:root{--topbar-height:60px;--sidebar-width:250px;--topbar-bg:#1a1a2e;--topbar-text:#e0e0e0;--sidebar-bg:#16213e;--sidebar-text:#c5c5d2;--sidebar-hover-bg:#1f3460;--sidebar-active-bg:#0f3460;--sidebar-active-text:#ffffff;--accent:#4a90d9;--accent-hover:#3a7bc8;--danger:#e74c3c;--danger-hover:#c0392b;--content-bg:#f0f2f5;--card-bg:#ffffff;--text-primary:#2c3e50;--text-secondary:#6b7d8e;--border-color:#e1e5eb;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 12px rgba(0,0,0,.1);--shadow-lg:0 8px 30px rgba(0,0,0,.12);--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--transition:.2s ease}
:root[data-theme="dark"]{--topbar-bg:#0d1117;--topbar-text:#c9d1d9;--sidebar-bg:#161b22;--sidebar-text:#8b949e;--sidebar-hover-bg:#21262d;--sidebar-active-bg:#1f6feb;--sidebar-active-text:#ffffff;--accent:#58a6ff;--accent-hover:#1f6feb;--danger:#f85149;--danger-hover:#da3633;--content-bg:#0d1117;--card-bg:#161b22;--text-primary:#c9d1d9;--text-secondary:#8b949e;--border-color:#30363d;--shadow-sm:0 1px 3px rgba(0,0,0,.4);--shadow-md:0 4px 12px rgba(0,0,0,.5);--shadow-lg:0 8px 30px rgba(0,0,0,.6)}
body{transition:background .2s ease,color .2s ease}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:14px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:'Segoe UI','Inter',system-ui,-apple-system,sans-serif;color:var(--text-primary);background:var(--content-bg);min-height:100vh;line-height:1.6}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.hidden{display:none!important}
.index-body{padding-top:var(--topbar-height);padding-left:var(--sidebar-width);background:var(--content-bg);min-height:100vh;transition:padding-left .3s ease}
.index-body.sidebar-closed{padding-left:0!important}
.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-height);background:var(--topbar-bg);color:var(--topbar-text);display:flex;align-items:center;justify-content:space-between;overflow-y:hidden;padding:0 24px;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.3)}
.topbar-left{display:flex;align-items:center}
.brand-name a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #ffffff;
  text-decoration: none;     
}

.brand-icon {
  display: block;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;        
}
.topbar-sidebar-toggle{background:none;border:none;color:var(--topbar-text);font-size:1.6rem;cursor:pointer;padding:0 10px;margin-right:12px;line-height:1;display:flex;align-items:center;justify-content:center}
.topbar-sidebar-toggle:hover{color:#ffffff}
.topbar-right{display:flex;align-items:center;gap:20px}
.user-menu{position:relative;cursor:pointer;--user-select:none}
.username-display{display:flex;align-items:center;gap:7px;padding:7px 14px;border-radius:20px;background:rgba(255,255,255,.08);transition:background var(--transition);font-size:.93rem;font-weight:500}
.username-display:hover{background:rgba(255,255,255,.16)}
.user-icon{font-size:1.1rem}
.dropdown-arrow{font-size:.7rem;margin-left:2px;transition:transform var(--transition)}
.user-menu.open .dropdown-arrow{transform:rotate(180deg)}
.logout-dropdown{position:absolute;top:calc(100%+8px);right:0;background:#fff;border-radius:var(--radius-sm);box-shadow:var(--shadow-md);min-width:140px;overflow:hidden;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity var(--transition),transform var(--transition),visibility var(--transition);z-index:2000}
.user-menu.open .logout-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-item,.logout-btn{width:100%;padding:11px 18px;background:#fff;border:none;cursor:pointer;font-size:.9rem;text-align:left;font-weight:500;display:block;text-decoration:none;color:var(--text-primary)}
