.pstrip{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:780px;margin:14px auto}
.pc{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;display:flex;flex-direction:column;gap:2px}
.pc b{font-size:.95rem}.pc .pp{font-size:1.4rem;font-weight:800}.pc .pp small{font-size:.8rem;color:var(--muted);font-weight:500}
.pc>small{color:var(--muted);font-size:.78rem;line-height:1.3}.pc .btn{margin-top:6px;text-align:center}
.pc.feat{border:2px solid var(--mint);background:#f3fbf7}.pc em{position:absolute;top:-10px;right:10px;background:var(--mint);color:#fff;font-style:normal;font-size:.7rem;font-weight:700;border-radius:999px;padding:1px 8px}
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;max-width:980px;margin:22px auto 0;padding:0 18px}
.fc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.fc i{font-style:normal;font-size:1.5rem}.fc h3{margin:6px 0 4px;font-size:1rem}.fc p{margin:0;color:var(--muted);font-size:.9rem}
.how{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;max-width:980px;margin:20px auto 0;padding:0 18px}
.how div{background:var(--mint-soft);border-radius:999px;padding:6px 14px;font-size:.92rem;font-weight:600;color:var(--mint-2)}
.how b{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--mint);color:#fff;font-size:.8rem;margin-right:6px}
.qcards{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0 4px}
.qcards button{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;text-align:left;display:flex;flex-direction:column;gap:2px;color:var(--text)}
.qcards button:hover{border-color:var(--mint)}.qcards i{font-style:normal;font-size:1.3rem}.qcards span{color:var(--muted);font-size:.85rem}
.app.chatting .pstrip,.app.chatting .feats,.app.chatting .how,.app.chatting .qcards{display:none}
@media(max-width:800px){.pstrip{grid-template-columns:1fr 1fr 1fr;gap:6px;padding:0 10px}.pc{padding:8px}.pc>small{font-size:.66rem}.pc .pp{font-size:1.1rem}.pc b{font-size:.78rem}.feats,.qcards{grid-template-columns:1fr 1fr}}

/* B: no sidebar, centered chat + quick-start cards */
.sidebar,#sb-open{display:none!important}.app.collapsed .topbar-logo,.topbar-logo{display:flex}
.topbar{border-bottom:1px solid var(--line);background:#fff;padding:10px 24px}
.hero{padding:28px 20px 6px}
body{background:radial-gradient(ellipse at top,#e3f7ee,var(--bg) 60%)}
/* B final: drawer menu */
.sidebar{display:flex!important;position:fixed;left:0;top:0;z-index:40;height:100vh;width:280px;transform:translateX(-105%);transition:transform .22s ease;box-shadow:4px 0 24px rgba(0,0,0,.14);margin-left:0!important}
.app.menu-open .sidebar{transform:none}
.app.menu-open .scrim{display:block;position:fixed;inset:0;background:rgba(10,30,22,.35);z-index:30}
#sb-open{display:grid!important}.topbar{gap:8px}.topbar .tb-right{margin-left:auto;display:flex;gap:8px}.topbar .btn{margin-left:0}
.topbar .btn{white-space:nowrap}@media(max-width:480px){.tb-new span{display:none}.topbar{padding:10px 12px}.topbar-logo{font-size:1rem}}