:root{color-scheme:light;--bg: #faf6f0;--dot: #e9dfd2;--card: #ffffff;--border: #ece5db;--border-dashed: #d9cdbd;--text: #44403c;--text-dim: #8c857c;--accent: #c8654a;--accent-strong: #b4543b;--accent-tint: rgba(200, 101, 74, .1);--btn: #e89b8b;--btn-hover: #e08877;--ok: #4e9a6b;--ok-text: #2f6b46;--ok-bg: #f0f7f1;--ok-border: #c2ddc9;--err: #be4a33;--err-bg: #fbeeea;--err-border: #f0c6ba;--radius-card: 16px;--radius-btn: 14px;--shadow: 0 1px 2px rgba(68, 64, 60, .04), 0 10px 28px rgba(68, 64, 60, .06);font-family:Plus Jakarta Sans,-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans CJK JP,Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100vh;color:var(--text);background-color:var(--bg);background-image:radial-gradient(var(--dot) 1px,transparent 1px);background-size:18px 18px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;display:flex;justify-content:center}.app{width:100%;max-width:680px;padding:56px 28px 80px}.app h1{font-size:26px;font-weight:800;letter-spacing:-.01em;color:var(--accent);margin:0 0 6px}.app .subtitle{color:var(--text-dim);font-size:13.5px;line-height:1.6;margin-bottom:32px}.dropzone{border:1.5px dashed var(--border-dashed);border-radius:var(--radius-card);background:var(--card);box-shadow:var(--shadow);padding:28px 26px;cursor:pointer;transition:border-color .14s ease,background .14s ease,box-shadow .14s ease}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent);background:#fffdfb}.dropzone.filled{border-style:solid;border-color:var(--ok-border);background:var(--ok-bg)}.dropzone .label{display:flex;align-items:baseline;gap:8px;font-weight:700;font-size:15px;color:var(--text);margin-bottom:6px}.dropzone .step{color:var(--accent);font-weight:800;font-size:16px;flex:none}.dropzone .hint{color:var(--text-dim);font-size:12.5px;line-height:1.55;padding-left:24px}.dropzone .fileline{display:flex;align-items:center;gap:8px;margin-top:14px;padding-left:24px;font-size:13px;color:var(--text);word-break:break-all}.dropzone .fileline.err{color:var(--err)}.check{flex:none;display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:var(--ok);color:#fff;font-size:11px;font-weight:800;line-height:1}.section-gap{height:18px}.row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:18px 0 6px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow);padding:20px 24px}.row label{display:flex;align-items:baseline;gap:8px;font-size:14px;font-weight:700;color:var(--text);min-width:150px}.row label .step{color:var(--accent);font-weight:800;font-size:16px}input[type=number]{background:#fff;color:var(--text);border:1px solid var(--border-dashed);border-radius:10px;padding:9px 12px;font-size:15px;width:110px;font-family:inherit;transition:border-color .12s ease,box-shadow .12s ease}input[type=number]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}.hint-inline{font-size:12.5px;color:var(--text-dim)}button.primary{background:var(--btn);color:#fff;border:none;border-radius:var(--radius-btn);padding:16px 20px;font-size:15px;font-weight:700;letter-spacing:.01em;cursor:pointer;margin-top:22px;width:100%;box-shadow:0 8px 20px #e89b8b66;transition:background .13s ease,transform .1s ease,box-shadow .13s ease}button.primary:hover:not(:disabled){background:var(--btn-hover);box-shadow:0 10px 24px #e0887773}button.primary:active:not(:disabled){transform:scale(.985)}button.primary:disabled{background:#efe7dd;color:#b9b0a4;box-shadow:none;cursor:not-allowed}.result{margin-top:20px;padding:16px 18px;border-radius:var(--radius-card);font-size:13.5px;line-height:1.6;border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow)}.result.ok{background:var(--ok-bg);border-color:var(--ok-border);color:var(--ok-text)}.result.err{background:var(--err-bg);border-color:var(--err-border);color:var(--err);white-space:pre-wrap}.result a{color:var(--accent);font-weight:700}.result a:hover{color:var(--accent-strong)}.spinner{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:middle;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}