:root{
  --accent:#fe603a;
  --glass:rgba(255,255,255,.62);
  --glass-strong:rgba(255,255,255,.96);
  --stroke:rgba(255,255,255,.9);
  --ink:#0b0c0f;
  --muted:#6b7280;
  --red:#ff3b30;
  --btn-gray:#f2f3f6;
  --focus:0 0 0 3px rgba(254,96,58,.28);
  --radius-xxl:28px;
  --gap-y:22px;
  --gap-x:18px;
}
*{box-sizing:border-box} html,body{height:100%}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}

.bg{position:fixed;inset:0;z-index:-1;pointer-events:none;background:#fff;overflow:hidden}
.bg::before,.bg::after{content:"";position:absolute;top:50%;width:56vw;height:112vh;border-radius:50%;filter:blur(68px) saturate(115%);opacity:.85;will-change:transform}
.bg::before{left:-22vw;background:radial-gradient(50% 60% at 60% 50%,#ffe7dc 0%,rgba(255,231,220,0) 72%);animation:sideFlowL 30s ease-in-out infinite alternate}
.bg::after{right:-22vw;background:radial-gradient(50% 60% at 40% 50%,#fff4cc 0%,rgba(255,244,204,0) 72%);animation:sideFlowR 30s ease-in-out infinite alternate;animation-delay:1.2s}
@keyframes sideFlowL{0%{transform:translate(-2vw,-50%) scale(1)}50%{transform:translate(1vw,-47.5%) scale(1.05)}100%{transform:translate(2vw,-51.5%) scale(1.07)}}
@keyframes sideFlowR{0%{transform:translate(-1vw,-50%) scale(1)}50%{transform:translate(1vw,-52%) scale(1.05)}100%{transform:translate(-2vw,-48.5%) scale(1.07)}}

.shell{min-height:100%;display:grid;place-items:center;padding:64px 20px}
.card{
  width:min(980px,100%);
  position:relative;
  border-radius:var(--radius-xxl);
  padding:34px 32px;
  background:
    radial-gradient(120% 160% at 20% 0%, rgba(255,255,255,.72) 0%, rgba(255,255,255,.52) 48%, rgba(255,255,255,.34) 100%),
    linear-gradient(180deg, rgba(255,255,255,.38) 0%, rgba(255,255,255,.2) 100%);
  border:1px solid rgba(255,255,255,.88);
  box-shadow:
    0 60px 120px rgba(0,0,0,.26),
    inset 0 2px 8px rgba(255,255,255,.66),
    inset 0 -2px 8px rgba(255,255,255,.32);
  backdrop-filter: saturate(210%) blur(46px) contrast(1.05);
  -webkit-backdrop-filter: saturate(210%) blur(46px) contrast(1.05);
}
.card::before{
  content:"";
  position:absolute; inset:2px;
  border-radius:calc(var(--radius-xxl) - 2px);
  background:
    radial-gradient(36% 30% at 22% 6%, rgba(255,255,255,.58) 0%, rgba(255,255,255,0) 80%),
    radial-gradient(60% 70% at 85% 110%, rgba(255,255,255,.24) 0%, rgba(255,255,255,0) 70%);
  pointer-events:none;
  mix-blend-mode:screen;
}
.card::after{
  content:"";
  position:absolute; inset:0;
  border-radius:inherit;
  opacity:.1;
  pointer-events:none;
  background-image:
    url("data:image/svg+xml;utf8,    <svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'>      <filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2' stitchTiles='stitch'/></filter>      <rect width='160' height='160' filter='url(%23n)' opacity='0.55'/>    </svg>");
  background-size:200px 200px;
  border:1px solid rgba(255,255,255,.22);
}

.head{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.title{font-weight:800;letter-spacing:-.01em;font-size:clamp(22px,3vw,30px)}
.badge{font-size:12px;color:#fff;background:#111827;padding:5px 9px;border-radius:999px;opacity:.85}
.subtitle{color:var(--muted);margin:2px 0 22px}

.formgrid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap-y) var(--gap-x)}
.col-12{grid-column:span 12} .col-6{grid-column:span 6}
@media (max-width:900px){ .col-6{grid-column:span 12} }

.field{display:block}
.labelrow{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:2px 2px 8px}
label{font-size:13px;color:#475569}
.req::after{content:"*";color:#ff3b30;margin-left:4px}

.info-wrap{display:inline-flex;position:relative}
.infobtn{
  display:inline-flex;align-items:center;justify-content:center;
  width:22px;height:22px;border-radius:999px;
  background:linear-gradient(180deg, rgba(254,96,58,.95) 0%, rgba(254,96,58,.82) 100%);
  color:#fff;font-weight:700;font-size:13px;border:1px solid rgba(255,255,255,.55);
  box-shadow:0 6px 16px rgba(254,96,58,.32), inset 0 1px 0 rgba(255,255,255,.45);
  cursor:pointer;line-height:1;
  transition:background .25s, box-shadow .25s, color .25s;
}
.infobtn:hover,
.infobtn:focus {
  background:rgba(255,255,255,.3);
  color:var(--accent);
  box-shadow:inset 0 1px 2px rgba(255,255,255,.4),
             0 4px 10px rgba(0,0,0,.08);
  transform:none;
}

