/*
 * Filum.
 *
 * Direction: a shift board and a ledger, not a messenger. The people using this
 * are mid-task in a back office, so the sidebar answers "who is at their desk"
 * and the thread reads as a timestamped log they can scan and cite. Bubbles,
 * alternating sides and a floating round trigger were all considered and
 * rejected: they scan badly in a 26rem drawer and say nothing about the work.
 *
 * Every colour is derived from Filament's own tokens, so the chat inherits
 * whatever palette the panel already uses. Note the shape those tokens take:
 * Filament 4 and 5 are built on Tailwind 4 and publish complete colour values
 * ("--primary-600: oklch(0.44 0.03 322)"), NOT the space-separated RGB channels
 * Filament 3 used. They must therefore be consumed directly -- var(--primary-600)
 * -- and never wrapped, because rgb(var(--primary-600)) is invalid CSS and every
 * declaration holding it is silently dropped. Translucency comes from color-mix
 * for the same reason. The literal after each token is a genuine fallback for
 * rendering outside a Filament layout, not decoration.
 */

.filum-root {
    /* Six roles, all inherited from the host panel. */
    --filum-ink: var(--gray-50, #f9fafb);
    --filum-recess: #fff;
    --filum-hairline: color-mix(in oklab, var(--gray-950, #030712) 10%, transparent);
    --filum-text: var(--gray-950, #030712);
    --filum-whisper: var(--gray-500, #6b7280);
    --filum-signal: var(--primary-600, #4f46e5);
    --filum-live: var(--success-600, #16a34a);

    --filum-radius: 0.75rem;
    --filum-radius-sm: 0.375rem;
    --filum-pad: 0.875rem;
    --filum-gutter: 3.25rem;
    --filum-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    color: var(--filum-text);
    font-size: 0.875rem;
    line-height: 1.55;
}

/*
 * Filament puts .dark on the html element. Inverting ink and recess -- rather
 * than lightening both -- is what makes the sidebar read as recessed into the
 * page in dark mode and raised out of it in light, matching how Filament's own
 * sections sit against the page background.
 */
.dark .filum-root {
    --filum-ink: var(--gray-950, #030712);
    --filum-recess: var(--gray-900, #111827);
    --filum-hairline: color-mix(in oklab, #fff 12%, transparent);
    --filum-text: var(--gray-100, #f3f4f6);
    --filum-whisper: var(--gray-400, #9ca3af);
    --filum-signal: var(--primary-400, #818cf8);
    --filum-live: var(--success-400, #4ade80);
}

.filum-root :focus-visible {
    outline: 2px solid var(--filum-signal);
    outline-offset: 2px;
}

/* Shell ------------------------------------------------------------------- */

.filum-panel {
    display: grid;
    grid-template-columns: minmax(0, 17rem) minmax(0, 1fr);
    background: var(--filum-recess);
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius);
    box-shadow: 0 1px 2px color-mix(in oklab, var(--gray-950, #030712) 5%, transparent);
    overflow: hidden;
}

/* The thread scrolls, not the page. */
.filum-mode-page .filum-panel {
    height: clamp(28rem, calc(100vh - 17rem), 46rem);
}

.filum-scroll {
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--filum-hairline) transparent;
}

.filum-scroll::-webkit-scrollbar {
    width: 0.5rem;
    height: 0.5rem;
}

.filum-scroll::-webkit-scrollbar-thumb {
    background: var(--filum-hairline);
    border-radius: 9999px;
}

.filum-scroll::-webkit-scrollbar-track {
    background: transparent;
}

/* The eyebrow: every small uppercase label in the interface. */
.filum-eyebrow {
    margin: 0;
    color: var(--filum-whisper);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    line-height: 1.4;
    text-transform: uppercase;
}

/* Shift board ------------------------------------------------------------- */

.filum-board {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--filum-ink);
    border-inline-end: 1px solid var(--filum-hairline);
}

.filum-board-head {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: var(--filum-pad);
    border-block-end: 1px solid var(--filum-hairline);
}

.filum-search {
    width: 100%;
    padding: 0.375rem 0.625rem;
    background: var(--filum-recess);
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    color: inherit;
    font: inherit;
}

