:root{--ink:#202525;--muted:#68706f;--paper:#fbf7f8;--card:#fffefb;--line:#dedfd8;--coral:#e46f51;--coral-dark:#b9442c;--sage:#dbe4da;--teal:#315b57;--shadow:0 24px 70px #26302d1a}*{box-sizing:border-box}html{background:var(--paper)}body{color:var(--ink);background:var(--paper);margin:0;font-family:Yu Gothic UI,Hiragino Sans,system-ui,sans-serif}button,textarea,input,select{font:inherit}a{color:inherit}.chat-shell{width:min(1180px,100% - 40px);min-height:100vh;margin:0 auto}.brand-header{justify-content:space-between;align-items:center;height:88px;display:flex}.brand{align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-mark,.avatar{background:var(--teal);color:#fff;place-items:center;font-family:Georgia,serif;font-weight:700;display:grid}.brand-mark{border-radius:50% 50% 44% 56%;width:42px;height:42px;font-size:24px;transform:rotate(-5deg)}.brand strong{letter-spacing:.02em;font-family:Georgia,Yu Mincho,serif;font-size:24px;display:block}.brand 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label{flex-direction:column;gap:5px;font-size:13px;font-weight:700;display:flex}.settings-form label.check{flex-direction:row;align-items:center;gap:8px}.settings-form input,.settings-form textarea,.settings-form select{font-weight:400}.settings-form .form-message.ok{color:#3c6b52}.settings-form .form-message.error{color:#b9442c}