/* ============================================
   组件样式 - 英语单词对战游戏
   ============================================ */

/* 徽章组件 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: bold;
    border-radius: 20px;
    text-transform: uppercase;
}

.badge-primary {
    background: var(--color-primary);
    color: var(--color-text);
}

.badge-success {
    background: var(--color-success);
    color: var(--color-bg-dark);
}

.badge-error {
    background: var(--color-error);
    color: var(--color-text);
}

.badge-warning {
    background: var(--color-warning);
    color: var(--color-bg-dark);
}

/* 卡片组件 */
.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition-normal);
}

.card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}

.card-header {
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.card-body {
    color: var(--color-text-dim);
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg-darker);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-fill.success {
    background: linear-gradient(90deg, var(--color-success), var(--color-secondary));
}

.progress-fill.warning {
    background: linear-gradient(90deg, var(--color-warning), var(--color-error));
}

/* 工具提示 */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 1rem;
    background: var(--color-bg-darker);
    color: var(--color-text);
    font-size: 0.875rem;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 100;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* 加载动画 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-dots {
    display: flex;
    gap: 0.5rem;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: bounce 0.6s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.1s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.2s;
}

/* 分隔线 */
.divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--color-border) 20%, 
        var(--color-border) 80%, 
        transparent
    );
    margin: 2rem 0;
}

.divider-vertical {
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, 
        transparent, 
        var(--color-border) 20%, 
        var(--color-border) 80%, 
        transparent
    );
}

/* 图标框 */
.icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    font-size: 1.5rem;
}

.icon-box.primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.icon-box.success {
    background: var(--color-success);
    border-color: var(--color-success);
}

.icon-box.error {
    background: var(--color-error);
    border-color: var(--color-error);
}

/* 输入框 */
.input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg-darker);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.3);
}

.input::placeholder {
    color: var(--color-text-dim);
}

/* 标签页 */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1rem;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--color-text-dim);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.tab:hover {
    color: var(--color-text);
}

.tab.active {
    color: var(--color-primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 列表组件 */
.list {
    list-style: none;
}

.list-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--color-card);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.list-item:hover {
    background: rgba(139, 92, 246, 0.1);
}

.list-item-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-darker);
    border-radius: 50%;
    margin-right: 1rem;
}

.list-item-content {
    flex: 1;
}

.list-item-title {
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.list-item-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-dim);
}

/* 开关组件 */
.switch {
    position: relative;
    width: 50px;
    height: 26px;
    background: var(--color-bg-darker);
    border-radius: 13px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.switch.active {
    background: var(--color-primary);
}

.switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: var(--color-text);
    border-radius: 50%;
    transition: var(--transition-fast);
}

.switch.active::after {
    left: 27px;
}

/* 徽章数字 */
.badge-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--color-error);
    color: var(--color-text);
    font-size: 0.75rem;
    font-weight: bold;
    border-radius: 10px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-dim);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.empty-state-desc {
    font-size: 0.875rem;
}

/* 通知组件 */
.notification {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 1rem 1.5rem;
    background: var(--color-card);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    z-index: 300;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left-color: var(--color-success);
}

.notification.error {
    border-left-color: var(--color-error);
}

.notification.warning {
    border-left-color: var(--color-warning);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* 选中样式 */
::selection {
    background: var(--color-primary);
    color: var(--color-text);
}