/* CSS Variables for theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --accent-color: #4a90d9;
    --accent-hover: #3a7bc8;
    --success-color: #4caf50;
    --danger-color: #e57373;
    --warning-color: #ff9800;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --transition: 0.2s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #252525;
        --bg-tertiary: #333333;
        --text-primary: #f0f0f0;
        --text-secondary: #b0b0b0;
        --text-muted: #707070;
        --border-color: #404040;
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* Login Screen */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-screen[hidden] {
    display: none;
}

.login-box {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 360px;
}

.login-box h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.login-box .form-group {
    margin-bottom: 1rem;
}

.login-box .btn-full {
    width: 100%;
    margin-top: 0.5rem;
}

.error-message {
    background: #ffebee;
    color: #c62828;
    padding: 0.75rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.error-message[hidden] {
    display: none;
}

@media (prefers-color-scheme: dark) {
    .error-message {
        background: #4a1c1c;
        color: #ff8a80;
    }
}

/* App Layout */
.app {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    max-width: 1600px;
    margin: 0 auto;
    padding: 1rem;
    min-height: 100vh;
}

.app[hidden] {
    display: none;
}

@media (max-width: 768px) {
    .app {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Panel Styles */
.panel {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 2rem);
    overflow: hidden;
}

@media (max-width: 768px) {
    .panel {
        border-radius: 0;
        max-height: none;
        min-height: 50vh;
    }
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.panel-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.panel-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.footer-left {
    display: flex;
    gap: 0.5rem;
}

.footer-buttons {
    display: flex;
    gap: 0.5rem;
}

/* View Container */
.view-container {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.view-container[hidden] {
    display: none;
}

/* Date Navigation */
.date-display {
    text-align: center;
    flex: 1;
}

.date-display h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.date-display span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.btn-nav {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

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

/* Quick Add */
.quick-add {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.quick-add input {
    flex: 1;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition);
}

.quick-add input:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

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

.btn-small {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition);
}

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

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

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

.btn-primary {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    background: var(--accent-color);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition);
}

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

.btn-primary:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

.btn-secondary {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
}

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

.btn-toggle {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-toggle:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
}

.btn-toggle:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
    border-left: none;
}

.btn-toggle.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.period-toggle {
    display: flex;
}

/* Filter */
.filter-container select {
    padding: 0.375rem 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

/* Task List */
.task-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
    padding: 0.5rem 0;
    min-height: 100px;
}

.task-list:empty::after {
    content: attr(data-empty);
    display: block;
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.875rem;
}

#repositoryList:empty::after {
    content: "No unassigned tasks. Add one above!";
}

/* Drop zone highlighting */
.task-list.drag-over-zone {
    background: var(--bg-secondary);
    outline: 2px dashed var(--accent-color);
    outline-offset: -4px;
}

/* Task Item */
.task-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--transition);
    min-height: 48px;
}

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

.task-item:last-child {
    border-bottom: none;
}

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

.task-item.dragging {
    opacity: 0.5;
    background: var(--bg-tertiary);
}

.task-item.drag-over {
    border-top: 2px solid var(--accent-color);
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-size: 0.9375rem;
    color: var(--text-primary);
    word-break: break-word;
}

.task-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.125rem;
    flex-wrap: wrap;
}

.task-meta .project {
    color: var(--accent-color);
}

.task-meta .charge-code {
    color: var(--text-muted);
}

.task-meta .hours {
    color: var(--success-color);
    font-weight: 500;
}

.task-meta .due-date.overdue {
    color: var(--danger-color);
}

.task-meta .assigned-date {
    color: var(--success-color);
}

/* Task Actions */
.task-actions {
    display: flex;
    gap: 0.125rem;
    opacity: 0;
    transition: opacity var(--transition);
}

.task-item:hover .task-actions {
    opacity: 1;
}

.task-action {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius);
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

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

.task-action.complete:hover {
    color: var(--success-color);
}

.task-action.remove:hover {
    color: var(--danger-color);
}

.task-action.edit:hover {
    color: var(--accent-color);
}

/* Inline Project Select */
.task-project-select {
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.7rem;
    cursor: pointer;
    max-width: 100px;
}

/* Drag Handle */
.drag-handle {
    cursor: grab;
    color: var(--text-muted);
    padding: 0.25rem;
    font-size: 0.875rem;
    user-select: none;
}

.drag-handle:active {
    cursor: grabbing;
}

/* Weekly View */
.weekly-grid {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow-y: auto;
}

.week-day {
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    min-height: 80px;
}

.week-day:last-child {
    border-bottom: none;
}

.week-day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
}

.week-day-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.week-day-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.week-day.is-today .week-day-header {
    background: var(--accent-color);
    color: white;
}

.week-day.is-today .week-day-date {
    color: rgba(255, 255, 255, 0.8);
}

.week-day-tasks {
    flex: 1;
    padding: 0.25rem 0;
    min-height: 50px;
}

.week-day-tasks .task-item {
    padding: 0.375rem 0.75rem;
    min-height: 36px;
}

.week-day-tasks .task-title {
    font-size: 0.8125rem;
}

.week-day-tasks .task-meta {
    font-size: 0.6875rem;
}

.week-day-tasks:empty::after {
    padding: 0.75rem;
    font-size: 0.75rem;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 100;
}

.modal[hidden] {
    display: none;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 480px;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}

.modal-content.modal-wide {
    max-width: 600px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

/* Form Styles */
#taskForm,
#editProjectForm,
.pdf-export-container {
    padding: 1.25rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* Projects Management */
.projects-container,
.trash-container {
    padding: 1.25rem;
}

.project-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.project-form input {
    flex: 1;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.project-form input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.projects-list {
    list-style: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    max-height: 300px;
    overflow-y: auto;
}

.projects-list:empty::after {
    content: "No items";
    display: block;
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-style: italic;
}

.project-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.project-item:last-child {
    border-bottom: none;
}

.project-info {
    flex: 1;
}

.project-name {
    font-weight: 500;
    color: var(--text-primary);
}

.project-charge-code {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.project-details {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.project-actions {
    display: flex;
    gap: 0.25rem;
}

/* Trash */
.trash-actions {
    margin-bottom: 1rem;
    text-align: right;
}

.trash-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.trash-item:last-child {
    border-bottom: none;
}

.trash-item-info {
    flex: 1;
}

.trash-item-title {
    color: var(--text-primary);
}

.trash-item-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Loading indicator */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.task-item {
    animation: slideIn 0.2s ease;
}

/* Scrollbar styling */
.task-list::-webkit-scrollbar,
.projects-list::-webkit-scrollbar,
.weekly-grid::-webkit-scrollbar {
    width: 8px;
}

.task-list::-webkit-scrollbar-track,
.projects-list::-webkit-scrollbar-track,
.weekly-grid::-webkit-scrollbar-track {
    background: transparent;
}

.task-list::-webkit-scrollbar-thumb,
.projects-list::-webkit-scrollbar-thumb,
.weekly-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.task-list::-webkit-scrollbar-thumb:hover,
.projects-list::-webkit-scrollbar-thumb:hover,
.weekly-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Print styles for PDF */
@media print {
    body {
        background: white;
        color: black;
    }

    .app {
        display: block;
    }

    .panel {
        box-shadow: none;
        max-height: none;
    }
}