/* ================================================================
   SauerlandAI — Shared Theme System (sai-theme.css)
   Version: 1.0 | 2026-03-21
   3-Tier Design Token Architecture:
     Tier 1: Primitives (raw values, never used in components)
     Tier 2: Semantic (purpose-based, used by components)
     Tier 3: Component (scoped per component)
   ================================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ================================================================
   TIER 1: PRIMITIVE TOKENS
   Raw values — never reference these directly in components.
   ================================================================ */
:root {
  /* ── Color Scales ── */
  --sai-color-slate-50:   #f8fafc;
  --sai-color-slate-100:  #f1f5f9;
  --sai-color-slate-200:  #e2e8f0;
  --sai-color-slate-300:  #cbd5e1;
  --sai-color-slate-400:  #94a3b8;
  --sai-color-slate-500:  #64748b;
  --sai-color-slate-600:  #475569;
  --sai-color-slate-700:  #334155;
  --sai-color-slate-800:  #1e293b;
  --sai-color-slate-900:  #0f172a;

  --sai-color-blue-50:    #eff6ff;
  --sai-color-blue-100:   #dbeafe;
  --sai-color-blue-200:   #bfdbfe;
  --sai-color-blue-300:   #93c5fd;
  --sai-color-blue-400:   #60a5fa;
  --sai-color-blue-500:   #3b82f6;
  --sai-color-blue-600:   #2563eb;
  --sai-color-blue-700:   #1d4ed8;
  --sai-color-blue-800:   #1e40af;
  --sai-color-blue-900:   #1e3a8a;

  --sai-color-teal-50:    #f0fdfa;
  --sai-color-teal-100:   #ccfbf1;
  --sai-color-teal-200:   #99f6e4;
  --sai-color-teal-300:   #5eead4;
  --sai-color-teal-400:   #2dd4bf;
  --sai-color-teal-500:   #14b8a6;
  --sai-color-teal-600:   #0d9488;
  --sai-color-teal-700:   #0f766e;
  --sai-color-teal-800:   #115e59;

  --sai-color-green-50:   #f0fdf4;
  --sai-color-green-100:  #dcfce7;
  --sai-color-green-500:  #22c55e;
  --sai-color-green-600:  #16a34a;
  --sai-color-green-700:  #15803d;

  --sai-color-amber-50:   #fffbeb;
  --sai-color-amber-100:  #fef3c7;
  --sai-color-amber-500:  #f59e0b;
  --sai-color-amber-600:  #d97706;

  --sai-color-red-50:     #fef2f2;
  --sai-color-red-100:    #fee2e2;
  --sai-color-red-500:    #ef4444;
  --sai-color-red-600:    #dc2626;

  --sai-color-purple-50:  #f3e8fd;
  --sai-color-purple-500: #6c32a9;
  --sai-color-purple-600: #5b21b6;

  --sai-color-indigo-500: #6366f1;

  /* ── Spacing Scale (8px base) ── */
  --sai-space-0:   0;
  --sai-space-1:   4px;
  --sai-space-2:   8px;
  --sai-space-3:   12px;
  --sai-space-4:   16px;
  --sai-space-5:   20px;
  --sai-space-6:   24px;
  --sai-space-8:   32px;
  --sai-space-10:  40px;
  --sai-space-12:  48px;
  --sai-space-16:  64px;

  /* ── Border Radius ── */
  --sai-radius-sm:   4px;
  --sai-radius-md:   6px;
  --sai-radius-lg:   8px;
  --sai-radius-xl:   12px;
  --sai-radius-full: 9999px;

  /* ── Typography ── */
  --sai-font-sans: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --sai-font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;

  /* ── Type Scale (Major Third 1.25) ── */
  --sai-text-xs:   11px;
  --sai-text-sm:   13px;
  --sai-text-base: 14px;
  --sai-text-md:   16px;
  --sai-text-lg:   20px;
  --sai-text-xl:   24px;
  --sai-text-2xl:  30px;
  --sai-text-3xl:  36px;

  /* ── Breakpoints ── */
  --sai-bp-sm:   640px;
  --sai-bp-md:   768px;
  --sai-bp-lg:   1024px;
  --sai-bp-xl:   1280px;
  --sai-bp-2xl:  1536px;

  /* ── Transitions ── */
  --sai-transition-fast:   100ms ease;
  --sai-transition:        150ms ease;
  --sai-transition-smooth: 200ms ease;
  --sai-transition-slow:   300ms ease;

  /* ── Pipeline Phase Colors ── */
  --sai-phase-nervenring:    #E8F1FD;
  --sai-phase-resonanz:      #E6F4EA;
  --sai-phase-echoortung:    #FFF3E0;
  --sai-phase-battle:        #FDEAEA;
  --sai-phase-magnetfeld:    #F3E8FD;
  --sai-phase-embodied:      #E0F7FA;
  --sai-phase-llm:           #E8F1FD;
  --sai-phase-immunsystem:   #E6F4EA;
  --sai-phase-schwarm:       #FFF8E1;
  --sai-phase-zentralhirn:   #0070F2;

  /* ── Brand ── */
  --sai-brand-primary: #3D8B50;
  --sai-brand-accent:  #009999;
  --sai-brand-warm:    #E76500;

