.table-responsive{overflow-x:auto}
.table-responsive table{min-width:700px}
.skeleton-row td{position:relative}
.skeleton-line{display:inline-block;height:14px;background:linear-gradient(90deg,#eee 25%,#f5f5f5 50%,#eee 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:4px;width:80%}
@keyframes shimmer {
0%{background-position:-200% 0}
100%{background-position:200% 0}
}
[data-theme="dark"] .skeleton-line{background:linear-gradient(90deg,#333 25%,#444 50%,#333 75%);background-size:200% 100%}
.updates-panel.refreshing .problems-table{animation:refreshFlash .4s ease}
@keyframes refreshFlash {
0%{border-color:var(--accent);box-shadow:0 0 8px var(--accent)}
100%{border-color:var(--border-color);box-shadow:none}
}
.problems-table{width:100%;border-collapse:collapse;margin-top:1rem;background:var(--card-bg);border-radius:4px;overflow:hidden;box-shadow:var(--shadow-sm);table-layout:fixed}
.problems-table th,.problems-table td{padding:.2rem .5rem;text-align:left;border-bottom:1px solid var(--border-color);vertical-align:middle}
.problems-table th{background:#e9ecef;font-weight:700;padding-top:.3rem;padding-bottom:.3rem}
.col-fav{width:36px}
.col-id{width:10ch;font-family:monospace;font-weight:700}
.col-name{width:auto}
.col-tags{width:auto}
.col-level{width:70px;text-align:right}
.col-solves{width:70px;text-align:right}
.show-tags .col-name{width:45%}
.show-tags .col-tags{width:45%}
.problems-table:not(.show-tags) .col-tags{width:0!important;min-width:0;padding:0!important;border:0;overflow:hidden}
.problems-table:not(.show-tags) .col-tags *{display:none}
.problem-row{cursor:pointer;transition:transform .25s cubic-bezier(.2,0,0,1),box-shadow .25s ease;position:relative;z-index:0;border-left:6px solid transparent}
.problem-row:hover{transform:translateY(-2px) scale(1.002);box-shadow:0 8px 30px #00000014 2px 8px #0000000a;z-index:1}
.problem-row:active{transform:scale(.995);transition-duration:.05s}
.problem-row.state-not_started{border-left-color:#b3d4ff}
.problem-row.state-passed{border-left-color:#4caf50}
.problem-row.state-failed{border-left-color:#e74c3c}
#appContainer .problems-table .problem-row.state-passed td:not(.difficulty-cell){background-color:#e6ffed!important}
#appContainer .problems-table .problem-row.state-failed td:not(.difficulty-cell){background-color:#ffeaea!important}
:root[data-theme="dark"] #appContainer .problems-table .problem-row.state-passed td:not(.difficulty-cell){background-color:#1a3a2a!important}
:root[data-theme="dark"] #appContainer .problems-table .problem-row.state-failed td:not(.difficulty-cell){background-color:#3a1a1a!important}
#appContainer .problems-table .problem-row:hover td:not(.difficulty-cell){background-color:#f0f0f0!important}
#appContainer .problems-table .problem-row.state-passed:hover td:not(.difficulty-cell){background-color:#b9f6ca!important}
#appContainer .problems-table .problem-row.state-failed:hover td:not(.difficulty-cell){background-color:#ffb3b3!important}
:root[data-theme="dark"] #appContainer .problems-table .problem-row:hover td:not(.difficulty-cell){background-color:#2a2a2a!important}
:root[data-theme="dark"] #appContainer .problems-table .problem-row.state-passed:hover td:not(.difficulty-cell){background-color:#2a4a3a!important}
:root[data-theme="dark"] #appContainer .problems-table .problem-row.state-failed:hover td:not(.difficulty-cell){background-color:#4a2a2a!important}
.problem-name{font-weight:600}
.tags-container{display:flex;gap:.4rem;flex-wrap:nowrap;overflow:hidden;min-height:1.5em;align-items:center;padding:0}
.tag{background:#f0f0f0;padding:.1rem .5rem;border-radius:4px;font-size:.7rem;white-space:nowrap}
.sortable{cursor:pointer;user-select:none}
.sortable:hover{color:var(--accent)}
.pagination{display:flex;justify-content:center;align-items:center;gap:.5rem;margin:1rem 0;flex-wrap:wrap}
