:root {
  --bg-primary: #090e1a;
  --bg-secondary: #0f172a;
  --bg-card: #141e33;
  --bg-input: #1a2744;
  --border-color: #243456;
  --border-focus: #3b82f6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-green: #10b981;
  --accent-green-bg: rgba(16, 185, 129, 0.15);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-danger: #ef4444;
  --accent-danger-bg: rgba(239, 68, 68, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body.dark-theme {
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* OVERLAYS & MODALS */
.overlay, .modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 15, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}
.hidden { display: none !important; }

.auth-card, .modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}
.modal-card { max-width: 520px; }

.auth-brand {
  text-align: center;
  margin-bottom: 28px;
}
.brand-badge {
  font-size: 32px;
  background: var(--bg-input);
  display: inline-block;
  padding: 10px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--border-color);
}
.auth-brand h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
}
.auth-brand h1 span { color: var(--accent-green); }
.auth-brand p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }

/* FORMS */
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}
input, select, textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--border-focus);
}
.form-error {
  color: var(--accent-danger);
  font-size: 13px;
  margin-bottom: 12px;
}

/* BUTTONS */
button {
  cursor: pointer;
  border: none;
  outline: none;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.btn-primary {
  background: var(--accent-green);
  color: #04101e;
  padding: 11px 20px;
  font-weight: 700;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secondary {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 10px 18px;
}
.btn-secondary:hover { background: #223359; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 14px;
}
.btn-outline:hover { border-color: var(--text-muted); }
.btn-danger {
  color: var(--accent-danger);
  border-color: rgba(239, 68, 68, 0.4);
}
.btn-danger:hover { background: var(--accent-danger-bg); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-icon { background: transparent; color: var(--text-muted); font-size: 18px; padding: 6px; }
.btn-icon:hover { color: var(--text-main); }
.full-width { width: 100%; }

/* TOPBAR */
.topbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Montserrat', sans-serif;
  font-size: 18px;
  font-weight: 800;
}
.logo-mark { color: var(--accent-green); font-size: 20px; }
.logo-tag {
  background: var(--accent-green-bg);
  color: var(--accent-green);
  font-size: 11px;
  padding: 3px 7px;
  border-radius: 4px;
}
.tenant-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
}
.tenant-picker label { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.tenant-picker select { width: 220px; padding: 7px 10px; font-size: 13px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.badge-connected { background: var(--accent-green-bg); color: var(--accent-green); }
.badge-connected .status-dot { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.badge-disconnected { background: var(--accent-danger-bg); color: var(--accent-danger); }
.badge-disconnected .status-dot { background: var(--accent-danger); }
.badge-connecting { background: rgba(234, 179, 8, 0.15); color: #eab308; }
.badge-connecting .status-dot { background: #eab308; }

.user-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* NAV TABS */
.nav-tabs {
  background: #0c1322;
  border-bottom: 1px solid var(--border-color);
  padding: 0 28px;
  display: flex;
  gap: 8px;
}
.nav-tab {
  background: transparent;
  color: var(--text-muted);
  padding: 14px 18px;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-tab:hover { color: var(--text-main); }
.nav-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
  font-weight: 700;
}
.count-badge {
  background: var(--bg-input);
  color: var(--text-main);
  padding: 2px 7px;
  border-radius: 10px;
  font-size: 11px;
}

/* CONTENT VIEWPORT */
.content-viewport {
  padding: 28px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.2s ease-in; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.pane-header h2 { font-size: 20px; font-weight: 700; }
.pane-header p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.header-actions { display: flex; align-items: center; gap: 16px; }

/* CARD & GRID */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}
.card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.card-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }

/* TAB 1: WHATSAPP */
.whatsapp-connect-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.qr-box {
  background: #fff;
  border-radius: var(--radius-md);
  width: 280px;
  height: 280px;
  margin: 0 auto 20px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}
.qr-img { width: 100%; height: 100%; object-fit: contain; }
.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: #334155;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid #cbd5e1;
  border-top-color: #10b981;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.qr-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.pair-form { margin-bottom: 20px; }
.pair-result {
  background: var(--bg-input);
  border: 1px dashed var(--accent-green);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
}
.pairing-code {
  font-family: monospace;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-green);
  letter-spacing: 4px;
  margin: 8px 0;
}
.connection-info-box {
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.connection-info-box h4 { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.info-row:last-child { border-bottom: none; }

/* TAB 2: AI CONFIG */
.niche-selector { margin-bottom: 24px; }
.section-label { display: block; font-size: 13px; font-weight: 700; color: var(--text-muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.niche-cards {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}
.niche-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-align: center;
}
.niche-btn:hover { border-color: var(--border-focus); }
.niche-btn.active {
  background: var(--accent-green-bg);
  color: var(--accent-green);
  border-color: var(--accent-green);
}
.ai-form-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 24px;
}
.toggle-control {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.toggle-control input { display: none; }
.toggle-slider {
  width: 44px;
  height: 24px;
  background: #334155;
  border-radius: 12px;
  position: relative;
  transition: 0.2s;
}
.toggle-slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 4px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: 0.2s;
}
.toggle-control input:checked + .toggle-slider { background: var(--accent-green); }
.toggle-control input:checked + .toggle-slider::after { transform: translateX(18px); }
.toggle-label { font-size: 13px; font-weight: 600; }

/* TAB 3: SIMULATOR */
.simulator-wrapper {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 28px;
  align-items: start;
}
.phone-mockup {
  background: #020617;
  border: 8px solid #1e293b;
  border-radius: 36px;
  height: 600px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}
.phone-header {
  background: #0f172a;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #1e293b;
}
.phone-avatar { font-size: 24px; }
.phone-title strong { display: block; font-size: 14px; }
.phone-title span { font-size: 11px; color: var(--accent-green); }
.phone-chat {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #0b1120;
}
.chat-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.4;
}
.chat-bubble.bot {
  background: #1e293b;
  color: #f1f5f9;
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}
.chat-bubble.user {
  background: #065f46;
  color: #ecfdf5;
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}
.phone-input-bar {
  padding: 10px;
  background: #0f172a;
  display: flex;
  gap: 8px;
  border-top: 1px solid #1e293b;
}
.phone-input-bar input {
  background: #1e293b;
  border: none;
  padding: 10px 14px;
  font-size: 13px;
}
.btn-send {
  background: var(--accent-green);
  color: #04101e;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sim-hints ul { padding-left: 20px; margin: 14px 0; font-size: 14px; line-height: 1.8; }
.muted { color: var(--text-muted); font-size: 13px; }

/* TAB 4: LEADS */
.leads-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  height: 640px;
}
.leads-list-card, .leads-chat-card {
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.leads-search { padding: 14px; border-bottom: 1px solid var(--border-color); }
.leads-container { flex: 1; overflow-y: auto; }
.lead-item {
  padding: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  cursor: pointer;
  transition: 0.15s;
}
.lead-item:hover, .lead-item.active { background: var(--bg-input); }
.lead-item strong { display: block; font-size: 14px; }
.lead-item p { font-size: 12px; color: var(--text-muted); margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lead-meta { display: flex; justify-content: space-between; font-size: 11px; color: #64748b; margin-top: 6px; }

.chat-view-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.lead-messages-box {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lead-reply-bar {
  padding: 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
}
.empty-state, .empty-chat-state {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin: auto;
  padding: 40px 20px;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  border: 1px solid var(--accent-green);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  z-index: 1000;
}
.toast.show { transform: translateY(0); opacity: 1; }

@media (max-width: 900px) {
  .whatsapp-connect-grid, .ai-form-grid, .simulator-wrapper, .leads-layout {
    grid-template-columns: 1fr;
  }
  .niche-cards { grid-template-columns: repeat(3, 1fr); }
  .topbar { flex-direction: column; gap: 12px; align-items: stretch; }
  .topbar-left, .topbar-right { justify-content: space-between; }
}