:root{--accent:#2563eb;--accent-weak:#eff4ff;--bg:#f7f8fa;--surface:#fff;--border:#e5e7eb;--border-strong:#d1d5db;--text:#111827;--muted:#6b7280;--ok:#15803d;--warn:#b45309;--radius:10px;--rail-w:160px;--max-main:760px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.55}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.topbar{height:56px;padding:0 16px;background:var(--surface);border-bottom:1px solid var(--border)}.brand,.topbar{display:flex;align-items:center}.brand{gap:8px;font-weight:700;font-size:20px;color:var(--text)}.brand:hover{text-decoration:none}.shell{display:grid;grid-template-columns:1fr;grid-gap:16px;gap:16px;max-width:1200px;margin:0 auto;padding:16px}.adrail{display:none}.main{min-width:0;width:100%;max-width:var(--max-main);margin:0 auto}@media (min-width:1024px){.shell{grid-template-columns:var(--rail-w) minmax(0,1fr) var(--rail-w);align-items:start}.adrail{display:block;position:-webkit-sticky;position:sticky;top:16px}.adslot{width:var(--rail-w);height:600px;background:repeating-linear-gradient(45deg,#f0f1f4,#f0f1f4 10px,#eceef2 0,#eceef2 20px);border:1px dashed var(--border-strong);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px}}.foot{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:13px;padding:24px 16px 40px}.foot-sep{opacity:.4}.foot-link{color:var(--muted);text-decoration:underline;text-underline-offset:2px}.foot-link:hover{color:var(--accent)}.contact-type-toggle{display:flex;gap:8px;margin-bottom:20px}.contact-type-btn{flex:1 1;padding:10px 14px;border:1.5px solid var(--border-strong);border-radius:var(--radius);background:var(--surface);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;color:var(--muted);transition:border-color .12s,color .12s,background .12s}.contact-type-btn:hover{border-color:var(--accent);color:var(--text)}.contact-type-btn.active{border-color:var(--accent);background:var(--accent-weak);color:var(--accent)}.contact-form{display:grid;grid-gap:14px;gap:14px}.contact-form textarea{width:100%;padding:10px;border:1px solid var(--border-strong);border-radius:var(--radius);font-size:15px;font-family:inherit;background:var(--surface);color:var(--text);resize:vertical;min-height:110px}.contact-form textarea:focus{outline:2px solid var(--accent);outline-offset:1px}.contact-required{color:#b91c1c;font-size:12px}.contact-success-icon{width:52px;height:52px;border-radius:50%;background:#dcfce7;color:var(--ok);font-size:26px;display:flex;align-items:center;justify-content:center;margin:0 auto}.hero h1{font-size:28px;margin:4px 0 6px}.hero p{color:var(--muted);margin:0 0 20px}.entry{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:24px}.entry .or{text-align:center;color:var(--muted);font-size:13px;margin:12px 0}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:12px;gap:12px}.card{display:block;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;color:var(--text);text-align:left;cursor:pointer;font-family:inherit;font-size:inherit;line-height:inherit}.card:hover{border-color:var(--accent);text-decoration:none}.card h3{margin:0 0 4px;font-size:16px}.card p{margin:0;color:var(--muted);font-size:14px}.back{font-size:14px;display:inline-block;margin-bottom:10px}.tool h1{font-size:24px;margin:0 0 4px}.tool .sub{color:var(--muted);margin:0 0 20px}.panel{border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}.dropzone,.panel{background:var(--surface)}.dropzone{border:2px dashed var(--border-strong);border-radius:12px;padding:28px 16px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone.drag,.dropzone:hover{border-color:var(--accent);background:var(--accent-weak)}.dropzone p{margin:0 0 4px;font-weight:500}.dropzone .hint{color:var(--muted);font-size:13px}.controls{display:grid;grid-gap:14px;gap:14px}.row{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));grid-gap:12px;gap:12px}.field,.row{display:grid}.field{grid-gap:4px;gap:4px}.field label{font-size:13px;color:var(--muted)}.field input,.field select{width:100%;height:40px;padding:0 10px;border:1px solid var(--border-strong);border-radius:var(--radius);font-size:15px;background:var(--surface);color:var(--text)}.field input[type=range]{padding:0;height:auto}.field input[type=color]{padding:2px;height:40px}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--accent);background:var(--accent);color:#fff;font-size:15px;font-weight:500;padding:10px 18px;border-radius:var(--radius);cursor:pointer}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.secondary{background:var(--surface);color:var(--accent)}.result{text-align:center}.result img{max-width:100%;border:1px solid var(--border);border-radius:8px;background:#fff}.meta{color:var(--muted);font-size:14px;margin:10px 0}.badge-ok{color:var(--ok);font-weight:500}.badge-warn{color:var(--warn);font-weight:500}.error{color:#b91c1c;font-size:14px;margin-top:8px}.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));grid-gap:10px;gap:10px;margin-top:12px}.thumbs figure{margin:0;text-align:center}.thumbs img{width:100%;border:1px solid var(--border);border-radius:6px}.thumbs figcaption{font-size:12px;color:var(--muted);margin-top:4px}.note{font-size:13px;background:var(--accent-weak);border-radius:8px;padding:10px 12px}.note,.range-hint{color:var(--muted)}.range-hint{font-size:12px;margin-top:2px}.mode-cards{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px;margin-top:6px}.mode-card{display:flex;flex-direction:column;gap:5px;padding:12px 14px;border:1.5px solid var(--border-strong);border-radius:var(--radius);background:var(--surface);text-align:left;cursor:pointer;font-family:inherit;font-size:inherit;line-height:1.45;color:var(--text);transition:border-color .12s}.mode-card.active,.mode-card:hover{border-color:var(--accent)}.mode-card.active{background:var(--accent-weak)}.mode-card strong{font-size:14px}.mode-card span{font-size:12px;color:var(--muted)}.mode-card.active span{color:var(--text)}.compress-progress{position:relative;height:28px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.compress-progress-bar{position:absolute;inset:0 auto 0 0;background:var(--accent);opacity:.18;transition:width .2s ease}.compress-progress-label{position:absolute;inset:0;justify-content:center;color:var(--text)}.compress-progress-label,.file-info{display:flex;align-items:center;font-size:13px}.file-info{margin:10px 0 0;color:var(--muted);gap:6px;flex-wrap:wrap}.fi-label{font-weight:600;color:var(--text)}.live-preview{margin-top:12px}.live-preview .preview-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}.live-preview img{max-width:100%;border:1px solid var(--border);border-radius:8px;background:#fff}.live-preview .preview-meta{font-size:13px;color:var(--muted);margin-top:6px}