/* Community Page */
.cm-main { background: var(--surface-page); min-height: calc(100vh - 120px); }

.cm-page-header { margin-bottom: 16px; padding-top: 12px; }
.cm-page-header h1 { font-size: 22px; font-weight: var(--font-bold); color: var(--gray-900); margin: 0 0 2px; }
.cm-page-header p { font-size: var(--text-sm); color: var(--gray-500); margin: 0; }

/* Composer */
.cm-composer { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-bottom: 14px; }
.cm-composer-row { display: flex; gap: 10px; }
.cm-composer-avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.cm-composer-body { flex: 1; min-width: 0; }
.cm-composer-title { width: 100%; padding: 6px 0; border: none; border-bottom: 1px solid var(--border); font-size: 14px; font-weight: var(--font-semibold); font-family: var(--font-family); color: var(--gray-900); margin-bottom: 6px; outline: none; }
.cm-composer-title::placeholder { color: var(--gray-400); font-weight: normal; }
/* Rich text toolbar */
.cm-rt-toolbar {
    display: flex; align-items: center; gap: 1px; padding: 3px 4px;
    background: var(--gray-100); border-radius: 6px; margin-bottom: 8px;
}
.cm-rt-toolbar button, .cm-rt-btn {
    background: none; border: none; color: var(--gray-500); cursor: pointer;
    padding: 5px 7px; border-radius: 4px; font-size: 13px;
    display: inline-flex; align-items: center; justify-content: center;
    transition: all 0.1s;
}
.cm-rt-toolbar button:hover, .cm-rt-btn:hover { background: var(--white); color: var(--gray-900); box-shadow: 0 1px 2px rgba(0,0,0,0.08); }
.cm-rt-sep { width: 1px; height: 18px; background: var(--gray-300); margin: 0 3px; }

/* Editor area */
.cm-composer-editor {
    min-height: 80px; max-height: 300px; overflow-y: auto;
    padding: 10px 12px; font-size: 14px; font-family: var(--font-family); color: var(--gray-800);
    line-height: 1.7; outline: none;
    border: 1px solid var(--border); border-radius: 8px;
    background: var(--white);
}
.cm-composer-editor:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.08); }
.cm-composer-editor:empty::before { content: attr(data-placeholder); color: var(--gray-400); pointer-events: none; }
.cm-composer-editor img { max-width: 100%; max-height: 300px; border-radius: 6px; margin: 6px 0; display: block; }
.cm-composer-editor a { color: var(--primary); }
.cm-composer-editor ul, .cm-composer-editor ol { padding-left: 20px; margin: 4px 0; }

/* Emoji picker */
.cm-emoji-picker { background: var(--white); border: 1px solid var(--border); border-radius: 8px; padding: 8px; margin-bottom: 6px; max-height: 180px; overflow-y: auto; }
.cm-emoji-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 2px; }
.cm-emoji-btn { background: none; border: none; font-size: 20px; cursor: pointer; padding: 4px; border-radius: 4px; text-align: center; }
.cm-emoji-btn:hover { background: var(--gray-100); }
.cm-composer-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border); }
.cm-composer-tools { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.cm-tool-btn { cursor: pointer; color: var(--gray-400); font-size: 16px; padding: 4px; }
.cm-tool-btn:hover { color: var(--primary); }
.cm-category-select { padding: 3px 6px; border: 1px solid var(--border); border-radius: 4px; font-size: 11px; font-family: var(--font-family); color: var(--gray-600); }
.cm-tags-input { padding: 3px 6px; border: 1px solid var(--border); border-radius: 4px; font-size: 11px; width: 120px; font-family: var(--font-family); }
.cm-composer-loc { font-size: 10px; color: var(--gray-400); align-items: center; gap: 3px; margin-left: auto; }
.cm-composer-loc i { font-size: 9px; }