.filum-search::placeholder {
    color: var(--filum-whisper);
}

.filum-board-body {
    flex: 1 1 auto;
    min-height: 0;
    padding: 0.5rem;
}

/* A shift group: HERE, then AWAY. The count is information, so it is shown. */
.filum-shift {
    margin: 0 0 0.25rem;
    padding: 0;
}

.filum-shift + .filum-shift {
    margin-top: 0.75rem;
}

.filum-shift-head {
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
    padding: 0.375rem 0.5rem;
}

.filum-shift-count {
    font-family: var(--filum-mono);
    font-variant-numeric: tabular-nums;
}

.filum-people {
    list-style: none;
    margin: 0;
    padding: 0;
}

.filum-person {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.4375rem 0.5rem;
    background: transparent;
    border: 0;
    border-radius: var(--filum-radius-sm);
    color: inherit;
    cursor: pointer;
    font: inherit;
    text-align: start;
}

.filum-person:hover {
    background: color-mix(in oklab, var(--filum-text) 6%, transparent);
}

.filum-person-active {
    background: color-mix(in oklab, var(--filum-signal) 12%, transparent);
}

.filum-person-name {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.8125rem;
}

.filum-person-active .filum-person-name {
    font-weight: 600;
}

/*
 * Presence rides on the avatar ring rather than a separate dot: the shift
 * heading already says who is here, and one signal per fact keeps the row calm.
 */
.filum-avatar {
    display: grid;
    place-items: center;
    width: 1.75rem;
    height: 1.75rem;
    flex: 0 0 auto;
    border-radius: 9999px;
    background: color-mix(in oklab, var(--filum-text) 10%, transparent);
    box-shadow: 0 0 0 1px var(--filum-hairline);
    color: var(--filum-text);
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 1;
    overflow: hidden;
}

.filum-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.filum-avatar-live {
    box-shadow:
        0 0 0 2px var(--filum-recess),
        0 0 0 3.5px var(--filum-live);
}

.filum-board .filum-avatar-live {
    box-shadow:
        0 0 0 2px var(--filum-ink),
        0 0 0 3.5px var(--filum-live);
}

.filum-count {
    flex: 0 0 auto;
    min-width: 1.25rem;
    padding: 0 0.375rem;
    border-radius: 9999px;
    background: var(--filum-signal);
    color: var(--filum-recess);
    font-family: var(--filum-mono);
    font-size: 0.625rem;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    line-height: 1.25rem;
    text-align: center;
}

/* Ledger ------------------------------------------------------------------ */

.filum-conversation {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: var(--filum-recess);
}

.filum-thread-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem var(--filum-pad);
    border-block-end: 1px solid var(--filum-hairline);
}

.filum-thread-name {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
    font-weight: 600;
}

.filum-thread-state {
    flex: 0 0 auto;
    color: var(--filum-whisper);
}

.filum-thread-state-live {
    color: var(--filum-live);
}

.filum-back {
    display: none;
    flex: 0 0 auto;
    padding: 0.25rem 0.5rem;
    background: transparent;
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    color: var(--filum-whisper);
    cursor: pointer;
    font: inherit;
    font-size: 0.75rem;
    line-height: 1.2;
}

.filum-thread {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    padding: 0.75rem 0;
}

.filum-log {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

/*
 * The signature: a fixed monospace time gutter. One continuous column with the
 * times in a true tabular rule down the left, so a long thread scans like a log
 * -- and so nothing has to reflow when the drawer is 26rem wide, which is where
 * alternating bubbles fall apart.
 */
.filum-row {
    display: grid;
    grid-template-columns: var(--filum-gutter) minmax(0, 1fr);
    align-items: start;
    column-gap: 0.5rem;
    padding-inline-end: var(--filum-pad);
}

.filum-when {
    padding-top: 0.3125rem;
    color: var(--filum-whisper);
    font-family: var(--filum-mono);
    font-size: 0.6875rem;
    font-variant-numeric: tabular-nums;
    text-align: end;
}

.filum-said {
    min-width: 0;
    padding: 0.25rem 0.625rem;
    border-inline-start: 2px solid transparent;
    border-radius: 0 var(--filum-radius-sm) var(--filum-radius-sm) 0;
}