  /* ── Styleguide Aliases (SAI_STYLEGUIDE.md §2.1) ── */
  --sai-primary:       #3D8B50;
  --sai-primary-hover: #2D7A40;
  --sai-primary-light: #4CAF62;
  --sai-primary-alpha: rgba(61, 139, 80, 0.12);
  --sai-bg:            #EFF5EF;
  --sai-bg-alt:        #E8F0E8;
  --sai-surface:       rgba(255, 255, 255, 0.75);
  --sai-surface-solid: #FFFFFF;
  --sai-surface-hover: rgba(255, 255, 255, 0.90);
  --sai-text:          #1E293B;
  --sai-text-secondary-alias: #475569;
  --sai-muted:         #64748B;
  --sai-border:        #CBD5E1;
  --sai-border-focus:  #3D8B50;
  --sai-success:       #22C55E;
  --sai-success-bg:    rgba(34, 197, 94, 0.10);
  --sai-warning:       #EAB308;
  --sai-warning-bg:    rgba(234, 179, 8, 0.10);
  --sai-error:         #EF4444;
  --sai-error-bg:      rgba(239, 68, 68, 0.10);
  --sai-info:          #3B82F6;
  --sai-info-bg:       rgba(59, 130, 246, 0.10);
  --sai-shadow-glow:   0 0 20px rgba(61,139,80,0.15);
}


/* ================================================================
   TIER 2: SEMANTIC TOKENS — LIGHT THEME (default)
   Purpose-based. Components reference these.
   ================================================================ */
:root,
[data-theme="light"] {
  /* ── Backgrounds ── */
  --sai-bg-page:           #EFF5EF;
  --sai-bg-surface:        #FFFFFF;
  --sai-bg-surface-alt:    #E8F0E8;
  --sai-bg-surface-raised: #FFFFFF;
  --sai-bg-surface-sunken: #E8F0E8;
  --sai-bg-elevated:       #FFFFFF;
  --sai-bg-inset:          #E4EDE4;
  --sai-bg-hover:          #E0EBE0;
  --sai-bg-interactive:    #0A6ED1;
  --sai-bg-interactive-hover: #085EB5;

  /* ── Text ── */
  --sai-text-primary:   #1D2D3E;
  --sai-text-secondary: #5B6B7D;
  --sai-text-tertiary:  #8899AA;
  --sai-text-inverse:   #FFFFFF;
  --sai-text-link:      #0070F2;
  --sai-text-link-hover:#0057B8;
  --sai-text-on-interactive: #FFFFFF;

  /* ── Borders ── */
  --sai-border-light:   #DEE2E6;
  --sai-border-default: #DEE2E6;
  --sai-border-medium:  #C4CDD5;
  --sai-border-strong:  #8899AA;
  --sai-border-focus:   #0070F2;
  --sai-border-interactive: var(--sai-color-teal-500);

  /* ── Semantic Status ── */
  --sai-success-bg:     var(--sai-color-green-50);
  --sai-success-border: var(--sai-color-green-600);
  --sai-success-text:   var(--sai-color-green-700);

  --sai-warning-bg:     var(--sai-color-amber-50);
  --sai-warning-border: var(--sai-color-amber-600);
  --sai-warning-text:   var(--sai-color-amber-600);

  --sai-error-bg:       var(--sai-color-red-50);
  --sai-error-border:   var(--sai-color-red-600);
  --sai-error-text:     var(--sai-color-red-600);

  --sai-info-bg:        var(--sai-color-blue-50);
  --sai-info-border:    var(--sai-color-blue-600);
  --sai-info-text:      var(--sai-color-blue-700);

  /* ── Shadows ── */
  --sai-shadow-sm:  0 1px 3px rgba(29,45,62,0.08);
  --sai-shadow-md:  0 4px 12px rgba(29,45,62,0.10);
  --sai-shadow-lg:  0 8px 24px rgba(29,45,62,0.12);
  --sai-shadow-xl:  0 16px 48px rgba(29,45,62,0.16);

  /* ── Scrollbar ── */
  --sai-scrollbar-track: transparent;
  --sai-scrollbar-thumb: var(--sai-color-slate-300);
  --sai-scrollbar-thumb-hover: var(--sai-color-slate-400);
}


/* ================================================================
   TIER 2: DARK THEME OVERRIDES
   ================================================================ */
[data-theme="dark"] {
  --sai-bg-page:           #0a0e1a;
  --sai-bg-surface:        #0f1729;
  --sai-bg-surface-alt:    #141d32;
  --sai-bg-surface-raised: #1a2540;
  --sai-bg-surface-sunken: #080c16;
  --sai-bg-elevated:       #141d32;
  --sai-bg-inset:          #0b1121;
  --sai-bg-hover:          rgba(20,184,166,0.06);
  --sai-bg-interactive:    var(--sai-color-teal-600);
  --sai-bg-interactive-hover: var(--sai-color-teal-700);

  --sai-text-primary:   #e2e8f0;
  --sai-text-secondary: #94a3b8;
  --sai-text-tertiary:  #64748b;
  --sai-text-inverse:   #0f172a;
  --sai-text-link:      var(--sai-color-teal-400);
  --sai-text-link-hover:var(--sai-color-teal-300);
  --sai-text-on-interactive: #FFFFFF;

  --sai-border-light:   #1a2744;
  --sai-border-default: #1a2744;
  --sai-border-medium:  #2a3f65;
  --sai-border-strong:  #3b5280;
  --sai-border-focus:   var(--sai-color-teal-500);

