:root{
  --bg:#f7f8fc; --surface:#fff; --ink:#152033; --muted:#63708a; --line:#e6e9f2;
  --brand:#5b4cf0; --brand2:#7d5cff; --soft:#f0eeff; --success:#12875d; --danger:#c23b4f;
  --shadow:0 10px 30px rgba(24,30,58,.08); --radius:18px; --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.wrap{width:min(var(--wrap),calc(100% - 32px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 8px 18px rgba(91,76,240,.25)}
.main-nav{display:flex;align-items:center;gap:22px;font-weight:650;font-size:14px}
.main-nav a:hover{color:var(--brand)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;padding:8px 12px;border-radius:10px}
.hero{padding:82px 0 52px;background:radial-gradient(circle at 80% 10%,#ebe8ff 0,transparent 36%),linear-gradient(180deg,#fff,#f7f8fc)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;border:1px solid #ddd8ff;background:#f6f4ff;color:#4d3bd0;padding:7px 12px;border-radius:999px;font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.05em}
h1,h2,h3{line-height:1.16;letter-spacing:-.025em}
h1{font-size:clamp(42px,6vw,72px);margin:18px 0 18px}
h2{font-size:clamp(28px,4vw,42px);margin:0 0 12px}
h3{font-size:20px;margin:0 0 8px}
.lead{font-size:19px;color:var(--muted);max-width:740px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border-radius:12px;font-weight:800;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(91,76,240,.22)}
.btn-secondary{background:#fff;border-color:var(--line)}
.hero-panel{background:#11182a;color:#eaf0ff;border-radius:24px;padding:24px;box-shadow:0 22px 60px rgba(17,24,42,.18)}
.code-lines{display:grid;gap:10px;margin-top:18px}
.code-line{height:12px;border-radius:999px;background:#26334e}
.code-line:nth-child(2){width:78%;background:#5347c9}.code-line:nth-child(3){width:90%}.code-line:nth-child(4){width:62%;background:#2b8868}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}
.stat{padding:14px;border:1px solid #2d3a56;border-radius:14px;text-align:center}.stat b{display:block;font-size:18px}.stat span{font-size:11px;color:#aeb8cf}
.section{padding:64px 0}
.section.white{background:#fff}
.section-head{max-width:760px;margin-bottom:28px}
.section-head p{color:var(--muted);margin:0}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 4px 18px rgba(25,35,64,.04)}
.card:hover{box-shadow:var(--shadow);transform:translateY(-1px)}
.card p{color:var(--muted);margin:0 0 14px}
.tag-list{display:flex;gap:7px;flex-wrap:wrap}.tag{font-size:11px;padding:5px 8px;border-radius:999px;background:var(--soft);color:#4a3ec2;font-weight:750}
.icon{width:44px;height:44px;border-radius:13px;background:var(--soft);display:grid;place-items:center;color:var(--brand);font-weight:900;margin-bottom:16px}
.notice{padding:16px 18px;border-radius:14px;background:#eef8f4;border:1px solid #cdebdc;color:#285e4a}
.tool-shell{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.tool-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}
.tool-panel h2,.tool-panel h3{margin-top:0}
label{display:block;font-size:13px;font-weight:800;margin-bottom:7px}
textarea,.text-input,select,input[type="number"],input[type="text"],input[type="email"]{width:100%;border:1px solid #dfe3ec;border-radius:12px;background:#fbfcff;color:var(--ink);padding:12px 13px;outline:none}
textarea{min-height:300px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;line-height:1.5}
textarea:focus,.text-input:focus,select:focus,input:focus{border-color:#9b8fff;box-shadow:0 0 0 3px #eeeaff}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.tool-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 11px;font-weight:750}
.tool-btn:hover{border-color:#b8afff;color:#4b3bc7;background:#faf9ff}
.tool-btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.result-meta{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:12px;margin:8px 0}
.metric-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:12px 0}
