*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f0f2f5}#app{min-height:100vh}.student-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:linear-gradient(180deg,#0d3b6e,#1a5fa4);color:#fff;padding:2rem 0 0;flex-shrink:0;display:flex;flex-direction:column}.sidebar-header{padding:1rem 1.5rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.2);text-align:center}.sidebar-logo{width:100px;height:100px;object-fit:contain;margin-bottom:.75rem;background:#fff;border-radius:50%;padding:8px}.sidebar-header h2{font-size:1.1rem;font-weight:700}.sidebar-nav{padding:1rem 0;flex:1}.nav-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.5rem;color:#ffffffd9;text-decoration:none;transition:all .2s;font-size:.95rem}.nav-item:hover,.nav-item.router-link-active{background:#ffffff26;color:#fff}.nav-icon{font-size:1.1rem}.sidebar-footer{padding:1rem 1.5rem;border-top:1px solid rgba(255,255,255,.2)}.sidebar-footer .user-name{font-size:.85rem;font-weight:600;color:#fff}.sidebar-footer .user-email{font-size:.75rem;color:#fff9;margin-bottom:.75rem;word-break:break-all}.sidebar-footer .logout-btn{width:100%;padding:.5rem;background:#ffffff1a;color:#ffffffd9;border:1px solid rgba(255,255,255,.2);border-radius:6px;font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s}.sidebar-footer .logout-btn:hover{background:#fff3;color:#fff}.main-content{flex:1;display:flex;flex-direction:column}.top-bar{background:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:0 1px 3px #0000001a}.page-title{font-size:1.25rem;color:#1a1a2e}.user-info{font-size:.9rem;color:#666}.content-area{padding:2rem;flex:1}