/* 全局样式 */
:root {
    --primary-color: #1da1f2;
    --primary-dark: #0d8ecf;
    --secondary-color: #657786;
    --light-color: #f5f8fa;
    --dark-color: #14171a;
    --danger-color: #e0245e;
    --success-color: #17bf63;
    --warning-color: #ffad1f;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f7f9fa;
    color: var(--dark-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 2.5rem;
}

header p {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* 主要内容区域 */
main {
    display: grid;
    grid-gap: 30px;
}

section {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    transition: var(--transition);
}

section h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 输入区域 */
.input-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    resize: vertical;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(29, 161, 242, 0.2);
}

.button-group {
    display: flex;
    gap: 10px;
}

button {
    cursor: pointer;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: bold;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
}

.primary-button:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.secondary-button {
    background-color: var(--light-color);
    color: var(--secondary-color);
}

.secondary-button:hover:not(:disabled) {
    background-color: #e1e8ed;
}

/* 格式化区域 */
.format-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.format-container input {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.format-container input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(29, 161, 242, 0.2);
}

.format-help {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* 结果区域 */
.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
    min-height: 200px;
}

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    padding: 50px 0;
    text-align: center;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.media-item {
    border: 1px solid #e1e8ed;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.media-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.media-checkbox {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 5;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.media-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.media-preview {
    height: 200px;
    background-color: #f5f8fa;
    position: relative;
    overflow: hidden;
}

.media-preview img, .media-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-info {
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-grow: 1;
}

.media-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: bold;
}

.author-id {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.media-text {
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.media-meta {
    display: flex;
    justify-content: space-between;
    color: var(--secondary-color);
    font-size: 0.85rem;
    margin-top: auto;
}

.media-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.download-button {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.view-original {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px 12px;
    background-color: var(--light-color);
    color: var(--secondary-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: bold;
    transition: var(--transition);
}

.view-original:hover {
    background-color: #e1e8ed;
}

.download-all-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    gap: 15px;
}

.select-all-container {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.select-all-container input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

#download-all {
    padding: 12px 25px;
}

/* 加载提示 */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.hidden {
    display: none !important;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px 0;
    color: var(--secondary-color);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .results-container {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    header h1 {
        font-size: 2rem;
    }
}