.left-nav {
    width: 280px;
    height: calc(100vh - 180px);
    background-color: var(--sidebar-bg, #f5f5f5);
    border-right: 1px solid var(--border-color, #ddd);
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow-y: auto;
    transition: width 0.3s ease;
}

.left-nav.collapsed {
    width: 60px;
}

.left-nav.collapsed .left-nav-header h3,
.left-nav.collapsed .project-name,
.left-nav.collapsed .new-project-btn .btn-text {
    display: none;
}

.user-section {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color, #ddd);
    background-color: var(--user-section-bg, #f9f9f9);
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #333);
    word-break: break-word;
}

.left-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color, #ddd);
    background-color: var(--header-bg, #fff);
}

.left-nav-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary, #333);
}

.collapse-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary, #666);
    font-size: 16px;
    transition: transform 0.3s ease;
}

.collapse-btn:hover {
    color: var(--text-primary, #333);
}

.arrow-icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

.new-project-section {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color, #ddd);
}

.new-project-btn {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--primary-color, #2c5f5d);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.new-project-btn:hover {
    background-color: var(--primary-hover, #4a7c7a);
}

.plus-icon {
    font-size: 18px;
}

.project-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.project-input {
    padding: 10px 12px;
    border: 1px solid var(--border-color, #ddd);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}

.project-input:focus {
    outline: none;
    border-color: var(--primary-color, #007bff);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.helper-text {
    font-size: 12px;
    color: var(--error-color, #dc3545);
}

.form-buttons {
    display: flex;
    gap: 8px;
}

.btn-save, .btn-cancel {
    flex: 1;
    padding: 10px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.btn-save {
    background-color: var(--primary-color, #2c5f5d);
    color: white;
    opacity: 1;
    transition: all 0.2s ease;
}

.btn-save:hover:not(:disabled) {
    background-color: var(--primary-hover, #4a7c7a);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(44, 95, 93, 0.3);
}

.btn-save:disabled {
    background-color: var(--disabled-bg, #999);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-cancel {
    background-color: var(--secondary-bg, #e9ecef);
    color: var(--text-primary, #333);
}

.btn-cancel:hover {
    background-color: var(--secondary-hover, #dee2e6);
}

.projects-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.project-item {
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 44px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: background-color 0.2s ease;
}

.project-item:hover {
    background-color: var(--hover-bg, #e9ecef);
}

.project-item.selected {
    background-color: var(--selected-bg, #e8f1f0);
    border-left-color: var(--primary-color, #2c5f5d);
}

.project-content {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 14px;
    font-weight: 900;
    text-shadow: 0 0 0.5px currentColor;
}

.checkmark {
    color: var(--success-color, #28a745);
    font-weight: 1100;
}

.x-mark {
    color: var(--error-color, #dc3545);
    font-weight: 1100;
}

.project-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary, #333);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-name-technical {
    font-size: 13px;
    font-weight: 400;
    color: #888;
    font-style: italic;
}

.project-menu {
    position: relative;
}

.menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary, #666);
    font-size: 16px;
    transition: color 0.2s ease;
}

.menu-btn:hover {
    color: var(--text-primary, #333);
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    background-color: white;
    border: 1px solid var(--border-color, #ddd);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    min-width: 120px;
}

.dropdown-menu button {
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary, #333);
    transition: background-color 0.2s ease;
}

.dropdown-menu button:first-child {
    border-radius: 6px 6px 0 0;
}

.dropdown-menu button:last-child {
    border-radius: 0 0 6px 6px;
}

.dropdown-menu button:hover {
    background-color: var(--hover-bg, #e9ecef);
}

.dropdown-menu button:last-child:hover {
    background-color: var(--error-light, #ffebee);
    color: var(--error-color, #dc3545);
}

.confirmation-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.confirmation-dialog {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 24px;
    max-width: 400px;
    width: 90%;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.confirmation-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary, #333);
    margin-bottom: 12px;
}

.confirmation-message {
    font-size: 14px;
    color: var(--text-secondary, #666);
    margin-bottom: 20px;
    line-height: 1.5;
}

.confirmation-buttons {
    display: flex;
    gap: 8px;
}

.btn-confirm {
    flex: 1;
    padding: 10px 16px;
    background-color: var(--primary-color, #2c5f5d);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-confirm:hover {
    background-color: var(--primary-hover, #4a7c7a);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(44, 95, 93, 0.3);
}

.btn-cancel-confirm {
    flex: 1;
    padding: 10px 16px;
    background-color: var(--secondary-bg, #e9ecef);
    color: var(--text-primary, #333);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.btn-cancel-confirm:hover {
    background-color: var(--secondary-hover, #dee2e6);
}