/**
 * SLS ERP — Liquid Glass header shell (UI UX Pro Max)
 */

:root,
html[data-theme="light"] {
    --sls-header-h: 4.25rem;
    --sls-header-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.82) 0%, rgba(240, 253, 250, 0.72) 48%, rgba(255, 251, 235, 0.65) 100%);
    --sls-header-glass-solid: rgba(255, 255, 255, 0.88);
    --sls-header-border: rgba(13, 148, 136, 0.22);
    --sls-header-glow: rgba(13, 148, 136, 0.28);
    --sls-header-accent-line: linear-gradient(90deg, transparent 0%, #0d9488 18%, #14b8a6 42%, #ca8a04 58%, #0d9488 82%, transparent 100%);
    --sls-header-text: #0f172a;
    --sls-header-text-muted: #64748b;
    --sls-header-crumb-bg: rgba(255, 255, 255, 0.55);
    --sls-header-crumb-border: rgba(148, 163, 184, 0.35);
    --sls-header-crumb-active-bg: linear-gradient(135deg, rgba(13, 148, 136, 0.14), rgba(20, 184, 166, 0.08));
    --sls-header-crumb-active-text: #0f766e;
    --sls-header-crumb-active-border: rgba(13, 148, 136, 0.45);
    --sls-header-icon-bg: rgba(255, 255, 255, 0.72);
    --sls-header-icon-bg-hover: rgba(240, 253, 250, 0.95);
    --sls-header-icon-text: #334155;
    --sls-header-rail-bg: rgba(255, 255, 255, 0.5);
    --sls-header-rail-border: rgba(148, 163, 184, 0.35);
    --sls-header-search-bg: rgba(255, 255, 255, 0.78);
    --sls-header-search-border: rgba(13, 148, 136, 0.28);
    --sls-header-search-focus: rgba(13, 148, 136, 0.35);
    --sls-header-dropdown-bg: rgba(255, 255, 255, 0.96);
    --sls-header-dropdown-border: rgba(226, 232, 240, 0.95);
    --sls-header-shadow: 0 10px 40px rgba(15, 23, 42, 0.1), 0 1px 0 rgba(255, 255, 255, 0.85) inset;
    --sls-theme-track: rgba(226, 232, 240, 0.9);
    --sls-theme-thumb: #ffffff;
    --color-background: #eef2f7;
    --color-card: #ffffff;
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-border: #e2e8f0;
}

html[data-theme="dark"] {
    --sls-header-glass: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 35, 50, 0.88) 50%, rgba(20, 30, 45, 0.9) 100%);
    --sls-header-glass-solid: rgba(15, 23, 42, 0.94);
    --sls-header-border: rgba(51, 65, 85, 0.75);
    --sls-header-glow: rgba(20, 184, 166, 0.35);
    --sls-header-accent-line: linear-gradient(90deg, transparent, #14b8a6 20%, #22c55e 45%, #ca8a04 55%, #14b8a6 80%, transparent);
    --sls-header-text: #f1f5f9;
    --sls-header-text-muted: #94a3b8;
    --sls-header-crumb-bg: rgba(30, 41, 59, 0.65);
    --sls-header-crumb-border: rgba(71, 85, 105, 0.65);
    --sls-header-crumb-active-bg: linear-gradient(135deg, rgba(20, 184, 166, 0.22), rgba(13, 148, 136, 0.12));
    --sls-header-crumb-active-text: #5eead4;
    --sls-header-crumb-active-border: rgba(45, 212, 191, 0.45);
    --sls-header-icon-bg: rgba(30, 41, 59, 0.82);
    --sls-header-icon-bg-hover: rgba(51, 65, 85, 0.95);
    --sls-header-icon-text: #e2e8f0;
    --sls-header-rail-bg: rgba(15, 23, 42, 0.55);
    --sls-header-rail-border: rgba(51, 65, 85, 0.75);
    --sls-header-search-bg: rgba(30, 41, 59, 0.82);
    --sls-header-search-border: rgba(71, 85, 105, 0.75);
    --sls-header-search-focus: rgba(20, 184, 166, 0.35);
    --sls-header-dropdown-bg: rgba(15, 23, 42, 0.98);
    --sls-header-dropdown-border: rgba(51, 65, 85, 0.9);
    --sls-header-shadow: 0 12px 48px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255, 255, 255, 0.06) inset;
    --sls-theme-track: rgba(51, 65, 85, 0.95);
    --sls-theme-thumb: #1e293b;
    --color-background: #0b1220;
    --color-card: #1e293b;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-border: #334155;
}