.dropdown-item:hover,.logout-btn:hover{background:#f0f2f5}
.logout-btn{color:var(--danger)}
.logout-btn:hover{background:#fef2f2}
.clock{display:flex;align-items:center;font-family:monospace;font-size:.95rem;color:#c5d5e8;padding:6px 12px;background:rgba(255,255,255,.05);border-radius:16px}
.clock-time{letter-spacing:1px;font-weight:600}
.sidebar{position:fixed;top:var(--topbar-height);left:0;bottom:0;width:var(--sidebar-width);background:var(--sidebar-bg);z-index:900;overflow-y:auto;box-shadow:2px 0 12px rgba(0,0,0,.1);transition:transform .3s ease;transform:translateX(-100%)}
.sidebar.open{transform:translateX(0)}
.sidebar-nav{padding:16px 0}
.sidebar-nav ul{display:flex;flex-direction:column;gap:2px}
.sidebar-link{display:flex;align-items:center;gap:10px;padding:13px 22px;color:var(--sidebar-text);font-size:.93rem;font-weight:500;transition:all var(--transition);border-left:3px solid transparent}
.sidebar-link:hover{background:var(--sidebar-hover-bg);color:#ddd;border-left-color:rgba(255,255,255,.3)}
.sidebar-link.active{background:var(--sidebar-active-bg);color:var(--sidebar-active-text);border-left-color:var(--accent);font-weight:600}
.main-content{padding:28px 32px;min-height:calc(100vh - var(--topbar-height))}
.updates-panel{background:var(--card-bg);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);min-height:calc(100vh - var(--topbar-height) - 80px);display:flex;flex-direction:column}
.updates-header{display:flex;justify-content:space-between;padding:20px 28px;border-bottom:1px solid var(--border-color);flex-wrap:wrap;gap:10px}
.updates-header h2{font-size:1.4rem;font-weight:700}
.updates-date{font-size:.85rem;color:var(--text-secondary)}
.updates-body{padding:24px 28px;flex:1;display:flex;flex-direction:column;gap:18px;min-height:400px}
.update-card{background:#fafbfc;border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:18px 20px;transition:box-shadow var(--transition)}
.update-card:hover{box-shadow:var(--shadow-sm);border-color:#d0d7e0}
.update-card-header{display:flex;gap:10px;margin-bottom:8px}
.update-badge{font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:12px;text-transform:uppercase}
.update-badge.new{background:#e8f5e9;color:#2e7d32}
.update-badge.info{background:#e3f2fd;color:#1565c0}
.update-time{font-size:.8rem;color:#999}
.update-card h3{font-size:1.05rem;font-weight:600;margin-bottom:6px}
.update-card p{font-size:.9rem;color:var(--text-secondary)}
.placeholder-card{text-align:center;padding:36px 20px;background:#fafbfc;border:2px dashed var(--border-color);color:#b0b8c0}
.placeholder-icon{font-size:2.5rem;margin-bottom:10px}
.sidebar-toggle{display:none;position:fixed;bottom:20px;right:20px;z-index:1100;width:48px;height:48px;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:1.4rem;cursor:pointer;box-shadow:var(--shadow-md)}
.sidebar-toggle:hover{background:var(--accent-hover)}
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:2000}
.modal-card{background:#fff;border-radius:var(--radius-lg);width:90%;max-width:420px;padding:32px 28px;box-shadow:var(--shadow-lg);position:relative}
.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.modal-header h2{font-size:1.5rem;font-weight:700;color:var(--text-primary)}
.modal-close{background:none;border:none;font-size:28px;cursor:pointer;color:#999;line-height:1;padding:0 8px}
.modal-close:hover{color:var(--danger)}
