:root{color:#263548;background:#f0f2f5;font-family:Helvetica Neue,PingFang SC,Microsoft YaHei,Arial,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;--ink: #263548;--ink-soft: #607083;--line: #d9dee5;--panel: #f9fafb;--blue: #409eff;--blue-deep: #1976d2;--red: #e74c3c;--green: #67b82a;--orange: #e89b26;--shadow: 0 8px 24px rgb(33 47 65 / 10%)}*{box-sizing:border-box}html{min-width:320px;min-height:100%;background:#f0f2f5}body{min-width:320px;min-height:100vh;margin:0;padding:20px 10px;background:linear-gradient(135deg,rgb(255 255 255 / 58%) 0 1px,transparent 1px 18px),#f0f2f5;background-size:18px 18px}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid rgb(64 158 255 / 32%);outline-offset:2px}button:disabled{cursor:not-allowed}#app{width:100%}.app-shell{width:min(100%,1080px);min-height:calc(100vh - 40px);margin:0 auto;padding:22px 24px 18px;overflow:hidden;border:1px solid rgb(213 219 227 / 85%);border-radius:12px;background:#fff;box-shadow:var(--shadow)}.app-header{position:relative;padding:5px 4px 18px;border-bottom:1px solid #e5e8ec}.app-header:after{position:absolute;right:0;bottom:-1px;width:112px;height:3px;background:linear-gradient(90deg,transparent,var(--blue));content:""}.app-header h1{margin:0;color:#2c3e50;font-size:clamp(1.55rem,3vw,2.15rem);font-weight:760;letter-spacing:.015em;line-height:1.25}.panel-section{margin-top:18px;padding:15px 17px;border:1px solid var(--line);border-radius:12px;background:var(--panel);box-shadow:0 3px 9px #2635480a}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.section-heading>div{display:flex;align-items:baseline;gap:10px}.section-heading h2{margin:0;color:#34495e;font-size:1.08rem;line-height:1.2}.section-heading__index{color:var(--blue);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.72rem;font-weight:800;letter-spacing:.08em}.section-heading__meta{color:#8a96a5;font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.size-control__form{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.size-control__form>label{color:#34495e;font-size:.9rem;font-weight:700}.size-control__field{display:flex;align-items:center;gap:8px;color:#8b96a3}.size-control__field input,.size-control__field output{width:72px;height:38px;border:1.8px solid #cbd2da;border-radius:8px;background:#fff;color:#2c3e50;font-weight:700;text-align:center}.size-control__field input{padding:5px 8px;transition:border-color .18s ease,box-shadow .18s ease}.size-control__field input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #409eff1f;outline:0}.size-control__field input[aria-invalid=true]{border-color:var(--red)}.size-control__field output{display:grid;place-items:center;background:#edf1f5;color:#667486}.field-message{margin:9px 0 0;color:#7b8796;font-size:.78rem;line-height:1.45}.field-message--error{color:#c74034;font-weight:650}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start;margin-top:20px}.board-panel,.inventory-panel{min-width:0;border:1.5px solid var(--line);border-radius:12px;background:var(--panel);box-shadow:0 4px 10px #2635480d}.board-panel{padding:16px}.section-heading--board{margin-bottom:14px}.board-size-badge{padding:4px 9px;border:1px solid #ccd5df;border-radius:999px;background:#fff;color:#627185;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.72rem;font-weight:700}.board-scroll{width:100%;padding:12px;overflow:auto;border:1px solid #d9dee4;border-radius:12px;background:linear-gradient(90deg,rgb(64 158 255 / 3%) 1px,transparent 1px),linear-gradient(rgb(64 158 255 / 3%) 1px,transparent 1px),#f4f6f8;background-size:16px 16px;box-shadow:inset 0 0 6px #4c5a6c1a;scrollbar-color:#bcc6d2 transparent;scrollbar-width:thin}.board-grid{--cell-size: 52px;display:grid;grid-template-columns:repeat(var(--board-size),var(--cell-size));grid-auto-rows:var(--cell-size);gap:3px;width:max-content;margin:0 auto;padding:3px;border-radius:10px;background:#d8dde4;box-shadow:0 2px 8px #303d4d1a;-webkit-user-select:none;user-select:none;touch-action:manipulation}.board-cell{position:relative;display:grid;place-items:center;width:var(--cell-size);height:var(--cell-size);padding:0;overflow:hidden;border:1px solid #e1e5ea;border-radius:7px;background:#fff;color:#8793a1;cursor:pointer;transition:transform .1s ease,border-color .18s ease,background-color .18s ease,box-shadow .18s ease}.board-cell:hover{z-index:2;border-color:#72b7ff;box-shadow:0 0 0 2px #409eff24;transform:translateY(-1px)}.board-cell:active{transform:translateY(0) scale(.96)}.board-cell--center:before{position:absolute;top:4px;left:4px;width:4px;height:4px;border-radius:50%;background:#9ca8b5;content:""}.board-cell--mount{border:1.5px