@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;650;700;750;800&display=swap');
:root{--accent:#2463eb;--ink:#14243e;--muted:#52657f;--line:#dfe7f2;--page:#f7f9fd}*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:18px/1.6 Inter,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #6497ff;outline-offset:3px}header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1320px;margin:auto;min-height:96px;padding:18px 40px;display:flex;gap:26px;align-items:center}.brand{display:flex;align-items:center;color:var(--ink);font-weight:750;font-size:30px;letter-spacing:-1.3px}.logo{display:grid;grid-template-columns:repeat(2,10px);gap:4px;background:var(--accent);padding:10px;border-radius:11px;margin-right:12px;transform:rotate(-3deg)}.logo i{width:10px;height:10px;background:#fff;border-radius:2px}.logo i:last-child{opacity:.45}.dot{color:var(--accent)}.back{margin-left:auto;font-weight:600}.badge{background:#edf3ff;color:#315caa;padding:6px 12px;border-radius:7px;font-size:14px;font-weight:600}main{max-width:1240px;margin:auto;padding:0 24px}.hero{padding:56px 0 42px;display:grid;grid-template-columns:1fr 300px;align-items:center}.eyebrow{font-size:13px;font-weight:700;letter-spacing:1.8px;color:#4c6590}h1{font-size:clamp(38px,4.3vw,57px);line-height:1.12;letter-spacing:-2.5px;margin:16px 0 20px;font-weight:750}h1 span{color:var(--accent)}.hero p{font-size:20px;color:var(--muted);margin:0}.art{height:235px;position:relative}.paper{position:absolute;left:10px;top:15px;width:185px;height:196px;background:linear-gradient(145deg,#fff,#edf3ff);border:1px solid white;border-radius:16px;box-shadow:4px 8px 0 #dbe5f7,12px 22px 30px #2a57a217;padding:22px;transform:rotate(-10deg)}.paper span{font-size:10px;letter-spacing:1px;color:#45628c;display:block}.paper i{display:block;height:8px;background:#d9e5fa;border-radius:3px;margin-top:18px}.paper i:nth-child(3){width:70%}.paper b{display:block;font-size:16px;color:#2864cf;margin-top:15px}.calc{position:absolute;left:159px;top:98px;width:115px;height:120px;border-radius:20px;padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:9px;background:linear-gradient(140deg,#478bff,#1652d6);box-shadow:4px 7px 0 #153f9c,10px 18px 30px #2463eb25;transform:rotate(10deg)}.calc b{border-radius:6px;background:#e9f1ff;color:#1d57c6;text-align:center;line-height:35px}.orb{position:absolute;left:244px;top:12px;width:29px;height:29px;border-radius:50%;background:radial-gradient(circle at 30% 25%,#dbe9ff,#7aafff 30%,#2266ec 65%,#133b93);box-shadow:0 10px 15px #1b51ae20}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:28px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;margin-bottom:20px}.section-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:22px}.step{background:#eef4ff;color:var(--accent);font-weight:700;font-size:16px;min-width:38px;height:38px;display:grid;place-content:center;border-radius:11px;margin-top:4px}h2{font-size:24px;letter-spacing:-.7px;line-height:1.3;margin:0;font-weight:700}.section-head p{color:var(--muted);margin:5px 0 0}label{display:block;font-size:18px;font-weight:600;margin-bottom:7px}input,select{width:100%;height:52px;border:1px solid #b9c9df;border-radius:8px;color:var(--ink);padding:10px 12px;background:#fff;min-width:0}input:focus,select:focus{border-color:var(--accent)}input[aria-invalid=true]{border-color:#b42318;background:#fff8f7}.two{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}.hint{font-size:16px;color:var(--muted);line-height:1.55;margin:15px 0 0}.currency{font-size:13px;color:#586d8d;font-weight:500}.material{background:#f8faff;border:1px solid #e1e9f6;padding:18px;border-radius:10px;margin:0 0 14px;position:relative}.material-top{display:grid;grid-template-columns:1fr 44px;gap:12px;align-items:end}.remove{border:1px solid #cdd9eb;background:#fff;color:#5d6e87;border-radius:8px;height:52px;font-size:25px}.material-fields{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:16px}.material-fields label{font-size:18px}.secondary{background:#fff;border:1px solid #c4d4ec;color:#1b55c8;padding:11px 16px;border-radius:8px;font-weight:600;min-height:48px}.summary{background:#fff;border:1px solid #d7e2f5;box-shadow:0 12px 30px #255cb409;border-radius:16px;padding:27px;position:relative;border-top:4px solid var(--accent)}.summary h2{margin:14px 0 7px;overflow-wrap:anywhere}.example-note{font-size:15px;color:#60728b;margin:0 0 24px}.big-cost{background:#eef4ff;border-radius:12px;padding:22px;display:flex;flex-direction:column;color:#184cbb}.big-cost>span{font-size:17px;font-weight:600}.big-cost strong{font-size:38px;line-height:1.3;letter-spacing:-1.5px;margin:6px 