:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --secondary: #10B981;
    --bg-color: #F8FAFC;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-solid: #FFFFFF;
    --text-main: #0F172A;
    --text-muted: #64748B;
    --border: rgba(226, 232, 240, 0.6);
    --border-solid: #E2E8F0;
    
    /* Kanban Columns Colors */
    --col-1: rgba(239, 246, 255, 0.5);
    --col-2: rgba(254, 242, 242, 0.5);
    --col-3: rgba(255, 251, 235, 0.5);
    --col-4: rgba(240, 253, 244, 0.5);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-md: 12px;
    --radius-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Noto Sans Thai', sans-serif;
}

body {
    background-color: #f0f4ff;
    background-image: 
        radial-gradient(at 40% 20%, hsla(250,100%,94%,1) 0px, transparent 50%),
        radial-gradient(at 80% 0%, hsla(189,100%,96%,1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, hsla(333,100%,96%,1) 0px, transparent 50%),
        radial-gradient(at 80% 50%, hsla(240,100%,96%,1) 0px, transparent 50%);
    color: var(--text-main);
    overflow: hidden;
    min-height: 100vh;
}

/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--surface);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 10;
    box-shadow: var(--shadow-md);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
}

.sidebar-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 20px 12px;
}

.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
    margin: 16px 0 8px 12px;
    letter-spacing: 0.05em;
}

.nav-btn {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 4px;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.8);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.nav-btn.active {
    background-image: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Topbar */
.topbar {
    height: 70px;
    background-color: var(--surface);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    z-index: 5;
    box-shadow: var(--shadow-sm);
}

.topbar h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.topbar-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
}

.search-box input {
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--border);
    background-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    border-radius: 24px;
    outline: none;
    font-size: 0.95rem;
    width: 280px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.search-box input:focus {
    background-color: var(--surface-solid);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
    width: 320px;
}



/* Buttons */
.btn {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background-image: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
    filter: brightness(1.1);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    color: var(--text-main);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--surface-solid);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Views */
.view-container {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 32px;
}

.view-container.active {
    display: block;
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: rgba(255, 255, 255, 0.8);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #EEF2FF;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.stat-icon.warning {
    background: #FFFBEB;
    color: #F59E0B;
}

.stat-icon.success {
    background: #F0FDF4;
    color: #10B981;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-info p {
    font-size: 1.8rem;
    font-weight: 600;
    margin-top: 4px;
}

.charts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.chart-card {
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.chart-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-main);
}

/* Kanban Board */
.kanban-board {
    display: flex;
    gap: 24px;
    height: 100%;
    overflow-x: auto;
    padding-bottom: 24px;
    align-items: flex-start; /* So columns don't stretch */
}

.kanban-column {
    background: var(--surface);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-lg);
    min-width: 320px;
    max-width: 320px;
    display: flex;
    flex-direction: column;
    max-height: 100%;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary);
}

.kanban-column[data-col="1"] { border-top-color: #3B82F6; background: linear-gradient(to bottom, rgba(255,255,255,0.8), var(--col-1)); }
.kanban-column[data-col="2"] { border-top-color: #F59E0B; background: linear-gradient(to bottom, rgba(255,255,255,0.8), var(--col-3)); }
.kanban-column[data-col="3"] { border-top-color: #EF4444; background: linear-gradient(to bottom, rgba(255,255,255,0.8), var(--col-2)); }
.kanban-column[data-col="4"] { border-top-color: #10B981; background: linear-gradient(to bottom, rgba(255,255,255,0.8), var(--col-4)); }

.column-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.column-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.case-count {
    background: #E5E7EB;
    color: var(--text-main);
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
}

.column-body {
    padding: 16px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 100px;
}

.case-card {
    background-color: var(--surface);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    cursor: pointer;
    border: 1px solid #E5E7EB;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.case-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
    border-color: #CBD5E1;
}

.case-card:active {
    cursor: grabbing;
}

.case-card.dragging {
    opacity: 0.5;
}

.card-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 8px;
    line-height: 1.4;
}

.card-info {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
}

.card-info-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 12px;
    background: #EEF2FF;
    color: var(--primary);
    font-weight: 500;
    border: 1px solid rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
}

/* Status Tag Colors */
.tag-col1 { background: #F0F9FF; color: #0369A1; border-color: #BAE6FD; }
.tag-col2 { background: #FAF5FF; color: #6B21A8; border-color: #E9D5FF; }
.tag-col3 { background: #FEF2F2; color: #DC2626; border-color: #FECACA; }
.tag-col4 { background: #F0FDF4; color: #15803D; border-color: #BBF7D0; }

