:root{color-scheme:light;--bg:#f5f7fb;--bg-elevated:#ffffff;--surface:#ffffff;--surface-soft:#f8fafc;--surface-muted:#eef2f7;--text:#111827;--text-strong:#020617;--muted:#64748b;--line:#d9e1ec;--line-strong:#b8c4d4;--accent:#0f766e;--accent-strong:#115e59;--accent-soft:#dffcf7;--blue:#2563eb;--blue-soft:#dbeafe;--danger:#b42318;--danger-soft:#fee4e2;--warning:#b54708;--warning-soft:#fef0c7;--success:#027a48;--success-soft:#dcfae6;--info:#175cd3;--info-soft:#dbeafe;--shadow-sm:0 1px 2px rgba(15,23,42,0.06);--shadow-md:0 12px 32px rgba(15,23,42,0.1);--shadow-lg:0 24px 70px rgba(15,23,42,0.14);--focus:#5eead4}:root[data-theme=dark]{color-scheme:dark;--bg:#0b1020;--bg-elevated:#101827;--surface:#121a2a;--surface-soft:#172133;--surface-muted:#1d293d;--text:#e5eefb;--text-strong:#f8fafc;--muted:#9aa8bd;--line:#263449;--line-strong:#3a4a63;--accent:#2dd4bf;--accent-strong:#5eead4;--accent-soft:rgba(45,212,191,0.14);--blue:#60a5fa;--blue-soft:rgba(96,165,250,0.15);--danger:#f97066;--danger-soft:rgba(249,112,102,0.14);--warning:#fdb022;--warning-soft:rgba(253,176,34,0.14);--success:#32d583;--success-soft:rgba(50,213,131,0.14);--info:#84caff;--info-soft:rgba(132,202,255,0.14);--shadow-sm:0 1px 2px rgba(0,0,0,0.25);--shadow-md:0 16px 40px rgba(0,0,0,0.28);--shadow-lg:0 26px 80px rgba(0,0,0,0.38);--focus:#2dd4bf}*{box-sizing:border-box}html{background:var(--bg)}body,html{margin:0;min-height:100%;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:0}body{background:linear-gradient(180deg,rgba(15,118,110,.08),transparent 300px),var(--bg)}:root[data-theme=dark] body{background:linear-gradient(180deg,rgba(45,212,191,.08),transparent 340px),var(--bg)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}.shell{min-height:100vh}.container{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:28px 0 56px}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg-elevated) 90%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.nav-inner{width:min(1180px,calc(100% - 32px));min-height:68px;margin:0 auto;display:flex;gap:14px}.brand,.nav-inner{align-items:center}.brand{display:inline-flex;gap:10px;margin-right:auto;color:var(--text-strong);font-size:1.15rem;font-weight:900}.brand:before{content:"";width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--blue)),var(--accent);box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 32%,transparent)}.nav-link{display:inline-flex;align-items:center;min-height:36px;padding:0 8px;border-radius:6px;color:var(--muted);font-size:.94rem;font-weight:750}.nav-link:hover{background:var(--surface-soft);color:var(--text)}.nav-auth{display:flex;align-items:center;gap:10px;margin-left:2px}.nav-auth-placeholder{width:160px;height:36px}.nav-compact,.user-pill{min-height:36px;padding:0 12px}.user-pill{display:inline-flex;align-items:center;gap:8px;max-width:210px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--accent-strong);box-shadow:var(--shadow-sm);font-size:.9rem;font-weight:850}.user-pill span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.icon-btn{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);box-shadow:var(--shadow-sm);cursor:pointer}.icon-btn:hover{border-color:var(--line-strong);background:var(--surface-soft);color:var(--text)}.danger-btn:hover{border-color:color-mix(in srgb,var(--danger) 40%,var(--line));background:var(--danger-soft);color:var(--danger)}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:24px}.page-title{margin:0 0 8px;color:var(--text-strong);font-size:2.35rem;line-height:1.05}.page-head .muted{max-width:760px}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));grid-gap:18px;gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:var(--shadow-sm)}.card h3{margin-top:0;color:var(--text-strong)}.card:hover{border-color:var(--line-strong)}.stack{display:grid;grid-gap:18px;gap:18px}.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(360px,1.1fr);grid-gap:22px;gap:22px;align-items:start}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm);cursor:pointer;font-weight:800}.btn:hover{transform:translateY(-1px);border-color:var(--line-strong);background:var(--surface-soft)}.btn.primary{border-color:transparent;background:linear-gradient(135deg,var(--accent),var(--blue));color:white;box-shadow:0 14px 30px color-mix(in srgb,var(--accent) 28%,transparent)}.btn.primary:hover{background:linear-gradient(135deg,var(--accent-strong),var(--blue))}.btn:disabled{opacity:.65;cursor:not-allowed;transform:none}.wide-btn{width:100%}.field{display:grid;grid-gap:7px;gap:7px}.field label{color:var(--muted);font-size:.85rem;font-weight:850}.input,.select,.textarea{width:100%;border:1px solid var(--line);border-radius:8px;background:var(--bg-elevated);color:var(--text);padding:11px 12px}.input-wrap:focus-within,.input:focus,.select:focus,.textarea:focus{outline:2px solid color-mix(in srgb,var(--focus) 55%,transparent);outline-offset:2px;border-color:var(--accent)}.input-wrap{min-height:46px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;background:var(--bg-elevated);color:var(--muted);padding:0 12px}.input-wrap