:root{--nav:#0f2742;--blue:#1f5f9f;--bg:#f4f7fb;--card:#fff;--line:#e4eaf2;--text:#172133;--muted:#657386;--accent:#e67e22;--green:#2e9d62;--red:#c0392b}*{box-sizing:border-box}body{margin:0;font-family:Arial,'Noto Sans KR',sans-serif;background:var(--bg);color:var(--text)}.layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.side{background:var(--nav);color:white;padding:22px;position:sticky;top:0;height:100vh;overflow:auto}.brand{font-weight:800;font-size:20px;margin-bottom:4px}.sub{font-size:12px;color:#b9c7d8;margin-bottom:18px}.nav a{display:block;color:#dce7f4;text-decoration:none;padding:10px 12px;border-radius:10px;margin:3px 0;font-size:14px}.nav a:hover,.nav a.active{background:#1f466d;color:white}.main{padding:30px;max-width:1280px}.hero{background:linear-gradient(135deg,#123b63,#2f80ed);color:white;border-radius:22px;padding:28px;margin-bottom:22px}.hero h1{margin:0 0 8px;font-size:30px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 24px #1b2a4410}.kpi{font-size:28px;font-weight:800;color:var(--blue)}.label{color:var(--muted);font-size:13px}.tag{display:inline-block;border-radius:999px;background:#edf4ff;color:#1f5f9f;padding:5px 10px;font-size:12px;font-weight:700}.warn{background:#fff6e8;color:#a85d00}.risk{background:#ffecec;color:#b42424}.ok{background:#eaf8f0;color:#227345}table{width:100%;border-collapse:separate;border-spacing:0;background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden;margin:16px 0}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#123b63;color:white;font-size:13px}td{font-size:14px;line-height:1.45}.section{margin:24px 0}.section h2{font-size:22px}.flow{display:grid;gap:12px}.step{background:white;border-left:6px solid var(--blue);border-radius:14px;padding:16px;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.step b{color:var(--blue)}.footer{color:var(--muted);font-size:12px;margin:30px 0}@media(max-width:980px){.layout{grid-template-columns:1fr}.side{position:relative;height:auto}.grid,.grid3{grid-template-columns:1fr}.main{padding:18px}}

.diagram-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:0 8px 24px #1b2a4410;overflow:auto}.diagram-card svg{width:100%;min-width:860px;height:auto;display:block}.usage-mini{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.usage-mini div{background:white;border:1px solid var(--line);border-radius:16px;padding:16px}.usage-mini b{display:block;color:var(--blue);margin-bottom:8px}.usage-mini span{font-size:13px;color:var(--muted);line-height:1.45}.cta{display:inline-block;background:var(--blue);color:white;text-decoration:none;border-radius:999px;padding:11px 16px;font-weight:800}.flow .step span{display:block;color:var(--muted);font-size:14px;margin-top:6px;line-height:1.5}@media(max-width:900px){.layout{grid-template-columns:1fr}.side{position:relative;height:auto}.grid,.grid3,.usage-mini{grid-template-columns:1fr}.main{padding:18px}.diagram-card svg{min-width:760px}}

.sheet-action-panel{background:#ffffff;border:2px solid #b9d7ff;border-radius:22px;padding:18px;margin:22px 0;box-shadow:0 10px 28px #1f5f9f18}.sheet-action-panel h2{margin-top:0}.sheet-action-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:12px 0}.sheet-action-grid button{border:0;border-radius:14px;padding:13px 12px;background:var(--blue);color:white;font-weight:800;cursor:pointer}.sheet-action-grid button:nth-child(2){background:var(--green)}.sheet-action-grid button:nth-child(3){background:var(--accent)}.sheet-action-grid button:nth-child(4){background:#9b59b6}.sheet-action-inputs{display:grid;grid-template-columns:180px 1fr;gap:10px}.sheet-action-inputs input{border:1px solid var(--line);border-radius:12px;padding:11px 12px;font-size:14px}.sheet-action-status{margin-top:10px;color:var(--blue);font-weight:800}.sheet-action-note{font-size:13px;color:var(--muted);line-height:1.5}@media(max-width:900px){.sheet-action-grid,.sheet-action-inputs{grid-template-columns:1fr}}