.pi-button {
    align-items: center;
    appearance: none;
    border: 1px solid transparent;
    border-radius: var(--pi-radius-md);
    cursor: pointer;
    display: inline-flex;
    font-weight: 700;
    gap: var(--pi-space-2);
    justify-content: center;
    line-height: 1;
    min-height: 40px;
    padding: 0 var(--pi-space-4);
    text-decoration: none;
    transition:
        background-color var(--pi-transition-fast),
        border-color var(--pi-transition-fast),
        color var(--pi-transition-fast),
        transform var(--pi-transition-fast);
    user-select: none;
    white-space: nowrap;
}

.pi-button:hover {
    text-decoration: none;
}

.pi-button:active {
    transform: translateY(1px);
}

.pi-button[disabled],
.pi-button:disabled,
.pi-button.is-disabled {
    cursor: not-allowed;
    opacity: var(--pi-disabled-opacity);
    pointer-events: none;
}

.pi-button.is-loading {
    color: transparent;
    pointer-events: none;
    position: relative;
}

.pi-button.is-loading::after {
    animation: pi-spin .8s linear infinite;
    border: 2px solid var(--pi-button-loader, var(--pi-primary));
    border-right-color: transparent;
    border-radius: 999px;
    content: "";
    height: 16px;
    left: calc(50% - 8px);
    position: absolute;
    top: calc(50% - 8px);
    width: 16px;
}

.pi-button.pi-button--primary {
    background: var(--pi-primary);
    color: var(--pi-primary-contrast);
    --pi-button-loader: var(--pi-primary-contrast);
}

.pi-button.pi-button--primary:hover {
    background: var(--pi-primary-hover);
    color: var(--pi-primary-contrast);
}

.pi-button.pi-button--secondary {
    background: var(--pi-surface);
    border-color: var(--pi-border);
    color: var(--pi-text);
}

.pi-button.pi-button--secondary:hover {
    background: var(--pi-surface-interactive);
    border-color: var(--pi-border-strong);
    color: var(--pi-text);
}

.pi-button.pi-button--ghost {
    background: transparent;
    color: var(--pi-text-secondary);
}

.pi-button.pi-button--ghost:hover {
    background: var(--pi-surface-interactive);
    color: var(--pi-text);
}

.pi-button.pi-button--outline {
    background: transparent;
    border-color: var(--pi-border);
    color: var(--pi-text);
}

.pi-button.pi-button--outline:hover {
    background: var(--pi-surface-interactive);
    border-color: var(--pi-primary);
    color: var(--pi-primary);
}

.pi-button.pi-button--danger {
    background: var(--pi-danger);
    color: var(--pi-primary-contrast);
    --pi-button-loader: var(--pi-primary-contrast);
}

.pi-button.pi-button--danger:hover {
    filter: brightness(.95);
    color: var(--pi-primary-contrast);
}

.pi-button--sm {
    font-size: var(--pi-font-sm);
    min-height: var(--pi-control-height-sm);
    padding: 0 var(--pi-space-3);
}

.pi-button--lg {
    font-size: var(--pi-font-lg);
    min-height: var(--pi-control-height-lg);
    padding: 0 var(--pi-space-5);
}

.pi-button--icon {
    min-height: var(--pi-control-height-md);
    padding: 0;
    width: var(--pi-control-height-md);
}

.pi-icon-button {
    align-items: center;
    appearance: none;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--pi-radius-md);
    color: var(--pi-text-secondary);
    cursor: pointer;
    display: inline-flex;
    flex: 0 0 auto;
    height: 40px;
    justify-content: center;
    padding: 0;
    position: relative;
    transition:
        background-color var(--pi-transition-fast),
        border-color var(--pi-transition-fast),
        color var(--pi-transition-fast);
    width: 40px;
}

.pi-icon-button:hover,
.pi-icon-button.is-active {
    background: var(--pi-surface-interactive);
    border-color: var(--pi-border-soft);
    color: var(--pi-primary);
}

.pi-icon-button--sm {
    height: 32px;
    width: 32px;
}

.pi-icon-button__badge {
    align-items: center;
    background: var(--pi-danger);
    border: 2px solid var(--pi-surface);
    border-radius: var(--pi-radius-pill);
    color: var(--pi-primary-contrast);
    display: inline-flex;
    font-size: 10px;
    font-weight: 800;
    height: 18px;
    justify-content: center;
    min-width: 18px;
    padding: 0 4px;
    position: absolute;
    right: -4px;
    top: -4px;
}

