/**
 * Thông báo site — card fixed góc dưới, tối đa 300px.
 */
.site-announce {
    --sa-info: #38bdf8;
    --sa-success: #34d399;
    --sa-warning: #fbbf24;
    --sa-danger: #f87171;
    --sa-accent: var(--sa-info);
    --sa-bg: rgba(15, 23, 42, 0.92);
    --sa-text: #e2e8f0;
    --sa-muted: #94a3b8;
    --sa-border: rgba(148, 163, 184, 0.22);
    --sa-btn: rgba(255, 255, 255, 0.08);
    box-sizing: border-box;
    position: fixed;
    left: auto;
    right: 1rem;
    bottom: 5.5rem;
    z-index: 1040;
    width: min(var(--sa-max-width, 300px), calc(100vw - 2rem));
    max-width: var(--sa-max-width, 300px);
    margin: 0;
    border: 1px solid var(--sa-border);
    border-radius: 14px;
    background: var(--sa-bg);
    color: var(--sa-text);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 16px 40px -12px rgba(0, 0, 0, 0.55), inset 3px 0 0 var(--sa-accent);
    transform: translate3d(120%, 16px, 0);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease;
}

.site-announce--hidden,
.site-announce[hidden] {
    display: none !important;
}

.site-announce.is-in {
    transform: translate3d(0, 0, 0);
    opacity: 1;
    pointer-events: auto;
}

.site-announce.is-out {
    transform: translate3d(20%, 24px, 0);
    opacity: 0;
    pointer-events: none;
}

.site-announce--left {
    left: 1rem;
    right: auto;
    transform: translate3d(-120%, 16px, 0);
}

.site-announce--left.is-in {
    transform: translate3d(0, 0, 0);
}

.site-announce--left.is-out {
    transform: translate3d(-20%, 24px, 0);
}

@media (min-width: 768px) {
    .site-announce {
        right: 5.5rem;
        bottom: 1.25rem;
    }

    .site-announce--left {
        left: 1.25rem;
        right: auto;
    }
}

.site-announce--info { --sa-accent: var(--sa-info); }
.site-announce--success { --sa-accent: var(--sa-success); }
.site-announce--warning { --sa-accent: var(--sa-warning); }
.site-announce--danger { --sa-accent: var(--sa-danger); }

.site-announce__inner {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    padding: 0.8rem 0.75rem 0.7rem;
}

.site-announce__body {
    flex: 1;
    min-width: 0;
}

.site-announce__title {
    display: block;
    font-weight: 650;
    font-size: 0.875rem;
    line-height: 1.35;
    color: var(--sa-text);
}

.site-announce__text {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--sa-muted);
}

.site-announce__link {
    display: inline-block;
    margin-top: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--sa-accent);
    text-decoration: none;
}

.site-announce__link:hover {
    text-decoration: underline;
}

.site-announce__tools {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
    flex-shrink: 0;
}

.site-announce__count {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--sa-muted);
    letter-spacing: 0.02em;
}

.site-announce__btn {
    width: 1.6rem;
    height: 1.6rem;
    border: 0;
    border-radius: 8px;
    background: var(--sa-btn);
    color: var(--sa-text);
    cursor: pointer;
    font-size: 0.95rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.site-announce__btn:hover {
    filter: brightness(1.15);
}

.site-announce--single .site-announce__nav {
    display: none;
}

.site-announce__nav {
    display: flex;
    align-items: center;
    gap: 0.1rem;
}

.site-announce__swap {
    animation: sa-swap 0.32s ease;
}

@keyframes sa-swap {
    0% { opacity: 0; transform: translateY(8px); }
    100% { opacity: 1; transform: translateY(0); }
}

.site-announce__progress {
    display: block;
    height: 2px;
    width: 100%;
    transform-origin: left center;
    background: var(--sa-accent);
    border-radius: 0 0 14px 14px;
    animation-name: sa-progress;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
}

.site-announce.is-paused .site-announce__progress {
    animation-play-state: paused;
}

.site-announce--single:not(.site-announce--auto) .site-announce__progress {
    display: none;
}

@keyframes sa-progress {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

html[data-theme="light"] .site-announce,
.site-announce--on-light {
    --sa-info: #0284c7;
    --sa-success: #059669;
    --sa-warning: #d97706;
    --sa-danger: #dc2626;
    --sa-bg: rgba(255, 255, 255, 0.96);
    --sa-text: #0f172a;
    --sa-muted: #475569;
    --sa-border: #e2e8f0;
    --sa-btn: #f1f5f9;
    box-shadow: 0 12px 32px -10px rgba(15, 23, 42, 0.2), inset 3px 0 0 var(--sa-accent);
}