:root{
  --bg:#0b0d12;--panel:#11141b;--panel2:#171b23;--line:#272c36;--text:#f4f5f7;--muted:#949aa7;
  --accent:#d8ff45;--accent2:#bde82d;--danger:#ff6b6b;--shadow:0 25px 80px rgba(0,0,0,.35);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"DM Sans",sans-serif}
body:before{content:"";position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 75% 10%,rgba(216,255,69,.07),transparent 30%),linear-gradient(transparent 97%,rgba(255,255,255,.018) 98%);background-size:auto,100% 32px}
a{text-decoration:none;color:inherit}.app-shell{max-width:1240px;margin:auto;padding:0 28px}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.brand{display:flex;gap:9px;align-items:center;font:700 21px "Space Grotesk";letter-spacing:-.7px}.brand-mark{display:grid;place-items:center;width:35px;height:35px;background:var(--accent);color:#0b0d12;border-radius:9px;font-size:13px}
.nav{display:flex;gap:34px;color:var(--muted);font-size:14px}.nav a:hover{color:var(--text)}.theme-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);width:38px;height:38px;border-radius:11px;cursor:pointer}
.hero{padding:105px 0 92px;max-width:850px}.eyebrow{font:700 11px "Space Grotesk";letter-spacing:2px;color:var(--accent);margin-bottom:17px}.eyebrow span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:7px}
h1,h2{font-family:"Space Grotesk";letter-spacing:-2.8px;line-height:.98;margin:0}h1{font-size:clamp(52px,7vw,88px)}h1 em,h2 em{color:var(--accent);font-style:normal}h1+p{font-size:19px;color:var(--muted);max-width:650px;line-height:1.6;margin:28px 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{border:0;border-radius:12px;padding:14px 18px;font:700 14px "DM Sans";cursor:pointer}.primary{background:var(--accent);color:#0b0d12}.primary:hover{background:var(--accent2)}.secondary{background:var(--panel2);color:var(--text);border:1px solid var(--line)}.hero-note{margin-top:25px;color:#6f7682;font-size:12px}.pulse{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:7px}
.tools-section{padding:45px 0 105px}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:30px}.section-head h2,.about h2{font-size:43px}.tool-count{color:var(--muted);font-size:13px}.tool-count span{color:var(--line);padding:0 6px}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tool-card{background:linear-gradient(145deg,var(--panel),#0f1218);border:1px solid var(--line);border-radius:18px;padding:24px;min-height:210px;display:flex;flex-direction:column;transition:.2s transform,.2s border-color;cursor:pointer}.tool-card:hover{transform:translateY(-4px);border-color:#414754}.tool-icon{font-size:24px;margin-bottom:25px}.tool-card h3{font:600 20px "Space Grotesk";margin:0 0 9px}.tool-card p{font-size:13px;line-height:1.5;color:var(--muted);margin:0}.tool-footer{margin-top:auto;padding-top:22px;display:flex;justify-content:space-between;color:#6f7682;font-size:12px}.arrow{color:var(--accent);font-size:17px}
.about{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:90px 0;display:grid;grid-template-columns:1fr 1fr;gap:70px}.about-copy p{color:var(--muted);font-size:17px;line-height:1.7;margin:0 0 25px;max-width:520px}.principles{display:flex;gap:10px;flex-wrap:wrap}.principles span{border:1px solid var(--line);border-radius:99px;padding:9px 12px;font-size:12px;color:#c5c9d1}
footer{padding:30px 0;display:flex;justify-content:space-between;color:#6f7682;font-size:12px}footer strong{color:var(--text);margin-right:10px}
dialog{width:min(760px,calc(100% - 30px));border:1px solid var(--line);border-radius:22px;background:var(--panel);color:var(--text);padding:0;box-shadow:var(--shadow)}dialog::backdrop{background:rgba(0,0,0,.72);backdrop-filter:blur(5px)}.dialog-head{padding:30px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:20px}.dialog-head h2{font-size:36px}.dialog-head p{color:var(--muted);margin:10px 0 0;font-size:14px}.close{border:0;background:var(--panel2);color:var(--text);width:38px;height:38px;border-radius:10px;font-size:25px;cursor:pointer}