.modal-card .form-group{margin-bottom:18px}
.modal-card .form-group label{display:block;font-weight:600;margin-bottom:6px}
.modal-card .form-group input{width:100%;padding:12px 14px;border:2px solid var(--border-color);border-radius:var(--radius-sm);font-size:1rem}
.modal-card .login-btn{width:100%;margin-top:8px}
.modal-card .login-hint{margin-top:20px;text-align:center;font-size:.75rem;color:#888}
.login-btn{background:#4a90d9;color:#fff;border:none;padding:12px 20px;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:background .2s}
.login-btn:hover{background:#3a7bc8}
@media (max-width:768px){.index-body{padding-left:0}
.sidebar{transform:translateX(-100%)}
.sidebar.open{transform:translateX(0)}
.sidebar-toggle{display:flex;align-items:center;justify-content:center}
.main-content{padding:16px 12px}
.updates-header,.updates-body{padding:14px 16px}
.topbar{padding:0 12px}
.brand-name{font-size:1.3rem;letter-spacing:2px}
.clock{font-size:.8rem;padding:5px 8px}
.username-display{padding:5px 10px;font-size:.82rem}
.topbar-right{gap:8px}
}
.logout-btn-header{background:none;border:1px solid rgba(255,255,255,.3);color:var(--topbar-text);cursor:pointer;padding:.4rem .8rem;border-radius:4px;font-size:.9rem;font-weight:500;transition:all .2s ease;font-family:inherit}
.logout-btn-header:hover{background:var(--danger);border-color:var(--danger);color:#fff}
@media (max-width:768px){.logout-btn-header{padding:.3rem .6rem;font-size:13px}
}
.sidebar-search{display:flex;padding:10px 15px;gap:5px;border-bottom:1px solid var(--border-color);margin-bottom:5px}
.sidebar-search input{flex:1;padding:5px 10px;border:1px solid var(--border-color);border-radius:4px;background:var(--sidebar-bg);color:var(--sidebar-text);font-size:.85rem}
.sidebar-search button{background:var(--sidebar-active-bg);border:none;border-radius:4px;padding:5px 10px;cursor:pointer;color:white}
.sidebar-search button:hover{background:var(--accent)}
:root[data-theme="dark"]{.btn,.login-btn,.check-btn,.submissions-btn{color:#fff}
.logout-btn-header{color:var(--topbar-text)}
.problem-row:hover{background:#21262d!important}
.problem-row.state-passed{background:#1a3a2a!important}
.problem-row.state-failed{background:#3a1a1a!important}
.state-passed{color:#8fce9f}
.state-failed{color:#e89a9a}
.grid-table td.state-passed{background:#1a3a2a;color:#8fce9f}
.grid-table td.state-failed{background:#3a1a1a;color:#e89a9a}
.grid-table td:not(.state-passed):not(.state-failed):not(.empty-cell){background:#21262d;color:var(--text-primary)}
.grid-table td.state-passed:hover{background:#22442f}
.grid-table td.state-failed:hover{background:#4a2222}
.problems-table td,.submissions-table td,.profile-table td,.grid-table td{background-color:#161b22;color:var(--text-primary);border-color:var(--border-color)}
.problems-table th,.submissions-table th,.profile-table th{background:#21262d;color:var(--text-primary)}
.update-card{background:#161b22;border-color:var(--border-color)}
.update-card:hover{border-color:#58a6ff}
.tag{background:#30363d;color:#c9d1d9}
input,textarea,select{background:#0d1117;color:var(--text-primary);border-color:var(--border-color)}
.modal-card{background:#161b22}
}
:root[data-theme="dark"] table th{background:#21262d;color:#c9d1d9;border-bottom:2px solid var(--border-color)}
.root-theme{--topbar-bg:#050a14;--sidebar-bg:#060d1f;--content-bg:#020617;--card-bg:#0b1424;--text-primary:#c8d6e5;--text-secondary:#8395a7;--border-color:#1e3a5f;--accent:#2e86de;--accent-hover:#54a0ff}
