/* ============================================================
   AI Portal — Design System
   Dark Mode · Glassmorphism · Premium UI
   ============================================================ */

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

/* ────────────────────────────────────────────────────────────
   CSS CUSTOM PROPERTIES (Design Tokens)
   ──────────────────────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-base:          #0a0e1a;
  --bg-surface:       #111827;
  --bg-elevated:      #1a2236;
  --bg-hover:         #1e2d45;

  /* Glass */
  --glass-bg:         rgba(255, 255, 255, 0.04);
  --glass-bg-hover:   rgba(255, 255, 255, 0.07);
  --glass-border:     rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);

  /* Primary Gradient */
  --primary-from:     #6366f1;
  --primary-to:       #8b5cf6;
  --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --primary-glow:     rgba(99, 102, 241, 0.35);

  /* Accent */
  --accent:           #06b6d4;
  --accent-dim:       rgba(6, 182, 212, 0.15);

  /* Text */
  --text-primary:     #f1f5f9;
  --text-secondary:   #94a3b8;
  --text-muted:       #64748b;
  --text-inverse:     #0a0e1a;

  /* Semantic */
  --success:          #10b981;
  --success-dim:      rgba(16, 185, 129, 0.15);
  --warning:          #f59e0b;
  --warning-dim:      rgba(245, 158, 11, 0.15);
  --error:            #ef4444;
  --error-dim:        rgba(239, 68, 68, 0.15);
  --info:             #3b82f6;
  --info-dim:         rgba(59, 130, 246, 0.15);

  /* Borders */
  --border:           rgba(255, 255, 255, 0.08);
  --border-strong:    rgba(255, 255, 255, 0.15);

  /* Shadows */
  --shadow-sm:        0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:        0 4px 16px rgba(0,0,0,0.5), 0 2px 6px rgba(0,0,0,0.3);
  --shadow-lg:        0 12px 40px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.4);
  --shadow-xl:        0 24px 64px rgba(0,0,0,0.7), 0 8px 24px rgba(0,0,0,0.5);
  --shadow-glow:      0 0 40px rgba(99, 102, 241, 0.2);

  /* Spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;

  /* Radii */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:  150ms cubic-bezier(0.4,0,0.2,1);
  --transition-base:  250ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow:  400ms cubic-bezier(0.4,0,0.2,1);

  /* Layout */
  --sidebar-width:    280px;
  --header-height:    60px;
  --input-area-height: auto;
}

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

/* ── Light mode (Phase 5.4) ──────────────────────────────────── */
:root[data-theme="light"] {
  --bg-base:          #f5f6fa;
  --bg-surface:       #ffffff;
  --bg-elevated:      #eef0f6;
  --bg-hover:         #e5e8f0;
  --glass-bg:         rgba(0, 0, 0, 0.03);
  --glass-bg-hover:   rgba(0, 0, 0, 0.06);
  --glass-border:     rgba(0, 0, 0, 0.08);
  --glass-border-hover: rgba(0, 0, 0, 0.15);
  --text-primary:     #1a1d2e;
  --text-secondary:   #4a5568;
  --text-muted:       #8896a9;
  --text-inverse:     #f5f6fa;
  --border:           rgba(0, 0, 0, 0.08);
  --border-strong:    rgba(0, 0, 0, 0.15);
  --shadow-sm:        0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.08);
  --shadow-md:        0 4px 16px rgba(0,0,0,.12), 0 2px 6px rgba(0,0,0,.08);
  --shadow-lg:        0 12px 40px rgba(0,0,0,.15), 0 4px 12px rgba(0,0,0,.1);
  --shadow-xl:        0 24px 64px rgba(0,0,0,.18), 0 8px 24px rgba(0,0,0,.1);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary-from);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--primary-to); }

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

/* ────────────────────────────────────────────────────────────
   SCROLLBAR STYLING
   ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.22); }
* { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.12) transparent; }

/* ────────────────────────────────────────────────────────────
   TYPOGRAPHY
   ──────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p { color: var(--text-secondary); line-height: 1.7; }