.pi-field {
    display: grid;
    gap: var(--pi-space-2);
}

.pi-label {
    color: var(--pi-text-secondary);
    font-size: var(--pi-font-sm);
    font-weight: 700;
}

.pi-input,
.pi-textarea,
.pi-select {
    appearance: none;
    background: var(--pi-surface);
    border: 1px solid var(--pi-border);
    border-radius: var(--pi-radius-md);
    color: var(--pi-text);
    min-height: 42px;
    padding: 0 var(--pi-space-3);
    transition:
        background-color var(--pi-transition-fast),
        border-color var(--pi-transition-fast),
        box-shadow var(--pi-transition-fast);
    width: 100%;
}

.pi-textarea {
    line-height: var(--pi-line-normal);
    min-height: 112px;
    padding-bottom: var(--pi-space-3);
    padding-top: var(--pi-space-3);
    resize: vertical;
}

.pi-input::placeholder,
.pi-textarea::placeholder {
    color: var(--pi-text-muted);
}

.pi-input:focus,
.pi-textarea:focus,
.pi-select:focus {
    border-color: var(--pi-primary);
    box-shadow: var(--pi-focus-ring);
    outline: none;
}

.pi-input[disabled],
.pi-textarea[disabled],
.pi-select[disabled],
.pi-input:disabled,
.pi-textarea:disabled,
.pi-select:disabled,
.pi-input[readonly],
.pi-textarea[readonly] {
    background: var(--pi-surface-secondary);
    color: var(--pi-text-muted);
    cursor: not-allowed;
}

.pi-field.is-error .pi-input,
.pi-field.is-error .pi-textarea,
.pi-field.is-error .pi-select {
    border-color: var(--pi-danger);
}

.pi-field-message {
    color: var(--pi-text-muted);
    font-size: var(--pi-font-xs);
}

.pi-field.is-error .pi-field-message {
    color: var(--pi-danger);
}

.pi-check {
    align-items: flex-start;
    color: var(--pi-text-secondary);
    cursor: pointer;
    display: inline-flex;
    gap: var(--pi-space-2);
    line-height: var(--pi-line-normal);
}

.pi-check input {
    accent-color: var(--pi-primary);
    flex: 0 0 auto;
    height: 16px;
    margin-top: 3px;
    width: 16px;
}

.pi-check input:disabled,
.pi-check.is-disabled {
    cursor: not-allowed;
    opacity: var(--pi-disabled-opacity);
}

.pi-search {
    align-items: center;
    background: var(--pi-surface-secondary);
    border: 1px solid var(--pi-border-soft);
    border-radius: 999px;
    color: var(--pi-text-muted);
    display: flex;
    gap: var(--pi-space-2);
    min-height: 44px;
    padding: 0 var(--pi-space-4);
    transition:
        background-color var(--pi-transition-fast),
        border-color var(--pi-transition-fast),
        box-shadow var(--pi-transition-fast);
}

.pi-search:focus-within {
    background: var(--pi-surface);
    border-color: var(--pi-primary);
    box-shadow: var(--pi-focus-ring);
}

.pi-search__input {
    background: transparent;
    border: 0;
    color: var(--pi-text);
    flex: 1 1 auto;
    min-width: 0;
    outline: 0;
}

.pi-search__shortcut {
    border: 1px solid var(--pi-border);
    border-radius: var(--pi-radius-sm);
    color: var(--pi-text-muted);
    font-size: var(--pi-font-xs);
    padding: 1px var(--pi-space-2);
}

.pi-card {
    background: var(--pi-surface);
    border: 1px solid var(--pi-border-soft);
    border-radius: var(--pi-radius-lg);
    box-shadow: var(--pi-shadow-xs);
    color: var(--pi-text);
    padding: var(--pi-space-5);
}

.pi-card--subtle {
    background: var(--pi-surface-secondary);
    border-color: var(--pi-border-soft);
    box-shadow: none;
}

.pi-card--compact {
    padding: var(--pi-space-4);
}

.pi-card--elevated {
    background: var(--pi-surface-elevated);
    border-color: var(--pi-border);
    box-shadow: var(--pi-shadow-sm);
}