.calc{padding:30px}.fields{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:12px;color:#aeb3bd}.input-wrap{display:flex;align-items:center;background:#0c0f14;border:1px solid var(--line);border-radius:11px;overflow:hidden}.input-wrap input,.input-wrap select{width:100%;border:0;outline:0;background:transparent;color:var(--text);padding:13px;font:500 14px "DM Sans"}.unit{padding:0 12px;color:#69707c;font-size:12px}.input-wrap:focus-within{border-color:#59616e}.result{margin-top:25px;background:var(--panel2);border:1px solid var(--line);border-radius:15px;padding:22px}.result-label{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:1.4px}.big-number{font:700 42px "Space Grotesk";letter-spacing:-2px;margin:6px 0}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:15px}.mini{border-top:1px solid var(--line);padding-top:13px}.mini span{display:block;color:var(--muted);font-size:11px}.mini strong{font:600 17px "Space Grotesk"}.calc-actions{display:flex;gap:10px;margin-top:15px}.reset{background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:10px;padding:11px 14px;cursor:pointer}
.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);opacity:0;background:var(--accent);color:#0b0d12;font-weight:700;padding:12px 16px;border-radius:10px;font-size:13px;transition:.25s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}
.light{--bg:#f5f6f2;--panel:#fff;--panel2:#eef0eb;--line:#dce0d7;--text:#151713;--muted:#697066;--accent:#9dcc00;--accent2:#8cbb00}.light body:before{display:none}
@media(max-width:800px){.nav{display:none}.hero{padding:75px 0}.tool-grid{grid-template-columns:1fr 1fr}.about{grid-template-columns:1fr;gap:35px}.section-head{align-items:start;gap:20px;flex-direction:column}.fields{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr 1fr}footer{gap:20px;flex-direction:column}}
@media(max-width:520px){.app-shell{padding:0 17px}h1{font-size:49px}.section-head h2,.about h2{font-size:34px}.tool-grid{grid-template-columns:1fr}.tool-card{min-height:180px}.dialog-head{padding:22px}.calc{padding:22px}.result-grid{grid-template-columns:1fr}.hero-actions .btn{width:100%}}
.field .help,.help{color:#737a86;font-size:10px;margin-top:-2px}.result-note{color:var(--muted);font-size:12px;line-height:1.5;margin:18px 0 0}.result-foot{color:var(--muted);font-size:11px;margin-top:16px;min-height:14px}.tool-card:focus-visible,.btn:focus-visible,.theme-btn:focus-visible,.close:focus-visible,.reset:focus-visible{outline:2px solid var(--accent);outline-offset:3px}select{appearance:auto;cursor:pointer}dialog{max-height:90vh;overflow:auto}button{font-family:inherit}
/* V3 — Regginight3D identity & product polish */
.brand-copy{display:flex;flex-direction:column;line-height:1}.brand-copy strong{font:700 21px "Space Grotesk"}.brand-copy small{font-size:8px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-top:4px}.top-actions{display:flex;gap:8px}.search-btn{height:38px;border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:11px;padding:0 10px;display:flex;gap:14px;align-items:center;cursor:pointer}.search-btn kbd,.search-input-wrap kbd{font:600 9px "DM Sans";border:1px solid var(--line);border-radius:5px;padding:3px 5px;color:#747b87;background:var(--bg)}
