:root{--sb-green: #3ECF8E;--bg-gray: #f9fafb;--border-color: #e4e4e7}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-gray);color:#1a1a1a}.app-shell{display:flex;flex-direction:column;min-height:100vh}header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background:#fff;border-bottom:1px solid var(--border-color)}.phase-nav{padding:.5rem 2rem;background:#fff;border-bottom:1px solid var(--border-color);overflow-x:auto}.phase-picker{display:flex;gap:1rem}.phase-link{display:flex;flex-direction:column;padding:.5rem 1rem;text-decoration:none;color:#666;border-radius:6px;min-width:120px}.phase-link.active{background:#f0fdf4;color:var(--sb-green)}.phase-id{font-size:.75rem;font-weight:700}main{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%;box-sizing:border-box}.placeholder-box{padding:2rem;background:#f3f4f6;border:1px dashed #d1d5db;border-radius:8px;text-align:center;color:#6b7280}.login-container{max-width:400px;margin:100px auto;padding:2rem;background:#fff;border-radius:12px;box-shadow:0 4px 6px -1px #0000001a}input,button,select{font-family:inherit;padding:.5rem 1rem;border-radius:6px;border:1px solid var(--border-color)}button{background:var(--sb-green);color:#fff;border:none;cursor:pointer;font-weight:500}button:disabled{opacity:.5;cursor:not-allowed}.logout-btn{background:transparent;color:#ef4444}.loading{padding:2rem;text-align:center}.error-screen{padding:2rem;text-align:center;color:#ef4444}.error-details{margin-top:1rem;padding:1rem;background:#fef2f2;border:1px solid #fee2e2;border-radius:8px;display:inline-block}