/* ===== CSS Variables ===== */
:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --border: #e2e8f0;
  --accent: #5b8dee;
  --accent-hover: #4a7dd8;
  --green: #48bb78;
  --red: #f56565;
  --text: #2d3748;
  --text-light: #718096;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 10px;
  --male-bg: #ebf4ff;
  --male-border: #90cdf4;
  --female-bg: #fff0f6;
  --female-border: #fbb6ce;
  --other-bg: #f7fafc;
  --other-border: #e2e8f0;
  --topbar-h: 60px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ===== Topbar ===== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  z-index: 100;
}
.topbar-left { flex: 0 0 auto; }
.topbar-center { flex: 1; max-width: 340px; }
.topbar-right { flex: 0 0 auto; display: flex; gap: 8px; margin-right: auto; }
.app-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.search-input {
  width: 100%;
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 24px;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.search-input:focus { border-color: var(--accent); background: #fff; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #cbd5e0; }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #e53e3e; }
.btn-icon { font-size: 16px; line-height: 1; }

/* ===== Tree Container ===== */
.tree-container {
  position: fixed;
  top: var(--topbar-h);
  left: 0; right: 0; bottom: 0;
  overflow: hidden;
  background: var(--bg);
}
#tree-svg {
  width: 100%;
  height: 100%;
  cursor: grab;
  display: block;
}
#tree-svg:active { cursor: grabbing; }

/* ===== Edge Legend ===== */
.edge-legend {
  position: absolute;
  bottom: 154px; /* sit above zoom controls */
  right: 24px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  box-shadow: var(--shadow);
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-light);
  white-space: nowrap;
}

/* ===== Zoom Controls ===== */
.zoom-controls {
  position: absolute;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 10;
}
.zoom-btn {
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow);
  transition: background 0.15s;
}
.zoom-btn:hover { background: var(--bg); border-color: var(--accent); color: var(--accent); }

/* ===== Empty State ===== */
.empty-state {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}
.empty-state.hidden { display: none; }
.empty-icon { font-size: 64px; margin-bottom: 16px; }
.empty-state h2 { font-size: 24px; color: var(--text); margin-bottom: 8px; }
.empty-state p { color: var(--text-light); margin-bottom: 20px; }
.empty-state .btn { pointer-events: all; }

/* ===== Person Panel ===== */
.person-panel {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: 320px;
  height: calc(100vh - var(--topbar-h));
  background: var(--surface);
  border-right: 1px solid var(--border);
  box-shadow: 4px 0 20px rgba(0,0,0,0.08);
  z-index: 90;
  overflow: hidden;
  transform: translateX(0);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
}
.person-panel.hidden {
  transform: translateX(-340px);
  pointer-events: none;
}
.panel-close {
  position: absolute;
  top: 12px; left: 12px;
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-light);
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.panel-close:hover { background: var(--border); color: var(--text); }

.panel-photo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 0 16px;
  background: linear-gradient(135deg, #ebf4ff 0%, #f0fff4 100%);
  border-bottom: 1px solid var(--border);
}
/* meta (name/gender/dates) shown inside photo-wrap on mobile, hidden on desktop */
.panel-photo-wrap-meta { display: none; }
.panel-photo-edit {
  position: relative;
  width: 88px; height: 88px;
  border-radius: 50%;
  cursor: pointer;
  flex-shrink: 0;
}
.panel-photo-edit:hover .panel-photo-overlay { opacity: 1; }
.panel-photo-overlay {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  opacity: 0;
  transition: opacity 0.18s;
  pointer-events: none;
}
.panel-photo {
  width: 88px; height: 88px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--surface);
  box-shadow: var(--shadow);
}
.panel-photo.hidden { display: none; }
.panel-initials {
  width: 88px; height: 88px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 32px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  border: 3px solid var(--surface);
  box-shadow: var(--shadow);
}
.panel-body { padding: 16px; flex: 1; overflow-y: auto; }
.panel-name { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.gender-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
}
.gender-badge.male { background: var(--male-bg); color: #2b6cb0; border: 1px solid var(--male-border); }
.gender-badge.female { background: var(--female-bg); color: #97266d; border: 1px solid var(--female-border); }
.gender-badge.other { background: var(--other-bg); color: var(--text-light); border: 1px solid var(--other-border); }
.panel-dates { font-size: 14px; color: var(--text-light); margin-bottom: 10px; }
.panel-notes {
  font-size: 13px;
  color: var(--text-light);
  background: var(--bg);
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 14px;
  white-space: pre-wrap;
}
.panel-notes:empty { display: none; }
.panel-section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
  margin-bottom: 8px;
}
.rel-list {
  list-style: none;
  margin-bottom: 16px;
}
.rel-list li {
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.rel-list li:last-child { border-bottom: none; }
.rel-type-badge {
  font-size: 11px;
  background: var(--border);
  color: var(--text-light);
  padding: 2px 8px;
  border-radius: 10px;
  flex-shrink: 0;
}
.rel-name-link {
  color: var(--accent);
  cursor: pointer;
  font-weight: 500;
}
.rel-name-link:hover { text-decoration: underline; }
.panel-actions {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.panel-actions .btn { flex: 1; justify-content: center; }