.hero{max-width:none;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(330px,.7fr);align-items:center;gap:70px}.hero-main{max-width:850px}.hero-panel{background:linear-gradient(150deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:20px;padding:19px;box-shadow:var(--shadow);transform:rotate(1.2deg)}.panel-top{display:flex;justify-content:space-between;color:var(--muted);font:600 10px "Space Grotesk";letter-spacing:.6px;border-bottom:1px solid var(--line);padding-bottom:14px}.status-dot{color:var(--accent)}.status-dot:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:5px}.panel-result{padding:28px 5px 20px}.panel-result small,.panel-result span{display:block;color:var(--muted);font-size:10px}.panel-result strong{display:block;font:700 54px "Space Grotesk";letter-spacing:-3px;color:var(--accent);margin:5px 0}.panel-bars{display:grid;gap:7px;margin:10px 5px 18px}.panel-bars i{display:block;width:var(--w);height:8px;border-radius:99px;background:var(--accent);opacity:.9}.panel-bars i:nth-child(2){opacity:.45}.panel-bars i:nth-child(3){opacity:.22}.panel-legend{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:9px}.panel-legend b{display:inline-block;width:5px;height:5px;background:var(--accent);border-radius:50%;margin-right:4px}
.trust-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:16px;overflow:hidden;background:rgba(17,20,27,.55);margin-bottom:70px}.trust-strip div{padding:22px;border-right:1px solid var(--line);display:flex;align-items:baseline;gap:9px}.trust-strip div:last-child{border:0}.trust-strip strong{font:700 24px "Space Grotesk";color:var(--accent)}.trust-strip span{font-size:11px;color:var(--muted)}
.text-action{border:0;background:transparent;color:var(--muted);cursor:pointer;font-weight:600}.text-action span{color:var(--accent);margin-left:6px}.category-chips{display:flex;gap:8px;flex-wrap:wrap;margin:-8px 0 22px}.chip{border:1px solid var(--line);background:transparent;color:var(--muted);padding:8px 11px;border-radius:99px;font-size:11px;cursor:pointer}.chip.active{background:var(--accent);color:#0b0d12;border-color:var(--accent);font-weight:700}
.tool-card .favorite{position:absolute;right:18px;top:17px;border:0;background:transparent;color:#59606c;font-size:17px;cursor:pointer}.tool-card{position:relative}.tool-card .favorite.on{color:var(--accent)}.tool-card .badge{display:inline-flex;width:max-content;font-size:9px;padding:4px 7px;border-radius:99px;background:rgba(216,255,69,.1);color:var(--accent);margin-bottom:12px;letter-spacing:.5px}
.next-section{padding:20px 0 110px}.future-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:14px}.future-card{min-height:275px;border:1px solid var(--line);border-radius:18px;padding:23px;background:linear-gradient(145deg,var(--panel),#0f1218);position:relative;overflow:hidden}.future-card.featured{background:radial-gradient(circle at 80% 15%,rgba(216,255,69,.12),transparent 30%),var(--panel)}.future-card h3{font:600 19px "Space Grotesk";margin:25px 0 8px}.future-card p{color:var(--muted);font-size:12px;line-height:1.55}.future-icon{font-size:25px;color:var(--accent)}.future-top{display:flex;justify-content:space-between;align-items:center}.soon{display:inline-block;font:700 8px "Space Grotesk";letter-spacing:1.2px;color:var(--accent);border:1px solid rgba(216,255,69,.25);border-radius:99px;padding:5px 7px}.fake-drop{border:1px dashed #3a414d;border-radius:12px;display:flex;gap:10px;align-items:center;padding:14px;margin-top:20px;color:var(--muted)}.fake-drop span{color:var(--accent);font-size:18px}
.footer-brand{display:grid;grid-template-columns:auto auto;align-items:center;gap:2px 8px}.footer-brand span{font-size:9px;text-transform:uppercase;letter-spacing:1px}.footer-brand small{grid-column:1/-1}
