/* ============================================================
   NCLEX Pro LMS — Components CSS
   Buttons, Cards, Forms, Badges, Modals, Alerts, Tables
   ============================================================ */

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--transition-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.05); }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { box-shadow: 0 6px 28px rgba(79,142,247,0.45); transform: translateY(-1px); color: #fff; }

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: var(--text-inverse);
  box-shadow: var(--shadow-accent);
}
.btn-accent:hover { box-shadow: 0 6px 28px rgba(0,212,180,0.4); transform: translateY(-1px); color: var(--text-inverse); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color-hover);
  color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-glow); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 14px;
}
.btn-ghost:hover { background: var(--color-bg-hover); color: var(--text-primary); }

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #D44444);
  color: #fff;
}
.btn-danger:hover { box-shadow: 0 4px 20px var(--color-danger-glow); transform: translateY(-1px); }

.btn-success {
  background: linear-gradient(135deg, var(--color-success), #2AB578);
  color: var(--text-inverse);
}

.btn-sm { padding: 7px 14px; font-size: 0.82rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-icon { width: 38px; height: 38px; padding: 0; justify-content: center; border-radius: var(--radius-md); }
.btn-full { width: 100%; justify-content: center; }

.btn:disabled, .btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Loading spinner on button */
.btn.loading { pointer-events: none; }
.btn.loading::before {
  content: '';
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-right: var(--space-2);
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
}

.card-hover:hover {
  transform: translateY(-2px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg);
}

.card-primary {
  border-color: var(--border-primary);
  background: linear-gradient(135deg, rgba(79,142,247,0.08), rgba(20,28,48,0.7));
}

.card-accent {
  border-color: var(--border-accent);
  background: linear-gradient(135deg, rgba(0,212,180,0.08), rgba(20,28,48,0.7));
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

/* ── Stat Cards ──────────────────────────────────────────── */
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.stat-card .stat-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: var(--space-2);
}

.stat-card .stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
}

.stat-card .stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.stat-card .stat-change {
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.stat-card .stat-change.up   { color: var(--color-success); }
.stat-card .stat-change.down { color: var(--color-danger); }

/* Gradient glows on stat cards */
.stat-card.blue .stat-icon   { background: var(--color-primary-glow); color: var(--color-primary); }
.stat-card.teal .stat-icon   { background: var(--color-accent-glow); color: var(--color-accent); }
.stat-card.amber .stat-icon  { background: var(--color-warning-glow); color: var(--color-warning); }
.stat-card.red .stat-icon    { background: var(--color-danger-glow); color: var(--color-danger); }
.stat-card.purple .stat-icon { background: rgba(167,139,250,0.15); color: var(--color-purple); }
.stat-card.green .stat-icon  { background: var(--color-success-glow); color: var(--color-success); }

/* ── Forms ───────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-label .required { color: var(--color-danger); margin-left: 2px; }

.form-control {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition-fast);
  appearance: none;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(79,142,247,0.05);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-control::placeholder { color: var(--text-muted); }

.form-control:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select.form-control {
  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='%239BA8C4' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

textarea.form-control { resize: vertical; min-height: 100px; }

.form-control-lg { padding: 14px 16px; font-size: 1rem; }
.form-control-sm { padding: 8px 12px; font-size: 0.85rem; }

.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: var(--space-1); }
.form-error { font-size: 0.8rem; color: var(--color-danger); margin-top: var(--space-1); }

.form-control.is-invalid { border-color: var(--color-danger); }
.form-control.is-valid   { border-color: var(--color-success); }

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.form-check-label { font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; }

/* Toggle switch */
.toggle {
  position: relative;
  width: 44px; height: 24px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--color-bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-normal);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 2px; top: 50%;
  transform: translateY(-50%);
  background: var(--text-muted);
  border-radius: 50%;
  transition: var(--transition-normal);
}
.toggle input:checked ~ .toggle-slider { background: var(--color-primary); border-color: var(--color-primary); }
.toggle input:checked ~ .toggle-slider::before { transform: translate(20px, -50%); background: #fff; }

