:root{
  --bg:hsl(27 36% 97%);
  --fg:#0b0b0b;
  --muted:#5b6b66;
  --card:#ffffff;
  --border:hsl(30 12% 88%);
  --primary:hsl(173 60% 33%);
  --primary-dark:hsl(173 72% 21%);
  --primary-darker:hsl(173 64% 28%);
  --primary-medium:hsl(173 59% 40%);
  --primary-light:hsl(173 62% 58%);
  --primary-muted:hsl(173 41% 77%);
  --primary-tint:hsl(168 29.4% 96.7%);
  --upload-card:#468a80;
  --upload-inner:#5a9a90;
  --yellow:#fdf0b2;
  --hero-green:hsl(147 100% 93%);
  --sidebar:hsl(0 0% 97.5%);
  --roll:#111111;
  --rh:#5aa6f0;
  --rh-active:#7cc0ff;
  --lh:#3cc7a3;
  --lh-active:#63e0bf;
  --radius:.5rem;
  --shadow:0 1px 2px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);
  font-family:"DM Sans",ui-sans-serif,system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select{font:inherit}
.hidden{display:none!important}
svg.i{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* ---------- header ---------- */
.nav{max-width:1200px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;gap:32px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:500;letter-spacing:-.01em}
.logo svg{width:26px;height:26px}
.nav .links{display:flex;gap:24px;color:#333;font-size:16px}
.nav .links a:hover{color:var(--primary)}
.nav .right{margin-left:auto;display:flex;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius);padding:10px 16px;font-weight:500;font-size:15px;transition:.15s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-darker)}
.btn-primary:disabled{background:var(--primary-muted);cursor:not-allowed}
.btn-ghost{color:#333}
.btn-ghost:hover{background:rgba(0,0,0,.05)}
.btn-outline{border:1px solid var(--border);background:#fff}
.btn-outline:hover{background:#f6f6f6}

/* ---------- hero ---------- */
.banner{display:flex;justify-content:center;margin-top:8px}
.banner .pill{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid hsl(160 40% 88%);border-radius:999px;padding:6px 6px 6px 22px;font-weight:500;font-size:15px;box-shadow:0 0 0 4px rgba(255,255,255,.6)}
.banner .pill a{background:linear-gradient(90deg,var(--primary-medium),hsl(160 50% 50%));color:#fff;border-radius:999px;padding:8px 18px;display:flex;gap:6px;align-items:center}
.hero{text-align:center;padding:48px 24px 0}
.hero h1{font-size:clamp(34px,6.4vw,76px);line-height:1.05;margin:0;font-weight:700;letter-spacing:-.02em}
.hero h1 .typed{color:var(--primary-darker)}
.hero h1 .caret{display:inline-block;width:.07em;height:.9em;background:var(--primary-darker);vertical-align:-.08em;margin-left:2px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.hero p.sub{font-size:20px;margin:18px auto 0;color:#222}
.stage{position:relative;margin-top:36px;padding-bottom:80px;background:linear-gradient(180deg,transparent 0,var(--hero-green) 45%,transparent 100%)}
.wave{position:absolute;left:0;top:40px;bottom:120px;width:36%;display:flex;align-items:center;gap:6px;overflow:hidden;opacity:.95}
.wave span{flex:none;width:7px;border-radius:4px;background:linear-gradient(var(--primary-medium),var(--primary-dark))}
.floaters{position:absolute;right:0;top:20px;bottom:100px;width:38%;overflow:hidden;pointer-events:none}
.floaters .bar{position:absolute;height:26px;border:3px solid hsl(160 20% 85%);border-radius:6px}
.floaters .n{position:absolute;color:#1b3b37;font-weight:700}
.upload-card{position:relative;z-index:2;width:min(556px,calc(100% - 32px));margin:0 auto;background:var(--upload-card);border-radius:10px;padding:28px;color:#fff;box-shadow:var(--shadow)}
