/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(76, 175, 80, 0.1);
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4CAF50, #81C784);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    from { filter: drop-shadow(0 0 5px rgba(76, 175, 80, 0.3)); }
    to { filter: drop-shadow(0 0 15px rgba(76, 175, 80, 0.6)); }
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    opacity: 0.8;
}

/* 榜单信息样式 */
.rank-info {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 6px 25px rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

.rank-header {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.rank-cover {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

.rank-details {
    flex: 1;
}

.rank-name {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
}

.rank-description {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.rank-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.update-time, .update-frequency {
    background: linear-gradient(135deg, #E8F5E8, #C8E6C9);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #2E7D32;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

/* 控制区域样式 */
.controls {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 6px 25px rgba(76, 175, 80, 0.1);
}

.input-group {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.input-group label {
    font-weight: 600;
    color: #2c3e50;
    min-width: 80px;
}

#rankId {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

#rankId:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.load-btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #4CAF50, #66BB6A);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.load-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.load-btn:active {
    transform: translateY(0);
}

.load-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    margin-bottom: 30px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #E0E0E0;
    border-top: 4px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

/* 错误提示 */
.error {
    text-align: center;
    padding: 30px;
    background: rgba(255, 245, 245, 0.95);
    border: 2px solid #ffcdd2;
    border-radius: 15px;
    margin-bottom: 30px;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.error-message {
    color: #c62828;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.retry-btn {
    padding: 10px 20px;
    background: #f44336;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    background: #d32f2f;
    transform: translateY(-1px);
}

/* 歌曲列表样式 */
.song-list {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 6px 25px rgba(76, 175, 80, 0.1);
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #E8F5E8;
}

.list-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    font-weight: 600;
}

.song-count {
    background: linear-gradient(135deg, #4CAF50, #66BB6A);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* 歌曲项样式 */
.song-item {
    display: flex;
    align-items: center;
    padding: 15px;
    margin-bottom: 12px;
    background: rgba(248, 255, 248, 0.8);
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid rgba(76, 175, 80, 0.1);
    cursor: pointer;
}

.song-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.15);
    background: rgba(232, 245, 232, 0.9);
}

.song-rank {
    font-size: 1.2rem;
    font-weight: 700;
    color: #4CAF50;
    min-width: 40px;
    text-align: center;
}

.song-rank.top3 {
    background: linear-gradient(135deg, #FFD700, #FFA000);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.song-info {
    flex: 1;
    margin-left: 15px;
}

.song-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.song-artist {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 3px;
}

.song-album {
    color: #888;
    font-size: 0.85rem;
}

.song-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.song-duration {
    color: #666;
    font-size: 0.9rem;
}

.song-popularity {
    background: linear-gradient(135deg, #4CAF50, #66BB6A);
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* 返回按钮 */
.back-to-list {
    text-align: center;
    margin: 30px 0;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #81C784, #A5D6A7);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(129, 199, 132, 0.3);
}

.back-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(129, 199, 132, 0.4);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    margin-top: 40px;
    color: #666;
    backdrop-filter: blur(10px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .rank-header {
        flex-direction: column;
        text-align: center;
    }
    
    .rank-cover {
        width: 100px;
        height: 100px;
        margin: 0 auto 15px;
    }
    
    .input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .input-group label {
        min-width: auto;
        margin-bottom: 5px;
    }
    
    #rankId {
        min-width: auto;
        margin-bottom: 10px;
    }
    
    .song-item {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .song-info {
        margin-left: 0;
    }
    
    .song-meta {
        align-items: center;
        flex-direction: row;
        justify-content: center;
    }
    
    .list-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.8rem;
    }
    
    .header {
        padding: 30px 15px;
    }
    
    .rank-info, .controls, .song-list {
        padding: 20px;
    }
    
    .song-item {
        padding: 12px;
    }
}

/* 平板端适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 25px;
    }
    
    .song-item {
        padding: 18px;
    }
    
    .rank-cover {
        width: 110px;
        height: 110px;
    }
}