:root{
  --primary:#0f70e6; --primary-d:#0b5cc0;
  --bg:#ffffff; --bg-soft:#f5f7fa; --panel:#ffffff; --line:#e6e9ef;
  --txt:#1c2733; --muted:#697586; --accent:#19b36b; --radius:16px;
  --shadow:0 10px 40px -12px rgba(20,40,80,.18);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);color:var(--txt);-webkit-font-smoothing:antialiased;line-height:1.5;
}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.hidden{display:none!important}
.muted{color:var(--muted)}
.accent{color:var(--accent)}
a{color:inherit;text-decoration:none}

/* nav */
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:34px;height:66px}   /* centered container, left-grouped */
.brand{font-weight:800;font-size:1.3rem;letter-spacing:-.4px;display:flex;align-items:center;gap:6px}
.brand-mark{color:var(--primary)}
.brand-dot{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-link{font-weight:600;color:var(--muted);font-size:.95rem}
.nav-link:hover{color:var(--txt)}
.nav-link.active{color:var(--primary)}
.pill{font-size:.7rem;color:var(--muted);border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.btn-pill{background:var(--primary);color:#fff;font-weight:700;padding:9px 20px;border-radius:999px;font-size:.92rem;transition:.15s}
.btn-pill:hover{background:var(--primary-d)}

/* tabs */
.tabs-bar{border-bottom:1px solid var(--line);background:#fff}
.tabs-inner{display:flex;gap:6px}
.tab{background:none;border:none;padding:16px 6px;margin-right:24px;font-size:1rem;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;transition:.15s}
.tab:hover{color:var(--txt)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}

/* hero */
.hero{padding:56px 0 36px;background:radial-gradient(1200px 500px at 75% -10%,#eaf2ff 0,transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero-copy h1{font-size:3.4rem;line-height:1.05;font-weight:800;letter-spacing:-1.5px;margin:0 0 6px}
.hero-sub{font-size:1.5rem;font-weight:600;color:var(--txt);margin:0 0 26px}

.dropzone{
  border:2px dashed #c7d2e0;border-radius:22px;background:#fff;box-shadow:var(--shadow);
  padding:30px;text-align:center;max-width:330px;transition:.18s;
}
.dropzone.drag{border-color:var(--primary);background:#f2f7ff}
.dz-hint{margin:14px 0 0;color:var(--muted);font-size:.92rem}

.btn-primary{
  background:var(--primary);color:#fff;border:none;font-weight:700;font-size:1rem;
  padding:13px 26px;border-radius:999px;cursor:pointer;transition:.15s;
  box-shadow:0 10px 24px -10px rgba(15,112,230,.7);
}
.btn-primary:hover{background:var(--primary-d);transform:translateY(-1px)}
.btn-primary.lg{font-size:1.1rem;padding:15px 34px}
.btn-primary.block{width:100%;display:block}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--txt);padding:11px;border-radius:12px;cursor:pointer;font-weight:600}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost.block{width:100%;display:block}

.samples{margin-top:26px}
.samples-label{font-size:.85rem;color:var(--muted);display:block;margin-bottom:10px}
.sample-row{display:flex;gap:12px}
.sample{padding:0;border:2px solid var(--line);border-radius:14px;overflow:hidden;cursor:pointer;background:none;width:64px;height:64px;transition:.15s}
.sample img{width:100%;height:100%;object-fit:cover;display:block}
.sample:hover{border-color:var(--primary);transform:translateY(-2px)}
.terms{margin-top:18px;font-size:.76rem;color:#9aa6b5;max-width:30em}
.sample-more{margin-top:12px;flex-wrap:wrap;max-width:420px}
.link-btn{background:none;border:none;color:var(--primary);font-weight:600;font-size:.85rem;cursor:pointer;padding:10px 0 0;display:inline-block}
.link-btn:hover{text-decoration:underline}
.sample-empty{font-size:.8rem;color:var(--muted);margin-top:10px}

.hero-art{display:flex;justify-content:center}
.art-stage{
  width:100%;max-width:420px;aspect-ratio:4/5;border-radius:26px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#ffd166,#ff8fab 45%,#8e7dff 100%);box-shadow:var(--shadow);
  display:flex;align-items:flex-end;justify-content:center;
}
.art-cutout{max-width:100%;max-height:100%;object-fit:contain;filter:drop-shadow(0 14px 24px rgba(0,0,0,.25))}

/* checker */
.checker{
  background-image:
    linear-gradient(45deg,#e2e6ec 25%,transparent 25%),
    linear-gradient(-45deg,#e2e6ec 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#e2e6ec 75%),
    linear-gradient(-45deg,transparent 75%,#e2e6ec 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0;background-color:#f3f5f8;
}

/* editor */
.editor{padding:10px 0 50px}
.editor-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
.preview-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.preview{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center}

