:root{--bg: #f7f8fb;--surface: #ffffff;--surface-2: #eef1f7;--border: #e2e6ef;--text: #1a1f2e;--text-muted: #5b6577;--brand: #3b5bfd;--brand-hover: #2c46d8;--brand-soft: #eaefff;--success: #12885a;--success-soft: #e5f6ee;--danger: #c0392b;--danger-soft: #fdecea;--radius: 14px;--radius-sm: 9px;--shadow: 0 1px 3px rgba(20, 30, 60, .06), 0 8px 24px rgba(20, 30, 60, .05);--maxw: 1080px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}@media(prefers-color-scheme:dark){:root{--bg: #0e1220;--surface: #171c2e;--surface-2: #1f2740;--border: #2a3352;--text: #eef1f8;--text-muted: #a4afc6;--brand: #6d86ff;--brand-hover: #8299ff;--brand-soft: #1c2547;--success: #3ecb8f;--success-soft: #14322a;--danger: #ff7b6b;--danger-soft: #3a1f1c;--shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}h1,h2,h3{line-height:1.25;color:var(--text)}h1{font-size:clamp(1.7rem,4vw,2.4rem);margin:0 0 .5rem}h2{font-size:clamp(1.3rem,3vw,1.6rem);margin:2rem 0 .75rem}h3{font-size:1.1rem;margin:1.25rem 0 .4rem}p{margin:0 0 1rem}.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:62px;gap:16px}.logo{font-weight:800;font-size:1.2rem;color:var(--text);letter-spacing:-.02em;display:inline-flex;align-items:center;gap:8px}.logo:hover{text-decoration:none}.logo .mark{color:var(--brand)}.nav{display:flex;gap:4px;flex-wrap:wrap}.nav a{color:var(--text-muted);font-size:.92rem;font-weight:600;padding:8px 12px;border-radius:var(--radius-sm)}.nav a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}.site-footer{margin-top:4rem;border-top:1px solid var(--border);background:var(--surface);color:var(--text-muted);font-size:.9rem}.site-footer .container{padding-top:2rem;padding-bottom:2rem}.footer-grid{display:flex;flex-wrap:wrap;gap:2rem 3rem;margin-bottom:1.5rem}.footer-col h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);margin:0 0 .6rem}.footer-col a{display:block;color:var(--text-muted);padding:3px 0}.footer-col a:hover{color:var(--text)}.footer-bottom{border-top:1px solid var(--border);padding-top:1rem;display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:700;border:1px solid transparent;border-radius:var(--radius-sm);padding:12px 22px;cursor:pointer;transition:background .15s,transform .05s,opacity .15s}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover:not(:disabled){background:var(--brand-hover);text-decoration:none}.btn-ghost{background:transparent;color:var(--text-muted);border-color:var(--border)}.btn-ghost:hover:not(:disabled){background:var(--surface-2);text-decoration:none}.btn-download{background:var(--brand-soft);color:var(--brand)}.btn-download:hover:not(:disabled){background:var(--brand);color:#fff;text-decoration:none}.converter{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(18px,4vw,30px)}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--bg);padding:clamp(28px,6vw,48px) 20px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone:focus-visible{border-color:var(--brand);background:var(--brand-soft);outline:none}.dropzone.dragging{border-color:var(--brand);background:var(--brand-soft)}.dropzone .dz-icon{font-size:2.4rem;line-height:1}.dropzone .dz-title{font-weight:700;font-size:1.1rem;margin:.6rem 0 .2rem}.dropzone .dz-sub{color:var(--text-muted);font-size:.92rem;margin:0}.dropzone .dz-browse{color:var(--brand);text-decoration:underline}.trust-line{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:14px;font-size:.9rem;color:var(--success);font-weight:600}.trust-line .lock{flex:none}.file-list{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.file-item{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px}.file-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600;font-size:.94rem}.file-size{color:var(--text-muted);font-size:.85rem;flex:none}.file-remove{flex:none;border:none;background:transparent;color:var(--text-muted);cursor:pointer;font-size:.95rem;padding:4px 6px;border-radius:6px;line-height:1}.file-remove:hover{background:var(--danger-soft);color:var(--danger)}.converter-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}.converter-actions .btn-primary{flex:1;min-width:160px}.progress{margin-top:18px}.progress-track{height:10px;background:var(--surface-2);border-radius:999px;overflow:hidden;border:1px solid var(--border)}.progress-bar{height:100%;width:0;background:var(--brand);border-radius:999px;transition:width .2s ease}.progress-label{margin:8px 0 0;font-size:.88rem;color:var(--text-muted);text-align:center}.result{margin-top:18px;padding:18px;background:var(--success-soft);border:1px