/* ==========================================================================
   DocuMind design system
   Style: Minimalism & Swiss Style + AI-Native UI
   Type:  Atkinson Hyperlegible (Latin), Noto Sans Arabic (Arabic)
   ========================================================================== */

:root {
  color-scheme: light;

  --color-primary: #475569;
  --color-on-primary: #ffffff;
  --color-secondary: #64748b;
  --color-on-secondary: #ffffff;
  --color-accent: #2563eb;
  --color-accent-strong: #1d4ed8;
  --color-accent-soft: #dbeafe;
  --color-on-accent: #ffffff;
  --color-background: #f8fafc;
  --color-foreground: #1e293b;
  --color-card: #ffffff;
  --color-card-foreground: #1e293b;
  --color-muted: #eaeff3;
  --color-muted-foreground: #475569;
  --color-border: #e2e8f0;
  --color-destructive: #dc2626;
  --color-on-destructive: #ffffff;
  --color-danger-bg: #fee2e2;
  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-warning: #b45309;
  --color-warning-bg: #fef3c7;
  --color-ring: #475569;

  --font-sans: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-arabic: "Noto Sans Arabic", "Atkinson Hyperlegible", -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px -18px rgba(15, 23, 42, 0.28);
  --shadow-lg: 0 24px 60px -30px rgba(15, 23, 42, 0.4);

  --transition: 180ms ease;
  --sidebar-width: 264px;
}

[data-theme="dark"] {
  color-scheme: dark;

  --color-primary: #cbd5e1;
  --color-on-primary: #0b1220;
  --color-secondary: #94a3b8;
  --color-on-secondary: #0b1220;
  --color-accent: #60a5fa;
  --color-accent-strong: #93c5fd;
  --color-accent-soft: #172554;
  --color-on-accent: #0b1220;
  --color-background: #0b1220;
  --color-foreground: #e2e8f0;
  --color-card: #111c2e;
  --color-card-foreground: #e2e8f0;
  --color-muted: #1b2a41;
  --color-muted-foreground: #94a3b8;
  --color-border: #24344d;
  --color-destructive: #f87171;
  --color-on-destructive: #0b1220;
  --color-danger-bg: #450a0a;
  --color-success: #4ade80;
  --color-success-bg: #052e16;
  --color-warning: #fbbf24;
  --color-warning-bg: #3b2a05;
  --color-ring: #93c5fd;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 34px -20px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 28px 70px -34px rgba(0, 0, 0, 0.9);
}

/* ----------------------------------------------------------------- reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

html[lang="ar"] body {
  font-family: var(--font-arabic);
  line-height: 1.7;
}

h1, h2, h3, h4, p, dl, dd, dt, ol, ul {
  margin: 0;
}

ol, ul {
  padding: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

img, svg {
  display: block;
  max-width: 100%;
}

.icon {
  flex-shrink: 0;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-foreground);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  inset-block-start: -60px;
  inset-inline-start: 16px;
  z-index: 2000;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  font-weight: 700;
}

.skip-link:focus {
  inset-block-start: 12px;
}

/* ------------------------------------------------------------- app shell */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  max-width: 1680px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  inset-block-start: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-4);
  border-inline-end: 1px solid var(--color-border);
  background: var(--color-card);
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-foreground);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-on-accent);
  box-shadow: var(--shadow-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  min-width: 0;
}

.brand-text strong {
  font-size: 16px;
  letter-spacing: -0.01em;
}

.brand-text small {
  font-size: 11.5px;
  color: var(--color-muted-foreground);
}

.nav {
  display: grid;
  gap: var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-muted-foreground);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  background: var(--color-muted);
  color: var(--color-foreground);
  text-decoration: none;
}

.nav-link.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.nav-count {
  margin-inline-start: auto;
  min-width: 22px;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--color-muted);
  color: var(--color-muted-foreground);
  font-size: 11.5px;
  text-align: center;
}

.nav-link.is-active .nav-count {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.sidebar-spacer {
  flex: 1;
}

.status-card {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-muted) 45%, transparent);
}

.status-card-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  font-weight: 700;
}

.status-list {
  display: grid;
  gap: 6px;
}

.status-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

.status-list dt {
  font-size: 12px;
  color: var(--color-muted-foreground);
}

.status-list dd {
  font-size: 12.5px;
  font-weight: 700;
}

.sidebar-foot {
  font-size: 11px;
  line-height: 1.4;
  color: var(--color-muted-foreground);
  padding-inline: var(--space-2);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-muted-foreground);
  flex-shrink: 0;
}