.drop{border:2px dashed rgba(255,255,255,.55);border-radius:6px;padding:40px 20px 50px;text-align:center;transition:.15s}
.drop.over{background:rgba(255,255,255,.08);border-color:#fff}
.drop svg{width:42px;height:42px;margin-bottom:28px}
.btn-yellow{background:var(--yellow);color:#111;font-weight:600;font-size:18px;padding:18px 56px;border-radius:6px}
.btn-yellow:hover{filter:brightness(.97)}
.drop small{display:block;margin-top:18px;font-size:16px;color:rgba(255,255,255,.9)}
.or{display:flex;align-items:center;gap:16px;margin:18px 0;color:#d8d8a8;font-weight:600}
.or:before,.or:after{content:"";flex:1;height:1px;background:#c9c99a;opacity:.7}
.url{display:flex;align-items:center;gap:10px;border:2px solid #7fd0c2;border-radius:6px;padding:10px 14px;background:var(--upload-inner)}
.url input{flex:1;background:none;border:0;outline:0;color:#fff;font-size:18px;font-weight:500;min-width:0}
.url input::placeholder{color:rgba(255,255,255,.92)}
.url .ico{display:flex;gap:6px}
.url .go{background:#fff;color:var(--primary-dark);border-radius:5px;padding:6px 12px;font-weight:600}
.rec{width:100%;background:hsl(172 45% 25%);color:#fff;border-radius:6px;padding:20px;font-size:17px;display:flex;justify-content:center;gap:10px;align-items:center}
.rec.on{background:#b42318}
.progress{margin-top:16px}
.progress .track{height:6px;background:rgba(255,255,255,.25);border-radius:4px;overflow:hidden}
.progress .fill{height:100%;background:#fff;width:0;transition:width .2s}

/* ---------- sections ---------- */
.section{max-width:1140px;margin:0 auto;padding:72px 24px}
.section h2{font-size:clamp(28px,4vw,44px);margin:0 0 12px;letter-spacing:-.02em}
.section .lead{color:var(--muted);font-size:18px;margin:0 0 36px}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature{background:#fff;border-radius:12px;padding:28px;box-shadow:var(--shadow)}
.feature .ic{width:56px;height:56px;border-radius:10px;background:var(--primary-tint);display:grid;place-items:center;color:var(--primary);margin-bottom:24px}
.feature h3{font-size:22px;margin:0 0 10px}
.feature p{margin:0;color:#444;line-height:1.5}
.formats{display:grid;grid-template-columns:280px 1fr;gap:32px;align-items:start}
.formats .tabs{display:flex;flex-direction:column;gap:8px}
.formats .tabs button{text-align:left;padding:16px 18px;border-radius:10px;font-weight:600;font-size:18px;color:#555}
.formats .tabs button.on{background:#fff;color:var(--primary-dark);box-shadow:var(--shadow)}
.formats .panel{background:#fff;border-radius:14px;padding:32px;box-shadow:var(--shadow)}
.formats .panel ul{padding-left:20px;line-height:1.9}
.examples{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.ex{background:#fff;border-radius:12px;padding:22px;box-shadow:var(--shadow);display:block;transition:.15s}
.ex:hover{transform:translateY(-2px)}
.ex .tag{font-size:12px;font-weight:700;color:var(--primary);letter-spacing:.06em}
.ex h4{margin:8px 0 4px;font-size:18px}
.ex p{margin:0;color:var(--muted);font-size:14px}
.faq details{background:#fff;border-radius:10px;padding:18px 22px;margin-bottom:10px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.faq summary{font-weight:600;font-size:17px;cursor:pointer;list-style:none;display:flex;justify-content:space-between}
.faq summary:after{content:"+";color:var(--primary);font-size:22px;line-height:1}
.faq details[open] summary:after{content:"−"}
.faq p{color:#444;line-height:1.6;margin:12px 0 0}
.cta{text-align:center;background:var(--primary-dark);color:#fff;border-radius:18px;padding:56px 24px}
.cta h2{color:#fff}
