/*
 * @ mention picker for the chat composer.
 *
 * Like the demo, the overview and category details live in one glassy card.
 * JavaScript swaps the card's content and updates its height so navigation
 * feels spatially stable while results continue to come from live app data.
 */

.mention-menu {
    --mention-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    position: absolute;
    z-index: 1000;
    right: auto;
    bottom: calc(100% + 8px);
    left: 0;
    display: block;
    width: 100%;
    max-width: none;
    height: 0;
    max-height: min(430px, calc(100vh - 110px));
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--surface-elevated) 60%, var(--surface-elevated-border));
    border-radius: 14px;
    color: var(--text-color);
    background: color-mix(in srgb, var(--surface-elevated) 92%, transparent);
    box-shadow: var(--surface-elevated-shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px) scale(0.975);
    transform-origin: bottom center;
    visibility: hidden;
    backdrop-filter: blur(28px) saturate(1.3);
    -webkit-backdrop-filter: blur(28px) saturate(1.3);
    transition:
        height 360ms var(--mention-ease-out),
        opacity 170ms ease,
        transform 240ms var(--mention-ease-out),
        visibility 0s linear 240ms;
}

.mention-menu.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    visibility: visible;
    transition:
        height 360ms var(--mention-ease-out),
        opacity 170ms ease,
        transform 240ms var(--mention-ease-out),
        visibility 0s linear 0s;
}

.mention-menu__body {
    display: flex;
    width: 100%;
    height: 100%;
    min-height: 0;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 8px;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    scrollbar-width: thin;
}

.mention-menu__intro {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px 7px;
}

.mention-menu__mark {
    display: grid;
    width: 30px;
    height: 30px;
    flex: 0 0 auto;
    border-radius: 9px;
    color: var(--primary-color);
    background: var(--primary-light);
    font-size: 16px;
    font-weight: 680;
    place-items: center;
}

.mention-menu__intro-copy {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
    gap: 1px;
}

.mention-menu__intro-copy strong {
    font-size: 13px;
    font-weight: 640;
    letter-spacing: -0.01em;
}

.mention-menu__intro-copy span {
    color: var(--text-color-tertiary);
    font-size: 11.5px;
}

.mention-menu__shortcut {
    display: inline-flex;
    height: 22px;
    align-items: center;
    justify-content: center;
    padding: 0 7px;
    border: 1px solid var(--surface-elevated-border);
    border-radius: 6px;
    color: var(--text-color-tertiary);
    background: var(--surface-muted);
    font-size: 10px;
    font-weight: 560;
}

.mention-menu__section-title {
    margin: 12px 10px 6px;
    color: var(--text-color-tertiary);
    font-size: 10.5px;
    font-weight: 650;
    letter-spacing: 0.065em;
    text-transform: uppercase;
}

.mention-menu__category {
    display: flex;
    flex-direction: column;
}

.mention-menu__category + .mention-menu__category {
    margin-top: 2px;
}

.mention-menu__category-header {
    display: flex;
    width: 100%;
    height: 46px;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 8px;
    color: var(--text-color);
    background: transparent;
    font-family: inherit;
    text-align: left;
    transition: background-color 110ms ease, transform 120ms ease;
}

.mention-menu__category-header.is-highlighted {
    background: var(--surface-interactive-hover);
}

.mention-menu__category-icon,
.mention-menu__item-icon {
    display: grid;
    flex: 0 0 auto;
    color: var(--text-color-secondary);
    background: var(--surface-muted);
    place-items: center;
}

.mention-menu__category-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

.mention-menu__category-icon svg,
.mention-menu__item-icon svg {
    width: 15px;
    height: 15px;
}

.mention-menu__category-copy {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
    gap: 1px;
}

.mention-menu__category-label,
.mention-menu__category-description {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mention-menu__category-label {
    font-size: 13px;
    font-weight: 560;
    letter-spacing: -0.01em;
}

.mention-menu__category-description {
    color: var(--text-color-tertiary);
    font-size: 10.5px;
    line-height: 1.25;
}

.mention-menu__category-count {
    min-width: 22px;
    padding: 2px 6px;
    border-radius: 999px;
    color: var(--text-color-tertiary);
    background: var(--surface-muted);
    font-size: 10.5px;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

.mention-menu__category-chevron {
    width: 8px;
    height: 8px;
    margin: 0 4px 0 0;
    border: solid var(--text-color-tertiary);
    border-width: 0 1.5px 1.5px 0;
    transform: rotate(-45deg);
}

.mention-menu__detail-header {
    display: flex;
    min-height: 65px;
    flex: 0 0 auto;
    align-items: center;
    gap: 11px;
    margin: -8px -8px 0;
    padding: 14px 15px 13px;
    border-bottom: 1px solid var(--border-color);
}