.status-dot.is-on {
  background: var(--color-success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-success) 18%, transparent);
}

.status-dot.is-off {
  background: var(--color-warning);
}

.status-dot.is-error {
  background: var(--color-destructive);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
}

/* --------------------------------------------------------------- main */
.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

.topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-background) 82%, transparent);
  backdrop-filter: blur(10px);
}

.page-heading {
  min-width: 0;
}

.page-heading h1 {
  font-size: 19px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-heading p {
  font-size: 12.5px;
  color: var(--color-muted-foreground);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 62ch;
}

.topbar-actions {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.main-content {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--space-6);
  flex: 1;
}

.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted-foreground);
  font-size: 12px;
}

.app-footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-muted-foreground);
}

.menu-btn {
  display: none;
}

/* ------------------------------------------------------------- controls */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  color: var(--color-muted-foreground);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.icon-btn:hover {
  background: var(--color-muted);
  color: var(--color-foreground);
}

.icon-btn.danger:hover {
  background: var(--color-danger-bg);
  color: var(--color-destructive);
  border-color: var(--color-destructive);
}

.icon-btn.btn-sm {
  width: 32px;
  height: 32px;
  padding: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--color-foreground);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn-primary:hover {
  background: var(--color-accent-strong);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-card);
  border-color: var(--color-border);
  color: var(--color-foreground);
}

.btn-secondary:hover {
  background: var(--color-muted);
  text-decoration: none;
}

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

.btn-ghost:hover {
  background: var(--color-muted);
  color: var(--color-foreground);
  text-decoration: none;
}

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

.btn-danger:hover {
  filter: brightness(0.94);
}

.btn-sm {
  height: 34px;
  padding: 0 12px;
  font-size: 13px;
}

.btn-xs {
  height: 28px;
  padding: 0 8px;
  font-size: 12px;
  border-radius: 7px;
}

.btn-block {
  width: 100%;
}

.btn:disabled,
.btn[aria-busy="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn[aria-busy="true"] .icon {
  animation: spin 0.9s linear infinite;
}

.link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
}

[dir="rtl"] .link .icon,
[dir="rtl"] .suggestion .icon {
  transform: scaleX(-1);
}

.select-with-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.select-with-icon .icon {
  position: absolute;
  inset-inline-start: 10px;
  color: var(--color-muted-foreground);
  pointer-events: none;
}

.select-with-icon .select {
  padding-inline-start: 32px;
}

.select,
.input,
.textarea {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
  color: var(--color-foreground);
  font-size: 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.select {
  cursor: pointer;
}

.select-sm {
  min-height: 36px;
  padding-block: 6px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.55;
}

.select:focus,
.input:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group .input {
  padding-inline-end: 46px;
}

.input-affix {
  position: absolute;
  inset-inline-end: 4px;
  inset-block-start: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border: none;
  background: transparent;
}

.input-affix:hover {
  background: var(--color-muted);
}

.field {
  margin-bottom: var(--space-4);
}

.field:last-child {
  margin-bottom: 0;
}

.label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 700;
}

.hint {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--color-muted-foreground);
}

.hint-ok {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-success);
  font-weight: 700;
}

.muted {
  color: var(--color-muted-foreground);
}

.mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.range-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.range-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-accent);
}

.range-row output {
  min-width: 44px;
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: 7px;
  background: var(--color-muted);
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.switch {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.switch-track {
  position: relative;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
  margin-top: 1px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-muted);
  transition: background var(--transition), border-color var(--transition);
}

.switch-track::after {
  content: "";
  position: absolute;
  inset-block-start: 2px;
  inset-inline-start: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}

.switch input:checked + .switch-track {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.switch input:checked + .switch-track::after {
  transform: translateX(18px);
}

[dir="rtl"] .switch input:checked + .switch-track::after {
  transform: translateX(-18px);
}

.switch input:focus-visible + .switch-track {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

.switch-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.switch-text strong {
  font-size: 13.5px;
}

.switch-text .hint {
  margin: 0;
}

/* ---------------------------------------------------------------- cards */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.card-title {
  font-size: 17px;
  letter-spacing: -0.01em;
}