solid var(--blue);background:#eef6ff;box-shadow:inset 0 0 0 1px #409eff1a}.board-cell__coordinate{color:#b7bec7;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.56rem;opacity:0;transition:opacity .15s ease}.board-cell:hover .board-cell__coordinate,.board-cell:focus-visible .board-cell__coordinate{opacity:1}.mount-marker{position:relative;display:grid;place-items:center;width:23px;height:23px;border:2px solid var(--blue-deep);border-radius:50%;background:#fff;box-shadow:0 2px 4px #1976d22e}.mount-marker:before,.mount-marker:after{position:absolute;background:var(--blue-deep);content:""}.mount-marker:before{width:7px;height:7px;transform:rotate(45deg)}.mount-marker:after{bottom:-7px;width:2px;height:6px}.board-cell--assigned{border-width:2px;box-shadow:inset 0 0 8px #ffffff57}.board-cell--level-1{border-color:#4e9f16;background:#8bd343;color:#183807}.board-cell--level-2{border-color:#1976d2;background:#80c4f8;color:#0c3d68}.board-cell--level-3{border-color:#bd7410;background:#f5b24b;color:#553000}.board-cell__level{font-family:Georgia,Times New Roman,serif;font-size:1.22rem;font-weight:800;line-height:1;text-shadow:0 1px rgb(255 255 255 / 42%)}.level-legend{display:flex;gap:8px;justify-content:center;margin-top:12px;flex-wrap:wrap}.level-legend__item{padding:5px 9px;border:1px solid;border-radius:7px;font-size:.72rem;font-weight:750}.level-legend__item--1{border-color:#76b746;background:#eff9e8;color:#3f7919}.level-legend__item--2{border-color:#6daee4;background:#eaf5fd;color:#246a9f}.level-legend__item--3{border-color:#dc9c44;background:#fff5e5;color:#94601a}.inventory-panel{position:sticky;top:12px;padding:16px 14px}.inventory-list{display:flex;flex-direction:column;gap:10px}.inventory-item{padding:11px;border:1px solid #e0e4e9;border-left-width:4px;border-radius:9px;background:#fff}.inventory-item--1{border-left-color:var(--green)}.inventory-item--2{border-left-color:var(--blue)}.inventory-item--3{border-left-color:var(--orange)}.inventory-item__identity{display:flex;align-items:center;gap:9px;margin-bottom:10px}.inventory-item__identity>div{display:flex;min-width:0;flex-direction:column}.inventory-item__identity strong{overflow:hidden;color:#34495e;font-size:.84rem;text-overflow:ellipsis;white-space:nowrap}.level-chip{display:grid;width:32px;height:32px;flex:0 0 auto;place-items:center;border:1px solid #d5dbe2;border-radius:8px;background:#f7f9fb;color:#354a60;font-family:Georgia,Times New Roman,serif;font-size:.92rem;font-weight:800;box-shadow:0 2px 5px #26354814}.stepper{display:grid;grid-template-columns:35px minmax(48px,1fr) 35px;gap:6px}.stepper button,.stepper input{height:34px;border:1.5px solid #cbd2da;border-radius:7px;background:#fff;color:#34495e;text-align:center}.stepper button{padding:0;color:#4f6c88;cursor:pointer;font-size:1.08rem;font-weight:700;transition:border-color .16s ease,background-color .16s ease}.stepper button:hover:not(:disabled){border-color:var(--blue);background:#edf6ff}.stepper button:disabled{border-color:#e2e6eb;background:#f4f5f7;color:#b6bec7}.stepper input{min-width:0;padding:4px;font-weight:750}.stepper input:focus{border-color:var(--blue);outline:0}input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{margin:0;-webkit-appearance:none;-moz-appearance:none;appearance:none}input[type=number]{-webkit-appearance:textfield;-moz-appearance:textfield;appearance:textfield}.inventory-totals{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;margin-top:14px;padding:12px;border-radius:9px;background:#eef1f4}.inventory-totals>div{display:flex;flex-direction:column;text-align:center}.inventory-totals span{color:#7d8997;font-size:.68rem}.inventory-totals strong{margin-top:2px;color:#30475f;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:1.15rem}.inventory-totals__divider{color:#b0b8c1!important;font-size:1.2rem!important}.inventory-summary{display:flex;align-items:flex-start;gap:7px;margin:10px 0 0;padding:8px 9px;border-radius:7px;background:#fff3f1;color:#a14a41;font-size:.75rem;font-weight:650;line-height:1.45}.inventory-summary__indicator{width:7px;height:7px;margin-top:3px;flex:0 0 auto;border-radius:50%;background:var(--red)}.inventory-summary--matched{background:#edf8e7;color:#477c26}.inventory-summary--matched .inventory-summary__indicator{background:var(--green)}.action-bar{display:flex;justify-content:center;gap:12px;margin-top:20px;flex-wrap:wrap}.button{min-height:40px;padding:9px 22px;border:0;border-radius:12px;cursor:pointer;font-size:.9rem;font-weight:750;letter-spacing:.02em;-webkit-user-select:none;user-select:none;transition:background-color .18s ease,box-shadow .18s ease,transform .1s ease}.button:hover:not(:disabled){transform:translateY(-1px)}.button:active:not(:disabled){transform:translateY(0)}.button--primary{background:var(--red);color:#fff;box-shadow:0 3px 8px #e74c3c3d}.button--primary:hover:not(:disabled),.button--danger:hover:not(:disabled){background:#ff6050}.button--primary:disabled{background:#efaaa4;box-shadow:none;color:#fff8f7}.button--secondary{background:#5dade2;color:#fff;box-shadow:0 3px 8px #5dade238}.button--secondary:hover:not(:disabled){background:#78bde9}.button--secondary:disabled{background:#b8d9ee;box-shadow:none}.button--ghost{border:1px solid #ccd3db;background:#fff;color:#667487}.button--ghost:hover:not(:disabled){background:#edf1f5}.button--ghost:disabled{border-color:#e0e4e8;background:#f5f6f7;color:#aeb6bf}.button--danger{background:var(--red);color:#fff}.action-bar__solve{min-width:160px}.button-spinner{display:inline-block;width:14px;height:14px;margin-right:7px;vertical-align:-2px;border:2px solid rgb(255 255 255 / 45%);border-top-color:#fff;border-radius:50%;animation:spin .75s linear infinite}.status-message{display:flex;max-width:720px;gap:12px;align-items:flex-start;margin:16px auto 0;padding:13px 16px;border:1px solid #d5dce4;border-left-width:4px;border-radius:10px;background:#f6f8fa}.status-message__icon{width:13px;height:13px;margin-top:3px;flex:0 0 auto;border:3px solid currentColor;border-radius:50%}.status-message strong{color:#34495e;font-size:.83rem}.status-message p{margin:3px 0 0;color:#627084;font-size:.82rem;line-height:1.5}.status-message--calculating{border-left-color:var(--blue);color:var(--blue)}.status-message--calculating .status-message__icon{border-right-color:transparent;animation:spin .75s linear infinite}.status-message--solved{border-left-color:var(--green);background:#f1f8ed;color:var(--green)}.status-message--unsatisfiable,.status-message--error{border-left-color:var(--red);background:#fff5f4;color:var(--red)}.app-footer{display:flex;justify-content:flex-end;gap:16px;margin-top:24px;padding:13px 4px 0;border-top:1px solid #e4e8ec;color:#8c97a5;font-size:.64rem;font-weight:700;letter-spacing:.09em}.modal-overlay{position:fixed;z-index:1000;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:20px;background:#121c277a;animation:fade-in .18s ease}.confirm-dialog{width:min(100%,420px);padding:25px;border:1px solid #e3e6ea;border-radius:16px;background:#fff;box-shadow:0 18px 55px #0f1b2840;text-align:center;animation:dialog-in .22s ease}.confirm-dialog__mark{display:grid;width:43px;height:43px;margin:0 auto 13px;place-items:center;border:2px solid var(--red);border-radius:50%;color:var(--red);font-size:1.25rem;font-weight:800}.confirm-dialog h2{margin:0;color:#2c3e50;font-size:1.2rem}.confirm-dialog p{margin:11px 0 20px;color:#6c7888;font-size:.86rem;line-height:1.6}.confirm-dialog__actions{display:flex;justify-content:center;gap:10px}.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;border:0!important;white-space:nowrap!important}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fade-in{0%{opacity:0}}@keyframes dialog-in{0%{opacity:0;transform:translateY(15px) scale(.97)}}@media(max-width:760px){body{padding:0;background:#fff}.app-shell{min-height:100vh;padding:18px 14px 15px;border:0;border-radius:0;box-shadow:none}.workspace{grid-template-columns:1fr}.inventory-panel{position:static}.inventory-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.inventory-item{min-width:0}.inventory-item__identity{align-items:flex-start}.inventory-item__identity strong{white-space:normal}.stepper{grid-template-columns:32px minmax(36px,1fr) 32px;gap:3px}.board-grid{--cell-size: 46px}}@media(max-width:560px){.app-header p{font-size:.84rem}.size-control__form{align-items:flex-end}.size-control__form>label{width:100%}.workspace{gap:14px;margin-top:14px}.board-panel,.inventory-panel,.panel-section{padding:13px}.board-scroll{padding:8px}.board-grid{--cell-size: 43px}.inventory-list{grid-template-columns:1fr}.inventory-item{display:grid;grid-template-columns:minmax(0,1fr) minmax(130px,.8fr);gap:8px;align-items:center}.inventory-item__identity{margin-bottom:0}.action-bar{display:grid;grid-template-columns:1fr 1fr}.action-bar__solve{grid-column:1 / -1;width:100%}.button{padding-inline:14px}.app-footer{flex-direction:column;gap:5px;text-align:center}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:1ms!important;animation-iteration-count:1!important;transition-duration:1ms!important}}