: 0.86em; background: var(--vellum); padding: 1px 6px; border-radius: 2px; color: var(--press-ink); }
.md-content pre { background: var(--press-ink); color: var(--cartridge); padding: 18px 22px; border-radius: 4px; overflow-x: auto; font-family: var(--font-mono); font-size: 0.85rem; line-height: 1.55; }
.md-content pre code { background: transparent; color: inherit; padding: 0; }
.md-content ul, .md-content ol { padding-left: 24px; }
.md-content li { color: var(--type-metal); margin-bottom: 6px; }
.md-content strong { color: var(--press-ink); }
.md-content table { width: 100%; border-collapse: collapse; margin: 16px 0; background: white; border: 1px solid var(--rule); }
.md-content th { text-align: left; padding: 10px 14px; font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; background: var(--vellum); border-bottom: 1px solid var(--rule); }
.md-content td { padding: 10px 14px; border-bottom: 1px solid var(--rule-soft); }
.md-content hr { border: none; border-top: 1px solid var(--rule); margin: 28px 0; }
.md-content blockquote { border-left: 3px solid var(--brass); padding: 4px 18px; margin: 12px 0; color: var(--type-metal); font-style: italic; }

.unsupported {
  background: var(--vellum);
  border-left: 3px solid var(--brass);
  padding: 24px 28px;
  border-radius: 0 4px 4px 0;
}
.unsupported h3 { margin: 0 0 10px 0; font-family: var(--font-serif); font-weight: 500; }
.unsupported p { color: var(--type-metal); margin: 0 0 8px; }
.unsupported a { font-family: var(--font-mono); font-size: 0.85rem; }

/* HTML document open-in-new-tab block */
.open-html {
  background: var(--bleached);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--iron-oxide);
  border-radius: 0 4px 4px 0;
  padding: 36px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40vh;
}
.open-html-message { text-align: center; max-width: 480px; }
.open-html-message h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.5rem;
  margin: 0 0 12px 0;
  color: var(--press-ink);
}
.open-html-message p {
  color: var(--type-metal);
  margin: 0 0 24px 0;
  font-size: 1rem;
}
.open-html-btn {
  display: inline-block;
  background: var(--press-ink);
  color: var(--cartridge);
  border: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  padding: 12px 28px;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: none;
  border-radius: 3px;
  transition: background 0.12s ease;
}
.open-html-btn:hover { background: var(--iron-oxide); color: var(--cartridge); border-bottom: none; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--press-ink);
  padding: 28px 32px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  margin-top: 56px;
  background: var(--bleached);
}
.site-footer p { margin: 0 0 4px 0; }

.prototype-badge {
  display: inline-block;
  background: var(--iron-oxide);
  color: var(--cartridge);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 2px;
  margin-left: 12px;
  font-weight: 500;
}

@media (max-width: 720px) {
  .page { padding: 36px 20px 60px; }
  .topbar { padding: 12px 20px; flex-wrap: wrap; gap: 8px; }
  .breadcrumb { padding: 10px 20px; }
  .landing-title { font-size: 1.9rem; }
  .folder-title { font-size: 1.6rem; }
  .doc-row { grid-template-columns: 1fr 70px; row-gap: 6px; }
  .doc-row .doc-version, .doc-row .doc-status { display: none; }
  .section-grid { grid-template-columns: 1fr; }
  .subfolder-list { grid-template-columns: 1fr; }
  .md-content { padding: 28px 24px; }
}

/* ---- Phase 62: editor surface ---- */

.folder-header-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.new-doc-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--press-ink);
  color: var(--cartridge);
  border: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 3px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.12s ease;
}
.new-doc-btn:hover { background: var(--iron-oxide); color: var(--cartridge); }

button.edit-btn { cursor: pointer; border: none; }
button.edit-btn:not(.disabled):hover { background: var(--iron-oxide); }

.editor-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 24, 20, 0.55);
  z-index: 1000;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 32px;
}
.editor-modal {
  background: var(--cartridge);
  width: 100%;
  max-width: 1100px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 12px 48px rgba(0,0,0,0.3);
  overflow: hidden;
}
.editor-modal-header {
  background: var(--press-ink);
  color: var(--cartridge);
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 3px solid var(--iron-oxide);
}
.editor-modal-title {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.editor-modal-close {
  background: transparent;
  border: none;
  color: var(--cartridge);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}
.editor-modal-close:hover { color: var(--iron-oxide); }
.editor-modal-body {
  flex: 1;
  background: var(--bleached);
  overflow: hidden;
  display: flex;
}
.editor-monaco-host { flex: 1; min-height: 60vh; }
.editor-modal-footer {
  background: var(--vellum);
  padding: 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--rule);
  flex-wrap: wrap;
}
.editor-modal-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--type-metal);
  flex: 1;
}
.editor-modal-status.status-ready { color: var(--iron-oxide); }
.editor-modal-status.status-success { color: #2D5016; }
.editor-modal-status.status-error { color: #B55537; }
.editor-modal-actions { display: flex; gap: 10px; }
.editor-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 9px 18px;
  border-radius: 3px;
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: all 0.12s ease;
}
.editor-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.editor-btn-primary {
  background: var(--press-ink);
  color: var(--cartridge);
  border-color: var(--press-ink);
}
.editor-btn-primary:hover:not(:disabled) { background: var(--iron-oxide); border-color: var(--iron-oxide); }
.editor-btn-secondary {
  background: var(--bleached);
  color: var(--press-ink);
}
.editor-btn-secondary:hover:not(:disabled) { border-color: var(--iron-oxide); color: var(--iron-oxide); }

.editor-picker { padding: 28px 32px; width: 100%; }
.editor-picker-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--iron-oxide);
  margin: 12px 0 6px;
}
.editor-picker-select, .editor-picker-input {
  width: 100%;
  padding: 9px 12px;
  font-family: var(--font-serif);
  font-size: 1rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: white;
  color: var(--press-ink);
}
.editor-picker-hint { margin-top: 18px; font-size: 0.92rem; color: var(--type-metal); }
.editor-picker-preview {
  background: var(--vellum);
  padding: 2px 8px;
  border-radius: 2px;
  font-family: var(--font-mono);
}