/* Mine, said twice and no more: an accent rail and a wash of the same colour. */
.filum-row-mine .filum-said {
    background: color-mix(in oklab, var(--filum-signal) 10%, transparent);
    border-inline-start-color: var(--filum-signal);
}

.filum-who {
    display: block;
    margin-bottom: 0.0625rem;
    color: var(--filum-whisper);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.filum-row-mine .filum-who {
    color: var(--filum-signal);
}

.filum-what {
    margin: 0;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

/* A day changes: the one divider in the interface, and it carries a fact. */
.filum-day {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin: 0.75rem var(--filum-pad) 0.5rem;
}

.filum-day::before,
.filum-day::after {
    content: "";
    flex: 1 1 auto;
    height: 1px;
    background: var(--filum-hairline);
}

.filum-older {
    align-self: center;
    margin-bottom: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: transparent;
    border: 1px solid var(--filum-hairline);
    border-radius: 9999px;
    color: var(--filum-whisper);
    cursor: pointer;
    font: inherit;
    font-size: 0.75rem;
}

.filum-older:hover {
    color: var(--filum-text);
}

/* Composer ---------------------------------------------------------------- */

.filum-composer {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.5rem;
    padding: var(--filum-pad);
    background: var(--filum-ink);
    border-block-start: 1px solid var(--filum-hairline);
}

.filum-input {
    flex: 1 1 10rem;
    min-width: 0;
    padding: 0.4375rem 0.625rem;
    background: var(--filum-recess);
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    color: inherit;
    font: inherit;
    resize: vertical;
}

.filum-input::placeholder {
    color: var(--filum-whisper);
}

.filum-send {
    flex: 0 0 auto;
    padding: 0.4375rem 0.875rem;
    background: var(--filum-signal);
    border: 0;
    border-radius: var(--filum-radius-sm);
    color: var(--filum-recess);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
}

.filum-send:hover {
    background: color-mix(in oklab, var(--filum-signal) 85%, var(--filum-text));
}

.filum-error {
    flex: 1 0 100%;
    margin: 0;
    color: var(--danger-600, #dc2626);
    font-size: 0.75rem;
}

.dark .filum-error {
    color: var(--danger-400, #f87171);
}

.filum-empty {
    margin: auto;
    padding: var(--filum-pad);
    color: var(--filum-whisper);
    text-align: center;
    text-wrap: balance;
}

.filum-board-body .filum-empty {
    margin: 0;
    padding-block: 1.5rem;
}

/* Drawer ------------------------------------------------------------------ */

/*
 * The overlay docks into the bottom corner as a drawer with a tab, flush to the
 * viewport edges -- the shape a tool panel takes, not the floating circle a
 * consumer widget takes. Only the corner that faces the page is rounded.
 */
.filum-mode-overlay {
    --filum-gutter: 2.875rem;

    position: fixed;
    inset-block-end: 0;
    inset-inline-end: 0;
    z-index: 40;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.filum-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    order: 2;
    padding: 0.5rem 0.875rem;
    background: var(--filum-recess);
    border: 1px solid var(--filum-hairline);
    border-inline-end: 0;
    border-block-end: 0;
    border-start-start-radius: var(--filum-radius-sm);
    box-shadow: 0 -2px 12px color-mix(in oklab, var(--gray-950, #030712) 12%, transparent);
    color: var(--filum-text);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
}

.filum-tab-label {
    font-size: 0.8125rem;
}

/* One pane at a time in the drawer: two panes in 26rem is two cramped panes. */
.filum-mode-overlay .filum-panel {
    order: 1;
    grid-template-columns: minmax(0, 1fr);
    width: min(26rem, 100vw);
    height: min(32rem, calc(100vh - 6rem));
    border-inline-end: 0;
    border-block-end: 0;
    border-radius: var(--filum-radius) 0 0 0;
    box-shadow: 0 -8px 32px color-mix(in oklab, var(--gray-950, #030712) 24%, transparent);
    animation: filum-rise 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.filum-mode-overlay .filum-board {
    border-inline-end: 0;
}