.cm-image-preview { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.cm-img-thumb { width: 60px; height: 60px; border-radius: 6px; background-size: cover; background-position: center; position: relative; }
.cm-img-remove { position: absolute; top: -4px; right: -4px; width: 18px; height: 18px; border-radius: 50%; background: var(--error); color: #fff; border: none; font-size: 12px; cursor: pointer; display: flex; align-items: center; justify-content: center; }

.cm-login-prompt { text-align: center; padding: 14px; background: var(--gray-100); border-radius: 8px; margin-bottom: 14px; font-size: 13px; color: var(--gray-500); }
.cm-login-prompt a { color: var(--primary); font-weight: var(--font-semibold); }

/* Filters — sticky on scroll */
.cm-filters { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; position: sticky; top: var(--header-height, 56px); z-index: 20; background: #F9FAFB; padding: 10px 0; transition: box-shadow 0.2s; }
.cm-filters.stuck { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }

/* Floating new-post bar — shows when scrolling up */
.cm-float-composer { position: sticky; top: calc(var(--header-height, 56px) + 46px); z-index: 19; display: none; margin-bottom: 10px; }
.cm-float-composer.visible { display: flex; }
.cm-float-composer-inner { display: flex; align-items: center; gap: 10px; width: 100%; background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 8px 14px; box-shadow: 0 2px 8px rgba(0,0,0,0.06); cursor: pointer; transition: border-color 0.15s; }
.cm-float-composer-inner:hover { border-color: var(--primary); }
.cm-float-composer-inner img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.cm-float-composer-inner span { flex: 1; font-size: 13px; color: var(--gray-400); }
.cm-float-composer-inner .btn { flex-shrink: 0; }
.cm-tabs { display: flex; gap: 4px; }
.cm-tab { padding: 5px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; background: var(--white); color: var(--gray-600); cursor: pointer; font-family: var(--font-family); }
.cm-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.cm-search-wrap { position: relative; flex: 1; min-width: 100px; }
.cm-search-wrap i { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); color: var(--gray-400); font-size: 12px; }
.cm-search-input { width: 100%; padding: 6px 8px 6px 28px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; font-family: var(--font-family); }

/* Post Cards (feed) */
.cm-post-card { display: block; background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-bottom: 10px; text-decoration: none; color: inherit; transition: border-color 0.15s; }
.cm-post-card:hover { border-color: var(--primary); }
.cm-pc-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.cm-pc-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.cm-pc-author { flex: 1; min-width: 0; }
.cm-pc-name { font-size: 13px; font-weight: var(--font-semibold); color: var(--gray-900); display: block; }
.cm-pc-meta { font-size: 10px; color: var(--gray-400); }
.cm-cat-badge { font-size: 10px; padding: 2px 8px; border-radius: 99px; font-weight: var(--font-semibold); flex-shrink: 0; }
.cm-cat-discussion { background: #DBEAFE; color: #1E40AF; }
.cm-cat-question { background: #FEF3C7; color: #92400E; }
.cm-cat-resource { background: #D1FAE5; color: #065F46; }
.cm-cat-announcement { background: #FEE2E2; color: #991B1B; }
.cm-pc-title { font-size: 15px; font-weight: var(--font-bold); color: var(--gray-900); margin-bottom: 4px; line-height: 1.3; }
.cm-pc-content { font-size: 13px; color: var(--gray-600); line-height: 1.5; margin-bottom: 6px; }
/* Image grid: 1 = full, 2 = side-by-side, 3 = 1 big + 2 small */
.cm-pc-images {
    display: grid !important;
    gap: 4px;
    margin-bottom: 8px;
    border-radius: 10px;
    overflow: hidden;
    width: 100%;
}
.cm-pc-images.img-1 { grid-template-columns: 1fr !important; }
.cm-pc-images.img-2 { grid-template-columns: 1fr 1fr !important; }
.cm-pc-images.img-3 { grid-template-columns: 1fr 1fr !important; }
.cm-pc-images.img-3 .cm-pc-img:first-child { grid-column: 1 / -1 !important; }
.cm-pc-img {
    width: 100% !important;
    background-size: cover !important;
    background-position: center !important;
    background-color: var(--gray-200);
    border-radius: 0;
    min-height: 100px;
}
.cm-pc-images.img-1 .cm-pc-img { height: 280px !important; }
.cm-pc-images.img-2 .cm-pc-img { height: 200px !important; }
.cm-pc-images.img-3 .cm-pc-img:first-child { height: 220px !important; }
.cm-pc-images.img-3 .cm-pc-img:not(:first-child) { height: 140px !important; }

