:root{--bg: #f7f8fa;--surface: #ffffff;--text: #1a2233;--muted: #5b6474;--border: #e3e7ee;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-soft: #eff4ff;--success: #16a34a;--danger: #dc2626;--radius: 12px;--shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04)}@media(prefers-color-scheme:dark){:root{--bg: #0f1420;--surface: #171e2e;--text: #e7ebf2;--muted: #9aa4b5;--border: #2a3348;--accent: #4f83f7;--accent-hover: #6d99f9;--accent-soft: #1c2740;--shadow: none}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}.container{max-width:1080px;margin:0 auto;padding: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;gap:1.25rem;height:56px}.brand{font-weight:700;font-size:1.1rem;color:var(--text);display:flex;align-items:center;gap:.4rem}.brand:hover{text-decoration:none}.nav-links{display:flex;gap:1rem;margin-left:auto;font-size:.95rem}.site-footer{border-top:1px solid var(--border);margin-top:4rem;padding:2rem 0;color:var(--muted);font-size:.9rem}.site-footer .container{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between}.hero{text-align:center;padding:3rem 0 2rem}.hero h1{font-size:clamp(1.7rem,4vw,2.6rem);margin:0 0 .5rem}.hero p{color:var(--muted);max-width:640px;margin:0 auto}.section-title{font-size:1.35rem;margin:2.5rem 0 1rem}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem;box-shadow:var(--shadow);color:var(--text);display:block;transition:border-color .15s,transform .15s}.tool-card:hover{border-color:var(--accent);transform:translateY(-2px);text-decoration:none}.tool-card .icon{font-size:1.6rem}.tool-card h3{margin:.4rem 0 .25rem;font-size:1.05rem}.tool-card p{margin:0;color:var(--muted);font-size:.88rem}.tool-head{text-align:center;padding:2rem 0 1rem}.tool-head h1{font-size:clamp(1.5rem,3.5vw,2.1rem);margin:0 0 .4rem}.tool-head p{color:var(--muted);max-width:620px;margin:0 auto}.tool-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;margin:1.5rem auto;max-width:760px}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:2.5rem 1rem;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:var(--accent-soft)}.dropzone .dz-icon{font-size:2rem}.dropzone p{margin:.5rem 0 0;color:var(--muted)}.dropzone 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0;padding:0;display:flex;flex-direction:column;gap:.5rem}.file-list li{display:flex;align-items:center;gap:.75rem;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.5rem .75rem;font-size:.92rem}.file-list .fname{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-list .fsize{color:var(--muted);white-space:nowrap}.file-list .saved{color:var(--success);font-weight:600;white-space:nowrap}.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem;margin-top:1rem}.result-grid figure{margin:0;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.5rem;text-align:center}.result-grid img,.result-grid canvas{max-width:100%;border-radius:4px}.result-grid figcaption{font-size:.8rem;color:var(--muted);margin-top:.3rem}.status{color:var(--muted);font-size:.92rem;min-height:1.4em;margin:.5rem 0}.status.error{color:var(--danger)}textarea.output{width:100%;min-height:140px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.6rem;font-family:ui-monospace,monospace;font-size:.82rem}.content-block{max-width:760px;margin:2.5rem auto}.content-block h2{font-size:1.3rem}.content-block ol li,.content-block ul li{margin-bottom:.4rem}.faq details{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:.8rem 1rem;margin-bottom:.6rem}.faq summary{font-weight:600;cursor:pointer}.faq p{color:var(--muted);margin:.6rem 0 0}.privacy-note{display:flex;gap:.5rem;align-items:center;justify-content:center;font-size:.85rem;color:var(--success);margin-top:.75rem}.ad-slot{margin:1.5rem auto;text-align:center;max-width:760px}.related{max-width:760px;margin:2rem auto}