:root{--bg:#f5f6f8;--panel:#fff;--border:#e2e5ea;--text:#1f2430;--muted:#667085;--accent:#2563eb;--accent-weak:#eef4ff;--danger:#dc2626;--danger-weak:#fef2f2;--warn:#b45309;--warn-weak:#fffbeb;--ok:#15803d;--ok-weak:#f0fdf4;--radius:12px;--mono:ui-monospace, Consolas, "Courier New", monospace;--sans:system-ui, "Segoe UI", "Microsoft YaHei", Roboto, sans-serif;font:15px/1.55 var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0}button{font:inherit;cursor:pointer}input,select{font:inherit}.app{max-width:1020px;margin:0 auto;padding:24px 20px 60px}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:8px;display:flex}.app-title{margin:0;font-size:24px;font-weight:650}.app-subtitle{color:var(--muted);margin:0 0 20px;font-size:13px}.steps{flex-wrap:wrap;gap:8px;margin:18px 0 20px;display:flex}.step-pill{border:1px solid var(--border);background:var(--panel);color:var(--muted);border-radius:999px;align-items:center;gap:8px;padding:7px 14px;font-size:14px;display:flex}.step-pill .num{background:var(--border);width:20px;height:20px;color:var(--muted);border-radius:50%;justify-content:center;align-items:center;font-size:12px;display:inline-flex}.step-pill.active{border-color:var(--accent);color:var(--accent);background:var(--accent-weak)}.step-pill.active .num{background:var(--accent);color:#fff}.step-pill:disabled{cursor:not-allowed;opacity:.55}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:20px}.panel h2{margin:0 0 14px;font-size:16px;font-weight:650}.panel h3{margin:18px 0 10px;font-size:14px;font-weight:650}.hint{color:var(--muted);font-size:13px}.muted{color:var(--muted)}.field{margin-bottom:12px}.field label{color:var(--muted);margin-bottom:4px;font-size:13px;display:block}.field input{border:1px solid var(--border);width:100%;color:var(--text);background:#fff;border-radius:8px;padding:8px 10px}.field input:focus{outline:2px solid var(--accent-weak);border-color:var(--accent)}.field-row{gap:10px;display:flex}.field-row .field{flex:1}.btn{border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:8px;padding:8px 16px}.btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover:not(:disabled){color:#fff;background:#1d4ed8}.btn.small{padding:5px 10px;font-size:13px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.banner{border:1px solid #0000;border-radius:8px;margin:10px 0;padding:10px 14px;font-size:13.5px}.banner.error{background:var(--danger-weak);color:var(--danger);border-color:#fecaca}.banner.warn{background:var(--warn-weak);color:var(--warn);border-color:#fde68a}.banner.ok{background:var(--ok-weak);color:var(--ok);border-color:#bbf7d0}.banner.info{background:var(--accent-weak);color:var(--accent);border-color:#c7dbff}.mode-cards{grid-template-columns:1fr 1fr;gap:12px;margin:8px 0 4px;display:grid}.mode-card{text-align:left;border:1.5px solid var(--border);background:var(--panel);border-radius:var(--radius);color:var(--text);padding:14px}.mode-card strong{margin-bottom:4px;display:block}.mode-card.active{border-color:var(--accent);background:var(--accent-weak)}.mode-card .hint{display:block}.uploader-grid{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.face-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);padding:12px}.face-card-head{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.face-badge{align-items:center;gap:6px;font-size:13px;font-weight:650;display:inline-flex}.face-dot{border:1px solid #00000026;border-radius:4px;width:14px;height:14px}.face-tip{color:var(--muted);min-height:32px;margin-bottom:8px;font-size:12px}.dropzone{border:1.5px dashed var(--border);text-align:center;color:var(--muted);cursor:pointer;background:#fafbfc;border-radius:8px;padding:18px 8px;font-size:13px}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);color:var(--accent);background:var(--accent-weak)}.preview-wrap{border-radius:8px;position:relative;overflow:hidden}.preview-img{border:1px solid var(--border);border-radius:8px;width:100%;display:block}.card-actions{flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px;display:flex}.crop-overlay{border:2px solid var(--accent);cursor:move;touch-action:none;border-radius:4px;position:absolute;box-shadow:0 0 0 9999px #00000059}.crop-line{pointer-events:none;background:#2563eb8c;position:absolute}.crop-line.v{width:1px;top:0;bottom:0}.crop-line.h{height:1px;left:0;right:0}.crop-handle{background:var(--accent);cursor:nwse-resize;touch-action:none;border:2px solid #fff;border-radius:50%;width:14px;height:14px;position:absolute;bottom:-7px;right:-7px}.editor-layout{flex-wrap:wrap;gap:24px;display:flex}.palette{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;display:flex}.palette-swatch{color:#111;border:2px solid #0000;border-radius:7px;justify-content:center;align-items:center;width:30px;height:30px;font-size:12px;font-weight:700;display:inline-flex;box-shadow:inset 0 0 0 1px #0000002e}.palette-swatch.active{border-color:var(--accent);outline:2px solid var(--accent-weak)}.net{grid-template-columns:repeat(4,auto);gap:10px;width:max-content;display:grid}.net-face{flex-direction:column;align-items:center;gap:4px;display:flex}.net-face-label{color:var(--muted);font-size:12px}.net-grid{background:#d6d9de;border-radius:6px;grid-template-rows:repeat(3,28px);grid-template-columns:repeat(3,28px);gap:2px;padding:2px;display:grid}.net-cell{color:#0000008c;border:none;border-radius:3px;padding:0;font-size:11px;font-weight:700;position:relative}.net-cell.locked{cursor:not-allowed}.net-cell.suspect:after{content:"";border:2px solid var(--danger);border-radius:3px;animation:1.2s ease-in-out infinite suspect-pulse;position:absolute;inset:0}@keyframes suspect-pulse{50%{opacity:.35}}.status-line{margin-top:10px;font-size:13.5px}.status-line.ok{color:var(--ok)}.status-line.bad{color:var(--danger)}.player-layout{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:20px;display:grid}twisty-player{width:100%;height:420px;display:block}.move-list{border:1px solid var(--border);border-radius:8px;max-height:420px;overflow:auto}.move-row{border-bottom:1px solid #f0f1f4;align-items:center;gap:10px;padding:7px 12px;font-size:13.5px;display:flex}.move-row:last-child{border-bottom:none}.move-row .idx{color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;width:32px}.move-row .alg{font-family:var(--mono);color:var(--accent);width:34px;font-weight:700}.solution-summary{margin-bottom:12px;font-size:14px}.badge{border:1px solid var(--border);color:var(--muted);vertical-align:1px;border-radius:999px;margin-left:8px;padding:1px 10px;font-size:12px;display:inline-block}.badge.ok{color:var(--ok);background:var(--ok-weak);border-color:#bbf7d0}.app-footer{color:var(--muted);text-align:center;margin-top:28px;font-size:12.5px}@media (width<=860px){.uploader-grid{grid-template-columns:repeat(2,1fr)}.player-layout{grid-template-columns:1fr}.proxy-toggle{border:1px solid var(--border);cursor:pointer;background:#fafbfc;border-radius:8px;align-items:flex-start;gap:10px;margin-top:14px;padding:10px 12px;font-size:13px;line-height:1.5;display:flex}.proxy-toggle input{flex-shrink:0;margin-top:3px}.proxy-toggle code{font-family:var(--mono);background:var(--code-bg,#f4f3ec);border-radius:4px;padding:0 4px;font-size:12px}.mode-cards{grid-template-columns:1fr}}@media (width<=560px){.uploader-grid{grid-template-columns:1fr}}