/* before/after compare slider — two stacked layers, result clipped via JS */
.compare{position:relative;display:inline-block;max-width:100%;line-height:0;user-select:none;touch-action:none;cursor:ew-resize}
.cmp-base{display:block;max-width:100%;max-height:72vh}
/* result sits on top, full size; its OWN checker background shows through
   transparent (cut-out) areas so the result side looks different to original */
.cmp-top{position:absolute;top:0;left:0;width:100%;height:100%;clip-path:inset(0 0 0 50%)}
.cmp-handle{position:absolute;top:0;bottom:0;left:50%;width:0;cursor:ew-resize;z-index:3}
.cmp-line{position:absolute;top:0;bottom:0;left:-1.5px;width:3px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.15)}
.cmp-grip{position:absolute;top:50%;left:-18px;width:36px;height:36px;transform:translateY(-50%);
  background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:var(--primary);font-weight:700;font-size:.95rem;box-shadow:0 3px 10px rgba(0,0,0,.25)}
.cmp-tag{position:absolute;bottom:12px;font-size:.72rem;font-weight:700;letter-spacing:.5px;color:#fff;
  background:rgba(20,30,45,.6);padding:4px 10px;border-radius:999px;z-index:2;pointer-events:none}
.cmp-tag-l{left:12px}
.cmp-tag-r{right:12px}
.spinner{position:absolute;inset:0;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;background:rgba(255,255,255,.78);color:var(--muted);font-size:.9rem}
.ring{width:38px;height:38px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--primary);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.controls{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:18px;box-shadow:var(--shadow)}
.ctrl-block{display:flex;flex-direction:column;gap:8px}
.ctrl-label{font-size:.82rem;font-weight:600;color:var(--muted)}
select{background:#fff;color:var(--txt);border:1px solid var(--line);border-radius:10px;padding:10px 11px;font-size:.9rem}
input[type=range]{width:100%;accent-color:var(--primary)}

.bg-swatches{display:flex;gap:9px;flex-wrap:wrap}
.swatch{width:32px;height:32px;border-radius:9px;border:2px solid var(--line);cursor:pointer;padding:0;position:relative}
.swatch.active{border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,112,230,.3)}
.swatch-transparent{
  background-image:linear-gradient(45deg,#bbb 25%,transparent 25%),linear-gradient(-45deg,#bbb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#bbb 75%),linear-gradient(-45deg,transparent 75%,#bbb 75%);
  background-size:10px 10px;background-position:0 0,0 5px,5px -5px,-5px 0;background-color:#fff;
}
.swatch-custom{overflow:hidden;display:flex;align-items:center;justify-content:center}
.swatch-custom input[type=color]{width:160%;height:160%;border:none;padding:0;background:none;cursor:pointer}

/* add-background block */
.addbg{border:1px solid var(--line);border-radius:12px;padding:14px;background:#fafbfd;gap:10px}
.addbg-tabs{display:flex;gap:6px}
.addbg-tab{flex:1;background:#eef2f7;border:none;padding:8px;border-radius:9px;font-weight:600;color:var(--muted);cursor:pointer;font-size:.82rem}
.addbg-tab.active{background:var(--primary);color:#fff}
.addbg-name{font-size:.76rem;display:block;margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.addbg-input{width:100%;border:1px solid var(--line);border-radius:9px;padding:9px 11px;font-size:.88rem}
.addbg small{display:block;margin-top:6px;font-size:.72rem}

.btn-download{background:var(--accent);color:#fff;font-weight:700;text-align:center;padding:13px;border-radius:12px;cursor:pointer;transition:.15s}
.btn-download:hover{filter:brightness(1.06)}
.btn-download.disabled{opacity:.45;pointer-events:none}

/* features */
.features{border-top:1px solid var(--line);padding:50px 0;background:var(--bg-soft)}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.feat-ico{font-size:1.7rem}
.feat h3{margin:10px 0 6px;font-size:1.1rem}
.feat p{margin:0;color:var(--muted);font-size:.92rem}

/* erase tab */
.erase-hero{padding:40px 0 50px}
.erase-head{text-align:center;margin-bottom:26px}
.erase-head h1{font-size:2.6rem;font-weight:800;letter-spacing:-1px;margin:0 0 6px}
.erase-hero .hero-grid{align-items:start}      /* top-align with the upload column */
/* big upload box on the left, matching the image frame on the right */
#erase-dropzone,#dropzone{max-width:none;width:100%;min-height:380px;display:flex;
  flex-direction:column;align-items:center;justify-content:center;gap:10px}

