:root{color-scheme:light;--bg: #fff8ef;--panel: #ffffff;--line: #ecdfcc;--fg: #33291f;--dim: #8a7a68;--shadow-1: 0 1px 2px #33291f0a, 0 6px 18px #33291f08;--shadow-2: 0 8px 24px #33291f24;--accent: #f2643c;--accent-ink: #ffffff;--accent-soft: #ffeee7;--mint: #0f9d8a;--warn-line: #e2a33a;--warn-bg: #fff4de;--warn-fg: #7b5613;--danger: #c8362a;--canvas-bg: #fdfaf4}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,sans-serif}.app{max-width:1400px;margin:0 auto;padding:24px 20px 64px}header h1{margin:0;font-size:22px;letter-spacing:.5px;color:var(--accent)}header .sub{margin:4px 0 20px;color:var(--dim)}.layout{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}@media(max-width:900px){.layout{grid-template-columns:1fr}}aside,main{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow-1)}.drop{border:2px dashed 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