:root{--ink:#17212b;--muted:#627080;--line:#dbe3eb;--paper:#fff;--wash:#f5f8fb;--accent:#176b87;--accentdark:#105268;--good:#0c7854}*{box-sizing:border-box}body{margin:0;background:linear-gradient(135deg,#f1f7f8,#f9f5ef);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.5}.shell{max-width:1020px;margin:auto;padding:52px 24px 36px}.hero{max-width:740px;margin-bottom:28px}.eyebrow{color:var(--accent);font-weight:800;font-size:.75rem;letter-spacing:.11em;margin:0 0 10px}.hero h1{font-size:clamp(2rem,5vw,3.7rem);line-height:1.06;letter-spacing:-.055em;margin:0}.lede{font-size:1.06rem;color:var(--muted);max-width:680px;margin:15px 0 0}.tool{background:var(--paper);border:1px solid var(--line);box-shadow:0 18px 45px #17304715;border-radius:18px;padding:20px}.toolbar,.output-head,.actions{display:flex;align-items:center;justify-content:space-between;gap:14px}.toolbar strong,.output-head strong{display:block}.toolbar span,.output-head span{font-size:.84rem;color:var(--muted);display:block}.file-button,button{border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;font-weight:700;cursor:pointer;padding:10px 13px}.file-button{color:var(--accent);font-size:.9rem}.file-button input{display:none}.editor{margin-top:14px;min-height:180px;border:1px solid var(--line);border-radius:11px;padding:15px;outline:none;overflow-wrap:anywhere;background:#fff;white-space:pre-wrap}.editor:focus{border-color:var(--accent);box-shadow:0 0 0 3px #176b8720}.editor:empty:before{content:attr(data-placeholder);color:#8b98a6;pointer-events:none}.output{background:var(--wash);min-height:180px}.actions{padding:14px 0}.actions p{color:var(--muted);font-size:.9rem;margin:0;text-align:right}.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.primary:hover{background:var(--accentdark)}.quiet{margin-right:auto}.details{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.details>div,.faq{background:#ffffffb8;border:1px solid var(--line);border-radius:14px;padding:18px}.details h2,.faq h2{font-size:1rem;margin:0 0 7px}.details p,.faq p{color:var(--muted);font-size:.94rem;margin:0}.faq details{padding:13px 0;border-top:1px solid var(--line)}.faq details:first-of-type{border-top:0}.faq summary{cursor:pointer;font-weight:700}.faq details p{padding-top:8px}footer{text-align:center;color:var(--muted);font-size:.86rem;margin:30px 0 0}@media(max-width:640px){.shell{padding:28px 14px}.tool{padding:14px;border-radius:14px}.toolbar,.output-head,.actions{align-items:stretch;flex-direction:column}.file-button,button{width:100%;text-align:center}.output-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%}.output-actions button{width:auto}.quiet{margin-right:0}.actions p{text-align:left}.details{grid-template-columns:1fr;gap:10px}.editor{min-height:160px}}