/* ============================================================
   Zycus Contract Authoring Agent — styles.css
   ============================================================
   Design system: light mode, Inter font, flat cards, minimal
   motion. No build step, no frameworks. */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Tokens ------------------------------------------------- */
:root {
  --bg-base: #f6f7fb;
  --bg-surface: #ffffff;
  --bg-surface-raised: #f2f3f8;
  --bg-surface-hover: #eaecf4;

  --border-subtle: #e7e9f2;
  --border-default: #d9dce8;
  --border-strong: #b9bed1;

  --text-primary: #1a1d29;
  --text-secondary: #5b6072;
  --text-muted: #8b8fa3;

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-green: #15803d;
  --accent-yellow: #92400e;
  --accent-orange: #9a3412;
  --accent-red: #b91c1c;
  --accent-purple: #6d28d9;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-card: 0 1px 2px rgba(20,24,44,0.05), 0 1px 1px rgba(20,24,44,0.03);
  --shadow-dropdown: 0 8px 24px rgba(20,24,44,0.12);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* --- Reset & base -------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Layout -------------------------------------------------- */
.app-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline;
}
.app-header .subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: 0.75rem;
}
.btn-deck-link {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-blue);
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(37,99,235,0.25);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.btn-deck-link:hover {
  background: rgba(37,99,235,0.14);
  border-color: var(--accent-blue);
}

.app-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 0;
  min-height: calc(100vh - 48px);
}

/* --- Left Panel ---------------------------------------------- */
.left-panel {
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.left-panel h2 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

/* --- Form elements ------------------------------------------- */
.field-group { display: flex; flex-direction: column; gap: 0.25rem; }
.field-group label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.field-group input,
.field-group textarea,
.field-group select {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  transition: border-color var(--transition-fast);
  outline: none;
  width: 100%;
}
.field-group input:focus,
.field-group textarea:focus,
.field-group select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}
.field-group textarea { resize: vertical; min-height: 48px; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.35rem 0;
}
.checkbox-row input[type="checkbox"] {
  width: 15px; height: 15px;
  accent-color: var(--accent-orange);
  cursor: pointer;
}

.btn-generate {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: 0.5rem;
}
.btn-generate:hover:not(:disabled) {
  background: var(--accent-blue-hover);
}
.btn-generate:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-generate.loading {
  position: relative;
  color: transparent;
}
.btn-generate.loading::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 18px; height: 18px;
  margin: -9px 0 0 -9px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Main Panel ---------------------------------------------- */
.main-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* --- Banner -------------------------------------------------- */
.banner {
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.9rem;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

.banner.needs-review {
  background: #fef6e7;
  border-bottom: 1px solid #f3dfad;
  color: var(--accent-yellow);
}
.banner.blocked {
  background: #fdedec;
  border-bottom: 1px solid #f5c6c3;
  color: var(--accent-red);
}
.banner.ready {
  background: #ebf7f0;
  border-bottom: 1px solid #bfe3cd;
  color: var(--accent-green);
}

.banner-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-download {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.85rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}
.btn-download:hover:not(:disabled) {
  border-color: var(--accent-blue);
  background: var(--bg-surface-hover);
}
.btn-download:disabled { opacity: 0.4; cursor: not-allowed; }

.run-summary {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* --- Tabs ---------------------------------------------------- */
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 0 1.5rem;
  gap: 0;
}
.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.65rem 1rem;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

.tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
}
.tab-pane { display: none; animation: fadeIn 0.2s ease; }
.tab-pane.active { display: block; }

/* --- Review Cards -------------------------------------------- */
.review-section { margin-bottom: 1.5rem; }
.review-section-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  margin-bottom: 0.6rem;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast);
}
.review-card:hover { border-color: var(--border-strong); }

.review-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.review-card-header .field-name {
  font-weight: 600;
  font-size: 0.9rem;
}
.review-card-header .gate-badge {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(37,99,235,0.08);
  color: var(--accent-blue);
}

.review-card .reason {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.status-badge.needs-review { background: #fef6e7; color: var(--accent-yellow); }
.status-badge.blocked { background: #fdedec; color: var(--accent-red); }
.status-badge.auto-filled { background: #ebf7f0; color: var(--accent-green); }
.status-badge.assumption { background: #fbeee7; color: var(--accent-orange); }
.status-badge.not-applicable { background: var(--bg-surface-raised); color: var(--text-muted); }

/* Clause detail */
.clause-detail {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
}
.clause-detail dt {
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 0.35rem;
}
.clause-detail dd {
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.clause-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
.clause-actions button {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.7rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.clause-actions button:hover {
  border-color: var(--accent-blue);
  background: var(--bg-surface-hover);
}
.clause-actions button.active-action {
  border-color: var(--accent-green);
  background: #ebf7f0;
  color: var(--accent-green);
}

/* Warning banner for missing safeguards */
.warning-banner {
  background: #fef6e7;
  border: 1px solid #f3dfad;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.8rem;
  color: var(--accent-yellow);
  margin-top: 0.75rem;
  line-height: 1.45;
}

.edited-text-display {
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  color: var(--text-primary);
  margin-top: 0.35rem;
}

