:root{--ink:#242329;--muted:#75747c;--line:#e9e8ee;--soft:#f6f6f8;--brand:#6757f6;--mint:#65ecc9;--sidebar:72px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px "DM Sans",Arial,sans-serif;background:#fff}button,input,select{font:inherit}button{cursor:pointer}a{text-decoration:none;color:inherit}.sidebar{position:fixed;z-index:20;left:0;top:0;bottom:0;width:var(--sidebar);background:#f4f6f8;border-right:1px solid #eef0f2;display:flex;flex-direction:column;align-items:center;padding:20px 8px 15px}.mark{width:34px;height:34px;border:2px solid #242329;border-radius:50%;display:grid;place-items:center;margin-bottom:28px}.mark:before{content:"";width:16px;height:16px;border:4px solid #242329;border-top-color:transparent;border-radius:50%;transform:rotate(-28deg)}.side-link{width:56px;min-height:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;color:#484851;font-size:11px;border-radius:13px;margin:2px 0}.side-link.active{background:#fff;box-shadow:0 3px 12px rgba(40,37,65,.07)}.side-icon{font-size:22px}.side-spacer{flex:1}.topbar{height:72px;margin-left:var(--sidebar);display:flex;align-items:center;justify-content:space-between;padding:0 32px;border-bottom:1px solid #f2f1f5;background:rgba(255,255,255,.94);position:sticky;top:0;z-index:15;backdrop-filter:blur(10px)}.nav,.top-actions{display:flex;align-items:center;gap:28px}.nav a{font-size:14px;color:#4d4b53}.nav a:after{content:"⌄";font-size:13px;margin-left:7px}.nav a:last-child:after{display:none}.top-actions{gap:12px}.primary-small{border:0;color:#fff;background:var(--ink);border-radius:9px;padding:11px 17px;font-weight:600}.wrap{width:min(1080px,calc(100% - 48px));margin:0 auto}main,footer{margin-left:var(--sidebar)}.crumbs{padding-top:18px;color:#8c8a92;font-size:14px}.crumbs b{color:#3b3941;margin-left:8px}.hero{text-align:center;padding:30px 0 20px}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:14px;font-weight:700;background:#f1efff;padding:7px 12px;border-radius:99px}.hero h1{font-size:44px;line-height:1.12;letter-spacing:-1.6px;margin:16px 0 10px}.hero p{max-width:750px;margin:0 auto;color:var(--muted);line-height:1.55;font-size:17px}.tool-grid{display:grid;grid-template-columns:1fr 1.18fr;gap:18px;margin-top:30px}.demo-card,.upload-card{border-radius:22px;min-height:320px;overflow:hidden}.demo-card{position:relative;background:#e8e6e2}.demo-card img{width:100%;height:100%;object-fit:cover;display:block}.half-label{position:absolute;top:16px;background:rgba(33,32,38,.72);color:#fff;padding:6px 10px;border-radius:8px;font-size:12px}.label-before{left:16px}.label-after{right:16px}.demo-card:after{content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;background:rgba(255,255,255,.85)}.upload-card{border:1px solid #e2e0e8;padding:14px;background:#fff}.dropzone{height:100%;border:1.5px dashed #cbc8d6;border-radius:15px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;transition:.2s;background:linear-gradient(180deg,#fff,#fbfaff)}.dropzone.drag{border-color:var(--brand);background:#f6f4ff}.upload-icon{width:52px;height:52px;border-radius:16px;background:#eeebff;color:var(--brand);display:grid;place-items:center;margin-bottom:14px;font-size:26px}.upload{border:0;background:linear-gradient(135deg,var(--mint),#72eed4);color:#182824;border-radius:11px;padding:14px 25px;font-weight:700;box-shadow:0 7px 17px rgba(101,236,201,.22)}.drop-copy{font-size:13px!important;color:#8b8992!important;margin:16px 0!important}.sample{border:0;background:#f3f1fb;border-radius:10px;padding:9px 14px;color:var(--brand);font-size:13px;font-weight:600}.editor{display:none;margin:30px 0 0;border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#f7f7f9;grid-template-columns:minmax(0,1fr) 