.text-muted    { color: var(--text-muted) !important; }
.text-secondary{ color: var(--text-secondary) !important; }
.text-success  { color: var(--success) !important; }
.text-warning  { color: var(--warning) !important; }
.text-error    { color: var(--error) !important; }
.text-accent   { color: var(--accent) !important; }

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ────────────────────────────────────────────────────────────
   GLASSMORPHISM PANEL
   ──────────────────────────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.glass-strong {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border: 1px solid var(--glass-border);
}

/* ────────────────────────────────────────────────────────────
   BUTTONS
   ──────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn:active::after { opacity: 0.08; }

/* Primary */
.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--primary-glow);
  filter: brightness(1.1);
}
.btn-primary:active { transform: translateY(0); }

/* Ghost */
.btn-ghost {
  background: var(--glass-bg);
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
}

/* Danger */
.btn-danger {
  background: var(--error-dim);
  color: var(--error);
  border: 1px solid rgba(239,68,68,0.25);
}
.btn-danger:hover {
  background: var(--error);
  color: #fff;
  box-shadow: 0 4px 15px rgba(239,68,68,0.35);
}

/* Icon-only */
.btn-icon {
  padding: var(--sp-2);
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
}

/* Sizes */
.btn-sm { padding: 6px 12px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }

/* ────────────────────────────────────────────────────────────
   FORM ELEMENTS
   ──────────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); }

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

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

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
  flex-shrink: 0;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-base);
  -webkit-appearance: none;
}
.form-input.has-icon { padding-left: 44px; }
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--primary-from);
  background: rgba(99,102,241,0.06);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.18);
}
.form-input:hover:not(:focus) { border-color: var(--glass-border-hover); }

/* Textarea */
textarea.form-input {
  resize: none;
  min-height: 48px;
  max-height: 200px;
  line-height: 1.5;
  overflow-y: auto;
  field-sizing: content;
}

/* Select */
select.form-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  -webkit-appearance: none;
}
select.form-input option {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ────────────────────────────────────────────────────────────
   ALERT / ERROR MESSAGES
   ──────────────────────────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
}
.alert-error {
  background: var(--error-dim);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
}
.alert-success {
  background: var(--success-dim);
  border: 1px solid rgba(16,185,129,0.3);
  color: #6ee7b7;
}
.alert-warning {
  background: var(--warning-dim);
  border: 1px solid rgba(245,158,11,0.3);
  color: #fcd34d;
}
.alert-info {
  background: var(--info-dim);
  border: 1px solid rgba(59,130,246,0.3);
  color: #93c5fd;
}
.alert.hidden { display: none; }

/* ────────────────────────────────────────────────────────────
   BADGE / PILL
   ──────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.badge-primary  { background: rgba(99,102,241,0.2);  color: #a5b4fc; border: 1px solid rgba(99,102,241,0.3); }
.badge-success  { background: var(--success-dim);    color: #6ee7b7; border: 1px solid rgba(16,185,129,0.3); }
.badge-warning  { background: var(--warning-dim);    color: #fcd34d; border: 1px solid rgba(245,158,11,0.3); }
.badge-error    { background: var(--error-dim);      color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.badge-info     { background: var(--info-dim);       color: #93c5fd; border: 1px solid rgba(59,130,246,0.3); }
.badge-muted    { background: rgba(100,116,139,0.15);color: var(--text-muted); border: 1px solid rgba(100,116,139,0.2); }
.badge-accent   { background: rgba(6,182,212,0.15);  color: #67e8f9; border: 1px solid rgba(6,182,212,0.3); }

/* Provider badge */
.provider-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  color: #a5b4fc;
  margin-top: var(--sp-2);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ────────────────────────────────────────────────────────────
   LOADING SPINNER
   ──────────────────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--primary-from);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
.spinner-sm { width: 14px; height: 14px; }
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

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

/* ────────────────────────────────────────────────────────────
   TYPING INDICATOR (Three Bouncing Dots)
   ──────────────────────────────────────────────────────────── */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 14px 18px;
}
.typing-dot {
  width: 7px; height: 7px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