  --sai-shadow-sm:  0 1px 3px rgba(0,0,0,0.3);
  --sai-shadow-md:  0 4px 12px rgba(0,0,0,0.4);
  --sai-shadow-lg:  0 8px 24px rgba(0,0,0,0.5);
  --sai-shadow-xl:  0 16px 48px rgba(0,0,0,0.6);

  --sai-scrollbar-track: transparent;
  --sai-scrollbar-thumb: #2a3654;
  --sai-scrollbar-thumb-hover: #3b4d6e;
}

/* Respect prefers-color-scheme when no explicit data-theme is set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --sai-bg-page:           #0a0e1a;
    --sai-bg-surface:        #0f1729;
    --sai-bg-surface-alt:    #141d32;
    --sai-bg-surface-raised: #1a2540;
    --sai-bg-surface-sunken: #080c16;
    --sai-bg-elevated:       #141d32;
    --sai-bg-inset:          #0b1121;
    --sai-bg-hover:          rgba(20,184,166,0.06);
    --sai-text-primary:      #e2e8f0;
    --sai-text-secondary:    #94a3b8;
    --sai-text-tertiary:     #64748b;
    --sai-text-inverse:      #0f172a;
    --sai-border-light:      #1a2744;
    --sai-border-default:    #1a2744;
    --sai-border-medium:     #2a3f65;
    --sai-shadow-sm:         0 1px 3px rgba(0,0,0,0.3);
    --sai-shadow-md:         0 4px 12px rgba(0,0,0,0.4);
    --sai-scrollbar-thumb:   #2a3654;
  }
}


/* ================================================================
   TIER 3: COMPONENT TOKENS
   Scoped per component, reference semantic tokens.
   ================================================================ */
:root {
  /* ── Topbar ── */
  --sai-topbar-height:  56px;
  --sai-topbar-bg:      var(--sai-bg-surface);
  --sai-topbar-border:  var(--sai-border-light);
  --sai-topbar-shadow:  var(--sai-shadow-sm);

  /* ── Sidebar ── */
  --sai-sidebar-width:  280px;
  --sai-sidebar-bg:     var(--sai-bg-surface);
  --sai-sidebar-border: var(--sai-border-light);

  /* ── Card ── */
  --sai-card-bg:        var(--sai-bg-surface);
  --sai-card-border:    var(--sai-border-light);
  --sai-card-shadow:    var(--sai-shadow-sm);
  --sai-card-radius:    var(--sai-radius-lg);
  --sai-card-padding:   var(--sai-space-5);

  /* ── Button ── */
  --sai-btn-primary-bg:     var(--sai-bg-interactive);
  --sai-btn-primary-hover:  var(--sai-bg-interactive-hover);
  --sai-btn-primary-text:   var(--sai-text-on-interactive);
  --sai-btn-radius:         var(--sai-radius-md);

  /* ── Input ── */
  --sai-input-bg:           var(--sai-bg-surface);
  --sai-input-border:       var(--sai-border-medium);
  --sai-input-focus-border: var(--sai-border-focus);
  --sai-input-radius:       var(--sai-radius-md);

  /* ── Chat ── */
  --sai-chat-user-bg:       var(--sai-bg-interactive);
  --sai-chat-user-text:     var(--sai-text-on-interactive);
  --sai-chat-ai-bg:         var(--sai-bg-surface);
  --sai-chat-ai-border:     var(--sai-border-light);

  /* ── Modal ── */
  --sai-modal-bg:           var(--sai-bg-surface);
  --sai-modal-backdrop:     rgba(0,0,0,0.5);
  --sai-modal-radius:       var(--sai-radius-xl);
  --sai-modal-shadow:       var(--sai-shadow-xl);

  /* ── Toast ── */
  --sai-toast-bg:           var(--sai-bg-surface);
  --sai-toast-shadow:       var(--sai-shadow-lg);

  /* ── Status Bar ── */
  --sai-statusbar-height:   32px;
  --sai-statusbar-bg:       var(--sai-bg-surface);
  --sai-statusbar-border:   var(--sai-border-light);
}


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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--sai-font-sans);
  font-size: var(--sai-text-base);
  line-height: 1.57;
  color: var(--sai-text-primary);
  background: var(--sai-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Scrollbars ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--sai-scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--sai-scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--sai-scrollbar-thumb-hover); }
::selection { background: var(--sai-bg-interactive); color: var(--sai-text-inverse); }

/* ── Typography ── */
h1 { font-size: var(--sai-text-xl);  font-weight: 600; line-height: 32px; letter-spacing: -0.02em; }
h2 { font-size: var(--sai-text-lg);  font-weight: 600; line-height: 28px; letter-spacing: -0.01em; }
h3 { font-size: var(--sai-text-md);  font-weight: 500; line-height: 24px; }
h4 { font-size: var(--sai-text-base); font-weight: 600; line-height: 22px; }

code, pre, .mono {
  font-family: var(--sai-font-mono);
  font-size: var(--sai-text-sm);
  line-height: 20px;
}

small, .caption {
  font-size: var(--sai-text-xs);
  line-height: 16px;
  color: var(--sai-text-tertiary);
}

a {
  color: var(--sai-text-link);
  text-decoration: none;
  transition: color var(--sai-transition);
}
a:hover { color: var(--sai-text-link-hover); }

