/* Comment Tree */
.comment-tree {
    display: flex;
    flex-direction: column;
}

.comment {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: var(--space-xs);
    animation: comment-fade-in 0.3s ease both;
}

@keyframes comment-fade-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.comment__gutter {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 20px;
    flex-shrink: 0;
    margin-right: var(--space-sm);
}

.comment__collapse-btn {
    width: 20px;
    height: 20px;
    padding: 0;
    border: none;
    background: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: color var(--transition), background-color var(--transition);
}

.comment__collapse-btn:hover {
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
}

.comment__thread-line {
    flex: 1;
    width: 2px;
    background-color: var(--color-border);
    margin-top: 4px;
    border-radius: 1px;
    transition: background-color var(--transition);
}

.comment:hover > .comment__gutter > .comment__thread-line {
    background-color: var(--color-accent);
    box-shadow: 0 0 6px rgba(124, 92, 191, 0.3);
}

/* Depth-based thread line colors */
.comment[data-depth="0"] > .comment__gutter > .comment__thread-line { background-color: rgba(124, 92, 191, 0.5); }
.comment[data-depth="1"] > .comment__gutter > .comment__thread-line { background-color: rgba(139, 108, 199, 0.4); }
.comment[data-depth="2"] > .comment__gutter > .comment__thread-line { background-color: rgba(154, 124, 207, 0.35); }
.comment[data-depth="3"] > .comment__gutter > .comment__thread-line { background-color: rgba(169, 140, 215, 0.3); }
.comment[data-depth="4"] > .comment__gutter > .comment__thread-line { background-color: rgba(184, 156, 223, 0.25); }
.comment[data-depth="5"] > .comment__gutter > .comment__thread-line { background-color: rgba(199, 172, 231, 0.2); }

.comment__main {
    flex: 1;
    min-width: 0;
    padding: var(--space-sm) 0;
}

.comment__header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-xs);
}

.comment__author {
    font-weight: 600;
    color: var(--color-text);
}

.comment__time {
    color: var(--color-text-muted);
}

.comment__body {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.comment__footer {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-xs);
}

.comment__reply-btn,
.comment__edit-btn,
.comment__delete-btn {
    padding: 0;
    border: none;
    background: none;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    cursor: pointer;
    font-weight: 500;
    transition: color var(--transition);
}

.comment__reply-btn:hover { color: var(--color-accent); }
.comment__edit-btn:hover { color: var(--color-accent); }
.comment__delete-btn:hover { color: var(--color-danger); }

.comment__children {
    width: 100%;
    padding-left: calc(20px + var(--space-sm));
}

/* Collapsed state */
.comment--collapsed > .comment__main > .comment__body,
.comment--collapsed > .comment__main > .comment__footer,
.comment--collapsed > .comment__children {
    display: none;
}

.comment--collapsed > .comment__gutter > .comment__thread-line {
    display: none;
}

/* Hidden (moderated) */
.comment--hidden {
    opacity: 0.5;
}

/* Reply form inline */
.comment__reply-form {
    margin-top: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.comment__reply-form textarea {
    margin-bottom: var(--space-xs);
    min-height: 60px;
}

.comment__reply-form__actions {
    display: flex;
    gap: var(--space-sm);
}

@media (max-width: 480px) {
    .comment__children {
        padding-left: calc(16px + var(--space-xs));
    }

    .comment__gutter {
        width: 16px;
    }
}