/* Status Hover Effects on Card Hover */
.case-card:hover .tag-col1 { background: #E0F2FE; box-shadow: 0 0 8px rgba(3, 105, 161, 0.15); }
.case-card:hover .tag-col2 { background: #F3E8FF; box-shadow: 0 0 8px rgba(107, 33, 168, 0.15); }
.case-card:hover .tag-col3 { background: #FEE2E2; box-shadow: 0 0 8px rgba(220, 38, 38, 0.15); }
.case-card:hover .tag-col4 { background: #DCFCE7; box-shadow: 0 0 8px rgba(21, 128, 61, 0.15); }

.btn-file {
    background: #F3F4F6;
    border: none;
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-muted);
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}
.btn-file:hover {
    background: #E5E7EB;
    color: var(--text-main);
    transform: translateY(-1px);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    width: 650px;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-muted);
    cursor: pointer;
}

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

#add-doc-form {
    padding: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-main);
}

.form-group input, .form-group select, .form-group .file-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    background-color: white;
}

.form-group .file-input {
    padding: 8px;
    cursor: pointer;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Todo List Styles */
.todo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 16px;
}

.todo-card {
    background: var(--surface-solid);
    border: 1px solid var(--border-solid);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    min-height: 250px;
    transition: all 0.3s;
}

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

.todo-card-header {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 6px;
}

.todo-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.todo-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px 8px;
    background: #F8FAFC;
    border-radius: 6px;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.todo-item:hover {
    border-color: #E2E8F0;
    background: #FFFFFF;
}

.todo-item.completed {
    opacity: 0.6;
}

.todo-item.completed span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-checkbox {
    margin-top: 4px;
    cursor: pointer;
    width: 16px;
    height: 16px;
    accent-color: var(--secondary);
}

.todo-text {
    flex: 1;
    font-size: 0.85rem;
    line-height: 1.4;
    word-break: break-word;
}

.todo-delete {
    color: #EF4444;
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.todo-item:hover .todo-delete {
    opacity: 1;
}

.todo-input-group {
    display: flex;
    gap: 8px;
}

.todo-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}

.todo-input:focus {
    border-color: var(--primary);
}

.todo-add-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0 12px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.todo-add-btn:hover {
    opacity: 0.9;
}

.todo-attach-btn {
    color: #64748B;
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.6;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.todo-attach-btn:hover {
    opacity: 1;
    color: var(--primary);
}

.todo-file-open {
    color: var(--primary);
    background: #EFF6FF;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.todo-file-open:hover {
    background: #DBEAFE;
    color: #1D4ED8;
}

/* View Case Modal */
.view-case-body {
    padding: 20px 0 0 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 70vh;
    overflow-y: auto;
}

.view-section {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    padding: 16px;
}

.view-section h3 {
    margin: 0 0 12px 0;
    font-size: 1rem;
    color: #334155;
    display: flex;
    align-items: center;
    gap: 8px;
}

.view-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 16px;
}

.view-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.view-label {
    font-size: 0.75rem;
    color: #64748B;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.view-value {
    font-size: 0.95rem;
    color: #1E293B;
}

/* Calendar Styles */
.calendar-nav { display: flex; align-items: center; gap: 10px; }
.calendar-grid { 
    display: grid; 
    grid-template-columns: repeat(7, 1fr); 
    gap: 8px; 
    margin-top: 10px; 
}
.cal-day-header { 
    text-align: center; 
    font-weight: 600; 
    color: var(--text-muted); 
    font-size: 0.9rem; 
    padding-bottom: 8px; 
}
.cal-day { 
    min-height: 80px; 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 6px; 
    background: #fff; 
    cursor: pointer; 
    transition: all 0.2s; 
    display: flex; 
    flex-direction: column; 
    gap: 4px; 
}
.cal-day:hover { 
    border-color: var(--primary); 
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1); 
}
.cal-day.empty { 
    background: transparent; 
    border: none; 
    cursor: default; 
    box-shadow: none; 
}
.cal-day.today { 
    background: #EEF2FF; 
    border-color: #C7D2FE; 
}
.cal-day-number { 
    font-weight: 500; 
    font-size: 0.9rem; 
    text-align: right; 
    color: var(--text-main); 
    margin-bottom: 4px; 
}
.cal-day.today .cal-day-number { 
    color: var(--primary); 
    font-weight: 700; 
}
.cal-event { 
    font-size: 0.75rem; 
    padding: 3px 6px; 
    border-radius: 4px; 
    color: #fff; 
    white-space: nowrap; 
    overflow: hidden; 
    text-overflow: ellipsis; 
    margin-bottom: 2px;
}