:root{--bg: #ffffff;--sidebar-bg: #fbfbfa;--text: #37352f;--muted: #787066;--border: #e9e7e2;--border-strong: #d6d3cc;--accent: #2f3437;--accent-hover: #000000;--sel: #2f6fed;--sel-soft: #eaf1fe;--success: #2f6b32;--error: #b3261e;--error-bg: #fdecea;--radius: 8px}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}#root{height:100%}.app{display:flex;align-items:stretch;min-height:100vh}.main{flex:1;min-width:0;padding:48px 40px 80px;max-width:760px;margin:0 auto;width:100%}.header{margin-bottom:28px}.header h1{font-size:28px;font-weight:700;margin:0 0 6px;letter-spacing:-.02em}.tagline{margin:0;color:var(--muted);font-size:15px}.muted{color:var(--muted);font-size:13.5px;line-height:1.5}.hint{margin-top:12px}.dropzone{text-align:center;cursor:pointer;border:1px dashed var(--border-strong);border-radius:var(--radius);padding:56px 24px;transition:border-color .15s ease,background .15s ease}.dropzone:hover{border-color:var(--accent);background:#fafafa}.dropzone-icon{font-size:30px;margin-bottom:10px}.dropzone-title{font-size:17px;font-weight:600;margin-bottom:4px}.preview{margin-bottom:18px}.preview-stage{position:relative;margin:0 auto;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;line-height:0;box-shadow:0 1px 3px #0f0f0f0f}.preview-canvas{display:block;width:100%;height:auto}.preview-seal{position:absolute;height:auto;cursor:pointer}.preview-seal.is-selected{outline:2px dashed var(--sel);outline-offset:2px}.preview-hint{text-align:center;margin:12px 0 0}.doc-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.doc-strip{display:flex;flex-wrap:wrap;gap:8px;min-width:0}.doc-chip{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--border);border-radius:999px;padding:4px 6px 4px 12px;max-width:240px;font-size:13px}.doc-chip.is-active{border-color:var(--sel);background:var(--sel-soft)}.doc-chip-name{border:none;background:transparent;cursor:pointer;font:inherit;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}.doc-add{cursor:pointer;background:transparent;color:var(--muted);padding:5px 14px;border-style:dashed;border-color:var(--border-strong)}.doc-add:hover{color:var(--text);border-color:var(--accent)}.actions{display:flex;gap:10px;margin-top:4px}.results{margin-top:18px}.result-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}.result-item{display:flex;align-items:center;justify-content:space-between;gap:8px;border:1px solid var(--border);border-radius:var(--radius);padding:9px 12px}.result-name{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;min-width:0}.sidebar{width:320px;flex-shrink:0;background:var(--sidebar-bg);border-left:1px solid var(--border);padding:24px 20px;overflow-y:auto;position:sticky;top:0;height:100vh}.sidebar.is-collapsed{display:none}.sidebar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.sidebar-title{font-size:16px;font-weight:600}.sidebar-sub{margin:0 0 16px}.sidebar-reopen{position:fixed;top:20px;right:0;z-index:10;border:1px solid var(--border);border-right:none;border-radius:8px 0 0 8px;background:var(--bg);color:var(--text);font:inherit;font-size:13px;font-weight:500;padding:9px 14px;cursor:pointer;box-shadow:-1px 1px 4px #0f0f0f0f}.sidebar-reopen:hover{background:#fafafa}.seal-list{display:flex;flex-direction:column;gap:8px}.seal-item{border:1px solid var(--border);border-radius:var(--radius);background:#fff;transition:border-color .15s ease,opacity .15s ease}.seal-item.is-selected{border-color:var(--sel)}.seal-item.is-disabled{opacity:.55}.seal-item-row{display:flex;align-items:center;gap:8px;padding:8px 10px;cursor:pointer}.seal-item-thumb{width:36px;height:36px;flex-shrink:0;border:1px solid var(--border);border-radius:6px;background:#fbfbfa;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:3px}.seal-item-thumb img{max-width:100%;max-height:100%;object-fit:contain}.seal-item-name{flex:1;min-width:0;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.seal-controls{padding:4px 12px 14px;border-top:1px solid var(--border)}.locked-note{font-size:12px;color:var(--muted);margin:10px 0 2px}.seal-add{display:flex;align-items:center;justify-content:center;gap:6px;border:1px dashed var(--border-strong);border-radius:var(--radius);background:transparent;color:var(--muted);font:inherit;font-size:13px;padding:12px;cursor:pointer;transition:color .15s ease,border-color .15s ease}.seal-add:hover{color:var(--text);border-color:var(--accent)}.seal-add-plus{font-size:16px}.remove-all{width:100%;margin-top:14px}.checkbox input{width:16px;height:16px;accent-color:var(--accent);cursor:pointer;display:block}.icon-btn{border:none;background:transparent;cursor:pointer;font-size:13px;line-height:1;padding:4px 5px;border-radius:6px;color:var(--muted);transition:background .15s ease,color .15s ease}.icon-btn:hover{background:#efeee9;color:var(--text)}.icon-btn.is-on{color:var(--text)}.controls{display:flex;flex-direction:column;gap:12px;margin-top:12px}.controls.is-disabled{opacity:.5}.control{display:flex;flex-direction:column;gap:6px;font-size:12.5px}.control span{color:var(--muted)}.control input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.control input[type=range]:disabled{cursor:default}.btn{font:inherit;font-size:14px;font-weight:500;border-radius:var(--radius);padding:9px 16px;cursor:pointer;border:1px solid transparent;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:background .15s ease,border-color .15s ease,color .15s ease,opacity .15s ease}.btn-sm{padding:6px 12px;font-size:13px}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:default}.btn-ghost{background:transparent;color:var(--muted);border-color:var(--border-strong)}.btn-ghost:hover{color:var(--text);border-color:var(--accent)}.banner{border-radius:var(--radius);padding:11px 14px;font-size:14px;margin-bottom:16px}.banner-success{background:#edf7ed;color:var(--success);margin-bottom:0}.banner-error{background:var(--error-bg);color:var(--error)}@media (max-width: 720px){.sidebar{position:fixed;right:0;top:0;z-index:20;box-shadow:-2px 0 12px #0f0f0f1a}.main{padding:40px 20px 64px}}