.root-theme .topbar,.good-ui .topbar{background:linear-gradient(180deg,#081028 0%,#050a14 100%);border-bottom:1px solid rgba(0,150,255,.4);box-shadow:0 0 20px rgba(0,150,255,.25)}
.root-theme .sidebar,.good-ui .sidebar{background:#060d1f;border-right:1px solid rgba(0,150,255,.4);box-shadow:2px 0 15px rgba(0,150,255,.2)}
.root-theme .main-content,.good-ui .main-content{background:#020617;border-left:1px solid rgba(0,150,255,.4);border-right:1px solid rgba(0,150,255,.4);box-shadow:inset 0 0 30px rgba(0,100,255,.08)}
.root-theme .updates-panel,.root-theme .problems-table,.root-theme .submissions-container,.root-theme .admin-container,.root-theme .profile-container,.root-theme .problem-detail,.root-theme .grid-table,.good-ui .updates-panel,.good-ui .problems-table,.good-ui .submissions-container,.good-ui .admin-container,.good-ui .profile-container,.good-ui .problem-detail,.good-ui .grid-table{background:#0b1424;border:1px solid rgba(0,150,255,.5);box-shadow:0 0 15px rgba(0,150,255,.25),inset 0 0 10px rgba(0,150,255,.05)}
.root-theme table th,.good-ui table th{background:linear-gradient(180deg,rgba(0,150,255,.25) 0%,rgba(0,150,255,.08) 100%);color:#7ec8ff;border-bottom:2px solid rgba(0,150,255,.8);text-shadow:0 0 8px rgba(0,150,255,.6);position:relative;overflow:hidden}
.root-theme table th::before,.good-ui table th::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:linear-gradient( 45deg,transparent 40%,rgba(0,200,255,.2) 50%,transparent 60% );animation:shimmer 4s infinite linear}
@keyframes shimmer{0%{transform:translateX(-100%) translateY(-100%) rotate(45deg)}
100%{transform:translateX(100%) translateY(100%) rotate(45deg)}
}
.root-theme table td,.good-ui table td{border-bottom:1px solid rgba(0,150,255,.3);transition:background .2s}
.root-theme table tbody tr:hover td,.good-ui table tbody tr:hover td{background:rgba(0,150,255,.08)!important;border-color:rgba(0,150,255,.6)}
.root-theme .btn,.root-theme .login-btn,.root-theme .check-btn,.root-theme .submissions-btn,.root-theme .back-btn,.root-theme .logout-btn-header,.root-theme .filter-tag-btn,.good-ui .btn,.good-ui .login-btn,.good-ui .check-btn,.good-ui .submissions-btn,.good-ui .back-btn,.good-ui .logout-btn-header,.good-ui .filter-tag-btn{position:relative;overflow:hidden;transition:all .3s cubic-bezier(.25,.8,.25,1.2);border-radius:4px;border:1px solid rgba(0,150,255,.5);z-index:1}
.root-theme .btn::after,.root-theme .login-btn::after,.root-theme .check-btn::after,.root-theme .submissions-btn::after,.root-theme .back-btn::after,.root-theme .logout-btn-header::after,.root-theme .filter-tag-btn::after,.good-ui .btn::after,.good-ui .login-btn::after,.good-ui .check-btn::after,.good-ui .submissions-btn::after,.good-ui .back-btn::after,.good-ui .logout-btn-header::after,.good-ui .filter-tag-btn::after{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);transition:left .6s;z-index:-1}
.root-theme .btn:hover::after,.root-theme .login-btn:hover::after,.root-theme .check-btn:hover::after,.root-theme .submissions-btn:hover::after,.root-theme .back-btn:hover::after,.root-theme .logout-btn-header:hover::after,.root-theme .filter-tag-btn:hover::after,.good-ui .btn:hover::after,.good-ui .login-btn:hover::after,.good-ui .check-btn:hover::after,.good-ui .submissions-btn:hover::after,.good-ui .back-btn:hover::after,.good-ui .logout-btn-header:hover::after,.good-ui .filter-tag-btn:hover::after{left:100%}
