/**
 * KiemLai Universe — Shared Comment Presentation Styles (MS-05E / E8C4-UX1)
 *
 * Scoped strictly to .kl-comment and .kl-comment__* namespace.
 * Utilizes KiemLai Reader & Theme tokens with resilient neutral fallbacks.
 * Pure shared presentation: contains no surface-specific or module-specific selectors.
 */

/* =========================================================
   1. COMMENT CARD BASE LAYOUT
   ========================================================= */

.kl-comment {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    font-family: var(--font-ui, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
    color: var(--reader-text, var(--theme-text, inherit));
    box-sizing: border-box;
}

.kl-comment--root {
    width: 100%;
}

.kl-comment--reply {
    width: 100%;
}

/* =========================================================
   2. COMMENT HEADER (AVATAR + AUTHOR + TIME + EDITED + MENU)
   ========================================================= */

.kl-comment__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    line-height: 1.4;
}

/* Avatar Image */
.kl-comment__avatar {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    background-color: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.15)));
}

/* Avatar Initials Fallback */
.kl-comment__avatar--fallback {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background-color: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.15)));
    color: var(--reader-text-muted, var(--theme-text-muted, inherit));
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    flex-shrink: 0;
    user-select: none;
}

/* Author Display Name */
.kl-comment__author {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--reader-text, var(--theme-text, inherit));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-decoration: none;
}

a.kl-comment__author:hover {
    text-decoration: underline;
}

/* Author Avatar Link */
.kl-comment__avatar-link {
    display: inline-flex;
    border-radius: 50%;
    text-decoration: none;
    flex-shrink: 0;
}

/* Created Timestamp */
.kl-comment__time {
    font-size: 0.75rem;
    color: var(--reader-text-muted, var(--theme-text-muted, currentColor));
    opacity: 0.75;
    white-space: nowrap;
}

/* Edited Badge */
.kl-comment__edited {
    font-size: 0.75rem;
    color: var(--reader-text-muted, var(--theme-text-muted, currentColor));
    opacity: 0.65;
    font-style: italic;
    cursor: default;
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
}

/* =========================================================
   3. OVERFLOW ACTIONS MENU (THREE-DOTS & POPOVER)
   ========================================================= */

.kl-comment__overflow {
    margin-left: auto;
    position: relative;
    display: inline-flex;
    align-items: center;
}

/* Trigger Button */
.kl-comment__menu-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--reader-text-muted, var(--theme-text-muted, inherit));
    cursor: pointer;
    font-size: 1.15rem;
    line-height: 1;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.kl-comment__menu-trigger:hover,
.kl-comment__overflow.is-open .kl-comment__menu-trigger {
    background: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.15)));
    color: var(--reader-text, var(--theme-text, inherit));
}

.kl-comment__menu-trigger:focus-visible {
    outline: 2px solid var(--reader-primary, var(--theme-primary, Highlight));
    outline-offset: 1px;
}

.kl-comment__menu-dots {
    display: inline-block;
    line-height: 1;
    transform: translateY(-2px);
    letter-spacing: -1px;
}

/* Popover Dropdown */
.kl-comment__menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    z-index: 30;
    min-width: 140px;
    padding: 0.35rem 0;
    background: var(--reader-surface, var(--theme-surface, ButtonFace));
    border: 1px solid var(--reader-border, var(--theme-border, rgba(128, 128, 128, 0.3)));
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    box-sizing: border-box;
}

.kl-comment__menu[hidden] {
    display: none !important;
}

/* Menu Items */
.kl-comment__menu-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.5rem 0.85rem;
    border: none;
    border-radius: 0;
    background: transparent;
    color: var(--reader-text, var(--theme-text, inherit));
    font: inherit;
    font-size: 0.85rem;
    font-weight: 400;
    line-height: 1.4;
    text-align: left;
    cursor: pointer;
    white-space: nowrap;
    box-sizing: border-box;
    transition: background-color 0.12s ease, color 0.12s ease;
}

.kl-comment__menu-item:hover,
.kl-comment__menu-item:focus-visible {
    background: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.15)));
    color: var(--reader-primary, var(--theme-primary, Highlight));
    outline: none;
}

/* Danger Menu Items (Delete, Report) */
.kl-comment__menu-item--danger {
    color: var(--reader-text, var(--theme-text, inherit));
}

