body{margin:0;font-family:system-ui;background:#0b0b0c;color:#f4f4f5}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,92vw);margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,11,12,.92);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:850}
.brand .mark{width:28px;height:28px;display:inline-grid;place-items:center;border-radius:999px;background:linear-gradient(135deg, rgba(124,247,193,.22), rgba(166,179,255,.22));border:1px solid rgba(255,255,255,.10)}
.brand small{display:block;font-weight:650;color:rgba(255,255,255,.65);margin-top:2px}
.nav-links{display:flex;gap:16px;color:#b8b8c2;font-weight:650}
.nav-links a{padding:8px 10px;border-radius:12px}
.nav-links a:hover{background:rgba(255,255,255,.05);color:#f4f4f5}
.nav-cta{display:flex;gap:10px;align-items:center}
.nav-toggle{display:none;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.04);color:#f4f4f5;padding:10px 12px;border-radius:12px}
.mobile-menu{border-top:1px solid rgba(255,255,255,.06);padding:12px 0 18px}
.mobile-menu .container{display:grid;gap:10px}
.mobile-menu a{min-height:44px;color:#b8b8c2;padding:12px;border-radius:12px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06)}

.btn{padding:12px 14px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;border:1px solid transparent;cursor:pointer}
.btn-solid{background:linear-gradient(135deg, rgba(124,247,193,.95), rgba(166,179,255,.95));color:#0b0b0c}
.btn-ghost{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);color:#f4f4f5}

.hero{padding:36px 0 18px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
.eyebrow{margin:0 0 10px;color:#b8b8c2;letter-spacing:.22em;font-size:12px}
h1{margin:0 0 12px;font-size:clamp(32px,4.6vw,56px);line-height:1.06}
.lead{color:#b8b8c2;font-size:18px;margin:0 0 14px}
.accent{background:linear-gradient(135deg,#7cf7c1,#a6b3ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.fineprint{margin:12px 0 0;color:rgba(255,255,255,.62);font-size:12.5px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}

.section{padding:34px 0}
.section-head h2{margin:0 0 10px;font-size:clamp(22px,2.8vw,34px)}
.section-head p{margin:0;color:rgba(255,255,255,.72);max-width:80ch}

.panel{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.10);border-radius:18px;padding:16px}
.hero-card{display:flex;flex-direction:column;gap:14px;justify-content:space-between}
.badges{display:flex;gap:8px;flex-wrap:wrap}
.badge{padding:7px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.03);color:rgba(255,255,255,.78);font-weight:800;font-size:12px}

.note-carousel{position:relative;border-radius:22px;overflow:hidden;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.02)}
.note-carousel img{width:100%;height:320px;object-fit:contain;background:rgba(0,0,0,.22)}
.variant-bar{position:absolute;left:12px;right:12px;bottom:12px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.variant-pill{padding:8px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.12);background:rgba(11,11,12,.55);color:rgba(255,255,255,.86);font-weight:800;font-size:12px}
.variant-dots{display:flex;gap:6px}
.variant-dot{width:8px;height:8px;border-radius:999px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.12)}
.variant-dot.active{width:18px;background:linear-gradient(135deg, rgba(124,247,193,.9), rgba(166,179,255,.9))}

.builder{display:grid;grid-template-columns:1fr .9fr;gap:14px;margin-top:16px}
.form label{display:block;margin:10px 0}
.form span{display:block;font-weight:850;margin-bottom:6px;color:rgba(255,255,255,.85)}
input,select,textarea{width:100%;border-radius:14px;padding:13px 12px;border:1px solid rgba(255,255,255,.10);background:rgba(0,0,0,.25);color:#f4f4f5;outline:none}
textarea{min-height:90px;resize:vertical}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.chip-btn{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.03);color:rgba(255,255,255,.86);padding:8px 10px;border-radius:999px;font-weight:850;cursor:pointer}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.10);border-radius:18px;padding:16px}
.card-actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}

/* Split & Merge */
.splitmerge{display:grid;grid-template-columns:1.25fr .75fr;gap:14px;margin-top:14px;align-items:start}
.sm-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start}
.sm-actions{display:flex;gap:10px;flex-wrap:wrap}
.sm-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}
.sm-area-title{font-weight:900;margin-bottom:10px}
.sm-notes{display:grid;gap:10px}
.sm-note{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.03);border-radius:16px;padding:12px;cursor:grab}
.sm-note.selected{border-color:rgba(124,247,193,.55);box-shadow:0 0 0 3px rgba(124,247,193,.12)}
.sm-note-top{display:flex;justify-content:space-between;gap:10px;align-items:center}
.sm-note-title{font-weight:900}
.sm-note-meta{color:rgba(255,255,255,.70);font-size:12px;margin-top:6px}
.sm-note-actions{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}
.sm-target{border:1px dashed rgba(255,255,255,.18);border-radius:18px;padding:12px;min-height:180px;background:rgba(255,255,255,.02);display:grid;gap:10px;align-content:start}
.sm-target.dragover{border-color:rgba(124,247,193,.55);background:rgba(124,247,193,.06)}
.sm-drop-hint{color:rgba(255,255,255,.65);font-size:12px}
.sm-split{margin-top:14px;border-top:1px solid rgba(255,255,255,.08);padding-top:12px}
.sm-split-row{display:grid;grid-template-columns:1fr 1fr 1fr auto;gap:10px;margin-top:10px;align-items:center}
.sm-events{margin-top:14px}
.sm-event-controls{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
.sm-event-list{border:1px solid rgba(255,255,255,.10);border-radius:16px;background:rgba(0,0,0,.18);padding:10px;max-height:260px;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Courier New",monospace;font-size:12px;color:rgba(255,255,255,.78)}
.sm-event{padding:8px;border-bottom:1px solid rgba(255,255,255,.06)}
.sm-event:last-child{border-bottom:0}
.sm-side .sm-proof{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.sm-proof .k{color:rgba(255,255,255,.65);font-size:12px}
.sm-proof .v{font-weight:900}

@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .builder{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .splitmerge{grid-template-columns:1fr}
  .sm-grid{grid-template-columns:1fr}
  .sm-split-row{grid-template-columns:1fr 1fr;grid-auto-rows:auto}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .note-carousel img{height:260px}
}
@media (max-width:560px){
  .lead{font-size:16px}
  .hero-actions .btn{width:100%}
}