/* -- Empty State -------------------------------------- */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: 56px 24px; text-align: center;
}
.empty-state .material-symbols-outlined,
.empty-state .empty-icon,
.empty-state .icon {
  font-size: 48px; color: var(--k-primary);
  background: var(--k-primary-ultra-light);
  width: 88px; height: 88px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--k-radius-xl); margin-bottom: 20px;
  box-shadow: 0 0 0 8px rgba(99,102,241,0.06);
}
.empty-state h3 {
  font: var(--k-text-h3); margin-bottom: 8px; color: var(--k-text);
}
.empty-state p {
  font: var(--k-text-body); color: var(--k-text-secondary);
  max-width: 380px; margin-bottom: 24px; line-height: 1.6;
}
.empty-state .btn { gap: 6px; }
.empty-state .btn .material-symbols-outlined { font-size: 18px; margin: 0; }

/* -- Modal (Glassmorphic) ----------------------------- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.72);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  animation: fadeOverlay var(--k-dur-normal);
}
@supports (backdrop-filter: blur(1px)) {
  .modal-overlay {
    background: var(--k-scrim);
    backdrop-filter: blur(8px);
  }
}
@keyframes fadeOverlay { from { opacity: 0; } to { opacity: 1; } }
/* Exit animation */
.modal-overlay.closing {
  animation: fadeOverlayOut var(--k-dur-normal) var(--k-ease) forwards;
}
.modal-overlay.closing .modal {
  animation: modalOut var(--k-dur-normal) var(--k-ease) forwards;
}
@keyframes fadeOverlayOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}
@keyframes modalOut {
  from { opacity: 1; transform: scale(1) translateY(0); }
  to   { opacity: 0; transform: scale(0.95) translateY(8px); }
}
.modal {
  background: var(--k-surface);
  border-radius: var(--k-radius-xl); padding: 0;
  min-width: min(420px, calc(100vw - 32px)); max-width: 600px; width: 90%;
  max-height: calc(100vh - 120px);
  box-shadow: var(--k-shadow-xl);
  animation: modalIn var(--k-dur-medium) var(--k-ease-bounce);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.modal--wide { max-width: 760px; }
.modal--preview-email { max-width: 980px; }
/* v=85: two-panel preview — modal-body must be a flex column container */
.modal--preview-email .modal-body { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.modal-title {
  font: var(--k-text-h3); padding: 20px 28px;
  background: var(--k-surface-sunken);
  border-bottom: 1px solid var(--k-border-light);
}
.modal-body {
  font: var(--k-text-body); color: var(--k-text-secondary);
  line-height: 1.6; padding: 20px 28px;
  overflow-y: auto; flex: 1;
}
.modal-actions {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 16px 28px;
  background: var(--k-surface-sunken);
  border-top: 1px solid var(--k-border-light);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* -- Snackbar / Toast (Modern) ------------------------ */
.snackbar {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 14px 20px; border-radius: var(--k-radius-lg);
  background: var(--k-surface-raised); color: var(--k-text);
  font: var(--k-text-body);
  box-shadow: var(--k-shadow-xl);
  display: flex; align-items: center; gap: 12px;
  z-index: 200; max-width: 480px; opacity: 0; pointer-events: none;
  transition: transform var(--k-dur-medium) var(--k-ease), opacity var(--k-dur-medium) var(--k-ease);
  border: 1px solid var(--k-border);
}
.snackbar.show { transform: translateX(-50%) translateY(0); opacity: 1; pointer-events: auto; }
.snackbar.dismissing {
  transform: translateX(-50%) translateY(80px); opacity: 0; pointer-events: none;
}
.snackbar.error { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; border: none; }
.snackbar.success { background: linear-gradient(135deg, #10b981, #059669); color: #fff; border: none; }
.snackbar .btn-text { color: #fff; }
.snackbar-icon { font-size: 20px; flex-shrink: 0; }

/* -- Variant Badge ------------------------------------ */
.variant-badge {
  width: 32px; height: 32px; border-radius: var(--k-radius-full);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.variant-badge--selected { background: var(--k-instant-blue); }
.variant-badge--disabled { background: #c5cad3; }

/* -- Section header ----------------------------------- */
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.section-title { font: var(--k-text-h3); color: var(--k-text); }

