/*!
 * blog-features.css
 * Custom blog features: search overlay / code block enhancement / post like / back-to-top
 * Extracted from _includes/footer.html inline styles for browser caching.
 */

/* ===== Search 搜索弹窗 ===== */
#search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 80px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

#search-container {
    background: white;
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#search-header {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 2px solid #e0e0e0;
}

#search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 18px;
    padding: 10px;
    color: #333;
}

#search-input::placeholder {
    color: #999;
}

#search-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #666;
    cursor: pointer;
    padding: 5px 10px;
    transition: color 0.3s;
}

#search-close:hover {
    color: #0085a1;
}

#results-container {
    overflow-y: auto;
    padding: 20px;
    max-height: calc(80vh - 80px);
}

.search-result {
    padding: 15px;
    margin-bottom: 15px;
    border-left: 3px solid #0085a1;
    background: #f9f9f9;
    border-radius: 5px;
    transition: all 0.3s;
}

.search-result:hover {
    background: #f0f0f0;
    transform: translateX(5px);
}

.search-result a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.search-result-title {
    font-size: 18px;
    font-weight: bold;
    color: #0085a1;
    margin-bottom: 8px;
}

.search-result-date {
    font-size: 14px;
    color: #999;
    margin-bottom: 8px;
}

.search-result-tags {
    font-size: 13px;
    color: #666;
}

.search-result-tags .tag {
    display: inline-block;
    background: #e0e0e0;
    padding: 3px 8px;
    margin-right: 5px;
    border-radius: 3px;
}

.search-result-content {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-top: 8px;
}

/* 搜索关键词高亮 */
.search-result-content mark {
    background: #ffeb3b;
    color: #333;
    font-weight: bold;
    padding: 2px 4px;
    border-radius: 2px;
}

.search-no-results {
    text-align: center;
    padding: 40px;
    color: #999;
    font-size: 16px;
}

.search-no-results i {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
    color: #ccc;
}

/* 移动端适配 */
@media (max-width: 768px) {
    #search-container {
        width: 95%;
        max-height: 90vh;
    }

    #search-input {
        font-size: 16px;
    }
}

/* 自定义滚动条 */
#results-container::-webkit-scrollbar {
    width: 8px;
}

#results-container::-webkit-scrollbar-track {
    background: #f1f1f1;
}

#results-container::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

#results-container::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ===== 代码块优化 ===== */
/* 代码块容器 */
.code-block-wrapper {
    position: relative;
    margin: 20px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 代码块头部 */
.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(90deg, #2d2d2d 0%, #1e1e1e 100%);
    padding: 10px 15px;
    border-bottom: 1px solid #404040;
}

/* 语言标识 */
.code-language {
    color: #61dafb;
    font-size: 13px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: 'Courier New', monospace;
}

.code-language i {
    margin-right: 5px;
    color: #98c379;
}

/* 复制按钮 */
.copy-code-button {
    background: #4a4a4a;
    border: 1px solid #5a5a5a;
    color: #e0e0e0;
    padding: 6px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.copy-code-button:hover {
    background: #0085a1;
    border-color: #0085a1;
    transform: translateY(-2px);
}

.copy-code-button.copied {
    background: #28a745;
    border-color: #28a745;
}

.copy-code-button i {
    font-size: 13px;
}

/* 优化代码块本身 */
.code-block-wrapper pre {
    margin: 0 !important;
    border-radius: 0 !important;
    border: none !important;
}

.code-block-wrapper pre code {
    display: block;
    padding: 20px !important;
    font-size: 14px;
    line-height: 1.6;
    font-family: 'Courier New', Consolas, Monaco, monospace;
}

/* 行号样式（如果使用了行号插件） */
.code-block-wrapper .lineno {
    color: #5a5a5a;
    padding-right: 15px;
    border-right: 1px solid #404040;
    margin-right: 15px;
    user-select: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .code-block-header {
        padding: 8px 12px;
    }

    .code-language {
        font-size: 11px;
    }

    .copy-code-button {
        padding: 5px 10px;
        font-size: 11px;
    }

    .code-block-wrapper pre code {
        font-size: 12px;
        padding: 15px !important;
    }
}

/* 代码块滚动条优化 */
.code-block-wrapper pre::-webkit-scrollbar {
    height: 8px;
}

.code-block-wrapper pre::-webkit-scrollbar-track {
    background: #2d2d2d;
}

.code-block-wrapper pre::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 4px;
}

.code-block-wrapper pre::-webkit-scrollbar-thumb:hover {
    background: #777;
}

/* ===== 点赞功能 ===== */
.post-like-container {
    margin: 40px 0;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #e0e0e0;
    border-bottom: 1px solid #e0e0e0;
}

.like-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.like-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.like-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.like-button:active {
    transform: scale(0.95);
}

.like-button i {
    font-size: 20px;
    transition: all 0.3s ease;
}

.like-button .like-text {
    font-weight: bold;
    letter-spacing: 0.5px;
}

/* 已点赞状态 */
.like-button.liked {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
}

.like-button.liked:hover {
    box-shadow: 0 6px 20px rgba(245, 87, 108, 0.6);
}

.like-button.liked i {
    animation: heartBeat 0.5s ease;
}

/* 点赞动画 */
@keyframes heartBeat {
    0% { transform: scale(1); }
    25% { transform: scale(1.3); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.25); }
    100% { transform: scale(1); }
}

/* 粒子动画 */
.like-button.animating::before {
    content: '❤️';
    position: absolute;
    font-size: 20px;
    animation: particleAnimation 1s ease-out;
    pointer-events: none;
}

@keyframes particleAnimation {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px) scale(1.5);
    }
}

/* 点赞数显示 */
.like-count-wrapper {
    display: flex;
    align-items: baseline;
    gap: 5px;
    color: #666;
    font-size: 16px;
}

.like-count {
    font-size: 28px;
    font-weight: bold;
    color: #0085a1;
    font-family: 'Arial', sans-serif;
}

.like-label {
    color: #999;
}

/* 数字变化动画 */
.like-count.increment {
    animation: countIncrement 0.5s ease;
}

@keyframes countIncrement {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); color: #f5576c; }
    100% { transform: scale(1); }
}

/* 涟漪效果 */
.like-button::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0;
    transform: scale(0);
    transition: transform 0.5s, opacity 1s;
}

.like-button:active::after {
    transform: scale(3);
    opacity: 1;
    transition: 0s;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .like-button {
        padding: 12px 30px;
        font-size: 16px;
    }

    .like-count {
        font-size: 24px;
    }
}

/* 加载状态 */
.like-button.loading {
    pointer-events: none;
    opacity: 0.7;
}

.like-button.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* ===== 返回顶部按钮 ===== */
.back-to-top-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    z-index: 9998;
}

.back-to-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.back-to-top-btn:active {
    transform: translateY(-2px);
}

.back-to-top-btn.show {
    display: flex;
    animation: fadeInUp 0.5s ease;
}

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

/* 滚动进度环 */
.back-to-top-btn::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #fff;
    opacity: 0.3;
    transition: transform 0.3s ease;
}

.back-to-top-btn:hover::before {
    transform: rotate(180deg);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .back-to-top-btn {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}