/* ── Shell ── */
#app-site-header.sls-glass-header {
    position: sticky;
    top: 0;
    z-index: 200000;
    isolation: isolate;
    overflow: visible;
    min-height: var(--sls-header-h);
    padding: 0.55rem 0.75rem;
    padding-top: max(0.55rem, env(safe-area-inset-top, 0px));
    background: var(--sls-header-glass);
    backdrop-filter: blur(22px) saturate(1.45);
    -webkit-backdrop-filter: blur(22px) saturate(1.45);
    border-bottom: 1px solid var(--sls-header-border);
    box-shadow: var(--sls-header-shadow);
    color: var(--sls-header-text);
    transition: background 0.4s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

@media (min-width: 768px) {
    #app-site-header.sls-glass-header {
        padding: 0.65rem 1.25rem;
    }
}

#app-site-header.sls-glass-header::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: var(--sls-header-accent-line);
    background-size: 200% 100%;
    animation: slsHeaderShimmer 8s ease-in-out infinite;
    opacity: 0.9;
    pointer-events: none;
}

#app-site-header.sls-glass-header::after {
    content: "";
    position: absolute;
    inset: auto 15% -28px 15%;
    height: 56px;
    background: radial-gradient(ellipse at center, var(--sls-header-glow) 0%, transparent 72%);
    pointer-events: none;
    z-index: -1;
    filter: blur(16px);
}

@keyframes slsHeaderShimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.sls-header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 28rem) auto;
    align-items: center;
    gap: 0.75rem 1rem;
    width: 100%;
}

@media (max-width: 1023px) {
    .sls-header-inner {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "start actions"
            "search search";
    }
    .sls-header-zone--start { grid-area: start; }
    .sls-header-zone--center { grid-area: search; }
    .sls-header-zone--end { grid-area: actions; }
}

@media (max-width: 767px) {
    .sls-header-inner {
        gap: 0.5rem;
    }
}

.sls-header-zone {
    min-width: 0;
    display: flex;
    align-items: center;
}

.sls-header-zone--start {
    gap: 0.5rem;
}

.sls-header-zone--center {
    justify-content: center;
}

.sls-header-zone--end {
    justify-content: flex-end;
}

/* Breadcrumbs — glass pills */
.sls-header-zone--start .header-breadcrumbs ol {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.35rem;
    min-width: 0;
    overflow: hidden;
}

.sls-header-zone--start .header-breadcrumbs li {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    flex-shrink: 1;
}

.sls-crumb-sep {
    color: var(--sls-header-text-muted);
    font-size: 0.625rem;
    opacity: 0.65;
    flex-shrink: 0;
    margin: 0 0.1rem;
}

.sls-crumb,
.sls-crumb:visited {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    max-width: 100%;
    padding: 0.3rem 0.65rem;
    border-radius: 9999px;
    border: 1px solid var(--sls-header-crumb-border);
    background: var(--sls-header-crumb-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--sls-header-text-muted);
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.18s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.sls-crumb:hover {
    color: var(--sls-header-crumb-active-text);
    border-color: var(--sls-header-crumb-active-border);
    background: var(--sls-header-crumb-active-bg);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(13, 148, 136, 0.12);
}

.sls-crumb--current {
    background: var(--sls-header-crumb-active-bg);
    border-color: var(--sls-header-crumb-active-border);
    color: var(--sls-header-crumb-active-text);
    font-weight: 700;
    box-shadow: 0 2px 10px rgba(13, 148, 136, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.sls-crumb i {
    font-size: 0.75rem;
    opacity: 0.85;
    flex-shrink: 0;
}

