:root{font-family:system-ui,sans-serif;color:#e8eef7;background:#08111f}body{margin:0}main{max-width:1100px;margin:auto;padding:24px}header{display:flex;gap:16px;align-items:center;padding:12px;background:#101f35}button,input,textarea{font:inherit;padding:10px;margin:4px;border-radius:8px;border:1px solid #315174}button{cursor:pointer;background:#1b6ca8;color:#fff}button:disabled{opacity:.5;cursor:not-allowed}.onboarding{display:grid;max-width:460px;gap:8px}.layout{display:grid;grid-template-columns:280px 1fr;gap:18px;margin-top:18px}aside,.conversation{background:#0e1b2d;padding:16px;border-radius:12px}aside>button{display:block;width:100%}.conversation textarea{width:calc(100% - 24px);min-height:80px}article{padding:10px;margin:8px 0;background:#162c48;border-radius:8px}article small{display:block;opacity:.7}.danger{color:#ff8a8a}.alpha-notice{margin:0 0 12px;padding:10px 12px;border:1px solid #f4b860;border-radius:10px;color:#ffe0a3;background:#3a2b12;font-weight:700}.status-note{padding:10px 12px;border-radius:8px;background:#263853}.message-list{min-height:260px;max-height:55vh;overflow-y:auto}.message-outgoing{margin-inline-start:12%;background:#174f6d}.message-incoming{margin-inline-end:12%}.selected-contact{outline:2px solid #9bd8ff}.web-alpha-shell button,.web-alpha-shell input,.web-alpha-shell textarea{min-height:44px}@media (max-width: 760px){.layout{grid-template-columns:1fr}main{padding:12px}header{flex-wrap:wrap}.message-list{min-height:40vh}}