.app-container{min-height:100vh;display:flex;flex-direction:column;padding:0}.main-content{flex:1;width:100%;position:relative;overflow:visible}.placeholder-page{padding:100px 32px;text-align:center;display:flex;flex-direction:column;gap:40px;align-items:center}.placeholder-content{background:#fff;padding:64px;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);max-width:600px;width:100%}.placeholder-content h1{color:var(--secondary);margin-bottom:20px}.placeholder-content p{color:var(--text-secondary)}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:48px;height:48px;border-radius:50%;background:var(--primary, #1a5f4a);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px #0003;transition:background .2s,transform .2s;z-index:100}.back-to-top:hover{background:var(--secondary, #2d8a5f);transform:translateY(-2px)}.back-to-top .material-symbols-outlined{font-size:24px}