/* Input group */
.input-group {
  display: flex;
  gap: 0;
}
.input-group .form-control { border-radius: var(--radius-md) 0 0 var(--radius-md); }
.input-group .btn          { border-radius: 0 var(--radius-md) var(--radius-md) 0; }
.input-group-text {
  display: flex;
  align-items: center;
  padding: 0 14px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary { background: var(--color-primary-glow); color: var(--color-primary); border: 1px solid rgba(79,142,247,0.2); }
.badge-accent  { background: var(--color-accent-glow); color: var(--color-accent); border: 1px solid rgba(0,212,180,0.2); }
.badge-success { background: var(--color-success-glow); color: var(--color-success); border: 1px solid rgba(61,213,152,0.2); }
.badge-danger  { background: var(--color-danger-glow); color: var(--color-danger); border: 1px solid rgba(247,107,107,0.2); }
.badge-warning { background: var(--color-warning-glow); color: var(--color-warning); border: 1px solid rgba(255,184,48,0.2); }
.badge-purple  { background: rgba(167,139,250,0.15); color: var(--color-purple); border: 1px solid rgba(167,139,250,0.2); }
.badge-secondary { background: rgba(255,255,255,0.06); color: var(--text-secondary); border: 1px solid var(--border-color); }

.badge-lg { padding: 5px 14px; font-size: 0.82rem; }
.badge-dot::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ── Alerts / Flash ──────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: 0.9rem;
  border-left: 3px solid;
  animation: slideInDown 0.3s ease;
}

.alert-success { background: var(--color-success-glow); border-color: var(--color-success); color: var(--color-success); }
.alert-error   { background: var(--color-danger-glow);  border-color: var(--color-danger);  color: var(--color-danger); }
.alert-info    { background: var(--color-primary-glow); border-color: var(--color-primary); color: var(--color-primary); }
.alert-warning { background: var(--color-warning-glow); border-color: var(--color-warning); color: var(--color-warning); }

/* ── Tables ──────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: var(--glass-border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.table thead {
  background: rgba(255,255,255,0.03);
}
.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}
.table td {
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}
.table tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: rgba(255,255,255,0.025); }
.table td strong { color: var(--text-primary); }

.table-striped tbody tr:nth-child(odd) { background: rgba(255,255,255,0.015); }

/* ── Modals ──────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
}
.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
  background: var(--color-bg-card);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(20px);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-xl);
}
.modal-overlay.active .modal { transform: scale(1) translateY(0); }
.modal-lg { max-width: 800px; }
.modal-xl { max-width: 1000px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}
.modal-title { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; margin: 0; }
.modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 1.2rem;
  padding: var(--space-2); border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  line-height: 1;
}
.modal-close:hover { background: var(--color-bg-hover); color: var(--text-primary); }

.modal-footer {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-color);
}

/* ── Progress Bars ───────────────────────────────────────── */
.progress {
  height: 8px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.progress-bar::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s infinite;
}

.progress-success .progress-bar { background: var(--color-success); }
.progress-danger  .progress-bar { background: var(--color-danger); }
.progress-warning .progress-bar { background: var(--color-warning); }

.progress-lg { height: 12px; }
.progress-sm { height: 4px; }

/* ── Tabs ────────────────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  overflow-x: auto;
}
.tab-btn {
  padding: 10px 18px;
  background: none; border: none; cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.tab-btn:hover  { color: var(--text-secondary); }
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.25s ease; }

/* ── Avatars ─────────────────────────────────────────────── */
.avatar { border-radius: 50%; object-fit: cover; }
.avatar-initials {
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.avatar-group .avatar, .avatar-group .avatar-initials {
  border: 2px solid var(--color-bg-dark);
  margin-left: -8px;
}
.avatar-group .avatar:first-child,.avatar-group .avatar-initials:first-child { margin-left: 0; }