.card-desc {
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ----------------------------------------------------------------- hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6);
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 100% 0%, color-mix(in srgb, var(--color-accent-soft) 70%, transparent) 0%, transparent 55%),
    var(--color-card);
}

.hero h2 {
  margin: var(--space-3) 0 var(--space-2);
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero p {
  max-width: 58ch;
  font-size: 14.5px;
  color: var(--color-muted-foreground);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-visual {
  width: 100%;
  max-width: 380px;
  justify-self: end;
}

/* ----------------------------------------------------------------- stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-5);
}

.stat-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.stat-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.stat-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted-foreground);
}

.stat-value {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.stat-sub {
  margin-top: 2px;
  font-size: 12px;
  color: var(--color-muted-foreground);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
  gap: var(--space-4);
  align-items: start;
}

/* ---------------------------------------------------------------- tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.table th {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-muted) 55%, transparent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted-foreground);
  text-align: start;
  white-space: nowrap;
}

.table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:hover {
  background: color-mix(in srgb, var(--color-muted) 38%, transparent);
}

.doc-name {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.doc-name-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
  max-width: 34ch;
}

.file-chip {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--color-muted);
  color: var(--color-muted-foreground);
}

.doc-error {
  display: block;
  margin-top: 3px;
  padding-inline-start: 40px;
  font-size: 11.5px;
  color: var(--color-destructive);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 42ch;
}

.row-actions {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
}

.cell-actions {
  text-align: end;
  white-space: nowrap;
}

/* ---------------------------------------------------------------- badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-destructive);
}

/* ----------------------------------------------------------------- steps */
.steps {
  display: grid;
  gap: var(--space-4);
  list-style: none;
}

.steps li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.step-num {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 12.5px;
  font-weight: 700;
}

.steps strong {
  font-size: 13.5px;
}

.steps p {
  margin-top: 2px;
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.callout {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: var(--space-5);
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: color-mix(in srgb, var(--color-muted) 45%, transparent);
  color: var(--color-muted-foreground);
  font-size: 12.5px;
}

.callout .icon {
  color: var(--color-accent);
  margin-top: 1px;
}

/* ------------------------------------------------------------ empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: var(--space-7) var(--space-5);
  text-align: center;
}

.empty-state.compact {
  padding: var(--space-5) var(--space-4);
}

.empty-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--color-muted);
  color: var(--color-muted-foreground);
  margin-bottom: 4px;
}

.empty-state h2,
.empty-state h3 {
  font-size: 16px;
  letter-spacing: -0.01em;
}

.empty-state p {
  max-width: 48ch;
  font-size: 13px;
  color: var(--color-muted-foreground);
}

.error-state h2 {
  font-size: 42px;
  color: var(--color-accent);
}

/* ------------------------------------------------------------------ chat */
.chat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: 100%;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: calc(100vh - 165px);
  min-height: 600px;
  padding: 0;
  overflow: hidden;
}

.chat-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.chat-panel-head h2 {
  font-size: 17px;
}

.chat-panel-head p {
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.chat-head-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  scroll-behavior: smooth;
}

.chat-empty {
  margin: auto;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: var(--space-4);
}

.chat-empty h3 {
  font-size: 18px;
  letter-spacing: -0.01em;
}

.chat-empty p {
  font-size: 13px;
  color: var(--color-muted-foreground);
  max-width: 46ch;
}

.suggestions {
  display: grid;
  gap: 8px;
  width: 100%;
  margin-top: var(--space-3);
}

.suggestion {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
  color: var(--color-foreground);
  font-size: 13px;
  text-align: start;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.suggestion:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.suggestion .icon {
  color: var(--color-accent);
}

.message {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 100%;
}

.message.is-user {
  flex-direction: row-reverse;
}

.message-avatar {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 700;
}

.message.is-user .message-avatar {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.message-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  max-width: 86%;
}

.message.is-user .message-body {
  align-items: flex-end;
}

.message-meta {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 11.5px;
  color: var(--color-muted-foreground);
}

.message-meta strong {
  color: var(--color-foreground);
  font-size: 12.5px;
}

.message-content {
  font-size: 14.5px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.message.is-user .message-content {
  padding: 9px 14px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-muted) 55%, transparent);
}

.message-content p {
  margin: 0 0 10px;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content ul,
.message-content ol {
  margin: 6px 0 10px;
  padding-inline-start: 22px;
}

