/* ============================================================
   Course Central – Comments Section (YouTube-Style)
   ============================================================ */

/* ── Variables ──────────────────────────────────────────────── */
:root {
    --cc-cmt-bg:       #ffffff;
    --cc-cmt-border:   #e2e8f0;
    --cc-cmt-text:     #1e293b;
    --cc-cmt-muted:    #64748b;
    --cc-cmt-surface:  #f8fafc;
    --cc-cmt-p:        #4f46e5;
    --cc-cmt-line:     #e2e8f0;
    --cc-cmt-hover:    #f1f5f9;
    --cc-cmt-r:        8px;
    --cc-cmt-like:     #16a34a;
    --cc-cmt-dislike:  #dc2626;
    --cc-cmt-report:   #f59e0b;
}
[data-theme="dark"] {
    --cc-cmt-bg:      #0f172a;
    --cc-cmt-border:  #334155;
    --cc-cmt-text:    #e2e8f0;
    --cc-cmt-muted:   #94a3b8;
    --cc-cmt-surface: #1e293b;
    --cc-cmt-line:    #334155;
    --cc-cmt-hover:   #1e293b;
}

/* ── Section Wrapper ────────────────────────────────────────── */
.cc-comments-section {
    padding: 8px 0 40px;
}
.cc-panel.cc-comments-panel {
    padding: 28px 32px 32px;
}

/* ── Header Row ─────────────────────────────────────────────── */
.cc-cmt-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.cc-cmt-count-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--cc-cmt-text);
    margin: 0;
}
.cc-cmt-sort-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--cc-cmt-muted);
}
.cc-cmt-sort-btn {
    background: none;
    border: 1px solid var(--cc-cmt-border);
    border-radius: 20px;
    padding: 4px 14px;
    font-size: 12.5px;
    color: var(--cc-cmt-muted);
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.cc-cmt-sort-btn.active,
.cc-cmt-sort-btn:hover {
    background: var(--cc-cmt-p);
    border-color: var(--cc-cmt-p);
    color: #fff;
}

/* ── New Comment Composer ───────────────────────────────────── */
.cc-cmt-new-wrap {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    align-items: flex-start;
}
.cc-cmt-avatar {
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--cc-cmt-surface);
    border: 2px solid var(--cc-cmt-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: var(--cc-cmt-p);
    overflow: hidden;
}
.cc-cmt-avatar img { width: 100%; height: 100%; object-fit: cover; }
.cc-cmt-avatar-sm {
    flex: 0 0 32px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 13px;
}
.cc-cmt-composer {
    flex: 1;
}
.cc-cmt-input-area {
    width: 100%;
    min-height: 42px;
    max-height: 180px;
    padding: 10px 14px;
    border: none;
    border-bottom: 1.5px solid var(--cc-cmt-border);
    border-radius: 0;
    background: transparent;
    font-size: 14px;
    color: var(--cc-cmt-text);
    outline: none;
    resize: none;
    overflow-y: auto;
    line-height: 1.5;
    box-sizing: border-box;
    transition: border-color .15s;
    font-family: inherit;
}
.cc-cmt-input-area:focus {
    border-bottom-color: var(--cc-cmt-p);
}
.cc-cmt-input-area:empty::before {
    content: attr(data-placeholder);
    color: var(--cc-cmt-muted);
    pointer-events: none;
}

/* ── Formatting Toolbar ─────────────────────────────────────── */
.cc-cmt-fmt-bar {
    display: none;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    padding: 0 4px;
}
.cc-cmt-composer.cc-cmt-composer-open .cc-cmt-fmt-bar { display: flex; }
.cc-cmt-fmt-btn {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 4px;
    background: none;
    color: var(--cc-cmt-muted);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background .12s;
}
.cc-cmt-fmt-btn:hover { background: var(--cc-cmt-hover); color: var(--cc-cmt-text); }

/* ── Composer action bar ────────────────────────────────────── */
.cc-cmt-compose-actions {
    display: none;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}
.cc-cmt-composer.cc-cmt-composer-open .cc-cmt-compose-actions { display: flex; }

.cc-cmt-btn {
    height: 36px;
    padding: 0 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background .15s;
}
.cc-cmt-btn-cancel {
    background: none;
    color: var(--cc-cmt-muted);
}
.cc-cmt-btn-cancel:hover { background: var(--cc-cmt-hover); color: var(--cc-cmt-text); }
.cc-cmt-btn-submit {
    background: var(--cc-cmt-p);
    color: #fff;
}
.cc-cmt-btn-submit:hover { opacity: .9; }
.cc-cmt-btn-submit:disabled { opacity: .5; cursor: not-allowed; }

/* ── Comments List ──────────────────────────────────────────── */
.cc-cmts-list { position: relative; }

/* ── Single Comment ─────────────────────────────────────────── */
.cc-cmt-item {
    display: flex;
    gap: 12px;
    position: relative;
    padding-bottom: 12px;
}

/* ── Vertical Connecting Line (YouTube-style) ───────────────── */
.cc-cmt-thread {
    position: relative;
    flex: 0 0 38px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.cc-cmt-thread::after {
    content: '';
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    background: var(--cc-cmt-line);
    bottom: 0;
    border-radius: 1px;
}
.cc-cmt-item:last-child > .cc-cmt-thread::after { display: none; }

/* Reply-item thread lines are suppressed — the .cc-cmt-replies border-left serves as connector */