/* -- Helper text -------------------------------------- */
.text-secondary { color: var(--k-text-secondary); }

/* -- Grids -------------------------------------------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
@media (max-width: 1024px) { .grid-4, .grid-5 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; } }

/* -- Stats row ---------------------------------------- */
.stat-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.stat-item {
  display: flex; align-items: center; gap: 4px;
  font: var(--k-text-label); color: var(--k-text-secondary);
}
.stat-item .material-symbols-outlined { font-size: 18px; }

/* -- Provider icons ----------------------------------- */
.provider-icon {
  width: 24px; height: 24px; border-radius: var(--k-radius-xs);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}
.provider-icon.google, .provider-google { background: #fff; color: #4285f4; border: 1.5px solid #e8eaed; }
.provider-icon.microsoft, .provider-microsoft { background: #fff; color: #f25022; border: 1.5px solid #e8eaed; }
.provider-icon.other, .provider-other { background: var(--k-surface-sunken); color: #64748b; }
[data-theme="dark"] .provider-icon.google, [data-theme="dark"] .provider-google {
  background: var(--k-surface-raised); border-color: var(--k-border);
}
[data-theme="dark"] .provider-icon.microsoft, [data-theme="dark"] .provider-microsoft {
  background: var(--k-surface-raised); border-color: var(--k-border);
}
[data-theme="dark"] .provider-icon.other, [data-theme="dark"] .provider-other {
  background: var(--k-surface-sunken); color: var(--k-text-secondary);
}

/* -- Divider ------------------------------------------ */
.divider { height: 1px; background: var(--k-border-light); margin: 20px 0; }

/* -- Split Panel -------------------------------------- */
/* -- Split Panel (sequences/schedule two-column) ----- */
.split-panel {
  display: grid; grid-template-columns: 344px 1fr;
  gap: 0; background: var(--k-surface);
  border-radius: var(--k-radius-lg); border: 1px solid var(--k-border-light);
  min-height: 500px; overflow: hidden; box-shadow: var(--k-shadow-sm);
}
.split-panel .panel-left { border-right: 1px solid var(--k-border-light); padding: 20px; overflow-y: auto; }
.split-panel .panel-right { padding: 20px; overflow-y: auto; }
.split-left { padding: 16px 16px 24px; overflow-y: auto; }
.email-editor { flex: 1; overflow-y: auto; }
/* Mobile: stack split panel */
@media (max-width: 768px) {
  .split-panel {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    min-height: unset;
  }
  .split-panel .panel-left {
    border-right: none;
    border-bottom: 1px solid var(--k-border-light);
    max-height: 280px; overflow-y: auto;
  }
  .split-panel.sequence-split {
    height: auto; min-height: unset;
  }
  .split-panel.sequence-split > .split-left {
    border-right: none;
    border-bottom: 1px solid var(--k-border-light);
    height: auto; min-height: 200px; max-height: 40vh;
  }
  .split-panel.sequence-split > .email-editor {
    height: 60vh;
  }
}
/* Mobile table scroll */
@media (max-width: 768px) {
  .md-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
}
/* Modal responsive */
@media (max-width: 480px) {
  .modal { border-radius: var(--k-radius-lg); }
  .modal-title { padding: 16px 20px; }
  .modal-body  { padding: 16px 20px; }
  .modal-actions { padding: 12px 20px; }
}
/* Accessibility: focus rings for interactive elements */
.sidebar-item:focus-visible {
  outline: 2px solid var(--k-primary);
  outline-offset: -2px;
  border-radius: var(--k-radius-md);
}
.tab-bar .tab:focus-visible {
  outline: 2px solid var(--k-primary);
  outline-offset: 2px;
  border-radius: var(--k-radius-xs);
}

/* Sequences tab: pin the split-panel to the viewport so the editor's
   sticky subject + toolbar stay visible regardless of email body height. */
.split-panel.sequence-split {
  height: calc(100vh - 240px); min-height: 520px;
  align-items: stretch;
}
.split-panel.sequence-split > .split-left {
  border-right: 1px solid var(--k-border-light);
  height: 100%; min-height: 0;
  padding: 12px 10px 24px;
}
.split-panel.sequence-split > .email-editor {
  display: flex; flex-direction: column;
  height: 100%; min-height: 0; overflow: hidden;
  padding: 0;
}

