/* ColumnCaster — D9 Gradient Mesh variant (duotone: blue #3b82f6 + green #22c55e) */
:root{
  --blue:#3b82f6; --green:#22c55e; --ink:#0f172a; --muted:#475569;
  --line:rgba(15,23,42,.10); --glass:rgba(255,255,255,.68);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0; color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif; font-size:16.5px; line-height:1.65;
  background:
    radial-gradient(640px 440px at 12% 6%, rgba(59,130,246,.20), transparent 65%),
    radial-gradient(720px 520px at 88% 14%, rgba(34,197,94,.18), transparent 65%),
    radial-gradient(560px 420px at 50% 100%, rgba(59,130,246,.12), transparent 65%),
    #ffffff;
  background-attachment:fixed;
}
h1,h2,h3{font-family:"Sora","Inter",system-ui,sans-serif; line-height:1.22; letter-spacing:-.02em; font-weight:700}
a{color:#1d4ed8}
.wrap{max-width:1060px; margin:0 auto; padding:0 22px}
/* header */
.site-header{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.78); backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px); border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex; align-items:center; justify-content:space-between; gap:16px; padding-top:12px; padding-bottom:12px; flex-wrap:wrap}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--ink)}
.brand svg{width:36px; height:36px}
.brand-name{font-family:"Sora",sans-serif; font-size:1.35rem; font-weight:700}
.brand-name .grad{background:linear-gradient(90deg,var(--blue),var(--green)); -webkit-background-clip:text; background-clip:text; color:transparent}
.nav{display:flex; gap:4px 14px; flex-wrap:wrap; align-items:center}
.nav a{color:var(--muted); text-decoration:none; font-size:.93rem; padding:6px 4px; border-radius:6px}
.nav a:hover{color:var(--ink)}
.nav a.cta{background:linear-gradient(90deg,var(--blue),var(--green)); color:#fff; padding:9px 18px; border-radius:999px; font-weight:600; box-shadow:0 6px 18px rgba(59,130,246,.30)}
.nav a.cta:hover{filter:brightness(1.06); color:#fff}
/* hero */
.hero{text-align:center; padding:70px 0 6px}
.eyebrow{display:inline-block; font-size:.78rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:#1d4ed8; background:rgba(59,130,246,.10); border:1px solid rgba(59,130,246,.25); padding:7px 16px; border-radius:999px; margin-bottom:16px}
.hero h1{font-size:clamp(2rem,4.8vw,3.3rem); margin:0 0 16px}
.hero h1 .grad{background:linear-gradient(90deg,var(--blue),var(--green)); -webkit-background-clip:text; background-clip:text; color:transparent}
.lede{max-width:720px; margin:0 auto; font-size:1.12rem; color:var(--muted)}
/* blob divider */
.blob{line-height:0; margin:36px 0 0}
.blob svg{display:block; width:100%; height:64px}
/* glass tool card */
.glass{background:var(--glass); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.9); border-radius:24px; padding:34px;
  box-shadow:0 24px 60px rgba(15,23,42,.12), inset 0 1px 0 rgba(255,255,255,.8); margin:0 0 10px; position:relative; overflow:hidden}
.glass::before{content:""; position:absolute; top:-70px; right:-70px; width:230px; height:230px;
  background:radial-gradient(circle, rgba(34,197,94,.25), transparent 70%); pointer-events:none}
.glass::after{content:""; position:absolute; bottom:-80px; left:-60px; width:260px; height:260px;
  background:radial-gradient(circle, rgba(59,130,246,.22), transparent 70%); pointer-events:none}
.tool-head{display:flex; align-items:flex-start; justify-content:space-between; gap:14px; flex-wrap:wrap; margin-bottom:22px; position:relative; z-index:1}
.tool-head h2{margin:0; font-size:1.55rem}
.chip{display:inline-flex; align-items:center; gap:7px; font-size:.78rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase;
  color:#166534; background:rgba(34,197,94,.12); border:1px solid rgba(34,197,94,.35); padding:8px 15px; border-radius:999px; white-space:nowrap}
.chip svg{width:14px; height:14px}
.opts{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:18px 22px; margin-bottom:20px; position:relative; z-index:1}
.opt-label{display:block; font-weight:600; font-size:.9rem; margin-bottom:8px}
.opt-hint{font-size:.82rem; color:var(--muted); margin:8px 0 0}
select,input[type=text],input[type=number]{width:100%; padding:11px 13px; border:1px solid var(--line); border-radius:12px; background:rgba(255,255,255,.9); color:var(--ink); font-size:.95rem; font-family:inherit}
select:focus,input:focus{outline:2px solid var(--blue); outline-offset:1px}
.num-row{display:flex; align-items:center; gap:10px}
.num-row input[type=range]{flex:1; accent-color:var(--blue)}
.num-row input[type=number]{width:74px}
.range-val{font-family:"Sora",sans-serif; font-weight:700; min-width:2ch; text-align:right}
.seg{display:flex; gap:6px; flex-wrap:wrap}
.seg button{border:1px solid var(--line); background:rgba(255,255,255,.9); color:var(--ink); padding:8px 13px; border-radius:999px; font-size:.84rem; cursor:pointer; font-family:"JetBrains Mono",monospace}
