.system-message-stack {
    display: grid;
    gap: .65rem;
    width: min(calc(100% - 2rem), 1320px);
    margin: 0 auto 1rem;
}

.system-message-banner {
    --message-accent: #087f8c;
    display: flex;
    align-items: flex-start;
    gap: .85rem;
    min-width: 0;
    padding: .9rem 1.05rem;
    overflow: hidden;
    border: 1px solid rgba(8, 127, 140, .22);
    border-left: 4px solid var(--message-accent);
    border-radius: 14px;
    color: #173f50;
    background: linear-gradient(120deg, #f2fbfb 0%, #f8fcff 72%, #eef9fb 100%);
    box-shadow: 0 8px 24px rgba(36, 76, 91, .08);
}

.system-message-banner__icon {
    display: grid;
    place-items: center;
    width: 2.15rem;
    height: 2.15rem;
    flex: 0 0 auto;
    border-radius: 10px;
    color: var(--message-accent);
    background: rgba(8, 127, 140, .1);
}

.system-message-banner__icon svg { width: 1.15rem; height: 1.15rem; }

@media (prefers-reduced-motion: no-preference) {
    .system-message-banner__icon {
        animation: system-message-icon-pulse 3s ease-in-out infinite;
    }
}

@keyframes system-message-icon-pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(8, 127, 140, 0);
    }
    50% {
        transform: scale(1.06);
        box-shadow: 0 0 0 5px rgba(8, 127, 140, .08);
    }
}

@keyframes system-message-icon-fade {
    0%, 100% { opacity: 1; }
    50% { opacity: .55; }
}

.system-message-banner__content { min-width: 0; padding-top: .05rem; }
.system-message-banner__content strong { display: block; margin-bottom: .12rem; color: #153c4a; font-size: .9rem; letter-spacing: -.01em; }
.system-message-banner__content p { margin: 0; color: #486775; font-size: .84rem; line-height: 1.5; white-space: pre-line; }

.system-message-admin {
    --message-admin-ink: #17384a;
    --message-admin-muted: #637a87;
    --message-admin-border: #dce7eb;
    --message-admin-brand: #087f8c;
    --message-admin-brand-dark: #075e69;
    --message-admin-soft: #e9f7f7;
}

.system-message-admin__main { display: grid; align-content: start; gap: 1.15rem; min-width: 0; }
.system-message-admin__hero { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; }

.system-message-admin__summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .8rem;
}

.system-message-admin__summary article {
    display: grid;
    gap: .2rem;
    min-width: 0;
    padding: 1rem 1.1rem;
    border: 1px solid var(--message-admin-border);
    border-radius: 15px;
    background: rgba(255, 255, 255, .92);
    box-shadow: 0 8px 22px rgba(34, 67, 80, .055);
}

.system-message-admin__summary strong { color: var(--message-admin-ink); font-size: 1.55rem; line-height: 1; letter-spacing: -.04em; }
.system-message-admin__summary span { color: var(--message-admin-muted); font-size: .75rem; font-weight: 750; }

.system-message-admin__panel,
.system-message-editor__card {
    border: 1px solid var(--message-admin-border);
    border-radius: 19px;
    background: #fff;
    box-shadow: 0 12px 34px rgba(34, 67, 80, .07);
}

.system-message-admin__panel { padding: 1.35rem; }
.system-message-admin__panel > header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.system-message-admin__panel h2 { margin: .15rem 0 .25rem; color: var(--message-admin-ink); font-size: 1.25rem; letter-spacing: -.025em; }
.system-message-admin__panel header p { margin: 0; color: var(--message-admin-muted); font-size: .83rem; line-height: 1.5; }
.system-message-admin__count { padding: .35rem .6rem; border-radius: 999px; color: #526d78; background: #eff4f6; font-size: .72rem; font-weight: 800; white-space: nowrap; }
.system-message-admin__list { display: grid; gap: .75rem; }