.root-theme .btn:hover,.root-theme .login-btn:hover,.root-theme .check-btn:hover,.root-theme .submissions-btn:hover,.root-theme .back-btn:hover,.root-theme .logout-btn-header:hover,.root-theme .filter-tag-btn:hover,.good-ui .btn:hover,.good-ui .login-btn:hover,.good-ui .check-btn:hover,.good-ui .submissions-btn:hover,.good-ui .back-btn:hover,.good-ui .logout-btn-header:hover,.good-ui .filter-tag-btn:hover{transform:translateY(-2px);box-shadow:0 0 25px rgba(0,150,255,.8)}
.root-theme .btn:active,.good-ui .btn:active{transform:scale(.96)}
.root-theme .btn-primary,.good-ui .btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.root-theme .btn-primary:hover,.good-ui .btn-primary:hover{background:var(--accent-hover)}
.root-theme .btn-warning,.good-ui .btn-warning{background:#ffc107;color:#000;border-color:#ffc107}
.root-theme .btn-warning:hover,.good-ui .btn-warning:hover{background:#e0a800}
.root-theme .btn-danger,.good-ui .btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.root-theme .btn-danger:hover,.good-ui .btn-danger:hover{background:var(--danger-hover)}
.root-theme .btn-secondary,.good-ui .btn-secondary{background:#6c757d;color:#fff;border-color:#6c757d}
.root-theme .btn-secondary:hover,.good-ui .btn-secondary:hover{background:#5a6268}
.root-theme input,.root-theme textarea,.root-theme select,.good-ui input,.good-ui textarea,.good-ui select{background:#050a14;border:1px solid rgba(0,150,255,.4);color:#c8d6e5;transition:box-shadow .3s,border-color .3s}
.root-theme input:focus,.root-theme textarea:focus,.root-theme select:focus,.good-ui input:focus,.good-ui textarea:focus,.good-ui select:focus{border-color:#2e86de;box-shadow:0 0 15px rgba(0,150,255,.6);outline:none}
.root-theme a:hover,.good-ui a:hover{color:#7ec8ff;text-shadow:0 0 8px rgba(0,150,255,.8)}
.good-ui .btn:hover,.good-ui .login-btn:hover,.good-ui .check-btn:hover,.good-ui .submissions-btn:hover,.good-ui .back-btn:hover,.good-ui .logout-btn-header:hover,.good-ui .filter-tag-btn:hover{transform:none;box-shadow:0 6px 20px rgba(0,150,255,.9),0 0 0 2px rgba(0,150,255,.3);border-color:#2e86de}
.good-ui .btn::after,.good-ui .login-btn::after,.good-ui .check-btn::after,.good-ui .submissions-btn::after,.good-ui .back-btn::after,.good-ui .logout-btn-header::after,.good-ui .filter-tag-btn::after{display:none}
.good-ui .sidebar-link:hover{background:linear-gradient(90deg,rgba(0,150,255,.2) 0%,transparent 100%);color:#fff;text-shadow:0 0 8px rgba(0,150,255,.8);border-left-color:#2e86de;border-left-width:4px}
.good-ui .main-content{position:relative}
.good-ui .main-content::before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(1px 1px at 3% 8%,#fff,transparent),radial-gradient(1px 1px at 12% 25%,#fff,transparent),radial-gradient(1px 1px at 22% 12%,#fff,transparent),radial-gradient(1px 1px at 35% 45%,#fff,transparent),radial-gradient(1px 1px at 48% 18%,#fff,transparent),radial-gradient(1px 1px at 55% 60%,#fff,transparent),radial-gradient(1px 1px at 68% 30%,#fff,transparent),radial-gradient(1px 1px at 75% 55%,#fff,transparent),radial-gradient(1px 1px at 82% 70%,#fff,transparent),radial-gradient(1px 1px at 90% 20%,#fff,transparent),radial-gradient(1px 1px at 95% 80%,#fff,transparent),radial-gradient(1px 1px at 8% 85%,#fff,transparent),radial-gradient(1px 1px at 18% 40%,#fff,transparent),radial-gradient(1px 1px at 28% 70%,#fff,transparent),radial-gradient(1px 1px at 38% 5%,#fff,transparent),radial-gradient(1px 1px at 43% 50%,#fff,transparent),radial-gradient(1px 1px at 58% 85%,#fff,transparent),radial-gradient(1px 1px at 65% 15%,#fff,transparent),radial-gradient(1px 1px at 