/* ============================================
   留言板样式 - guestbook.css
   依赖 styles.css 中的 CSS 变量
   ============================================ */

/* ---- 表单 ---- */
.gb-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 40px;
    position: relative;
}

.gb-form::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 1px;
    background: var(--gradient-border);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.gb-form:focus-within::before {
    opacity: 1;
}

.gb-form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.gb-form .form-group {
    position: relative;
    flex: 1;
}

.gb-form textarea {
    min-height: 120px;
    resize: vertical;
}

/* ---- 工具栏 ---- */
.gb-form-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.gb-toolbar-left {
    display: flex;
    align-items: center;
    gap: 4px;
}

.gb-tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gb-tool-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.gb-char-count {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ---- 提交按钮状态 ---- */
.gb-submit {
    width: 100%;
    margin-top: 16px;
    position: relative;
    overflow: hidden;
}

.gb-submit .btn-loading {
    display: none;
}

.gb-submit.loading .btn-text { display: none; }
.gb-submit.loading .btn-loading { display: flex; align-items: center; justify-content: center; }
.gb-submit.loading .btn-success { display: none; }
.gb-submit.success .btn-text { display: none; }
.gb-submit.success .btn-loading { display: none; }
.gb-submit.success .btn-success { display: flex; align-items: center; justify-content: center; }

.gb-submit .spinner {
    width: 20px;
    height: 20px;
    animation: spin 0.8s linear infinite;
}

.gb-submit .btn-success {
    display: none;
    color: #22c55e;
}

/* ---- 排序工具栏 ---- */
.gb-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.gb-sort-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-family: var(--font-sans);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    position: relative;
}

.gb-sort-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.gb-sort-btn.active {
    color: #fff;
    background: var(--gradient-primary);
    background-size: 150% 150%;
    animation: gradient-shift 3s ease infinite;
}

.gb-count {
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ---- 评论卡片 ---- */
.gb-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 200px;
}

.gb-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.3s var(--ease-out);
    animation: gb-fade-in 0.5s var(--ease-out);
}

.gb-card:hover {
    border-color: var(--border-color-hover);
    background: var(--bg-card-hover, #1a1a1f);
}

.gb-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.gb-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.gb-card-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.gb-nickname {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.gb-author-badge {
    display: inline-flex;
    align-items: center;
    padding: 1px 8px;
    font-size: 0.65rem;
    font-weight: 500;
    color: #fff;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
}

.gb-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.gb-card-body {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 12px;
    word-break: break-word;
}

.gb-card-body p {
    margin: 0 0 8px 0;
}

.gb-card-body p:last-child {
    margin-bottom: 0;
}

.gb-card-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.gb-card-body em {
    font-style: italic;
}

.gb-card-body del {
    color: var(--text-muted);
}

.gb-card-body a {
    color: var(--accent-blue);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.gb-card-body a:hover {
    border-bottom-color: var(--accent-blue);
}

.gb-card-body .gb-inline-code {
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent-blue);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.gb-card-body .gb-code-block {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin: 8px 0;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.5;
}

.gb-card-body .gb-code-block code {
    background: none;
    padding: 0;
}

.gb-card-body .gb-md-list {
    margin: 8px 0;
    padding-left: 24px;
}

.gb-card-body .gb-md-list li {
    margin: 4px 0;
}

.gb-card-body .gb-md-image {
    color: var(--text-muted);
    font-size: 0.85em;
    font-family: var(--font-mono);
}

/* ---- 操作按钮 ---- */
.gb-card-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gb-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-sans);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gb-action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.gb-action-btn.liked {
    color: #ec4899;
}

.gb-action-btn.liked:hover {
    background: rgba(236, 72, 153, 0.1);
}

.gb-delete-btn:hover {
    color: #ef4444 !important;
    background: rgba(239, 68, 68, 0.1) !important;
}

/* ---- 回复区 ---- */
.gb-replies {
    margin-top: 16px;
    padding-left: 20px;
    border-left: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.gb-reply-card {
    background: rgba(255, 255, 255, 0.02);
    border: none;
    border-radius: var(--radius-sm);
    padding: 16px;
}

.gb-reply-card:hover {
    background: rgba(255, 255, 255, 0.04);
}

.gb-reply-card .gb-avatar {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
}