/* ────────────────────────────────────────────────────────────
   QUEUE STATUS BANNER
   ──────────────────────────────────────────────────────────── */
.queue-banner {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: #fcd34d;
  margin: var(--sp-3) var(--sp-6);
  animation: slideDown 0.3s ease;
}
.queue-banner.hidden { display: none; }
.queue-dot {
  width: 8px; height: 8px;
  background: var(--warning);
  border-radius: 50%;
  animation: queuePulse 1.5s ease-in-out infinite;
}
@keyframes queuePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.75); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ────────────────────────────────────────────────────────────
   CHAT LAYOUT — THREE COLUMN
   ──────────────────────────────────────────────────────────── */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-current-width, var(--sidebar-width)) 1fr;
  grid-template-rows: 100vh;
  height: 100vh;
  overflow: hidden;
  transition: grid-template-columns 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── Sidebar ── */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  z-index: 10;
  transition: width 0.25s cubic-bezier(0.4,0,0.2,1);
  min-width: 0;
}

/* ── Resize handle ── */
.sidebar-resize-handle {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 5px;
  cursor: col-resize;
  z-index: 20;
  background: transparent;
  transition: background 0.15s;
}
.sidebar-resize-handle:hover,
.sidebar-resize-handle.dragging {
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-end, #8b5cf6) 100%);
  opacity: 0.5;
}

/* ── Toggle button (collapse / expand) ── */
.sidebar-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s, transform 0.25s cubic-bezier(0.4,0,0.2,1);
}
.sidebar-toggle-btn:hover { background: var(--glass); color: var(--text-primary); }
.sidebar-toggle-btn svg { transition: transform 0.25s cubic-bezier(0.4,0,0.2,1); }

/* ── Collapsed sidebar state ── */
.sidebar.collapsed .sidebar-toggle-btn svg { transform: rotate(180deg); }

/* Hide text labels when collapsed */
.sidebar.collapsed .sidebar-logo-text,
.sidebar.collapsed .sidebar-section-label,
.sidebar.collapsed .sidebar-user-info,
.sidebar.collapsed .sidebar-new-chat-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity 0.2s, width 0.25s;
}
.sidebar:not(.collapsed) .sidebar-logo-text,
.sidebar:not(.collapsed) .sidebar-section-label,
.sidebar:not(.collapsed) .sidebar-user-info,
.sidebar:not(.collapsed) .sidebar-new-chat-text {
  opacity: 1;
  transition: opacity 0.2s 0.1s, width 0.25s;
}

/* Collapsed layout adjustments */
.sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: var(--sp-3) var(--sp-2);
}
.sidebar.collapsed .sidebar-new-chat {
  display: none;
}
.sidebar.collapsed .sidebar-conversations {
  display: none;
}
.sidebar.collapsed .sidebar-footer {
  justify-content: center;
  padding: var(--sp-3) var(--sp-2);
}
.sidebar.collapsed .conv-item {
  display: none;
}
.sidebar.collapsed .conv-item-content  { display: none; }
.sidebar.collapsed .conv-item-icon     { display: none; }
.sidebar.collapsed .conv-item-actions  { display: none; }

/* Hide the inline toggle button when collapsed — the floating tab takes over */
.sidebar.collapsed .sidebar-toggle-btn { display: none; }

/* ── Floating expand tab (visible only when collapsed) ── */
.sidebar-expand-tab {
  display: none; /* hidden by default */
  position: absolute;
  right: -18px;        /* protrudes into main area */
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 64px;
  background: linear-gradient(180deg, #6366f1, #8b5cf6);
  border-radius: 0 10px 10px 0;
  box-shadow: 4px 0 16px rgba(99,102,241,0.45);
  cursor: pointer;
  border: none;
  color: #fff;
  transition: width 0.15s, box-shadow 0.15s, right 0.15s;
  padding: 0;
}
.sidebar-expand-tab:hover {
  width: 26px;
  right: -24px;
  box-shadow: 6px 0 24px rgba(99,102,241,0.6);
}
.sidebar-expand-tab svg {
  width: 14px;
  height: 14px;
  transition: transform 0.15s;
}
.sidebar-expand-tab:hover svg { transform: translateX(2px); }

/* Show it only when sidebar is collapsed */
.sidebar.collapsed .sidebar-expand-tab { display: flex; }

