:root{--primary-1: #2f39a9;--primary-2: #2e6fa0;--primary-3: #49a4bb;--accent: #15d8b3;--bg-dark: #121824;--bg-surface: #1a2332;--text-main: #f0f4f8;--text-muted: #94a3b8;--border-color: rgba(255, 255, 255, .08)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;width:100%;overflow:hidden;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg-dark);color:var(--text-main)}.app-container{display:flex;height:100vh;width:100vw;overflow:hidden;position:relative}.main-wrapper{flex:1;display:flex;flex-direction:column;height:100vh;overflow:hidden}.mobile-header{display:none;padding:16px;background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);align-items:center;gap:16px}.menu-toggle{background:none;border:none;color:var(--text-main);font-size:1.5rem;cursor:pointer}.content-area{flex:1;overflow-y:auto;padding:32px}.backdrop{display:none;position:fixed;inset:0;background-color:#0009;z-index:90}.btn{padding:10px 20px;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;border:none}.btn:disabled{cursor:not-allowed}@media(max-width:768px){.backdrop.open{display:block}.mobile-header{display:flex}.content-area{padding:16px}}@media(max-width:576px){.btn{width:100%;text-align:center}}