/* ============================================
   STUDYHUB COMPONENT CLASSES
   Additional components for StudyHub templates
   ============================================ */

/* Icon Size Utilities */
.icon-xs { width: 14px; height: 14px; stroke-width: 2; }
.icon-sm { width: 16px; height: 16px; stroke-width: 2; }
.icon-md { width: 20px; height: 20px; stroke-width: 2; }
.icon-lg { width: 24px; height: 24px; stroke-width: 2; }
.icon-xl { width: 32px; height: 32px; stroke-width: 1.5; }

[data-lucide] {
  display: inline-block;
  vertical-align: middle;
}

/* Text Size Utilities */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }

/* Line Clamp Utilities */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-4 {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Container Aliases */
.container-studyhub {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Card Aliases */
.card-studyhub {
  background-color: white;
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-100);
}

.card-studyhub .card-header {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--space-4);
}

.card-studyhub .card-body {
  color: var(--color-slate-graphite);
  font-size: var(--text-base);
}

.card-studyhub .card-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.card-studyhub.hover-lift:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-title {
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-midnight-blue);
  margin-bottom: var(--space-3);
}

/* Badge Aliases */
.badge-studyhub {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: 1;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-studyhub.badge-primary {
  background-color: #E0F2FE;
  color: #075985;
}

.badge-studyhub.badge-success {
  background-color: #D1FAE5;
  color: var(--color-success-green);
}

.badge-studyhub.badge-warning {
  background-color: #FEF3C7;
  color: #B45309;
}

.badge-studyhub.badge-neutral {
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
}

.badge-studyhub.badge-outline {
  background-color: transparent;
  border: 1px solid var(--color-gray-300);
  color: var(--color-slate-graphite);
}

.badge-studyhub.badge-sm {
  padding: 2px var(--space-2);
  font-size: 0.65rem;
}

/* Button Outline */
.btn-outline {
  background-color: white;
  color: var(--color-midnight-blue);
  border: 1.5px solid var(--color-gray-300);
  box-shadow: var(--shadow-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-base);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--color-midnight-blue);
  background-color: var(--color-gray-50);
  box-shadow: var(--shadow-sm);
}

.btn-outline.active {
  background-color: var(--color-midnight-blue);
  color: white;
  border-color: var(--color-midnight-blue);
}

/* Grid Aliases */
.grid-studyhub {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Flex Aliases */
.flex-row {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-wrap {
  flex-wrap: wrap;
}

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

/* Input Aliases */
.input-group-studyhub {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group-studyhub i[data-lucide] {
  position: absolute;
  left: var(--space-3);
  pointer-events: none;
  z-index: 1;
}

.input-studyhub {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  color: var(--color-gray-800);
  background-color: white;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
  outline: none;
}

.input-studyhub:focus {
  border-color: var(--color-sky-mint);
  box-shadow: 0 0 0 3px rgba(86, 224, 197, 0.1);
}

.select-studyhub {
  width: 100%;
  padding: var(--space-3) var(--space-10) var(--space-3) var(--space-10);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  color: var(--color-gray-800);
  background-color: white;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
  outline: none;
  cursor: pointer;
}

.select-studyhub:focus {
  border-color: var(--color-sky-mint);
  box-shadow: 0 0 0 3px rgba(86, 224, 197, 0.1);
}

/* Link Aliases */
.link-studyhub {
  color: var(--color-midnight-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: var(--font-medium);
}

.link-studyhub:hover {
  color: var(--color-sky-mint);
}

/* Tabs Aliases */
.tabs-studyhub {
  display: flex;
  gap: var(--space-2);
  border-bottom: 2px solid var(--color-gray-200);
}

.tabs-studyhub .tab {
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--color-slate-graphite);
  text-decoration: none;
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.tabs-studyhub .tab:hover {
  color: var(--color-midnight-blue);
  border-bottom-color: var(--color-gray-300);
}