/* ── Utility ── */
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }


/* ================================================================
   COMPONENT: TOPBAR (Shell Bar)
   ================================================================ */
.sai-topbar {
  height: var(--sai-topbar-height);
  background: var(--sai-topbar-bg);
  border-bottom: 1px solid var(--sai-topbar-border);
  box-shadow: var(--sai-topbar-shadow);
  display: flex;
  align-items: center;
  padding: 0 var(--sai-space-6);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}

.sai-topbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--sai-text-md);
  font-weight: 700;
  color: var(--sai-text-primary);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.sai-topbar-logo-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--sai-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--sai-bg-interactive), var(--sai-color-indigo-500));
  box-shadow: 0 2px 8px rgba(10,110,209,0.25);
}

.sai-topbar-logo .accent { color: var(--sai-bg-interactive); }

.sai-topbar-subtitle {
  font-size: var(--sai-text-xs);
  color: var(--sai-text-tertiary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.sai-topbar-nav {
  display: flex;
  gap: 4px;
  margin-left: var(--sai-space-8);
}

.sai-topbar-tab {
  padding: 8px 16px;
  border-radius: var(--sai-btn-radius);
  font-size: var(--sai-text-base);
  font-weight: 500;
  color: var(--sai-text-secondary);
  cursor: pointer;
  transition: all var(--sai-transition);
  border: none;
  background: transparent;
  font-family: var(--sai-font-sans);
}
.sai-topbar-tab:hover {
  background: var(--sai-bg-hover);
  color: var(--sai-text-primary);
}
.sai-topbar-tab.active {
  background: var(--sai-info-bg);
  color: var(--sai-bg-interactive);
}

.sai-topbar-spacer { flex: 1; }

.sai-topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--sai-space-2);
}

.sai-topbar-action {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--sai-radius-md);
  color: var(--sai-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--sai-transition);
}
.sai-topbar-action:hover {
  background: var(--sai-bg-hover);
  color: var(--sai-text-primary);
}


/* ================================================================
   COMPONENT: SIDEBAR
   ================================================================ */
.sai-sidebar {
  width: var(--sai-sidebar-width);
  background: var(--sai-sidebar-bg);
  border-right: 1px solid var(--sai-sidebar-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: width var(--sai-transition-smooth), opacity var(--sai-transition-smooth);
  z-index: 20;
}

.sai-sidebar.collapsed {
  width: 0;
  opacity: 0;
  pointer-events: none;
  border: none;
}

.sai-sidebar-header {
  padding: var(--sai-space-4) var(--sai-space-4) var(--sai-space-3);
  border-bottom: 1px solid var(--sai-border-light);
  flex-shrink: 0;
}

.sai-sidebar-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.sai-sidebar-section {
  padding: var(--sai-space-3) var(--sai-space-4);
  border-bottom: 1px solid var(--sai-border-light);
}
.sai-sidebar-section:last-child { border-bottom: none; }

.sai-sidebar-label {
  font-size: var(--sai-text-xs);
  font-weight: 700;
  color: var(--sai-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sai-space-2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sai-sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: var(--sai-text-base);
  color: var(--sai-text-secondary);
  cursor: pointer;
  transition: all var(--sai-transition);
  border-radius: var(--sai-radius-md);
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: var(--sai-font-sans);
}
.sai-sidebar-item:hover {
  background: var(--sai-bg-hover);
  color: var(--sai-text-primary);
}
.sai-sidebar-item.active {
  background: var(--sai-info-bg);
  color: var(--sai-bg-interactive);
  font-weight: 500;
}

.sai-sidebar-search {
  width: 100%;
  background: var(--sai-bg-surface-alt);
  border: 1px solid var(--sai-border-light);
  border-radius: var(--sai-input-radius);
  color: var(--sai-text-primary);
  padding: 8px 12px 8px 32px;
  font-size: var(--sai-text-sm);
  font-family: var(--sai-font-sans);
  outline: none;
  transition: border-color var(--sai-transition);
}
.sai-sidebar-search:focus { border-color: var(--sai-border-focus); }
.sai-sidebar-search::placeholder { color: var(--sai-text-tertiary); }


/* ================================================================
   COMPONENT: CHAT PANEL
   ================================================================ */
.sai-chat-panel {
  display: flex;
  flex-direction: column;
  background: var(--sai-bg-surface);
  min-height: 0;
  flex: 1;
}

.sai-chat-header {
  padding: var(--sai-space-2) var(--sai-space-4);
  border-bottom: 1px solid var(--sai-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.sai-chat-header-title {
  font-size: var(--sai-text-xs);
  font-weight: 700;
  color: var(--sai-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sai-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--sai-space-3) var(--sai-space-4);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Message Bubbles */
.sai-msg {
  display: flex;
  flex-direction: column;
  max-width: 88%;
  animation: sai-msg-in 0.25s ease;
}
@keyframes sai-msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sai-msg.user { align-self: flex-end; }
.sai-msg.ai   { align-self: flex-start; }

.sai-msg-bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: var(--sai-text-sm);
  line-height: 1.55;
  word-wrap: break-word;
}
.sai-msg.user .sai-msg-bubble {
  background: var(--sai-chat-user-bg);
  color: var(--sai-chat-user-text);
  border-bottom-right-radius: 4px;
}
.sai-msg.ai .sai-msg-bubble {
  background: var(--sai-chat-ai-bg);
  border: 1px solid var(--sai-chat-ai-border);
  color: var(--sai-text-primary);
  border-bottom-left-radius: 4px;
  box-shadow: var(--sai-shadow-sm);
}

