:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --secondary: #1e293b;
  --secondary-hover: #0f172a;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-modal: #ffffff;
  --border: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --radius-lg: 12px;
  --sidebar-width: 260px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  height: 72px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

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

.logo-icon {
  font-size: 24px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-name {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.sidebar-nav {
  padding: 24px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-item:hover {
  background-color: var(--bg-app);
  color: var(--text-main);
}

.nav-item.active {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-icon {
  font-size: 18px;
}

.sidebar-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
}

.stats-mini {
  display: flex;
  gap: 16px;
}

.stat-mini-item {
  display: flex;
  flex-direction: column;
}

.stat-mini-val {
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
}

.stat-mini-lbl {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

/* ── MAIN CONTENT ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  height: 72px;
  padding: 0 32px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.page-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.topbar-right {
  display: flex;
  gap: 12px;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-app);
  border-color: #cbd5e1;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

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

.btn-danger {
  background-color: var(--danger-light);
  color: var(--danger);
}

.btn-danger:hover {
  background-color: var(--danger);
  color: white;
}

/* ── PAGES ── */
.page {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 32px;
}

.page.active {
  display: block;
}

/* ── TOOLBAR ── */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  gap: 16px;
}

.search-wrap {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.search-input {
  width: 100%;
  padding: 10px 16px 10px 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
  background-color: var(--bg-surface);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-chips {
  display: flex;
  gap: 8px;
}

.chip {
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 13px;
  font-weight: 500;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  background-color: var(--bg-app);
}

.chip.active {
  background-color: var(--secondary);
  color: white;
  border-color: var(--secondary);
}

/* ── CONTRACT CARDS ── */
.contracts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.contract-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.2s ease;
  position: relative;
}

.contract-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: #cbd5e1;
}

.cc-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.cc-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.cc-badge {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.cc-badge.active {
  background-color: #dcfce7;
  color: #166534;
}

.cc-badge.draft {
  background-color: #f1f5f9;
  color: #475569;
}

.cc-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cc-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.cc-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.cc-meta-lbl {
  color: var(--text-muted);
  width: 80px;
}

.cc-meta-val {
  font-family: var(--font-mono);
  font-size: 12px;
  background-color: var(--bg-app);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--secondary);
}

.cc-actions {
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 32px;
  text-align: center;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px dashed #cbd5e1;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-main);
  margin-bottom: 8px;
}

/* ── MODAL ── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background-color: var(--bg-modal);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 20px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}

.modal-close:hover {
  background-color: var(--bg-app);
  color: var(--text-main);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.modal-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ── TABS ── */
.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  overflow-x: auto;
}

.mtab {
  padding: 12px 24px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
}

.mtab:hover {
  color: var(--text-main);
}

.mtab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── FORMS ── */
.form-row {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  flex: 1;
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--secondary);
}

.form-label .req {
  color: var(--danger);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s;
  background-color: #fff;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-textarea {
  resize: vertical;
}

.form-hint {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}

.checkbox-label.big {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  padding: 12px;
  background-color: var(--primary-light);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mt-16 { margin-top: 16px; }
.mt-8 { margin-top: 8px; }

/* ── FIELD BUILDER ── */
.fields-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.fields-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background-color: var(--bg-app);
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.field-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-col.name { flex: 2; }
.field-col.type { flex: 1; }
.field-col.req { flex: 1; align-items: center; justify-content: center; padding-top: 8px; }
.field-col.actions { width: 40px; justify-content: center; padding-top: 4px; }

.section-divider {
  margin: 24px 0 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.quick-add-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip-add {
  padding: 4px 10px;
  background-color: #fff;
  border: 1px dashed var(--primary);
  color: var(--primary);
  font-size: 12px;
  font-family: var(--font-mono);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.chip-add:hover {
  background-color: var(--primary-light);
}

.session-rules, .financial-rules {
  background-color: var(--bg-app);
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-top: 12px;
}

/* ── SQL PREVIEW ── */
.preview-sql-wrap {
  background-color: #0f172a;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}

.preview-header {
  background-color: #1e293b;
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #334155;
}

.preview-label {
  color: #94a3b8;
  font-size: 12px;
  font-family: var(--font-mono);
}

.preview-header .btn-ghost {
  color: #cbd5e1;
}

.preview-header .btn-ghost:hover {
  background-color: #334155;
  color: #fff;
}

.sql-preview {
  padding: 16px;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  max-height: 300px;
}

.rule-summary {
  background-color: var(--bg-app);
  padding: 16px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--secondary);
}

.rule-summary ul {
  padding-left: 20px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ── MATRIX PAGE ── */
.table-wrap {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.matrix-table th {
  background-color: var(--bg-app);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.matrix-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.matrix-table tr:hover td {
  background-color: var(--bg-app);
}

.matrix-table .tag {
  display: inline-block;
  padding: 2px 6px;
  background-color: var(--primary-light);
  color: var(--primary-hover);
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  margin: 2px;
}

.matrix-table .tag.req {
  background-color: #fee2e2;
  color: #b91c1c;
}

.matrix-table .tag.opt {
  background-color: #f1f5f9;
  color: #475569;
}

/* ── GENERATOR PAGE ── */
.generator-layout {
  display: flex;
  gap: 24px;
  height: 100%;
}

.gen-config-panel {
  width: 350px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.panel-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.panel-card-header h3 {
  font-size: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.contract-select-list {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  background-color: var(--bg-app);
}

.contract-select-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  font-size: 13px;
  border-radius: 4px;
}

.contract-select-item:hover {
  background-color: var(--bg-surface);
}

.gen-stats {
  display: flex;
  justify-content: space-between;
}

.gen-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gen-stat-val {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.gen-stat-lbl {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.gen-output-panel {
  flex: 1;
  background-color: #0f172a;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.output-header {
  background-color: #1e293b;
  padding: 0 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 50px;
}

.output-tabs {
  display: flex;
  height: 100%;
}

.otab {
  background: transparent;
  border: none;
  color: #94a3b8;
  padding: 0 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.otab:hover {
  color: #f8fafc;
}

.otab.active {
  color: #38bdf8;
  border-bottom-color: #38bdf8;
}

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

.output-body {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.sql-output {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 24px;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  overflow: auto;
  margin: 0;
  white-space: pre;
}

.sql-output.hidden {
  display: none;
}

/* Syntax highlighting basics */
.sql-keyword { color: #c678dd; font-weight: bold; }
.sql-string { color: #98c379; }
.sql-comment { color: #5c6370; font-style: italic; }
.sql-function { color: #61afef; }
.sql-column { color: #e5c07b; }

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--secondary);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { background-color: var(--success); }
.toast.error { background-color: var(--danger); }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }
.sql-output::-webkit-scrollbar-thumb { background: #475569; }
.sql-output::-webkit-scrollbar-thumb:hover { background: #64748b; }