.mention-menu__back {
    display: grid;
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
    border-radius: 9px;
    color: var(--text-color-secondary);
    background: var(--surface-muted);
    place-items: center;
}

.mention-menu__back::before {
    width: 9px;
    height: 9px;
    border: solid currentColor;
    border-width: 0 1.5px 1.5px 0;
    content: "";
    transform: rotate(135deg) translate(-1px, -1px);
}

.mention-menu__detail-heading {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
    gap: 2px;
}

.mention-menu__detail-heading strong {
    overflow: hidden;
    font-size: 14.5px;
    font-weight: 640;
    letter-spacing: -0.018em;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mention-menu__detail-heading span {
    color: var(--text-color-tertiary);
    font-size: 11.5px;
}

.mention-menu__search-wrap {
    position: relative;
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    margin: 0 -8px;
    padding: 10px 12px 7px;
}

.mention-menu__search-icon {
    position: absolute;
    left: 24px;
    width: 14px;
    height: 14px;
    border: 1.5px solid var(--text-color-tertiary);
    border-radius: 50%;
    pointer-events: none;
}

.mention-menu__search-icon::after {
    position: absolute;
    right: -4px;
    bottom: -2px;
    width: 5px;
    height: 1.5px;
    background: var(--text-color-tertiary);
    content: "";
    transform: rotate(45deg);
}

.mention-menu__search-wrap input {
    width: 100%;
    height: 38px;
    padding: 0 12px 0 36px;
    border: 1px solid transparent;
    border-radius: 10px;
    outline: 0;
    color: var(--text-color);
    background: var(--surface-muted);
    font-size: 12.5px;
}

.mention-menu__search-wrap input:focus {
    border-color: var(--surface-elevated-border);
    background: var(--surface-elevated);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.mention-menu__section {
    display: flex;
    flex-direction: column;
}

.mention-menu__section--with-divider {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.mention-menu__section-label {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 1px 10px 2px;
    color: var(--text-color-tertiary);
    font-size: 10px;
    font-weight: 650;
    letter-spacing: 0.065em;
    text-transform: uppercase;
}

.mention-menu__section-label-dot {
    width: 5px;
    height: 5px;
    flex: 0 0 auto;
    border-radius: 50%;
}

.mention-menu__section-label-count {
    margin-left: auto;
    color: var(--text-color-tertiary);
    font-size: 9.5px;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0;
}

.mention-menu__list,
.mention-menu__detail-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mention-menu__item {
    display: flex;
    width: 100%;
    min-height: 52px;
    align-items: center;
    gap: 11px;
    padding: 7px 9px;
    border-radius: 10px;
    color: var(--text-color);
    background: transparent;
    cursor: pointer;
    text-align: left;
    transition: background-color 110ms ease;
}

.mention-menu__item.is-highlighted,
.mention-menu__item:focus-visible {
    background: var(--surface-interactive-hover);
}

.mention-menu__item-icon {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: 9px;
    background: var(--surface-elevated);
}

.mention-menu__item-icon--bare {
    color: var(--text-color);
    background: var(--surface-elevated) !important;
}

.mention-menu__item-icon--bare svg,
.mention-menu__item-icon--bare img {
    display: block;
    width: 22px;
    height: 22px;
    object-fit: cover;
}

.mention-menu__item-icon--bare img {
    border-radius: 50%;
}

.mention-menu__item-content {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
}

.mention-menu__item-title {
    overflow: hidden;
    color: var(--text-color);
    font-size: 13px;
    font-weight: 560;
    letter-spacing: -0.01em;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mention-menu__item-description {
    overflow: hidden;
    margin-top: 2px;
    color: var(--text-color-tertiary);
    font-size: 10.5px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mention-menu__add-icon {
    display: grid;
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
    border-radius: 7px;
    color: var(--text-color-tertiary);
    background: var(--surface-muted);
    font-size: 18px;
    line-height: 1;
    place-items: center;
}

.mention-menu__add-icon svg {
    width: 12px;
    height: 12px;
}

.mention-menu__empty {
    padding: 26px 14px 30px;
    color: var(--text-color-tertiary);
    font-size: 12px;
    text-align: center;
}

@media (hover: hover) and (pointer: fine) {
    .mention-menu__category-header:hover,
    .mention-menu__item:hover,
    .mention-menu__back:hover {
        color: var(--text-color);
        background: var(--surface-interactive-hover);
    }

    .mention-menu__item:hover .mention-menu__add-icon {
        color: var(--primary-color);
        background: var(--primary-light);
    }
}

.mention-menu__category-header:focus-visible,
.mention-menu__item:focus-visible,
.mention-menu__back:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

@media (prefers-reduced-motion: reduce) {
    .mention-menu,
    .mention-menu.open,
    .mention-menu__category-header,
    .mention-menu__item {
        transition: none;
    }
}