/* Post detail page images — full size */
.cm-post-images {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}
.cm-post-images img {
    width: 100% !important;
    height: auto !important;
    max-height: none !important;
    object-fit: contain;
    border-radius: 10px;
    cursor: pointer;
}
.cm-pc-footer { display: flex; gap: 12px; font-size: 11px; color: var(--gray-400); }

/* Post Detail */
.cm-back { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--gray-500); text-decoration: none; margin-bottom: 14px; }
.cm-back:hover { color: var(--primary); }
.cm-post-detail { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 18px; margin-bottom: 16px; }
.cm-post-author { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; }
.cm-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.cm-author-name { font-size: 14px; font-weight: var(--font-semibold); color: var(--gray-900); }
.cm-post-meta-line { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--gray-400); flex-wrap: wrap; }
.cm-time { color: var(--gray-400); }
.cm-loc { color: var(--gray-400); }
.cm-post-title { font-size: 20px; font-weight: var(--font-bold); color: var(--gray-900); margin-bottom: 10px; line-height: 1.3; }
.cm-post-content { font-size: 14px; color: var(--gray-700); line-height: 1.8; margin-bottom: 12px; white-space: pre-wrap; word-break: break-word; }

/* YouTube embed */
.cm-yt-embed { position: relative; padding-bottom: 56.25%; height: 0; margin: 12px 0; border-radius: 8px; overflow: hidden; background: var(--gray-100); }
.cm-yt-embed iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

/* URL links in posts */
.cm-url-link { color: var(--primary); word-break: break-all; }
.cm-url-link:hover { text-decoration: underline; }

/* YouTube thumbnail in feed cards */
.cm-pc-yt-thumb { position: relative; width: 100%; border-radius: 8px; overflow: hidden; margin-top: 8px; background: var(--gray-100); aspect-ratio: 16/9; }
.cm-pc-yt-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cm-pc-yt-play { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 48px; height: 48px; background: rgba(0,0,0,0.7); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; pointer-events: none; }
.cm-post-images { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.cm-post-images img { max-width: 100%; max-height: 400px; border-radius: 8px; cursor: pointer; object-fit: cover; }
.cm-post-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.cm-tag { font-size: 11px; color: var(--primary); text-decoration: none; background: var(--primary-lighter, #EFF6FF); padding: 2px 8px; border-radius: 4px; }
.cm-tag:hover { background: var(--primary-light, #DBEAFE); }
.cm-post-stats { display: flex; gap: 12px; font-size: 12px; color: var(--gray-400); padding-top: 10px; border-top: 1px solid var(--border); }
.cm-delete-btn { background: none; border: none; color: var(--gray-400); cursor: pointer; font-size: 11px; margin-left: auto; }
.cm-delete-btn:hover { color: var(--error); }

/* Responses */
.cm-responses-section { margin-bottom: 20px; }
.cm-responses-title { font-size: 15px; font-weight: var(--font-bold); color: var(--gray-900); margin-bottom: 12px; }
.cm-reply-form { display: flex; gap: 8px; margin-bottom: 14px; }
.cm-reply-avatar { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.cm-reply-body { flex: 1; }
.cm-reply-body textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; font-family: var(--font-family); resize: vertical; margin-bottom: 6px; }
.cm-response { display: flex; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.cm-response:last-child { border-bottom: none; }
.cm-response-header { display: flex; align-items: center; gap: 6px; margin-bottom: 2px; }
.cm-response-header strong { font-size: 12px; color: var(--gray-900); }
.cm-response-content { font-size: 13px; color: var(--gray-700); line-height: 1.6; white-space: pre-wrap; }
.cm-empty-responses { text-align: center; padding: 20px; color: var(--gray-400); font-size: 13px; }