0;overflow-wrap:anywhere}.big-cost small{font-size:15px;color:#536f9b}.breakdown{padding:20px 0}.breakdown>div{display:flex;justify-content:space-between;gap:10px;margin:12px 0;font-size:17px}.breakdown b{font-weight:600;overflow-wrap:anywhere;text-align:right}.key{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:9px}.materials-key,.bar i:nth-child(1){background:#2463eb}.time-key,.bar i:nth-child(2){background:#769aeb}.packaging-key,.bar i:nth-child(3){background:#b0c6f4}.other-key,.bar i:nth-child(4){background:#d4e0f7}.total{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;gap:10px;font-size:17px}.total strong{font-size:20px;overflow-wrap:anywhere;text-align:right}.bar{display:flex;height:7px;border-radius:6px;overflow:hidden;margin:19px 0 26px;background:#edf2fa}.primary{display:flex;justify-content:space-between;gap:10px;width:100%;border:0;border-radius:9px;background:var(--accent);color:#fff;padding:15px;font-size:16px;font-weight:600;box-shadow:0 4px 0 #174ccd}.primary:hover{background:#174ccd}.primary:disabled{opacity:.5;cursor:not-allowed}.summary-note{font-size:15px;color:var(--muted);line-height:1.6;margin:20px 0 0}.aside-note{display:flex;gap:14px;margin:24px 5px}.aside-note>span{font-size:26px;color:var(--accent)}h3{font-size:18px;margin:0}.aside-note p{font-size:16px;color:var(--muted);margin:5px 0}.aside-note a{font-weight:600}.bottom-actions{display:flex;gap:20px;flex-wrap:wrap}.text-button{border:0;background:none;padding:8px 0;color:#1e55b6;text-decoration:underline;text-underline-offset:4px;font-size:16px}.how{border-top:1px solid var(--line);margin-top:48px;padding:36px 0}.how h2{margin:12px 0 24px}.how>div:last-child{display:grid;grid-template-columns:repeat(3,1fr);gap:36px}.how b{font-size:18px}.how p{color:var(--muted);font-size:17px;margin-top:8px}footer{border-top:1px solid var(--line);padding:28px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}footer .brand{font-size:23px}footer>span{color:var(--muted);font-size:16px}#error{background:#fff1ef;border:1px solid #f6c0ba;color:#92251b;border-radius:9px;padding:16px;margin:20px 0;font-size:17px}[hidden]{display:none!important}@media(min-width:1000px){aside{position:sticky;top:24px}}@media(max-width:950px){.workspace{grid-template-columns:minmax(0,1fr) 330px;gap:18px}.panel,.summary{padding:22px}.material-fields{grid-template-columns:1fr 1fr}.material-fields>div:nth-child(2){grid-column:1/-1;grid-row:2}.hero{grid-template-columns:1fr 230px}.art{transform:scale(.8);transform-origin:right center}}@media(max-width:760px){.header-inner{padding:18px 20px;gap:14px;min-height:84px;flex-wrap:wrap}.brand{font-size:26px}.badge{font-size:12px;margin-left:auto}.back{display:none}main{padding:0 18px}.hero{display:block;padding:34px 0 28px}.hero h1{letter-spacing:-1.8px;font-size:39px}.hero p{font-size:18px}.art{display:none}.workspace{display:flex;flex-direction:column;gap:24px}.workspace>form,.workspace>aside{width:100%}.panel{padding:20px 17px}.section-head{gap:12px}h2{font-size:23px}.section-head p{font-size:18px}.two{grid-template-columns:1fr;gap:18px}.material{padding:14px}.material-fields{gap:14px}.material-fields label{font-size:18px}.material-fields>div:nth-child(2){grid-row:2}.summary{padding:24px}.summary .big-cost strong{font-size:40px}.how{margin-top:16px}.how>div:last-child{grid-template-columns:1fr;gap:12px}footer{align-items:flex-start;flex-direction:column;gap:7px}.desktop{display:none}.summary-note,.hint,.aside-note p{font-size:16px}}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:28px}.mode{min-height:58px;padding:12px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:9px;color:var(--ink);font-size:18px;font-weight:600}.mode[aria-pressed=true]{background:#edf3ff;border-color:var(--accent);color:#164fbf;box-shadow:inset 0 0 0 1px var(--accent)}.mode:last-child{grid-column:1/-1}.formula{overflow-wrap:anywhere;background:#f7f9fd;border-radius:8px;padding:16px;margin:18px 0;font-size:18px}.art-percent{font-size:130px;font-weight:750;color:#2463eb;transform:rotate(-12deg);text-shadow:6px 8px #d4e2ff;text-align:center}.workspace{grid-template-columns:minmax(0,1fr) 400px}.helper{margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}.helper p{color:var(--muted);margin-bottom:0}.result-detail{margin-top:20px;color:var(--muted);overflow-wrap:anywhere}.how>div:last-child{grid-template-columns:repeat(2,1fr)}@media(max-width:760px){.mode-grid{grid-template-columns:1fr}.mode:last-child{grid-column:auto}.back{display:block;font-size:16px}.badge{display:none}.how>div:last-child{grid-template-columns:1fr}.summary .big-cost strong{font-size:36px}}