/* demo clip placeholder (shown until the video file exists) */
.erase-demo{position:relative}
.erase-demo .demo-ph{display:none}
.erase-demo.novid video{display:none}
.erase-demo.novid .demo-ph{display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:6px;height:340px;border:2px dashed #c7d2e0;border-radius:18px;background:#f7f9fc;color:var(--muted)}
.demo-ph-ico{font-size:2rem}
.demo-ph p{margin:0;font-weight:600}
.demo-ph small{color:#9aa6b5}
.demo-ph code{background:#eef2f7;padding:1px 6px;border-radius:5px;font-size:.8em}
.erase-art{display:flex;flex-direction:column;gap:18px}   /* samples on top, then showcase */
.erase-art .erase-showcase{width:100%}
.erase-try{align-self:center}                  /* centred under the image */
.erase-demo-wrap{display:flex;justify-content:center;margin-top:10px}
.erase-samples{text-align:center}
.erase-samples .sample-row{justify-content:center}
.erase-showcase{width:100%;display:flex;flex-direction:column;align-items:center;gap:14px}
.erase-showcase .preview-wrap{width:100%}
.erase-showcase .preview{min-height:auto}
.erase-demo{margin:0;width:1100px;max-width:100%}
.erase-demo video{width:100%;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);display:block;background:#000}
.erase-demo-ico{font-size:2rem}
.erase-demo-ph p{margin:0;font-weight:600}
.erase-demo-ph small{color:#9aa6b5}
.erase-demo-ph code{background:#eef2f7;padding:1px 6px;border-radius:5px;font-size:.8em}
.erase-demo figcaption{text-align:center;color:var(--muted);font-size:.82rem;margin-top:10px;font-weight:600}
.erase-editor{padding:0}
.erase-canvas{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center}
.erase-canvas img{max-width:100%;max-height:72vh;display:block;cursor:crosshair}
.erase-tip{margin:0;font-size:.85rem;color:var(--muted);background:#f1f6ff;border:1px solid #d8e6ff;padding:10px 12px;border-radius:10px}

/* use-case gallery */
.usecases{padding:54px 0;border-top:1px solid var(--line)}
.uc-title{text-align:center;font-size:1.8rem;font-weight:800;letter-spacing:-.5px;margin:0 0 22px}
.uc-tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.uc-tab{background:#eef2f7;border:none;padding:9px 20px;border-radius:999px;font-weight:600;color:var(--muted);cursor:pointer;font-size:.92rem;transition:.15s}
.uc-tab:hover{color:var(--txt)}
.uc-tab.active{background:var(--primary);color:#fff}
.uc-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px}
.uc-card{position:relative;aspect-ratio:1;border-radius:16px;overflow:hidden;border:1px solid var(--line);cursor:ew-resize;touch-action:none;user-select:none;transition:.18s}
.uc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.uc-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;pointer-events:none;display:block}
.uc-handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.15);transform:translateX(-1px);pointer-events:none}
.uc-handle span{position:absolute;top:50%;left:50%;width:30px;height:30px;transform:translate(-50%,-50%);border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.3)}
.uc-handle span::before,.uc-handle span::after{content:"";position:absolute;top:50%;width:0;height:0;border-top:5px solid transparent;border-bottom:5px solid transparent;transform:translateY(-50%)}
.uc-handle span::before{left:6px;border-right:7px solid var(--muted)}
.uc-handle span::after{right:6px;border-left:7px solid var(--muted)}
@media (max-width:600px){.uc-gallery{grid-template-columns:1fr 1fr}}

/* API coming soon */
.coming{padding:90px 0;background:radial-gradient(900px 400px at 50% 0,#eaf2ff,transparent 60%)}
.coming-inner{max-width:620px;margin:0 auto;text-align:center}
.coming-badge{display:inline-block;background:var(--primary);color:#fff;font-weight:700;letter-spacing:1px;padding:6px 16px;border-radius:999px;font-size:.8rem}
.coming-inner h1{font-size:3rem;font-weight:800;letter-spacing:-1px;margin:18px 0 10px}
.coming-inner p{color:var(--muted);font-size:1.05rem;margin:0 0 28px}
.code-preview{text-align:left;background:#0e1726;color:#d7e3f4;border-radius:14px;padding:20px 22px;font-size:.86rem;line-height:1.7;overflow:auto;box-shadow:var(--shadow)}
.code-preview code{font-family:SFMono-Regular,Menlo,Consolas,monospace}
.soon-tag{display:inline-block;margin-top:24px;color:var(--muted);font-weight:600}

.footer{border-top:1px solid var(--line);background:var(--bg-soft);color:var(--muted);padding:48px 0 22px;font-size:.9rem;text-align:left}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px}
.footer-brand .brand{font-size:1.2rem;color:var(--txt)}
.footer-tag{margin-top:10px;max-width:22em;color:var(--muted)}
.footer-col h4{color:var(--txt);font-size:.78rem;font-weight:700;margin:0 0 12px;text-transform:uppercase;letter-spacing:.5px}
.footer-col a{display:block;color:var(--muted);padding:5px 0}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:34px;padding-top:20px;flex-wrap:wrap;gap:12px}
.footer-legal{display:flex;gap:18px}
.footer-legal a:hover{color:var(--primary)}
@media (max-width:780px){.footer-grid{grid-template-columns:1fr 1fr}}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-art{display:none}
  .hero-copy h1{font-size:2.5rem}
  .editor-grid{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:1fr}
}