.tabs-studyhub .tab.active {
  color: var(--color-midnight-blue);
  border-bottom-color: var(--color-sky-mint);
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-4);
}

.info-item {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.info-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-value {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-midnight-blue);
}

/* Alert Aliases */
.alert-studyhub {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-base);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.alert-studyhub.alert-success {
  background-color: #D1FAE5;
  color: #065F46;
  border-left: 4px solid var(--color-success-green);
}

.alert-studyhub.alert-warning {
  background-color: #FEF3C7;
  color: #92400E;
  border-left: 4px solid var(--color-warning-amber);
}

.alert-studyhub.alert-danger {
  background-color: #FEE2E2;
  color: #991B1B;
  border-left: 4px solid var(--color-trust-red);
}

.alert-studyhub.alert-info {
  background-color: #E0F2FE;
  color: #075985;
  border-left: 4px solid var(--color-sky-mint);
}

/* Pagination Aliases */
.pagination-studyhub {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-base);
  color: var(--color-slate-graphite);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination-link:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-midnight-blue);
  color: var(--color-midnight-blue);
}

.pagination-info {
  padding: 0 var(--space-4);
  color: var(--color-slate-graphite);
  font-size: var(--text-sm);
}

/* Modal Aliases */
.modal-studyhub {
  border: none;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  background-color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 0;
}

.modal-studyhub::backdrop {
  background-color: rgba(26, 42, 66, 0.4);
  backdrop-filter: blur(4px);
}

.modal-studyhub .modal-content {
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-studyhub .modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-studyhub .modal-title {
  font-family: var(--font-accent);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-midnight-blue);
  margin: 0;
}

.modal-studyhub .modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-slate-graphite);
  transition: color var(--transition-fast);
}

.modal-studyhub .modal-close:hover {
  color: var(--color-midnight-blue);
}

.modal-studyhub .modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

/* Skeleton Loader Aliases */
.skeleton-loader {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-base);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-3);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
}

.empty-state-icon {
  font-size: 4rem;
  color: var(--color-gray-300);
  margin-bottom: var(--space-6);
}

.empty-state-icon i[data-lucide] {
  width: 64px;
  height: 64px;
}

.empty-state-title {
  font-family: var(--font-accent);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-midnight-blue);
  margin-bottom: var(--space-3);
}

.empty-state-description {
  font-size: var(--text-base);
  color: var(--color-slate-graphite);
  margin-bottom: var(--space-6);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--space-8);
}

.page-title {
  font-family: var(--font-accent);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-midnight-blue);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.page-subtitle {
  font-size: var(--text-lg);
  color: var(--color-slate-graphite);
  margin: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .grid-studyhub {
    grid-template-columns: 1fr;
  }

  .grid-cols-2 {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    gap: var(--space-4);
  }

  .flex-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .container-studyhub {
    padding: 0 var(--space-4);
  }
}

/* User Dropdown Menu Styles */
#user-dropdown {
    box-shadow: var(--shadow-xl) !important;
}

#user-dropdown p {
    margin: 0;
    line-height: 1.4;
}

#user-dropdown .badge {
    display: inline-block;
    margin-top: var(--space-2);
}

#user-dropdown a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
    text-decoration: none;
    color: var(--color-slate-graphite);
}

#user-dropdown a:hover {
    background-color: var(--color-gray-50);
    color: var(--color-midnight-blue);
}

#user-dropdown hr {
    margin: var(--space-2) 0;
    border: none;
    border-top: 1px solid var(--color-gray-200);
}

/* ==============================
   Dashboard & Utility Enhancements
   ============================== */
/* Flex utilities */
.flex-col { display: flex; flex-direction: column; }
.flex-1 { flex: 1 1 0%; }
.min-w-0 { min-width: 0; }
.flex-row-start { display: flex; flex-direction: row; align-items: center; }
.flex-row-between { display: flex; flex-direction: row; justify-content: space-between; align-items: center; }
.flex-row-between-start { display: flex; flex-direction: row; justify-content: space-between; align-items: flex-start; }
.flex-row-between-wrap { display: flex; flex-direction: row; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.justify-start { justify-content: flex-start; }
.w-full { width: 100%; }