.seg button[aria-pressed=true]{background:var(--ink); color:#fff; border-color:var(--ink); font-weight:600}
.btn-row{display:flex; gap:12px; flex-wrap:wrap; margin:6px 0 22px; position:relative; z-index:1}
.btn{border:none; cursor:pointer; font-family:inherit; font-weight:700; font-size:1rem; padding:13px 28px; border-radius:999px; display:inline-flex; align-items:center; gap:8px}
.btn-primary{background:linear-gradient(90deg,var(--blue),var(--green)); color:#fff; box-shadow:0 8px 22px rgba(59,130,246,.35)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{background:rgba(255,255,255,.7); color:var(--ink); border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn:disabled{opacity:.45; cursor:not-allowed}
.btn svg{width:17px; height:17px}
/* output */
.output{border:1px solid var(--line); border-radius:16px; background:rgba(255,255,255,.85); overflow:hidden; position:relative; z-index:1}
.output-head{display:flex; justify-content:space-between; align-items:center; gap:10px; padding:12px 18px; border-bottom:1px solid var(--line); font-size:.84rem; color:var(--muted); flex-wrap:wrap}
#colList{list-style:none; margin:0; padding:8px}
#colList li{display:flex; align-items:center; gap:12px; padding:10px 14px; border-radius:10px; cursor:pointer; font-family:"JetBrains Mono",monospace; font-size:.97rem}
#colList li:hover{background:rgba(59,130,246,.07)}
#colList li .dot{width:9px; height:9px; border-radius:50%; background:linear-gradient(135deg,var(--blue),var(--green)); flex:none}
#colList li .txt{flex:1; word-break:break-all}
#colList li .tag{font-size:.72rem; color:var(--muted); background:rgba(15,23,42,.05); border-radius:6px; padding:3px 9px; white-space:nowrap; font-family:"Inter",sans-serif}
#colList li .mini-copy{font-family:"Inter",sans-serif; font-size:.74rem; letter-spacing:.06em; text-transform:uppercase; color:var(--muted); border:1px solid var(--line); border-radius:8px; padding:4px 10px; white-space:nowrap}
#colList li:hover .mini-copy{color:#1d4ed8; border-color:var(--blue)}
.placeholder{padding:44px 20px; text-align:center; color:var(--muted)}
.placeholder svg{width:46px; height:46px; margin-bottom:10px; opacity:.65}
/* honest limits */
.limits{margin-top:20px; border-radius:16px; padding:18px 22px; font-size:.9rem; position:relative; z-index:1;
  background:linear-gradient(135deg, rgba(59,130,246,.08), rgba(34,197,94,.08)); border:1px solid rgba(59,130,246,.25)}
.limits strong{display:block; font-family:"Sora",sans-serif; font-size:1rem; margin-bottom:6px}
.limits ul{margin:8px 0 0; padding-left:20px}
.limits li{margin:4px 0}
/* content */
.section{padding:44px 0}
.section h2{font-size:1.85rem; margin:36px 0 12px}
.section h2:first-child{margin-top:0}
.section h3{font-size:1.25rem; margin:26px 0 8px}
.section p{margin:0 0 14px}
.section ul,.section ol{margin:0 0 16px; padding-left:24px}
.section li{margin:6px 0}
code.inline{font-family:"JetBrains Mono",monospace; background:rgba(59,130,246,.10); border:1px solid rgba(59,130,246,.20); padding:2px 8px; border-radius:6px; font-size:.86em; color:#1e40af}
table{width:100%; border-collapse:collapse; margin:18px 0; font-size:.94rem; background:rgba(255,255,255,.85); border-radius:12px; overflow:hidden}
th,td{border:1px solid var(--line); padding:10px 13px; text-align:left; vertical-align:top}
th{background:linear-gradient(90deg, rgba(59,130,246,.14), rgba(34,197,94,.14)); font-family:"Sora",sans-serif; font-size:.86rem}
td code{font-family:"JetBrains Mono",monospace; font-size:.85rem; color:#1e40af; white-space:nowrap}
.tint{background:linear-gradient(135deg, rgba(59,130,246,.07), rgba(34,197,94,.07)); border:1px solid rgba(59,130,246,.22); border-radius:16px; padding:16px 20px; margin:18px 0; font-size:.95rem}
/* faq */
.faq-item{background:var(--glass); backdrop-filter:blur(10px); border:1px solid var(--line); border-radius:16px; margin:0 0 12px; padding:20px 24px}
.faq-item h3{margin:0 0 8px; font-size:1.12rem}
.faq-item p{margin:0; color:var(--muted)}
.faq-item p strong{color:var(--ink)}
/* footer */
.site-footer{margin-top:48px; padding:30px 0 44px; font-size:.9rem; color:var(--muted); border-top:1px solid var(--line); background:rgba(255,255,255,.6); backdrop-filter:blur(10px)}
.site-footer .wrap{display:flex; justify-content:space-between; gap:18px; flex-wrap:wrap; align-items:center}
.site-footer nav{display:flex; gap:18px; flex-wrap:wrap}
.site-footer a{color:var(--muted); text-decoration:none}
.site-footer a:hover{color:#1d4ed8}
.toast{position:fixed; bottom:26px; left:50%; transform:translateX(-50%) translateY(20px); background:var(--ink); color:#fff; padding:12px 24px; border-radius:999px; font-size:.92rem; opacity:0; pointer-events:none; transition:all .25s ease; z-index:99}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0)}
@media(max-width:640px){.glass{padding:24px 18px}}
@media(prefers-reduced-motion:reduce){*{animation:none !important; transition:none !important}}