:root{--color-brand:#ec660d;--color-brand-dark:#c9550b;--color-brand-light:#f28a4b;--color-bg:#f4f5f7;--color-surface:#fff;--color-border:#e2e4e8;--color-border-focus:#ec660d;--color-text:#1a1d23;--color-text-secondary:#5a6072;--color-text-disabled:#b0b7c3;--color-text-inverse:#fff;--color-status-connected:#22c55e;--header-height:64px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 12px #0000001a;--font-family:"Inter", system-ui, -apple-system, sans-serif;--font-size-xs:11px;--font-size-sm:13px;--font-size-base:14px;--font-size-md:15px;--font-size-lg:17px;--font-size-xl:20px;--transition:.15s ease;--content-width:760px;font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{background:var(--color-bg);min-width:320px;margin:0}button,textarea{font:inherit}button:focus-visible,textarea:focus-visible{outline:2px solid var(--color-brand);outline-offset:2px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.app-shell{flex-direction:column;height:100vh;display:flex}.app-header{flex:0 0 var(--header-height);height:var(--header-height);background:var(--color-brand);color:#fff;padding:env(safe-area-inset-top) 24px 0;align-items:center;display:flex}.app-header__inner{justify-content:space-between;align-items:center;width:100%;height:100%;display:flex}.app-header__brand{align-items:center;gap:var(--space-3);width:-moz-fit-content;width:fit-content;min-width:0;height:100%;margin:0;padding:0;display:inline-flex}.app-header__actions{align-items:center;gap:var(--space-2);display:flex}.app-header__logo{height:calc(var(--header-height) - 24px);filter:brightness(0)invert();flex-shrink:0;width:auto;max-width:100%}.app-header__title{box-sizing:border-box;font-family:var(--font-family);font-size:var(--font-size-lg);color:var(--color-text-inverse);white-space:nowrap;-webkit-font-smoothing:antialiased;margin:0;padding:0;font-weight:700;line-height:1}.btn--restart{color:var(--color-brand)}.button{color:var(--color-brand);cursor:pointer;background:#fff;border:0;border-radius:20px;padding:8px 16px;font-size:14px}.button:hover{background:#fff4ed}.button:disabled{opacity:.6;cursor:not-allowed}.status-bar{background:var(--color-surface);border-bottom:1px solid var(--color-border);color:var(--color-text-secondary);flex:none;align-items:center;gap:8px;padding:6px 24px;font-size:13px;display:flex}.status-bar--connected{color:var(--color-status-connected)}.status-dot{background:#9aa3ad;border-radius:50%;width:8px;height:8px}.status-dot--connected{background:var(--color-status-connected)}.app-loading{flex:1;place-items:center;display:grid}.auth-prompt{flex:1;place-items:center;padding:24px;display:grid}.auth-prompt__content{text-align:center;width:min(100%,420px)}.auth-prompt__content h2{font-size:var(--font-size-xl);margin:0 0 8px}.auth-prompt__content p{color:var(--color-text-secondary);margin:0 0 24px;line-height:1.5}.auth-prompt__content .button{border-radius:var(--radius-sm);background:var(--color-brand);color:#fff}.auth-prompt__content .button:hover:not(:disabled){background:var(--color-brand-dark)}.app-main,.app-chat{flex:1;min-height:0;display:flex}.chat-area{flex-direction:column;flex:1;width:100%;min-height:0;display:flex}.chat-messages{flex:1;padding:24px 24px 16px;overflow-y:auto}.chat-row{max-width:var(--content-width);gap:12px;margin:0 0 16px;display:flex}.chat-row--user{justify-content:flex-end;margin-left:auto}.chat-avatar{object-fit:cover;border-radius:50%;flex:0 0 36px;width:36px;height:36px}.chat-bubble{overflow-wrap:anywhere;border-radius:12px;min-width:0;max-width:85%;padding:12px 16px;font-size:15px;line-height:1.5}.chat-bubble--assistant{background:var(--color-surface);border:1px solid var(--color-border);box-shadow:0 1px 2px #0000000d}.chat-bubble--user{background:var(--color-brand);color:#fff}.chat-bubble--user a{color:#fff}.chat-bubble__author{color:var(--color-text-secondary);margin-bottom:4px;font-size:13px;display:block}.chat-bubble__content>:first-child{margin-top:0}.chat-bubble__content>:last-child{margin-bottom:0}.chat-bubble__time{color:#a3aab2;text-align:right;margin-top:6px;font-size:12px;display:block}.chat-bubble--user .chat-bubble__time{color:#ffe1cc}.adaptive-card{color:var(--color-text);background:#fff;border:1px solid #e0e2e5;border-radius:6px;margin-top:8px;overflow:hidden}.adaptive-card:first-child{margin-top:0}.adaptive-card--disabled{opacity:.65;pointer-events:none}.adaptive-card__fallback{color:#69727d;margin:0;font-style:italic}.typing-indicator{max-width:var(--content-width);color:var(--color-text-secondary);align-items:center;gap:12px;margin:0 0 16px;font-size:14px;display:flex}.typing-dots{gap:4px;display:inline-flex}.typing-dots span{background:var(--color-brand);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite bounce}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}.chat-input-row{background:var(--color-surface);border-top:1px solid var(--color-border);padding:12px 24px calc(12px + env(safe-area-inset-bottom));flex:none}.chat-input-row__inner{align-items:flex-end;gap:12px;width:100%;display:flex}.chat-input{resize:none;border:1px solid #ff9b5d;border-radius:20px;outline:0;flex:1;min-width:0;max-height:127px;padding:10px 16px;font-size:15px;line-height:1.4;overflow-y:hidden}.chat-input:focus-visible{border-color:var(--color-brand);box-shadow:0 0 0 2px var(--color-brand)}.chat-input:disabled{background:#f4f5f7}.send-button{background:var(--color-brand);color:#fff;cursor:pointer;border:0;border-radius:50%;flex:0 0 44px;place-items:center;width:44px;height:44px;display:grid}.send-button:hover:not(:disabled){background:var(--color-brand-dark)}.send-button:disabled{cursor:not-allowed;background:#d4d5d7}.send-button svg{width:20px;height:20px}.alert{max-width:var(--content-width);border-radius:8px;margin:12px 24px;padding:12px 40px 12px 16px;font-size:14px;position:relative}.alert--error{color:#8e2720;background:#fff0ef;border:1px solid #e5aaa5}.alert--info{background:#fff;border:1px solid #dde1e6}.alert__content{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.alert__close{color:currentColor;cursor:pointer;background:0 0;border:0;font-size:20px;position:absolute;top:8px;right:10px}.alert .button{color:inherit;background:0 0;border:1px solid;padding:4px 12px}.spinner{border:2px solid #d8dde2;border-top-color:var(--color-brand);border-radius:50%;width:16px;height:16px;animation:.8s linear infinite spin;display:inline-block}.spinner--sm{width:12px;height:12px}.spinner--lg{border-width:3px;width:32px;height:32px}@keyframes spin{to{transform:rotate(360deg)}}@keyframes bounce{0%,60%,to{opacity:.5;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}@media (max-width:640px){.app-header{padding-left:16px;padding-right:16px}.app-header__logo{height:26px}.status-bar,.chat-messages,.chat-input-row{padding-left:16px;padding-right:16px}.alert{margin-left:16px;margin-right:16px}.chat-bubble{max-width:90%}}