/* Spacing utilities */
.mb-2 { margin-bottom: var(--space-2); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-4 { margin-top: var(--space-4); }
.pl-3 { padding-left: var(--space-3); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.gap-6 { gap: var(--space-6); }

/* Width & layout helpers */
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-400 { max-width: 400px; }

/* Text & overflow helpers */
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Borders */
.border-top { border-top: 1px solid var(--color-gray-200); }
.accent-stroke { border-left: 3px solid var(--color-sky-mint); }

/* Dashboard grids */
.dashboard-layout { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
.dashboard-stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--space-6); }
.sidebar-stack { display: grid; grid-auto-rows: min-content; gap: var(--space-6); }

@media (min-width: 1024px) {
  .dashboard-layout { grid-template-columns: 1fr 340px; }
}

/* Task list visuals */
.task-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--color-midnight-blue), var(--color-sky-mint));
  border-radius: var(--radius-base);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.task-meta { display: flex; flex-wrap: wrap; gap: var(--space-4); font-size: var(--text-sm); color: var(--color-slate-graphite); }
.task-meta .meta-item { display: flex; align-items: center; gap: var(--space-1); }

/* Stat card visuals */
.gradient-midnight { background: linear-gradient(135deg, var(--color-midnight-blue), var(--color-midnight-blue-dark)); color: white; }
.gradient-mint { background: linear-gradient(135deg, var(--color-sky-mint), var(--color-sky-mint-dark)); }
.gradient-mint-faint { background: linear-gradient(135deg, rgba(26,42,66,0.02), rgba(86,224,197,0.05)); }
.gradient-mint-solid { background: linear-gradient(135deg, var(--color-sky-mint), var(--color-sky-mint-light)); }
.no-border { border: none !important; }
.text-midnight { color: var(--color-midnight-blue); }
.text-white { color: #fff; }
.text-slate-graphite { color: var(--color-slate-graphite); }
.text-success { color: var(--color-success-green); }
.stat-icon-bg { width: 56px; height: 56px; background-color: rgba(255,255,255,0.1); border-radius: var(--radius-lg); display:flex; align-items:center; justify-content:center; }
.stat-icon-bg.mint-alt { background-color: rgba(26,42,66,0.1); }
.stat-icon-bg.success-alt { background-color: rgba(11,183,131,0.1); }

/* Quick actions spacing */
.quick-actions .btn-ghost {
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-base);
}
.quick-actions .btn-ghost i[data-lucide] { margin-right: var(--space-2); }
.quick-actions .btn-ghost + .btn-ghost { margin-top: var(--space-2); }

/* HTMX indicator behavior */
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator { display: inline-flex; align-items: center; gap: var(--space-2); }
.indicator-dot {
  width: 8px; height: 8px; border-radius: 50%; background-color: var(--color-sky-mint);
  box-shadow: 0 0 0 0 rgba(86,224,197,0.7);
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(86,224,197,0.7); }
  70% { box-shadow: 0 0 0 8px rgba(86,224,197,0); }
  100% { box-shadow: 0 0 0 0 rgba(86,224,197,0); }
}

/* Mobile-first responsiveness tweaks */
@media (max-width: 640px) {
  .dashboard-stats-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .page-header { padding: var(--space-6) 0; }
  .tabs-studyhub { overflow-x: auto; white-space: nowrap; gap: var(--space-1); -webkit-overflow-scrolling: touch; scrollbar-width: thin; }
  .tabs-studyhub .tab { flex: 0 0 auto; padding: var(--space-2) var(--space-3); }
  .task-meta { gap: var(--space-3); }
  .icon-xl { width: 28px; height: 28px; }
  .card { padding: var(--space-5); }
}

/* Improve tap responsiveness on interactive elements */
.tabs-studyhub .tab, .btn, .btn-ghost, .btn-secondary, .btn-primary { touch-action: manipulation; }