.kl-comment__menu-item--danger:hover,
.kl-comment__menu-item--danger:focus-visible {
    color: var(--color-danger, var(--theme-danger, #dc2626));
    background: var(--color-danger-surface, var(--theme-danger-surface, rgba(220, 38, 38, 0.08)));
    outline: none;
}

.kl-comment__menu-separator {
    height: 1px;
    margin: 0.25rem 0;
    background: var(--reader-border, var(--theme-border, rgba(128, 128, 128, 0.3)));
}

/* =========================================================
   4. COMMENT BODY & TOMBSTONES
   ========================================================= */

.kl-comment__body {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--reader-text, var(--theme-text, inherit));
    word-break: break-word;
    white-space: pre-wrap;
}

/* Tombstone states */
.kl-comment--tombstone .kl-comment__body,
.kl-comment__body--tombstone {
    font-style: italic;
    color: var(--reader-text-muted, var(--theme-text-muted, inherit));
    opacity: 0.7;
    font-size: 0.8125rem;
}

/* =========================================================
   5. PRIMARY ACTIONS (INLINE REPLY AFFORDANCE)
   ========================================================= */

.kl-comment__primary-actions {
    margin-top: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.kl-comment__primary-action {
    background: none;
    border: none;
    padding: 0.25rem 0.5rem;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--reader-text-muted, var(--theme-text-muted, inherit));
    opacity: 0.85;
    cursor: pointer;
    border-radius: 4px;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.kl-comment__primary-action:hover {
    color: var(--reader-primary, var(--theme-primary, Highlight));
    background-color: transparent;
}

.kl-comment__primary-action:focus-visible {
    outline: 2px solid var(--reader-primary, var(--theme-primary, Highlight));
    outline-offset: 1px;
}

/* =========================================================
   6. SHARED COMMENT COMPOSER (ROOT & INLINE)
   ========================================================= */

.kl-comment-composer {
    box-sizing: border-box;
    font-family: var(--font-ui, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
}

.kl-comment-composer__form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-sizing: border-box;
}

.kl-comment-composer__label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--reader-text, var(--theme-text, #111827));
    margin: 0;
}

.kl-comment-composer__input,
.kl-comment-composer__textarea {
    width: 100%;
    min-height: 5rem;
    padding: 0.75rem 0.875rem;
    font-family: inherit;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--reader-text, var(--theme-text, #111827));
    background: var(--reader-surface, var(--theme-surface, #ffffff));
    border: 1px solid var(--reader-border, var(--theme-border, #d1d5db));
    border-radius: 8px;
    box-sizing: border-box;
    resize: vertical;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.kl-comment-composer__input:focus,
.kl-comment-composer__textarea:focus {
    outline: none;
    border-color: var(--reader-primary, var(--theme-primary, #2563eb));
    box-shadow: 0 0 0 3px var(--reader-focus-ring, rgba(37, 99, 235, 0.15));
}

.kl-comment-composer__input:disabled,
.kl-comment-composer__textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--reader-surface-disabled, var(--theme-surface-disabled, #f3f4f6));
}

.kl-comment-composer__input::placeholder,
.kl-comment-composer__textarea::placeholder {
    color: var(--reader-text-muted, var(--theme-text-muted, #9ca3af));
    opacity: 0.8;
}

.kl-comment-composer__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    min-height: 2.375rem;
}

.kl-comment-composer__status,
.kl-comment-composer__error {
    font-size: 0.875rem;
    line-height: 1.4;
    color: var(--color-danger, var(--theme-danger, #dc2626));
    font-weight: 500;
}

.kl-comment-composer__status:empty,
.kl-comment-composer__error:empty,
.kl-comment-composer__error[hidden] {
    display: none;
}

.kl-comment-composer__status.is-info {
    color: var(--reader-text-muted, var(--theme-text-muted, #6b7280));
}

.kl-comment-composer__actions {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.kl-comment-composer__submit,
.kl-comment-composer__btn--primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0.45rem 1.15rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    color: #ffffff;
    background-color: var(--reader-primary, var(--theme-primary, #2563eb));
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease, filter 0.15s ease, opacity 0.15s ease;
}

.kl-comment-composer__submit:hover:not(:disabled),
.kl-comment-composer__btn--primary:hover:not(:disabled) {
    background-color: var(--reader-primary-hover, var(--theme-primary-hover, #1d4ed8));
    filter: brightness(0.95);
}