/* ── Comment Body ───────────────────────────────────────────── */
.cc-cmt-body {
    flex: 1;
    min-width: 0;
    padding-top: 2px;
}
.cc-cmt-top-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}
.cc-cmt-author {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--cc-cmt-text);
}
.cc-cmt-time {
    font-size: 12px;
    color: var(--cc-cmt-muted);
}
.cc-cmt-edited {
    font-size: 11px;
    color: var(--cc-cmt-muted);
    font-style: italic;
}
.cc-cmt-text {
    font-size: 14px;
    color: var(--cc-cmt-text);
    line-height: 1.6;
    word-break: break-word;
}
.cc-cmt-text b, .cc-cmt-text strong { font-weight: 700; }
.cc-cmt-text i, .cc-cmt-text em     { font-style: italic; }

/* ── Action Bar ─────────────────────────────────────────────── */
.cc-cmt-actions-row {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    flex-wrap: wrap;
}
.cc-cmt-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12.5px;
    color: var(--cc-cmt-muted);
    padding: 4px 8px;
    border-radius: 20px;
    transition: background .12s, color .12s;
}
.cc-cmt-action-btn:hover { background: var(--cc-cmt-hover); color: var(--cc-cmt-text); }
.cc-cmt-action-btn.cc-cmt-liked    { color: var(--cc-cmt-like);    }
.cc-cmt-action-btn.cc-cmt-disliked { color: var(--cc-cmt-dislike); }
.cc-cmt-spacer { flex: 1; }
.cc-cmt-report-btn {
    margin-left: auto;
    font-size: 12px;
    color: var(--cc-cmt-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 20px;
    transition: background .12s, color .12s;
}
.cc-cmt-report-btn:hover { background: #fef9c3; color: var(--cc-cmt-report); }

/* ── Reply Area ─────────────────────────────────────────────── */
.cc-reply-form-wrap {
    display: none;
    margin-top: 10px;
    margin-left: 0;
}
.cc-reply-form-wrap.open { display: flex; gap: 10px; flex-direction: column; }

/* ── Replies Container ──────────────────────────────────────── */
.cc-cmt-replies {
    margin-top: 8px;
    margin-left: 19px;          /* aligned with avatar centre */
    padding-left: 20px;
    border-left: 2px solid var(--cc-cmt-line);
    border-radius: 0 0 0 2px;
}
/* Hide the per-item thread line inside replies — the container border handles it */
.cc-cmt-replies .cc-cmt-item > .cc-cmt-thread::after { display: none; }

/* ── Toggle Replies Button ──────────────────────────────────── */
.cc-cmt-toggle-replies {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--cc-cmt-p);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 0;
    margin-top: 6px;
    transition: color .15s;
}
.cc-cmt-toggle-replies svg {
    transition: transform .2s;
}
.cc-cmt-toggle-replies.open svg { transform: rotate(180deg); }

/* ── Load More Comments ────────────────────────────────────── */
.cc-cmt-load-more-wrap {
    text-align: center;
    margin-top: 20px;
}
.cc-cmt-load-more-btn {
    background: none;
    border: 1.5px solid var(--cc-cmt-border);
    border-radius: 20px;
    padding: 8px 24px;
    font-size: 13.5px;
    color: var(--cc-cmt-p);
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, border-color .15s;
}
.cc-cmt-load-more-btn:hover { background: rgba(79,70,229,.06); border-color: var(--cc-cmt-p); }

/* ── Login Prompt (when not logged in) ─────────────────────── */
.cc-cmt-login-prompt {
    padding: 18px 20px;
    background: var(--cc-cmt-surface);
    border: 1.5px dashed var(--cc-cmt-border);
    border-radius: var(--cc-cmt-r);
    text-align: center;
    font-size: 14px;
    color: var(--cc-cmt-muted);
    margin-bottom: 24px;
}
.cc-cmt-login-prompt a {
    color: var(--cc-cmt-p);
    font-weight: 600;
    text-decoration: none;
}
.cc-cmt-login-prompt a:hover { text-decoration: underline; }

/* ── Report Modal ───────────────────────────────────────────── */
.cc-cmt-report-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 9000;
    display: none;
    align-items: center;
    justify-content: center;
}
.cc-cmt-report-modal-backdrop.open { display: flex; }
.cc-cmt-report-modal {
    background: var(--cc-cmt-bg);
    border-radius: 12px;
    padding: 28px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.cc-cmt-report-modal h3 {
    margin: 0 0 16px;
    font-size: 17px;
    color: var(--cc-cmt-text);
}
.cc-cmt-report-reasons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.cc-cmt-report-reason {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1.5px solid var(--cc-cmt-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13.5px;
    color: var(--cc-cmt-text);
    transition: border-color .12s;
}
.cc-cmt-report-reason:hover { border-color: var(--cc-cmt-p); }
.cc-cmt-report-reason input[type=radio] { accent-color: var(--cc-cmt-p); }
.cc-cmt-report-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ── Empty State ────────────────────────────────────────────── */
.cc-cmt-empty {
    padding: 32px 20px;
    text-align: center;
    color: var(--cc-cmt-muted);
    font-size: 14px;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 600px) {
    .cc-panel.cc-comments-panel { padding: 20px 16px; }
    .cc-cmt-new-wrap { gap: 8px; }
    .cc-cmt-avatar { flex: 0 0 32px; width: 32px; height: 32px; font-size: 13px; }
    .cc-cmt-thread { flex: 0 0 32px; }
    .cc-cmt-item { gap: 8px; }
    .cc-cmt-report-modal { margin: 16px; }
}