/* ===== Modals ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--surface);
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  overflow: hidden;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h2 { font-size: 18px; font-weight: 700; }
.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-light);
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--border); color: var(--text); }
.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}
.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 14px;
  flex: 1;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 5px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 72px; }
.form-row {
  display: flex;
  gap: 12px;
}

/* ===== Photo + Name Row ===== */
.photo-name-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
}
.name-fields { flex: 1; min-width: 0; }
.name-fields .form-group { margin-bottom: 10px; }
.name-fields .form-group:last-child { margin-bottom: 0; }

/* ===== Photo Upload ===== */
.photo-upload-area {
  width: 88px;
  height: 88px;
  flex-shrink: 0;
  border: 2px dashed var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  background: var(--bg);
  transition: border-color 0.15s, background 0.15s;
}
.photo-upload-area:hover { border-color: var(--accent); background: #ebf4ff; }
.photo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  color: var(--text-light);
  font-size: 11px;
  text-align: center;
  padding: 0 4px;
}
.photo-placeholder span:first-child { font-size: 22px; }
.photo-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.photo-preview.hidden { display: none; }

/* ===== SVG Person Card Styles ===== */
.person-node { cursor: pointer; }
.person-node:hover .card-rect { filter: brightness(0.96); }
.person-node.highlighted .card-rect { stroke: #f6ad55 !important; stroke-width: 3 !important; }
.person-node.selected .card-rect { stroke: var(--accent) !important; stroke-width: 2.5 !important; }

/* ===== Search Autocomplete ===== */
.search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  left: 0;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 300;
  list-style: none;
  overflow: hidden;
  max-height: 260px;
  overflow-y: auto;
}
.search-dropdown.hidden { display: none; }
.search-dropdown-item {
  padding: 10px 14px;
  font-size: 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.search-dropdown-item:last-child { border-bottom: none; }
.search-dropdown-item:hover,
.search-dropdown-item.active { background: var(--bg); color: var(--accent); }

/* ===== Deceased checkbox ===== */
.form-check { margin-bottom: 14px; }
.check-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text);
}
.check-label input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

/* ===== Upcoming Events Widget ===== */
.upcoming-widget {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 230px;
  max-height: 230px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  z-index: 10;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.upcoming-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-light);
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--bg);
}
.upcoming-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
}
.upcoming-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}
.upcoming-item:last-child { border-bottom: none; }
.upcoming-item:hover { background: var(--bg); }
.upcoming-item-icon { font-size: 15px; flex-shrink: 0; }
.upcoming-item-info { flex: 1; min-width: 0; }
.upcoming-item-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.upcoming-item-sub { font-size: 11px; color: var(--text-light); }
.upcoming-item-days {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}
.upcoming-item-days.today { color: var(--accent); }
.upcoming-empty {
  padding: 14px 12px;
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 3px; }

.mobile-only { display: none; }

/* ===== Mobile ===== */
@media (max-width: 640px) {
  .mobile-only { display: inline-flex; }
  :root { --topbar-h: 56px; }

  /* ── Topbar ── */
  .topbar { padding: 0 10px; gap: 8px; height: var(--topbar-h); }
  .app-title { display: none; }
  .topbar-center { flex: 1; max-width: unset; }
  .topbar-right { margin-right: 0; gap: 6px; }
  .btn-label { display: none; }
  .btn { padding: 0; width: 44px; height: 44px; min-width: 44px; justify-content: center; border-radius: 12px; }
  .btn-icon { font-size: 20px; }
  .search-input { padding: 10px 14px; font-size: 16px; border-radius: 12px; }

  /* ── Tree canvas ── */
  #tree-svg { touch-action: none; }

  /* ── Person panel — tall bottom sheet ── */
  .person-panel {
    top: auto;
    bottom: 0; left: 0; right: 0;
    width: 100%;
    height: 82vh;
    border-right: none;
    border-top: 1px solid var(--border);
    border-radius: 24px 24px 0 0;
    box-shadow: 0 -8px 40px rgba(0,0,0,0.18);
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.32,0.72,0,1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  .person-panel.hidden { transform: translateY(100%); }

  /* Drag handle */
  .person-panel::before {
    content: '';
    display: block;
    flex-shrink: 0;
    width: 44px; height: 5px;
    background: var(--border);
    border-radius: 3px;
    margin: 12px auto 0;
  }

