/* ─── App Shell ─── */
.app-body { padding: 48px 0; }
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.app-title {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.app-subtitle { font-size: 14px; color: var(--fg-muted); margin-top: 4px; }

/* nav tabs */
.app-nav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.app-nav-link {
  padding: 10px 16px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s;
}
.app-nav-link:hover { color: var(--fg); }
.app-nav-link.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Cards */
.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}
.card + .card { margin-top: 16px; }
.card-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}
.card-meta { font-size: 13px; color: var(--fg-muted); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent); color: #0e0e0e; }
.btn-ghost {
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-danger { background: rgba(255,80,80,0.15); color: #ff5050; border: 1px solid rgba(255,80,80,0.2); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* Status badges */
.badge {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
}
.badge-draft { background: rgba(255,255,255,0.06); color: var(--fg-muted); }
.badge-active { background: rgba(202,255,43,0.15); color: var(--accent); }
.badge-paused { background: rgba(255,180,0,0.12); color: #ffb400; }
.badge-completed { background: rgba(100,180,255,0.12); color: #64b4ff; }
.badge-new { background: rgba(255,255,255,0.06); color: var(--fg-muted); }
.badge-emailed { background: rgba(100,180,255,0.12); color: #64b4ff; }
.badge-replied { background: rgba(202,255,43,0.15); color: var(--accent); }
.badge-converted { background: rgba(80,200,80,0.15); color: #50c850; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--fg);
  outline: none;
  transition: border-color 0.15s;
  box-sizing: border-box;
}
.form-input:focus { border-color: var(--accent); }
.form-input::placeholder { color: rgba(255,255,255,0.2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 12px; color: var(--fg-muted); margin-top: 4px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left;
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 12px 12px;
  font-size: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }
.data-table .mono { font-family: monospace; font-size: 13px; }

/* Grid layouts */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 40px; }
.stat-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
}
.stat-card-val {
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.stat-card-label {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 32px;
  color: var(--fg-muted);
}
.empty-state-icon { font-size: 40px; margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}
.empty-state p { font-size: 14px; line-height: 1.6; }

/* Modal overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}
.modal-close {
  float: right;
  background: none;
  border: none;
  color: var(--fg-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
}

/* Inline alert */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 20px;
}
.alert-error { background: rgba(255,80,80,0.1); border: 1px solid rgba(255,80,80,0.2); color: #ff5050; }
.alert-success { background: rgba(80,200,80,0.1); border: 1px solid rgba(80,200,80,0.2); color: #50c850; }

/* Upload area */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}
.upload-area:hover, .upload-area.dragover { border-color: var(--accent); }
.upload-area-icon { font-size: 32px; margin-bottom: 12px; }
.upload-area p { font-size: 14px; color: var(--fg-muted); }
.upload-area strong { color: var(--accent); }

/* Responsive */
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}