footer{border-top:1px solid var(--border);margin-top:40px}
footer .in{max-width:1140px;margin:0 auto;padding:36px 24px;display:flex;gap:40px;flex-wrap:wrap;color:var(--muted);font-size:14px}
footer .in>div{min-width:160px}
footer h5{color:#111;margin:0 0 10px;font-size:14px}
footer a{display:block;padding:3px 0}

/* ---------- modal / wizard ---------- */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:50;display:grid;place-items:center;padding:16px}
.modal{background:#fff;border-radius:10px;width:min(676px,100%);max-height:calc(100vh - 32px);overflow:auto;padding:22px 22px 18px;position:relative}
.modal h3{margin:0 0 18px;font-size:19px}
.modal .x{position:absolute;right:14px;top:14px;color:#555}
.inst-grid{display:grid;grid-template-columns:repeat(4,132px);gap:12px;justify-content:center}
.inst{position:relative;border:1px solid var(--border);border-radius:6px;height:70px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;font-weight:500;font-size:14px}
.inst:hover{border-color:var(--primary-light)}
.inst.on{border:2px solid var(--primary);background:var(--primary-tint)}
.inst .beta{position:absolute;top:4px;right:6px;background:#dbe8ff;color:#2a56c6;border-radius:999px;font-size:10px;padding:1px 8px;font-weight:600}
.inst svg{width:22px;height:22px}
.inst.full{grid-column:2/4;width:132px;justify-self:center}
.adv{margin:18px 0 0;border:1px solid var(--border);border-radius:6px;padding:26px 20px 18px;position:relative}
.adv-toggle{display:flex;justify-content:center;margin-top:16px}
.adv-toggle button{border:1px solid var(--border);border-radius:5px;padding:4px 10px;font-size:13px;display:flex;gap:6px;align-items:center;background:#fff}
.adv .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.adv label{display:block;font-size:13px;margin-bottom:6px}
.adv select,.adv input{width:100%;border:1px solid var(--border);border-radius:5px;padding:8px 10px;background:#fff}
.chk{display:flex;align-items:center;gap:8px;font-size:13px;margin-top:12px}
.options{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:8px}
.opt{border:1px solid var(--border);border-radius:5px;padding:12px;text-align:left;font-size:14px;font-weight:500}
.opt.on{border:2px solid var(--primary);background:var(--primary-tint)}
.opt small{display:block;color:var(--muted);font-weight:400;margin-top:4px;font-size:12px}
.modal .foot{display:flex;justify-content:space-between;align-items:center;margin-top:22px}
.modal .foot .btn-primary{padding:11px 22px}
.copyright{text-align:center;font-size:13px;color:#333;line-height:1.5}
.copyright .shield{color:var(--primary-medium);margin:10px auto}
.copyright .box{border:1px solid hsl(160 30% 85%);border-radius:6px;padding:14px;display:flex;gap:12px;align-items:center;text-align:left;margin:10px 30px}
.copyright .box input{width:16px;height:16px;accent-color:var(--primary)}
.muted{color:var(--muted)}

/* ---------- app shell (viewer / projects) ---------- */
.shell{display:grid;grid-template-columns:240px 1fr;height:100vh;overflow:hidden;background:#fff}
.shell.collapsed{grid-template-columns:0 1fr}
.side{background:var(--sidebar);border-right:1px solid #eee;display:flex;flex-direction:column;padding:10px 8px;overflow:hidden}
.side .top{display:flex;justify-content:space-between;align-items:center;padding:4px 6px 14px}
.side .new{width:100%;justify-content:flex-start;padding:9px 12px}
.side nav a{display:flex;gap:10px;align-items:center;padding:9px 10px;border-radius:6px;font-size:15px}
.side nav a:hover{background:#ececec}