.message-content li {
  margin-bottom: 3px;
}

.message-content code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.message-content pre {
  margin: 8px 0;
  padding: 12px;
  border-radius: 10px;
  background: var(--color-muted);
  overflow-x: auto;
}

.message-content pre code {
  padding: 0;
  background: none;
}

.message-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.citations {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.citation {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-muted-foreground);
  font-size: 11.5px;
  font-weight: 600;
  text-decoration: none;
  max-width: 100%;
}

.citation:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.citation .citation-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 26ch;
}

.citation .citation-score {
  color: var(--color-muted-foreground);
  font-weight: 400;
}

.message-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition);
}

.message:hover .message-actions,
.message:focus-within .message-actions {
  opacity: 1;
}

.typing {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 var(--space-5) 10px;
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.typing-dots {
  display: inline-flex;
  gap: 3px;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-muted-foreground);
  animation: bounce 1.2s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

.composer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-card);
}

.composer textarea {
  width: 100%;
  min-height: 48px;
  max-height: 160px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-foreground);
  font-size: 14.5px;
  line-height: 1.5;
  resize: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.composer textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.composer-hint {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  color: var(--color-muted-foreground);
}

.chat-side {
  display: grid;
  gap: var(--space-4);
  position: sticky;
  inset-block-start: 88px;
}

.side-card {
  padding: var(--space-4);
}

.side-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-3);
  color: var(--color-muted-foreground);
}

.side-card-head h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.source-list {
  display: grid;
  gap: 8px;
}

.source-list .muted {
  font-size: 12.5px;
}

.source-item {
  padding: 9px 11px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: color-mix(in srgb, var(--color-muted) 35%, transparent);
}

.source-item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.source-item-name {
  font-size: 12.5px;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-item-score {
  font-size: 11px;
  color: var(--color-muted-foreground);
  white-space: nowrap;
}

.source-item-excerpt {
  margin-top: 3px;
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--color-muted-foreground);
  display: -webkit-box;
  /* -webkit-line-clamp: 2; */
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.meta-list {
  display: grid;
  gap: 10px;
  margin-bottom: var(--space-4);
}

.meta-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.meta-list dt {
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.meta-list dd {
  font-size: 12.5px;
  font-weight: 700;
  text-align: end;
  overflow-wrap: anywhere;
}

.side-callout {
  margin: 0;
}

/* ------------------------------------------------------------- documents */
.docs-card {
  padding: var(--space-5);
}

.docs-head {
  align-items: center;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.doc-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.doc-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: color-mix(in srgb, var(--color-muted) 38%, transparent);
}

.doc-stat .stat-label {
  font-size: 10.5px;
}

.doc-stat strong {
  font-size: 20px;
  letter-spacing: -0.02em;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-muted) 28%, transparent);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.dropzone:hover,
.dropzone.is-dragover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.dropzone-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  color: var(--color-accent);
  margin-bottom: 2px;
}

.dropzone p {
  font-size: 13.5px;
}

.dropzone-hint {
  font-size: 11.5px;
  color: var(--color-muted-foreground);
}

.sync-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  margin-bottom: var(--space-4);
  border-radius: 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
}

.sync-banner .icon {
  animation: spin 1.2s linear infinite;
}

/* -------------------------------------------------------------- settings */
.settings-grid {
  display: grid;
  gap: var(--space-4);
  max-width: 920px;
}

.settings-section {
  padding: var(--space-5);
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.section-head h2 {
  font-size: 16px;
  letter-spacing: -0.01em;
}

.section-head p {
  margin-top: 2px;
  font-size: 12.5px;
  color: var(--color-muted-foreground);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.inline-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.test-result {
  font-size: 13px;
  font-weight: 600;
}

.test-result.is-ok {
  color: var(--color-success);
}

.test-result.is-error {
  color: var(--color-destructive);
}

.theme-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.theme-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.theme-option input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.theme-option:has(input:checked) {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 16%, transparent);
}

.theme-option:has(input:focus-visible) {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

.theme-preview {
  width: 100%;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: 7px;
}

.theme-preview-light {
  background: linear-gradient(135deg, #ffffff 0 50%, #f8fafc 50% 100%);
}

.theme-preview-dark {
  background: linear-gradient(135deg, #111c2e 0 50%, #0b1220 50% 100%);
}

.theme-preview-system {
  background: linear-gradient(90deg, #ffffff 0 50%, #0b1220 50% 100%);
}

