/**
 * NexusTools - UI增强样式
 * 包含：快捷键提示、手势操作、骨架屏等
 */

/* ========== 快捷键帮助面板 ========== */
.shortcut-help {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.shortcut-help.active {
    opacity: 1;
    visibility: visible;
}

.shortcut-help-content {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transform: scale(0.9);
    transition: transform 0.3s;
}

.shortcut-help.active .shortcut-help-content {
    transform: scale(1);
}

.shortcut-help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
}

.shortcut-help-header h3 {
    margin: 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.shortcut-help-header h3 i {
    color: var(--neon-pink);
}

.shortcut-help-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition);
}

.shortcut-help-close:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.shortcut-help-body {
    padding: 20px 24px;
    max-height: 50vh;
    overflow-y: auto;
}

.shortcut-section {
    margin-bottom: 24px;
}

.shortcut-section:last-child {
    margin-bottom: 0;
}

.shortcut-section h4 {
    margin: 0 0 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.shortcut-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--glass-border);
}

.shortcut-list li:last-child {
    border-bottom: none;
}

.shortcut-list kbd {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--neon-pink);
    white-space: nowrap;
}

.shortcut-list span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.shortcut-help-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.shortcut-help-footer kbd {
    padding: 2px 6px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    font-size: 0.8rem;
}

/* ========== 按钮快捷键提示 ========== */
.shortcut-hint {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: 'Consolas', monospace;
    opacity: 0.7;
}

@media (max-width: 768px) {
    .shortcut-hint {
        display: none;
    }
}

/* ========== 手势操作样式 ========== */
.swipe-hint {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    padding: 16px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: var(--shadow-card);
}

.swipe-hint-left {
    right: -100px;
}

.swipe-hint-right {
    left: -100px;
}

.swipe-hint.active.swipe-hint-left {
    right: 20px;
    opacity: 1;
}

.swipe-hint.active.swipe-hint-right {
    left: 20px;
    opacity: 1;
}

.swipe-hint i {
    color: var(--neon-pink);
}

/* ========== 上下文菜单 ========== */
.context-menu {
    position: fixed;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.2s, transform 0.2s;
}

.context-menu.active {
    opacity: 1;
    transform: scale(1);
}

.context-menu-header {
    padding: 14px 18px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--glass-border);
    background: var(--bg-card);
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 18px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.context-menu-item:hover,
.context-menu-item:focus,
.context-menu-item:active {
    background: var(--bg-card);
}

.context-menu-item i {
    width: 20px;
    color: var(--neon-pink);
    text-align: center;
}

.context-menu-cancel {
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

.context-menu-cancel i {
    color: var(--text-secondary);
}

/* ========== 粘贴选项 ========== */
.paste-option {
    position: fixed;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10000;
    cursor: pointer;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s, transform 0.2s;
}

.paste-option.active {
    opacity: 1;
    transform: translateY(0);
}

.paste-option:hover,
.paste-option:active {
    background: var(--bg-card);
}

.paste-option i {
    color: var(--neon-pink);
}

/* ========== 手势引导 ========== */
.gesture-guide {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 20px;
    z-index: 10000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gesture-guide.active {
    transform: translateY(0);
}

.gesture-guide-content {
    max-width: 400px;
    margin: 0 auto;
}

.gesture-guide-content h4 {
    margin: 0 0 16px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.gesture-guide-content h4 i {
    color: var(--neon-pink);
}

.gesture-guide-content ul {
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
}

.gesture-guide-content li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.gesture-guide-content li i {
    width: 24px;
    color: var(--neon-purple);
}

.gesture-guide-close {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
}

/* ========== 加载指示器 ========== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--neon-pink);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--neon-pink);
    border-radius: 50%;
    animation: loadingDot 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes loadingDot {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ========== 页面加载进度条 ========== */
.page-loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-pink), var(--neon-purple));
    z-index: 99999;
    transition: width 0.3s ease;
}

/* ========== 内容淡入效果 ========== */
.content-loaded {
    animation: contentFadeIn 0.5s ease forwards;
}

@keyframes contentFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 触摸反馈 ========== */
@media (hover: none) and (pointer: coarse) {
    .tool-card:active,
    .category-card:active,
    .btn:active,
    .tool-btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
    
    /* 增大触摸目标 */
    .nav-link,
    .toolbar-btn {
        min-height: 48px;
        min-width: 48px;
    }
}

/* ========== 下拉刷新指示器 ========== */
.pull-to-refresh {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow-soft);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    transition: transform 0.3s;
}

.pull-to-refresh.visible {
    transform: translateX(-50%) translateY(0);
}

.pull-to-refresh i {
    color: var(--neon-pink);
}

/* ========== 响应式调整 ========== */
@media (max-width: 768px) {
    .shortcut-help-content {
        width: 95%;
        max-height: 85vh;
    }
    
    .shortcut-help-body {
        max-height: 60vh;
    }
    
    .context-menu {
        min-width: 200px;
    }
    
    .context-menu-item {
        padding: 16px 20px;
    }
}