/* Inline notice */
.cm-notice { padding: 8px 14px; border-radius: 6px; font-size: 12px; margin-top: 8px; animation: cmFadeIn 0.2s; }
.cm-notice-error { background: #FEE2E2; color: #991B1B; }
.cm-notice-success { background: #D1FAE5; color: #065F46; }
@keyframes cmFadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }

/* Loading & Empty */
.cm-loading { text-align: center; padding: 20px; color: var(--gray-400); font-size: 13px; }
.cm-empty-feed { text-align: center; padding: 40px 20px; color: var(--gray-400); font-size: 14px; }

/* Responsive */
@media (max-width: 768px) {
    .cm-page-header h1 { font-size: 18px; }
    .cm-composer { padding: 10px; }
    .cm-composer-avatar { width: 30px; height: 30px; }
    .cm-composer-row { flex-direction: column; gap: 8px; }
    .cm-composer-row .cm-composer-avatar { display: none; }
    .cm-composer-title { font-size: 13px; }
    .cm-rt-toolbar { gap: 2px; }
    .cm-rt-toolbar button, .cm-rt-btn { padding: 4px 6px; font-size: 12px; }
    .cm-composer-editor { min-height: 60px; font-size: 13px; padding: 8px 10px; }
    .cm-composer-footer { flex-direction: column; gap: 8px; align-items: stretch; }
    .cm-composer-tools { flex-wrap: wrap; gap: 6px; }
    .cm-category-select { flex: 0 0 auto; }
    .cm-tags-input { flex: 1; min-width: 120px; }
    .cm-composer-loc { margin-left: 0; }
    #postBtn { align-self: flex-end; }
    .cm-filters { flex-direction: column; gap: 6px; }
    .cm-tabs { width: 100%; overflow-x: auto; flex-wrap: nowrap; }
    .cm-tab { flex-shrink: 0; }
    .cm-search-wrap { width: 100%; }
    .cm-post-card { padding: 12px; }
    .cm-pc-avatar { width: 28px; height: 28px; }
    .cm-post-detail { padding: 14px; }
    .cm-post-title { font-size: 17px; }
    .cm-post-content { font-size: 13px; }
}

/* ============================================================
   Document attachments — composer preview + feed/detail chips
   ============================================================ */

/* Composer preview row (sits below the image preview) */
.cm-doc-preview {
    display: flex; flex-direction: column; gap: 6px;
    margin-top: 6px;
}
.cm-doc-preview:empty { display: none; }

/* Download chip — used in composer preview AND feed/detail render */
.cm-doc-chip {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 8px 12px;
    background: var(--gray-100, #F9FAFB);
    border: 1px solid var(--border, #E5E7EB);
    border-radius: var(--radius, 6px);
    text-decoration: none; color: var(--gray-800, #374151);
    font-size: 13px; line-height: 1.3;
    transition: background 0.15s, border-color 0.15s;
    max-width: 100%;
}
.cm-doc-chip:hover {
    background: var(--primary-lighter, #EFF6FF);
    border-color: var(--primary-light, #DBEAFE);
    color: var(--gray-900, #1F2937);
}

/* File-type icon color */
.cm-doc-chip > i.fa-file-pdf { color: #DC2626; font-size: 18px; flex-shrink: 0; }
.cm-doc-chip > i.fa-file-powerpoint { color: var(--accent, #D97706); font-size: 18px; flex-shrink: 0; }