.save-bar {
  position: sticky;
  inset-block-end: var(--space-4);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-card) 92%, transparent);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.save-bar .hint {
  margin: 0;
}

/* ---------------------------------------------------------------- dialog */
.dialog {
  border: none;
  padding: 0;
  background: transparent;
  width: calc(100% - 32px);
  max-width: 430px;
}

.dialog::backdrop {
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
}

.dialog-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-card);
  box-shadow: var(--shadow-lg);
}

.dialog-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-muted);
  color: var(--color-muted-foreground);
}

.dialog-icon.danger {
  background: var(--color-danger-bg);
  color: var(--color-destructive);
}

.dialog-card h2 {
  font-size: 17px;
}

.dialog-card p {
  font-size: 13px;
  color: var(--color-muted-foreground);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ----------------------------------------------------------------- toast */
.toast-region {
  position: fixed;
  inset-block-end: 20px;
  inset-inline-end: 20px;
  z-index: 1000;
  display: grid;
  gap: 8px;
  width: min(360px, calc(100vw - 32px));
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-inline-start: 3px solid var(--color-accent);
  border-radius: 10px;
  background: var(--color-card);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  animation: toast-in 200ms ease;
}

.toast-success {
  border-inline-start-color: var(--color-success);
}

.toast-error {
  border-inline-start-color: var(--color-destructive);
}

.toast .icon {
  margin-top: 1px;
}

/* ------------------------------------------------------------- utilities */
[hidden] {
  display: none !important;
}

.cell-hide-sm {
  white-space: nowrap;
}

/* ------------------------------------------------------------ animations */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes bounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  30% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .chat-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 228px;
  }

  .main-content,
  .topbar,
  .app-footer {
    padding-inline: var(--space-4);
  }

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

  .chat-layout {
    grid-template-columns: 1fr;
  }

  .chat-side {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chat-panel {
    height: calc(100dvh - 128px);
    min-height: 480px;
  }
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    width: min(300px, 84vw);
    transform: translateX(-100%);
    transition: transform 220ms ease;
    box-shadow: var(--shadow-lg);
  }

  [dir="rtl"] .sidebar {
    transform: translateX(100%);
  }

  .sidebar.is-open,
  [dir="rtl"] .sidebar.is-open {
    transform: translateX(0);
  }

  .menu-btn {
    display: inline-grid;
  }

  .topbar {
    gap: var(--space-2);
  }

  .page-heading p {
    display: none;
  }
}

@media (max-width: 720px) {
  .main-content {
    padding: var(--space-4);
  }

  .hero {
    grid-template-columns: 1fr;
    padding: var(--space-5);
  }

  .hero-visual {
    display: none;
  }

  .stat-grid,
  .doc-stats,
  .form-grid,
  .theme-options {
    grid-template-columns: 1fr;
  }

  .doc-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .theme-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .chat-side {
    grid-template-columns: 1fr;
  }

  .chat-panel-head {
    align-items: stretch;
  }

  .chat-head-actions {
    width: 100%;
    justify-content: space-between;
    gap: 6px;
  }

  .chat-head-actions .select-with-icon {
    max-width: 150px;
  }

  .cell-hide-sm {
    display: none;
  }

  .message-body {
    max-width: 92%;
  }

  .save-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .save-bar .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .topbar-actions .select-with-icon {
    max-width: 120px;
  }

  .topbar-actions .select {
    text-overflow: ellipsis;
  }

  .card,
  .settings-section,
  .docs-card {
    padding: var(--space-4);
  }

  .hero h2 {
    font-size: 27px;
  }

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

  .theme-options {
    grid-template-columns: 1fr;
  }

  .theme-option {
    flex-direction: row;
    justify-content: flex-start;
  }

  .theme-preview {
    width: 48px;
    height: 32px;
    flex-shrink: 0;
  }

  .composer-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .composer-bar .btn {
    width: 100%;
  }

  .doc-name-text {
    max-width: 11ch;
  }

  .table th,
  .table td {
    padding: 8px 9px;
  }

  .doc-name {
    gap: 7px;
  }

  .file-chip {
    width: 26px;
    height: 26px;
  }

  .row-actions {
    gap: 2px;
  }

  .cell-actions .icon-btn.btn-sm {
    width: 28px;
    height: 28px;
  }

  #clear-chat {
    width: 36px;
    padding: 0;
  }

  #clear-chat span {
    display: none;
  }
}

/* --------------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------------------------- @mention picker & Auto-RTL */
#chat-input:dir(rtl),
.message-content:dir(rtl) {
  text-align: right;
  font-family: var(--font-arabic);
  line-height: 1.75;
}

