/* ============================================================
 * Messages Center — 独立消息中心页面
 * ============================================================ */

.messages-center {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 24px;
    min-height: 60vh;
    padding-top: 24px;
    padding-bottom: 48px;
}

/* ---- 左侧导航 ---- */
.messages-center__nav {
    position: sticky;
    top: calc(var(--nav-height, 60px) + 24px);
    align-self: start;
    background: var(--surface-card, #fff);
    border-radius: 12px;
    padding: 16px 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.messages-nav__list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.messages-nav__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--color-ink);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
}

.messages-nav__item:hover {
    background: var(--surface-hover, rgba(0, 0, 0, 0.04));
}

.messages-nav__item.is-active {
    background: var(--color-primary-light, rgba(59, 130, 246, 0.08));
    color: var(--color-primary, #3b82f6);
    font-weight: 600;
}

.messages-nav__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: 10px;
    background: var(--color-primary, #3b82f6);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
}

.messages-nav__badge:empty,
.messages-nav__badge[data-count="0"] {
    display: none;
}

.messages-nav__actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-line);
}

.messages-nav__action-btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    background: var(--surface-hover, rgba(0, 0, 0, 0.04));
    color: var(--color-ink-3, #666);
    font-size: 13px;
    cursor: pointer;
    text-align: center;
    transition: background 0.15s;
}

.messages-nav__action-btn:hover {
    background: var(--surface-active, rgba(0, 0, 0, 0.08));
}

/* ---- 右侧内容 ---- */
.messages-center__content {
    min-width: 0;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--surface-card, #fff);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.message-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    background: var(--surface-card, #fff);
    border-bottom: 1px solid var(--color-border-light, #f3f4f6);
    transition: background 0.15s;
}

.message-item:last-child {
    border-bottom: none;
}

.message-item:hover {
    background: var(--surface-hover, rgba(0, 0, 0, 0.02));
}

.message-item.is-unread {
    border-left: 3px solid var(--color-primary, #3b82f6);
}

.message-item.is-unread .message-item__title {
    font-weight: 600;
}

.message-item__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
    color: var(--color-primary, #3b82f6);
    font-size: 14px;
}

.message-item__body {
    flex: 1;
    min-width: 0;
}

.message-item__title {
    font-size: 14px;
    color: var(--color-ink);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-item__new-badge {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    background: var(--color-danger, #ef4444);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    line-height: 1.4;
}

.message-item__desc {
    font-size: 13px;
    color: var(--color-ink-3, #666);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.message-item__time {
    font-size: 12px;
    color: var(--color-ink-4, #999);
}

.message-item__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.message-item__action-btn {
    padding: 4px 10px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--color-ink-3, #666);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.message-item__action-btn:hover {
    background: var(--surface-hover, rgba(0, 0, 0, 0.06));
    color: var(--color-primary, #3b82f6);
}

.message-item__action-btn--danger:hover {
    color: var(--color-danger, #ef4444);
}

/* ---- 空状态 ---- */
.messages-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 64px 24px;
    background: var(--surface-card, #fff);
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.messages-empty__icon {
    font-size: 48px;
    color: var(--color-ink-4, #ccc);
    margin-bottom: 16px;
}

.messages-empty__text {
    font-size: 14px;
    color: var(--color-ink-3, #666);
}

.messages-empty__hint {
    margin-top: 4px;
    font-size: 12px;
    color: var(--color-ink-4, #999);
}

/* ---- 分页 ---- */
.messages-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

/* ---- 响应式 ---- */
@media (max-width: 767px) {
    .messages-center {
        grid-template-columns: 1fr;
        gap: 16px;
        padding-top: 16px;
    }

    .messages-center__nav {
        position: static;
        padding: 12px;
        border-radius: 8px;
    }

    .messages-nav__list {
        display: flex;
        overflow-x: auto;
        gap: 4px;
        scrollbar-width: none;
    }

    .messages-nav__list::-webkit-scrollbar {
        display: none;
    }

    .messages-nav__item {
        white-space: nowrap;
        padding: 8px 12px;
        font-size: 13px;
        border-radius: 20px;
    }

    .messages-nav__actions {
        flex-direction: row;
        margin-top: 12px;
        padding-top: 10px;
    }

    .message-item {
        padding: 12px 14px;
    }

    .message-item__actions {
        flex-direction: column;
        gap: 4px;
    }
}

/* ---- 暗色模式 ---- */
html.dark .messages-center__nav,
html.dark .messages-center__nav {
    background: var(--surface-1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

html.dark .messages-nav__item:hover,
html.dark .messages-nav__item:hover {
    background: rgba(255, 255, 255, 0.05);
}

html.dark .messages-nav__item.is-active,
html.dark .messages-nav__item.is-active {
    background: var(--color-primary-soft, rgba(240, 68, 148, 0.16));
}

html.dark .messages-nav__action-btn,
html.dark .messages-nav__action-btn {
    background: var(--surface-2);
    color: var(--color-ink-3);
}

html.dark .messages-nav__action-btn:hover,
html.dark .messages-nav__action-btn:hover {
    background: var(--surface-3);
}

html.dark .messages-list,
html.dark .messages-list {
    background: var(--surface-1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

html.dark .message-item,
html.dark .message-item {
    background: var(--surface-1);
    border-bottom-color: var(--color-line);
}

html.dark .message-item:hover,
html.dark .message-item:hover {
    background: var(--surface-2);
}

html.dark .message-item__icon,
html.dark .message-item__icon {
    background: var(--color-primary-soft, rgba(240, 68, 148, 0.16));
}

html.dark .message-item__action-btn:hover,
html.dark .message-item__action-btn:hover {
    background: var(--surface-3);
}

html.dark .messages-empty,
html.dark .messages-empty {
    background: var(--surface-1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

html.dark .messages-nav__actions,
html.dark .messages-nav__actions {
    border-top-color: var(--color-line);
}

/* Page header */
.messages-center__header {
    margin: 8px 0 16px;
}
.messages-center__title {
    margin: 0 0 6px;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-ink, #1f2937);
}
.messages-center__subtitle {
    margin: 0;
    font-size: 14px;
    color: var(--color-ink-3, #6b7280);
}

.messages-center--disabled {
    display: block;
    min-height: 40vh;
}

.message-item__new-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    border-radius: 999px;
    background: var(--color-primary, #3b82f6);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    vertical-align: middle;
}