:root{color-scheme:light;--bg:#f5f7fa;--surface:#fff;--ink:#182230;--muted:#526173;--faint:#8290a1;--line:#dde5eb;--teal:#176a65;--teal-dark:#0e504d;--teal-soft:#e5f2f0;--red:#b42318;--shadow:0 18px 55px rgba(33,52,67,.09);--radius:18px;--system:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:var(--system);font-size:16px;color:var(--ink);background:var(--bg)}body{line-height:1.45}button,input,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(23,106,101,.3);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.auth-page{display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% -10%,#d9eeeb 0,transparent 42%),var(--bg)}.auth-card{width:min(100%,414px);padding:45px 44px 33px;background:var(--surface);border:1px solid rgba(221,229,235,.8);border-radius:24px;box-shadow:var(--shadow)}.brand-mark,.mini-mark{display:grid;place-items:center;background:var(--teal);color:#fff;font-weight:750;letter-spacing:-.06em}.brand-mark{width:52px;height:52px;border-radius:17px;font-size:25px;box-shadow:0 8px 20px rgba(23,106,101,.22);margin-bottom:28px}.mini-mark{width:31px;height:31px;border-radius:10px;font-size:16px}.eyebrow{margin:0 0 8px;color:var(--teal);font-size:12px;font-weight:750;letter-spacing:.12em;text-transform:uppercase}.auth-card h1{margin:0;font-size:31px;letter-spacing:-.04em}.auth-intro{margin:9px 0 31px;color:var(--muted);font-size:16px}.stack-form{display:grid;gap:18px}.field{display:grid;gap:7px}.field label{font-size:13px;font-weight:650;color:#304154}.field input,.inline-form input,.stack-form input{width:100%;min-height:48px;padding:11px 13px;border:1px solid #cbd6df;border-radius:11px;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}.field input:focus,.inline-form input:focus,.stack-form input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(23,106,101,.1);outline:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:10px 17px;border:1px solid transparent;border-radius:11px;font-weight:700;transition:background .15s,transform .15s,box-shadow .15s}.button:hover{transform:translateY(-1px)}.button:active{transform:translateY(0)}.button.primary{background:var(--teal);color:#fff;box-shadow:0 5px 13px rgba(23,106,101,.18)}.button.primary:hover{background:var(--teal-dark)}.button.secondary{background:#fff;border-color:#cbd7df;color:var(--teal)}.button.secondary:hover{background:var(--teal-soft)}.button.wide{width:100%;min-height:49px}.button.small{min-height:38px;padding:7px 12px;font-size:13px}.form-message{margin:0;font-size:13px}.error-message{padding:10px 12px;border-radius:9px;background:#fff0ef;color:var(--red)}.success-message{color:var(--teal)}.auth-footnote{display:flex;align-items:center;justify-content:center;gap:7px;margin:28px 0 0;color:var(--faint);font-size:12px}.lock-icon{font-size:19px;color:var(--teal)}.chat-page{background:radial-gradient(circle at 12% 0,#e6f4f1 0,transparent 29%),var(--bg)}.app-shell{width:min(100% - 36px,900px);margin:0 auto;padding:27px 0 42px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:19px}.wordmark{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:18px;font-weight:750;letter-spacing:-.02em}.topbar-actions{display:flex;align-items:center;gap:10px}.connection-pill{display:inline-flex;align-items:center;gap:7px;padding:7px 11px;border:1px solid var(--line);border-radius:99px;background:rgba(255,255,255,.68);color:var(--muted);font-size:12px;font-weight:650}.status-dot{width:7px;height:7px;border-radius:50%;background:#d39b31;box-shadow:0 0 0 3px rgba(211,155,49,.13)}.connection-pill.connected .status-dot{background:#2b936d;box-shadow:0 0 0 3px rgba(43,147,109,.13)}.connection-pill.lost .status-dot{background:#b3bfca;box-shadow:0 0 0 3px