input{width:100%;min-width:0;border:0;outline:0;color:var(--text);background:transparent}.input-icon-btn{width:30px;height:30px;flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:999px;background:transparent;color:var(--muted);cursor:pointer}.input-icon-btn:hover{background:var(--surface-muted);color:var(--text)}.textarea{min-height:128px;resize:vertical}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow-sm)}table{width:100%;border-collapse:collapse}td,th{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}th{background:var(--surface-soft);color:var(--muted);font-size:.78rem;font-weight:900;text-transform:uppercase}tr:hover td{background:color-mix(in srgb,var(--surface-soft) 72%,transparent)}tbody tr:last-child td{border-bottom:0}.badge{display:inline-flex;align-items:center;border-radius:999px;padding:4px 10px;font-size:.78rem;font-weight:900;border:1px solid var(--line)}.badge.ac,.badge.easy{color:var(--success);background:var(--success-soft);border-color:color-mix(in srgb,var(--success) 32%,transparent)}.badge.medium,.badge.tle{color:var(--warning);background:var(--warning-soft);border-color:color-mix(in srgb,var(--warning) 32%,transparent)}.badge.ce,.badge.hard,.badge.re,.badge.wa{color:var(--danger);background:var(--danger-soft);border-color:color-mix(in srgb,var(--danger) 32%,transparent)}.badge.pending,.badge.running{color:var(--info);background:var(--info-soft);border-color:color-mix(in srgb,var(--info) 32%,transparent)}.editor-shell{min-height:520px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#1e1e1e;box-shadow:var(--shadow-md)}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}.toolbar .select{max-width:220px}.message{border-radius:8px;padding:11px 13px;background:var(--info-soft);color:var(--info);border:1px solid color-mix(in srgb,var(--info) 28%,transparent);font-weight:700}.error{background:var(--danger-soft);color:var(--danger);border-color:color-mix(in srgb,var(--danger) 30%,transparent)}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-soft);border:1px solid var(--line);border-radius:8px;padding:13px;color:var(--text)}.auth-page{min-height:calc(100vh - 68px);width:min(1180px,calc(100% - 32px));margin:0 auto;padding:42px 0 58px}.auth-hero,.auth-page{display:grid;align-items:center}.auth-hero{grid-template-columns:minmax(0,.95fr) minmax(360px,440px);grid-gap:38px;gap:38px}.auth-copy{padding:24px 0}.eyebrow{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border:1px solid color-mix(in srgb,var(--accent) 42%,transparent);border-radius:999px;background:var(--accent-soft);color:var(--accent-strong);font-size:.78rem;font-weight:900;text-transform:uppercase}.auth-copy h1{max-width:660px;margin:16px 0 12px;color:var(--text-strong);font-size:4rem;line-height:1.02}.auth-copy p{max-width:560px;margin:0;color:var(--muted);font-size:1.08rem;line-height:1.65}.auth-card{display:grid;grid-gap:16px;gap:16px;padding:24px;border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--surface) 96%,transparent);box-shadow:var(--shadow-lg)}.auth-card-head h2{margin:0 0 6px;color:var(--text-strong);font-size:1.65rem}.auth-card-head p{margin:0}.auth-foot{margin:2px 0 0;color:var(--muted);text-align:center;font-size:.95rem}.auth-foot a{color:var(--accent-strong);font-weight:850}.home-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:14px;gap:14px;margin:0 0 22px}.feature-card{position:relative;overflow:hidden}.feature-icon{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;margin-bottom:10px;border:1px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:8px;background:var(--accent-soft);color:var(--accent-strong)}.problem-card{min-height:210px}.problem-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.problem-card-head h3{margin:0}.problem-meta{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted)}.problem-meta span{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface-soft);font-size:.86rem;font-weight:800}.metric{padding:16px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow-sm)}.metric strong{display:block;color:var(--text-strong);font-size:1.6rem}.metric span{color:var(--muted);font-size:.88rem;font-weight:750}@media (max-width:960px){.nav-inner{min-height:auto;flex-wrap:wrap;padding:12px 0}.brand,.nav-auth{width:100%}.nav-auth{margin-left:0}.nav-compact{flex:1 1}.user-pill{flex:1 1;max-width:none}.page-head{align-items:stretch;flex-direction:column}.split{grid-template-columns:1fr}.auth-page{min-height:auto;padding-top:24px}.auth-hero{grid-template-columns:1fr;gap:20px}.auth-copy{padding:0}.auth-copy h1{font-size:2.5rem}.home-metrics{grid-template-columns:1fr}}@media (max-width:620px){.auth-page,.container,.nav-inner{width:min(100% - 24px,1180px)}.page-title{font-size:2rem}.nav-link{flex-grow:1;flex-shrink:1;flex-basis:calc(50% - 8px);justify-content:center;background:var(--surface-soft)}.nav-auth{flex-wrap:wrap}.nav-auth .btn{flex-grow:1;flex-shrink:1;flex-basis:calc(50% - 8px)}.theme-toggle{order:-1}.toolbar .btn,.toolbar .select{width:100%;max-width:none}.auth-card,.card{padding:16px}td,th{padding:11px 12px}.editor-shell{min-height:420px}}