.system-message-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: .9rem;
    padding: 1rem;
    border: 1px solid var(--message-admin-border);
    border-radius: 15px;
    background: #fff;
    transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.system-message-card:hover { transform: translateY(-1px); border-color: #c8d9df; box-shadow: 0 8px 22px rgba(34, 67, 80, .08); }
.system-message-card.is-hidden { background: #fafcfc; }
.system-message-card__state { display: inline-flex; align-items: center; gap: .38rem; align-self: start; padding: .33rem .55rem; border-radius: 999px; color: #17704f; background: #e6f5ed; font-size: .64rem; font-weight: 850; letter-spacing: .025em; text-transform: uppercase; white-space: nowrap; }
.system-message-card__state span { width: .42rem; height: .42rem; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 3px rgba(23, 112, 79, .09); }
.system-message-card.is-hidden .system-message-card__state { color: #6d777c; background: #e9eef0; }
.system-message-card.is-hidden .system-message-card__state span { box-shadow: none; }
.system-message-card__content { min-width: 0; }
.system-message-card__content h3 { margin: 0 0 .25rem; color: var(--message-admin-ink); font-size: 1rem; line-height: 1.25; letter-spacing: -.015em; }
.system-message-card__content > p { display: -webkit-box; margin: 0 0 .6rem; overflow: hidden; color: #4e6874; font-size: .82rem; line-height: 1.5; -webkit-box-orient: vertical; -webkit-line-clamp: 2; white-space: pre-line; }
.system-message-card__meta { display: flex; align-items: center; flex-wrap: wrap; gap: .45rem .9rem; color: #788b94; font-size: .69rem; font-weight: 700; }
.system-message-card__meta span { display: inline-flex; align-items: center; gap: .32rem; }
.system-message-card__meta svg { width: .85rem; height: .85rem; color: var(--message-admin-brand); }
.system-message-card__actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: .4rem; }
.system-message-card__actions form { display: inline-flex; margin: 0; }
.system-message-card__delete { display: grid; place-items: center; width: 2rem; height: 2rem; padding: 0; border: 1px solid #ecd4d1; border-radius: 9px; color: #a1433f; background: #fff8f7; font-size: 1.1rem; line-height: 1; cursor: pointer; transition: background .16s ease, border-color .16s ease, transform .16s ease; }
.system-message-card__delete:hover { transform: translateY(-1px); border-color: #dfb5b0; background: #fff0ee; }
.system-message-card__delete:focus-visible { outline: 3px solid rgba(161, 67, 63, .2); outline-offset: 2px; }

.system-message-editor { display: grid; gap: 1rem; width: min(100%, 900px); }
.system-message-editor__validation:empty { display: none; }
.system-message-editor__validation { padding: .8rem 1rem; border: 1px solid #efc1bd; border-radius: 12px; color: #8f3535; background: #fff4f2; font-size: .8rem; }
.system-message-editor__card { padding: 1.3rem 1.4rem; }
.system-message-editor__card > header { display: flex; align-items: flex-start; gap: .8rem; margin-bottom: 1rem; }
.system-message-editor__card h2 { margin: 0 0 .2rem; color: var(--message-admin-ink); font-size: 1.08rem; letter-spacing: -.02em; }
.system-message-editor__card header p { margin: 0; color: var(--message-admin-muted); font-size: .8rem; line-height: 1.45; }
.system-message-editor__step { display: grid; place-items: center; width: 2.1rem; height: 2.1rem; flex: 0 0 auto; border-radius: 10px; color: var(--message-admin-brand-dark); background: var(--message-admin-soft); font-size: .72rem; font-weight: 850; }
.system-message-editor__fields { display: grid; gap: .85rem; }
.system-message-editor__fields label { display: grid; gap: .38rem; color: #405a68; font-size: .79rem; font-weight: 750; }
.system-message-editor__fields textarea { min-height: 140px; resize: vertical; }
.system-message-editor__fields small { color: #7a8e97; font-size: .7rem; font-weight: 600; }
.system-message-editor__fields .field-validation-error,
.system-message-editor__field-error { color: #a43f3c; font-size: .7rem; font-weight: 700; }