.kl-comment-composer__submit:disabled,
.kl-comment-composer__btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.kl-comment-composer__submit:focus-visible,
.kl-comment-composer__btn--primary:focus-visible {
    outline: 2px solid var(--reader-primary, var(--theme-primary, #2563eb));
    outline-offset: 2px;
}

.kl-comment-composer__cancel,
.kl-comment-composer__btn--secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0.45rem 1.15rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--reader-text, var(--theme-text, #111827));
    background-color: var(--reader-surface, var(--theme-surface, transparent));
    border: 1px solid var(--reader-border, var(--theme-border, #d1d5db));
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.kl-comment-composer__cancel:hover:not(:disabled),
.kl-comment-composer__btn--secondary:hover:not(:disabled) {
    background-color: var(--reader-surface-soft, var(--theme-surface-soft, rgba(0, 0, 0, 0.05)));
}

.kl-comment-composer__cancel:disabled,
.kl-comment-composer__btn--secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.kl-comment-composer__cancel:focus-visible,
.kl-comment-composer__btn--secondary:focus-visible {
    outline: 2px solid var(--reader-primary, var(--theme-primary, #2563eb));
    outline-offset: 2px;
}

/* =========================================================
   7. SHARED REPLIES THREAD GUTTER (.kl-comment-replies)
   ========================================================= */

.kl-comment-replies {
    margin-top: 0.85rem;
    margin-left: 0;
    padding-left: 1rem;
    border-left: 2px solid var(--reader-border, var(--theme-border, var(--border-color, #e5e7eb)));
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

/* =========================================================
   8. SHARED SORT DROPDOWN (.kl-sort-dropdown)
   ========================================================= */

.kl-sort-dropdown {
    position: relative;
    display: inline-block;
    margin-bottom: 0.75rem;
}

.kl-sort-dropdown__trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.25;
    border-radius: 6px;
    border: 1px solid var(--reader-border, var(--theme-border, rgba(128, 128, 128, 0.25)));
    background: var(--reader-surface, var(--theme-surface, transparent));
    color: var(--reader-muted, var(--theme-muted, #6c757d));
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.kl-sort-dropdown__trigger:hover {
    background-color: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.08)));
    color: var(--reader-text, var(--theme-text, #212529));
}

.kl-sort-dropdown__trigger[aria-expanded="true"] {
    border-color: var(--theme-primary, #0d6efd);
    color: var(--reader-text, var(--theme-text, #212529));
}

.kl-sort-dropdown__chevron {
    font-size: 0.6875rem;
    transition: transform 0.2s ease;
}

.kl-sort-dropdown__trigger[aria-expanded="true"] .kl-sort-dropdown__chevron {
    transform: rotate(180deg);
}

.kl-sort-dropdown__menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 130px;
    background: var(--reader-surface, var(--theme-surface, #ffffff));
    border: 1px solid var(--reader-border, var(--theme-border, rgba(0, 0, 0, 0.15)));
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--theme-shadow, rgba(0, 0, 0, 0.12));
    padding: 0.25rem 0;
    z-index: 1050;
    display: flex;
    flex-direction: column;
}

.kl-sort-dropdown__menu[hidden] {
    display: none !important;
}

.kl-sort-dropdown__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: normal;
    color: var(--reader-text, var(--theme-text, #212529));
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.kl-sort-dropdown__item:hover,
.kl-sort-dropdown__item:focus {
    background-color: var(--reader-surface-soft, var(--theme-surface-soft, rgba(128, 128, 128, 0.08)));
    outline: none;
}

.kl-sort-dropdown__check {
    font-size: 0.75rem;
    width: 14px;
    color: var(--theme-primary, #0d6efd);
    visibility: hidden;
}

.kl-sort-dropdown__item.is-selected .kl-sort-dropdown__check,
.kl-sort-dropdown__item[aria-checked="true"] .kl-sort-dropdown__check {
    visibility: visible;
}

.kl-sort-dropdown__item.is-selected,
.kl-sort-dropdown__item[aria-checked="true"] {
    font-weight: 600;
    color: var(--theme-primary, #0d6efd);
}

.kl-sort-dropdown__text {
    flex: 1;
}