.header-breadcrumb-text {
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

@media (min-width: 1280px) {
    .header-breadcrumb-text { max-width: 220px; }
}

/* Search — hero glass pill */
.sls-header-search-shell {
    position: relative;
    width: 100%;
}

.sls-header-search-shell .header-chat-search {
    width: 100%;
    height: 42px;
    border-radius: 9999px;
    border: 1px solid var(--sls-header-search-border);
    background: var(--sls-header-search-bg);
    color: var(--sls-header-text);
    font-size: 0.875rem;
    font-weight: 500;
    padding-top: 0;
    padding-bottom: 0;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, transform 0.2s ease;
}

html[dir="ltr"] .sls-header-search-shell .header-chat-search { padding-left: 2.5rem; padding-right: 4.25rem; }
html[dir="rtl"] .sls-header-search-shell .header-chat-search { padding-right: 2.5rem; padding-left: 4.25rem; }

.sls-header-search-shell .header-chat-search::placeholder {
    color: var(--sls-header-text-muted);
    font-weight: 400;
}

.sls-header-search-shell .header-chat-search:hover {
    border-color: rgba(13, 148, 136, 0.45);
    background: var(--sls-header-glass-solid);
}

.sls-header-search-shell .header-chat-search:focus {
    outline: none;
    border-color: #0d9488;
    box-shadow: 0 0 0 4px var(--sls-header-search-focus), 0 8px 24px rgba(13, 148, 136, 0.15);
    transform: translateY(-1px);
}

html[data-theme="dark"] .sls-header-search-shell .header-chat-search:focus {
    border-color: #14b8a6;
}

.sls-header-search-icon,
.sls-header-search-shell .sls-search-input-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--sls-header-text-muted);
    pointer-events: none;
    font-size: 0.875rem;
    z-index: 1;
}

html[dir="ltr"] .sls-header-search-icon,
html[dir="ltr"] .sls-header-search-shell .sls-search-input-icon { left: 1rem; }
html[dir="rtl"] .sls-header-search-icon,
html[dir="rtl"] .sls-header-search-shell .sls-search-input-icon { right: 1rem; }

.header-global-search-wrap .sls-search-suggestions-panel,
.header-global-search-wrap #header-global-search-suggestions {
    left: 0;
    right: 0;
    width: 100%;
    max-width: min(480px, calc(100vw - 1.5rem));
}

.sls-header-search-kbd {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: none;
    align-items: center;
    padding: 0.15rem 0.45rem;
    border-radius: 6px;
    border: 1px solid var(--sls-header-crumb-border);
    background: var(--sls-header-crumb-bg);
    color: var(--sls-header-text-muted);
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    pointer-events: none;
}

@media (min-width: 768px) {
    .sls-header-search-kbd { display: inline-flex; }
}

html[dir="ltr"] .sls-header-search-kbd { right: 0.75rem; }
html[dir="rtl"] .sls-header-search-kbd { left: 0.75rem; }

/* Academic year selector */
.sls-header-year-shell {
    position: relative;
    display: none;
    align-items: center;
    min-width: 0;
    max-width: 148px;
    height: 36px;
    border-radius: 9999px;
    border: 1px solid var(--sls-header-crumb-border);
    background: var(--sls-header-crumb-bg);
    transition: border-color 0.2s ease, background 0.2s ease;
}

@media (min-width: 768px) {
    .sls-header-year-shell { display: inline-flex; }
}

.sls-header-year-shell:hover {
    border-color: rgba(13, 148, 136, 0.45);
    background: var(--sls-header-glass-solid);
}

.sls-header-year-select {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
    appearance: none;
}

.sls-header-year-display {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0 0.65rem;
    pointer-events: none;
    color: var(--sls-header-text);
    min-width: 0;
}

.sls-header-year-display .fa-calendar-days {
    color: #0d9488;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.sls-header-year-label {
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1.1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 88px;
}