.side h6{margin:18px 10px 6px;font-size:12px;color:#777;font-weight:500}
.side .recent a{display:block;padding:6px 10px;border-radius:6px;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side .recent a.on,.side .recent a:hover{background:#ececec}
.side .promo{margin-top:auto;background:#fff;border:1px solid #eee;border-radius:8px;padding:12px;font-size:12px}
.side .promo b{display:block;font-size:14px;margin-bottom:6px}
.main{display:flex;flex-direction:column;min-width:0;overflow:hidden}
.topbar{display:flex;align-items:center;gap:16px;padding:6px 14px;border-bottom:1px solid #eee;min-height:56px}
.topbar .t{min-width:0;flex:1}
.topbar .t b{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.diff{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:12px;margin-top:3px;position:relative}
.diff select{border:0;background:none;font-weight:500;font-size:12px;outline:0}
.stars{display:flex;align-items:center;gap:6px;color:#888;font-size:14px}
.stars button{color:#bbb;font-size:20px;line-height:1;padding:0 1px}
.stars button.on{color:#f5b301}
.menu{position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid #eee;border-radius:8px;box-shadow:var(--shadow);min-width:220px;padding:6px;z-index:30}
.menu button,.menu a{display:flex;width:100%;gap:10px;align-items:center;padding:9px 10px;border-radius:6px;font-size:14px;text-align:left}
.menu button:hover,.menu a:hover{background:#f3f3f3}
.menu small{margin-left:auto;color:#999}
.work{flex:1;display:flex;flex-direction:column;min-height:0;position:relative}
.sheetwrap{flex:1;position:relative;min-height:120px}
.sheet{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;background:#fff}
.sheet .viewmode{position:sticky;top:8px;float:right;margin-right:12px;display:flex;background:#f1f1f1;border-radius:6px;padding:2px;z-index:5;font-size:13px}
.sheet .viewmode button{padding:4px 12px;border-radius:5px;position:relative}
.sheet .viewmode button.on{background:#222;color:#fff}
.sheet .viewmode .soon{color:#aaa;cursor:default}
.sheet .viewmode .soon:after{content:"YAKINDA";position:absolute;top:-9px;right:2px;font-size:7px;color:#999}
#at{min-height:200px;padding:6px 20px 80px}
.at-cursor-bar{background:rgba(60,199,163,.12)}
.at-cursor-beat{background:var(--lh);width:3px}
.at-highlight *{fill:var(--primary)!important;stroke:var(--primary)!important}
.tools{position:absolute;right:14px;bottom:10px;display:flex;align-items:center;gap:2px;background:#fff;border:1px solid #e7e7e7;border-radius:8px;padding:3px;z-index:6;font-size:13px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.tools button{padding:5px 8px;border-radius:5px;display:flex;gap:5px;align-items:center}
.tools button:hover{background:#f2f2f2}
.tools button.on{background:#222;color:#fff}
.tools .sep{width:1px;height:18px;background:#e5e5e5;margin:0 4px}
.split{position:absolute;left:50%;transform:translate(-50%,-50%);z-index:7;display:flex;background:#fff;border:1px solid #e5e5e5;border-radius:7px;padding:3px;gap:2px}
.split button{padding:4px 6px;border-radius:5px;color:#777}
.split button.on{background:#333;color:#fff}
.rollwrap{height:42%;min-height:180px;background:var(--roll);position:relative;flex:none}
.rollwrap.only{height:100%}
.rollwrap canvas{width:100%;height:100%;display:block}
.rollbar{position:absolute;right:12px;top:10px;display:flex;gap:8px;z-index:3}
.seg{display:flex;background:#222;border:1px solid #333;border-radius:7px;padding:2px;font-size:12px}
.seg button{color:#aaa;padding:5px 9px;border-radius:5px}
.seg button.on{background:#e9e9e9;color:#111}