solid var(--success);border-radius:var(--radius)}.result-heading{font-weight:700;color:var(--success);margin:0 0 12px}.result-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.error-box{margin-top:16px;padding:12px 16px;background:var(--danger-soft);border:1px solid var(--danger);color:var(--danger);border-radius:var(--radius-sm);font-size:.92rem;font-weight:600}.converter-page{padding:28px 0 0}.page-grid{display:grid;grid-template-columns:1fr;gap:28px}@media(min-width:960px){.page-grid{grid-template-columns:minmax(0,1fr) 300px;align-items:start}}.direct-answer{background:var(--brand-soft);border:1px solid var(--border);border-left:4px solid var(--brand);border-radius:var(--radius-sm);padding:14px 18px;margin:0 0 22px;font-size:1.02rem}.content-prose{max-width:720px}.content-prose ul{padding-left:1.2rem}.content-prose li{margin-bottom:.4rem}.facts-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.facts-list li{display:flex;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px}.facts-list .check{color:var(--brand);flex:none}.faq-item{border-bottom:1px solid var(--border);padding:6px 0}.faq-item summary{cursor:pointer;font-weight:700;padding:10px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--brand);font-weight:700}.faq-item[open] summary:after{content:"–"}.faq-item p{color:var(--text-muted);margin:0 0 12px}.related-links{display:flex;flex-wrap:wrap;gap:8px}.related-links a{background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:7px 14px;font-size:.9rem;font-weight:600;color:var(--text)}.related-links a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}.breadcrumbs{font-size:.85rem;color:var(--text-muted);margin-bottom:14px}.breadcrumbs a{color:var(--text-muted)}.breadcrumbs a:hover{color:var(--brand)}.breadcrumbs span{margin:0 6px}.updated{font-size:.82rem;color:var(--text-muted);margin-top:24px}.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:80px}.ad-slot{display:flex;align-items:center;justify-content:center;background:var(--surface-2);border:1px dashed var(--border);border-radius:var(--radius-sm);color:var(--text-muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}.ad-slot[data-size=leaderboard]{min-height:90px}.ad-slot[data-size=rectangle]{min-height:250px}.ad-slot[data-size=sidebar]{min-height:600px}@media(max-width:959px){.ad-slot[data-size=sidebar]{min-height:250px}}.hero{text-align:center;padding:clamp(36px,8vw,68px) 0 30px}.hero p.lead{font-size:1.15rem;color:var(--text-muted);max-width:640px;margin:0 auto 1.5rem}.search-box{max-width:560px;margin:0 auto;position:relative}.search-box input{width:100%;font:inherit;font-size:1.05rem;padding:15px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text)}.search-box input:focus{outline:2px solid var(--brand);border-color:var(--brand)}.search-results{list-style:none;margin:8px 0 0;padding:6px;position:absolute;left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:10;text-align:left}.search-results li a{display:block;padding:10px 14px;border-radius:var(--radius-sm);color:var(--text);font-weight:600}.search-results li a:hover{background:var(--brand-soft);text-decoration:none}.search-empty{padding:12px 14px;color:var(--text-muted)}.section-title{text-align:center;margin-top:3rem}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:1.2rem}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;font-weight:700;color:var(--text);display:flex;flex-direction:column;gap:4px;transition:border-color .15s,transform .1s}.tool-card:hover{border-color:var(--brand);transform:translateY(-2px);text-decoration:none}.tool-card .tc-from{color:var(--text-muted);font-weight:600;font-size:.9rem}.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:1.2rem}.cat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:block;color:var(--text)}.cat-card:hover{border-color:var(--brand);text-decoration:none}.cat-card .cat-emoji{font-size:1.8rem}.cat-card h3{margin:8px 0 4px}.cat-card p{color:var(--text-muted);font-size:.92rem;margin:0}.badges{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:center;margin:1.5rem 0 0;color:var(--text-muted);font-weight:600;font-size:.92rem}.badges span{display:inline-flex;align-items:center;gap:6px}.prose-page{padding:32px 0;max-width:760px}.prose-page h2{margin-top:1.8rem}.skip-link{position:absolute;left:-999px}.skip-link:focus{left:12px;top:12px;background:var(--surface);padding:10px 16px;border-radius:8px;z-index:50}