/* ==============================================================================
   GrantLoom — Modern Academic UI Theme & WCAG AA Accessible Design System
   ============================================================================== */

:root {
  /* Color Palette - Neutral Slate with Academic Teal & Sky */
  --bg-primary: #0f172a;       /* Deep slate base */
  --bg-surface: #1e293b;       /* Card and panel surfaces */
  --bg-surface-elevated: #334155;
  --bg-surface-hover: #273549;

  --border-subtle: #334155;
  --border-focus: #38bdf8;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-teal: #14b8a6;
  --accent-teal-glow: rgba(20, 184, 166, 0.2);
  --accent-blue: #0284c7;
  --accent-blue-hover: #0369a1;

  --highlight-bg: #fef08a;     /* Yellow keyword highlight */
  --highlight-text: #854d0e;

  --status-success: #10b981;
  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-danger: #ef4444;
  --status-danger-bg: rgba(239, 68, 68, 0.15);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --focus-ring: 2px solid #38bdf8;
  --focus-offset: 2px;
}

/* Base reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessible focus styling */
:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* WCAG Skip to Main Content Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--accent-blue);
  color: #ffffff;
  padding: 8px 16px;
  z-index: 9999;
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* Top Navigation Header */
.app-header {
  height: 64px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo-badge {
  font-size: 24px;
  background: rgba(2, 132, 199, 0.2);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--accent-teal);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}

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

/* Status Chips */
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border-subtle);
}

.status-chip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.chip-success {
  background: var(--status-success-bg);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}
.chip-success .dot { background-color: var(--status-success); }

.chip-warning {
  background: var(--status-warning-bg);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
}
.chip-warning .dot { background-color: var(--status-warning); }

.chip-danger {
  background: var(--status-danger-bg);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
}
.chip-danger .dot { background-color: var(--status-danger); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease-in-out;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #ffffff;
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-blue-hover);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}
.btn-icon:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
}

/* App Layout */
.app-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  flex: 1;
  min-height: calc(100vh - 64px);
}

/* Sidebar */
.app-sidebar {
  background-color: #131d31;
  border-right: 1px solid var(--border-subtle);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.nav-tabs {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  background: none;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.nav-tab:hover {
  color: var(--text-primary);
  background-color: rgba(51, 65, 85, 0.4);
}

.nav-tab.active {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
  border-color: rgba(56, 189, 248, 0.3);
  font-weight: 600;
}

.nav-tab .badge {
  margin-left: auto;
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
}

.sidebar-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 12px;
}

.starter-prompts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.starter-prompt-card {
  padding: 10px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.starter-prompt-card:hover {
  border-color: var(--accent-teal);
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
}

.starter-prompt-category {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--accent-teal);
  font-weight: 600;
  margin-bottom: 4px;
  display: block;
}

/* Main Workspace */
.app-workspace {
  padding: 28px 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
}

.workspace-view.hidden {
  display: none !important;
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.view-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.view-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Alert Banner */
.alert-banner {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 12px 18px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.875rem;
  color: #fef3c7;
}

.alert-banner.hidden {
  display: none;
}

.alert-icon { font-size: 1.25rem; }

.alert-content { flex: 1; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border-subtle);
  background: var(--bg-surface);
  border-radius: 10px;
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-teal);
  background: rgba(20, 184, 166, 0.05);
}

.dropzone.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.dropzone-icon {
  font-size: 40px;
  display: block;
  margin-bottom: 12px;
}

.dropzone-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.browse-link {
  color: var(--accent-teal);
  text-decoration: underline;
}

.dropzone-content p {
  color: var(--text-secondary);
  font-size: 0.825rem;
  margin-top: 6px;
}

/* Progress bar */
.progress-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 14px 18px;
}

.progress-container.hidden { display: none; }

.progress-bar-wrap {
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-blue));
  transition: width 0.3s ease;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Tables */
.table-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.data-table th {
  background: rgba(15, 23, 42, 0.6);
  padding: 12px 16px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

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

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px !important;
}

/* Status Badges */
.badge-status {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
.badge-active { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-processing { background: rgba(2, 132, 199, 0.2); color: #38bdf8; }
.badge-quarantined { background: rgba(239, 68, 68, 0.2); color: #f87171; }