73% 65%,#fff,transparent),radial-gradient(1px 1px at 85% 40%,#fff,transparent),radial-gradient(1px 1px at 92% 5%,#fff,transparent),radial-gradient(2px 2px at 10% 55%,#fff,transparent),radial-gradient(2px 2px at 30% 35%,#fff,transparent),radial-gradient(2px 2px at 50% 75%,#fff,transparent),radial-gradient(2px 2px at 70% 80%,#fff,transparent),radial-gradient(2px 2px at 87% 25%,#fff,transparent),radial-gradient(2px 2px at 15% 15%,#fff,transparent),radial-gradient(3px 3px at 25% 90%,#fff,transparent),radial-gradient(3px 3px at 45% 30%,#fff,transparent),radial-gradient(3px 3px at 60% 5%,#fff,transparent),radial-gradient(3px 3px at 78% 50%,#fff,transparent),radial-gradient(3px 3px at 95% 60%,#fff,transparent);background-size:400px 400px;animation:starMove1 30s linear infinite,starMove2 25s ease-in-out infinite alternate;opacity:.7;pointer-events:none;z-index:0}
@keyframes starMove1{0%{background-position:0 0}
100%{background-position:400px 200px}
}
@keyframes starMove2{0%{background-position:0 0}
100%{background-position:-200px 300px}
}
@keyframes starryMove{0%{background-position:0 0}
100%{background-position:-300px -300px}
}
.good-ui .main-content>*{position:relative;z-index:1}
.good-ui .topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-height);background:linear-gradient(180deg,#081028 0%,#050a14 100%);border-bottom:1px solid rgba(0,150,255,.4);box-shadow:0 0 20px rgba(0,150,255,.25);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:1000;overflow:hidden}
.good-ui .topbar::before{content:"";position:absolute;top:0;left:0;width:300%;height:100%;background:radial-gradient(1px 1px at 5% 20%,#fff,transparent),radial-gradient(1px 1px at 10% 70%,#fff,transparent),radial-gradient(1px 1px at 15% 40%,#fff,transparent),radial-gradient(1px 1px at 20% 10%,#fff,transparent),radial-gradient(1px 1px at 25% 80%,#fff,transparent),radial-gradient(1px 1px at 30% 30%,#fff,transparent),radial-gradient(1px 1px at 35% 90%,#fff,transparent),radial-gradient(1px 1px at 40% 50%,#fff,transparent),radial-gradient(1px 1px at 45% 15%,#fff,transparent),radial-gradient(1px 1px at 50% 75%,#fff,transparent),radial-gradient(1px 1px at 55% 35%,#fff,transparent),radial-gradient(1px 1px at 60% 85%,#fff,transparent),radial-gradient(1px 1px at 65% 45%,#fff,transparent),radial-gradient(1px 1px at 70% 5%,#fff,transparent),radial-gradient(1px 1px at 75% 65%,#fff,transparent),radial-gradient(1px 1px at 80% 25%,#fff,transparent),radial-gradient(1px 1px at 85% 55%,#fff,transparent),radial-gradient(1px 1px at 90% 95%,#fff,transparent),radial-gradient(1px 1px at 95% 15%,#fff,transparent),radial-gradient(2px 2px at 8% 50%,rgba(200,220,255,.9),transparent),radial-gradient(2px 2px at 18% 30%,rgba(200,220,255,.7),transparent),radial-gradient(2px 2px at 28% 70%,rgba(200,220,255,.8),transparent),radial-gradient(2px 2px at 38% 20%,rgba(200,220,255,.6),transparent),radial-gradient(2px 2px at 48% 60%,rgba(200,220,255,.9),transparent),radial-gradient(2px 2px at 58% 40%,rgba(200,220,255,.7),transparent),radial-gradient(2px 2px at 68% 80%,rgba(200,220,255,.8),transparent),radial-gradient(2px 2px at 78% 10%,rgba(200,220,255,.6),transparent),radial-gradient(2px 2px at 88% 50%,rgba(200,220,255,.9),transparent),radial-gradient(2px 2px at 98% 90%,rgba(200,220,255,.7),transparent),radial-gradient(3px 3px at 12% 65%,rgba(200,220,255,.9),transparent),radial-gradient(3px 3px at 32% 25%,rgba(200,220,255,.8),transparent),radial-gradient(3px 3px at 52% 85%,rgba(200,220,255,.9),transparent),radial-gradient(3px 3px at 72% 15%,rgba(200,220,255,.7),transparent),radial-gradient(3px 3px at 92% 55%,rgba(200,220,255,.8),transparent),linear-gradient(180deg,rgba(10,20,40,.9) 0%,rgba(5,10,30,.95) 100%);background-size:400px 200px;animation:galaxyFlow 20s linear infinite;pointer-events:none;z-index:0}