.metric{border:1px solid var(--line);border-radius:12px;padding:10px;text-align:center;background:#fff}.metric b{display:block;font-size:20px}.metric span{font-size:11px;color:var(--muted)}
.status{font-size:13px;margin-top:10px}.status.ok{color:var(--success)}.status.err{color:var(--danger)}
.content{max-width:820px;margin:auto}
.content p,.content li{color:#344057}
.content h2{margin-top:40px}.content h3{margin-top:28px}
.content code{background:#f0f1f6;padding:2px 5px;border-radius:5px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0}
.faq summary{font-weight:800;cursor:pointer}.faq p{margin-bottom:0}
.guide-card time{font-size:12px;color:var(--muted)}
.guide-card h3{margin-top:10px}
.breadcrumbs{font-size:13px;color:var(--muted);padding-top:24px}
.site-footer{background:#11182a;color:#dfe7fa;padding:52px 0 22px;margin-top:50px}
.footer-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr;gap:28px}
.footer-grid p{color:#aeb8cf;max-width:360px}.footer-grid h3{font-size:14px;color:#fff}
.footer-grid a{display:block;color:#bcc6da;margin:7px 0;font-size:13px}.footer-grid a:hover{color:#fff}
.footer-brand{color:#fff!important}.footer-bottom{border-top:1px solid #27334c;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#97a4bd;font-size:12px}
.file-drop{border:2px dashed #ccd2e2;border-radius:16px;padding:28px;text-align:center;background:#fbfcff}
.file-drop.drag{border-color:var(--brand);background:#f6f4ff}
.small{font-size:12px;color:var(--muted)}
.kbd{padding:2px 7px;border:1px solid #d9deea;border-bottom-width:2px;border-radius:6px;background:#fff;font-size:11px}
.ad-slot-note{border:1px dashed #d9deea;border-radius:12px;padding:12px;text-align:center;color:#929caf;font-size:11px;margin:18px 0}
.table-wrap{overflow:auto}.data-table{border-collapse:collapse;width:100%;font-size:13px}.data-table th,.data-table td{border:1px solid var(--line);padding:9px;text-align:left}.data-table th{background:#f4f5fa}
@media(max-width:960px){.hero-grid,.tool-shell{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.nav-toggle{display:block}.main-nav{display:none;position:absolute;left:16px;right:16px;top:65px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.hero{padding-top:54px}.grid-4,.grid-3,.metric-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}h1{font-size:42px}}


/* Subpage layout: follows the source site's tool-page pattern */
.tool-hero{padding:56px 0 24px;text-align:center}
.tool-hero .eyebrow{margin:auto}
.tool-hero h1{font-size:clamp(36px,5vw,58px);max-width:900px;margin:16px auto 14px}
.tool-hero .lead{margin:0 auto;max-width:850px}
.tool-wrap{width:min(1060px,calc(100% - 32px));margin:auto}
.tool-heading{text-align:center;margin:10px 0 18px}
.tool-tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:14px 0 18px}
.tool-tab{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 15px;font-weight:800;color:#4c5870}
.tool-tab.active,.tool-tab:hover{background:var(--soft);border-color:#cfc7ff;color:#4a3ec2}
.old-tool-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.old-tool-card textarea{min-height:280px}
.input-output-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.io-box{min-width:0}
.format-row{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end;margin:12px 0}
.format-arrow{display:grid;place-items:center;width:40px;height:42px;border-radius:10px;background:var(--soft);color:var(--brand);font-weight:900}
.center-toolbar{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:14px}
.panel-hidden{display:none}
.uuid-box{padding:28px;border:1px solid var(--line);border-radius:14px;text-align:center;background:#fbfcff;min-height:160px;display:grid;place-items:center}
.uuid-box code{font-size:16px;word-break:break-all}
.file-meta-bar{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;margin:12px 0}
.section-copy{max-width:880px;margin:auto}
@media(max-width:820px){
  .input-output-grid{grid-template-columns:1fr}
  .format-row{grid-template-columns:1fr}
  .format-arrow{transform:rotate(90deg);margin:auto}
}