/* ── Tooltips ────────────────────────────────────────────── */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-elevated);
  color: var(--text-primary);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: var(--transition-fast);
  z-index: 100;
  border: var(--glass-border);
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Dropdowns ───────────────────────────────────────────── */
.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px); right: 0;
  background: var(--color-bg-card);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  min-width: 180px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition-normal);
}
.dropdown.open .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }

.dropdown-item {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  border: none; background: none; width: 100%; text-align: left;
}
.dropdown-item:hover { background: var(--color-bg-hover); color: var(--text-primary); }
.dropdown-item.danger:hover { color: var(--color-danger); background: var(--color-danger-glow); }
.dropdown-divider { height: 1px; background: var(--border-color); margin: var(--space-2) 0; }

/* ── Domain Color Pillars ────────────────────────────────── */
.domain-safe     { --domain-color: var(--color-primary); }
.domain-health   { --domain-color: var(--color-accent); }
.domain-psycho   { --domain-color: var(--color-purple); }
.domain-physio   { --domain-color: var(--color-warning); }

.domain-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.74rem;
  font-weight: 700;
  background: rgba(128,128,128,0.1);
  color: var(--domain-color, var(--text-muted));
  border: 1px solid rgba(128,128,128,0.15);
}

/* ── Score Ring ──────────────────────────────────────────── */
.score-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.score-ring svg circle { transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1); }
.score-ring .score-value {
  position: absolute;
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--text-primary);
}

/* ── Animations ──────────────────────────────────────────── */
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes shimmer {
  from { transform: translateX(-200%); }
  to   { transform: translateX(200%); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideInDown {
  from { transform: translateY(-12px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes slideInUp {
  from { transform: translateY(12px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes bounceIn {
  0%   { transform: scale(0.5); opacity: 0; }
  70%  { transform: scale(1.06); }
  100% { transform: scale(1); opacity: 1; }
}

.animate-fade-in    { animation: fadeIn 0.4s ease; }
.animate-slide-up   { animation: slideInUp 0.4s ease; }
.animate-slide-down { animation: slideInDown 0.4s ease; }
.animate-bounce-in  { animation: bounceIn 0.5s ease; }
.animate-pulse      { animation: pulse 2s infinite; }

/* ── Utility Classes ─────────────────────────────────────── */
.text-primary   { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted     { color: var(--text-muted) !important; }
.text-success   { color: var(--color-success) !important; }
.text-danger    { color: var(--color-danger) !important; }
.text-warning   { color: var(--color-warning) !important; }
.text-accent    { color: var(--color-accent) !important; }
.text-blue      { color: var(--color-primary) !important; }
.text-center    { text-align: center; }
.text-right     { text-align: right; }
.text-sm        { font-size: 0.85rem; }
.text-xs        { font-size: 0.76rem; }
.font-bold      { font-weight: 700; }
.font-heading   { font-family: var(--font-heading); }

.d-flex    { display: flex; }
.d-grid    { display: grid; }
.d-block   { display: block; }
.d-none    { display: none; }
.d-inline  { display: inline; }
.d-inline-flex { display: inline-flex; }

.align-center  { align-items: center; }
.align-start   { align-items: flex-start; }
.align-end     { align-items: flex-end; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.justify-end     { justify-content: flex-end; }
.flex-wrap     { flex-wrap: wrap; }
.flex-col      { flex-direction: column; }
.flex-1        { flex: 1; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.ml-auto { margin-left: auto; }

.p-4  { padding: var(--space-4); }
.p-5  { padding: var(--space-5); }
.p-6  { padding: var(--space-6); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.rounded  { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-5) 0;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-elevated) 25%, var(--color-bg-hover) 50%, var(--color-bg-elevated) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* Icon sizing helpers */
.icon-sm { font-size: 1rem; }
.icon-md { font-size: 1.25rem; }
.icon-lg { font-size: 1.5rem; }
.icon-xl { font-size: 2rem; }

/* Glow effects */
.glow-primary { box-shadow: 0 0 20px var(--color-primary-glow); }
.glow-accent  { box-shadow: 0 0 20px var(--color-accent-glow); }
.glow-success { box-shadow: 0 0 20px var(--color-success-glow); }