.pagination a,.pagination span{padding:.3rem .7rem;border:1px solid var(--border-color);border-radius:4px;background:var(--card-bg);color:var(--text-primary);text-decoration:none;font-size:.9rem;cursor:pointer}
.pagination a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.pagination .active{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}
.pagination .disabled{opacity:.5;pointer-events:none;cursor:default}
.fa-star{color:#f1c40f}
.fa-star.far{color:#aaa}
.fa-green{color:#2e7d32}
.fa-red{color:#c62828}
#randomUnsolvedBtn,a[href="/problems/bookmarked"]{font-weight:600;border-radius:20px;padding:.4rem 1.2rem;transition:all .2s ease;box-shadow:0 2px 4px #0000000d}
#randomUnsolvedBtn:hover,a[href="/problems/bookmarked"]:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0000001f}
.rainbow-bg{background:linear-gradient(90deg,red,#f80,#ff0,#0f0,#08f,#80f,#f08,red);background-size:300% 100%;animation:rainbowFlow 4s linear infinite;color:#fff!important;border-radius:4px;padding:0 6px}
@keyframes rainbowFlow {
0%{background-position:0 0}
100%{background-position:300% 0}
}
.star-shine{position:relative;color:#000!important;border-radius:4px;padding:0 6px;overflow:hidden;z-index:0}
.star-shine::before{content:'';position:absolute;top:-100%;left:-100%;width:300%;height:300%;background:conic-gradient(from 0deg,#ffb3ba,#ffdfba,#ffffba,#baffc9,#bae1ff,#e8baff,#ffb3ba,#ffb3ba,#ffdfba,#ffffba,#baffc9,#bae1ff,#e8baff,#ffb3ba);animation:starRotate 4s linear infinite;z-index:-1}
@keyframes starRotate {
0%{transform:rotate(0deg)}
100%{transform:rotate(360deg)}
}
.chaos{background:#000;background-image:repeating-linear-gradient(45deg,#000 0,#000 8px,#4a0088 8px,#4a0088 10px),repeating-linear-gradient(-30deg,#000 0,#000 12px,#6a00cc 12px,#6a00cc 14px),repeating-linear-gradient(70deg,#000 0,#000 15px,#8a2be2 15px,#8a2be2 17px);background-blend-mode:screen;animation:chaosMove .2s linear infinite;color:#fff!important;border-radius:4px;padding:0 6px;text-shadow:0 0 4px #8a2be2}
@keyframes chaosMove {
0%{background-position:0 0,5px 10px,-10px -5px}
100%{background-position:20px 20px,30px 5px,10px -15px}
}
#paginationTopContainer,#paginationContainer{min-height:40px}
#refreshProblemsBtn{width:38px;height:38px;padding:0!important;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:1.2rem;line-height:1;cursor:pointer;transition:background .2s ease,transform .15s ease,box-shadow .2s ease;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;vertical-align:middle}
#refreshProblemsBtn:hover{background:var(--accent-hover);transform:scale(1.05);box-shadow:0 2px 8px #00000026}
#refreshProblemsBtn:active{transform:scale(0.92)}
#refreshProblemsBtn:disabled{opacity:.6;cursor:not-allowed;transform:none!important;box-shadow:none!important}
[data-theme="dark"] #refreshProblemsBtn{color:#fff}
body.hide-difficulty .col-level,body.hide-difficulty .difficulty-cell{display:none!important}
.cat-grid{display:flex;gap:.75rem;margin-bottom:1rem;flex-wrap:wrap;align-items:flex-start}
.cat-col{flex:1 1 220px;min-width:220px;max-width:340px;display:flex;flex-direction:column;gap:.75rem}
.cat-box{background:var(--card-bg);border:1px solid var(--border-color);border-radius:6px;overflow:hidden;box-shadow:var(--shadow-sm)}
.cat-heading{font-weight:700;font-size:.88rem;padding:.55rem .95rem;background:#e9ecef;border-bottom:1px solid var(--border-color);color:var(--text-primary);margin:0;letter-spacing:.2px}
[data-theme="dark"] .cat-heading{background:#2d2d2d;color:#e0e6ed}
.cat-list{list-style:none;margin:0;padding:0}
.cat-item{display:flex;justify-content:space-between;align-items:center;gap:.5rem;padding:.5rem .95rem;border-bottom:1px solid var(--border-color);cursor:pointer;font-size:.84rem;background:transparent;color:var(--text-primary);transition:background .15s,color .15s;user-select:none;line-height:1.3}
.cat-item:last-child{border-bottom:none}
.cat-item:hover{background:#4a90d914}
