:root{
  --bg:#0f1320;
  --bg-soft:#151a2b;
  --surface:#ffffff;
  --panel:#f7f8fb;
  --ink:#1b2030;
  --ink-soft:#4a5169;
  --muted:#8089a3;
  --line:#e6e9f0;
  --line-soft:#eef0f6;
  --brand:#5b6cff;
  --brand-dark:#4655e0;
  --accent:#19c39a;
  --code-bg:#0f1424;
  --code-ink:#c6d0f5;
  --radius:14px;
  --shadow:0 1px 2px rgba(15,19,32,.04), 0 10px 30px rgba(15,19,32,.07);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--panel);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{width:min(1000px,92vw);margin-inline:auto}
h1,h2,h3{line-height:1.2;letter-spacing:-.015em}
a{color:var(--brand)}
.muted{color:var(--muted)}
code{font-family:var(--mono);font-size:.88em;background:#eef0f6;padding:.12em .4em;border-radius:5px;color:#3a4a8a}

/* Header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,251,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:.5em;font-weight:800;font-size:1.12rem;text-decoration:none;color:var(--ink);letter-spacing:-.02em}
.brand .dot{display:inline-block;width:22px;height:22px;border-radius:6px;background:url("/favicon-32x32.png?v=symbol") center/contain no-repeat;box-shadow:0 1px 3px rgba(15,19,32,.12)}
.nav{display:flex;gap:1.3rem}
.nav a{text-decoration:none;color:var(--ink-soft);font-weight:500;font-size:.92rem}
.nav a:hover{color:var(--brand)}
@media(max-width:640px){.nav{display:none}}

/* Hero */
.hero{padding:60px 0 8px;text-align:center;background:
  radial-gradient(1100px 360px at 50% -20%, #e8ebff 0%, rgba(232,235,255,0) 70%)}
.eyebrow{display:inline-block;color:var(--brand-dark);font-weight:600;font-size:.8rem;letter-spacing:.03em;background:#eceeff;border:1px solid #dfe3ff;padding:.3em .9em;border-radius:999px;margin:0 0 16px}
.hero h1{font-size:clamp(2rem,5vw,3rem);margin:0 0 16px}
.lede{font-size:1.1rem;color:var(--ink-soft);max-width:660px;margin:0 auto 6px}
.trust{color:var(--muted);font-size:.9rem;margin:14px auto 0}
.trust strong{color:var(--accent)}

/* Tool */
.tool-section{padding:32px 0 56px}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:22px}
.dropzone{border:2px dashed #ccd2e6;border-radius:var(--radius);background:var(--panel);padding:42px 20px;text-align:center;cursor:pointer;transition:border-color .15s ease, background .15s ease}
.dropzone:hover{border-color:var(--brand);background:#fbfbff}
.dropzone.is-drag{border-color:var(--brand);background:#eef0ff}
.dropzone .dz-icon{font-size:2rem;line-height:1}
.dropzone h2{font-size:1.15rem;margin:.5em 0 .3em;text-align:center}
.dropzone p{margin:0 0 14px;color:var(--muted);font-size:.92rem}
.btn{display:inline-block;padding:.72em 1.3em;border-radius:10px;font-weight:600;font-size:.95rem;text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .07s ease, background .15s ease, border-color .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(91,108,255,.3)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

.error{margin:14px 0 0;padding:10px 14px;border-radius:10px;background:#fff3f3;border:1px solid #ffd9d9;color:#b4233a;font-size:.9rem}

/* Results */
.results{margin-top:22px;border-top:1px solid var(--line-soft);padding-top:22px}
.result-head{display:flex;gap:18px;align-items:flex-start;flex-wrap:wrap;margin-bottom:18px}
.preview-box{flex:0 0 auto;width:120px;height:120px;border:1px solid var(--line);border-radius:12px;background:
  conic-gradient(#eef0f6 90deg,#fff 0 180deg,#eef0f6 0 270deg,#fff 0) 0 0/18px 18px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.preview-box img{max-width:100%;max-height:100%;display:block}
.meta{flex:1;min-width:200px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;align-self:center}
.meta div{font-size:.9rem}
.meta dt{color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:2px}
.meta dd{margin:0;font-weight:600;word-break:break-all}

.field{margin-bottom:16px}
.field-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.field-head label{font-weight:600;font-size:.86rem;color:var(--ink-soft)}
.out{width:100%;font-family:var(--mono);font-size:.82rem;line-height:1.5;color:var(--code-ink);background:var(--code-bg);border:1px solid #232a44;border-radius:10px;padding:12px 14px;resize:vertical;min-height:84px}
.out.short{min-height:48px;white-space:pre;overflow:auto}
.copy{border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:600;font-size:.8rem;padding:.42em 1em;border-radius:8px;cursor:pointer;white-space:nowrap;transition:all .12s ease;font-family:inherit}
.copy:hover{border-color:var(--brand);color:var(--brand-dark)}
.copy.ok{background:var(--accent);color:#fff;border-color:var(--accent)}
.toggle{display:flex;align-items:center;gap:8px;font-size:.86rem;color:var(--ink-soft);margin:2px 0 16px;cursor:pointer;user-select:none}
.toggle input{width:16px;height:16px;accent-color:var(--brand)}

/* Generic sections */
section{padding:48px 0}
.content-section h2,.faq-section h2,.siblings h2{font-size:clamp(1.4rem,3vw,1.9rem);margin:0 0 10px}
.content-section{background:#fff;border-top:1px solid var(--line)}
.prose{max-width:760px}
.prose h2{margin-top:8px}
.prose h3{font-size:1.12rem;margin:28px 0 6px}
.prose p,.prose li{color:var(--ink-soft);font-size:1rem}
.prose ul{padding-left:1.2em}
.prose pre{background:var(--code-bg);color:var(--code-ink);font-family:var(--mono);font-size:.84rem;padding:14px 16px;border-radius:10px;overflow:auto;border:1px solid #232a44}
.prose pre code{background:none;color:inherit;padding:0}

/* Sibling links */
.siblings{background:var(--panel)}
.sib-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:18px}
.sib-card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;text-decoration:none;color:var(--ink);transition:transform .12s ease, box-shadow .15s ease, border-color .12s ease}
.sib-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--brand)}
.sib-card strong{display:block;font-size:1rem;margin-bottom:4px}
.sib-card span{color:var(--muted);font-size:.88rem}
.sib-card.soon{opacity:.6;pointer-events:none}

/* FAQ */
.faq-section .wrap{max-width:760px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:2px 18px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600;padding:15px 0;list-style:none;color:var(--ink)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--brand);font-weight:700;font-size:1.1em}
details[open] summary::after{content:"–"}
details>p{margin:0 0 16px;color:var(--ink-soft)}

/* Footer */
.site-footer{background:var(--bg);color:#aeb6d6;padding:40px 0 26px}
.site-footer a{color:#cdd4f0;text-decoration:none}
.site-footer a:hover{color:#fff}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:18px}
.footer-nav{display:flex;flex-direction:column;gap:7px}
.footer-nav .head{font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;color:#6b76a3;margin-bottom:3px}
.footer-brand .brand{color:#fff}
.footer-brand p{max-width:280px;color:#7d87ab;font-size:.9rem;margin:.6em 0 0}
.copyright{border-top:1px solid #232a44;padding-top:18px;font-size:.82rem;color:#6b76a3;text-align:center}