.good-ui .topbar>*{position:relative;z-index:1}
@keyframes galaxyFlow{0%{transform:translateX(0)}
100%{transform:translateX(-33.333%)}
}
.good-ui .sidebar-link{position:relative;overflow:hidden}
.good-ui .sidebar-link::after{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent 0%,rgba(0,180,255,.25) 30%,rgba(255,255,255,.4) 50%,rgba(0,180,255,.25) 70%,transparent 100%);transition:left .6s ease;z-index:-1}
.good-ui .sidebar-link:hover::after{left:100%}
.good-ui .main-content{position:relative;background:#020617;border-left:1px solid rgba(0,150,255,.4);border-right:1px solid rgba(0,150,255,.4);box-shadow:inset 0 0 30px rgba(0,100,255,.08)}
.good-ui .main-content::before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(1px 1px at 3% 8%,#fff,transparent),radial-gradient(1px 1px at 12% 25%,#fff,transparent),radial-gradient(1px 1px at 22% 12%,#fff,transparent),radial-gradient(1px 1px at 35% 45%,#fff,transparent),radial-gradient(1px 1px at 48% 18%,#fff,transparent),radial-gradient(1px 1px at 55% 60%,#fff,transparent),radial-gradient(1px 1px at 68% 30%,#fff,transparent),radial-gradient(1px 1px at 75% 55%,#fff,transparent),radial-gradient(1px 1px at 82% 70%,#fff,transparent),radial-gradient(1px 1px at 90% 20%,#fff,transparent),radial-gradient(1px 1px at 95% 80%,#fff,transparent),radial-gradient(1px 1px at 8% 85%,#fff,transparent),radial-gradient(1px 1px at 18% 40%,#fff,transparent),radial-gradient(1px 1px at 28% 70%,#fff,transparent),radial-gradient(1px 1px at 38% 5%,#fff,transparent),radial-gradient(1px 1px at 43% 50%,#fff,transparent),radial-gradient(1px 1px at 58% 85%,#fff,transparent),radial-gradient(1px 1px at 65% 15%,#fff,transparent),radial-gradient(1px 1px at 73% 65%,#fff,transparent),radial-gradient(1px 1px at 85% 40%,#fff,transparent),radial-gradient(1px 1px at 92% 5%,#fff,transparent),radial-gradient(2px 2px at 10% 55%,#fff,transparent),radial-gradient(2px 2px at 30% 35%,#fff,transparent),radial-gradient(2px 2px at 50% 75%,#fff,transparent),radial-gradient(2px 2px at 70% 80%,#fff,transparent),radial-gradient(2px 2px at 87% 25%,#fff,transparent),radial-gradient(2px 2px at 15% 15%,#fff,transparent),radial-gradient(3px 3px at 25% 90%,#fff,transparent),radial-gradient(3px 3px at 45% 30%,#fff,transparent),radial-gradient(3px 3px at 60% 5%,#fff,transparent),radial-gradient(3px 3px at 78% 50%,#fff,transparent),radial-gradient(3px 3px at 95% 60%,#fff,transparent);background-size:400px 400px;animation:starMove1 30s linear infinite,starMove2 25s ease-in-out infinite alternate;opacity:.7;pointer-events:none;z-index:0}
@keyframes starMove1{0%{background-position:0 0}
100%{background-position:400px 200px}
}
@keyframes starMove2{0%{background-position:0 0}
100%{background-position:-200px 300px}
}
.good-ui .main-content>*{position:relative;z-index:1}
.good-ui .updates-panel,.good-ui .problems-table,.good-ui .submissions-container,.good-ui .admin-container,.good-ui .profile-container,.good-ui .problem-detail,.good-ui .grid-table{background:rgba(11,20,36,.95);border:1px solid rgba(0,150,255,.5);box-shadow:0 0 15px rgba(0,150,255,.25),inset 0 0 10px rgba(0,150,255,.05)}