  /* Scrollable content, sticky actions */
  .panel-photo-wrap {
    flex-shrink: 0;
    flex-direction: row;
    padding: 14px 16px 14px 52px; /* left padding = space for close btn */
    gap: 14px;
    align-items: center;
  }
  .panel-photo-wrap-meta { display: block; flex: 1; min-width: 0; }
  /* hide duplicate name/dates from panel-body on mobile (they're in the header now) */
  .panel-name, .gender-badge, .panel-dates { display: none; }
  .panel-photo-wrap-meta .panel-name,
  .panel-photo-wrap-meta .gender-badge,
  .panel-photo-wrap-meta .panel-dates { display: block; }
  .panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 14px 16px;
    padding-bottom: 0;
    -webkit-overflow-scrolling: touch;
  }
  .panel-actions {
    flex-shrink: 0;
    display: flex;
    gap: 10px;
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    background: var(--surface);
  }
  .panel-actions .btn {
    flex: 1;
    width: auto;
    min-width: 0;
    height: 46px;
    font-size: 14px;
    border-radius: 12px;
  }
  .panel-close {
    top: 14px;
    left: 14px;
    width: 36px; height: 36px;
    font-size: 16px;
  }
  .panel-photo-overlay { opacity: 0.7; }
  .panel-photo, .panel-initials { width: 72px; height: 72px; }
  .panel-initials { font-size: 26px; }
  .panel-photo-edit { width: 72px; height: 72px; }
  .panel-name { font-size: 20px; margin-bottom: 4px; }
  .panel-dates { font-size: 13px; }
  .panel-section-title { font-size: 12px; margin-top: 4px; }

  /* Relationship list — bigger tap targets */
  .rel-list li {
    padding: 11px 0;
    font-size: 15px;
    gap: 10px;
  }
  .rel-name-link { font-size: 15px; }
  .rel-type-badge { font-size: 12px; padding: 3px 10px; }

  /* ── Modals — bottom sheet ── */
  .modal-overlay { align-items: flex-end; padding: 0; }
  .modal {
    border-radius: 24px 24px 0 0;
    max-height: 92vh;
    width: 100%;
    max-width: 100%;
  }
  .modal::before {
    content: '';
    display: block;
    flex-shrink: 0;
    width: 44px; height: 5px;
    background: var(--border);
    border-radius: 3px;
    margin: 12px auto 4px;
  }
  .modal-header { padding: 8px 18px 12px; }
  .modal-header h2 { font-size: 17px; }
  .modal-close { width: 36px; height: 36px; font-size: 16px; }
  .modal-body { padding: 12px 16px; }
  .modal-footer {
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    gap: 8px;
  }
  .modal-footer .btn { flex: 1; justify-content: center; height: 48px; font-size: 15px; border-radius: 12px; }

  /* ── Forms — stack rows vertically ── */
  .form-group { margin-bottom: 12px; }
  .form-group label { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 12px 14px;
    font-size: 16px; /* prevent iOS zoom */
    border-radius: 10px;
  }
  .form-group textarea { min-height: 60px; }
  .form-row { flex-direction: column; gap: 0; }

  /* ── Photo + name row ── */
  .photo-name-row { gap: 12px; margin-bottom: 12px; }
  .photo-upload-area { width: 80px; height: 80px; flex-shrink: 0; }
  .photo-placeholder { font-size: 10px; gap: 2px; }
  .photo-placeholder span:first-child { font-size: 20px; }

  /* ── Zoom controls — above bottom sheet area, left side ── */
  .zoom-controls { bottom: 16px; right: 16px; gap: 10px; }
  .zoom-btn { width: 52px; height: 52px; font-size: 24px; border-radius: 16px; }

  /* ── Legend — compact, positioned above zoom ── */
  .edge-legend { bottom: 200px; right: 16px; padding: 6px 10px; }
  .legend-item { font-size: 11px; gap: 6px; }

  /* ── Upcoming widget — hidden by default, toggled as bottom sheet ── */
  .upcoming-widget {
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-height: 50vh;
    border-radius: 24px 24px 0 0;
    border: none;
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 24px rgba(0,0,0,0.15);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.32,0.72,0,1);
    z-index: 95;
  }
  .upcoming-widget::before {
    content: '';
    display: block;
    flex-shrink: 0;
    width: 44px; height: 5px;
    background: var(--border);
    border-radius: 3px;
    margin: 12px auto 0;
  }
  .upcoming-widget.open { transform: translateY(0); }
  .upcoming-title { padding: 6px 16px 8px; font-size: 13px; }
  .upcoming-list { max-height: calc(50vh - 70px); }
  .upcoming-item { padding: 10px 16px; }
  .upcoming-item-name { font-size: 14px; }
  .upcoming-item-sub { font-size: 12px; }
  .upcoming-item-days { font-size: 12px; }
}

/* ===== Password Gate ===== */
#password-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
#password-gate.hidden { display: none; }
.password-box {
  background: var(--surface);
  border-radius: 20px;
  padding: 48px 40px;
  width: 380px;
  max-width: 92vw;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.password-box .tree-icon { font-size: 48px; }
.password-box h1 { font-size: 24px; font-weight: 700; color: var(--text); }
.password-box p { font-size: 14px; color: var(--text-light); margin-top: -12px; }
.password-box input[type="text"],
.password-box input[type="password"] {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 20px;
  text-align: center;
  outline: none;
  transition: border-color 0.2s;
  direction: rtl;
}
.password-box input[type="text"]:focus,
.password-box input[type="password"]:focus { border-color: var(--accent); }
.password-box input[type="text"].error,
.password-box input[type="password"].error { border-color: var(--red); animation: shake 0.3s ease; }
.password-box .btn-primary { width: 100%; padding: 16px; font-size: 18px; }
#password-error { font-size: 13px; color: var(--red); min-height: 18px; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}