.composer-input-wrap {
  position: relative;
  width: 100%;
}

.mention-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mention-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
  font-size: 12.5px;
  font-weight: 700;
}

.mention-remove {
  border: none;
  background: transparent;
  color: inherit;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  opacity: 0.75;
}

.mention-remove:hover {
  opacity: 1;
}

.mention-menu {
  position: absolute;
  inset-block-end: calc(100% + 8px);
  inset-inline-start: 0;
  z-index: 60;
  width: min(360px, 100%);
  max-height: 220px;
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  box-shadow: var(--shadow-lg);
}

.mention-option {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--color-foreground);
  font-size: 13px;
  font-weight: 600;
  text-align: start;
  cursor: pointer;
}

.mention-option:hover,
.mention-option.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.mention-option-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------------------------------------- AI Brand Avatar & Neural Loader */
.brand-mark {
  background: linear-gradient(135deg, var(--color-accent) 0%, #4f46e5 100%);
  box-shadow: 0 4px 14px -3px color-mix(in srgb, var(--color-accent) 55%, transparent);
}

.message.is-assistant .message-avatar {
  background: linear-gradient(135deg, var(--color-accent) 0%, #4f46e5 100%);
  color: #ffffff;
  box-shadow: 0 3px 10px -2px color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.typing {
  padding: 6px var(--space-5) 14px;
}

.ai-thinking {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px 8px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--color-accent) 28%, var(--color-border));
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-accent-soft) 55%, var(--color-card)) 0%,
    var(--color-card) 100%
  );
  box-shadow: 0 6px 20px -8px color-mix(in srgb, var(--color-accent) 35%, transparent);
}

.ai-thinking-sm {
  padding: 4px 10px 4px 6px;
  gap: 9px;
  border: none;
  background: transparent;
  box-shadow: none;
}

.ai-orb {
  position: relative;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.ai-thinking-sm .ai-orb {
  width: 24px;
  height: 24px;
}

.ai-orb-halo {
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 40%, transparent) 0%, transparent 70%);
  animation: ai-pulse-halo 2s ease-in-out infinite;
}

.ai-orb-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.ai-orb-ring {
  transform-origin: 18px 18px;
  opacity: 0.55;
  animation: ai-spin-cw 6s linear infinite;
}

.ai-orb-orbit {
  transform-origin: 18px 18px;
  opacity: 0.85;
  animation: ai-spin-ccw 3.2s linear infinite;
}

.ai-orb-star {
  transform-origin: 18px 18px;
  animation: ai-star-breathe 2s ease-in-out infinite;
}

.ai-orb-node {
  transform-origin: 18px 18px;
  animation: ai-spin-cw 2.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.ai-thinking-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 190px;
}

.ai-thinking-text {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(
    90deg,
    var(--color-foreground) 0%,
    var(--color-accent) 50%,
    var(--color-foreground) 100%
  );
  background-size: 200% auto;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  animation: ai-text-shimmer 2.4s linear infinite;
}

.ai-scan-bar {
  position: relative;
  height: 2.5px;
  width: 100%;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent) 18%, transparent);
  overflow: hidden;
}

.ai-scan-bar::after {
  content: "";
  position: absolute;
  inset-block: 0;
  width: 45%;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--color-accent), #6366f1, transparent);
  animation: ai-scan-slide 1.5s ease-in-out infinite;
}

@keyframes ai-spin-cw {
  to { transform: rotate(360deg); }
}

@keyframes ai-spin-ccw {
  to { transform: rotate(-360deg); }
}

@keyframes ai-star-breathe {
  0%, 100% { transform: scale(0.86) rotate(0deg); }
  50% { transform: scale(1.12) rotate(15deg); }
}

@keyframes ai-pulse-halo {
  0%, 100% { transform: scale(0.85); opacity: 0.45; }
  50% { transform: scale(1.3); opacity: 0.95; }
}

@keyframes ai-text-shimmer {
  to { background-position: 200% center; }
}

@keyframes ai-scan-slide {
  0% { inset-inline-start: -45%; }
  100% { inset-inline-start: 100%; }
}

