/* =====================================================================
   LISAAN OS — PRIVATE APPLICATION STYLESHEET
   Brand System: Omani Terracotta (Oxide) + Rich Ink on Warm Desert Paper
   Self-Hosted Typography: Lisaan Naskh + IBM Plex Arabic
   Zero external fonts, zero AI clichés, zero dark SaaS dashboard styling.
   ===================================================================== */

:root {
  /* Official Lisaan Brand Palette */
  --paper: #f2efe6;
  --ink: #171813;
  --white: #fcfbf7;
  --oxide: #b64a34;
  --moss: #566353;
  --sand: #d8d0c0;
  --muted: #6d6b63;
  --quiet: #e8e3d8;

  /* Aliased functional variables */
  --bg-canvas: var(--paper);
  --bg-surface: var(--white);
  --bg-elevated: var(--white);
  --bg-elevated-hover: var(--quiet);
  
  --border-subtle: var(--sand);
  --border-default: var(--sand);
  --border-focused: var(--oxide);
  
  --accent-primary: var(--oxide);
  --accent-hover: #9c3f2c;
  --accent-soft: rgba(182, 74, 52, 0.1);
  
  --text-primary: var(--ink);
  --text-secondary: var(--muted);
  --text-muted: #88867e;
  
  /* Semantic Status */
  --danger: #b64a34;
  --danger-bg: rgba(182, 74, 52, 0.08);
  --warning: #a36224;
  --warning-bg: rgba(163, 98, 36, 0.08);
  --success: var(--moss);
  --success-bg: rgba(86, 99, 83, 0.1);
  --info: #3d5a80;
  --info-bg: rgba(61, 90, 128, 0.08);
  
  /* Geometry & Typography */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  
  --font-arabic: "Plex Arabic", system-ui, -apple-system, sans-serif;
  --font-display: "Lisaan Naskh", "Noto Naskh Arabic", serif;
  --font-latin: "Plex Latin", system-ui, sans-serif;
  --container-max: 1240px;
  --shadow-card: 0 2px 8px rgba(23, 24, 19, 0.04), 0 1px 2px rgba(23, 24, 19, 0.06);
  --shadow-modal: 0 16px 36px rgba(23, 24, 19, 0.16);
  --transition-default: all 0.16s ease;
  
  color-scheme: light;
}

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

html {
  font-size: 16px;
  background-color: var(--paper);
  color: var(--ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-arabic);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  direction: rtl;
  overflow-x: hidden;
  max-width: 100%;
}

/* Tri-color top identity bar */
body::before {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--oxide) 0 18%, var(--ink) 18% 82%, var(--moss) 82%);
  content: "";
}

::selection {
  background: var(--oxide);
  color: var(--white);
}

/* App Shell Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(242, 239, 230, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--sand);
  padding: 0.75rem 1.5rem;
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-logo {
  height: 34px;
  width: auto;
  display: block;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
  background-color: var(--quiet);
  color: var(--moss);
  border: 1px solid var(--sand);
  letter-spacing: 0.02em;
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--quiet);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--sand);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--font-arabic);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-default);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

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

.tab-btn.active {
  color: var(--ink);
  background-color: var(--white);
  box-shadow: 0 1px 4px rgba(23, 24, 19, 0.08);
  border: 1px solid var(--sand);
}

.user-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-profile-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.25rem 0.75rem;
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--moss);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.user-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
}

.user-role-tag {
  font-size: 0.72rem;
  color: var(--oxide);
  font-weight: 600;
}

.btn-secondary {
  background-color: var(--white);
  border: 1px solid var(--sand);
  color: var(--ink);
  font-family: var(--font-arabic);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-default);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-secondary:hover {
  background-color: var(--quiet);
  border-color: var(--muted);
}

.btn-primary {
  background-color: var(--oxide);
  border: 1px solid var(--oxide);
  color: var(--white);
  font-family: var(--font-arabic);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition-default);
  box-shadow: 0 2px 6px rgba(182, 74, 52, 0.2);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Main Workspace */
.main-content {
  flex: 1;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3.5rem;
}