.gb-show-more-replies {
    display: inline-flex;
    align-items: center;
    padding: 6px 0;
    border: none;
    background: none;
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.gb-show-more-replies:hover {
    opacity: 0.8;
}

/* ---- 回复提示 ---- */
.gb-reply-indicator {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    margin-bottom: 16px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    animation: gb-fade-in 0.3s ease;
}

.gb-reply-cancel {
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.gb-reply-cancel:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* ---- 加载更多 ---- */
.gb-load-more {
    text-align: center;
    margin-top: 32px;
}

.gb-load-more .btn {
    padding: 12px 32px;
}

/* ---- 空状态 ---- */
.gb-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    gap: 16px;
}

.gb-empty svg {
    opacity: 0.3;
}

.gb-empty p {
    font-size: 0.95rem;
}

/* ---- Skeleton Loading ---- */
.gb-skeleton-card {
    pointer-events: none;
}

.gb-skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.04) 25%,
        rgba(255, 255, 255, 0.08) 50%,
        rgba(255, 255, 255, 0.04) 75%
    );
    background-size: 200% 100%;
    animation: gb-shimmer 1.5s infinite;
    border-radius: 6px;
}

.gb-skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
}

.gb-skeleton-line {
    height: 14px;
    border-radius: 4px;
}

/* ---- Emoji Picker ---- */
.gb-emoji-picker {
    margin-top: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    animation: gb-fade-in 0.2s ease;
}

.gb-emoji-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    max-height: 200px;
    overflow-y: auto;
}

.gb-emoji-grid::-webkit-scrollbar {
    width: 4px;
}

.gb-emoji-grid::-webkit-scrollbar-track {
    background: transparent;
}

.gb-emoji-grid::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 2px;
}

.gb-emoji-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.25rem;
    transition: all 0.15s ease;
}

.gb-emoji-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: scale(1.2);
}

/* ---- Markdown 预览 ---- */
.gb-md-preview {
    margin-top: 8px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    animation: gb-fade-in 0.2s ease;
}

.gb-md-preview-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ---- 删除确认弹窗 ---- */
.gb-confirm-overlay {
    position: fixed;
    inset: 0;
    z-index: 10001;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gb-confirm-overlay.show {
    opacity: 1;
}

.gb-confirm-modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 400px;
    width: 90%;
    transform: scale(0.95) translateY(10px);
    transition: transform 0.3s var(--ease-out);
}

.gb-confirm-overlay.show .gb-confirm-modal {
    transform: scale(1) translateY(0);
}

.gb-confirm-modal h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.gb-confirm-modal p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

.gb-confirm-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.gb-confirm-actions .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
}

/* ---- 新评论动画 ---- */
.gb-new {
    animation: gb-slide-in 0.5s var(--ease-spring);
}

/* ---- 渐变动画 ---- */
@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ---- 管理员栏 ---- */
.gb-admin-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.gb-admin-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-sans);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gb-admin-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-color-hover);
    background: rgba(255, 255, 255, 0.04);
}

/* ---- Keyframes ---- */
@keyframes gb-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes gb-slide-in {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes gb-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
    .gb-form {
        padding: 24px 20px;
    }

    .gb-form-row {
        flex-direction: column;
        margin-bottom: 12px;
    }

    .gb-card {
        padding: 20px 16px;
    }

    .gb-replies {
        padding-left: 12px;
    }

    .gb-emoji-grid {
        grid-template-columns: repeat(8, 1fr);
    }

    .gb-toolbar {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .gb-form {
        padding: 20px 16px;
    }

    .gb-card-header {
        gap: 10px;
    }

    .gb-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }

    .gb-card-actions {
        flex-wrap: wrap;
        gap: 4px;
    }

    .gb-action-btn {
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .gb-emoji-grid {
        grid-template-columns: repeat(7, 1fr);
    }

    .gb-emoji-item {
        width: 32px;
        height: 32px;
        font-size: 1.1rem;
    }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    .gb-card,
    .gb-new,
    .gb-confirm-overlay,
    .gb-confirm-modal,
    .gb-reply-indicator,
    .gb-emoji-picker,
    .gb-md-preview {
        animation: none !important;
        transition: none !important;
    }

    .gb-skeleton {
        animation: none !important;
    }

    .gb-sort-btn.active {
        animation: none !important;
    }
}