310px;min-height:495px;text-align:left}.editor.show{display:grid}.canvas-wrap{position:relative;display:flex;align-items:center;justify-content:center;padding:24px;min-width:0;background:linear-gradient(45deg,#eee 25%,transparent 25%) 0 0/24px 24px,linear-gradient(45deg,transparent 75%,#eee 75%) 0 0/24px 24px,linear-gradient(45deg,transparent 75%,#eee 75%) 12px -12px/24px 24px,linear-gradient(45deg,#eee 25%,#fff 25%) 12px 12px/24px 24px}.canvas-stack{position:relative;width:100%;max-width:100%;max-height:520px;overflow:hidden;box-shadow:0 12px 28px rgba(29,27,46,.14);touch-action:none}.canvas-stack canvas{display:block;max-width:100%;max-height:520px;height:auto}.canvas-stack #after{width:100%}.before-layer{position:absolute;inset:0;overflow:hidden;width:50%;border-right:2px solid white;pointer-events:none}.before-layer canvas{max-width:none}.compare-knob{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:38px;height:38px;border-radius:50%;background:#fff;box-shadow:0 3px 14px rgba(0,0,0,.2);display:grid;place-items:center;font-weight:700;color:#666;pointer-events:none}.canvas-stack.paint .before-layer,.canvas-stack.paint .compare-knob{display:none}.controls{background:#fff;border-left:1px solid var(--line);padding:24px;display:flex;flex-direction:column;gap:13px}.controls h2{font-size:20px;margin:0}.controls p{font-size:13px;line-height:1.45;color:var(--muted);margin:0}.field{display:grid;gap:8px}.field label{display:flex;justify-content:space-between;font-size:14px;font-weight:600}.field output{color:var(--brand)}input[type=range]{width:100%;accent-color:var(--brand)}.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;background:#f4f3f7;padding:4px;border-radius:10px}.modes button{border:0;background:transparent;border-radius:8px;padding:9px 4px;font-size:12px}.modes button.active{background:#fff;box-shadow:0 2px 8px #0001;color:var(--brand);font-weight:700}.tip{font-size:12px!important;color:#929098!important}.controls-footer{margin-top:auto;display:grid;gap:8px}.export{display:grid;grid-template-columns:1fr 1fr;gap:8px}.export select{min-width:0;padding:10px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:13px}.download{border:0;background:var(--brand);color:#fff;border-radius:11px;padding:13px;font-weight:700}.reset{border:1px solid var(--line);background:#fff;border-radius:11px;padding:11px;font-weight:600}.related{margin:34px 0 70px}.related>p{margin:0 0 10px}.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.feature-chip{background:#f6f6f8;border-radius:13px;padding:17px 18px;font-size:14px;min-height:58px;display:flex;align-items:center}.feature-chip.current{background:#eeeaff;color:var(--brand);font-weight:700}.content{padding:78px 0}.tinted{background:#f8f8fb}.section-head{text-align:center;max-width:730px;margin:0 auto 36px}.section-head h2{font-size:35px;letter-spacing:-1px;line-height:1.2;margin:0 0 12px}.section-head p{color:var(--muted);line-height:1.6;margin:0}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{border:1px solid var(--line);border-radius:20px;padding:25px;background:#fff}.step-num{width:38px;height:38px;border-radius:12px;background:#eeeaff;color:var(--brand);display:grid;place-items:center;font-weight:700}.step h3{font-size:18px;margin:20px 0 8px}.step p{font-size:14px;color:var(--muted);line-height:1.55;margin:0}.caveat{background:#f7f6ff;border:1px solid #e8e4ff;border-radius:17px;padding:20px 24px;color:#575272;line-height:1.55;margin:0 auto 40px;max-width:850px}.faq{max-width:850px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:20px 0}.faq summary{cursor:pointer;font-size:17px;font-weight:600}.faq p{color:var(--muted);line-height:1.6}footer{background:#242329;color:#fff;padding:46px 