/* -- Tooltip ------------------------------------------ */
[data-tooltip] { position: relative; }
[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute; left: 100%; top: 50%; transform: translateY(-50%);
  margin-left: 8px; padding: 8px 12px;
  border-radius: var(--k-radius-sm);
  background: #1e293b; color: #fff;
  font: var(--k-text-small); white-space: nowrap; z-index: 50;
  box-shadow: var(--k-shadow-lg);
  animation: fadeIn var(--k-dur-fast);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* -- FAB (Floating Action) ---------------------------- */
.fab {
  position: fixed; bottom: 24px; right: 24px;
  width: 52px; height: 52px; border-radius: var(--k-radius-lg);
  background: var(--k-gradient); color: #fff;
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--k-shadow-primary); z-index: 20;
  transition:
    transform  var(--k-dur-normal) var(--k-ease-bounce),
    box-shadow var(--k-dur-normal) var(--k-ease);
  will-change: transform;
}
.fab:hover {
  transform: scale3d(1.08, 1.08, 1); box-shadow: 0 8px 24px rgba(99,102,241,0.4);
}

/* -- Loading Skeleton --------------------------------- */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.skeleton {
  background: linear-gradient(90deg, var(--k-surface-sunken) 25%, var(--k-border-light) 50%, var(--k-surface-sunken) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--k-radius-sm);
}

/* -- App Loading -------------------------------------- */
.app-loading {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; height: 100vh; gap: 16px;
  font: var(--k-text-body); color: var(--k-text-secondary);
}
.loading-spinner {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--k-primary) 0deg,
    rgba(99,102,241,0.12) 270deg,
    transparent 360deg
  );
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
          mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
  animation: spin 0.75s linear infinite;
}
@supports not (background: conic-gradient(red, blue)) {
  .loading-spinner {
    background: none;
    -webkit-mask: none; mask: none;
    border: 3px solid var(--k-border);
    border-top-color: var(--k-primary);
  }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* -- Action Menu Popover (UI-3) ----------------------- */
.action-menu-popover {
  position: fixed; z-index: 200;
  min-width: 180px; padding: 6px 0;
  background: var(--k-surface);
  border: 1px solid var(--k-border-light);
  border-radius: var(--k-radius-md);
  box-shadow: var(--k-shadow-dropdown);
  animation: fadeIn var(--k-dur-fast) var(--k-ease);
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.action-menu-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 16px; cursor: pointer;
  font: var(--k-text-body); color: var(--k-text);
  transition: background var(--k-dur-fast);
}
.action-menu-item:hover { background: var(--k-surface-sunken); }
.action-menu-item .material-symbols-outlined { font-size: 18px; color: var(--k-text-secondary); }
.action-menu-item.danger { color: var(--k-error); }
.action-menu-item.danger .material-symbols-outlined { color: var(--k-error); }
.action-menu-divider { height: 1px; background: var(--k-border-light); margin: 4px 0; }

/* -- Search Input (UI-2) ------------------------------ */
.search-input-wrap {
  display: flex; align-items: center; gap: 8px;
  background: var(--k-surface-sunken);
  border: 1px solid var(--k-border-light);
  border-radius: var(--k-radius-full);
  padding: 0 14px; height: 36px;
  transition: border-color var(--k-dur-normal) var(--k-ease);
  max-width: 260px; width: 100%;
}
.search-input-wrap:focus-within { border-color: var(--k-primary); background: var(--k-surface); }
.search-input-wrap .material-symbols-outlined { font-size: 18px; color: var(--k-text-tertiary); flex-shrink: 0; }
.search-input {
  border: none; background: transparent; outline: none;
  font: var(--k-text-body); color: var(--k-text);
  width: 100%;
}

/* -- Sidebar Badge (UI-6) ----------------------------- */
.sidebar-badge {
  position: absolute; top: 2px; right: 2px;
  min-width: 18px; height: 18px;
  padding: 0 5px; border-radius: 9px;
  background: var(--k-error); color: #fff;
  font: var(--k-text-label-sm); font-size: 10px;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.sidebar-item { position: relative; }

/* -- Danger Button Variant ----------------------------- */
.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626) !important;
  color: #fff !important; border-color: transparent !important;
}