* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft Yahei', 'Arial', sans-serif;
}

:root {
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --secondary: #8b5cf6;
    --text-main: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-main: #ffffff;
    --bg-light: #f9fafb;
    --bg-hover: #f0f9ff;
    --border-light: #e5e7eb;
    --border: #d1d5db;
    --card-shadow: 0 4px 20px rgba(0,0,0,0.08);
    --btn-shadow: 0 4px 12px rgba(30, 64, 175, 0.15);
    --gradient-primary: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
}

body {
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.4;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 140px;
    box-sizing: border-box;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 30px 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

h1 {
    text-align: center;
    color: var(--text-main);
    margin-bottom: 30px;
    font-weight: 800;
    font-size: 42px;
    letter-spacing: 0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-light);
}

.search-filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    align-items: center;
    margin-bottom: 30px;
    padding: 25px;
    background-color: var(--bg-main);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-light);
}

#searchInput {
    flex: 1;
    min-width: 380px;
    padding: 18px 22px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    background-color: var(--bg-main);
    color: var(--text-main);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

#searchInput:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.12);
}

/* 排序按钮美化，与筛选标签风格一致 */
#sortButton {
    flex: 0 0 auto;
    margin-left: 12px;
    padding: 12px 18px;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    background-color: var(--bg-main);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    transition: all 0.2s ease;
}

#sortButton:hover {
    background-color: var(--bg-hover);
    border-color: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}

#sortButton:active { transform: translateY(0); }
#sortButton:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(30,64,175,0.12);
    border-color: var(--primary);
}

/* 导入/导出 按钮样式，保持与排序按钮一致 */
.export-btn, .import-btn {
    flex: 0 0 auto;
    margin-left: 8px;
    padding: 12px 18px;
    border-radius: 12px;
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--btn-shadow);
    transition: all 0.2s ease;
}
.export-btn:hover, .import-btn:hover {
    transform: translateY(-2px);
}
.export-btn:focus, .import-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(30,64,175,0.12);
    border-color: var(--primary);
}

.difficulty-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    font-size: 14px;
    color: var(--text-main);
}

.difficulty-filter span {
    font-weight: 600;
    margin-right: 12px;
    color: var(--text-secondary);
    font-size: 15px;
}

.difficulty-filter input[type="radio"] {
    display: none;
}

.difficulty-filter label {
    cursor: pointer;
    padding: 12px 22px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    background-color: var(--bg-main);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.25s ease;
    white-space: nowrap;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.difficulty-filter label:hover {
    background-color: var(--bg-hover);
    border-color: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}

.difficulty-filter input[type="radio"]:checked + label {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: var(--btn-shadow);
    font-weight: 700;
}

.song-table-wrapper {
    height: calc(100vh - 320px);
    /* 允许内部元素溢出显示，避免等级被外层裁切 */
    overflow: visible;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
    background-color: var(--bg-main);
}

.song-table {
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-main);
    /* 拉大表格整体最小宽度，保证列不会被压缩遮挡 */
    min-width: 1700px;
}

.header-row {
    background-color: var(--bg-light);
    color: var(--text-main);
    font-weight: 700;
    font-size: 15px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-light);
}

.ong-list, .song-list {
    flex: 1;
    overflow-y: auto;
    /* 允许横向滚动以查看放大的表格 */
    overflow-x: auto;
}

.song-row {
    display: flex;
    border-bottom: 1px solid var(--border-light);
    transition: all 0.25s ease;
    align-items: center;
    height: 85px;
}