/* Ensure sidebar allows overflow for the protruding tab */
.sidebar.collapsed { overflow: visible; }

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

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}
.sidebar-logo svg { flex-shrink: 0; }

.sidebar-new-chat {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  margin: var(--sp-3);
  background: var(--primary-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px var(--primary-glow);
  flex-shrink: 0;
}
.sidebar-new-chat:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--primary-glow);
}

/* ── Group Chats shortcut link (above New Chat) ── */
.sidebar-groups-link {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  margin: var(--sp-2) var(--sp-3) 0;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.sidebar-groups-link:hover {
  background: var(--glass-bg-hover);
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.sidebar-groups-link .sidebar-groups-icon { flex-shrink: 0; font-size: 0.9rem; line-height: 1; }
.sidebar.collapsed .sidebar-groups-link {
  display: none;
}

/* ── Share Modal ── */
.share-modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  z-index: 500; display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.share-modal-overlay.hidden { display: none; }
.share-modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 480px;
  max-width: 94vw;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.share-modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.share-modal-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.share-modal-subtitle { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; }

.share-scope-list { display: flex; flex-direction: column; gap: 8px; }
.share-scope-option {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 14px; border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer; transition: all var(--transition-fast);
  background: var(--glass-bg);
  position: relative;
}
.share-scope-option:hover:not(.disabled) {
  border-color: var(--border-strong); background: var(--glass-bg-hover);
}
.share-scope-option.selected { border-color: rgba(99,102,241,0.5); background: rgba(99,102,241,0.1); }
.share-scope-option.disabled { opacity: 0.5; cursor: not-allowed; }
.share-scope-option input[type="radio"] { accent-color: #6366f1; flex-shrink: 0; width: 16px; height: 16px; }
.share-scope-body { flex: 1; min-width: 0; }
.share-scope-name { font-size: 0.87rem; font-weight: 600; color: var(--text-primary); display: flex; align-items: center; gap: 6px; }
.share-scope-desc { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.share-scope-badge {
  font-size: 0.66rem; padding: 2px 7px; border-radius: var(--radius-full);
  font-weight: 700; letter-spacing: 0.05em;
  background: rgba(245,158,11,0.15); color: #f59e0b;
  border: 1px solid rgba(245,158,11,0.25);
  white-space: nowrap;
}

.share-link-box {
  display: flex; gap: 8px; align-items: center;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 8px 12px;
}
.share-link-box input {
  flex: 1; background: none; border: none; outline: none;
  font-size: 0.82rem; color: var(--text-secondary); font-family: 'JetBrains Mono', monospace;
}
.share-modal-footer { display: flex; justify-content: flex-end; gap: 8px; }

/* ── Share scope rows (tiered share modal in chat) ── */
.share-scope-row {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--glass-bg);
  transition: border-color .15s, background .15s;
}
.share-scope-row:hover:not(.share-scope-row--disabled) {
  border-color: rgba(129,140,248,0.35);
  background: rgba(99,102,241,0.06);
}
.share-scope-row--selected {
  border-color: rgba(99,102,241,0.5);
  background: rgba(99,102,241,0.1);
}
.share-scope-row--disabled { opacity: 0.55; }
.share-scope-row input[type="radio"] { margin-top: 2px; flex-shrink: 0; }

.sidebar-section-label {
  padding: var(--sp-2) var(--sp-4);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.sidebar-conversations {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--sp-2) var(--sp-4);
}

.conv-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}
.conv-item:hover {
  background: var(--glass-bg-hover);
}
.conv-item.active {
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.2);
}

.conv-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  font-size: 14px;
}
.conv-item.active .conv-icon { color: var(--primary-from); }

.conv-info {
  flex: 1;
  min-width: 0;
}
.conv-title {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}
.conv-date {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.conv-delete {
  opacity: 0;
  padding: 4px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.conv-item:hover .conv-delete {
  opacity: 1;
}
.conv-delete:hover {
  background: var(--error-dim);
  color: var(--error);
}

.conv-share {
  opacity: 0;
  padding: 4px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.conv-item:hover .conv-share {
  opacity: 1;
}
.conv-share:hover {
  background: rgba(99,102,241,0.15);
  color: #818cf8;
}