/* Tab Panels */
.tab-panel {
  display: none;
}

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

/* Workspace Grid: Editor & Results */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 980px) {
  .workspace-grid {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
  }
}

/* Writing Surface Card */
.editor-card {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--quiet);
}

.toolbar-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.select-control {
  background-color: var(--white);
  border: 1px solid var(--sand);
  color: var(--ink);
  font-family: var(--font-arabic);
  font-size: 0.88rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  transition: var(--transition-default);
}

.select-control:focus {
  border-color: var(--oxide);
  box-shadow: 0 0 0 3px rgba(182, 74, 52, 0.1);
}

.toggle-context-btn {
  background: var(--quiet);
  border: 1px solid var(--sand);
  color: var(--ink);
  font-family: var(--font-arabic);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-default);
}

.toggle-context-btn:hover {
  background: var(--white);
  border-color: var(--oxide);
}

.btn-contrib-trigger {
  background: transparent;
  border: 1px dashed var(--moss);
  color: var(--moss);
  font-family: var(--font-arabic);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-default);
}

.btn-contrib-trigger:hover {
  background: var(--success-bg);
}

/* Context Drawer */
.context-drawer {
  background-color: var(--quiet);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.85rem;
}

.context-drawer.hidden {
  display: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.input-control {
  background-color: var(--white);
  border: 1px solid var(--sand);
  color: var(--ink);
  font-family: var(--font-arabic);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition-default);
}

.input-control:focus {
  border-color: var(--oxide);
  box-shadow: 0 0 0 3px rgba(182, 74, 52, 0.1);
}

/* Textarea Surface */
.textarea-wrapper {
  position: relative;
  margin-bottom: 1rem;
}

.main-textarea {
  width: 100%;
  min-height: 380px;
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-family: var(--font-arabic);
  font-size: 1.15rem;
  line-height: 1.85;
  padding: 1.25rem;
  resize: vertical;
  outline: none;
  transition: var(--transition-default);
}

.main-textarea:focus {
  border-color: var(--oxide);
  box-shadow: 0 0 0 3px rgba(182, 74, 52, 0.12);
}

.main-textarea::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.editor-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.editor-stats {
  display: flex;
  gap: 1.25rem;
  font-size: 0.88rem;
  color: var(--muted);
}

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

.shortcut-hint {
  font-size: 0.78rem;
  color: var(--muted);
  font-family: var(--font-latin);
}

/* Results Card */
.results-card {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  min-height: 500px;
}

.empty-results {
  height: 100%;
  min-height: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted);
  padding: 2.5rem;
}

.empty-results h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.empty-results p {
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 420px;
}

.empty-results-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 1.25rem;
  stroke: var(--muted);
  opacity: 0.6;
}

/* Epistemic Status Banner */
.status-banner {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
}

.status-banner.status-ready {
  background-color: var(--success-bg);
  border-color: rgba(86, 99, 83, 0.3);
  color: var(--moss);
}

.status-banner.status-issues {
  background-color: var(--warning-bg);
  border-color: rgba(163, 98, 36, 0.3);
  color: var(--warning);
}

.status-banner.status-indeterminate {
  background-color: var(--info-bg);
  border-color: rgba(61, 90, 128, 0.3);
  color: var(--info);
}

.status-banner.status-clarification {
  background-color: var(--danger-bg);
  border-color: rgba(182, 74, 52, 0.3);
  color: var(--danger);
}

.status-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-subtitle {
  font-size: 0.85rem;
  opacity: 0.92;
  margin-top: 0.2rem;
}

/* Annotated Text Display */
.annotated-text-card {
  background-color: var(--quiet);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  font-size: 1.15rem;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-word;
}

.issue-span {
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--transition-default);
}

