/* Core theme variables (mirrors original) */
:root {
  --light-bg: #f5f5f5;
  --light-text: #333333;
  --dark-bg: #1c1c1c;
  --dark-text: #e0e0e0;
}

body,html {margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;}

/* Ensure any element with hidden attribute is fully removed from layout */
[hidden] { display: none !important; }

.app {display:flex;flex-direction:column;min-height:100vh;}
.app.light {background:var(--light-bg);color:var(--light-text);} 
.app.dark {background:var(--dark-bg);color:var(--dark-text);} 

.app-header {display:flex;justify-content:space-between;align-items:center;padding:10px 20px;border-bottom:1px solid #ccc;}
.app.dark .app-header {border-bottom-color:#555;}
.header-actions {display:flex;align-items:center;gap:1rem;}
.sync-indicator {font-size:.75rem;font-weight:600;padding:.35rem .7rem;border-radius:999px;background:#eef2ff;color:#1d4ed8;line-height:1;min-width:5.5rem;text-align:center;transition:background .2s ease,color .2s ease;}
.sync-indicator[data-status="saving"],
.sync-indicator[data-status="pending"] {background:#fff4ce;color:#8a6d3b;}
.sync-indicator[data-status="online"] {background:#dcfce7;color:#166534;}
.sync-indicator[data-status="offline"] {background:#fee2e2;color:#b91c1c;}
.sync-indicator[data-status="loading"] {background:#dbeafe;color:#1d4ed8;}
.app.dark .sync-indicator {background:rgba(255,255,255,.1);color:#93c5fd;}
.app.dark .sync-indicator[data-status="saving"],
.app.dark .sync-indicator[data-status="pending"] {background:rgba(253,224,71,.2);color:#facc15;}
.app.dark .sync-indicator[data-status="online"] {background:rgba(74,222,128,.25);color:#bbf7d0;}
.app.dark .sync-indicator[data-status="offline"] {background:rgba(248,113,113,.2);color:#fecaca;}
.app.dark .sync-indicator[data-status="loading"] {background:rgba(147,197,253,.2);color:#bfdbfe;}
.hamburger {display:none;font-size:24px;cursor:pointer;}

.add-task-btn {display:flex;align-items:center;gap:.5rem;background:#007bff;color:#fff;border:none;padding:.75rem 1rem;border-radius:8px;font-size:.9rem;cursor:pointer;}
.add-task-btn:hover {background:#0056b3;}
.app.dark .add-task-btn {background:#0056b3;} .app.dark .add-task-btn:hover {background:#004085;}
.theme-toggle {background:none;border:none;cursor:pointer;padding:.5rem;border-radius:50%;}
.theme-toggle:hover {background:rgba(0,0,0,.1);} .app.dark .theme-toggle:hover {background:rgba(255,255,255,.1);} 
.theme-toggle::before {content:"🌞";display:block;font-size:18px;}
.app.dark .theme-toggle::before {content:"🌙";}

.app-body {display:flex;flex:1;}
.sidebar {width:200px;border-right:1px solid #ccc;padding:20px;}
.app.dark .sidebar {border-right-color:#555;}
.sidebar ul {margin:0;padding:0;list-style:none;}
.sidebar li {padding:10px;cursor:pointer;border-radius:5px;}
.sidebar li:hover {background:#eee;} .app.dark .sidebar li:hover {background:#404040;}
.main-content {flex:1;padding:20px;overflow-y:auto;}

/* Filters */
.filters {display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:20px;align-items:flex-start;}
.filters select {padding:8px;}
.tag-filters {display:flex;flex-direction:column;gap:.5rem;}
.filter-label {font-weight:500;font-size:.9rem;}
.tag-filter-options {display:flex;flex-wrap:wrap;gap:.5rem;}
.tag-filter-btn, .clear-tags-btn {padding:.4rem .8rem;border:2px solid #e0e0e0;border-radius:20px;background:#fff;color:#666;cursor:pointer;font-size:.8rem;font-weight:500;}
.tag-filter-btn:hover {border-color:#007bff;background:#f8f9ff;}
.tag-filter-btn.active {background:#007bff;color:#fff;border-color:#007bff;}
.clear-tags-btn {border-color:#dc3545;color:#dc3545;}
.clear-tags-btn:hover {background:#dc3545;color:#fff;}
.app.dark .tag-filter-btn {background:#2a2a2a;border-color:#555;color:#aaa;}
.app.dark .tag-filter-btn:hover {border-color:#0056b3;background:#1a1a2e;}
.app.dark .tag-filter-btn.active {background:#0056b3;color:#fff;border-color:#0056b3;}
.app.dark .clear-tags-btn {background:#2a2a2a;}
.app.dark .clear-tags-btn:hover {background:#dc3545;}

/* Board */
.task-board {display:flex;gap:20px;align-items:flex-start;min-width:min-content;overflow-x:auto;}
.task-column {flex:1;min-width:360px;background:#f1f1f1;padding:15px;border-radius:5px;}
.app.dark .task-column {background:#2a2a2a;}
.task-column h2 {margin-top:0;padding-bottom:10px;border-bottom:1px solid #ddd;display:flex;align-items:center;gap:.5rem;cursor:pointer;user-select:none;}
.app.dark .task-column h2 {border-bottom-color:#444;}
.task-count {font-size:.8em;font-weight:normal;color:#666;background:#f0f0f0;padding:.2rem .5rem;border-radius:12px;min-width:1.5rem;text-align:center;}
.app.dark .task-count {color:#aaa;background:#404040;}
.task-list .task-item {padding:15px;border:1px solid #ccc;border-radius:5px;margin-bottom:10px;background:#fff;animation:fadeIn .5s;} 
.app.dark .task-item {background:#2a2a2a;border-color:#555;}