.filum-mode-overlay .filum-back {
    display: block;
}

@keyframes filum-rise {
    from {
        opacity: 0;
        transform: translateY(0.75rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    .filum-mode-overlay .filum-panel {
        animation: none;
    }
}

/* Narrow ------------------------------------------------------------------ */

@media (max-width: 48rem) {
    .filum-mode-page .filum-panel {
        grid-template-columns: minmax(0, 1fr);
        height: clamp(24rem, calc(100vh - 13rem), 40rem);
    }

    .filum-mode-page .filum-board {
        border-inline-end: 0;
        border-block-end: 1px solid var(--filum-hairline);
    }
}

.filum-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    clip-path: inset(50%);
    overflow: hidden;
    white-space: nowrap;
}

/* Groups and invitations ---------------------------------------------------- */

.filum-hash {
    display: grid;
    place-items: center;
    width: 1.75rem;
    height: 1.75rem;
    flex: 0 0 auto;
    color: var(--filum-whisper);
    font-family: var(--filum-mono);
    font-weight: 600;
}

.filum-avatar-group {
    background: transparent;
    box-shadow: 0 0 0 1px var(--filum-hairline);
    color: var(--filum-whisper);
    font-family: var(--filum-mono);
}

.filum-invitation {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4375rem 0.5rem;
}

.filum-invited-by {
    grid-column: 1 / -1;
    order: 3;
    color: var(--filum-whisper);
    font-size: 0.6875rem;
}

.filum-accept,
.filum-decline {
    padding: 0.125rem 0.5rem;
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    background: transparent;
    color: inherit;
    cursor: pointer;
    font: inherit;
    font-size: 0.6875rem;
}

.filum-accept {
    background: color-mix(in oklab, var(--filum-signal) 16%, transparent);
    border-color: transparent;
}

.filum-new-group {
    padding: 0.375rem 0.5rem 0;
}

.filum-invite > summary {
    list-style: none;
    cursor: pointer;
}

.filum-invite > summary::-webkit-details-marker {
    display: none;
}

.filum-invite-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0.375rem 0 0;
    padding: 0;
    list-style: none;
}

/* The owner's controls take the whole width: the header is one flex row of
   chrome, and a field or a roster wrapping into the middle of it would push the
   group's own name off the line it belongs on. */
.filum-rename,
.filum-roster {
    flex: 1 1 100%;
    min-width: 0;
}

.filum-roster {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.filum-roster > li {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* Reactions ---------------------------------------------------------------- */

/*
 * Two things live in this row and they are not the same kind of thing. A
 * reaction somebody left is part of the record, so it is always visible. The
 * control for leaving one is chrome, and in a log this dense chrome has to earn
 * its place -- so it is revealed on hover, the way Slack and Discord reveal
 * theirs, rather than sitting under all fifty messages at once.
 */

.filum-root [x-cloak] {
    display: none !important;
}

.filum-reactions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
    /* No margin until something is actually said, so an empty row costs nothing. */
    min-height: 1.5rem;
}

.filum-reactions-said {
    margin-top: 0.375rem;
}

.filum-reaction {
    display: inline-flex;
    align-items: center;
    gap: 0.3125rem;
    height: 1.5rem;
    padding: 0 0.5rem 0 0.4375rem;
    background: color-mix(in oklab, var(--filum-text) 6%, transparent);
    border: 1px solid transparent;
    border-radius: 9999px;
    color: var(--filum-whisper);
    cursor: pointer;
    font: inherit;
    line-height: 1;
    transition: background-color 120ms ease, border-color 120ms ease;
}

.filum-reaction:hover {
    background: color-mix(in oklab, var(--filum-text) 11%, transparent);
}

/*
 * Yours is stated with the same accent own messages already use, so the ledger
 * has one meaning for that colour rather than two.
 */
.filum-reaction-mine {
    background: color-mix(in oklab, var(--filum-signal) 14%, transparent);
    border-color: color-mix(in oklab, var(--filum-signal) 38%, transparent);
    color: var(--filum-signal);
}

.filum-reaction-mine:hover {
    background: color-mix(in oklab, var(--filum-signal) 20%, transparent);
}