.system-message-audience-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.system-message-audience-option { position: relative; display: flex; align-items: center; gap: .75rem; min-width: 0; padding: .8rem .85rem; border: 1px solid var(--message-admin-border); border-radius: 13px; background: #fbfdfd; cursor: pointer; transition: border-color .16s ease, background .16s ease, box-shadow .16s ease; }
.system-message-audience-option:hover { border-color: #bad2d8; background: #f5fbfb; }
.system-message-audience-option input { position: absolute; opacity: 0; pointer-events: none; }
.system-message-audience-option__check { display: grid; place-items: center; width: 1.45rem; height: 1.45rem; flex: 0 0 auto; border: 1px solid #b9cbd1; border-radius: 7px; color: transparent; background: #fff; font-size: .75rem; font-weight: 900; transition: color .16s ease, background .16s ease, border-color .16s ease; }
.system-message-audience-option input:checked + .system-message-audience-option__check { border-color: var(--message-admin-brand); color: #fff; background: var(--message-admin-brand); }
.system-message-audience-option:has(input:checked) { border-color: rgba(8, 127, 140, .42); background: var(--message-admin-soft); }
.system-message-audience-option:has(input:focus-visible) { outline: 3px solid rgba(8, 127, 140, .18); outline-offset: 2px; }
.system-message-audience-option > span:last-child { display: grid; min-width: 0; }
.system-message-audience-option strong { color: var(--message-admin-ink); font-size: .8rem; }
.system-message-audience-option small { color: var(--message-admin-muted); font-size: .68rem; }

.system-message-editor__publish { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; }
.system-message-editor__publish > header { margin: 0; }
.system-message-switch { display: flex; align-items: center; gap: .65rem; cursor: pointer; }
.system-message-switch > input { position: absolute; opacity: 0; }
.system-message-switch > span:nth-child(2) { position: relative; width: 2.75rem; height: 1.5rem; flex: 0 0 auto; border-radius: 999px; background: #becbd0; transition: background .18s ease; }
.system-message-switch > span:nth-child(2)::after { position: absolute; top: .2rem; left: .2rem; width: 1.1rem; height: 1.1rem; border-radius: 50%; background: #fff; box-shadow: 0 2px 5px rgba(0, 0, 0, .18); content: ""; transition: transform .18s ease; }
.system-message-switch input:checked + span { background: var(--message-admin-brand); }
.system-message-switch input:checked + span::after { transform: translateX(1.25rem); }
.system-message-switch input:focus-visible + span { outline: 3px solid rgba(8, 127, 140, .2); outline-offset: 2px; }
.system-message-switch > span:last-child { display: grid; }
.system-message-switch strong { color: var(--message-admin-ink); font-size: .78rem; }
.system-message-switch small { color: var(--message-admin-muted); font-size: .66rem; }
.system-message-editor__actions { display: flex; justify-content: flex-end; gap: .6rem; }

@media (max-width: 900px) {
    .system-message-card { grid-template-columns: minmax(0, 1fr); }
    .system-message-card__state { width: fit-content; }
    .system-message-card__actions { justify-content: flex-start; }
}

@media (max-width: 720px) {
    .system-message-stack { width: calc(100% - 1rem); margin-bottom: .65rem; }
    .system-message-banner { padding: .78rem .85rem; border-radius: 12px; }
    .system-message-admin__hero { align-items: stretch; flex-direction: column; }
    .system-message-admin__summary { grid-template-columns: 1fr; }
    .system-message-admin__panel { padding: 1rem; }
    .system-message-admin__panel > header { align-items: flex-start; flex-direction: column; }
    .system-message-audience-grid { grid-template-columns: 1fr; }
    .system-message-editor__card { padding: 1rem; }
    .system-message-editor__publish { grid-template-columns: 1fr; }
    .system-message-editor__actions { flex-direction: column-reverse; }
    .system-message-editor__actions .app-button { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    /* Keep the notice visible without spatial motion. Override the global
       reduced-motion duration reset only for this gentle opacity pulse. */
    .system-message-banner__icon {
        animation: system-message-icon-fade 3s ease-in-out infinite;
        animation-duration: 3s !important;
        animation-iteration-count: infinite !important;
    }

    .system-message-card,
    .system-message-card__delete,
    .system-message-audience-option,
    .system-message-audience-option__check,
    .system-message-switch > span { transition: none; }
}