.sidebar-footer {
  padding: var(--sp-3) var(--sp-4);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

.sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-role {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ── Sidebar overlay (hidden by default; only shown on mobile when sidebar opens) ── */
.sidebar-overlay {
  display: none;
}

/* ── Main Content Area ── */
.main-area {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  min-width: 0;              /* prevent flex/grid overflow */
  background: var(--bg-base);
  /* Explicitly occupy column 2 so sibling elements (overlay etc.) don't displace it */
  grid-column: 2;
  grid-row: 1;
}

/* ── Top Header Bar ── */
.header-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 var(--sp-6);
  height: var(--header-height);
  border-bottom: 1px solid var(--border);
  background: rgba(10,14,26,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
  z-index: 5;
}

.header-title {
  flex: 1;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-left: auto;
}

/* Provider Selector in header */
.provider-select-wrapper {
  position: relative;
}
.provider-select-wrapper select {
  padding: 6px 32px 6px 12px;
  font-size: 0.8125rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.provider-select-wrapper select:hover { border-color: var(--glass-border-hover); }
.provider-select-wrapper select:focus { border-color: var(--primary-from); }
.provider-select-wrapper select option {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ── Messages Area ── */
.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-8) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

/* Empty state */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-16);
  gap: var(--sp-4);
}
.empty-state-icon {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: var(--shadow-glow);
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.empty-state h2 { font-size: 1.5rem; color: var(--text-primary); }
.empty-state p  { font-size: 0.9375rem; color: var(--text-muted); max-width: 380px; }

/* ── Chat Bubbles ── */
.message-row {
  display: flex;
  gap: var(--sp-3);
  max-width: 820px;
  animation: fadeInUp 0.3s ease;
}
.message-row.user {
  flex-direction: row-reverse;
  align-self: flex-end;
}
.message-row.assistant { align-self: flex-start; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.message-row.user .msg-avatar {
  background: var(--primary-gradient);
  color: white;
}
.message-row.assistant .msg-avatar {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--accent);
  font-size: 1rem;
}

.msg-content { flex: 1; min-width: 0; }

.msg-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 100%;
  word-wrap: break-word;
}

/* User bubble */
.message-row.user .msg-bubble {
  background: var(--primary-gradient);
  color: #fff;
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: 0 4px 20px var(--primary-glow);
}

/* Assistant bubble */
.message-row.assistant .msg-bubble {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-bottom-left-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.msg-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-1);
  flex-wrap: wrap;
}
.message-row.user .msg-meta { justify-content: flex-end; }

.msg-time {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Typing bubble */
.typing-bubble {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  max-width: 820px;
  align-self: flex-start;
  animation: fadeInUp 0.3s ease;
}
.typing-bubble .bubble-inner {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
  padding: 10px 14px;
}
.typing-bubble.hidden { display: none; }

/* ────────────────────────────────────────────────────────────
   MARKDOWN RENDERED CONTENT
   ──────────────────────────────────────────────────────────── */
.markdown-content h1, .markdown-content h2,
.markdown-content h3, .markdown-content h4 {
  font-size: inherit;
  font-weight: 700;
  margin: 1em 0 0.4em;
  color: inherit;
  letter-spacing: -0.01em;
}
.markdown-content h1 { font-size: 1.2em; }
.markdown-content h2 { font-size: 1.1em; }
.markdown-content h3 { font-size: 1em; }
.markdown-content p  { margin: 0.5em 0; color: inherit; }
.markdown-content p:first-child { margin-top: 0; }
.markdown-content p:last-child  { margin-bottom: 0; }

.markdown-content ul, .markdown-content ol {
  margin: 0.5em 0;
  padding-left: 1.4em;
}
.markdown-content li { margin: 0.25em 0; color: inherit; }
.markdown-content strong { font-weight: 700; color: inherit; }
.markdown-content em { font-style: italic; }

.markdown-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.markdown-content a:hover { opacity: 0.8; }