/* Reasoning SSE Trail */
.reasoning-trail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
}

.reasoning-trail.hidden { display: none; }

.trail-pill {
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.trail-pill.done {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.trail-pill.active {
  background: rgba(2, 132, 199, 0.2);
  border-color: var(--accent-blue);
  color: #38bdf8;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Chat Transcript */
.chat-transcript {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 280px;
}

.chat-welcome {
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-subtle);
  border-radius: 8px;
  color: var(--text-secondary);
}

.welcome-icon { font-size: 32px; margin-bottom: 8px; }

.message-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border-radius: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.message-user {
  background: #1e2e4a;
  border-color: rgba(56, 189, 248, 0.3);
  align-self: flex-end;
  max-width: 80%;
}

.message-bot {
  background: var(--bg-surface);
  align-self: flex-start;
  width: 100%;
}

.message-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.message-body {
  font-size: 0.925rem;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Confidence score badge */
.confidence-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}
.confidence-high { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.confidence-mid { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.confidence-low { background: rgba(239, 68, 68, 0.2); color: #f87171; }

/* Clickable Citation Badges */
.citation-badge {
  display: inline-block;
  background: rgba(14, 165, 233, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.4);
  padding: 1px 6px;
  margin: 0 2px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.citation-badge:hover {
  background: rgba(14, 165, 233, 0.4);
  border-color: #38bdf8;
}

/* Chat Input */
.chat-input-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 14px;
  position: sticky;
  bottom: 20px;
}

.chat-textarea {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 12px;
  font-family: inherit;
  font-size: 0.9rem;
  resize: vertical;
}

.chat-form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.keyboard-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Compliance Controls & Scorecard */
.compliance-controls-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 16px 20px;
  border-radius: 8px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.readiness-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(20, 184, 166, 0.4);
  border-radius: 10px;
  padding: 24px;
}

.readiness-metric {
  display: flex;
  align-items: center;
  gap: 24px;
}

.metric-circle {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 4px solid var(--accent-teal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-teal);
}

.metric-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.readiness-disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-top: 6px;
}

/* Form elements */
.form-select, .form-input {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.875rem;
}

.form-select {
  cursor: pointer;
}

/* Slide-Over Citation Drawer */
.citation-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 440px;
  height: 100vh;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transform: translateX(0);
  transition: transform 0.25s ease-in-out;
}

.citation-drawer.hidden {
  transform: translateX(100%);
  pointer-events: none;
}

.drawer-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-subtitle {
  font-size: 0.8rem;
  color: var(--accent-teal);
}

.drawer-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.drawer-meta-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 12px;
  font-size: 0.8rem;
}

.meta-row {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}

.meta-label {
  font-weight: 600;
  color: var(--text-secondary);
  width: 80px;
}

.drawer-excerpt-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 16px;
}

.drawer-excerpt-card h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.drawer-text {
  font-size: 0.9rem;
  line-height: 1.6;
  white-space: pre-wrap;
  color: var(--text-primary);
}

/* Keyword Highlighting in Citation Drawer */
mark.kw-highlight {
  background-color: var(--highlight-bg);
  color: var(--highlight-text);
  padding: 0.1em 0.25em;
  border-radius: 2px;
  font-weight: 600;
}

/* Backdrop */
.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
}
.backdrop.hidden { display: none; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.hidden { display: none; }

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  width: 540px;
  max-width: 90vw;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background: rgba(15, 23, 42, 0.4);
}

.settings-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

.subtab {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
}

.subtab.active {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-with-button {
  display: flex;
  gap: 8px;
}
.input-with-button input, .input-with-button select { flex: 1; }

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
}

.probe-result {
  font-size: 0.8rem;
  font-weight: 500;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 6px 0;
}

.demo-section h4 { font-size: 0.9rem; font-weight: 600; }
.demo-section p { font-size: 0.8rem; color: var(--text-secondary); margin: 4px 0 10px; }

/* Unverified-answer warning (FR-Q7) */
.message-warning {
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
  font-size: 0.85rem;
}
.message-warning ul { margin: 6px 0 0 18px; }