.cat-item.active{background:var(--accent);color:#fff}
.cat-item.active .cat-badge{background:#ffffff4d;color:#fff}
.cat-item.disabled{opacity:.45;cursor:default;pointer-events:none}
.cat-text{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cat-badge{background:#00000014;color:var(--text-secondary);font-size:.68rem;font-weight:700;padding:1px 8px;border-radius:10px;font-family:'Consolas',monospace;min-width:22px;text-align:center;flex-shrink:0}
.cat-badge.blurred{filter:blur(3px);opacity:.55;user-select:none;pointer-events:none}
[data-theme="dark"] .cat-badge{background:#ffffff1f;color:#c9d1d9}
@media (max-width: 768px) {
.cat-col{flex:1 1 100%;max-width:none}
}
.tag-dd-row{display:flex;align-items:center;gap:.6rem;margin:.5rem 0 .75rem;flex-wrap:wrap}
.tag-dd{position:relative;display:inline-block}
.tag-dd-btn{display:inline-flex;align-items:center;gap:7px;padding:6px 14px;border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);border-radius:4px;font-family:inherit;font-size:.88rem;font-weight:600;cursor:pointer;transition:border-color .15s,color .15s,background .15s}
.tag-dd-btn:hover{border-color:var(--accent);color:var(--accent)}
.tag-dd-btn .caret{display:inline-block;font-size:.7em;transition:transform .15s}
.tag-dd.open .tag-dd-btn{border-color:var(--accent);color:var(--accent)}
.tag-dd.open .tag-dd-btn .caret{transform:rotate(180deg)}
.tag-dd-menu{display:none;position:absolute;top:calc(100% + 4px);left:0;min-width:280px;max-height:420px;overflow-y:auto;list-style:none;margin:0;padding:4px 0;background:var(--card-bg);border:1px solid var(--border-color);border-radius:6px;box-shadow:0 6px 24px #0000001f 0 2px 6px #0000000f;z-index:100}
.tag-dd.open .tag-dd-menu{display:block}
.tag-dd-item{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:6px 14px;font-size:.85rem;color:var(--text-primary);text-decoration:none;cursor:pointer;transition:background .12s}
.tag-dd-item:hover{background:#4a90d914}
.tag-dd-item.active{background:var(--accent);color:#fff}
.tag-dd-item.active .tag-dd-badge{background:#ffffff4d;color:#fff}
.tag-dd-item.empty{opacity:.5;cursor:default}
.tag-dd-item.empty:hover{background:transparent}
.tag-dd-text{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tag-dd-badge{background:#00000014;color:var(--text-secondary);font-size:.7rem;font-weight:700;padding:1px 8px;border-radius:10px;font-family:'Consolas',monospace;min-width:22px;text-align:center;flex-shrink:0}
[data-theme="dark"] .tag-dd-badge{background:#ffffff1f;color:#c9d1d9}
.tag-dd-empty{padding:10px 14px;color:var(--text-secondary);font-size:.85rem;text-align:center}
.tag-dd-hint{font-size:.78rem;color:var(--text-secondary)}
.tag-dd-hint code{background:#4a90d91f;color:var(--accent);padding:1px 6px;border-radius:3px;font-family:'Consolas',monospace}
.slot-overlay{position:fixed;inset:0;background:#000000bf;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:99999;opacity:0;transition:opacity .3s ease}
.slot-overlay.show{opacity:1}
.slot-overlay.fade-out{opacity:0;pointer-events:none}
.slot-machine{background:linear-gradient(180deg,#1e2130 0%,#0f1219 100%);border:2px solid #ffc85059;border-radius:16px;padding:30px 38px;box-shadow:0 0 60px #ffc85040 0 20px 60px #000c;text-align:center;color:#fff;min-width:360px;max-width:92vw;font-family:inherit}
.slot-title{font-size:.82rem;color:#ffc850;letter-spacing:3px;text-transform:uppercase;margin-bottom:20px;font-weight:700;opacity:.85}
.slot-reels{display:flex;gap:12px;justify-content:center;margin-bottom:18px;flex-wrap:wrap}
.slot-reel{background:#000;border:2px solid #333;border-radius:8px;padding:16px 22px;font-family:'Consolas','Monaco',monospace;font-size:2.2rem;font-weight:700;min-width:100px;color:#fff;text-shadow:0 0 20px #ffffff80;box-shadow:inset 0 4px 12px #000000e6;transition:border-color .3s,color .3s;letter-spacing:2px}