/* Inline Edit Panel */
.edit-clause-panel {
  margin-top: 0.75rem;
  padding: 0.85rem;
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  animation: fadeIn 0.2s ease;
}
.edit-clause-panel label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}
.edit-clause-textarea {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.6rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.82rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
}
.edit-clause-textarea:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}
.edit-clause-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
  justify-content: flex-end;
}
.btn-save-edit {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.btn-save-edit:hover {
  background: var(--accent-blue-hover);
}
.btn-cancel-edit {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  cursor: pointer;
}
.btn-cancel-edit:hover {
  color: var(--text-primary);
}

.source-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
}
.source-badge.library { background: #ebf7f0; color: var(--accent-green); }
.source-badge.ai-drafted { background: #f2ecfc; color: var(--accent-purple); }
.source-badge.none { background: var(--bg-surface-raised); color: var(--text-muted); }

.verification-badge {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
}
.verification-badge.verified { background: #ebf7f0; color: var(--accent-green); }
.verification-badge.unverified { background: #fef6e7; color: var(--accent-yellow); }

/* --- Draft Preview ------------------------------------------- */
.draft-preview {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  font-size: 0.88rem;
  line-height: 1.65;
  box-shadow: var(--shadow-card);
}
.draft-preview .preview-banner {
  color: var(--accent-red);
  font-weight: 700;
  padding: 0.5rem 0.75rem;
  background: #fdedec;
  border: 1px solid #f5c6c3;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}
.draft-preview .preview-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}
.draft-preview p { margin-bottom: 0.75rem; }
.draft-preview mark {
  color: inherit;
  background: transparent;
  text-decoration: none;
}
.draft-preview .highlight-yellow {
  background: #fef3c7;
  color: #78350f; /* dark amber text on light amber tint — high contrast on light bg */
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  border-bottom: 1.5px solid #f3ca5b;
  text-decoration: none;
  font-weight: 500;
}
.draft-preview .highlight-red {
  background: #fee2e2;
  color: #7f1d1d; /* dark red text on light red tint — high contrast on light bg */
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  border-bottom: 1.5px solid #f0a3a1;
  text-decoration: none;
  font-weight: 500;
}
.draft-preview .preview-note {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent-purple);
  background: #f2ecfc;
  border: 1px solid #d8c4f7;
  border-radius: 3px;
  padding: 0.05rem 0.35rem;
  margin-left: 0.35rem;
  cursor: help;
  vertical-align: middle;
  text-decoration: none;
}
.draft-preview .preview-note:hover {
  background: #e8dbfa;
  border-color: var(--accent-purple);
}

/* --- Agent Trace --------------------------------------------- */
/* Wide tables scroll within their own box, never the page body (D-71). */
.table-scroll {
  width: 100%;
  overflow-x: auto;
}

.trace-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.trace-table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border-default);
}
.trace-table td {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
}
.trace-table tr:hover td { background: var(--bg-surface-hover); }

.kind-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}
.kind-badge.agent { background: #f2ecfc; color: var(--accent-purple); }
.kind-badge.tool { background: rgba(37,99,235,0.08); color: var(--accent-blue); }
.kind-badge.rule { background: #fbeee7; color: var(--accent-orange); }
.kind-badge.render { background: #ebf7f0; color: var(--accent-green); }
.kind-badge.qa { background: var(--bg-surface-raised); color: var(--text-muted); }

.trace-detail {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}
.trace-tool-calls {
  margin-top: 0.25rem;
  padding-left: 0.75rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.trace-tools-details {
  margin-top: 0.35rem;
  font-size: 0.73rem;
  color: var(--text-muted);
}
.trace-tools-details summary {
  cursor: pointer;
  color: var(--accent-blue);
  user-select: none;
  font-weight: 500;
}
.trace-tools-details summary:hover {
  text-decoration: underline;
}
.trace-tools-expanded {
  margin-top: 0.35rem;
  padding: 0.4rem 0.5rem;
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.tc-item {
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 0.25rem;
}
.tc-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.tc-name {
  color: var(--text-primary);
  font-size: 0.73rem;
}
.tc-err {
  color: var(--accent-red);
  font-size: 0.68rem;
}
.tc-args, .tc-out {
  color: var(--text-secondary);
  font-size: 0.7rem;
  word-break: break-all;
}
.tc-args code, .tc-out code {
  font-family: 'SF Mono', monospace;
  font-size: 0.68rem;
}

.btn-trace-download {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  margin-bottom: 1rem;
  transition: all var(--transition-fast);
}
.btn-trace-download:hover { border-color: var(--accent-blue); }

/* --- Field Table --------------------------------------------- */
.field-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.field-table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border-default);
}
.field-table td {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border-subtle);
}
.field-table tr:hover td { background: var(--bg-surface-hover); }

/* --- Rules Tab ----------------------------------------------- */
.rules-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  white-space: pre-wrap;
  color: var(--text-secondary);
  max-height: 70vh;
  overflow-y: auto;
}

/* --- Footer -------------------------------------------------- */
.app-footer {
  padding: 0.75rem 1.5rem;
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
}

/* --- Empty / loading states ---------------------------------- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 2rem; margin-bottom: 0.75rem; }
.empty-state p { font-size: 0.85rem; }

.error-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: #dc2626;
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 500;
  box-shadow: var(--shadow-dropdown);
  z-index: 1000;
  animation: slideUp 0.3s ease;
  max-width: 400px;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* --- Responsive ---------------------------------------------- */
@media (max-width: 900px) {
  .app-layout { grid-template-columns: 1fr; }
  .left-panel { border-right: none; border-bottom: 1px solid var(--border-subtle); }
}

/* --- Scrollbar ----------------------------------------------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }