/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    height: 32px;
    white-space: nowrap;
}

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

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

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

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

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

.btn--danger:hover {
    background: #E0332B;
}

.btn--ghost {
    background: transparent;
    color: var(--color-accent);
}

.btn--ghost:hover {
    background: var(--color-accent-light);
}

.btn--sm {
    height: 26px;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-sm);
}

.btn--block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.15s ease;
}

.modal {
    background: var(--color-bg-content);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-popover);
    max-width: 480px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: slideUp 0.2s ease;
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.modal__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.modal__close {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
}

.modal__close:hover {
    background: var(--color-bg-hover);
}

.modal__body {
    padding: var(--space-xl);
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--color-border-light);
}

/* Toast */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    font-size: var(--font-size-sm);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.2s ease;
    max-width: 360px;
}

.toast--success {
    background: var(--color-success);
}

.toast--error {
    background: var(--color-danger);
}

.toast--warning {
    background: var(--color-warning);
}

.toast__close {
    color: rgba(255,255,255,0.7);
    margin-left: auto;
    cursor: pointer;
    flex-shrink: 0;
}

/* Color Picker */
.color-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm);
}

.color-picker__swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.color-picker__swatch:hover {
    transform: scale(1.2);
}

.color-picker__swatch.selected {
    border-color: var(--color-text-primary);
}

/* Icon Picker */
.icon-picker {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-xs);
    padding: var(--space-sm);
}

.icon-picker__item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: 18px;
}

.icon-picker__item:hover {
    background: var(--color-bg-hover);
}

.icon-picker__item.selected {
    background: var(--color-accent);
    color: white;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg-hover);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar__fill {
    height: 100%;
    border-radius: 4px;
    transition: width var(--transition-slow);
}

.progress-bar__fill--green { background: var(--color-success); }
.progress-bar__fill--orange { background: var(--color-warning); }
.progress-bar__fill--red { background: var(--color-danger); }

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-lg);
}

.tabs__tab {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

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

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown__menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-popover);
    z-index: 100;
    padding: var(--space-xs) 0;
    display: none;
}

.dropdown__menu.open {
    display: block;
}

.dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown__item:hover {
    background: var(--color-bg-hover);
}

.dropdown__divider {
    height: 1px;
    background: var(--color-border-light);
    margin: var(--space-xs) 0;
}

/* Date picker */
.datepicker {
    background: var(--color-bg-content);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-popover);
    padding: var(--space-md);
    width: 280px;
    position: absolute;
    z-index: 200;
}

.datepicker__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.datepicker__nav {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
}

.datepicker__nav:hover {
    background: var(--color-bg-hover);
}

.datepicker__month {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
}

.datepicker__grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--space-xxs);
    text-align: center;
}

.datepicker__day-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-semibold);
    padding: var(--space-xs);
}

.datepicker__day {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.datepicker__day:hover {
    background: var(--color-bg-hover);
}

.datepicker__day.today {
    border: 1px solid var(--color-accent);
}

.datepicker__day.selected {
    background: var(--color-accent);
    color: white;
}

.datepicker__day.other-month {
    color: var(--color-text-tertiary);
}

/* Tree view */
.tree-view {
    padding: var(--space-sm);
}

.tree-node {
    user-select: none;
}

.tree-node__content {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
    height: 28px;
}

.tree-node__content:hover {
    background: var(--color-bg-hover);
}

.tree-node__content.selected {
    background: var(--color-bg-selected);
}

.tree-node__toggle {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.tree-node__toggle.expanded {
    transform: rotate(90deg);
}

.tree-node__icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    font-size: 10px;
    flex-shrink: 0;
}

.tree-node__label {
    font-size: var(--font-size-base);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tree-node__badge {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    padding: 1px 6px;
    border-radius: 10px;
    background: var(--color-bg-hover);
}

.tree-node__children {
    padding-left: 20px;
}

/* Loading spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xxxl);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* Confirm dialog */
.confirm {
    text-align: center;
    padding: var(--space-xl);
}

.confirm__message {
    font-size: var(--font-size-md);
    margin-bottom: var(--space-xl);
    line-height: 1.5;
}

.confirm__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}