:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f5f7f4;color:#17201e;font-size:16px;letter-spacing:0}*{box-sizing:border-box}body{margin:0;min-width:320px;width:100%;height:100vh;height:100dvh;overflow:hidden;background:#f5f7f4}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{height:100vh;height:100dvh;overflow:hidden;display:grid;grid-template-columns:248px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;padding:20px;border-right:1px solid #dce4de;background:#fff}.brand{display:flex;align-items:center;gap:12px;margin-bottom:28px}.brand-mark{width:42px;height:42px;border-radius:8px;display:grid;place-items:center;background:#1f6f68;color:#fff;font-weight:800}.brand span,.muted,.eyebrow,.message span,.letter span,.wakeup span{color:#64716c}.brand span,.eyebrow,.message span,.letter span,.wakeup span{display:block;font-size:.82rem}.eyebrow{margin:0 0 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img,.message-attachments img{max-width:min(360px,100%);max-height:260px;border-radius:8px;border:1px solid #dce4de;object-fit:contain;background:#f5f7f4}.attachment-preview audio,.message-attachments audio{width:min(360px,100%)}.message-attachments{display:grid;gap:8px;margin-top:8px}.attachment-chip{display:inline-flex;width:fit-content;padding:5px 8px;border-radius:999px;border:1px solid #d8e1db;color:#3d4b46;background:#fff;font-size:.84rem}.message{max-width:72ch;border:1px solid #dce4de;border-radius:8px;padding:10px 12px;margin-bottom:10px;background:#fbfcfb}.message.user{margin-left:auto;border-color:#b8d6cc;background:#eef8f5}.message.pending{opacity:.72}.message small{display:block;margin-top:8px;color:#64716c}.message p,.letter p,.wakeup p{white-space:pre-wrap;margin-bottom:0}.split{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:14px}.split.one-column{grid-template-columns:minmax(0,1fr)}.letter,.wakeup{border-top:1px solid #e6ece8;padding:12px 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