.search-dialog{width:min(620px,calc(100% - 26px));padding:0;background:transparent;border:0;box-shadow:none}.search-dialog::backdrop{background:rgba(0,0,0,.72);backdrop-filter:blur(7px)}.search-box{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}.search-input-wrap{height:54px;background:var(--bg);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;gap:10px;padding:0 14px}.search-input-wrap>span{color:var(--accent);font-size:20px}.search-input-wrap input{flex:1;background:transparent;border:0;outline:0;color:var(--text);font:500 14px "DM Sans"}.search-label{font:700 9px "Space Grotesk";letter-spacing:1.5px;color:#666e79;padding:17px 10px 7px}.search-results{display:grid;gap:4px}.search-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:10px;cursor:pointer}.search-item:hover,.search-item:focus{background:var(--panel2);outline:none}.search-item .sicon{width:32px;height:32px;display:grid;place-items:center;background:var(--bg);border:1px solid var(--line);border-radius:8px}.search-item strong{display:block;font-size:13px}.search-item small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.search-item>span:last-child{margin-left:auto;color:var(--accent)}
@media(max-width:980px){.hero{grid-template-columns:1fr;gap:40px}.hero-panel{max-width:520px}.future-grid{grid-template-columns:1fr 1fr}.search-btn kbd{display:none}.trust-strip{grid-template-columns:1fr 1fr}.trust-strip div:nth-child(2){border-right:0}.trust-strip div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media(max-width:640px){.hero-panel{display:none}.trust-strip{margin-bottom:45px}.trust-strip div{padding:16px}.future-grid{grid-template-columns:1fr}.future-card{min-height:220px}.search-btn{width:38px;padding:0;justify-content:center}.search-btn span{font-size:19px}.top-actions{margin-left:auto}.brand-copy small{font-size:7px}.category-chips{overflow:auto;flex-wrap:nowrap;padding-bottom:3px}.chip{white-space:nowrap}}

/* Amy3D V4 — STL Analyzer */
.stl-drop{border:1px dashed #46505f;border-radius:16px;min-height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;cursor:pointer;background:rgba(255,255,255,.015);transition:.2s;margin-bottom:20px;text-align:center;padding:20px}.stl-drop:hover,.stl-drop.drag{border-color:var(--accent);background:rgba(216,255,69,.05)}.stl-drop-icon{font-size:30px;color:var(--accent)}.stl-drop span{font-size:12px;color:var(--muted)}.stl-options{margin-bottom:0}.stl-result .big-number{font-size:24px;letter-spacing:-1px;word-break:break-word}.tool-card[data-open="stl"]{background:radial-gradient(circle at 85% 15%,rgba(216,255,69,.13),transparent 32%),linear-gradient(145deg,var(--panel),#0f1218)}

.support-top{border:1px solid var(--line);background:var(--panel);padding:9px 13px;border-radius:11px;font-size:12px;font-weight:700;transition:.2s}
.support-top:hover{border-color:var(--accent);transform:translateY(-1px)}
.support-section{padding:35px 0 105px}
.support-card{position:relative;overflow:hidden;display:grid;grid-template-columns:1.25fr .75fr;gap:55px;padding:48px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,var(--panel),var(--panel2))}
.support-card:after{content:"AMY";position:absolute;right:-20px;bottom:-70px;font:700 190px "Space Grotesk";letter-spacing:-15px;color:var(--accent);opacity:.025;pointer-events:none}
.support-copy h2{font-size:44px;margin-bottom:22px}.support-copy p{color:var(--muted);line-height:1.7;max-width:650px}
.support-promise{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;font-size:12px;color:#aeb3bd}.support-promise span{color:var(--accent);font-weight:800;margin-right:-11px}
.support-actions{display:flex;flex-direction:column;gap:12px;justify-content:center}
.donate-card{display:grid;grid-template-columns:48px 1fr auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:16px;background:rgba(0,0,0,.12);transition:.2s transform,.2s border-color}
.donate-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.donate-icon{width:46px;height:46px;border-radius:13px;background:var(--accent);color:#0b0d12;display:grid;place-items:center;font:800 20px "Space Grotesk"}
.donate-card span:nth-child(2){display:flex;flex-direction:column}.donate-card small{font-size:9px;letter-spacing:1.2px;color:var(--muted);font-weight:700}.donate-card strong{font:700 18px "Space Grotesk";margin:2px 0}.donate-card em{font-size:11px;color:var(--muted);font-style:normal}.donate-card b{color:var(--accent)}