.pi-card--interactive {
    cursor: pointer;
    transition:
        border-color var(--pi-transition-fast),
        box-shadow var(--pi-transition-fast),
        transform var(--pi-transition-fast);
}

.pi-card--interactive:hover {
    border-color: var(--pi-border-strong);
    box-shadow: var(--pi-shadow-sm);
    transform: translateY(-1px);
}

.pi-card--dark-accent {
    background: linear-gradient(145deg, var(--pi-bg-secondary), var(--pi-surface-elevated));
    border-color: var(--pi-border);
}

.pi-card__header {
    align-items: flex-start;
    display: flex;
    gap: var(--pi-space-3);
    justify-content: space-between;
    margin-bottom: var(--pi-space-4);
}

.pi-card__title {
    font-size: var(--pi-font-card-title);
    font-weight: 750;
    line-height: var(--pi-line-tight);
    margin: 0;
}

.pi-card__meta {
    color: var(--pi-text-muted);
    font-size: var(--pi-font-sm);
}

.pi-badge {
    align-items: center;
    background: var(--pi-surface-secondary);
    border: 1px solid var(--pi-border-soft);
    border-radius: 999px;
    color: var(--pi-text-secondary);
    display: inline-flex;
    font-size: var(--pi-font-xs);
    font-weight: 750;
    gap: var(--pi-space-1);
    line-height: 1;
    min-height: 24px;
    padding: 0 var(--pi-space-2);
    white-space: nowrap;
}

.pi-badge--primary {
    background: var(--pi-primary-soft);
    border-color: transparent;
    color: var(--pi-primary);
}

.pi-badge--success {
    background: var(--pi-success-soft);
    border-color: transparent;
    color: var(--pi-success);
}

.pi-badge--danger {
    background: var(--pi-danger-soft);
    border-color: transparent;
    color: var(--pi-danger);
}

.pi-badge--warning {
    background: var(--pi-warning-soft);
    border-color: transparent;
    color: var(--pi-warning);
}

.pi-badge--info {
    background: var(--pi-info-soft);
    border-color: transparent;
    color: var(--pi-info);
}

.pi-avatar {
    align-items: center;
    background: var(--pi-primary-soft);
    border: 1px solid var(--pi-border-soft);
    border-radius: 999px;
    color: var(--pi-primary);
    display: inline-flex;
    flex: 0 0 auto;
    font-weight: 800;
    height: var(--pi-avatar-size, 40px);
    justify-content: center;
    overflow: hidden;
    position: relative;
    width: var(--pi-avatar-size, 40px);
}

.pi-avatar img {
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
    width: 100%;
    z-index: 1;
}

.pi-avatar--fallback > span {
    position: relative;
    z-index: 0;
}

.pi-avatar--xs {
    --pi-avatar-size: 24px;
    font-size: .65rem;
}

.pi-avatar--sm {
    --pi-avatar-size: 32px;
    font-size: var(--pi-font-xs);
}

.pi-avatar--md {
    --pi-avatar-size: 40px;
}

.pi-avatar--lg {
    --pi-avatar-size: 56px;
    font-size: var(--pi-font-lg);
}

.pi-avatar--xl {
    --pi-avatar-size: 80px;
    font-size: var(--pi-font-xl);
}

.pi-avatar__status {
    background: var(--pi-success);
    border: 2px solid var(--pi-surface);
    border-radius: 999px;
    bottom: 0;
    height: 12px;
    position: absolute;
    right: 0;
    width: 12px;
}

.pi-avatar-group {
    align-items: center;
    display: inline-flex;
}

.pi-avatar-group .pi-avatar {
    box-shadow: 0 0 0 2px var(--pi-surface);
    margin-left: -8px;
}

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

.pi-avatar-group__more {
    align-items: center;
    background: var(--pi-surface-secondary);
    border: 1px solid var(--pi-border);
    border-radius: 999px;
    color: var(--pi-text-secondary);
    display: inline-flex;
    font-size: var(--pi-font-xs);
    font-weight: 800;
    height: 32px;
    justify-content: center;
    margin-left: -8px;
    min-width: 32px;
    padding: 0 var(--pi-space-2);
}

.pi-tabs {
    border-bottom: 1px solid var(--pi-border-soft);
    display: flex;
    gap: var(--pi-space-4);
    overflow-x: auto;
    scrollbar-width: none;
}

