.app-container{display:flex;width:100%;min-height:100vh;background:#f5f5f5}.sidebar{width:240px;min-width:240px;background:#1a1a2e;color:#e0e0e0;display:flex;flex-direction:column;padding:20px 0}.sidebar-header{padding:0 20px 20px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-header h1{font-size:24px;color:#fff;margin:0 0 4px}.sidebar-header .subtitle{font-size:12px;color:#ffffff80;margin:0}.sidebar-nav{flex:1;padding:20px 0;display:flex;flex-direction:column;gap:4px}.nav-item{display:block;padding:10px 20px;color:#ffffffb3;text-decoration:none;font-size:14px;transition:all .2s}.nav-item:hover{background:#ffffff1a;color:#fff}.sidebar-footer{padding:20px;border-top:1px solid rgba(255,255,255,.1);font-size:12px;color:#fff6}.main-content{flex:1;padding:20px;overflow-y:auto}.page-container{max-width:900px;margin:0 auto}.page-title{font-size:24px;font-weight:600;color:#1a1a2e;margin-bottom:20px}.sprint-placeholder{background:#fff;border-radius:12px;padding:40px;text-align:center;color:#888;font-size:16px;box-shadow:0 2px 8px #00000014}.sprint-placeholder .icon{font-size:48px;margin-bottom:16px}.sprint-placeholder .hint{font-size:13px;color:#aaa;margin-top:8px}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.page-loading{padding:20px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;font-weight:400;color:#213547;background-color:#f5f5f5;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;display:flex}#root{display:flex;width:100%;min-height:100vh}