.support-thanks{text-align:center;color:var(--muted);font-size:11px;margin:5px 0 0}
@media(max-width:800px){.support-card{grid-template-columns:1fr;padding:30px;gap:30px}.support-copy h2{font-size:34px}.support-top{display:none}}


/* Amy3D V6 — stabilization, workshop profile, STL preview, mobile nav */
.icon-action,.menu-btn{height:38px;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:11px;padding:0 11px;cursor:pointer}
.install-btn{font-size:11px;font-weight:700;color:var(--accent)}.menu-btn{display:none;font-size:18px}
.mobile-nav{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-top:0;background:var(--panel);border-radius:0 0 14px 14px;overflow:hidden}
.mobile-nav a{text-align:center;padding:12px 6px;font-size:11px;color:var(--muted);border-right:1px solid var(--line)}.mobile-nav a:last-child{border:0}
.workflow{padding:10px 0 105px}.workflow>h2{font-size:43px;margin-bottom:28px}.workflow-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.workflow-grid button{text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:18px;color:var(--text);padding:24px;cursor:pointer;display:grid;gap:8px;transition:.2s}.workflow-grid button:hover{border-color:var(--accent);transform:translateY(-3px)}
.workflow-grid b{font:700 10px "Space Grotesk";color:var(--accent);letter-spacing:1px}.workflow-grid strong{font:600 19px "Space Grotesk"}.workflow-grid span{font-size:12px;line-height:1.55;color:var(--muted)}
.stl-layout{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}.preview-wrap{min-height:210px;position:relative;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:radial-gradient(circle at 50% 45%,rgba(216,255,69,.045),transparent 55%),#090b0f}
#stlCanvas{display:block;width:100%;height:100%;min-height:210px;touch-action:none}.preview-empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:var(--muted);font:600 12px "Space Grotesk";pointer-events:none}.preview-empty small{display:block;font:400 10px "DM Sans";margin-top:-78px}
.stl-progress{height:34px;border:1px solid var(--line);border-radius:9px;overflow:hidden;position:relative;display:flex;align-items:center;padding:0 11px;color:var(--muted);font-size:10px}.stl-progress i{position:absolute;inset:0 auto 0 0;width:35%;background:linear-gradient(90deg,transparent,rgba(216,255,69,.18),transparent);animation:scan 1.1s linear infinite}.stl-progress span{position:relative;z-index:1}@keyframes scan{from{transform:translateX(-100%)}to{transform:translateX(300%)}}
.analysis-health{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0 4px}.health{font-size:10px;border:1px solid var(--line);border-radius:99px;padding:6px 8px}.health.good{color:var(--accent);border-color:rgba(216,255,69,.25)}.health.warn{color:#ffca6b;border-color:rgba(255,202,107,.3)}.health.neutral{color:var(--muted)}
.stl-actions{margin-top:18px}.stl-actions button:disabled{opacity:.4;cursor:not-allowed}.settings-dialog{width:min(720px,calc(100% - 30px));border:1px solid var(--line);border-radius:22px;background:var(--panel);color:var(--text);padding:0;box-shadow:var(--shadow)}
.settings-note{margin-top:18px;padding:12px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:11px}
@media(max-width:900px){.support-top{display:none}.stl-layout{grid-template-columns:1fr}.workflow-grid{grid-template-columns:1fr}.workflow>h2{font-size:35px}}
@media(max-width:800px){.menu-btn{display:block}.nav{display:none}.topbar{gap:10px}.search-btn,.theme-btn,.icon-action,.menu-btn{flex:0 0 auto}.install-btn{display:none!important}.mobile-nav{grid-template-columns:1fr 1fr 1fr}.mobile-nav a:nth-child(4),.mobile-nav a:nth-child(5){grid-column:auto}.stl-options{grid-template-columns:1fr}.preview-wrap{min-height:240px}.workflow{padding-bottom:75px}}