/* ==========================================================================
   Light Clean Theme Design System - Task Management System (Lao)
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-page: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-subtle: #F1F5F9;
    --border-color: #E2E8F0;
    --border-focus: #2563EB;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    
    --primary-color: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #EFF6FF;
    
    --success-color: #10B981;
    --success-bg: #ECFDF5;
    --warning-color: #F59E0B;
    --warning-bg: #FFFBEB;
    --danger-color: #EF4444;
    --danger-bg: #FEF2F2;
    --info-color: #3B82F6;
    --info-bg: #EFF6FF;
    
    /* Typography */
    --font-family: 'Noto Sans Lao', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Elevation & Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Layout Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.required { color: var(--danger-color); font-weight: bold; }
.divider { border: 0; height: 1px; background: var(--border-color); margin: 16px 0; }
.col-span-2 { grid-column: span 2; }

/* Navbar */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary-color), #3B82F6);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.brand-text h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.brand-text .subtitle {
    font-size: 12px;
    color: var(--text-muted);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    width: 280px;
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background-color: var(--bg-subtle);
    font-family: var(--font-family);
    font-size: 13.5px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    background-color: white;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* Access Tag & Admin Badge */
.access-tag {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.access-tag.read-only {
    background-color: #FEF3C7;
    color: #92400E;
    border: 1px solid #FCD34D;
}

.access-tag.admin {
    background-color: var(--success-bg);
    color: #065F46;
    border: 1px solid #6EE7B7;
}

.admin-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--primary-light);
    border: 1px solid #BFDBFE;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--success-color);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.btn-logout {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.btn-logout:hover {
    color: var(--danger-color);
    background-color: var(--danger-bg);
}

/* Main Layout */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Alert Banner */
.alert-banner {
    background-color: #EFF6FF;
    border: 1px solid #BFDBFE;
    color: #1E40AF;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

/* Dashboard Overview Cards */
.dashboard-overview {
    background-color: var(--bg-card);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.metric-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
}

.card-total::before { background-color: #3B82F6; }
.card-completed::before { background-color: var(--success-color); }
.card-tracked::before { background-color: #8B5CF6; }
.card-urgent::before { background-color: var(--danger-color); }

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-total .metric-icon { background-color: #EFF6FF; color: #2563EB; }
.card-completed .metric-icon { background-color: var(--success-bg); color: var(--success-color); }
.card-tracked .metric-icon { background-color: #F3E8FF; color: #7C3AED; }
.card-urgent .metric-icon { background-color: var(--danger-bg); color: var(--danger-color); }

.metric-info {
    flex-grow: 1;
}

.metric-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.metric-info h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-top: 2px;
}

.metric-progress-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    width: 80px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--success-color);
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

.percent-text {
    font-size: 11px;
    font-weight: 700;
    color: var(--success-color);
}

/* Task Management Toolbar & Tabs */
.task-management-section {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.tabs-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tab-btn {
    background: none;
    border: 1px solid transparent;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.tab-btn:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-color: #BFDBFE;
}

.tab-count {
    background-color: var(--bg-subtle);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.tab-btn.active .tab-count {
    background-color: var(--primary-color);
    color: white;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Filter Sub-bar */
.filter-subbar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    background-color: var(--bg-subtle);
    padding: 10px 16px;
    border-radius: var(--radius-md);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    color: var(--text-secondary);
}

.filter-group select {
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: white;
    font-family: var(--font-family);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
}

.filter-group select:focus {
    outline: none;
    border-color: var(--border-focus);
}

/* Table Header Description */
.table-view-header {
    margin-top: 4px;
}

.table-view-header h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Custom Data Table */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.custom-table th {
    background-color: #F8FAFC;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.custom-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    color: var(--text-primary);
}

.custom-table tbody tr {
    transition: var(--transition);
}

.custom-table tbody tr:hover {
    background-color: #F1F5F9;
}

.custom-table tbody tr:last-child td {
    border-bottom: none;
}

/* Badges & Chips */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12.5px;
    font-weight: 600;
    white-space: nowrap;
}

.priority-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.priority-high { background-color: var(--danger-bg); color: var(--danger-color); }
.priority-medium { background-color: var(--warning-bg); color: #B45309; }
.priority-low { background-color: var(--success-bg); color: #047857; }

.category-chip {
    display: inline-block;
    background-color: var(--bg-subtle);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.date-text {
    font-size: 13px;
    color: var(--text-secondary);
}

.date-due.overdue {
    color: var(--danger-color);
    font-weight: 700;
}

.person-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.avatar-sm {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background-color: #CBD5E1;
    color: var(--text-primary);
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Row Action Buttons */
.action-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: white;
    border-color: var(--border-focus);
    color: var(--primary-color);
}

.btn-icon.btn-danger:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
    background-color: var(--danger-bg);
}

/* Empty State */
.empty-state {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.empty-state svg {
    color: #94A3B8;
}

.empty-state h4 {
    font-size: 16px;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #E2E8F0;
}

.btn-outline {
    background-color: white;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--border-focus);
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.btn-text {
    background: none;
    color: var(--text-muted);
    padding: 4px 8px;
    font-size: 13px;
}

.btn-text:hover {
    color: var(--primary-color);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12.5px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.modal-card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.25s ease;
}

.modal-sm { max-width: 420px; }
.modal-md { max-width: 560px; }
.modal-lg { max-width: 720px; }

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 17px;
    font-weight: 700;
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

.btn-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background-color: #F8FAFC;
}

/* Forms */
.grid-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.hint-text {
    font-size: 11.5px;
    color: var(--text-muted);
}

.error-banner {
    background-color: var(--danger-bg);
    color: var(--danger-color);
    border: 1px solid #FCA5A5;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-top: 12px;
}

/* Custom Status Manager Modal */
.add-status-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: var(--bg-subtle);
    padding: 14px;
    border-radius: var(--radius-md);
}

.flex-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.status-manager-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

.status-manager-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-sm);
}

/* View Details Modal */
.view-details-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-badge-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.detail-text-box {
    background-color: var(--bg-subtle);
    padding: 12px;
    border-radius: var(--radius-md);
    white-space: pre-wrap;
    min-height: 60px;
    font-size: 14px;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.detail-item label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    display: block;
}

.detail-val {
    font-size: 14px;
    font-weight: 600;
}

/* Footer */
.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}

.footer-right {
    display: flex;
    gap: 10px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background-color: var(--text-primary);
    color: white;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 13.5px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideLeft 0.3s ease;
}

.toast.success { background-color: #065F46; border-left: 4px solid var(--success-color); }
.toast.error { background-color: #991B1B; border-left: 4px solid var(--danger-color); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes slideLeft { from { transform: translateX(50px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Responsive Media Queries */
@media (max-width: 768px) {
    .nav-container { flex-direction: column; align-items: stretch; }
    .nav-actions { justify-content: space-between; }
    .search-box { width: 100%; }
    .grid-form { grid-template-columns: 1fr; }
    .col-span-2 { grid-column: span 1; }
    .toolbar { flex-direction: column; align-items: stretch; }
    .tabs-nav { overflow-x: auto; padding-bottom: 4px; }
}