.sai-msg-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  padding: 0 4px;
}
.sai-msg.user .sai-msg-meta { justify-content: flex-end; }
.sai-msg-time { font-size: 10px; color: var(--sai-text-tertiary); }

/* Typing Indicator */
.sai-typing {
  display: none;
  align-self: flex-start;
  padding: 10px 14px;
  background: var(--sai-bg-surface-alt);
  border: 1px solid var(--sai-border-light);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}
.sai-typing.active { display: flex; }
.sai-typing-dots { display: flex; gap: 4px; align-items: center; }
.sai-typing-dots span {
  width: 6px;
  height: 6px;
  background: var(--sai-text-tertiary);
  border-radius: 50%;
  animation: sai-typing-bounce 1.2s infinite;
}
.sai-typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.sai-typing-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes sai-typing-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%           { transform: translateY(-4px); }
}

/* Chat Input Area */
.sai-chat-input-area {
  padding: var(--sai-space-3) var(--sai-space-4);
  border-top: 1px solid var(--sai-border-light);
  flex-shrink: 0;
}

.sai-chat-input-wrap {
  display: flex;
  gap: 8px;
  background: var(--sai-input-bg);
  border: 1px solid var(--sai-input-border);
  border-radius: var(--sai-radius-lg);
  padding: 4px 4px 4px 14px;
  transition: border-color var(--sai-transition);
  align-items: flex-end;
}
.sai-chat-input-wrap:focus-within {
  border-color: var(--sai-input-focus-border);
  box-shadow: 0 0 0 3px var(--sai-info-bg);
}

.sai-chat-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--sai-text-primary);
  font-size: var(--sai-text-sm);
  font-family: var(--sai-font-sans);
  outline: none;
  resize: none;
  min-height: 20px;
  max-height: 100px;
  padding: 6px 0;
  line-height: 1.4;
}
.sai-chat-input::placeholder { color: var(--sai-text-tertiary); }

.sai-chat-send {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  background: var(--sai-btn-primary-bg);
  border: none;
  border-radius: var(--sai-radius-md);
  color: var(--sai-btn-primary-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: all var(--sai-transition);
}
.sai-chat-send:hover { background: var(--sai-btn-primary-hover); transform: scale(1.05); }
.sai-chat-send:active { transform: scale(0.95); }
.sai-chat-send:disabled { opacity: 0.4; cursor: default; transform: none; }

.sai-chat-hint {
  font-size: 10px;
  color: var(--sai-text-tertiary);
  text-align: center;
  margin-top: 4px;
}


/* ================================================================
   COMPONENT: CARD
   ================================================================ */
.sai-card {
  background: var(--sai-card-bg);
  border: 1px solid var(--sai-card-border);
  border-radius: var(--sai-card-radius);
  padding: var(--sai-card-padding);
  box-shadow: var(--sai-card-shadow);
  transition: box-shadow var(--sai-transition-smooth);
}
.sai-card:hover { box-shadow: var(--sai-shadow-md); }

.sai-card-header {
  font-size: var(--sai-text-md);
  font-weight: 500;
  color: var(--sai-text-primary);
  margin-bottom: var(--sai-space-3);
  padding-bottom: var(--sai-space-3);
  border-bottom: 1px solid var(--sai-border-light);
}

.sai-card.elevated {
  box-shadow: var(--sai-shadow-md);
}
.sai-card.elevated:hover {
  box-shadow: var(--sai-shadow-lg);
}

.sai-card.interactive {
  cursor: pointer;
}
.sai-card.interactive:hover {
  border-color: var(--sai-border-medium);
}


/* ================================================================
   COMPONENT: BUTTON
   ================================================================ */
.sai-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--sai-btn-radius);
  font-size: var(--sai-text-base);
  font-weight: 500;
  font-family: var(--sai-font-sans);
  line-height: 20px;
  cursor: pointer;
  transition: all var(--sai-transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.sai-btn-primary {
  background: var(--sai-btn-primary-bg);
  color: var(--sai-btn-primary-text);
}
.sai-btn-primary:hover {
  background: var(--sai-btn-primary-hover);
  box-shadow: var(--sai-shadow-sm);
}
.sai-btn-primary:active { filter: brightness(0.9); }

.sai-btn-secondary {
  background: transparent;
  color: var(--sai-bg-interactive);
  border: 1px solid var(--sai-border-medium);
}
.sai-btn-secondary:hover {
  background: var(--sai-info-bg);
  border-color: var(--sai-bg-interactive);
}

.sai-btn-ghost {
  background: transparent;
  color: var(--sai-text-secondary);
}
.sai-btn-ghost:hover {
  background: var(--sai-bg-hover);
  color: var(--sai-text-primary);
}

.sai-btn-danger {
  background: var(--sai-error-border);
  color: var(--sai-text-inverse);
}
.sai-btn-danger:hover { filter: brightness(1.1); }

.sai-btn-sm { padding: 4px 12px; font-size: var(--sai-text-sm); }
.sai-btn-lg { padding: 12px 24px; font-size: var(--sai-text-md); }

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

.sai-btn:focus-visible {
  outline: 2px solid var(--sai-border-focus);
  outline-offset: 2px;
}