.sls-header-year-chevron {
    font-size: 0.55rem;
    color: var(--sls-header-text-muted);
    flex-shrink: 0;
}

@media (min-width: 1280px) {
    .sls-header-year-shell { max-width: 168px; }
    .sls-header-year-label { max-width: 108px; }
}

/* Action rail */
.sls-header-action-rail {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem;
    border-radius: 9999px;
    border: 1px solid var(--sls-header-rail-border);
    background: var(--sls-header-rail-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
    overflow: visible;
}

@media (max-width: 767px) {
    .sls-header-action-rail {
        gap: 0.2rem;
        padding: 0.2rem;
    }
}

.sls-header-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 9999px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--sls-header-icon-text);
    font-weight: 700;
    font-size: 0.8125rem;
    cursor: pointer;
    text-decoration: none;
    overflow: visible;
    transition: transform 0.18s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.sls-header-icon-btn:hover {
    background: var(--sls-header-icon-bg-hover);
    border-color: var(--sls-header-border);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
}

.sls-header-icon-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--sls-header-search-focus);
}

.sls-header-icon-btn--lang {
    min-width: 2.35rem;
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
    background: linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(202, 138, 4, 0.1));
    border-color: var(--sls-header-border);
}

/* Theme switch */
.sls-theme-switch {
    position: relative;
    width: 3.25rem;
    height: 2rem;
    padding: 0;
    border: 1px solid var(--sls-header-border);
    border-radius: 9999px;
    background: var(--sls-theme-track);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.3s ease, border-color 0.25s ease;
}

.sls-theme-switch:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--sls-header-search-focus);
}

.sls-theme-switch-thumb {
    position: absolute;
    top: 2px;
    width: 1.55rem;
    height: 1.55rem;
    border-radius: 9999px;
    background: var(--sls-theme-thumb);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #ca8a04;
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease, color 0.25s ease;
}

html[dir="ltr"] .sls-theme-switch-thumb { left: 2px; }
html[dir="rtl"] .sls-theme-switch-thumb { right: 2px; }

html[data-theme="light"] .sls-theme-switch-thumb {
    transform: translateX(0);
    color: #64748b;
}

html[data-theme="light"] .sls-theme-switch .sls-theme-icon-light { display: none; }
html[data-theme="light"] .sls-theme-switch .sls-theme-icon-dark { display: block; }

html[data-theme="dark"] .sls-theme-switch-thumb {
    color: #fbbf24;
}

html[dir="ltr"][data-theme="dark"] .sls-theme-switch-thumb {
    transform: translateX(1.25rem);
}

html[dir="rtl"][data-theme="dark"] .sls-theme-switch-thumb {
    transform: translateX(-1.25rem);
}

html[data-theme="dark"] .sls-theme-switch .sls-theme-icon-dark { display: none; }
html[data-theme="dark"] .sls-theme-switch .sls-theme-icon-light { display: block; }

#header-user-toggle.sls-header-avatar-btn {
    width: auto;
    height: auto;
    padding: 2px;
    border-radius: 9999px;
    border: none;
    background: linear-gradient(135deg, #0d9488, #ca8a04);
    box-shadow: 0 2px 10px rgba(13, 148, 136, 0.25);
    cursor: pointer;
}

#header-user-toggle.sls-header-avatar-btn img {
    width: 2.15rem;
    height: 2.15rem;
    border-radius: 9999px;
    border: 2px solid var(--sls-header-glass-solid);
    object-fit: cover;
}

#header-user-toggle.sls-header-avatar-btn:hover {
    transform: translateY(-1px) scale(1.02);
}

/* Dropdowns */
#app-site-header .header-dropdown {
    background: var(--sls-header-dropdown-bg);
    border: 1px solid var(--sls-header-dropdown-border);
    backdrop-filter: blur(18px) saturate(1.25);
    -webkit-backdrop-filter: blur(18px) saturate(1.25);
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
    border-radius: 1rem;
}

#app-site-header #header-noti-dropdown {
    background: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

html[data-theme="dark"] #app-site-header #header-noti-dropdown {
    background: #0f172a;
}

html[data-theme="dark"] #app-site-header .header-dropdown {
    box-shadow: 0 24px 56px rgba(0, 0, 0, 0.5);
}

html[data-theme="dark"] #header-noti-dropdown .text-slate-800,
html[data-theme="dark"] #header-noti-dropdown .font-black,
html[data-theme="dark"] #header-user-dropdown .text-slate-900 {
    color: #f1f5f9 !important;
}

html[data-theme="dark"] #header-noti-dropdown .text-slate-500,
html[data-theme="dark"] #header-user-dropdown .text-slate-500 {
    color: #94a3b8 !important;
}

html[data-theme="dark"] #header-noti-dropdown .border-slate-100,
html[data-theme="dark"] #header-user-dropdown .border-slate-100,
html[data-theme="dark"] #header-global-search-dropdown .divide-slate-100 > * {
    border-color: #334155 !important;
}

html[data-theme="dark"] #header-noti-dropdown .bg-slate-50,
html[data-theme="dark"] #header-noti-student-tabs,
html[data-theme="dark"] #header-noti-filters,
html[data-theme="dark"] #header-noti-dropdown .header-noti-footer {
    background: #0f172a !important;
}

html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.bg-white,
html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.noti-row-read {
    background-color: #0f172a !important;
    box-shadow: none !important;
}

html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.bg-teal-50,
html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.noti-row-unread {
    background-color: rgba(20, 184, 166, 0.14) !important;
}

html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row:hover,
html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.hover\:bg-slate-50:hover {
    background-color: #1e293b !important;
}

html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.bg-teal-50:hover,
html[data-theme="dark"] #header-noti-dropdown .noti-dropdown-row.noti-row-unread:hover {
    background-color: rgba(20, 184, 166, 0.22) !important;
}

html[data-theme="dark"] :is(#notification-list, #full-notification-list) .noti-date-heading {
    color: #94a3b8 !important;
    background: #0f172a !important;
    border-bottom-color: #334155 !important;
}

html[data-theme="dark"] #header-noti-dropdown .bell-module-pill:not(.is-active),
html[data-theme="dark"] #header-noti-dropdown .bell-evt-pill:not(.is-active),
html[data-theme="dark"] .bell-student-pill:not(.is-active) {
    background: #1e293b !important;
    border-color: #475569 !important;
    color: #cbd5e1 !important;
}

html[data-theme="dark"] #header-noti-dropdown .bell-module-pill:not(.is-active):hover,
html[data-theme="dark"] #header-noti-dropdown .bell-evt-pill:not(.is-active):hover {
    background: #334155 !important;
    border-color: #64748b !important;
    color: #f1f5f9 !important;
}

html[data-theme="dark"] #header-noti-dropdown .noti-menu-toggle {
    background: #1e293b !important;
    border-color: #475569 !important;
    color: #cbd5e1 !important;
}

html[data-theme="dark"] #header-noti-dropdown #mark-all-read:hover,
html[data-theme="dark"] #header-noti-dropdown #header-noti-see-all:hover {
    background: rgba(20, 184, 166, 0.12) !important;
}

html[data-theme="dark"] .bell-student-pill {
    background: #1e293b !important;
    border-color: #475569 !important;
    color: #cbd5e1 !important;
}

/* Facebook-style notification action badge + change list */
.sls-noti-count-badge {
    position: absolute;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 11px;
    font-weight: 800;
    line-height: 1;
    color: #fff;
    background: #e11d48;
    border: 2px solid var(--sls-header-glass-solid, #f1f5f9);
    border-radius: 9999px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.2);
    top: 0;
    right: 0;
    bottom: auto;
    left: auto;
    transform: translate(30%, -30%);
    z-index: 6;
    pointer-events: none;
}
html[dir="rtl"] .sls-noti-count-badge {
    right: auto;
    left: 0;
    transform: translate(-30%, -30%);
}
/* Header friend-requests dropdown */
#app-site-header #header-friends-dropdown,
#header-friends-dropdown {
    width: min(23rem, calc(100vw - 2rem));
    padding: 0;
    overflow: hidden;
    background: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.sls-hfr-dropdown .hidden {
    display: none !important;
}
.sls-hfr-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid #f1f5f9;
}
.sls-hfr-title {
    font-size: 1.05rem;
    font-weight: 900;
    color: #1e293b;
}
.sls-hfr-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    height: 1.5rem;
    padding: 0 0.45rem;
    border-radius: 9999px;
    background: #ffe4e6;
    color: #e11d48;
    font-size: 0.75rem;
    font-weight: 800;
}
.sls-hfr-list {
    max-height: min(26rem, calc(100vh - 12rem));
    overflow-y: auto;
    padding: 0.35rem;
}
.sls-hfr-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem;
    border-radius: 0.75rem;
    transition: background 0.15s ease, opacity 0.2s ease;
}
.sls-hfr-item:hover {
    background: #f8fafc;
}
.sls-hfr-item.is-declined {
    opacity: 0.6;
}
.sls-hfr-avatar {
    flex-shrink: 0;
    display: block;
    width: 3rem;
    height: 3rem;
    border-radius: 9999px;
    overflow: hidden;
    box-shadow: 0 0 0 2px #ffffff, 0 1px 4px rgba(15, 23, 42, 0.15);
}
.sls-hfr-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.sls-hfr-body {
    flex: 1 1 auto;
    min-width: 0;
}
.sls-hfr-name {
    display: block;
    font-size: 0.875rem;
    font-weight: 800;
    color: #0f172a;
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sls-hfr-name:hover {
    text-decoration: underline;
}
.sls-hfr-sub {
    margin-top: 0.1rem;
    font-size: 0.72rem;
    color: #64748b;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sls-hfr-actions {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.45rem;
}
.sls-hfr-btn {
    flex: 1 1 0;
    padding: 0.4rem 0.6rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.78rem;
    font-weight: 800;
    cursor: pointer;
    transition: background 0.15s ease, opacity 0.15s ease;
}
.sls-hfr-btn:disabled {
    opacity: 0.55;
    cursor: wait;
}
.sls-hfr-btn--primary {
    background: #1877f2;
    color: #ffffff;
}
.sls-hfr-btn--primary:hover:not(:disabled) {
    background: #166fe5;
}
.sls-hfr-btn--muted {
    background: #e4e6eb;
    color: #1e293b;
}
.sls-hfr-btn--muted:hover:not(:disabled) {
    background: #d8dadf;
}
.sls-hfr-done {
    margin-top: 0.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #64748b;
}
.sls-hfr-item.is-accepted .sls-hfr-done {
    color: #0d9488;
}
.sls-hfr-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.75rem 1rem;
    font-size: 0.85rem;
    color: #64748b;
    text-align: center;
}
.sls-hfr-empty i {
    font-size: 1.6rem;
    color: #cbd5e1;
}
.sls-hfr-footer {
    display: block;
    padding: 0.65rem 1rem;
    border-top: 1px solid #f1f5f9;
    background: #f8fafc;
    text-align: center;
    font-size: 0.875rem;
    font-weight: 800;
    color: #0d9488;
    text-decoration: none;
}
.sls-hfr-footer:hover {
    background: #f0fdfa;
    text-decoration: underline;
}
html[data-theme="dark"] #app-site-header #header-friends-dropdown,
html[data-theme="dark"] #header-friends-dropdown {
    background: #0f172a;
}
html[data-theme="dark"] .sls-hfr-head,
html[data-theme="dark"] .sls-hfr-footer {
    border-color: #334155;
}
html[data-theme="dark"] .sls-hfr-title,
html[data-theme="dark"] .sls-hfr-name {
    color: #f1f5f9;
}
html[data-theme="dark"] .sls-hfr-sub,
html[data-theme="dark"] .sls-hfr-done,
html[data-theme="dark"] .sls-hfr-empty {
    color: #94a3b8;
}
html[data-theme="dark"] .sls-hfr-item:hover {
    background: #1e293b;
}
html[data-theme="dark"] .sls-hfr-avatar {
    box-shadow: 0 0 0 2px #0f172a, 0 1px 4px rgba(0, 0, 0, 0.4);
}
html[data-theme="dark"] .sls-hfr-btn--muted {
    background: #334155;
    color: #e2e8f0;
}
html[data-theme="dark"] .sls-hfr-btn--muted:hover:not(:disabled) {
    background: #475569;
}
html[data-theme="dark"] .sls-hfr-footer {
    background: #0f172a;
}
html[data-theme="dark"] .sls-hfr-footer:hover {
    background: rgba(20, 184, 166, 0.12);
}
html[data-theme="dark"] .sls-hfr-count {
    background: rgba(225, 29, 72, 0.2);
    color: #fda4af;
}

/* All header badges must sit on the same side, otherwise adjacent badges collide in RTL. */
html[dir="rtl"] #header-friends-badge,
html[dir="rtl"] #header-rooms-badge,
html[dir="rtl"] #header-messenger-badge {
    right: auto;
    left: 0;
    transform: translate(-25%, -25%);
}
#header-noti-toggle.sls-header-icon-btn,
#header-maintenance-toggle.sls-header-icon-btn {
    overflow: visible;
}
.sls-noti-count-badge.hidden {
    display: none !important;
}
.sls-noti-avatar {
    position: relative;
    width: 3rem;
    height: 3rem;
    flex-shrink: 0;
}
.sls-noti-avatar-badge {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 9999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 9px;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.25);
    bottom: -2px;
    right: -2px;
    left: auto;
    top: auto;
    z-index: 2;
}
html[dir="rtl"] .sls-noti-avatar-badge {
    right: auto;
    left: -2px;
}
.sls-noti-tone-emerald { background: #059669; }
.sls-noti-tone-blue { background: #1877f2; }
.sls-noti-tone-rose { background: #e11d48; }
.sls-noti-tone-indigo { background: #4f46e5; }
.sls-noti-tone-amber { background: #d97706; }
.sls-noti-tone-violet { background: #7c3aed; }
.sls-noti-tone-teal { background: #0d9488; }
.sls-noti-tone-sky { background: #0284c7; }
.sls-noti-tone-slate { background: #475569; }
.sls-noti-unread-dot {
    width: 12px;
    height: 12px;
    border-radius: 9999px;
    background: #1877f2;
    box-shadow: 0 0 0 2px #fff;
}
.sls-noti-changes {
    margin: 0.4rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.2rem 1.25rem;
}
.sls-noti-changes li {
    display: flex;
    flex-wrap: nowrap;
    align-items: baseline;
    gap: 0.35rem;
    min-width: 0;
    font-size: 12px;
    line-height: 1.35;
    color: #475569;
}
.sls-noti-change-field {
    font-weight: 700;
    color: #334155;
    flex-shrink: 0;
}
.sls-noti-change-field::after { content: ':'; }
.sls-noti-change-from {
    color: #94a3b8;
    text-decoration: line-through;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sls-noti-change-to {
    color: #0f172a;
    font-weight: 600;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sls-noti-change-arrow { color: #94a3b8; font-size: 11px; }
html[dir="rtl"] .sls-noti-change-arrow { transform: scaleX(-1); }
.sls-noti-changes.is-collapsed > .sls-noti-change-extra {
    display: none;
}
.sls-noti-more-btn {
    display: inline-flex;
    align-items: center;
    position: relative;
    z-index: 20;
    margin-top: 0.35rem;
    padding: 0;
    border: 0;
    background: none;
    color: #2563eb;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.35;
    cursor: pointer;
    font-family: inherit;
}
.sls-noti-more-btn:hover {
    text-decoration: underline;
}
.sls-noti-day-seq {
    display: inline-block;
    margin-inline-end: 0.35rem;
    font-variant-numeric: tabular-nums;
    unicode-bidi: isolate;
}
.sls-noti-day-seq:empty {
    display: none;
}
.sls-noti-time-text {
    font-variant-numeric: tabular-nums;
    unicode-bidi: isolate;
}
.sls-noti-changes:not(.is-collapsed) li {
    flex-wrap: wrap;
}
.sls-noti-changes:not(.is-collapsed) .sls-noti-change-from,
.sls-noti-changes:not(.is-collapsed) .sls-noti-change-to {
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
}

#notification-list {
    scrollbar-width: none;
    -ms-overflow-style: none;
}
#notification-list::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
}

html[data-theme="dark"] #header-noti-badge,
html[data-theme="dark"] #header-messenger-badge,
html[data-theme="dark"] #header-rooms-badge,
html[data-theme="dark"] .sls-noti-count-badge {
    border-color: #1e293b !important;
}

html[data-theme="dark"] .sls-noti-avatar-badge {
    border-color: #1e293b !important;
}

html[data-theme="dark"] .sls-noti-changes li {
    color: #cbd5e1;
}

html[data-theme="dark"] .sls-noti-change-field,
html[data-theme="dark"] .sls-noti-change-to {
    color: #e2e8f0;
}

html[data-theme="dark"] .sls-noti-change-from,
html[data-theme="dark"] .sls-noti-change-arrow {
    color: #94a3b8;
}
html[data-theme="dark"] .sls-noti-more-btn {
    color: #60a5fa;
}

html[data-theme="dark"] .sls-noti-unread-dot {
    box-shadow: 0 0 0 2px #0f172a;
}

#toast-container {
    position: fixed !important;
    top: auto !important;
    bottom: max(1.25rem, calc(env(safe-area-inset-bottom, 0px) + 4.75rem)) !important;
    z-index: 2147483646 !important;
    display: flex !important;
    flex-direction: column;
    justify-content: flex-end;
    gap: 0.5rem;
    width: min(22.5rem, calc(100vw - 2rem));
    pointer-events: none;
}
html[dir="ltr"] #toast-container {
    right: max(1rem, env(safe-area-inset-right, 0px)) !important;
    left: auto !important;
    align-items: flex-end;
}
html[dir="rtl"] #toast-container {
    left: max(1rem, env(safe-area-inset-left, 0px)) !important;
    right: auto !important;
    align-items: flex-start;
}

/* App shell backgrounds */
html[data-theme="light"] body.bg-slate-100 {
    background: linear-gradient(165deg, #eef2f7 0%, #f8fafc 45%, #f1f5f9 100%) !important;
}

html[data-theme="dark"] body.bg-slate-100,
html[data-theme="dark"] #main-content > main.bg-slate-100 {
    background-color: var(--color-background) !important;
}

html[data-theme="dark"] body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
}

html[data-theme="dark"] #main-content .bg-white {
    background-color: var(--color-card) !important;
}

html[data-theme="dark"] .text-slate-700,
html[data-theme="dark"] .text-slate-800,
html[data-theme="dark"] .text-slate-900 {
    color: #e2e8f0;
}

html[data-theme="dark"] .text-slate-500,
html[data-theme="dark"] .text-slate-600 {
    color: #94a3b8;
}

html[data-theme="dark"] .border-slate-200,
html[data-theme="dark"] .border-slate-100 {
    border-color: #334155;
}

html[data-theme="dark"] .bg-slate-50 {
    background-color: #1e293b !important;
}

html[data-theme="dark"] .bg-slate-100:not(#sidebar) {
    background-color: #0b1220 !important;
}

html[data-theme="dark"] #header-sidebar-toggle {
    color: var(--sls-header-icon-text) !important;
}

html[data-theme="dark"] #header-sidebar-toggle:hover {
    background: var(--sls-header-icon-bg-hover) !important;
}

.sls-sidebar-toggle-btn {
    flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
    #app-site-header.sls-glass-header::before { animation: none; }
    .sls-crumb, .sls-header-icon-btn, .sls-theme-switch-thumb,
    .sls-header-search-shell .header-chat-search { transition: none; }
}