/* ============================================
   CIRCLE ICON CONTAINERS
   ============================================ */
.circle-md {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.circle-lg {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.circle-xl {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Gradient backgrounds for circles */
.gradient-success-soft {
  background: linear-gradient(135deg, rgba(11, 183, 131, 0.1), rgba(11, 183, 131, 0.05));
}

.gradient-warning-soft {
  background: linear-gradient(135deg, rgba(255, 201, 74, 0.1), rgba(255, 201, 74, 0.05));
}

.gradient-primary-soft {
  background: linear-gradient(135deg, rgba(26, 42, 66, 0.1), rgba(26, 42, 66, 0.05));
}

.gradient-mint-soft {
  background: linear-gradient(135deg, rgba(86, 224, 197, 0.1), rgba(86, 224, 197, 0.05));
}

/* ============================================
   MAX-WIDTH UTILITIES
   ============================================ */
.max-w-sm { max-width: 384px; }
.max-w-md { max-width: 448px; }
.max-w-lg { max-width: 512px; }
.max-w-xl { max-width: 576px; }
.max-w-2xl { max-width: 672px; }
.max-w-3xl { max-width: 768px; }
.max-w-4xl { max-width: 896px; }

/* ============================================
   BACKGROUND COLOR UTILITIES
   ============================================ */
.bg-success-light {
  background-color: rgba(11, 183, 131, 0.08);
}

.bg-warning-light {
  background-color: rgba(255, 201, 74, 0.08);
}

.bg-primary-light {
  background-color: rgba(26, 42, 66, 0.05);
}

.bg-mint-light {
  background-color: rgba(86, 224, 197, 0.08);
}

/* ============================================
   SPACING & LAYOUT UTILITIES
   ============================================ */
.space-y-3 > * + * {
  margin-top: 0.75rem;
}

.space-y-4 > * + * {
  margin-top: 1rem;
}

.py-12 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.p-3 {
  padding: 0.75rem;
}

.gap-3 {
  gap: 0.75rem;
}

.mt-8 {
  margin-top: 2rem;
}

/* ============================================
   TEXT COLOR UTILITIES (Extended)
   ============================================ */
.text-mint {
  color: var(--color-sky-mint);
}

.text-info {
  color: #3B82F6;
}

.text-secondary {
  color: var(--color-slate-graphite);
}

/* ============================================
   BORDER UTILITIES (Extended)
   ============================================ */
.border-bottom {
  border-bottom: 1px solid var(--color-gray-200);
}

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

/* ============================================
   FLEXBOX UTILITIES (Extended)
   ============================================ */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-row {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.items-center {
  align-items: center;
}

.w-full {
  width: 100%;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   FONT UTILITIES
   ============================================ */
.font-semibold {
  font-weight: 600;
}

.font-medium {
  font-weight: 500;
}

.font-bold {
  font-weight: 700;
}

/* ============================================
   BORDER UTILITIES
   ============================================ */
.border-left-success {
  border-left: 4px solid var(--color-success-green);
}

.border-left-danger {
  border-left: 4px solid var(--color-trust-red);
}

.border-left-warning {
  border-left: 4px solid var(--color-warning-amber);
}

.border-left-info {
  border-left: 4px solid var(--color-sky-mint);
}

.border-left-primary {
  border-left: 4px solid var(--color-midnight-blue);
}

/* ============================================
   BACKGROUND UTILITIES (Light variants for alerts)
   ============================================ */
.bg-success-light {
  background-color: rgba(11, 183, 131, 0.08);
}

.bg-danger-light {
  background-color: rgba(229, 84, 84, 0.08);
}

.bg-warning-light {
  background-color: rgba(255, 201, 74, 0.08);
}

.bg-info-light {
  background-color: rgba(86, 224, 197, 0.08);
}

.bg-primary-light {
  background-color: rgba(26, 42, 66, 0.05);
}