/* ---------------------------------------- Document Source Mode Cards */
.source-mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.source-mode-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.source-mode-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-accent);
  flex-shrink: 0;
  cursor: pointer;
}

.source-mode-card:has(input:checked) {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent-soft) 35%, var(--color-card));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 16%, transparent);
}

.source-mode-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.source-mode-body strong {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
}

.source-mode-body .hint {
  margin: 0;
}

.path-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.path-input-row .input {
  flex: 1;
}

@media (max-width: 720px) {
  .source-mode-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------- Expandable Folder & Subfile Rows */
.doc-folder-row {
  cursor: pointer;
  user-select: none;
  background: color-mix(in srgb, var(--color-accent-soft) 18%, var(--color-card));
  transition: background var(--transition);
}

.doc-folder-row:hover {
  background: color-mix(in srgb, var(--color-accent-soft) 38%, var(--color-card)) !important;
}

.folder-chevron-wrap {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  color: var(--color-muted-foreground);
}

.folder-chevron {
  transition: transform 180ms ease;
}

.doc-folder-row.is-expanded .folder-chevron {
  transform: rotate(90deg);
  color: var(--color-accent);
}

[dir="rtl"] .folder-chevron {
  transform: scaleX(-1);
}

[dir="rtl"] .doc-folder-row.is-expanded .folder-chevron {
  transform: scaleX(-1) rotate(90deg);
}

.folder-chip {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.folder-title {
  font-weight: 700;
}

.folder-count-pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-muted);
  color: var(--color-muted-foreground);
  font-size: 11px;
  font-weight: 700;
}

.doc-subrow {
  background: color-mix(in srgb, var(--color-muted) 22%, var(--color-card));
}

.doc-name.is-subfile {
  padding-inline-start: 28px;
}

.subfile-branch {
  width: 12px;
  height: 14px;
  border-inline-start: 1.5px solid var(--color-border);
  border-bottom: 1.5px solid var(--color-border);
  border-end-start-radius: 4px;
  margin-top: -6px;
  flex-shrink: 0;
}

/* ---------------------------------------- Table Search & Pagination */
.docs-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.docs-search-input {
  max-width: 340px;
}

.table-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: 10px 14px;
  border-top: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-muted) 35%, var(--color-card));
  font-size: 12.5px;
}

.pagination-size {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted-foreground);
  font-weight: 600;
}

.pagination-select {
  width: 72px;
  min-height: 30px;
  padding: 3px 8px;
}

.pagination-info {
  color: var(--color-muted-foreground);
  font-variant-numeric: tabular-nums;
}

.pagination-controls {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.page-btn {
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  border: 1px solid var(--color-border);
  border-radius: 7px;
  background: var(--color-card);
  color: var(--color-foreground);
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.page-btn:hover:not(:disabled) {
  background: var(--color-muted);
  border-color: var(--color-accent);
}

.page-btn.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-on-accent);
}

.page-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.page-dots {
  padding: 0 4px;
  color: var(--color-muted-foreground);
}

/* ---------------------------------------- Structured @Mention Palette */
.mention-menu {
  width: min(440px, 100%);
  max-height: 300px;
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mention-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-muted) 45%, var(--color-card));
  font-size: 11.5px;
  font-weight: 700;
  color: var(--color-muted-foreground);
}

.mention-shortcuts {
  font-weight: 500;
  opacity: 0.8;
}

.mention-back-btn,
.mention-use-folder-btn {
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-card);
  color: var(--color-foreground);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
}

.mention-use-folder-btn {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 35%, transparent);
}

.mention-header-folder {
  color: var(--color-foreground);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mention-list-body {
  overflow-y: auto;
  max-height: 250px;
  padding: 6px;
}

.mention-section-label {
  padding: 6px 8px 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted-foreground);
}

.mention-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
}

.mention-option-main {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}

.mention-drill-btn {
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-card);
  color: var(--color-muted-foreground);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
}

.mention-drill-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.mention-in-folder {
  margin-inline-start: auto;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-muted-foreground);
  white-space: nowrap;
}

.ext-badge {
  display: inline-grid;
  place-items: center;
  min-width: 36px;
  padding: 2px 5px;
  border-radius: 5px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.ext-pdf {
  background: var(--color-danger-bg);
  color: var(--color-destructive);
}

.ext-sheet {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.ext-doc {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.ext-default {
  background: var(--color-muted);
  color: var(--color-muted-foreground);
}