0}.foot{display:flex;justify-content:space-between;gap:25px;align-items:start}.foot-logo{font-size:24px;font-weight:700}.foot p,.foot a{font-size:14px;color:#aaa8b1;line-height:1.65}.foot-links{display:flex;gap:20px;flex-wrap:wrap}.toast{position:fixed;right:24px;bottom:24px;background:#242329;color:#fff;padding:13px 18px;border-radius:10px;box-shadow:0 10px 30px #0003;transform:translateY(80px);opacity:0;transition:.25s;z-index:40}.toast.show{transform:none;opacity:1}@media(max-width:900px){:root{--sidebar:0px}.sidebar{display:none}.topbar{margin-left:0;padding:0 20px}.wrap{width:min(100% - 30px,1080px)}main,footer{margin-left:0}.hero h1{font-size:36px}.tool-grid,.editor.show{grid-template-columns:1fr}.demo-card{min-height:300px}.controls{border-left:0;border-top:1px solid var(--line)}.feature-row{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:1fr}}@media(max-width:560px){.topbar{height:62px}.nav a:nth-child(n+2){display:none}.hero{padding-top:22px}.hero h1{font-size:31px}.hero p{font-size:15px}.demo-card{min-height:230px}.upload-card{min-height:285px}.feature-row{grid-template-columns:1fr}.content{padding:62px 0}.section-head h2{font-size:29px}.foot{display:block}.foot-links{margin-top:15px}}

.demo-card{--demo-position:50%;touch-action:none;cursor:ew-resize}
.demo-card:after{content:none}
.demo-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}
body[data-tool="glasses"] .demo-image{object-position:center 38%}
.demo-before{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--demo-position)) 0 0)}
.demo-card .half-label{z-index:2;pointer-events:none}
.demo-divider{position:absolute;z-index:2;top:0;bottom:0;left:var(--demo-position);width:2px;background:#fff;box-shadow:0 0 5px #0005;pointer-events:none}
.demo-handle{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:#39d299;color:#10281e;box-shadow:0 4px 14px #0005;font-size:23px;font-weight:700}
.demo-range{position:absolute;z-index:3;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize;touch-action:none}
.demo-card:focus-within .demo-handle{outline:3px solid var(--brand);outline-offset:4px}
.demo-hint{position:absolute;z-index:2;left:50%;bottom:14px;transform:translateX(-50%);border-radius:99px;padding:6px 11px;background:#242329bb;color:#fff;font-size:12px;white-space:nowrap;pointer-events:none}

.ai-panel{display:grid;gap:8px;padding:12px;border:1px solid #e8e4ff;border-radius:12px;background:#f9f8ff}
.ai-button{width:100%;border:0;border-radius:9px;padding:12px 10px;background:var(--brand);color:#fff;font-size:14px;font-weight:700}
.ai-button:disabled{background:#c8c3db;cursor:not-allowed}
.controls .ai-panel p{font-size:12px;line-height:1.4;margin:0}
.controls .ai-panel .ai-disclosure{color:#686572}
.method-guide{margin-top:28px;overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
.method-guide table{width:100%;border-collapse:collapse;min-width:620px;text-align:left}
.method-guide caption{padding:20px 22px 14px;text-align:left;font-size:18px;font-weight:700}
.method-guide th,.method-guide td{padding:14px 22px;border-top:1px solid var(--line);font-size:14px;line-height:1.5}
.method-guide thead th{color:#605d68;background:#faf9fc}
.method-guide tbody th{color:var(--brand);white-space:nowrap}
.tool-facts{max-width:850px;margin:0 auto 28px;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:1fr;gap:12px;list-style:none}
.tool-facts li{min-height:78px;border:1px solid var(--line);border-radius:14px;padding:16px 18px;color:#65626c;line-height:1.45;background:#fff;display:flex;align-items:center}
@media(max-width:700px){.tool-facts{grid-template-columns:1fr}.tool-facts li{min-height:70px}.method-guide th,.method-guide td{padding:12px 16px}}