/* ================================================================
   COMPONENT: INPUT
   ================================================================ */
.sai-input {
  width: 100%;
  padding: 8px 12px;
  font-size: var(--sai-text-base);
  font-family: var(--sai-font-sans);
  line-height: 20px;
  color: var(--sai-text-primary);
  background: var(--sai-input-bg);
  border: 1px solid var(--sai-input-border);
  border-radius: var(--sai-input-radius);
  transition: border-color var(--sai-transition), box-shadow var(--sai-transition);
}
.sai-input::placeholder { color: var(--sai-text-tertiary); }
.sai-input:hover { border-color: var(--sai-border-strong); }
.sai-input:focus {
  outline: none;
  border-color: var(--sai-input-focus-border);
  box-shadow: 0 0 0 3px var(--sai-info-bg);
}
.sai-input.error { border-color: var(--sai-error-border); }
.sai-input.error:focus { box-shadow: 0 0 0 3px var(--sai-error-bg); }

.sai-select {
  width: 100%;
  padding: 8px 12px;
  font-size: var(--sai-text-base);
  font-family: var(--sai-font-sans);
  color: var(--sai-text-primary);
  background: var(--sai-input-bg);
  border: 1px solid var(--sai-input-border);
  border-radius: var(--sai-input-radius);
  cursor: pointer;
  outline: none;
  transition: border-color var(--sai-transition);
}
.sai-select:focus { border-color: var(--sai-input-focus-border); }


/* ================================================================
   COMPONENT: BADGE
   ================================================================ */
.sai-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: var(--sai-text-xs);
  font-weight: 600;
  line-height: 16px;
  border-radius: var(--sai-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* Status Badges — maps to SauerlandAI verification codes */
.sai-badge-proved {
  background: var(--sai-success-bg);
  color: var(--sai-success-text);
  border: 1px solid var(--sai-success-border);
}
.sai-badge-probable {
  background: var(--sai-info-bg);
  color: var(--sai-info-text);
  border: 1px solid var(--sai-info-border);
}
.sai-badge-korridor {
  background: var(--sai-warning-bg);
  color: var(--sai-warning-text);
  border: 1px solid var(--sai-warning-border);
}
.sai-badge-unknown {
  background: var(--sai-bg-inset);
  color: var(--sai-text-secondary);
  border: 1px solid var(--sai-border-light);
}
.sai-badge-false {
  background: var(--sai-error-bg);
  color: var(--sai-error-text);
  border: 1px solid var(--sai-error-border);
}
.sai-badge-goedel {
  background: var(--sai-color-purple-50);
  color: var(--sai-color-purple-500);
  border: 1px solid var(--sai-color-purple-500);
}

/* Semantic Badges */
.sai-badge-success { background: var(--sai-success-bg); color: var(--sai-success-text); }
.sai-badge-warning { background: var(--sai-warning-bg); color: var(--sai-warning-text); }
.sai-badge-error   { background: var(--sai-error-bg);   color: var(--sai-error-text);   }
.sai-badge-info    { background: var(--sai-info-bg);     color: var(--sai-info-text);    }
.sai-badge-neutral { background: var(--sai-bg-inset);    color: var(--sai-text-secondary); }


/* ================================================================
   COMPONENT: TABLE
   ================================================================ */
.sai-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--sai-text-base);
}
.sai-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: var(--sai-text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--sai-text-secondary);
  background: var(--sai-bg-surface-alt);
  border-bottom: 2px solid var(--sai-border-light);
  position: sticky;
  top: 0;
  z-index: 1;
}
.sai-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--sai-border-light);
  color: var(--sai-text-primary);
}
.sai-table tr:hover td { background: var(--sai-bg-hover); }
.sai-table tr.selected td { background: var(--sai-info-bg); }

.sai-table .num {
  font-family: var(--sai-font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}


/* ================================================================
   COMPONENT: MODAL
   ================================================================ */
.sai-modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--sai-modal-backdrop);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.sai-modal-backdrop.active { display: flex; }

.sai-modal {
  background: var(--sai-modal-bg);
  border-radius: var(--sai-modal-radius);
  box-shadow: var(--sai-modal-shadow);
  padding: var(--sai-space-6);
  max-width: 560px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  animation: sai-modal-in 0.2s ease;
}
@keyframes sai-modal-in {
  from { opacity: 0; transform: translateY(16px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.sai-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sai-space-4);
}
.sai-modal-title { font-size: var(--sai-text-lg); font-weight: 600; }
.sai-modal-close {
  width: 32px; height: 32px;
  border: none; background: transparent;
  border-radius: var(--sai-radius-md);
  cursor: pointer; font-size: 18px;
  color: var(--sai-text-tertiary);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--sai-transition);
}
.sai-modal-close:hover { background: var(--sai-bg-hover); color: var(--sai-text-primary); }


/* ================================================================
   COMPONENT: TOAST
   ================================================================ */
.sai-toast-container {
  position: fixed;
  bottom: var(--sai-space-6);
  right: var(--sai-space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column-reverse;
  gap: var(--sai-space-2);
}

.sai-toast {
  background: var(--sai-toast-bg);
  box-shadow: var(--sai-toast-shadow);
  border-radius: var(--sai-radius-lg);
  padding: var(--sai-space-3) var(--sai-space-4);
  display: flex;
  align-items: center;
  gap: var(--sai-space-3);
  min-width: 300px;
  max-width: 420px;
  border-left: 4px solid;
  animation: sai-toast-in 0.3s ease;
  font-size: var(--sai-text-sm);
}
@keyframes sai-toast-in {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}
.sai-toast-success { border-color: var(--sai-success-border); }
.sai-toast-error   { border-color: var(--sai-error-border); }
.sai-toast-warning { border-color: var(--sai-warning-border); }
.sai-toast-info    { border-color: var(--sai-info-border); }