.good-ui table th{background:linear-gradient(180deg,rgba(0,150,255,.25) 0%,rgba(0,150,255,.08) 100%);color:#7ec8ff;border-bottom:2px solid rgba(0,150,255,.8);text-shadow:0 0 8px rgba(0,150,255,.6)}
.good-ui .btn:hover,.good-ui .login-btn:hover,.good-ui .check-btn:hover,.good-ui .submissions-btn:hover,.good-ui .back-btn:hover,.good-ui .logout-btn-header:hover,.good-ui .filter-tag-btn:hover{box-shadow:0 0 20px rgba(0,150,255,.8);border-color:#2e86de;transform:none}
.good-ui .btn-primary{background:#2e86de;color:#fff}
.good-ui .btn-warning{background:#ffc107;color:#000}
.good-ui .btn-danger{background:var(--danger);color:#fff}
.good-ui .btn-secondary{background:#6c757d;color:#fff}
.compact-mode .main-content{padding:16px 20px}
.compact-mode .updates-header,.compact-mode .updates-body{padding:12px 16px}
.compact-mode .problems-table th,.compact-mode .problems-table td{padding:.3rem .4rem}
.compact-mode .sidebar-link{padding:10px 18px}
.no-animations *,.no-animations *::before,.no-animations *::after{animation:none!important;transition:none!important}
:root.ui-type2{--topbar-bg:#f3e8ee;--topbar-text:#4a3b4f;--sidebar-bg:#fae3e8;--sidebar-text:#4e3b4a;--sidebar-hover-bg:#f5d6e0;--sidebar-active-bg:#e8c4d0;--sidebar-active-text:#3a1e2e;--accent:#d4789c;--accent-hover:#c06088;--danger:#d66b6b;--danger-hover:#c05050;--content-bg:#fef9fb;--card-bg:#ffffff;--text-primary:#3d2c38;--text-secondary:#7a6070;--border-color:#f0dae4;--shadow-sm:0 1px 3px rgba(180,120,140,.1);--shadow-md:0 4px 12px rgba(180,120,140,.15);--shadow-lg:0 8px 30px rgba(180,120,140,.2)}
:root.ui-type2[data-theme="dark"]{--topbar-bg:#2d1e28;--topbar-text:#e8d5df;--sidebar-bg:#3a2530;--sidebar-text:#d4bcc6;--sidebar-hover-bg:#503040;--sidebar-active-bg:#7a4058;--sidebar-active-text:#ffffff;--accent:#d4789c;--accent-hover:#e090b0;--danger:#e07070;--danger-hover:#d05050;--content-bg:#1f141a;--card-bg:#2a1c22;--text-primary:#ebdce4;--text-secondary:#b79aa8;--border-color:#4a3040;--shadow-sm:0 1px 3px rgba(0,0,0,.4);--shadow-md:0 4px 12px rgba(0,0,0,.5);--shadow-lg:0 8px 30px rgba(0,0,0,.6)}
:root.ui-type2 .brand-name,:root.ui-type2 .brand-name a{color:var(--topbar-text)}
table{border-collapse:collapse;border:1px solid var(--border-color)}
th,td{border:1px solid var(--border-color);padding:.5rem}
:root[data-theme="dark"] table{border-color:#e0e0e0}
:root[data-theme="dark"] th,:root[data-theme="dark"] td{border-color:#8b949e}
table tbody tr:hover td{background-color:rgba(0,0,0,.06)!important;transition:background-color .15s ease}
:root[data-theme="dark"] table tbody tr:hover td{background-color:rgba(255,255,255,.08)!important}
.star-favorite { color: #f1c40f; cursor: pointer; }
.star-not-favorite { color: #aaa; cursor: pointer; }
.star-favorite:hover, .star-not-favorite:hover { opacity: 0.8; }
.problems-table td {
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
}
.problems-table th {
  padding-top: 0.3rem;
  padding-bottom: 0.3rem;
}
/* 桌面端侧边栏固定 */
@media (min-width: 769px) {
  .sidebar {
    transform: translateX(0) !important;
    position: fixed;
    left: 0;
    top: var(--topbar-height);
    bottom: 0;
    width: var(--sidebar-width);
    z-index: 900;
    transition: none;
  }
  .index-body {
    padding-left: var(--sidebar-width);
  }
}

/* 移动端侧边栏从顶部滑出 */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    bottom: 0;
    width: 100%;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 900;
    background: var(--sidebar-bg);
    overflow-y: auto;
  }
  .sidebar.open {
    transform: translateY(0);
  }
  .index-body {
    padding-left: 0;
  }
}