rgba(179,191,202,.18)}.icon-button{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--muted);font-size:20px}.icon-button:hover{color:var(--teal);background:var(--teal-soft)}.demo-banner{display:flex;align-items:center;gap:10px;margin-bottom:13px;padding:10px 14px;border:1px solid #efd9aa;border-radius:12px;background:#fffbf1;color:#765b26;font-size:13px}.demo-badge{padding:3px 7px;border-radius:5px;background:#f1cc72;color:#684c14;font-size:10px;font-weight:800;letter-spacing:.08em}.text-button{padding:4px 0;border:0;background:none;color:var(--teal);font-size:13px;font-weight:700;text-decoration:underline;text-underline-offset:3px}.demo-banner .text-button{margin-left:auto}.text-button:hover{color:var(--teal-dark)}.text-button.danger{color:var(--red)}.chat-card{overflow:hidden;display:flex;flex-direction:column;height:min(715px,calc(100vh - 138px));min-height:550px;border:1px solid rgba(221,229,235,.8);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.chat-heading{display:flex;align-items:center;gap:12px;padding:17px 22px;border-bottom:1px solid #edf1f4}.avatar{display:grid;place-items:center;width:41px;height:41px;flex:0 0 auto;border-radius:13px;font-size:15px;font-weight:800}.parent-avatar{background:var(--teal-soft);color:var(--teal)}.chat-heading h1{margin:0;font-size:17px;letter-spacing:-.02em}.chat-heading p{margin:1px 0 0;color:var(--muted);font-size:12px}.quiet-status{margin-left:auto;color:var(--faint);font-size:12px}.message-list{position:relative;flex:1;overflow:auto;padding:25px 25px 18px;scroll-behavior:smooth}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;max-width:300px;margin:auto;text-align:center}.empty-icon{display:grid;place-items:center;width:54px;height:54px;margin-bottom:16px;border-radius:18px;background:var(--teal-soft);color:var(--teal);font-size:24px}.empty-state h2{margin:0;font-size:19px;letter-spacing:-.02em}.empty-state p{margin:8px 0 0;color:var(--muted);font-size:14px}.date-divider{width:max-content;margin:2px auto 20px;padding:4px 10px;border-radius:99px;background:#f0f4f5;color:var(--faint);font-size:11px;font-weight:650}.message-row{display:flex;margin:0 0 14px;animation:rise .2s ease-out}.message-row.parent{justify-content:flex-start}.message-row.child{justify-content:flex-end}.message-wrap{max-width:min(77%,560px)}.bubble{padding:11px 14px;border-radius:16px 16px 16px 4px;background:#f1f4f6;color:var(--ink);white-space:pre-wrap;overflow-wrap:anywhere}.child .bubble{border-radius:16px 16px 4px 16px;background:var(--teal);color:#fff}.message-meta{display:flex;align-items:center;gap:7px;margin-top:4px;color:var(--faint);font-size:11px}.child .message-meta{justify-content:flex-end}.delivery-status{font-weight:600}.delivery-status.failed{color:var(--red)}.delivery-status.unknown{color:#a56b14}.retry-button{padding:0;border:0;background:none;color:var(--red);font:inherit;text-decoration:underline}.new-messages{position:relative;z-index:2;height:0}.new-messages button{position:absolute;top:10px;right:20px;padding:7px 12px;border:1px solid #aad4d0;border-radius:99px;background:#fff;color:var(--teal);font-size:12px;font-weight:700;box-shadow:0 5px 15px rgba(23,106,101,.12)}.composer{padding:14px 18px 17px;border-top:1px solid #edf1f4;background:#fcfdfd}.composer textarea{display:block;width:100%;min-height:47px;max-height:140px;padding:12px 13px;resize:none;border:1px solid #cbd6df;border-radius:12px;color:var(--ink);line-height:1.4}.composer textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(23,106,101,.1);outline:0}.composer-footer{display:flex;align-items:center;gap:10px;margin-top:9px}.shortcut-hint,.character-count{color:var(--faint);font-size:11px}.character-count{margin-left:auto}.send-button{min-height:37px;padding:7px 