.cm-doc-name {
    font-weight: 600; color: var(--gray-900, #1F2937);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    flex: 1; min-width: 0;
}
.cm-doc-size {
    color: var(--gray-500, #9CA3AF); font-size: 12px; flex-shrink: 0;
}
.cm-doc-dl {
    color: var(--gray-400, #D1D5DB); font-size: 12px; flex-shrink: 0;
    margin-left: 4px;
}
.cm-doc-chip:hover .cm-doc-dl { color: var(--primary, #2563EB); }

/* Remove "x" button in composer preview (only present while pending) */
.cm-doc-remove {
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--error, #DC2626); color: #FFF;
    border: none; font-size: 14px; line-height: 1; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; margin-left: 4px;
    padding: 0;
}
.cm-doc-remove:hover { background: #991B1B; }

/* Feed/detail render wrapper */
.cm-post-docs {
    display: flex; flex-direction: column; gap: 6px;
    margin-top: 10px;
}

@media (max-width: 600px) {
    .cm-doc-chip { padding: 8px 10px; font-size: 12px; }
    .cm-doc-chip > i.fa-file-pdf,
    .cm-doc-chip > i.fa-file-powerpoint { font-size: 16px; }
}

/* ============================================================
   Document preview modal — inline PDF viewer / PPT fallback
   ============================================================ */

.cm-doc-modal {
    position: fixed; inset: 0; z-index: 1200;
    background: rgba(17, 24, 39, 0.72);
    display: none; align-items: center; justify-content: center;
    padding: 24px;
}
.cm-doc-modal.is-open { display: flex; }

.cm-doc-modal-shell {
    width: 100%; max-width: 960px; height: 90vh; max-height: 900px;
    background: var(--white, #FFFFFF);
    border-radius: var(--radius-lg, 12px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
    display: flex; flex-direction: column; overflow: hidden;
}

.cm-doc-modal-head {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 18px; border-bottom: 1px solid var(--border, #E5E7EB);
    background: var(--white, #FFF);
    flex-shrink: 0;
}
.cm-doc-modal-meta {
    display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0;
}
.cm-doc-modal-icon { font-size: 22px; flex-shrink: 0; }
.cm-doc-modal-icon.fa-file-pdf { color: #DC2626; }
.cm-doc-modal-icon.fa-file-powerpoint { color: var(--accent, #D97706); }

.cm-doc-modal-fname {
    font-weight: 600; color: var(--gray-900, #1F2937); font-size: 14px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    flex: 1; min-width: 0;
}
.cm-doc-modal-fsize {
    color: var(--gray-500, #9CA3AF); font-size: 12px; flex-shrink: 0;
}

.cm-doc-modal-actions {
    display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}
.cm-doc-modal-close {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--gray-100, #F9FAFB); color: var(--gray-600, #6B7280);
    border: none; font-size: 20px; line-height: 1; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    padding: 0;
}
.cm-doc-modal-close:hover { background: var(--gray-200, #F3F4F6); color: var(--gray-900, #1F2937); }

.cm-doc-modal-body {
    flex: 1; min-height: 0;
    background: var(--gray-100, #F9FAFB);
    position: relative; overflow: hidden;
}
.cm-doc-modal-iframe {
    width: 100%; height: 100%; border: none; display: block;
    background: #FFFFFF;
}

.cm-doc-modal-fallback {
    height: 100%; padding: 40px 24px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 16px; text-align: center;
}
.cm-doc-modal-fallback > i {
    font-size: 56px; color: var(--accent, #D97706); opacity: 0.85;
}
.cm-doc-modal-fallback > p {
    max-width: 480px; font-size: 14px; line-height: 1.55;
    color: var(--gray-700, #4B5563); margin: 0;
}

@media (max-width: 600px) {
    .cm-doc-modal { padding: 0; }
    .cm-doc-modal-shell { height: 100vh; max-height: 100vh; border-radius: 0; max-width: 100%; }
    .cm-doc-modal-head { padding: 10px 12px; }
    .cm-doc-modal-fname { font-size: 13px; }
    .cm-doc-modal-fsize { display: none; }
    .cm-doc-modal-actions .btn { padding: 6px 10px; font-size: 12px; }
}