.issue-span.severity-critical {
  background-color: rgba(182, 74, 52, 0.18);
  border-bottom: 2px solid var(--oxide);
}

.issue-span.severity-medium {
  background-color: rgba(163, 98, 36, 0.18);
  border-bottom: 2px solid var(--warning);
}

.issue-span.severity-advisory {
  background-color: rgba(61, 90, 128, 0.15);
  border-bottom: 2px dashed var(--info);
}

.issue-span:hover, .issue-span.focused {
  background-color: rgba(182, 74, 52, 0.28);
  outline: 2px solid var(--oxide);
}

/* Rewrite Guidance Box */
.guidance-box {
  background: var(--quiet);
  border: 1px solid var(--sand);
  border-right: 4px solid var(--oxide);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.guidance-header {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--oxide);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.guidance-body {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink);
}

/* Issues List */
.issues-section {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.section-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.issue-card {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1rem;
  transition: var(--transition-default);
}

.issue-card.focused {
  border-color: var(--oxide);
  box-shadow: 0 0 0 2px rgba(182, 74, 52, 0.15);
}

.issue-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.issue-gate-tag {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background-color: var(--quiet);
  color: var(--ink);
}

.severity-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
}

.severity-pill.critical { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(182, 74, 52, 0.2); }
.severity-pill.medium { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(163, 98, 36, 0.2); }
.severity-pill.advisory { background: var(--info-bg); color: var(--info); border: 1px solid rgba(61, 90, 128, 0.2); }

.issue-diagnostic {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.issue-span-preview {
  font-size: 0.88rem;
  background-color: var(--quiet);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border-right: 3px solid var(--oxide);
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.issue-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--quiet);
  padding-top: 0.65rem;
}

/* Editorial & Governance Callouts */
.editorial-box {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.educational-box {
  background-color: var(--quiet);
  border-right: 4px solid var(--moss);
  color: var(--ink);
  font-size: 0.95rem;
}

.banner-prohibition {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--danger-bg);
  border: 1px solid rgba(182, 74, 52, 0.3);
  color: var(--oxide);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

/* Stats Dashboard */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

/* Contribution & Lab Tables */
.contributions-container, .lab-container {
  max-width: 1000px;
  margin: 0 auto;
}

.contribution-card {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-card);
}

.contribution-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.withdrawal-box {
  background-color: var(--quiet);
  border: 1px solid var(--sand);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin: 1rem 0;
}

.withdrawal-code {
  font-family: var(--font-latin);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--oxide);
  user-select: all;
  word-break: break-all;
  direction: ltr;
  text-align: left;
}

.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--quiet);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--ink);
  line-height: 1.6;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(23, 24, 19, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

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

.modal-dialog {
  background-color: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.75rem;
  box-shadow: var(--shadow-modal);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--quiet);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: var(--ink);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: var(--ink);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 4px 14px rgba(23, 24, 19, 0.2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: slideIn 0.2s ease-out;
}

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

/* Responsive Mobile Layout (<= 768px) */
@media (max-width: 768px) {
  .app-header {
    padding: 0.6rem 0.75rem;
  }

  .header-container {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .brand-section {
    gap: 0.5rem;
  }

  .brand-logo {
    height: 28px;
  }

  .nav-tabs {
    order: 3;
    width: 100%;
    overflow-x: auto;
    justify-content: flex-start;
    padding: 0.2rem;
    -webkit-overflow-scrolling: touch;
  }

  .tab-btn {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    white-space: nowrap;
  }

  .main-content {
    padding: 1rem 0.75rem 2.5rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .editor-card {
    padding: 0.85rem;
    width: 100%;
    box-sizing: border-box;
  }

  .editor-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .toolbar-controls {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .select-control {
    width: 100%;
    max-width: 100%;
  }

  .btn-contrib-trigger {
    width: 100%;
    justify-content: center;
  }

  .editor-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .editor-actions {
    width: 100%;
    justify-content: stretch;
  }

  .editor-actions button {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}