:root{--teal: #1f6f6b;--teal-dark: #175450;--cream: #faf7f0;--card: #ffffff;--ink: #223;--muted: #6b7280;--line: #e7e2d6;--accent: #e8a33d;--danger: #c0392b}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:ui-rounded,SF Pro Rounded,-apple-system,Segoe UI,Roboto,system-ui,sans-serif;color:var(--ink);background:var(--cream);-webkit-font-smoothing:antialiased}button{font:inherit;cursor:pointer}.gate{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(120% 100% at 50% 0%,#276f6b,#175450)}.gate-card{width:100%;max-width:340px;background:var(--card);border-radius:22px;padding:32px 26px 22px;text-align:center;box-shadow:0 24px 60px #00000047}.logo{font-size:46px}.gate-card h1{margin:6px 0 2px;font-size:28px;letter-spacing:-.01em}.gate-card .sub{margin:0 0 22px;color:var(--muted);font-size:14px}.code{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;font-size:16px;text-align:center}.code:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px #1f6f6b26}.btn{width:100%;margin-top:12px;padding:13px;border:0;border-radius:12px;background:var(--teal);color:#fff;font-size:16px;font-weight:700}.btn:hover{background:var(--teal-dark)}.btn:disabled{opacity:.6}.err{color:var(--danger);font-size:13px;min-height:18px;margin:10px 0 0}.screen{display:flex;flex-direction:column;min-height:100%;max-width:640px;margin:0 auto}.bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:10px;height:56px;padding:0 12px;background:var(--teal);color:#fff}.brand{font-weight:800;font-size:18px}.bar-title{font-weight:700;font-size:16px}.bar-sub{margin-left:auto;font-size:12px;opacity:.85}.bar-spacer{margin-left:auto}.back{background:transparent;border:0;color:#fff;font-size:30px;line-height:1;padding:0 6px}.link{margin-left:auto;background:transparent;border:0;color:#fff;font-size:14px;opacity:.9;text-decoration:underline}.pad{padding:18px 16px 40px}.lead{font-size:16px;color:var(--ink);margin:4px 0 18px}.hint{font-size:13px;color:var(--muted);margin:0 0 10px;text-transform:uppercase;letter-spacing:.04em}.tiles{display:grid;gap:12px}.tile{text-align:left;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:0 2px 8px #0000000a}.tile:hover{border-color:var(--teal)}.tile-name{font-size:18px;font-weight:800}.tile-subject{font-size:12px;color:var(--teal);font-weight:700;margin:2px 0 6px}.tile-blurb{font-size:13.5px;color:var(--muted);line-height:1.4}.tile-soon{opacity:.7;border-style:dashed;box-shadow:none}.modes{display:grid;gap:10px}.mode-card{display:flex;align-items:center;justify-content:space-between;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:15px 16px;font-size:15.5px;font-weight:600}.mode-card:hover{border-color:var(--teal)}.mode-card .arrow{color:var(--teal);font-size:20px}.chat-screen{height:100vh}.messages{flex:1;overflow-y:auto;padding:16px 12px 8px;display:flex;flex-direction:column;gap:10px}.empty{margin:auto;text-align:center;color:var(--muted)}.empty-emoji{font-size:34px}.bubble{max-width:84%;padding:10px 13px;border-radius:16px;font-size:15px;line-height:1.45}.bubble p{margin:0 0 6px}.bubble p:last-child{margin-bottom:0}.bubble.user{align-self:flex-end;background:var(--teal);color:#fff;border-bottom-right-radius:5px}.bubble.assistant{align-self:flex-start;background:var(--card);border:1px solid var(--line);border-bottom-left-radius:5px}.typing{display:flex;gap:5px}.typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite both}.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}@keyframes blink{0%,80%,to{opacity:.25}40%{opacity:1}}.note{text-align:center;font-size:12.5px;color:var(--accent);padding:4px 12px}.composer{position:sticky;bottom:0;display:flex;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:var(--cream);border-top:1px solid var(--line)}.composer textarea{flex:1;resize:none;max-height:140px;padding:11px 13px;border:1px solid var(--line);border-radius:20px;font-size:15px;background:var(--card)}.composer textarea:focus{outline:none;border-color:var(--teal)}.send{width:44px;border:0;border-radius:50%;background:var(--teal);color:#fff;font-size:17px;flex:0 0 auto}.send:hover{background:var(--teal-dark)}.send:disabled{opacity:.45}