/* ================================================================
   COMPONENT: TABS
   ================================================================ */
.sai-tabs {
  display: flex;
  border-bottom: 1px solid var(--sai-border-light);
  flex-shrink: 0;
  overflow-x: auto;
}

.sai-tab {
  flex: none;
  padding: 10px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--sai-text-tertiary);
  font-size: var(--sai-text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--sai-transition);
  font-family: var(--sai-font-sans);
  white-space: nowrap;
}
.sai-tab:hover { color: var(--sai-text-secondary); background: var(--sai-bg-hover); }
.sai-tab.active { color: var(--sai-bg-interactive); border-bottom-color: var(--sai-bg-interactive); }


/* ================================================================
   COMPONENT: PROGRESS
   ================================================================ */
.sai-progress {
  width: 100%;
  height: 8px;
  background: var(--sai-bg-inset);
  border-radius: var(--sai-radius-full);
  overflow: hidden;
}
.sai-progress-fill {
  height: 100%;
  border-radius: var(--sai-radius-full);
  background: var(--sai-bg-interactive);
  transition: width 0.5s ease;
}
.sai-progress-fill.success { background: var(--sai-success-border); }
.sai-progress-fill.warning { background: var(--sai-warning-border); }
.sai-progress-fill.error   { background: var(--sai-error-border); }


/* ================================================================
   COMPONENT: STATUS INDICATOR (Pipeline)
   ================================================================ */
.sai-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}
.sai-status-dot.online  { background: var(--sai-color-green-500); box-shadow: 0 0 6px rgba(34,197,94,0.4); }
.sai-status-dot.offline { background: var(--sai-color-red-500);   box-shadow: 0 0 6px rgba(239,68,68,0.3); }
.sai-status-dot.unknown { background: var(--sai-text-tertiary); }
.sai-status-dot.pulse   { animation: sai-pulse-dot 1s infinite; }
@keyframes sai-pulse-dot {
  0%, 100% { box-shadow: 0 0 4px rgba(34,197,94,0.3); }
  50%      { box-shadow: 0 0 10px rgba(34,197,94,0.7); }
}

/* Pipeline Dots */
.sai-pipeline-dots {
  display: flex;
  gap: 3px;
  align-items: center;
}
.sai-pipeline-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sai-border-light);
  transition: all 0.3s ease;
}
.sai-pipeline-dot.done    { background: var(--sai-bg-interactive); }
.sai-pipeline-dot.current {
  background: var(--sai-bg-interactive);
  animation: sai-pulse-dot 1s infinite;
}


/* ================================================================
   COMPONENT: DATENSCHUTZHINWEIS (DSGVO Footer)
   ================================================================ */
.sai-datenschutz {
  padding: 6px var(--sai-space-4);
  font-size: 10px;
  color: var(--sai-text-tertiary);
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--sai-bg-surface-alt);
  border-top: 1px solid var(--sai-border-light);
  flex-shrink: 0;
}
.sai-datenschutz-lock {
  font-size: 12px;
  opacity: 0.7;
}


/* ================================================================
   COMPONENT: STATUS BAR
   ================================================================ */
.sai-statusbar {
  height: var(--sai-statusbar-height);
  background: var(--sai-statusbar-bg);
  border-top: 1px solid var(--sai-statusbar-border);
  display: flex;
  align-items: center;
  padding: 0 var(--sai-space-4);
  gap: var(--sai-space-4);
  flex-shrink: 0;
  font-size: var(--sai-text-xs);
  z-index: 20;
}

.sai-sb-item {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--sai-text-tertiary);
  white-space: nowrap;
}

.sai-sb-separator {
  width: 1px;
  height: 16px;
  background: var(--sai-border-light);
  flex-shrink: 0;
}


/* ================================================================
   COMPONENT: ALERT
   ================================================================ */
.sai-alert {
  padding: var(--sai-space-3) var(--sai-space-4);
  border-radius: var(--sai-radius-md);
  border-left: 4px solid;
  font-size: var(--sai-text-base);
  display: flex;
  align-items: flex-start;
  gap: var(--sai-space-3);
}
.sai-alert-info    { background: var(--sai-info-bg);    border-color: var(--sai-info-border); }
.sai-alert-success { background: var(--sai-success-bg); border-color: var(--sai-success-border); }
.sai-alert-warning { background: var(--sai-warning-bg); border-color: var(--sai-warning-border); }
.sai-alert-error   { background: var(--sai-error-bg);   border-color: var(--sai-error-border); }


/* ================================================================
   ANIMATION: OCTOPUS TENTACLE LOADER (Brand Signature)
   ================================================================ */
.sai-loader {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 32px;
}

.sai-loader-tentacle {
  width: 4px;
  border-radius: 2px;
  background: var(--sai-bg-interactive);
  animation: sai-tentacle-wave 1.2s ease-in-out infinite;
}

.sai-loader-tentacle:nth-child(1) { animation-delay: 0ms;   height: 12px; }
.sai-loader-tentacle:nth-child(2) { animation-delay: 100ms; height: 16px; }
.sai-loader-tentacle:nth-child(3) { animation-delay: 200ms; height: 20px; }
.sai-loader-tentacle:nth-child(4) { animation-delay: 300ms; height: 24px; }
.sai-loader-tentacle:nth-child(5) { animation-delay: 400ms; height: 24px; }
.sai-loader-tentacle:nth-child(6) { animation-delay: 500ms; height: 20px; }
.sai-loader-tentacle:nth-child(7) { animation-delay: 600ms; height: 16px; }
.sai-loader-tentacle:nth-child(8) { animation-delay: 700ms; height: 12px; }