.markdown-content blockquote {
  border-left: 3px solid var(--primary-from);
  padding-left: 12px;
  margin: 0.75em 0;
  opacity: 0.85;
  font-style: italic;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75em 0;
  font-size: 0.875em;
}
.markdown-content th, .markdown-content td {
  padding: 8px 12px;
  border: 1px solid var(--glass-border);
  text-align: left;
}
.markdown-content th {
  background: var(--glass-bg);
  font-weight: 600;
}
.markdown-content tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Code Blocks ── */
.markdown-content code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85em;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 1px 6px;
  border-radius: 4px;
  color: #e2e8f0;
}
.message-row.user .markdown-content code {
  background: rgba(0,0,0,0.25);
  border-color: rgba(255,255,255,0.2);
  color: #fff;
}

.markdown-content pre {
  background: #0d1117;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin: 0.75em 0;
  position: relative;
}
.markdown-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.8125em;
  color: #e2e8f0;
  border-radius: 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.4);
  padding: 6px 12px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border: 1px solid rgba(255,255,255,0.1);
  border-bottom: none;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}
.code-header + pre { border-radius: 0 0 var(--radius-md) var(--radius-md); }
.copy-btn {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.copy-btn:hover { color: var(--text-primary); border-color: var(--glass-border-hover); }

/* ────────────────────────────────────────────────────────────
   INPUT AREA
   ──────────────────────────────────────────────────────────── */
.input-area {
  padding: var(--sp-4) var(--sp-6) var(--sp-5);
  border-top: 1px solid var(--border);
  background: rgba(10,14,26,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
}

.input-box {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  overflow: hidden;
}
.input-box:focus-within {
  border-color: var(--primary-from);
  background: rgba(99,102,241,0.04);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.input-top-row {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4) var(--sp-3);
}

.chat-textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.5;
  resize: none;
  min-height: 24px;
  max-height: 200px;
  overflow-y: auto;
  align-self: center;
}
.chat-textarea::placeholder { color: var(--text-muted); }

.send-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  border: none;
  background: var(--primary-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  flex-shrink: 0;
  box-shadow: 0 3px 10px var(--primary-glow);
}
.send-btn:hover:not(:disabled) {
  filter: brightness(1.15);
  transform: scale(1.05);
}
.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.input-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4) var(--sp-2);
}

.input-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
}
.token-counter {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.token-counter.warn  { color: var(--warning); }
.token-counter.limit { color: var(--error); }

/* Token usage bar */
.usage-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  padding: var(--sp-2) var(--sp-6);
  font-size: 0.7rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255,255,255,0.04);
}
.usage-stat {
  display: flex;
  align-items: center;
  gap: 5px;
}
.usage-stat strong { color: var(--text-secondary); }

/* ────────────────────────────────────────────────────────────
   LOGIN PAGE
   ──────────────────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}

/* Animated gradient orbs */
.login-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.login-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbFloat 8s ease-in-out infinite;
}
.login-orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #6366f1, transparent 70%);
  top: -20%; left: -15%;
  animation-delay: 0s;
}
.login-orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #8b5cf6, transparent 70%);
  bottom: -15%; right: -10%;
  animation-delay: -3s;
}
.login-orb-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #06b6d4, transparent 70%);
  top: 30%; right: 10%;
  opacity: 0.2;
  animation-delay: -5s;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(30px, -20px) scale(1.05); }
  66%  { transform: translate(-20px, 15px) scale(0.97); }
}

/* Grid pattern overlay */
.login-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 0;
  pointer-events: none;
}

.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: var(--sp-10) var(--sp-10);
  background: rgba(17, 24, 39, 0.8);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl), inset 0 1px 0 rgba(255,255,255,0.08);
  animation: cardReveal 0.7s cubic-bezier(0.22,1,0.36,1) both;
}

@keyframes cardReveal {
  from { opacity: 0; transform: translateY(24px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.login-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-8);
}
.login-logo-icon {
  width: 64px; height: 64px;
  background: var(--primary-gradient);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px var(--primary-glow);
  animation: iconPulse 3s ease-in-out infinite;
}
@keyframes iconPulse {
  0%, 100% { box-shadow: 0 8px 32px var(--primary-glow); }
  50% { box-shadow: 0 12px 48px rgba(99,102,241,0.5); }
}