/* Emoji render at their own optical size; the surrounding type stays 0.875rem. */
.filum-reaction-emoji {
    font-size: 0.8125rem;
    line-height: 1;
}

/* Counts share the tabular face the time gutter uses -- numbers read as numbers. */
.filum-reaction-count {
    font-family: var(--filum-mono);
    font-size: 0.6875rem;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

/* The opener ---------------------------------------------------------------- */

.filum-reaction-add {
    display: grid;
    place-items: center;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 9999px;
    color: var(--filum-whisper);
    cursor: pointer;
    /* Transparent rather than hidden: the row keeps its height, so revealing the
       control moves nothing under the pointer. */
    opacity: 0;
    transition: opacity 120ms ease, background-color 120ms ease, color 120ms ease;
}

.filum-reaction-add svg {
    width: 1rem;
    height: 1rem;
}

.filum-row:hover .filum-reaction-add,
.filum-reactions:focus-within .filum-reaction-add,
.filum-reaction-add[aria-expanded='true'] {
    opacity: 1;
}

.filum-reaction-add:hover,
.filum-reaction-add[aria-expanded='true'] {
    background: color-mix(in oklab, var(--filum-text) 10%, transparent);
    color: var(--filum-text);
}

/* Touch has no hover, so there it stays put rather than being unreachable. */
@media (hover: none) {
    .filum-reaction-add {
        opacity: 1;
    }
}

/* The set ------------------------------------------------------------------- */

/*
 * Inline in the row rather than floating above the thread. A popover inside a
 * scrolling log needs clipping and stacking handled, and would cover the very
 * messages being reacted to -- which is the one thing a ledger must not do to
 * itself.
 */
.filum-reaction-set {
    display: inline-flex;
    align-items: center;
    gap: 0.0625rem;
    padding: 0.125rem;
    background: var(--filum-ink);
    border: 1px solid var(--filum-hairline);
    border-radius: 9999px;
}

.filum-reaction-set button {
    display: grid;
    place-items: center;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 9999px;
    cursor: pointer;
    font-size: 0.875rem;
    line-height: 1;
    transition: background-color 120ms ease, transform 120ms ease;
}

.filum-reaction-set button:hover {
    background: color-mix(in oklab, var(--filum-text) 12%, transparent);
    transform: scale(1.18);
}

@media (prefers-reduced-motion: reduce) {
    .filum-reaction,
    .filum-reaction-add,
    .filum-reaction-set button {
        transition: none;
    }

    .filum-reaction-set button:hover {
        transform: none;
    }
}

/* Replies and files --------------------------------------------------------- */

/*
 * One mark means "this answers that", and it appears in exactly two places: the
 * quote above an answer, and the strip above the composer while you write one.
 * Two places, one glyph, no boxes -- which is what lets the quote sit inside an
 * own-message without a second rail running down beside the accent one.
 */

.filum-quote {
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
    margin-bottom: 0.1875rem;
    color: var(--filum-whisper);
    font-size: 0.75rem;
}

.filum-quote::before {
    content: '\21B3';
}

/* The ledger draws its mark, the composer carries one in the markup for the
   screen reader to skip -- both land on the same glyph at the same weight. */
.filum-quote::before,
.filum-replying-mark {
    flex: none;
    color: color-mix(in oklab, var(--filum-whisper) 70%, transparent);
    font-size: 0.8125rem;
    line-height: 1;
}

.filum-replying-mark {
    color: color-mix(in oklab, var(--filum-signal) 80%, transparent);
}

/* The author reads as the eyebrow it is, one step quieter than a sender name. */
.filum-quote-who {
    flex: 0 0 auto;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.filum-quote-what {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    opacity: 0.85;
}

/* Files ---------------------------------------------------------------------- */

.filum-files {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.375rem;
    margin-top: 0.4375rem;
}

/*
 * Rectangular, not a pill: a reaction is a tally and a file is a thing. The size
 * sits at the trailing edge in the same tabular face the time gutter uses, so
 * numbers line up down a column of files exactly as times do down the thread.
 */
.filum-file {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    max-width: min(20rem, 100%);
    padding: 0.375rem 0.5rem;
    background: color-mix(in oklab, var(--filum-text) 5%, transparent);
    border: 1px solid var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    color: inherit;
    font-size: 0.8125rem;
    text-decoration: none;
    transition: background-color 120ms ease, border-color 120ms ease;
}