.song-row:last-child {
    border-bottom: none;
}

.song-row:not(.header-row):hover {
    background-color: var(--bg-hover);
}

.col {
    padding: 14px 18px;
    display: flex;
    align-items: center;
    /* 单行显示，超出用省略号，不换行 */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.col.title { 
    flex: 2;
    font-weight: 700;
    font-size: 17px;
    color: var(--text-main);
}
.col.artist { 
    flex: 0.6;
    color: var(--text-secondary);
    font-size: 14px;
}
.col.bpm { 
    flex: 0.25;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}
.col.diff-info { 
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
}
.col.diff-info .diff-name {
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.col.diff-info .constant-container {
    display: flex;
    align-items: baseline;
    gap: 6px;
}
.col.diff-info .constant-label {
    color: var(--text-light);
    font-size: 12px;
}
.col.diff-info .constant-value {
    color: var(--primary);
    font-weight: 800;
    font-size: 24px;
    line-height: 1;
    letter-spacing: 0.5px;
}
.col.score-ptt { 
    flex: 2.8;
    display: flex;
    align-items: center;
    gap: 15px;
    padding-right: 20px;
    min-width: 0;
    /* 允许内部的等级/ptt元素显示，不被父列裁切 */
    overflow: visible;
}

.score-input {
    width: 160px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.25s ease;
    color: var(--text-main);
    background-color: var(--bg-light);
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}
.score-input:focus {
    border-color: var(--primary);
    background-color: var(--bg-main);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.12);
}

.result {
    display: flex;
    flex-direction: row;
    gap: 15px;
    font-size: 14px;
    align-items: center;
    flex: 1;
    justify-content: space-between;
    min-width: 0;
}
.ptt-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    /* 保证 PTT 区域有固定最小宽度，便于始终可见 */
    flex: 0 0 120px;
    min-width: 120px;
    position: relative;
    z-index: 5;
}
.ptt-value {
    color: var(--text-secondary);
    font-weight: 800;
    font-size: 22px;
    letter-spacing: 0.5px;
    display: inline-block;
    /* 单行显示 PTT，溢出使用省略号（但我们为 PTT 区域保留最小宽度，通常不会裁切） */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}
.ptt-value.has-score {
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.ptt-label {
    color: var(--text-light);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
}
.rank-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex-shrink: 0;
}
.rank-label {
    color: var(--text-light);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
}
.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 1px;
    min-width: 90px;
    max-width: 120px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    /* 单行显示等级，超出时用省略号 */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    position: relative;
    z-index: 20;
}
.rank-badge.no-score {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    color: var(--text-secondary);
    border-color: rgba(156, 163, 175, 0.4);
    box-shadow: 0 4px 12px rgba(156, 163, 175, 0.2);
}
.rank-badge.ex-plus {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.4);
}
.rank-badge.ex {
    background: linear-gradient(135deg, #dbeafe 0%, #93c5fd 100%);
    color: #1e40af;
    border-color: rgba(30, 64, 175, 0.5);
    box-shadow: 0 6px 16px rgba(30, 64, 175, 0.3);
}
.rank-badge.aa {
    background: linear-gradient(135deg, #d1fae5 0%, #86efac 100%);
    color: #065f46;
    border-color: rgba(16, 185, 129, 0.5);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}
.rank-badge.a {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.3);
}
.rank-badge.b {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    color: #374151;
    border-color: rgba(156, 163, 175, 0.5);
    box-shadow: 0 6px 16px rgba(156, 163, 175, 0.3);
}
.rank-badge.c {
    background: linear-gradient(135deg, #f5f5f5 0%, #e5e5e5 100%);
    color: #6b7280;
    border-color: rgba(209, 213, 219, 0.5);
    box-shadow: 0 6px 16px rgba(209, 213, 219, 0.3);
}
.rank-badge.d {
    background: linear-gradient(135deg, #fca5a5 0%, #f87171 100%);
    color: #7f1d1d;
    border-color: rgba(239, 68, 68, 0.5);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.3);
}

.no-result {
    padding: 60px;
    text-align: center;
    color: var(--text-light);
    font-size: 16px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.total-ptt-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 25px;
    background: var(--bg-light);
    z-index: 100;
    border-top: 2px solid var(--border-light);
}

.total-ptt-card {
    background: var(--gradient-primary);
    border-radius: 18px;
    box-shadow: 0 10px 40px rgba(30, 64, 175, 0.3);
    padding: 30px 60px;
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.total-ptt-title {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 1px;
}

.total-ptt-value {
    font-size: 56px;
    font-weight: 800;
    color: white;
    margin-bottom: 8px;
    letter-spacing: 2px;
    text-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.total-ptt-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 600;
}

