:root{--bg: #f5f7fa;--panel: #ffffff;--text: #1c2330;--text-muted: #5b6473;--primary: #1f7ae0;--primary-hover: #1762b8;--danger: #c0392b;--border: #e3e7ee;--shadow: 0 10px 30px rgba(20, 30, 50, .08);--radius: 14px}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Helvetica Neue,sans-serif;line-height:1.5}.app{max-width:560px;margin:0 auto;padding:48px 20px;display:flex;flex-direction:column;gap:24px}.app__header h1{margin:0;font-size:28px;letter-spacing:-.01em}.app__subtitle{margin:4px 0 0;color:var(--text-muted);font-size:14px}.app__panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:16px;align-items:stretch}.status{margin:0;color:var(--text-muted);font-size:14px;text-align:center}.status--active{color:var(--primary);font-weight:600}.status--error{color:var(--danger);font-weight:600}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;border-radius:10px;padding:14px 18px;font-size:16px;font-weight:600;cursor:pointer;transition:background .12s ease,transform 60ms ease}.btn:active{transform:translateY(1px)}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-hover)}.btn--secondary{background:transparent;color:var(--danger);border:1px solid var(--danger)}.btn--secondary:hover{background:#c0392b14}.transcript{margin-top:8px;border-top:1px solid var(--border);padding-top:16px}.transcript__title{margin:0 0 8px;font-size:13px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.transcript__list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;max-height:280px;overflow-y:auto}.transcript__list li{font-size:14px;padding:8px 12px;border-radius:8px;background:var(--bg)}.transcript__list li.user{background:#e7f1fc;align-self:flex-end;max-width:85%}.transcript__list li.agent{background:#f1f3f7;align-self:flex-start;max-width:85%}.app__footer{text-align:center;color:var(--text-muted);font-size:12px}