14px;font-size:13px}.send-button[disabled]{opacity:.55;cursor:wait;transform:none}.privacy-note{display:flex;align-items:center;justify-content:center;gap:7px;margin:15px 0 0;color:var(--faint);font-size:12px}.privacy-note span{color:var(--teal)}.demo-panel{margin-top:14px;padding:18px 20px;border:1px solid #e4d7b9;border-radius:16px;background:#fffdf8;box-shadow:0 8px 24px rgba(55,47,28,.05)}.panel-heading,.dialog-heading{display:flex;justify-content:space-between;align-items:flex-start}.panel-heading h2,.dialog-heading h2{margin:0;font-size:20px;letter-spacing:-.03em}.panel-heading .icon-button,.dialog-heading .icon-button{width:34px;height:34px;font-size:22px;border:0;background:transparent}.panel-help{margin:7px 0 15px;color:var(--muted);font-size:13px}.inline-form{display:flex;gap:8px}.inline-form input{min-height:42px}.fault-row{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin-top:14px;color:var(--muted);font-size:12px}.chip{padding:6px 10px;border:1px solid #d9d0bb;border-radius:99px;background:#fff;color:#6b582d;font-size:11px}.chip:hover,.chip.active{border-color:#c4994b;background:#fff4d9}.demo-outbox{margin-top:12px;color:var(--muted);font-size:12px}.outbox-item{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-top:1px solid #eee6d6}.settings-dialog{width:min(100% - 28px,500px);padding:25px;border:0;border-radius:20px;box-shadow:0 24px 80px rgba(24,34,48,.2);color:var(--ink)}.settings-dialog::backdrop{background:rgba(24,34,48,.36);backdrop-filter:blur(2px)}.settings-section{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:13px;padding:19px 0;border-bottom:1px solid #edf1f4}.setting-copy h3{margin:0;font-size:14px}.setting-copy p{margin:3px 0 0;color:var(--muted);font-size:12px}.toggle-button{display:inline-flex;align-items:center;gap:7px;padding:3px 8px 3px 4px;border:1px solid #ccd7dd;border-radius:99px;background:#f1f4f5;color:var(--muted);font-size:11px;font-weight:700}.toggle-button span{width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.15);transition:transform .15s}.toggle-button.on{background:var(--teal-soft);border-color:#9bceca;color:var(--teal)}.toggle-button.on span{transform:translateX(28px);background:var(--teal)}.toggle-button.on b{order:-1}.stacked-setting{grid-template-columns:1fr auto}.stack-form.compact{grid-column:1/-1;gap:10px;margin-top:7px}.stack-form.compact input{min-height:42px}.dialog-footer{display:flex;align-items:center;justify-content:space-between;padding-top:19px;color:var(--faint);font-size:12px}.signed-in-as strong{color:var(--ink)}.toast-region{position:fixed;right:20px;bottom:20px;z-index:20;display:grid;gap:8px;max-width:min(360px,calc(100% - 40px))}.toast{padding:11px 14px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);font-size:13px;box-shadow:0 10px 25px rgba(24,34,48,.12)}.toast.error{border-color:#edc3bf;color:var(--red)}[hidden]{display:none!important}@keyframes rise{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.app-shell{width:100%;padding:14px 12px 24px}.topbar{margin-bottom:13px}.chat-card{height:calc(100vh - 94px);min-height:480px;border-radius:15px}.chat-heading{padding:13px 15px}.message-list{padding:18px 13px 12px}.composer{padding:11px 11px 13px}.message-wrap{max-width:88%}.shortcut-hint{display:none}.auth-card{padding:34px 25px 28px}.settings-section{grid-template-columns:1fr auto}.settings-section .button.small{grid-column:2}.settings-section .toggle-button{grid-column:2}.inline-form{flex-direction:column}.demo-banner{align-items:flex-start;flex-wrap:wrap}.demo-banner .text-button{margin-left:0}.quiet-status{display:none}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}