.tooltip{
  position:absolute;top:50%;left:calc(100% + 10px);transform:translateY(-50%);
  min-width:200px;max-width:320px;background:var(--glass-strong);border:1px solid rgba(0,0,0,.08);
  border-radius:12px;padding:10px 12px;color:#111827;font-size:12.5px;box-shadow:0 12px 36px rgba(0,0,0,.14);
  display:none;z-index:5;backdrop-filter: blur(8px) saturate(140%);
}
.tooltip::after{content:"";position:absolute;top:50%;left:-7px;transform:translateY(-50%) rotate(45deg);width:14px;height:14px;background:var(--glass-strong);border-top:1px solid rgba(0,0,0,.08);border-left:1px solid rgba(0,0,0,.08)}
.info-wrap:hover .tooltip,.info-wrap:focus-within .tooltip{display:block}

.input,.select,.output{width:100%;appearance:none;border:1px solid rgba(0,0,0,.08);background:rgba(255,255,255,.97);border-radius:16px;padding:14px 16px;font-size:15px;line-height:1.25;outline:none;transition:box-shadow .15s,border-color .15s}
.input:focus,.select:focus,.output:focus{box-shadow:var(--focus);border-color:rgba(254,96,58,.55)}
.input.error{border-color:#ff3b30}
.err{font-size:12px;color:#ff3b30;margin-top:8px;display:none}
.err.shown{display:block}

.toolbar{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  margin:-8px 0 8px -6px;
  justify-content:flex-start;
}

.switch,.seg{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#4b5563;
  padding:6px 10px;background:linear-gradient(180deg, rgba(255,255,255,.75) 0%, rgba(255,255,255,.6) 100%);
  border:1px solid rgba(255,255,255,.7);border-radius:12px;box-shadow:inset 0 1px 0 rgba(255,255,255,.45)
}
.switch input{
  -webkit-appearance:none;appearance:none;width:16px;height:16px;margin:0;
  border:2px solid #e5e7eb;border-radius:4px;background:#fff;
  display:grid; place-items:center;
  transition:border-color .15s,background-color .15s,box-shadow .15s;
}
.switch input:hover{box-shadow:0 0 0 3px rgba(254,96,58,.10)}
.switch input:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(254,96,58,.18)}
.switch input:checked{background-color:#fe603a;border-color:#fe603a}
.switch input:checked::after{content:""; display:block; width:5px; height:8px; border-right:2px solid #fff; border-bottom:2px solid #fff; transform:translateY(-0.5px) rotate(45deg)}

.switch[data-id="lower"] .info-wrap{margin-right:40px}
.switch[data-id="trim"] .info-wrap{margin-right:40px}
.seg[data-id="space"] .info-wrap{margin-right:40px}
.seg .select{padding:8px 12px;border-radius:10px;border:1px solid rgba(0,0,0,.08)}

.adv{margin-top:-22px}
.adv > summary{list-style:none;cursor:pointer;font-size:13px;color:#4b5563;display:inline-flex;align-items:center;gap:8px;padding:6px 0}
.advtoggle{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:999px;background:linear-gradient(180deg, rgba(254,96,58,.95) 0%, rgba(254,96,58,.82) 100%);color:#fff;font-weight:800;font-size:14px;border:1px solid rgba(255,255,255,.55);box-shadow:0 6px 16px rgba(254,96,58,.32), inset 0 1px 0 rgba(255,255,255,.45);position:relative;top:-1px;transition:transform .15s, box-shadow .2s}
.advtoggle::after{content:"+";line-height:1}
.adv:hover .advtoggle{transform:translateY(-1px);box-shadow:0 8px 20px rgba(254,96,58,.38), inset 0 1px 0 rgba(255,255,255,.55)}
.adv[open] .advtoggle::after{content:"–"}
.adv-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap-y) var(--gap-x);padding-top:6px}
.adv-grid .field{grid-column:span 6}
@media (max-width:900px){.adv-grid .field{grid-column:span 12}}

.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{appearance:none;border:0;cursor:pointer;user-select:none;border-radius:14px;padding:13px 16px;font-weight:600;background:var(--btn-gray);color:#111827;transition:transform .12s,background .2s,box-shadow .2s}
.btn.primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(254,96,58,.28)}
.btn:hover{transform:translateY(-2px)} .btn:active{transform:translateY(1px)}

.outputwrap{display:flex;gap:10px;align-items:center;background:rgba(255,255,255,.8);border:1px solid rgba(0,0,0,.06);border-radius:16px;padding:10px}
.copy{min-width:120px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:rgba(17,24,39,.9);color:#fff;padding:10px 14px;border-radius:10px;opacity:0;transition:opacity .2s}
.toast.show{opacity:1}