:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Login Page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    font-size: 24px;
    margin-bottom: 8px;
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

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

.btn-block {
    width: 100%;
}

.error-msg {
    color: var(--danger);
    font-size: 14px;
    margin-top: 12px;
}

/* App Layout */
.app-container {
    display: none;
    min-height: 100vh;
}

.app-container.active {
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

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

.sidebar-header h1 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 4px;
}

.nav-item:hover, .nav-item.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item svg {
    width: 20px;
    height: 20px;
}

.nav-section {
    margin-top: 24px;
    margin-bottom: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 0 16px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    background: var(--bg-tertiary);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    color: white;
}

.user-details {
    flex: 1;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
}

.user-role {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 16px;
    width: 300px;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
}

.search-box input:focus {
    outline: none;
}

.search-box svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

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

/* Page Content */
.page-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header-left {
    display: flex;
    flex-direction: column;
}

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

.page-title {
    font-size: 24px;
    font-weight: 700;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.dashboard-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.dashboard-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-card-title {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.dashboard-card-body {
    padding: 12px;
    max-height: 400px;
    overflow-y: auto;
}

.task-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.task-item:hover {
    background: var(--bg-tertiary);
}

.task-info {
    flex: 1;
}

.task-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.task-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

.task-date {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

/* Board View */
.board-container {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 24px;
}

.board-column {
    min-width: 220px;
    max-width: 220px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 200px);
}

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

.column-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
}

.column-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.column-count {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-secondary);
}

.column-body {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
}

.see-all-link {
    display: block;
    text-align: center;
    padding: 10px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-top: 1px solid var(--border-color);
}

.see-all-link:hover {
    background: var(--bg-tertiary);
}

.case-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.case-card:hover {
    border-color: var(--accent);
}

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

.case-card-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
}

.case-card-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.case-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

.tag {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.case-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.assignees {
    display: flex;
}

.assignee-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    color: white;
    margin-left: -6px;
    border: 2px solid var(--bg-tertiary);
}

.assignee-avatar:first-child {
    margin-left: 0;
}

.comment-count {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-muted);
}

.comment-count svg {
    width: 14px;
    height: 14px;
}

/* Table View */
.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.table-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.filter-select {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    background: var(--bg-tertiary);
    cursor: pointer;
}

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

td {
    font-size: 14px;
}

tr:hover td {
    background: var(--bg-tertiary);
}

.table-wrapper {
    overflow-x: auto;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-large {
    max-width: 1000px;
}

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

.modal-title {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

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

.modal-body {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

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

/* Case Detail */
.case-detail-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 24px;
}

.case-main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.case-sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-section {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 16px;
}

.detail-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.detail-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

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

.detail-value {
    font-size: 13px;
    font-weight: 500;
}

/* Comments */
.comments-section {
    margin-top: 24px;
}

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

.comments-title {
    font-size: 16px;
    font-weight: 600;
}

.comment-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
    max-height: 300px;
    overflow-y: auto;
}

.comment-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.comment-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.comment-author {
    font-weight: 600;
    font-size: 13px;
}

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

.comment-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.comment-input-wrapper {
    display: flex;
    gap: 12px;
}

.comment-input-wrapper textarea {
    flex: 1;
    min-height: 80px;
    resize: vertical;
}

/* AI Summary */
.ai-summary-section {
    margin-top: 24px;
    padding: 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(147, 51, 234, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 8px;
}

.ai-summary-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.ai-summary-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
}

.ai-summary-content {
    font-size: 14px;
    line-height: 1.6;
}

.ai-summary-content h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 16px 0 8px 0;
}

.ai-summary-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 14px 0 6px 0;
}

.ai-summary-content h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 12px 0 4px 0;
}

.ai-summary-content strong {
    font-weight: 600;
}

.ai-summary-content ul {
    margin: 8px 0;
    padding-left: 20px;
}

.ai-summary-content li {
    margin: 4px 0;
}

.ai-summary-content p {
    margin: 8px 0;
}

.ai-chat-input {
    margin-top: 12px;
    display: flex;
    gap: 8px;
}

.ai-chat-input input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

/* Documents */
.documents-section {
    margin-top: 24px;
}

.document-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.document-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.document-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.document-info {
    flex: 1;
}

.document-name {
    font-weight: 500;
    font-size: 14px;
}

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

.document-actions {
    display: flex;
    gap: 8px;
}

.document-actions button {
    padding: 6px 12px;
    font-size: 12px;
}

/* Settings Page */
.settings-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.settings-tab {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

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

.settings-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.settings-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.settings-section {
    display: none;
}

.settings-section.active {
    display: block;
}

.settings-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.settings-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-item-color {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.settings-item-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

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

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

/* View Tabs */
.view-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.view-tab {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.view-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.view-tab svg {
    width: 18px;
    height: 18px;
}

/* Archive Toggle */
.archive-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.archive-toggle input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Responsive */
@media (max-width: 1024px) {
    .case-detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .search-box {
        width: 100%;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .board-column {
        min-width: 280px;
    }
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}