:root{--twc-navy:#00254a;--twc-navy-soft:#0a3a6b;--twc-bg:#f4f6f9;--twc-border:#d8dee6;--twc-text:#1c2733;--twc-muted:#6b7785;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--twc-bg);color:var(--twc-text)}.login-screen{background:var(--twc-navy);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{text-align:center;background:#fff;border-radius:12px;width:90%;max-width:360px;padding:2.5rem;box-shadow:0 12px 40px #00000040}.login-title{color:var(--twc-navy);margin:0 0 .25rem;font-size:1.5rem}.login-subtitle{color:var(--twc-muted);margin:0 0 1.75rem;font-size:.9rem}.login-button{background:var(--twc-navy);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:.75rem 1rem;font-size:1rem}.login-button:hover{background:var(--twc-navy-soft)}.shell{min-height:100vh;display:flex}.shell-sidebar{background:var(--twc-navy);color:#fff;flex-direction:column;flex-shrink:0;width:230px;display:flex}.shell-brand{border-bottom:1px solid #ffffff1f;padding:1.25rem 1.25rem 1rem;font-size:1.05rem;font-weight:600}.shell-nav{flex-direction:column;padding:.75rem 0;display:flex}.shell-nav-item{color:#ffffffd1;text-align:left;cursor:pointer;background:0 0;border:none;padding:.7rem 1.25rem;font-size:.95rem}.shell-nav-item:hover{background:#ffffff14}.shell-nav-item.is-active{color:#fff;background:#ffffff29;font-weight:600}.shell-main{flex-direction:column;flex:1;display:flex}.shell-header{border-bottom:1px solid var(--twc-border);background:#fff;justify-content:space-between;align-items:center;height:60px;padding:0 1.5rem;display:flex}.shell-section-title{font-size:1.1rem;font-weight:600}.shell-header-right{align-items:center;gap:1rem;display:flex}.shell-account{color:var(--twc-muted);font-size:.9rem}.shell-logout{border:1px solid var(--twc-border);cursor:pointer;background:0 0;border-radius:6px;padding:.4rem .9rem;font-size:.9rem}.shell-logout:hover{background:var(--twc-bg)}.shell-content{flex:1;padding:2rem}.shell-placeholder{border:1px dashed var(--twc-border);text-align:center;color:var(--twc-muted);background:#fff;border-radius:12px;padding:3rem}.shell-placeholder h2{color:var(--twc-text);margin:0 0 .5rem}