:root{color:#111827;background:#eef2f6;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}html,body,#app{height:100%;min-height:100%}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100dvh}button,input,textarea{font:inherit}button{min-height:44px;border:0;border-radius:8px;background:#0f766e;color:#fff;font-weight:700;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.secondary{min-width:72px;border:1px solid #cbd5e1;background:#fff;color:#1f2937}.shell{display:grid;height:100dvh;min-height:100vh;padding:24px;place-items:center}.unlock-panel,.chat{width:min(100%,760px);border:1px solid #d7dee8;border-radius:8px;background:#fff;box-shadow:0 20px 45px #0f172a1a}.unlock-panel{display:grid;gap:28px;padding:32px}.eyebrow{margin:0 0 8px;color:#0f766e;font-size:.78rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1{margin:0;color:#0f172a;font-size:clamp(2rem,6vw,4rem);line-height:1}.intro{max-width:520px;margin:16px 0 0;color:#475569;font-size:1rem;line-height:1.55}.unlock-form{display:grid;gap:10px}label{color:#334155;font-size:.92rem;font-weight:700}input,textarea{width:100%;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:#111827;font-size:16px;outline:none}input{height:48px;padding:0 14px}textarea{height:56px;min-height:56px;max-height:56px;resize:none;padding:12px 14px;line-height:1.4}input:focus,textarea:focus{border-color:#0f766e;box-shadow:0 0 0 3px #0f766e29}.chat{display:grid;grid-template-rows:auto auto 1fr auto;height:min(760px,calc(100dvh - 48px));min-height:520px;overflow:hidden}.chat-header{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid #e2e8f0;padding:18px 20px}.chat-header h1{font-size:1.35rem;line-height:1.1}.messages{display:flex;flex-direction:column;gap:12px;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:20px}.message{align-self:flex-start;width:fit-content;max-width:min(76%,560px);border-radius:8px;background:#e6f6f3;padding:12px 14px 8px}.message.own{align-self:flex-end;background:#dbeafe}.message p{overflow-wrap:anywhere;margin:0;color:#10201f;line-height:1.45;white-space:pre-wrap}.message.own p{color:#0f1f3a}.message time{display:block;margin-top:6px;color:#64748b;font-size:.75rem;text-align:right}.composer{display:grid;grid-template-columns:minmax(112px,160px) 1fr 96px;gap:12px;align-content:start;align-items:start;border-top:1px solid #e2e8f0;padding:14px}.nickname-input,.composer button{height:56px}.empty,.notice,.error{margin:0;color:#64748b}.empty{align-self:center;justify-self:center;padding:32px 12px;text-align:center}.notice{border-bottom:1px solid #fed7aa;background:#fff7ed;padding:10px 20px;color:#9a3412}.error{color:#b91c1c}@media(max-width:640px){body{overflow:hidden}.shell{height:100dvh;min-height:100dvh;padding:0;place-items:stretch}.unlock-panel,.chat{width:100%;min-height:100dvh;border:0;border-radius:0;box-shadow:none}.unlock-panel{align-content:center;overflow-y:auto;padding:max(24px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left))}.chat{display:flex;flex-direction:column;height:100dvh;max-height:100dvh;min-height:0}.chat-header{padding:calc(14px + env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 14px max(16px,env(safe-area-inset-left))}.messages{flex:1 1 auto;min-height:0;padding:14px max(14px,env(safe-area-inset-right)) 14px max(14px,env(safe-area-inset-left))}.message{max-width:92%}.composer{flex:0 0 auto;grid-template-columns:minmax(96px,34%) 1fr;gap:10px;padding:12px max(12px,env(safe-area-inset-right)) calc(12px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}.composer button{grid-column:1 / -1;height:44px;width:100%}}