.filum-file:hover {
    background: color-mix(in oklab, var(--filum-text) 9%, transparent);
    border-color: color-mix(in oklab, var(--filum-signal) 40%, transparent);
}

.filum-file svg {
    width: 1.125rem;
    height: 1.125rem;
    flex: none;
    color: var(--filum-whisper);
}

.filum-file-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.filum-file-size {
    flex: none;
    color: var(--filum-whisper);
    font-family: var(--filum-mono);
    font-size: 0.6875rem;
    font-variant-numeric: tabular-nums;
}

/*
 * A contact sheet, not a gallery: images share one height and let width fall
 * where it may, so a row of them aligns along the bottom however differently
 * they were shot. Sizing by width instead would leave a ragged edge.
 */
.filum-file-image {
    padding: 0;
    max-width: none;
    border-radius: var(--filum-radius-sm);
    overflow: hidden;
    line-height: 0;
}

.filum-file-image img {
    display: block;
    height: 6.5rem;
    width: auto;
    max-width: 14rem;
    object-fit: cover;
}

/* Composer ------------------------------------------------------------------- */

/*
 * The two trays are deliberately unalike, because they answer different
 * questions. What you are answering is tinted with the accent and carries the
 * same mark the quote does. What is about to go with the message is shown as the
 * very chips it will become, so the composer previews its own outcome.
 */
.filum-replying {
    flex: 1 0 100%;
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
    margin-bottom: 0.4375rem;
    color: var(--filum-signal);
    font-size: 0.75rem;
}

.filum-replying-what {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--filum-whisper);
}

.filum-replying-what em {
    color: var(--filum-text);
    font-style: normal;
}

.filum-picked {
    flex: 1 0 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin: 0 0 0.4375rem;
    padding: 0;
    list-style: none;
}

.filum-picked li {
    display: inline-flex;
    align-items: center;
    gap: 0.4375rem;
    max-width: min(16rem, 100%);
    padding: 0.3125rem 0.375rem 0.3125rem 0.5rem;
    background: color-mix(in oklab, var(--filum-text) 5%, transparent);
    border: 1px dashed var(--filum-hairline);
    border-radius: var(--filum-radius-sm);
    font-size: 0.75rem;
}

.filum-picked-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.filum-replying-drop,
.filum-picked button {
    flex: none;
    display: grid;
    place-items: center;
    width: 1.125rem;
    height: 1.125rem;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 9999px;
    color: var(--filum-whisper);
    cursor: pointer;
    font: inherit;
    font-size: 0.9375rem;
    line-height: 1;
}

.filum-replying-drop:hover,
.filum-picked button:hover {
    background: color-mix(in oklab, var(--filum-text) 12%, transparent);
    color: var(--filum-text);
}

/*
 * Borderless, and the same height as Send. Two outlined boxes side by side would
 * read as two equal choices, and attaching a file is not equal to sending.
 */
.filum-attach {
    position: relative;
    display: grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    flex: none;
    border-radius: var(--filum-radius-sm);
    color: var(--filum-whisper);
    cursor: pointer;
}

.filum-attach:hover {
    background: color-mix(in oklab, var(--filum-text) 8%, transparent);
    color: var(--filum-text);
}

.filum-attach:focus-within {
    outline: 2px solid var(--filum-signal);
    outline-offset: 2px;
}

.filum-attach input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.filum-attach svg {
    width: 1.125rem;
    height: 1.125rem;
}

/* Upload in flight: the control says so rather than looking inert. */
.filum-attach-busy {
    position: absolute;
    inset-block-end: 0.125rem;
    inset-inline-end: 0.125rem;
    width: 0.375rem;
    height: 0.375rem;
    border-radius: 9999px;
    background: var(--filum-signal);
    animation: filum-pulse 900ms ease-in-out infinite;
}

@keyframes filum-pulse {
    50% { opacity: 0.2; }
}

@media (prefers-reduced-motion: reduce) {
    .filum-file {
        transition: none;
    }

    .filum-attach-busy {
        animation: none;
    }
}