/* Task item */
.task-item {overflow:hidden;transition:all .3s ease;}
.task-item.collapsed .task-content {display:none;}
.task-header {display:flex;justify-content:space-between;align-items:center;cursor:pointer;padding-bottom:.5rem;border-bottom:1px solid #eee;margin-bottom:.5rem;}
.app.dark .task-header {border-bottom-color:#555;}
.task-header h3 {margin:0;font-size:1.1em;}
.task-description {min-height:60px;max-height:200px;overflow-y:auto;padding:10px;border:1px solid #eee;border-radius:4px;background:#f9f9f9;margin-bottom:10px;line-height:1.4;white-space:pre-wrap;}
.app.dark .task-description {background:#1a1a1a;border-color:#404040;color:var(--dark-text);}
.tags .tag {padding:3px 8px;border-radius:3px;background:#eee;margin-right:5px;font-size:12px;}
.app.dark .tags .tag {background:#404040;color:var(--dark-text);}
.task-actions {margin-top:10px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;}
.status-buttons {display:flex;gap:5px;}
.status-btn {background:#e9ecef;border:1px solid #dee2e6;padding:5px 10px;border-radius:4px;cursor:pointer;}
.status-btn.active[data-status="Done"] {background:#4FFF72;color:#000;border-color:#4FFF72;}
.status-btn.active[data-status="In Progress"] {background:#BF9346;color:#fff;border-color:#BF9346;}

/* Modal */
.modal-overlay {position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;}
.modal-content {background:var(--light-bg);border-radius:12px;width:100%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:0 10px 30px rgba(0,0,0,.2);} 
.app.dark .modal-content {background:var(--dark-bg);color:var(--dark-text);} 
.modal-header {display:flex;justify-content:space-between;align-items:center;padding:1.5rem 1.5rem 0 1.5rem;border-bottom:1px solid #e0e0e0;margin-bottom:1.5rem;} 
.app.dark .modal-header {border-bottom-color:#404040;} 
.modal-body {padding:0 1.5rem 1.5rem 1.5rem;} 
.form-group {margin-bottom:1rem;} 
.form-row {display:grid;grid-template-columns:1fr 1fr;gap:1rem;} 
.form-group label {display:block;margin-bottom:.5rem;font-weight:500;} 
.form-group input, .form-group textarea, .form-group select {width:100%;padding:.75rem;border:1px solid #d0d0d0;border-radius:6px;font-size:.9rem;background:#fff;color:inherit;}
.form-group textarea {resize:vertical;min-height:80px;} 
.error-message {color:#dc3545;font-size:.8rem;margin-top:.25rem;display:block;} 
.modal-actions {display:flex;justify-content:flex-end;gap:.75rem;margin-top:1.5rem;padding-top:1rem;border-top:1px solid #e0e0e0;} 
.btn-cancel,.btn-primary {padding:.75rem 1.5rem;border-radius:6px;font-size:.9rem;cursor:pointer;border:none;} 
.btn-cancel {background:#f8f9fa;color:#6c757d;border:1px solid #d0d0d0;} 
.btn-primary {background:#007bff;color:#fff;} 
.btn-cancel:hover {background:#e9ecef;} 
.btn-primary:hover {background:#0056b3;} 

/* Settings / Stats */
.settings-section,.statistics-section {margin-bottom:30px;padding:20px;border:1px solid #ccc;border-radius:5px;background:#fff;} 
.app.dark .settings-section, .app.dark .statistics-section {background:#2a2a2a;border-color:#555;} 
.add-item-form {display:flex;gap:10px;margin-bottom:20px;} 
.add-item-form input {flex:1;} 
.add-btn {background:#007bff;color:#fff;border:none;border-radius:5px;padding:8px 12px;cursor:pointer;display:flex;align-items:center;justify-content:center;min-width:40px;min-height:40px;} 
.add-btn:hover {background:#0056b3;} 
.items-list {display:flex;flex-wrap:wrap;gap:10px;} 
.item-pill {display:flex;align-items:center;background:#f1f1f1;border-radius:15px;padding:5px 12px;font-size:14px;} 
.item-pill span {margin-right:8px;} 
.delete-btn {background:none;border:none;color:#999;cursor:pointer;font-size:18px;line-height:1;padding:0;} 
.delete-btn:hover {color:#dc3545;} 

.summary-card {display:flex;justify-content:space-around;background:#f9f9f9;padding:20px;border-radius:5px;margin-bottom:20px;} 
.app.dark .summary-card {background:#2a2a2a;} 
.charts {display:flex;justify-content:space-around;flex-wrap:wrap;gap:20px;} 
.chart {text-align:center;}

/* Responsive */
@media (max-width:768px){
  .hamburger {display:block;}
  .sidebar {position:fixed;top:0;left:-250px;width:250px;height:100%;background:var(--light-bg);z-index:1000;padding-top:60px;transition:left .3s ease;}
  .app.dark .sidebar {background:var(--dark-bg);} 
  .sidebar.open {left:0;}
  .overlay {position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:999;} 
  .task-board {flex-direction:column;gap:10px;} 
  .form-row {grid-template-columns:1fr;} 
}

@keyframes fadeIn {from{opacity:0} to{opacity:1}}