.pi-tabs::-webkit-scrollbar {
    display: none;
}

.pi-tab {
    background: transparent;
    border: 0;
    color: var(--pi-text-secondary);
    cursor: pointer;
    flex: 0 0 auto;
    font-weight: 750;
    padding: var(--pi-space-3) 0;
    position: relative;
    white-space: nowrap;
}

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

.pi-tab.is-active,
.pi-tab[aria-selected="true"] {
    color: var(--pi-primary);
}

.pi-tab.is-active::after,
.pi-tab[aria-selected="true"]::after {
    background: var(--pi-primary);
    border-radius: 999px 999px 0 0;
    bottom: -1px;
    content: "";
    height: 2px;
    left: 0;
    position: absolute;
    right: 0;
}

.pi-dropdown {
    display: inline-block;
    position: relative;
}

.pi-dropdown__menu {
    background: var(--pi-surface-elevated);
    border: 1px solid var(--pi-border);
    border-radius: var(--pi-radius-lg);
    box-shadow: var(--pi-shadow-md);
    color: var(--pi-text);
    display: none;
    min-width: 220px;
    padding: var(--pi-space-2);
    position: absolute;
    right: 0;
    top: calc(100% + var(--pi-space-2));
    z-index: 1050;
}

.pi-dropdown.is-open .pi-dropdown__menu,
.pi-dropdown__menu.is-open {
    display: block;
}

.pi-dropdown__item {
    align-items: center;
    background: transparent;
    border: 0;
    border-radius: var(--pi-radius-md);
    color: var(--pi-text-secondary);
    cursor: pointer;
    display: flex;
    gap: var(--pi-space-2);
    min-height: 36px;
    padding: 0 var(--pi-space-3);
    text-align: left;
    text-decoration: none;
    width: 100%;
}

.pi-dropdown__item:hover,
.pi-dropdown__item.is-selected,
.pi-dropdown__item.is-active {
    background: var(--pi-surface-interactive);
    color: var(--pi-text);
    text-decoration: none;
}

.pi-dropdown__item[disabled],
.pi-dropdown__item:disabled,
.pi-dropdown__item[aria-disabled="true"] {
    color: var(--pi-text-muted);
    cursor: not-allowed;
    opacity: .6;
}

.pi-dropdown__separator {
    background: var(--pi-border-soft);
    height: 1px;
    margin: var(--pi-space-2) 0;
}

.pi-modal {
    align-items: center;
    background: var(--pi-overlay);
    display: none;
    inset: 0;
    justify-content: center;
    padding: var(--pi-space-4);
    position: fixed;
    z-index: 1060;
}

.pi-modal.is-open {
    display: flex;
}

.pi-modal__dialog {
    background: var(--pi-surface-elevated);
    border: 1px solid var(--pi-border);
    border-radius: var(--pi-radius-xl);
    box-shadow: var(--pi-shadow-md);
    color: var(--pi-text);
    max-height: min(720px, calc(100vh - 32px));
    max-width: 560px;
    overflow: auto;
    width: 100%;
}

.pi-modal__header,
.pi-modal__footer {
    align-items: center;
    display: flex;
    gap: var(--pi-space-3);
    justify-content: space-between;
    padding: var(--pi-space-5);
}

.pi-modal__header {
    border-bottom: 1px solid var(--pi-border-soft);
}

.pi-modal__footer {
    border-top: 1px solid var(--pi-border-soft);
    justify-content: flex-end;
}

.pi-modal__title {
    font-size: var(--pi-font-lg);
    font-weight: 800;
    margin: 0;
}

.pi-modal__body {
    padding: var(--pi-space-5);
}

.pi-skeleton {
    animation: pi-skeleton 1.4s ease-in-out infinite;
    background: linear-gradient(90deg, var(--pi-surface-secondary), var(--pi-surface-interactive), var(--pi-surface-secondary));
    background-size: 220% 100%;
    border-radius: var(--pi-radius-md);
    min-height: 16px;
}

.pi-skeleton--line {
    height: 16px;
}

.pi-skeleton--avatar {
    border-radius: 999px;
    height: 40px;
    width: 40px;
}

.pi-skeleton--card {
    height: 128px;
}

.pi-skeleton--publication {
    display: grid;
    gap: var(--pi-space-3);
    padding: var(--pi-space-5);
}