.login-app-name {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.login-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  font-weight: 400;
  margin-top: calc(-1 * var(--sp-2));
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.login-submit {
  width: 100%;
  padding: 14px;
  margin-top: var(--sp-2);
  font-size: 1rem;
  font-weight: 700;
  background: var(--primary-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px var(--primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: inherit;
  letter-spacing: 0.01em;
}
.login-submit:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 8px 28px var(--primary-glow);
}
.login-submit:active { transform: translateY(0); }
.login-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.login-footer {
  margin-top: var(--sp-8);
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.login-footer a { color: var(--primary-from); }

/* ────────────────────────────────────────────────────────────
   ADMIN DASHBOARD
   ──────────────────────────────────────────────────────────── */
.admin-layout {
  min-height: 100vh;
  background: var(--bg-base);
}

.admin-header {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 0 var(--sp-8);
  height: 64px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.admin-header-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 700;
  font-size: 1rem;
}
.admin-header-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.admin-header-divider {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.admin-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--sp-8) var(--sp-8);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-5);
  margin-bottom: var(--sp-8);
}

.stat-card {
  padding: var(--sp-6);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.stat-card:hover::before { opacity: 0.03; }
.stat-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-icon-blue   { background: var(--info-dim); }
.stat-icon-green  { background: var(--success-dim); }
.stat-icon-purple { background: rgba(99,102,241,0.15); }
.stat-icon-yellow { background: var(--warning-dim); }

.stat-info { flex: 1; min-width: 0; }
.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: var(--sp-1);
}
.stat-value {
  font-size: 1.875rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
}
.stat-change {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--sp-1);
}

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-4);
}
.section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.section-title::before {
  content: '';
  width: 3px; height: 16px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

/* Tables */
.data-table-wrap {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--sp-8);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table thead {
  background: rgba(255,255,255,0.02);
}
.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table td {
  padding: 14px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr {
  transition: background var(--transition-fast);
}
.data-table tbody tr:hover td {
  background: rgba(255,255,255,0.02);
  color: var(--text-primary);
}
.data-table td strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Progress bar */
.usage-bar-wrap {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 160px;
}
.usage-bar-bg {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.usage-bar-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}
.usage-bar-fill.warn { background: linear-gradient(90deg, var(--warning), #fb923c); }
.usage-bar-fill.danger { background: linear-gradient(90deg, var(--error), #f97316); }
.usage-bar-pct {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 32px;
  text-align: right;
}

/* Auto-refresh indicator */
.refresh-indicator {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.refresh-dot {
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: queuePulse 2s ease-in-out infinite;
}

/* Chart section */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
  margin-bottom: var(--sp-8);
}
.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
}
.chart-card canvas { max-height: 260px; }

/* ────────────────────────────────────────────────────────────
   RESPONSIVE
   ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 100vh;
  }
  .sidebar {
    position: fixed;
    left: calc(-1 * var(--sidebar-width));
    width: var(--sidebar-width);
    height: 100vh;
    z-index: 200;
    transform: translateX(calc(-1 * var(--sidebar-width)));
    transition: transform var(--transition-base);
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay {
    /* shown only on mobile when sidebar is open */
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 190;
    backdrop-filter: blur(4px);
  }
  .sidebar.open ~ .sidebar-overlay { display: block; }

  .messages-area { padding: var(--sp-4) var(--sp-3); }
  .input-area { padding: var(--sp-3); }
  .header-bar { padding: 0 var(--sp-3); }
  .message-row { max-width: 100%; }

  .admin-content { padding: var(--sp-4); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .login-card { margin: var(--sp-4); padding: var(--sp-6); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .login-card { padding: var(--sp-5); }
  .data-table th:nth-child(n+4),
  .data-table td:nth-child(n+4) { display: none; }
}

/* ────────────────────────────────────────────────────────────
   UTILITY CLASSES
   ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.mt-2 { margin-top: var(--sp-2); }
.mt-4 { margin-top: var(--sp-4); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-8 { margin-bottom: var(--sp-8); }
.w-full { width: 100%; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rounded { border-radius: var(--radius-md); }
.rounded-full { border-radius: var(--radius-full); }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }