/* ==========================================================================
   community.css — Community feed at /community
   Loaded by public/community/index.php
   ========================================================================== */

.cf-wrap {
    background: var(--color-bg);
    min-height: 60vh;
    padding: 28px 0 60px;
}
.cf-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 16px;
}
.cf-container--grid {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr) 300px;
    gap: 24px;
    align-items: flex-start;
}
.cf-main { min-width: 0; }

/* ── Left rail (quick nav) ─────────────────────────────── */
.cf-rail {
    position: sticky;
    top: 88px;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
    padding: 4px 4px 4px 0;
}
.cf-rail::-webkit-scrollbar { width: 4px; }
.cf-rail::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 99px; }

/* Rail header (hidden on desktop, visible inside mobile drawer) */
.cf-rail-header {
    display: none;
    align-items: center;
    gap: 11px;
    padding: 0 4px 14px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--color-line);
}
.cf-rail-header__mark {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 15px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px -4px color-mix(in srgb, var(--color-primary) 55%, transparent);
}
.cf-rail-header__title {
    font-size: 14.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    line-height: 1.2;
}
.cf-rail-header__sub {
    font-size: 11.5px;
    color: var(--color-mute2);
    font-weight: var(--fw-bold);
    margin-top: 1px;
}

.cf-rail-nav {
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.cf-rail-item {
    position: relative;
    display: flex; align-items: center; gap: 11px;
    padding: 8px 11px;
    color: var(--color-secondary-text);
    text-decoration: none;
    border-radius: 10px;
    font-size: 13.5px;
    font-weight: var(--fw-bold);
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.cf-rail-item:hover {
    background: color-mix(in srgb, var(--color-primary) 7%, var(--color-bg));
    color: var(--color-ink);
}
.cf-rail-item.is-active {
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
}
.cf-rail-item.is-active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 18px;
    border-radius: 0 3px 3px 0;
    background: var(--color-primary);
}
.cf-rail-icon {
    width: 26px; height: 26px;
    border-radius: 8px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
    transition: transform var(--dur-fast) var(--ease);
}
.cf-rail-item:hover .cf-rail-icon { transform: scale(1.08); }
.cf-rail-divider {
    border: 0;
    border-top: 1px solid var(--color-line);
    margin: 12px 8px 6px;
}
.cf-rail-section-label {
    font-size: 10px;
    font-weight: var(--fw-extrabold);
    color: var(--color-mute2);
    text-transform: uppercase;
    letter-spacing: .1em;
    padding: 4px 12px 6px;
}

.cf-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 88px;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    padding-right: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}
.cf-side::-webkit-scrollbar { width: 5px; }
.cf-side::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 99px; }
.cf-side::-webkit-scrollbar-track { background: transparent; }

/* ── Composer (FB-style 2-row card) ──────────────────────── */
.cf-composer {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    margin-bottom: 14px;
    padding: 14px 16px 10px;
    transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.cf-composer:hover {
    border-color: color-mix(in srgb, var(--color-primary) 28%, var(--color-border));
    box-shadow: 0 4px 14px -8px rgba(15,23,42,.12);
}

/* Top row: avatar + prompt pill */
.cf-composer__row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.cf-composer__avatar-wrap {
    background: none;
    border: 0;
    padding: 2px;
    cursor: pointer;
    flex-shrink: 0;
    border-radius: 50%;
    transition: box-shadow var(--dur-fast) var(--ease);
}
.cf-composer__avatar-wrap:hover {
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 28%, transparent);
}
.cf-composer__avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-line);
    display: block;
}
.cf-composer__prompt {
    flex: 1;
    min-width: 0;
    padding: 11px 18px;
    background: var(--color-bg);
    border: 1px solid transparent;
    border-radius: 999px;
    text-align: left;
    color: var(--color-muted);
    font-size: 14.5px;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
    min-height: 44px;
}
.cf-composer__prompt:hover {
    background: var(--color-primary-soft);
    border-color: color-mix(in srgb, var(--color-primary) 24%, transparent);
    color: var(--color-primary-hover, var(--color-primary));
}
.cf-composer__prompt-text {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Divider giữa prompt và actions (FB-pattern) */
.cf-composer__divider {
    height: 1px;
    background: var(--color-line);
    margin: 12px -4px 8px;
}

/* Bottom row: 3 type buttons evenly distributed */
.cf-composer__actions {
    display: flex;
    gap: 4px;
}
.cf-composer__type-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 12px;
    background: transparent;
    border: 0;
    border-radius: 10px;
    font-size: 13.5px;
    font-weight: 700;
    color: var(--color-secondary-text);
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
    min-height: 42px;
}
.cf-composer__type-btn i {
    font-size: 16px;
    transition: transform var(--dur-fast) var(--ease);
}
.cf-composer__type-btn:hover {
    background: var(--color-bg);
    transform: translateY(-1px);
}
.cf-composer__type-btn:hover i {
    transform: scale(1.1);
}
.cf-composer__type-btn:active {
    transform: translateY(0);
}

/* Per-type accent colors (icon + hover bg) */
.cf-composer__type-btn--text i      { color: var(--color-primary); }
.cf-composer__type-btn--text:hover  { background: var(--color-primary-soft); color: var(--color-primary-hover, var(--color-primary)); }

.cf-composer__type-btn--vocab i     { color: var(--color-secondary); }
.cf-composer__type-btn--vocab:hover { background: var(--color-secondary-soft); color: var(--color-secondary-hover, var(--color-secondary)); }

.cf-composer__type-btn--shadow i    { color: var(--color-warning); }
.cf-composer__type-btn--shadow:hover{ background: var(--color-warning-soft); color: var(--color-warning-deep, var(--color-warning)); }

/* Composer modal */
.cf-composer-modal { width: min(540px, 100%); }
.cf-composer-step { animation: cfStepIn .2s var(--ease); }
@keyframes cfStepIn {
    from { opacity: 0; transform: translateX(8px); }
    to   { opacity: 1; transform: none; }
}
.cf-composer-back {
    background: transparent;
    border: 0;
    color: var(--color-muted);
    font-size: 12.5px;
    font-weight: var(--fw-bold);
    cursor: pointer;
    padding: 6px 0 10px;
    display: inline-flex; align-items: center; gap: 6px;
}
.cf-composer-back:hover { color: var(--color-primary); }

.cf-composer-type-grid {
    display: flex; flex-direction: column;
    gap: 10px;
    margin-top: 18px;
}
.cf-composer-type-card {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: 14px;
    cursor: pointer;
    text-align: left;
    transition: all var(--dur-fast) var(--ease);
}
.cf-composer-type-card:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    transform: translateY(-1px);
}
.cf-composer-type-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}
.cf-composer-type-info { flex: 1; }
.cf-composer-type-name {
    font-size: 14.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
}
.cf-composer-type-count {
    font-size: 12px;
    color: var(--color-muted);
    margin-top: 3px;
}
.cf-composer-arrow {
    color: var(--color-mute2);
    font-size: 11px;
    transition: transform var(--dur-fast) var(--ease);
}
.cf-composer-type-card:hover .cf-composer-arrow {
    color: var(--color-primary);
    transform: translateX(3px);
}

.cf-composer-empty-hint {
    margin-top: 16px;
    padding: 10px 14px;
    background: color-mix(in srgb, var(--color-accent-soft) 70%, var(--color-surface));
    border: 1px solid color-mix(in srgb, var(--color-accent) 18%, transparent);
    border-radius: 10px;
    font-size: 12px;
    color: var(--color-secondary-text);
    display: flex; align-items: center; gap: 8px;
    flex-wrap: wrap;
}
.cf-composer-empty-hint i { color: var(--color-accent); flex-shrink: 0; }
.cf-composer-empty-hint a {
    color: var(--color-primary);
    font-weight: var(--fw-bold);
    text-decoration: none;
}
.cf-composer-empty-hint a:hover { text-decoration: underline; }

/* Picker list */
.cf-composer-list {
    display: flex; flex-direction: column; gap: 6px;
    max-height: 380px;
    overflow-y: auto;
    margin: 12px -8px 0;
    padding: 0 8px;
}
.cf-composer-list::-webkit-scrollbar { width: 5px; }
.cf-composer-list::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 99px; }
.cf-composer-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: 10px;
    cursor: pointer;
    text-align: left;
    width: 100%;
    transition: all var(--dur-fast) var(--ease);
}
.cf-composer-item:hover:not(.is-disabled) {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}
.cf-composer-item.is-disabled {
    opacity: .55;
    cursor: not-allowed;
}
.cf-composer-item__cover {
    flex-shrink: 0;
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--color-secondary-soft), var(--color-primary-soft));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
}
.cf-composer-item__thumb {
    flex-shrink: 0;
    position: relative;
    width: 64px; aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--color-primary-soft), var(--color-accent-soft));
    border-radius: 8px;
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.cf-composer-item__thumb img { width: 100%; height: 100%; object-fit: cover; }
.cf-composer-item__thumb > i { font-size: 16px; color: var(--color-primary); }
.cf-composer-item__body { flex: 1; min-width: 0; }
.cf-composer-item__name {
    display: block;
    font-size: 13.5px;
    font-weight: var(--fw-bold);
    color: var(--color-ink);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.cf-composer-item__meta {
    display: block;
    font-size: 11.5px;
    color: var(--color-muted);
    margin-top: 3px;
}
.cf-composer-vis {
    font-weight: var(--fw-bold);
}
.cf-composer-vis--public   { color: var(--color-secondary-hover); }
.cf-composer-vis--unlisted { color: var(--color-warning); }
.cf-composer-vis--private  { color: var(--color-mute2); }

.cf-composer-empty {
    text-align: center;
    padding: 32px 16px;
    color: var(--color-muted);
}
.cf-composer-empty i { font-size: 28px; opacity: .35; display: block; margin-bottom: 12px; }
.cf-composer-empty p { margin: 0 0 14px; font-size: 13px; }

/* Confirm step */
.cf-composer-confirm-card {
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: 12px;
    padding: 14px 16px;
    margin: 16px 0;
}
.cf-composer-confirm-title {
    font-size: 14.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    margin-bottom: 6px;
}
.cf-composer-confirm-current {
    font-size: 12.5px;
    color: var(--color-muted);
    display: flex; align-items: center; gap: 6px;
}
.cf-composer-confirm-current strong { color: var(--color-secondary-hover); }

.cf-composer-confirm-info {
    display: flex; gap: 10px; align-items: flex-start;
    padding: 12px 14px;
    background: color-mix(in srgb, var(--color-accent-soft) 70%, var(--color-surface));
    border: 1px solid color-mix(in srgb, var(--color-accent) 18%, transparent);
    border-radius: 10px;
    font-size: 12.5px;
    color: var(--color-secondary-text);
    line-height: 1.55;
    margin-bottom: 16px;
}
.cf-composer-confirm-info > i { color: var(--color-accent); margin-top: 3px; flex-shrink: 0; }
.cf-composer-confirm-info strong { color: var(--color-ink); display: block; margin-bottom: 4px; }
.cf-composer-confirm-info ul { margin: 6px 0 0; padding-left: 18px; }
.cf-composer-confirm-info li { margin-bottom: 3px; }

/* ── Search bar ─────────────────────────────────────────── */
.cf-search {
    position: relative;
    display: flex; align-items: center;
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: 999px;
    margin-bottom: 14px;
    padding: 4px 4px 4px 16px;
    transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.cf-search:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 14%, transparent);
}
.cf-search__icon {
    color: var(--color-mute2);
    font-size: 14px;
    flex-shrink: 0;
}
.cf-search__input {
    flex: 1;
    border: 0;
    padding: 11px 10px;
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-ink);
    background: transparent;
    min-width: 0;
}
.cf-search__input:focus { outline: none; }
.cf-search__input::placeholder { color: var(--color-mute2); }
.cf-search__clear {
    width: 28px; height: 28px;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--color-mute2);
    text-decoration: none;
    border-radius: 50%;
    transition: background var(--dur-fast), color var(--dur-fast);
    flex-shrink: 0;
}
.cf-search__clear:hover { background: var(--color-line); color: var(--color-ink); }
.cf-search__btn {
    padding: 8px 18px;
    background: var(--color-primary);
    color: #fff;
    border: 0;
    border-radius: 999px;
    font-size: 13px;
    font-weight: var(--fw-bold);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--dur-fast);
}
.cf-search__btn:hover { background: var(--color-primary-hover); }
.cf-search-result-info {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 12px;
    padding: 0 2px;
}
.cf-search-result-info strong { color: var(--color-ink); }

/* ── Personalization hint banner ───────────────────────── */
.cf-personalize-hint {
    display: flex; gap: 10px; align-items: flex-start;
    padding: 12px 14px;
    background: linear-gradient(135deg, var(--color-accent-soft) 0%, var(--color-primary-soft) 100%);
    border: 1px solid color-mix(in srgb, var(--color-accent) 22%, transparent);
    border-radius: 12px;
    margin-bottom: 14px;
    font-size: 13px;
    color: var(--color-secondary-text);
    line-height: 1.55;
}
.cf-personalize-hint > i {
    color: var(--color-accent);
    margin-top: 3px;
    flex-shrink: 0;
    font-size: 15px;
}
.cf-personalize-hint strong { color: var(--color-ink); }
.cf-personalize-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--fw-bold);
    margin-left: 6px;
}
.cf-personalize-link:hover { text-decoration: underline; }

/* ── Right sidebar cards ───────────────────────────────── */
.cf-side-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 16px 16px 14px;
}
.cf-side-card__title {
    font-size: 13.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    margin: 0 0 12px;
    display: flex; align-items: center; gap: 8px;
    letter-spacing: -.1px;
}
.cf-side-card__title i {
    color: var(--color-primary);
    font-size: 13px;
}

/* CEFR suggestions card — accent-tinted variant */
.cf-side-card--cefr {
    background: linear-gradient(180deg, color-mix(in srgb, var(--color-accent) 6%, var(--color-surface)) 0%, var(--color-surface) 80%);
    border-color: color-mix(in srgb, var(--color-accent) 28%, var(--color-border));
}
.cf-side-card--cefr .cf-side-card__title i { color: var(--color-accent); }
.cf-cefr-tag {
    display: inline-flex;
    padding: 2px 8px;
    margin-left: 4px;
    background: var(--color-accent);
    color: #fff;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .04em;
}
.cf-side-pill--cefr {
    background: var(--color-accent-soft);
    color: var(--color-accent-hover, var(--color-accent));
}
.cf-side-card__cta {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    color: var(--color-primary);
    font-size: 12.5px;
    font-weight: 700;
    text-decoration: none;
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-side-card__cta:hover {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
}
.cf-side-card__cta i { font-size: 11px; }

/* Trending grid */
.cf-trending-grid {
    display: flex; flex-wrap: wrap;
    gap: 6px;
}
.cf-trending-chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 11px;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: 999px;
    color: var(--color-secondary-text);
    text-decoration: none;
    font-size: 12px;
    font-weight: var(--fw-bold);
    transition: all var(--dur-fast) var(--ease);
}
.cf-trending-chip:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.cf-trending-chip__count {
    background: var(--color-line);
    color: var(--color-muted);
    padding: 1px 7px;
    border-radius: 999px;
    font-size: 10.5px;
    font-weight: var(--fw-extrabold);
}
.cf-trending-chip:hover .cf-trending-chip__count {
    background: var(--color-primary);
    color: #fff;
}

/* Side list (top sets/videos) */
.cf-side-list {
    list-style: none;
    margin: 0; padding: 0;
    display: flex; flex-direction: column;
    gap: 4px;
}
.cf-side-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px;
    text-decoration: none;
    color: inherit;
    border-radius: 10px;
    transition: background var(--dur-fast) var(--ease);
}
.cf-side-item:hover { background: var(--color-bg); }
.cf-side-item__rank {
    flex-shrink: 0;
    width: 22px;
    font-size: 16px;
    font-weight: var(--fw-extrabold);
    color: var(--color-mute2);
    text-align: center;
    font-variant-numeric: tabular-nums;
}
.cf-side-item:hover .cf-side-item__rank { color: var(--color-primary); }
.cf-side-item__cover {
    flex-shrink: 0;
    width: 38px; height: 38px;
    background: linear-gradient(135deg, var(--color-secondary-soft), var(--color-primary-soft));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px;
}
.cf-side-item__thumb {
    flex-shrink: 0;
    position: relative;
    width: 62px; aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--color-primary-soft), var(--color-accent-soft));
    border-radius: 8px;
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.cf-side-item__thumb img { width: 100%; height: 100%; object-fit: cover; }
.cf-side-item__thumb > i { font-size: 16px; color: var(--color-primary); }
.cf-side-item__dur {
    position: absolute;
    bottom: 2px; right: 2px;
    background: rgba(15,23,42,.85);
    color: #fff;
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: var(--fw-bold);
}
.cf-side-item__body { flex: 1; min-width: 0; }
.cf-side-item__title {
    display: block;
    font-size: 12.5px;
    font-weight: var(--fw-bold);
    color: var(--color-ink);
    line-height: 1.3;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    margin-bottom: 3px;
}
.cf-side-item:hover .cf-side-item__title { color: var(--color-primary); }
.cf-side-item__meta {
    display: flex; align-items: center; gap: 6px;
    font-size: 10.5px;
    color: var(--color-mute2);
    font-weight: var(--fw-bold);
}
.cf-side-item__meta i { font-size: 9px; margin-right: 2px; }
.cf-side-pill {
    padding: 1px 6px;
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
    border-radius: 4px;
    font-size: 10px;
}

/* Active learners */
.cf-side-list--users { gap: 2px; }
.cf-side-user {
    display: flex; align-items: center; gap: 10px;
    padding: 8px;
    text-decoration: none;
    color: inherit;
    border-radius: 10px;
    transition: background var(--dur-fast) var(--ease);
}
.cf-side-user:hover { background: var(--color-bg); }
.cf-side-user__avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-line);
    flex-shrink: 0;
}
.cf-side-user__info { flex: 1; min-width: 0; }
.cf-side-user__name {
    display: block;
    font-size: 13px;
    font-weight: var(--fw-bold);
    color: var(--color-ink);
    margin-bottom: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.cf-side-user:hover .cf-side-user__name { color: var(--color-primary); }
.cf-side-user__meta {
    display: block;
    font-size: 11px;
    color: var(--color-muted);
}

/* CTA card */
.cf-side-cta {
    background: linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-accent-soft) 100%);
    border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
    border-radius: 16px;
    padding: 18px 16px;
    text-align: center;
}
.cf-side-cta > i {
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: 8px;
    display: block;
}
.cf-side-cta h4 {
    font-size: 13.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    margin: 0 0 4px;
}
.cf-side-cta p {
    font-size: 12px;
    color: var(--color-muted);
    line-height: 1.5;
    margin: 0 0 12px;
}

/* ── Header ────────────────────────────────────────────── */
.cf-head { margin-bottom: 20px; }
.cf-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-ink);
    margin: 0 0 4px;
    letter-spacing: -0.5px;
}
.cf-subtitle {
    font-size: 14px;
    color: var(--color-muted);
    margin: 0;
}

/* ── Tabs ──────────────────────────────────────────────── */
.cf-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 18px;
    padding-bottom: 2px;
    overflow-x: auto;
    scrollbar-width: none;
    border-bottom: 1px solid var(--color-line);
}
.cf-tabs::-webkit-scrollbar { display: none; }
.cf-tab {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 10px 14px 11px;
    font-size: 13.5px;
    font-weight: var(--fw-bold);
    color: var(--color-muted);
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-tab:hover { color: var(--color-ink); }
.cf-tab.is-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.cf-tab i { font-size: 11px; }
.cf-tab-count {
    background: var(--color-line);
    color: var(--color-muted);
    padding: 1px 8px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: var(--fw-extrabold);
    margin-left: 2px;
}
.cf-tab.is-active .cf-tab-count {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

/* ── Feed ──────────────────────────────────────────────── */
.cf-feed {
    display: flex; flex-direction: column;
    gap: 16px;
}

.cf-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    overflow: hidden;
    transition: border-color var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.cf-card:hover {
    border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border));
    box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

/* Card head */
.cf-card__head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 18px 10px;
    gap: 12px;
}
.cf-author {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none;
    color: inherit;
    flex: 1; min-width: 0;
}
.cf-author__avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-line);
    flex-shrink: 0;
}
/* Placeholder avatar khi không tìm thấy author */
.cf-author__avatar--placeholder {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-soft), var(--color-secondary-soft));
    color: var(--color-primary);
    font-size: 16px;
}
.cf-author--unknown { cursor: default; }
.cf-author--unknown:hover .cf-author__name { color: var(--color-ink); }
.cf-author__meta { min-width: 0; }
.cf-author__name {
    font-size: 14px;
    font-weight: var(--fw-bold);
    color: var(--color-ink);
    line-height: 1.2;
}
.cf-author:hover .cf-author__name { color: var(--color-primary); }
.cf-author__sub {
    font-size: 12px;
    color: var(--color-muted);
    margin-top: 2px;
}

.cf-card__type-badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: var(--fw-extrabold);
    text-transform: uppercase;
    letter-spacing: .04em;
    white-space: nowrap;
    flex-shrink: 0;
}
.cf-card__type-badge--vocab {
    background: var(--color-secondary-soft);
    color: var(--color-secondary-hover);
}
.cf-card__type-badge--shadow {
    background: var(--color-warning-soft);
    color: var(--color-warning-deep);
}
.cf-card__type-badge i { font-size: 10px; }

/* ── 3-dot menu (per-card actions) ─────────────────────── */
.cf-card__menu-wrap {
    position: relative;
    flex-shrink: 0;
}
.cf-card__menu-btn {
    width: 32px; height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: transparent;
    border: 0;
    color: var(--color-mute2);
    cursor: pointer;
    font-size: 14px;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.cf-card__menu-btn:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}
.cf-card__menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 220px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 14px 36px -12px rgba(15,23,42,.22);
    padding: 6px;
    z-index: 40;
    animation: cf-menu-in .16s var(--ease);
}
.cf-card__menu[hidden] { display: none; }
@keyframes cf-menu-in {
    from { opacity: 0; transform: translateY(-4px) scale(.98); }
    to   { opacity: 1; transform: none; }
}
.cf-menu-item {
    display: flex; align-items: center; gap: 10px;
    width: 100%;
    padding: 9px 12px;
    background: transparent;
    border: 0;
    border-radius: 8px;
    color: var(--color-text);
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.cf-menu-item i {
    width: 18px;
    text-align: center;
    font-size: 13px;
    color: var(--color-muted);
}
.cf-menu-item:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}
.cf-menu-item:hover i { color: var(--color-primary); }
.cf-menu-item--danger { color: var(--color-warning-deep); }
.cf-menu-item--danger i { color: var(--color-warning); }
.cf-menu-item--danger:hover {
    background: var(--color-warning-soft);
    color: var(--color-warning-deep);
}
.cf-menu-item--danger:hover i { color: var(--color-warning-deep); }
.cf-menu-item--admin i { color: var(--color-accent); }
.cf-menu-divider {
    height: 1px;
    background: var(--color-line);
    margin: 4px 8px;
}

/* ── Share button in action row (replaces report icon) ── */
.cf-act--share:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ── Danger button variant ─────────────────────────────── */
.cf-btn--danger {
    background: var(--color-warning);
    color: #fff;
    border: 0;
}
.cf-btn--danger:hover:not(:disabled) {
    background: var(--color-warning-deep);
    color: #fff;
}
.cf-btn--danger:disabled {
    opacity: .6;
    cursor: not-allowed;
}

/* Card body */
.cf-card__body {
    display: flex; gap: 16px;
    padding: 8px 20px 16px;
    text-decoration: none;
    color: inherit;
    align-items: flex-start;
}

/* Vocab cover — Coursera-style: FA icon trắng trên gradient + word count + CEFR badge */
.cf-vocab-cover {
    width: 116px; height: 116px;
    flex-shrink: 0;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 6px 18px -8px rgba(15,23,42,.22);
    transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
    isolation: isolate;
}
.cf-vocab-cover::before {
    content: '';
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 25% 20%, rgba(255,255,255,.32) 0%, transparent 55%),
        radial-gradient(circle at 80% 110%, rgba(15,23,42,.18) 0%, transparent 55%);
    pointer-events: none;
}
.cf-vocab-cover::after {
    content: '';
    position: absolute; inset: 0;
    background-image: linear-gradient(135deg, rgba(255,255,255,.05) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.05) 50%, rgba(255,255,255,.05) 75%, transparent 75%);
    background-size: 8px 8px;
    opacity: .35;
    pointer-events: none;
}
.cf-vocab-cover > i {
    font-size: 38px;
    color: rgba(255,255,255,.95);
    filter: drop-shadow(0 2px 4px rgba(15,23,42,.22));
    z-index: 1;
    transition: transform var(--dur-base) var(--ease);
}
.cf-vocab-cover__count {
    position: absolute;
    bottom: 8px; left: 10px;
    display: inline-flex; align-items: baseline; gap: 3px;
    color: rgba(255,255,255,.96);
    line-height: 1;
    z-index: 2;
    text-shadow: 0 1px 2px rgba(15,23,42,.28);
}
.cf-vocab-cover__count strong { font-size: 18px; font-weight: 800; letter-spacing: -.3px; }
.cf-vocab-cover__count small { font-size: 10.5px; font-weight: 700; opacity: .85; text-transform: uppercase; letter-spacing: .04em; }
.cf-vocab-cover__cefr {
    position: absolute;
    top: 8px; right: 8px;
    padding: 3px 8px;
    background: rgba(255,255,255,.22);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: #fff;
    border-radius: 999px;
    font-size: 10.5px;
    font-weight: 800;
    letter-spacing: .04em;
    border: 1px solid rgba(255,255,255,.28);
    z-index: 2;
}

/* CEFR themes — gradient riêng cho A · B · C */
.cf-vocab-cover--a { background: linear-gradient(135deg, #10B981 0%, #14B8A6 60%, #0EA5E9 100%); }
.cf-vocab-cover--b { background: linear-gradient(135deg, #14B8A6 0%, #06B6D4 55%, #2563EB 100%); }
.cf-vocab-cover--c { background: linear-gradient(135deg, #06B6D4 0%, #6366F1 55%, #7C3AED 100%); }

.cf-card:hover .cf-vocab-cover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -10px rgba(15,23,42,.28);
}
.cf-card:hover .cf-vocab-cover > i { transform: scale(1.05); }

/* Shadow thumbnail — bigger + zoom on hover */
.cf-shadow-thumb {
    position: relative;
    width: 220px;
    aspect-ratio: 16/9;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--color-primary-soft), var(--color-accent-soft));
    border-radius: 14px;
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 14px -8px rgba(15,23,42,.18);
}
.cf-shadow-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .35s var(--ease);
}
.cf-card:hover .cf-shadow-thumb img { transform: scale(1.05); }
.cf-shadow-thumb::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(15,23,42,.45) 100%);
    opacity: 0;
    transition: opacity var(--dur-base) var(--ease);
    z-index: 1;
}
.cf-card:hover .cf-shadow-thumb::before { opacity: 1; }
.cf-shadow-thumb > i {
    font-size: 32px;
    color: var(--color-primary);
}
.cf-shadow-dur {
    position: absolute; bottom: 8px; right: 8px;
    background: rgba(15, 23, 42, .88);
    color: #fff;
    padding: 3px 9px;
    border-radius: 6px;
    font-size: 11.5px;
    font-weight: 700;
    backdrop-filter: blur(4px);
    z-index: 2;
}
.cf-shadow-ted {
    position: absolute; top: 8px; left: 8px;
    background: var(--color-warning);
    color: #fff;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .05em;
    box-shadow: 0 2px 6px rgba(0,0,0,.18);
    z-index: 2;
}

.cf-card__main { flex: 1; min-width: 0; }
.cf-card__title {
    font-size: 17px;
    font-weight: 800;
    color: var(--color-ink);
    margin: 0 0 6px;
    line-height: 1.3;
    letter-spacing: -.2px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--dur-fast) var(--ease);
}
.cf-card:hover .cf-card__title { color: var(--color-primary); }
.cf-card__desc {
    font-size: 13.5px;
    color: var(--color-secondary-text);
    line-height: 1.5;
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
/* Word preview chips (5 từ đầu tiên của vocab set) */
.cf-word-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 10px 0 8px;
}
.cf-word-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 11px;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    color: var(--color-ink);
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 600;
    font-family: var(--font-sans);
    letter-spacing: -.1px;
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-card:hover .cf-word-chip {
    background: color-mix(in srgb, var(--color-primary) 6%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-primary) 22%, var(--color-line));
}
.cf-word-chip--more {
    background: transparent;
    border-style: dashed;
    color: var(--color-muted);
    font-weight: 700;
}

.cf-card__pills {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin-top: 6px;
}
.cf-pill {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    color: var(--color-secondary-text);
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 700;
    line-height: 1.2;
}
.cf-pill i { font-size: 10px; opacity: .85; }
.cf-pill--cefr {
    background: var(--color-primary-soft);
    border-color: color-mix(in srgb, var(--color-primary) 24%, transparent);
    color: var(--color-primary-hover, var(--color-primary));
}
.cf-pill--topic {
    background: var(--color-accent-soft);
    border-color: color-mix(in srgb, var(--color-accent) 22%, transparent);
    color: var(--color-accent-hover, var(--color-accent));
}

/* Card footer */
.cf-card__foot {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 18px 14px;
    gap: 12px;
    flex-wrap: wrap;
    border-top: 1px solid var(--color-line);
}
.cf-card__stats {
    display: flex;
    gap: 6px;
    font-size: 12.5px;
    color: var(--color-secondary-text);
    font-weight: 600;
    align-items: center;
}
.cf-card__stats > span,
.cf-card__stats .cf-stat-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 8px;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.cf-card__stats > span:hover,
.cf-card__stats .cf-stat-toggle:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}
.cf-card__stats i {
    font-size: 12px;
    margin-right: 1px;
    color: var(--color-mute2);
}

.cf-card__actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
/* Action button: pill (icon + bg subtle on hover) */
.cf-act {
    width: 38px; height: 38px;
    border: 0;
    background: var(--color-bg);
    border-radius: 999px;
    color: var(--color-secondary-text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
    font-size: 14px;
}
.cf-act:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    transform: translateY(-1px);
}
.cf-act--like.is-active {
    color: #fff;
    background: var(--color-warning);
}
.cf-act--like.is-active:hover {
    background: var(--color-warning-deep, var(--color-warning));
    color: #fff;
}
.cf-act--save.is-active {
    color: #fff;
    background: var(--color-primary);
}
.cf-act--save.is-active:hover {
    background: var(--color-primary-hover);
    color: #fff;
}
.cf-act--share:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.cf-act-login {
    font-size: 12.5px;
    color: var(--color-primary-hover, var(--color-primary));
    text-decoration: none;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--color-primary-soft);
    border: 1px solid color-mix(in srgb, var(--color-primary) 28%, transparent);
    border-radius: 999px;
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.cf-act-login:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    transform: translateY(-1px);
}
.cf-act-login i { font-size: 12px; }

.cf-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: #fff;
    border-radius: 12px;
    font-size: 13.5px;
    font-weight: 800;
    text-decoration: none;
    transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), filter var(--dur-fast) var(--ease);
    margin-left: auto;
    box-shadow: 0 4px 12px -4px color-mix(in srgb, var(--color-primary) 40%, transparent);
    min-height: 42px;
}
.cf-cta:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 18px -6px color-mix(in srgb, var(--color-primary) 45%, transparent);
    filter: brightness(1.04);
}
.cf-cta:active { transform: translateY(0); }
.cf-cta i {
    font-size: 11px;
    transition: transform var(--dur-fast) var(--ease);
}
.cf-cta:hover i { transform: translateX(3px); }

/* ── Comments thread ───────────────────────────────────── */
.cf-stat-toggle {
    background: transparent;
    border: 0;
    padding: 0;
    cursor: pointer;
    color: var(--color-mute2);
    font-size: 12px;
    font-weight: var(--fw-bold);
    display: inline-flex; align-items: center;
    gap: 4px;
    transition: color var(--dur-fast) var(--ease);
}
.cf-stat-toggle:hover { color: var(--color-primary); }
.cf-stat-toggle i { font-size: 11px; }

.cf-act--comment.is-active { color: var(--color-accent); border-color: var(--color-accent); }

/* ── Inline 2-comment preview (FB-style bubbles) ──────── */
.cf-preview-comments {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 4px 18px 14px;
    border-top: 1px solid var(--color-line);
    background: linear-gradient(180deg, var(--color-bg) 0%, transparent 100%);
}
.cf-preview-comments[hidden] { display: none; }
.cf-pc {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    padding-top: 8px;
}
.cf-pc__avatar-link {
    flex-shrink: 0;
    text-decoration: none;
}
.cf-pc__avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-line);
}
.cf-pc__bubble {
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: 14px;
    padding: 8px 12px;
    min-width: 0;
    flex: 1;
    line-height: 1.4;
}
.cf-pc__name {
    display: inline-block;
    font-size: 12.5px;
    font-weight: 800;
    color: var(--color-ink);
    text-decoration: none;
    margin-bottom: 1px;
}
.cf-pc__name:hover { color: var(--color-primary); }
.cf-pc__body {
    font-size: 13px;
    color: var(--color-text);
    word-break: break-word;
}
.cf-pc__time {
    font-size: 11px;
    color: var(--color-mute2);
    margin-top: 3px;
    font-weight: 600;
}
.cf-preview-more {
    background: transparent;
    border: 0;
    color: var(--color-primary);
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    text-align: left;
    padding: 4px 0 0 40px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: max-content;
}
.cf-preview-more:hover { color: var(--color-primary-hover); text-decoration: underline; }
.cf-preview-more i { font-size: 11.5px; }

.cf-comments {
    border-top: 1px solid var(--color-line);
    padding: 14px 18px 16px;
    background: var(--color-bg);
}
.cf-comments__loading,
.cf-comments__empty {
    text-align: center;
    color: var(--color-muted);
    font-size: 13px;
    padding: 16px 8px;
}
.cf-comments__loading i { margin-right: 6px; }
.cf-comments__list {
    display: flex; flex-direction: column;
    gap: 10px;
    margin-bottom: 12px;
}
.cf-comments__more {
    background: transparent; border: 0;
    color: var(--color-primary);
    font-size: 12.5px; font-weight: var(--fw-bold);
    cursor: pointer;
    padding: 6px 0;
    margin-bottom: 10px;
}
.cf-comments__more:hover { text-decoration: underline; }

.cf-comment {
    display: flex; gap: 8px;
}
.cf-comment__avatar-link {
    flex-shrink: 0;
    text-decoration: none;
}
.cf-comment__avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-line);
}
.cf-comment__body {
    flex: 1; min-width: 0;
    display: flex; flex-direction: column;
    gap: 4px;
}
.cf-comment__bubble {
    background: var(--color-surface);
    padding: 8px 12px;
    border-radius: 14px;
    border: 1px solid var(--color-line);
    max-width: fit-content;
    word-break: break-word;
}
.cf-comment__name {
    font-size: 12.5px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    text-decoration: none;
    display: block;
    line-height: 1.2;
    margin-bottom: 3px;
}
.cf-comment__name:hover { color: var(--color-primary); }
.cf-comment__text {
    font-size: 13px;
    color: var(--color-secondary-text);
    line-height: 1.45;
}
.cf-comment__meta {
    display: flex; gap: 10px;
    font-size: 11px;
    color: var(--color-mute2);
    padding-left: 4px;
}
.cf-comment__del {
    background: transparent; border: 0; padding: 0;
    color: var(--color-mute2);
    font-size: 11px;
    cursor: pointer;
}
.cf-comment__del:hover { color: var(--color-warning); }

/* Comment form */
.cf-comment-form {
    display: flex; gap: 8px; align-items: flex-start;
    margin-top: 8px;
}
.cf-comment-form__avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--color-line);
}
.cf-comment-form__input-wrap {
    flex: 1;
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    padding: 4px 4px 4px 12px;
    transition: border-color var(--dur-fast) var(--ease);
    display: flex; align-items: flex-end;
    gap: 6px;
}
.cf-comment-form__input-wrap:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 14%, transparent);
}
.cf-comment-form__input {
    flex: 1;
    border: 0;
    background: transparent;
    padding: 8px 0;
    font-size: 13.5px;
    font-family: var(--font-sans);
    color: var(--color-ink);
    resize: none;
    line-height: 1.45;
    max-height: 120px;
    overflow-y: auto;
}
.cf-comment-form__input:focus { outline: none; }
.cf-comment-form__input::placeholder { color: var(--color-mute2); }
.cf-comment-form__btn {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    border: 0;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
    transition: background var(--dur-fast) var(--ease);
}
.cf-comment-form__btn:hover:not(:disabled) { background: var(--color-primary-hover); }
.cf-comment-form__btn:disabled { opacity: .5; cursor: not-allowed; }

.cf-comment-login {
    text-align: center;
    color: var(--color-muted);
    font-size: 13px;
    padding: 12px 0 4px;
}
.cf-comment-login a {
    color: var(--color-primary);
    font-weight: var(--fw-bold);
    text-decoration: none;
}
.cf-comment-login a:hover { text-decoration: underline; }

/* Stats row: split into 4 columns when comment toggle present */
.cf-card__stats {
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .cf-comments { padding: 12px 14px 14px; }
    .cf-comment__avatar { width: 28px; height: 28px; }
    .cf-comment__text { font-size: 12.5px; }
    .cf-comment-form__avatar { width: 28px; height: 28px; }
    .cf-comment-form__input { font-size: 13px; }
}

/* ── Text post card ────────────────────────────────────── */
.cf-card--text .cf-card__type-badge--text {
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
}
.cf-card__text-body {
    padding: 4px 20px 16px;
    position: relative;
}
.cf-text-content {
    color: var(--color-ink);
    margin: 0;
    word-break: break-word;
    white-space: pre-wrap;
    font-family: var(--font-sans);
}

/* Adaptive font — minimal style cho normal background */
.cf-text-content--short {
    font-size: 22px;
    line-height: 1.4;
    font-weight: 600;
    letter-spacing: -.3px;
    color: var(--color-ink);
    padding: 4px 0;
}
.cf-text-content--medium {
    font-size: 16px;
    line-height: 1.55;
    font-weight: 500;
    color: var(--color-text);
}
.cf-text-content--long {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text);
}

/* Colored background variant (Facebook-style short post) — căn giữa chuẩn */
.cf-card__text-body--bg {
    padding: 0;                        /* card body không padding, gradient ăn full width */
    margin: 0;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.cf-card__text-body--bg .cf-text-content {
    padding: 36px 32px;
    margin: 0;
    width: 100%;
    text-align: center;
    text-wrap: balance;                /* cân lines khi text dài; câu ngắn vẫn 1 dòng */
    white-space: normal;               /* override pre-wrap để indent template không đẩy text lệch */
    color: #fff;
    font-size: 26px;
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: -.3px;
    text-shadow: 0 2px 8px rgba(15,23,42,.22);
    word-break: break-word;
    box-sizing: border-box;
}

/* 8 background gradient themes */
.cf-bg-teal    { background: linear-gradient(135deg, #14B8A6 0%, #06B6D4 100%); }
.cf-bg-sky     { background: linear-gradient(135deg, #0EA5E9 0%, #6366F1 100%); }
.cf-bg-sunset  { background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%); }
.cf-bg-violet  { background: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%); }
.cf-bg-grass   { background: linear-gradient(135deg, #10B981 0%, #84CC16 100%); }
.cf-bg-rose    { background: linear-gradient(135deg, #F43F5E 0%, #C026D3 100%); }
.cf-bg-night   { background: linear-gradient(135deg, #1E293B 0%, #475569 100%); }
.cf-bg-clouds  { background: linear-gradient(135deg, #94A3B8 0%, #CBD5E1 100%); color: var(--color-ink); }
.cf-card__text-body--bg.cf-bg-clouds .cf-text-content {
    color: var(--color-ink);
    text-shadow: 0 1px 2px rgba(255,255,255,.5);
}

.cf-text-expand,
.cf-text-collapse {
    background: transparent; border: 0; padding: 0;
    color: var(--color-primary);
    font-size: 13.5px;
    font-weight: 700;
    cursor: pointer;
    margin-left: 4px;
}
.cf-card__text-body--bg .cf-text-expand,
.cf-card__text-body--bg .cf-text-collapse {
    color: rgba(255,255,255,.95);
    text-decoration: underline;
}
.cf-text-expand:hover,
.cf-text-collapse:hover { text-decoration: underline; }

@media (max-width: 640px) {
    .cf-card__text-body { padding: 4px 16px 14px; }
    .cf-text-content--short { font-size: 18px; }
    .cf-text-content--medium { font-size: 15.5px; }
    .cf-text-content--long { font-size: 14.5px; }
    .cf-card__text-body--bg { min-height: 180px; padding: 0; }
    .cf-card__text-body--bg .cf-text-content { padding: 28px 22px; font-size: 21px; line-height: 1.4; max-width: 100%; }
}

/* ── Composer background picker (8 swatches) ───────────────── */
.cf-bg-picker {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: 12px;
    margin-top: 10px;
    overflow-x: auto;
    scrollbar-width: none;
}
.cf-bg-picker::-webkit-scrollbar { display: none; }
.cf-bg-picker[hidden] { display: none; }
.cf-bg-picker__label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-muted);
    white-space: nowrap;
    flex-shrink: 0;
}
.cf-bg-picker__label i { font-size: 11px; color: var(--color-primary); }
.cf-bg-picker__list {
    display: flex;
    gap: 8px;
    flex: 1;
}
.cf-bg-swatch {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border: 2px solid transparent;
    border-radius: 50%;
    padding: 2px;
    background: transparent;
    cursor: pointer;
    transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-bg-swatch:hover { transform: scale(1.1); }
.cf-bg-swatch.is-active {
    border-color: var(--color-ink);
    transform: scale(1.05);
}
.cf-bg-swatch__inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(15,23,42,.18);
}
.cf-bg-none {
    background: var(--color-surface);
    border: 1.5px dashed var(--color-line);
    color: var(--color-mute2);
    font-size: 12px;
}

/* Live preview của bg trong composer input area */
.cf-text-post-input[data-bg]:not([data-bg="none"]) {
    border-radius: 14px;
    overflow: hidden;
    transition: background .25s var(--ease);
}
.cf-text-post-input[data-bg="teal"]   { background: linear-gradient(135deg, #14B8A6 0%, #06B6D4 100%); }
.cf-text-post-input[data-bg="sky"]    { background: linear-gradient(135deg, #0EA5E9 0%, #6366F1 100%); }
.cf-text-post-input[data-bg="sunset"] { background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%); }
.cf-text-post-input[data-bg="violet"] { background: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%); }
.cf-text-post-input[data-bg="grass"]  { background: linear-gradient(135deg, #10B981 0%, #84CC16 100%); }
.cf-text-post-input[data-bg="rose"]   { background: linear-gradient(135deg, #F43F5E 0%, #C026D3 100%); }
.cf-text-post-input[data-bg="night"]  { background: linear-gradient(135deg, #1E293B 0%, #475569 100%); }
.cf-text-post-input[data-bg="clouds"] { background: linear-gradient(135deg, #94A3B8 0%, #CBD5E1 100%); }
.cf-text-post-input[data-bg]:not([data-bg="none"]) textarea {
    background: transparent;
    color: #fff;
    font-size: 22px;
    font-weight: 600;
    text-align: center;
    text-shadow: 0 2px 8px rgba(15,23,42,.22);
    min-height: 200px;
    padding: 32px 24px;
    line-height: 1.4;
}
.cf-text-post-input[data-bg="clouds"] textarea {
    color: var(--color-ink);
    text-shadow: 0 1px 2px rgba(255,255,255,.5);
}
.cf-text-post-input[data-bg]:not([data-bg="none"]) textarea::placeholder {
    color: rgba(255,255,255,.78);
}
.cf-text-post-input[data-bg="clouds"] textarea::placeholder {
    color: var(--color-muted);
}

/* ── Text post composer ────────────────────────────────── */

/* Header with icon + title */
.cf-text-post-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 4px 0 14px;
}
.cf-text-post-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg,
        var(--color-primary-soft),
        color-mix(in srgb, var(--color-accent) 22%, var(--color-primary-soft)));
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: 0 1px 0 color-mix(in srgb, var(--color-primary) 14%, transparent);
}

/* Quick prompts row */
.cf-text-post-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}
.cf-prompt-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 11px;
    border-radius: 999px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 12px;
    font-weight: var(--fw-bold);
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease),
                border-color var(--dur-fast) var(--ease),
                color var(--dur-fast) var(--ease),
                transform var(--dur-fast) var(--ease);
}
.cf-prompt-chip i {
    color: var(--color-primary);
    font-size: 11px;
}
.cf-prompt-chip:hover {
    background: var(--color-primary-soft);
    border-color: color-mix(in srgb, var(--color-primary) 50%, transparent);
    color: var(--color-primary-hover);
    transform: translateY(-1px);
}
.cf-prompt-chip:active { transform: translateY(0); }

/* Input wrapper + progress bar */
.cf-text-post-input {
    position: relative;
}
.cf-text-post-progress {
    height: 4px;
    background: var(--color-line);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 8px;
    pointer-events: none;
}
.cf-text-post-progress > span {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: width var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
    border-radius: inherit;
}
.cf-text-post-progress > span.is-warn {
    background: linear-gradient(90deg, var(--color-secondary), var(--color-warning));
}
.cf-text-post-progress > span.is-over {
    background: var(--color-warning);
}

.cf-text-post-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: 12px;
    font-family: var(--font-sans);
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--color-ink);
    background: var(--color-bg);
    resize: vertical;
    min-height: 140px;
    transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.cf-text-post-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 14%, transparent);
}
.cf-text-post-meta {
    display: flex; justify-content: space-between; align-items: center;
    gap: 12px; flex-wrap: wrap;
    margin-top: 8px;
    font-size: 11.5px;
    color: var(--color-muted);
}
.cf-text-post-counter {
    font-variant-numeric: tabular-nums;
    font-weight: var(--fw-bold);
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    color: var(--color-muted);
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-text-post-counter.is-warn {
    background: color-mix(in srgb, var(--color-warning) 12%, var(--color-surface));
    color: var(--color-warning-deep);
    border-color: color-mix(in srgb, var(--color-warning) 32%, transparent);
}
.cf-text-post-counter.is-over {
    background: var(--color-warning-soft);
    color: var(--color-warning-deep);
    border-color: var(--color-warning);
    font-weight: 800;
}
.cf-text-post-rules {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 3px 9px;
    background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
    color: var(--color-accent-hover, var(--color-accent));
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--color-accent) 24%, transparent);
    font-weight: var(--fw-bold);
    font-size: 11px;
}
.cf-text-post-rules i { color: var(--color-accent); font-size: 10.5px; }

/* Policy banner — short reminder beneath rule row */
.cf-text-post-policy {
    display: flex; align-items: flex-start; gap: 8px;
    margin-top: 10px;
    padding: 9px 12px;
    background: var(--color-bg);
    border: 1px dashed var(--color-line);
    border-radius: 10px;
    color: var(--color-muted);
    font-size: 12px;
    line-height: 1.45;
}
.cf-text-post-policy i {
    color: var(--color-mute2);
    margin-top: 2px;
    font-size: 12px;
}
.cf-text-post-error {
    margin-top: 10px;
    padding: 10px 12px;
    background: var(--color-warning-soft);
    border: 1px solid color-mix(in srgb, var(--color-warning) 30%, transparent);
    border-radius: 8px;
    color: var(--color-warning-deep);
    font-size: 13px;
    font-weight: var(--fw-bold);
}

/* ── Empty state ───────────────────────────────────────── */
.cf-empty {
    background: var(--color-surface);
    border: 1.5px dashed var(--color-border);
    border-radius: 18px;
    padding: 48px 24px;
    text-align: center;
    color: var(--color-muted);
}
.cf-empty > i {
    font-size: 36px;
    opacity: .35;
    margin-bottom: 14px;
    display: block;
}
.cf-empty-title {
    font-size: 15px;
    font-weight: var(--fw-extrabold);
    color: var(--color-locked-deep);
    margin: 0 0 6px;
}
.cf-empty-sub {
    font-size: 13px;
    margin: 0 0 18px;
}
.cf-empty-actions {
    display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
}

/* ── Pagination ────────────────────────────────────────── */
.cf-pagination {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 28px; gap: 14px;
}
.cf-page-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 16px;
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    color: var(--color-secondary-text);
    text-decoration: none;
    font-size: 13px;
    font-weight: var(--fw-bold);
    transition: all var(--dur-fast) var(--ease);
}
.cf-page-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.cf-page-info {
    font-size: 13px;
    color: var(--color-muted);
    font-weight: var(--fw-bold);
}

/* ── Buttons (shared) ──────────────────────────────────── */
.cf-btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 13.5px;
    font-weight: var(--fw-bold);
    text-decoration: none;
    border: 0;
    cursor: pointer;
    transition: all var(--dur-fast) var(--ease);
}
.cf-btn--primary { background: var(--color-primary); color: #fff; }
.cf-btn--primary:hover:not(:disabled) { background: var(--color-primary-hover); color: #fff; }
.cf-btn--primary:disabled { opacity: .6; cursor: not-allowed; }
.cf-btn--ghost {
    background: transparent; color: var(--color-secondary-text);
    border: 1.5px solid var(--color-border);
}
.cf-btn--ghost:hover { background: var(--color-line); }

/* ── Modal (Report) ────────────────────────────────────── */
.cf-modal[hidden] { display: none !important; }
.cf-modal {
    position: fixed; inset: 0;
    z-index: 9000;
    display: flex; align-items: center; justify-content: center;
    padding: 16px;
}
.cf-modal__overlay {
    position: absolute; inset: 0;
    background: rgba(15, 23, 42, .55);
    backdrop-filter: blur(3px);
}
.cf-modal__card {
    position: relative;
    background: var(--color-surface);
    border-radius: 18px;
    width: min(480px, 100%);
    max-height: calc(100vh - 32px);
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: 26px 24px 22px;
    box-shadow: 0 24px 60px -12px rgba(15,23,42,.3);
    animation: cfModalIn .22s var(--ease);
}
@keyframes cfModalIn {
    from { opacity: 0; transform: scale(.96) translateY(8px); }
    to   { opacity: 1; transform: none; }
}
.cf-modal__close {
    position: absolute; top: 14px; right: 14px;
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--color-bg); border: 1px solid var(--color-line);
    color: var(--color-muted);
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-size: 13px;
}
.cf-modal__close:hover { background: var(--color-line); color: var(--color-ink); }
.cf-modal__title {
    font-size: 17px;
    font-weight: var(--fw-extrabold);
    color: var(--color-ink);
    margin: 0 0 6px;
    padding-right: 36px;
}
.cf-modal__sub {
    font-size: 13px; color: var(--color-muted);
    margin: 0 0 18px;
}
.cf-modal__sub strong { color: var(--color-ink); }
.cf-form-group { margin-bottom: 14px; }
.cf-form-label {
    display: block;
    font-size: 12px;
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--color-muted);
    margin-bottom: 8px;
}
.cf-radio-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
}
.cf-radio {
    padding: 9px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-size: 13px;
    color: var(--color-secondary-text);
    cursor: pointer;
    transition: all var(--dur-fast) var(--ease);
}
.cf-radio:has(input[type="radio"]:checked) {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-weight: var(--fw-bold);
}
.cf-radio input[type="radio"] { accent-color: var(--color-primary); margin-right: 6px; }
.cf-modal #reportDetail {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 13px;
    background: var(--color-bg);
    resize: vertical;
    min-height: 70px;
}
.cf-modal #reportDetail:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-surface);
}
.cf-modal__actions {
    display: flex; justify-content: flex-end; gap: 8px;
    margin-top: 18px;
}

/* ── Toast ─────────────────────────────────────────────── */
.cf-toast {
    position: fixed;
    bottom: 24px; left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 11px 18px;
    background: var(--color-ink);
    color: #fff;
    border-radius: 10px;
    font-size: 13px;
    font-weight: var(--fw-bold);
    box-shadow: 0 12px 28px rgba(15,23,42,.25);
    z-index: 9100;
    opacity: 0;
    transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
    max-width: 90vw;
    text-align: center;
}
.cf-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.cf-toast--success { background: var(--color-secondary-deep); }
.cf-toast--error   { background: var(--color-warning-deep); }

/* ── Medium desktop (≤1199px): drop left rail, keep main + right ── */
@media (max-width: 1199.98px) {
    .cf-container { max-width: 1024px; }
    .cf-container--grid {
        grid-template-columns: minmax(0, 1fr) 280px;
    }
    .cf-rail { display: none; }
}

/* ── Tablet (≤991px): single column, sidebar collapses below main) ── */
@media (max-width: 991.98px) {
    .cf-container--grid {
        grid-template-columns: 1fr;
        gap: 18px;
        max-width: 720px;
    }
    /* Drawer: left rail becomes fixed slide-in panel on mobile/tablet */
    .cf-rail {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0; left: 0;
        height: 100vh;
        max-height: 100vh;
        width: 84vw;
        max-width: 320px;
        z-index: 1100;
        background: var(--color-surface);
        border-right: 1px solid var(--color-border);
        border-radius: 0 18px 18px 0;
        padding: 18px 14px 24px;
        box-shadow: 4px 0 24px -6px rgba(15,23,42,.18);
        transform: translateX(-105%);
        transition: transform .25s var(--ease);
        overflow-y: auto;
    }
    .cf-rail.is-open { transform: translateX(0); }
    .cf-rail-header { display: flex; }
    .cf-rail-close {
        position: absolute;
        top: 14px; right: 12px;
        width: 32px; height: 32px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: var(--color-bg);
        border: 1px solid var(--color-line);
        color: var(--color-muted);
        cursor: pointer;
        font-size: 13px;
        transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
    }
    .cf-rail-close:hover { background: var(--color-line); color: var(--color-ink); }
    .cf-rail-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15,23,42,.45);
        backdrop-filter: blur(2px);
        z-index: 1099;
        animation: cf-fade-in .18s var(--ease);
    }
    @keyframes cf-fade-in {
        from { opacity: 0; }
        to   { opacity: 1; }
    }

    .cf-side {
        position: static;
        max-height: none;
        overflow: visible;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .cf-side-card { flex: 1 1 calc(50% - 8px); min-width: 280px; }
    .cf-side-cta  { flex: 1 1 100%; }
}

/* Desktop: hide mobile drawer-only elements */
@media (min-width: 992px) {
    .cf-rail-toggle,
    .cf-rail-close,
    .cf-rail-backdrop { display: none !important; }
}

/* ── Mobile drawer toggle button ──────────────────────────── */
.cf-rail-toggle {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    margin-bottom: 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-ink);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.cf-rail-toggle:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
}
.cf-rail-toggle i { font-size: 13px; color: var(--color-primary); }
@media (max-width: 991.98px) {
    .cf-rail-toggle { display: inline-flex; }
}

/* ── Sticky top tabs on mobile ────────────────────────────── */
@media (max-width: 991.98px) {
    .cf-tabs {
        position: sticky;
        top: 0;
        z-index: 30;
        background: var(--color-bg);
        margin-left: -12px;
        margin-right: -12px;
        padding-left: 12px;
        padding-right: 12px;
        padding-top: 8px;
    }
    .cf-tab { min-height: 44px; padding: 10px 14px; }
}

/* ── Inline comment preview mobile ────────────────────────── */
@media (max-width: 640px) {
    .cf-preview-comments { padding: 4px 14px 12px; gap: 6px; }
    .cf-pc { padding-top: 6px; }
    .cf-pc__avatar { width: 28px; height: 28px; }
    .cf-pc__bubble { padding: 7px 10px; }
    .cf-pc__name { font-size: 12px; }
    .cf-pc__body { font-size: 12.5px; line-height: 1.4; }
    .cf-pc__time { font-size: 10.5px; }
    .cf-preview-more { padding-left: 36px; font-size: 12px; }
}

/* ── Mobile ────────────────────────────────────────────── */
@media (max-width: 640px) {
    .cf-wrap { padding: 16px 0 40px; }
    .cf-container { padding: 0 12px; }
    .cf-title { font-size: 20px; }
    .cf-card__menu {
        position: fixed;
        top: auto !important;
        bottom: 12px;
        left: 12px;
        right: 12px;
        width: auto;
        min-width: auto;
        max-width: none;
        max-height: calc(100vh - 24px);
        overflow-y: auto;
        border-radius: 16px;
        padding: 8px;
        box-shadow: 0 -8px 32px rgba(15,23,42,.18);
        z-index: 50;
    }
    .cf-card__menu .cf-menu-item {
        padding: 14px;
        font-size: 14px;
        min-height: 48px;
    }
    /* Backdrop khi menu mở trên mobile (Facebook-style bottom action sheet) */
    .cf-card__menu-wrap:has(.cf-card__menu:not([hidden]))::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, .45);
        backdrop-filter: blur(2px);
        z-index: 45;
        animation: cf-fade-in .15s var(--ease);
    }
    .cf-card__type-badge {
        font-size: 10px;
        padding: 3px 8px;
        letter-spacing: 0;
    }
    .cf-subtitle { font-size: 13px; }
    .cf-search { padding: 3px 3px 3px 12px; }
    .cf-search__input { padding: 9px 8px; font-size: 14px; }
    .cf-search__btn { padding: 7px 14px; font-size: 12px; }
    .cf-composer { padding: 10px 12px 6px; border-radius: 14px; }
    .cf-composer__row { gap: 10px; }
    .cf-composer__avatar { width: 38px; height: 38px; }
    .cf-composer__prompt { font-size: 13px; padding: 10px 14px; min-height: 42px; }
    .cf-composer__prompt-text { font-size: 13px; }
    .cf-composer__divider { margin: 10px -2px 6px; }
    .cf-composer__type-btn { font-size: 12px; padding: 9px 8px; gap: 6px; min-height: 40px; }
    .cf-composer__type-btn i { font-size: 14px; }
    /* Phone rất nhỏ: ẩn label, chỉ giữ icon */
    @media (max-width: 380px) {
        .cf-composer__type-btn span { display: none; }
        .cf-composer__type-btn { padding: 10px; }
    }
    .cf-composer-type-card { padding: 14px 14px; gap: 12px; min-height: 64px; }
    .cf-composer-type-icon { width: 40px; height: 40px; font-size: 17px; flex-shrink: 0; }
    .cf-composer-type-name { font-size: 14px; }
    .cf-composer-type-count { font-size: 11.5px; }
    .cf-composer-item { padding: 12px; min-height: 64px; }
    .cf-composer-item__cover { width: 40px; height: 40px; font-size: 20px; }
    .cf-composer-item__thumb { width: 60px; }
    .cf-composer-item__name { font-size: 13px; }
    /* Text post form textarea: lớn hơn để dễ gõ trên phone */
    .cf-text-post-form textarea { font-size: 15px; padding: 12px; min-height: 140px; }
    .cf-text-post-meta { gap: 8px; }
    .cf-text-post-head { gap: 10px; margin-bottom: 12px; }
    .cf-text-post-icon { width: 38px; height: 38px; font-size: 16px; border-radius: 11px; }
    .cf-text-post-prompts { gap: 5px; margin-bottom: 8px; }
    .cf-prompt-chip { padding: 5px 10px; font-size: 11.5px; }
    .cf-prompt-chip i { font-size: 10.5px; }
    /* Modal action buttons full-width và bự hơn */
    .cf-modal__actions { gap: 8px; flex-wrap: wrap; }
    .cf-modal__actions .cf-btn { flex: 1; min-height: 44px; padding: 11px 16px; font-size: 14px; }
    .cf-side-card { flex: 1 1 100%; padding: 14px; }
    .cf-side-card__title { font-size: 12.5px; }
    .cf-trending-chip { font-size: 11.5px; padding: 5px 9px; }
    .cf-tabs { gap: 0; }
    .cf-tab { padding: 9px 11px 10px; font-size: 12.5px; }

    .cf-card { border-radius: 14px; }
    .cf-card__head { padding: 12px 14px 8px; }
    .cf-author__avatar { width: 36px; height: 36px; }
    .cf-author__name { font-size: 13.5px; }
    .cf-author__sub { font-size: 11.5px; }
    .cf-card__type-badge { font-size: 10px; padding: 3px 8px; }

    .cf-card__body { padding: 6px 14px 12px; gap: 12px; flex-direction: column; }
    .cf-vocab-cover { width: 100%; height: 140px; border-radius: 14px; }
    .cf-vocab-cover > i { font-size: 52px; }
    .cf-vocab-cover__count strong { font-size: 22px; }
    .cf-vocab-cover__count small { font-size: 12px; }
    .cf-vocab-cover__cefr { font-size: 11.5px; padding: 4px 10px; }
    .cf-shadow-thumb { width: 100%; }
    .cf-card__title { font-size: 15px; }
    .cf-card__desc { font-size: 12.5px; }

    .cf-card__foot { padding: 10px 14px 12px; flex-direction: column; align-items: stretch; gap: 10px; }
    .cf-card__stats { justify-content: space-between; font-size: 11.5px; }
    .cf-card__actions { justify-content: space-between; }
    .cf-cta { margin-left: 0; flex: 1; justify-content: center; min-height: 42px; padding: 10px 16px; }
    /* Touch target ≥ 40px theo Apple/Google HIG */
    .cf-act { width: 42px; height: 42px; font-size: 14px; }
    .cf-card__menu-btn { width: 40px; height: 40px; font-size: 15px; }
    .cf-stat-toggle { padding: 6px 4px; min-height: 32px; }

    .cf-radio-grid { grid-template-columns: 1fr; }
    /* Bottom-sheet style trên phone: slide-up từ đáy, chiếm 92vh */
    .cf-modal { padding: 0; align-items: flex-end; }
    .cf-modal__card {
        padding: 22px 18px 24px;
        border-radius: 20px 20px 0 0;
        max-height: 92vh;
        width: 100%;
        animation: cfModalSlideUp .25s var(--ease);
    }
    @keyframes cfModalSlideUp {
        from { transform: translateY(100%); }
        to   { transform: translateY(0); }
    }
    .cf-modal__close { top: 10px; right: 12px; }
    /* Drag handle indicator */
    .cf-modal__card::before {
        content: '';
        display: block;
        width: 38px; height: 4px;
        background: var(--color-line);
        border-radius: 99px;
        margin: -6px auto 14px;
    }
}

@media (max-width: 400px) {
    .cf-pagination { flex-direction: column; }
    .cf-page-btn { width: 100%; justify-content: center; }
}

@media (hover: none) {
    .cf-card:hover { transform: none; box-shadow: none; border-color: var(--color-border); }
    .cf-cta:hover { transform: none; }
}