.pi-skeleton--row {
    height: 48px;
}

.pi-empty-state,
.pi-error-state {
    align-items: center;
    background: var(--pi-surface);
    border: 1px dashed var(--pi-border);
    border-radius: var(--pi-radius-lg);
    color: var(--pi-text-secondary);
    display: flex;
    flex-direction: column;
    gap: var(--pi-space-3);
    padding: var(--pi-space-8);
    text-align: center;
}

.pi-empty-state__icon,
.pi-error-state__icon {
    align-items: center;
    background: var(--pi-primary-soft);
    border-radius: 999px;
    color: var(--pi-primary);
    display: inline-flex;
    height: 44px;
    justify-content: center;
    width: 44px;
}

.pi-error-state__icon {
    background: var(--pi-danger-soft);
    color: var(--pi-danger);
}

.pi-empty-state__title,
.pi-error-state__title {
    color: var(--pi-text);
    font-size: var(--pi-font-lg);
    font-weight: 800;
    margin: 0;
}

.pi-empty-state__description,
.pi-error-state__description {
    margin: 0;
    max-width: 520px;
}

.pi-progress {
    background: var(--pi-surface-interactive);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
}

.pi-progress__bar {
    background: var(--pi-primary);
    border-radius: inherit;
    height: 100%;
    transition: width var(--pi-transition-normal);
    width: var(--pi-progress-value, 0%);
}

.pi-tooltip {
    background: var(--pi-chart-tooltip-bg);
    border: 1px solid var(--pi-border);
    border-radius: var(--pi-radius-md);
    box-shadow: var(--pi-shadow-sm);
    color: var(--pi-chart-tooltip-text);
    font-size: var(--pi-font-xs);
    font-weight: 700;
    line-height: var(--pi-line-normal);
    max-width: 240px;
    padding: var(--pi-space-2) var(--pi-space-3);
    z-index: 1070;
}

.pi-toast {
    align-items: flex-start;
    background: var(--pi-surface-elevated);
    border: 1px solid var(--pi-border);
    border-left: 4px solid var(--pi-info);
    border-radius: var(--pi-radius-lg);
    box-shadow: var(--pi-shadow-md);
    color: var(--pi-text);
    display: flex;
    gap: var(--pi-space-3);
    max-width: 420px;
    padding: var(--pi-space-4);
}

.pi-toast--success {
    border-left-color: var(--pi-success);
}

.pi-toast--danger {
    border-left-color: var(--pi-danger);
}

.pi-toast--warning {
    border-left-color: var(--pi-warning);
}

.pi-toast--info {
    border-left-color: var(--pi-info);
}

.pi-toast__title {
    color: var(--pi-text);
    font-size: var(--pi-font-sm);
    font-weight: 800;
    margin: 0;
}

.pi-toast__message {
    color: var(--pi-text-secondary);
    font-size: var(--pi-font-sm);
    margin: var(--pi-space-1) 0 0;
}

.pi-switch {
    align-items: center;
    cursor: pointer;
    display: inline-flex;
    gap: var(--pi-space-2);
}

.pi-switch__input {
    opacity: 0;
    position: absolute;
}

.pi-switch__track {
    background: var(--pi-border-strong);
    border-radius: 999px;
    height: 24px;
    position: relative;
    transition: background-color var(--pi-transition-fast);
    width: 44px;
}

.pi-switch__track::after {
    background: var(--pi-surface);
    border-radius: 999px;
    box-shadow: var(--pi-shadow-xs);
    content: "";
    height: 18px;
    left: 3px;
    position: absolute;
    top: 3px;
    transition: transform var(--pi-transition-fast);
    width: 18px;
}

.pi-switch__input:checked + .pi-switch__track {
    background: var(--pi-primary);
}

.pi-switch__input:checked + .pi-switch__track::after {
    transform: translateX(20px);
}

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

@keyframes pi-skeleton {
    0% {
        background-position: 120% 0;
    }

    100% {
        background-position: -120% 0;
    }
}

@media (max-width: 575.98px) {
    .pi-button {
        white-space: normal;
    }

    .pi-modal {
        align-items: flex-end;
        padding: 0;
    }

    .pi-modal__dialog {
        border-radius: var(--pi-radius-xl) var(--pi-radius-xl) 0 0;
        max-height: calc(100vh - 24px);
    }
}