:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --card-color: #fff;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #2980b9;
    --secondary-color: #27ae60;
    --danger-color: #c0392b;
    --warning-color: #d35400;
    --text-color: #f5f5f5;
    --bg-color: #121212;
    --card-color: #1e1e1e;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-box {
    position: relative;
    min-width: 250px;
}

.search-box input {
    width: 100%;
    padding: 8px 15px 8px 35px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background-color: var(--card-color);
    color: var(--text-color);
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    opacity: 0.7;
}

button {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

button:hover {
    opacity: 0.9;
}

button i {
    font-size: 0.9rem;
}

#loginBtn, #logoutBtn {
    background-color: var(--secondary-color);
}

#logoutBtn {
    background-color: var(--warning-color);
}

.loading, .error {
    text-align: center;
    padding: 20px;
    color: var(--primary-color);
}

.error {
    color: var(--danger-color);
}

.categories {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.category {
    background-color: var(--card-color);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px var(--shadow-color);
}

.category h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sites {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
}

.site {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.2s;
    position: relative;
    padding: 10px;
    border-radius: 8px;
    background-color: var(--bg-color);
}

.site:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.site-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 8px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary-color);
}

.site-icon img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.site-name {
    text-align: center;
    font-size: 0.9rem;
    word-break: break-word;
    width: 100%;
}

.delete-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
}

.site:hover .delete-btn {
    display: flex;
}

/* 拖拽相关样式 */
.site[draggable="true"] {
    cursor: grab;
}

.site[draggable="true"]:active {
    cursor: grabbing;
}

.site.dragging {
    opacity: 0.5;
    background-color: var(--primary-color);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--card-color);
    margin: 10% auto;
    padding: 25px;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 4px 8px var(--shadow-color);
    position: relative;
    max-height: 80vh;
    overflow-y: auto;
}

.modal h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.7;
}

.close:hover {
    opacity: 1;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

form button {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

form button:hover {
    opacity: 0.9;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .header-left, .header-right {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .search-box {
        width: 100%;
    }
    
    .header-right button {
        width: 100%;
        justify-content: center;
    }
    
    .sites {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .modal-content {
        margin: 20% auto;
    }
}