@keyframes sai-tentacle-wave {
  0%, 100% { transform: scaleY(1);   opacity: 0.6; }
  50%      { transform: scaleY(1.8); opacity: 1;   }
}

/* ================================================================
   LOGO PROGRESS BAR — Octopus-Tentakel Ladebalken
   Usage: <div class="sai-logo-progress" data-progress="65">
            <div class="sai-logo-head">SA</div>
            <div class="sai-logo-bar"><div class="sai-logo-fill"></div></div>
            <span class="sai-logo-pct">65%</span>
          </div>
   ================================================================ */
.sai-logo-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--sai-bg-surface, #fff);
  border-radius: var(--sai-radius-md, 8px);
  border: 1px solid var(--sai-border-default, #DEE2E6);
  transition: box-shadow 0.3s, transform 0.2s;
  cursor: default;
}
.sai-logo-progress:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transform: translateY(-1px);
}
.sai-logo-head {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3D8B50, #2A6B3A);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  animation: sai-head-pulse 2s ease-in-out infinite;
}
@keyframes sai-head-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(61,139,80,0.4); }
  50%      { box-shadow: 0 0 0 6px rgba(61,139,80,0); }
}
.sai-logo-bar {
  flex: 1;
  height: 6px;
  background: var(--sai-bg-inset, #E8EBF0);
  border-radius: 3px;
  overflow: hidden;
  min-width: 80px;
}
.sai-logo-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #3D8B50, #5CB870);
  border-radius: 3px;
  transition: width 0.4s ease;
  position: relative;
}
.sai-logo-fill::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: sai-bar-shimmer 1.5s ease-in-out infinite;
}
@keyframes sai-bar-shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}
.sai-logo-pct {
  font-size: var(--sai-text-xs, 11px);
  font-weight: 600;
  color: var(--sai-text-secondary, #5B6B7D);
  min-width: 32px;
  text-align: right;
}

/* Full-page loading overlay with octopus animation */
.sai-fullpage-loader {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.sai-fullpage-loader.active {
  opacity: 1;
  pointer-events: auto;
}
.sai-fullpage-loader .sai-loader {
  height: 48px;
  gap: 5px;
}
.sai-fullpage-loader .sai-loader-tentacle {
  width: 6px;
  border-radius: 3px;
}
.sai-fullpage-loader .sai-loader-msg {
  color: #fff;
  margin-top: 16px;
  font-size: var(--sai-text-sm, 13px);
}

/* Skeleton Shimmer */
.sai-skeleton {
  background: linear-gradient(90deg,
    var(--sai-bg-inset) 25%,
    var(--sai-bg-hover) 50%,
    var(--sai-bg-inset) 75%
  );
  background-size: 200% 100%;
  animation: sai-skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--sai-radius-sm);
}
@keyframes sai-skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}


/* ================================================================
   UTILITY: GERMAN NUMBER FORMATTING HELPERS
   ================================================================ */
.sai-num-de {
  font-family: var(--sai-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.sai-eur::after {
  content: ' \20AC';
  font-weight: 400;
  color: var(--sai-text-secondary);
}

.sai-paragraph-ref {
  font-family: var(--sai-font-mono);
  font-size: var(--sai-text-sm);
  color: var(--sai-text-link);
  cursor: pointer;
  transition: color var(--sai-transition);
}
.sai-paragraph-ref:hover { color: var(--sai-text-link-hover); text-decoration: underline; }


/* ================================================================
   LAYOUT: APP SHELL
   ================================================================ */
.sai-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.sai-app-body {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}


/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1280px) {
  :root {
    --sai-sidebar-width: 240px;
  }
}
@media (max-width: 1024px) {
  :root {
    --sai-sidebar-width: 220px;
  }
}
@media (max-width: 768px) {
  .sai-sidebar { display: none; }
  .sai-topbar-nav { display: none; }
}

/* ================================================================
   iOS SAFARI / PWA OPTIMIZATIONS
   ================================================================ */

/* ── Safe Area Insets (iPhone Notch / Dynamic Island) ── */
body {
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* Fixed elements (topbar, bottom nav) need safe-area awareness */
.sai-topbar {
  padding-top: env(safe-area-inset-top);
}

.sai-bottom-nav,
.sai-chat-input-wrap {
  padding-bottom: env(safe-area-inset-bottom);
}

/* ── Touch Optimizations ── */
*,
*::before,
*::after {
  -webkit-tap-highlight-color: transparent;
}

html {
  touch-action: manipulation; /* Prevents 300ms tap delay on iOS */
}

/* Prevent iOS text size adjustment */
body {
  -webkit-text-size-adjust: 100%;
}

/* Smooth momentum scrolling for scrollable containers */
.sai-sidebar,
.sai-chat-messages,
.sai-main-content {
  -webkit-overflow-scrolling: touch;
}

/* Standalone PWA mode: extra top padding for status bar */
@media (display-mode: standalone) {
  .sai-topbar {
    padding-top: env(safe-area-inset-top);
  }
  body {
    /* Prevent overscroll bounce in PWA */
    overscroll-behavior-y: none;
  }
}