.thumb{position:absolute;left:14px;bottom:14px;width:286px;aspect-ratio:16/9;background:#000 center/cover;border-radius:6px;z-index:3;box-shadow:0 4px 16px rgba(0,0,0,.5);overflow:hidden}
.thumb .lbl{position:absolute;left:8px;bottom:6px;color:#fff;font-size:12px;text-shadow:0 1px 3px #000}
.transport{background:var(--primary-darker);color:#fff;display:flex;align-items:center;justify-content:center;gap:14px;padding:8px 16px;position:relative;flex:none}
.transport .src{display:flex;background:hsl(173 50% 20%);border-radius:7px;padding:3px}
.transport .src button{padding:5px 14px;border-radius:5px;font-size:13px;color:#cde}
.transport .src button.on{background:#fff;color:#111}
.transport .play{width:34px;height:34px;border-radius:50%;background:#fff;color:var(--primary-dark);display:grid;place-items:center}
.transport .time{font-size:13px;min-width:90px;font-variant-numeric:tabular-nums}
.transport .r{position:absolute;right:16px;display:flex;gap:16px;align-items:center}
.ctl{display:flex;flex-direction:column;align-items:center;font-size:10px;gap:2px;opacity:.95}
.ctl .row{display:flex;align-items:center;gap:6px}
.ctl .row button{width:22px;height:22px;border-radius:50%;border:1px solid rgba(255,255,255,.5);display:grid;place-items:center}
.ctl .val{min-width:34px;text-align:center;font-size:13px;font-weight:600}
.ctl .valbox{border:1px solid rgba(255,255,255,.6);border-radius:999px;padding:3px 10px}
.ctl.toggle.on{color:#ffe58a}
.status{position:absolute;inset:0;background:#fff;z-index:10;display:flex;flex-direction:column;align-items:center;padding:30px 40px;overflow:hidden}
.status .skel{width:min(900px,100%);height:58px;border-radius:6px;background:linear-gradient(90deg,#f1f2f3,#f8f8f8,#f1f2f3);background-size:200% 100%;animation:sh 1.4s linear infinite;margin-bottom:22px}
@keyframes sh{to{background-position:-200% 0}}
.status .card{position:absolute;top:38%;left:50%;transform:translate(-50%,-50%);background:#fff;border:1px solid #e8e8e8;border-radius:12px;padding:24px 28px;width:min(440px,90%);box-shadow:var(--shadow);text-align:center}
.status .card h4{margin:0 0 6px;font-size:18px}
.status .bar{height:8px;background:#eef2f1;border-radius:6px;overflow:hidden;margin:16px 0 8px}
.status .bar div{height:100%;background:var(--primary);transition:width .5s}
.status .err{color:#b42318}
.projects{padding:32px;overflow:auto}
.projects h1{font-size:28px;margin:0 0 20px}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.pcard{border:1px solid #eee;border-radius:10px;overflow:hidden;background:#fff}
.pcard .img{aspect-ratio:16/9;background:var(--primary-tint) center/cover;display:grid;place-items:center;color:var(--primary)}
.pcard .b{padding:12px}
.pcard .b b{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pcard .b span{font-size:12px;color:#888}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#111;color:#fff;padding:10px 16px;border-radius:8px;font-size:14px;z-index:99}

@media (max-width:900px){
  .features{grid-template-columns:1fr}
  .formats{grid-template-columns:1fr}
  .wave,.floaters{display:none}
  .inst-grid{grid-template-columns:repeat(2,1fr)}
  .inst.full{grid-column:1/3;width:auto}
  .options{grid-template-columns:1fr}
  .nav .links{display:none}
  .shell{grid-template-columns:0 1fr}
  .side{display:none}
  .stars,.thumb{display:none}
  .transport .r{position:static}
  .transport{flex-wrap:wrap}
  .adv .row{grid-template-columns:1fr}
}
.rollwrap.sheetonly .rollbar,.rollwrap.sheetonly .thumb,.rollwrap.sheetonly canvas{display:none}