.song-list::-webkit-scrollbar {
    width: 12px;
}
.song-list::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 6px;
}
.song-list::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 6px;
    transition: background 0.2s ease;
}
.song-list::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

@media (max-width: 1200px) {
    .song-table-wrapper {
        height: calc(100vh - 300px);
    }
    .song-row {
        height: 80px;
    }
    .col.title {
        font-size: 16px;
    }
    .col.diff-info .constant-value {
        font-size: 22px;
    }
    .ptt-value {
        font-size: 20px;
    }
    .rank-badge {
        font-size: 16px;
        padding: 9px 14px;
        min-width: 85px;
        max-width: 110px;
    }
    .total-ptt-card {
        padding: 25px 50px;
    }
    .total-ptt-value {
        font-size: 52px;
    }
}

@media (max-width: 992px) {
    .container {
        padding: 25px 20px;
    }
    h1 {
        font-size: 36px;
        margin-bottom: 25px;
    }
    .search-filter-container {
        gap: 20px;
        padding: 22px;
    }
    #searchInput {
        min-width: 320px;
        padding: 16px 20px;
    }
    .song-table-wrapper {
        height: calc(100vh - 280px);
    }
    .col.score-ptt {
        flex: 3;
    }
}

@media (max-width: 768px) {
    body {
        padding-bottom: 130px;
    }
    .container {
        padding: 20px 15px;
    }
    h1 {
        font-size: 32px;
        margin-bottom: 20px;
    }
    .search-filter-container {
        flex-direction: column;
        align-items: stretch;
        gap: 18px;
        padding: 20px;
    }
    #searchInput {
        min-width: unset;
        padding: 16px 18px;
    }
    .difficulty-filter {
        justify-content: center;
        gap: 10px;
    }
    .difficulty-filter label {
        padding: 10px 18px;
        font-size: 13px;
    }
    .song-table-wrapper {
        height: calc(100vh - 260px);
    }
    .song-row {
        height: auto;
        min-height: 100px;
        flex-wrap: wrap;
        align-items: flex-start;
        padding: 14px 0;
    }
    .col {
        flex: 100% !important;
        padding: 8px 16px;
    }
    .header-row {
        display: none;
    }
    .col.title {
        font-size: 18px;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 10px;
        margin-bottom: 10px;
    }
    .col.artist, .col.bpm {
        display: inline-block;
        padding: 0 12px 0 0;
        font-size: 14px;
    }
    .col.diff-info {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 12px;
        margin-bottom: 12px;
    }
    .col.diff-info .constant-value {
        font-size: 24px;
    }
    .col.score-ptt {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
        padding: 0 16px;
    }
    .score-input {
        width: 100%;
        padding: 14px;
    }
    .result {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        width: 100%;
        min-width: unset;
    }
    .ptt-container, .rank-container {
        min-width: unset;
        width: 100%;
    }
    .ptt-value {
        font-size: 22px;
    }
    .rank-badge {
        padding: 10px 12px;
        font-size: 18px;
        min-width: 100%;
        max-width: 100%;
        border-radius: 18px;
    }
    .total-ptt-container {
        padding: 20px;
    }
    .total-ptt-card {
        width: 100%;
        border-radius: 16px;
        padding: 25px 40px;
    }
    .total-ptt-value {
        font-size: 48px;
    }
    /* 移动端使排序按钮占满行并取消左间距 */
    #sortButton {
        width: 100%;
        margin-left: 0;
        padding: 12px 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px 10px;
    }
    h1 {
        font-size: 28px;
        margin-bottom: 15px;
    }
    .search-filter-container {
        padding: 18px;
    }
    #searchInput {
        padding: 14px 16px;
    }
    .difficulty-filter {
        gap: 8px;
    }
    .difficulty-filter label {
        padding: 8px 14px;
        font-size: 12px;
    }
    .song-table-wrapper {
        height: calc(100vh - 240px);
    }
    .total-ptt-card {
        padding: 20px 30px;
    }
    .total-ptt-value {
        font-size: 44px;
    }
}