.slot-reel.landed{border-color:#ffc850;color:#ffc850;animation:slotGlow .7s ease}
@keyframes slotGlow {
0%{text-shadow:0 0 20px #ffc85080}
40%{text-shadow:0 0 40px #ffc850ff 0 0 80px #ffc850cc}
100%{text-shadow:0 0 20px #ffc85080}
}
.slot-status{font-size:.9rem;color:#aaa;min-height:1.4em;letter-spacing:1.5px;transition:color .3s}
.slot-status.done{color:#ffc850;font-weight:700;font-size:1rem}
@media (max-width: 480px) {
.slot-machine{padding:22px 24px;min-width:auto}
.slot-reel{font-size:1.8rem;min-width:80px;padding:12px 16px}
}
.active-filters-row{display:flex;align-items:center;gap:.6rem;margin:.5rem 0;flex-wrap:wrap;padding:.5rem .7rem;background:#4a90d90d;border:1px dashed #4a90d94d;border-radius:6px;min-height:40px}
.af-label{font-size:.82rem;font-weight:600;color:var(--text-secondary);flex-shrink:0}
.af-chips{display:flex;gap:.4rem;flex-wrap:wrap;flex:1;min-width:0}
.af-chip{display:inline-flex;align-items:center;gap:4px;padding:2px 4px 2px 10px;background:var(--accent);color:#fff;border-radius:12px;font-size:.78rem;font-weight:600;line-height:1.4}
.af-chip-remove{background:transparent;border:none;color:#fff;cursor:pointer;padding:0;width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:1rem;line-height:1;opacity:.8;transition:opacity .15s,background .15s}
.af-chip-remove:hover{opacity:1;background:#ffffff47}
.af-empty{font-size:.82rem;color:var(--text-secondary);font-style:italic}
.af-clear-all{padding:3px 12px;border:1px solid var(--border-color);background:var(--card-bg);border-radius:4px;font-size:.78rem;font-family:inherit;cursor:pointer;color:var(--text-primary);flex-shrink:0;transition:border-color .15s,color .15s}
.af-clear-all:hover{border-color:var(--danger);color:var(--danger)}
.tag.tag-clickable{cursor:pointer;transition:background .15s,color .15s,box-shadow .15s;user-select:none}
.tag.tag-clickable:hover{background:var(--accent);color:#fff}
.tag.tag-clickable.active{background:var(--accent);color:#fff;box-shadow:0 0 0 2px #4a90d959}
.tag.tag-clickable.active::before{content:'✓ ';font-weight:700}
/* ── 科幻主题：题目行的状态底色与 hover ────────────────────────────
   dark 已有一套覆盖，scifi 需要自己的取值，否则会落回浅色
   （#e6ffed / #ffeaea / #f0f0f0）。色相沿用青系以配合整体皮肤。 */
:root[data-theme="scifi"] #appContainer .problems-table .problem-row.state-passed td:not(.difficulty-cell){background-color:#0b2a24!important}
:root[data-theme="scifi"] #appContainer .problems-table .problem-row.state-failed td:not(.difficulty-cell){background-color:#2a1118!important}
:root[data-theme="scifi"] #appContainer .problems-table .problem-row:hover td:not(.difficulty-cell){background-color:#132430!important}
:root[data-theme="scifi"] #appContainer .problems-table .problem-row.state-passed:hover td:not(.difficulty-cell){background-color:#0f3a34!important}
:root[data-theme="scifi"] #appContainer .problems-table .problem-row.state-failed:hover td:not(.difficulty-cell){background-color:#3a1826!important}

/* ── tag 与表头的主题适配 ─────────────────────────────────────────
   .tag 的浅灰 #f0f0f0 与 .problems-table th 的 #e9ecef 都是硬编码。
   dark 下表头由 styles.css 的 :root[data-theme="dark"] table th 覆盖，
   但 .tag 一直没有适配；scifi 两者都缺。 */
:root[data-theme="dark"] .tag{background:#30363d;color:#c9d1d9}
:root[data-theme="scifi"] .tag{background:#0f2231;color:#9fe8ff;border:1px solid rgba(0,229,255,.22)}
:root[data-theme="scifi"] .problems-table th{background:#0a1520;color:#9fe8ff;border-bottom:2px solid var(--border-color)}

/* ── 分类框（problems 顶部筛选区）的主题适配 ─────────────────────
   .cat-heading 写死 #e9ecef，dark 有覆盖但 scifi 没有；
   .cat-badge 用 rgba(0,0,0,.08) 叠加，在深色底上几乎不可见。 */
:root[data-theme="scifi"] .cat-heading{background:#0a1520;color:#9fe8ff;border-bottom-color:var(--border-color)}
:root[data-theme="scifi"] .cat-badge{background:rgba(0,229,255,.12);color:#8fd4e8}
:root[data-theme="dark"] .cat-item:hover{background:#2a2a2a}
:root[data-theme="scifi"] .cat-item:hover{background:#0f2231}