:root{--paper:#efeae1;--ink:#1c1915;--muted:#6f685e;--line:#e2dbcf;--panel:#fffdf8;--stage:#12151a;--green:#0d6b4c;--green-soft:#e5f4ed;--amber:#f3d36a;--amber-ink:#6a4e09;--danger:#8d2d2d;--shadow:0 16px 40px rgba(40,32,20,0.08);color-scheme:light;font-family:PingFang SC,Noto Sans SC,WenQuanYi Micro Hei,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0}body{min-height:100vh;background:var(--paper);color:var(--ink)}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}a{color:inherit}.auth-screen,.list-screen{min-height:100vh;display:grid;place-items:center;padding:32px 16px}.auth-card,.list-card{width:min(440px,100%);background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:28px}.list-card{width:min(880px,100%)}.brand-mark{display:inline-flex;align-items:center;gap:8px;font-weight:700;letter-spacing:.04em}.brand-mark 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320px}.rail,.stage{min-height:0;overflow:auto}.rail{background:#f7f4ee;border-right:1px solid var(--line);padding:14px}.rail.right{border-right:0;border-left:1px solid var(--line);background:var(--panel)}.rail.is-readonly{background:#e8e4dc}.rail.is-readonly .drag-handle,.rail.is-readonly .step-actions button,.rail.is-readonly textarea{opacity:.4}.rail-title{display:flex;justify-content:space-between;align-items:baseline;margin:0 0 10px}.rail-title span,.section-label{color:var(--muted);font-size:12px}.step-list{display:grid;grid-gap:8px;gap:8px}.step-row{display:grid;grid-template-columns:16px 28px 52px minmax(0,1fr);grid-gap:8px;gap:8px;width:100%;text-align:left;border:1px solid transparent;background:#fff;border-radius:12px;padding:8px;cursor:pointer}.char-count{margin:6px 0 0;text-align:right;font-size:12px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.step-row.is-selected{border-color:#9dceba;background:var(--green-soft)}.drag-handle{color:#b3ab9e;cursor:-webkit-grab;cursor:grab;align-self:center}.step-index{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--muted);align-self:center}.thumb{height:36px;border-radius:6px;background:radial-gradient(circle at 6px 8px,#d7d2c8 2px,transparent 2.5px),radial-gradient(circle at 6px 28px,#d7d2c8 2px,transparent 2.5px),linear-gradient(160deg,#2b313b,#171b22);color:#f4efe4;display:grid;place-items:center;font-size:12px}.step-copy{min-width:0;overflow-x:hidden}.step-title{display:block;width:100%;padding:0;text-align:left;font-size:13px}.clamp-2{display:-webkit-box;width:100%;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2;overflow:hidden;overflow-wrap:anywhere;word-break:break-word;white-space:normal;line-height:1.45;max-height:calc(1.45em * 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