.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:#000;border-bottom:1px solid var(--border)}.brand{display:flex;flex-direction:column;gap:.1rem}.brand-title{font-weight:600;letter-spacing:.08em;text-transform:uppercase}.brand-sub{font-size:.75rem;text-transform:uppercase;color:var(--muted)}.nav{display:flex;gap:.75rem}.nav a{padding:.4rem .9rem;border-radius:6px;border:1px solid transparent;color:var(--muted);font-weight:500}.nav a.active{color:var(--ink);border-color:var(--ink);background:#0f0f0f}.app-main{flex:1;padding:1.5rem;display:flex;justify-content:center}.app-main>*{width:min(960px,100%)}.hero{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 120px)}.hero-card{background:#000;padding:2rem;border-radius:12px;border:1px solid var(--border);box-shadow:none;max-width:480px}.hero-card h1{margin-top:0}.form{margin-top:1.5rem;display:grid;gap:1rem}.form label{display:grid;gap:.5rem;font-weight:500}.chat-layout{display:flex;flex-direction:column;gap:1.2rem}.message-list{display:flex;flex-direction:column;gap:.7rem;padding:0;min-height:45vh}.empty{color:var(--muted);text-align:center;padding:2rem 0}.message-row{display:grid;grid-template-columns:auto 1fr;align-items:flex-start;gap:.6rem;font-size:.95rem;line-height:1.5}.message-row.expiring{animation:fadePulse 1.2s ease-in-out infinite}.message-line{display:flex;flex-wrap:wrap;gap:.35rem;word-break:break-word}.message-sender{font-weight:600}.message-separator{opacity:.7}.message-text{white-space:pre-wrap}.status-dot{width:10px;height:10px;border-radius:999px;border:1.5px solid var(--ink);margin-top:.35rem;flex:0 0 auto}.status-dot.unread{background:transparent}.status-dot.read{background:#2ecc71;border-color:#2ecc71}.status-dot.warning{background:#f1c40f;border-color:#f1c40f}.status-dot.critical{background:#e74c3c;border-color:#e74c3c}.chat-input{display:grid;gap:.6rem}.chat-input textarea{resize:none;height:56px}.chat-input button{height:56px}.loading-indicator{display:flex;align-items:center;justify-content:center;gap:.6rem;padding:2rem 0;color:var(--muted)}.loader{width:16px;height:16px;border-radius:999px;border:2px solid var(--border);border-top-color:var(--accent);animation:spin .8s linear infinite}.loader-text{font-size:.95rem}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadePulse{0%{opacity:1}50%{opacity:.15}to{opacity:1}}.settings{display:grid;gap:1rem}.card{background:var(--card);padding:1.2rem 1.4rem;border-radius:18px;border:1px solid var(--border);display:grid;gap:.8rem}.card.danger{border-color:#f4b2a7;background:#fff7f6}.form-row{display:grid;gap:.6rem;align-items:center}@media(min-width:720px){.form-row{grid-template-columns:1fr auto}.chat-input{grid-template-columns:1fr auto;align-items:end}.chat-input textarea,.chat-input button{height:48px}}@media(max-width:640px){.app-header{flex-direction:column;gap:.75rem;align-items:flex-start}.message-bubble{max-width:92%}}:root{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;color:#f5f5f5;background-color:#000;text-rendering:optimizeLegibility;--bg: #000;--bg-accent: #000;--ink: #f5f5f5;--muted: #9aa0a6;--card: #0b0b0b;--border: #232323;--accent: #ffffff;--accent-dark: #d6d6d6;--shadow: none}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#000}#root{min-height:100vh}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{border:none;cursor:pointer}textarea{resize:vertical}.muted{color:var(--muted);font-size:.95rem}.alert{background:#120a0a;border:1px solid #5c1d1d;color:#f2b8b5;padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem}button.primary,button.secondary,button.danger{padding:.65rem 1.1rem;border-radius:6px;font-weight:600;transition:transform .2s ease,box-shadow .2s ease}button.primary{background:#fff;color:#000;box-shadow:none}button.primary:hover{transform:translateY(-1px);box-shadow:none}button.secondary{background:#000;border:1px solid var(--border);color:var(--ink)}button.danger{background:#2b0d0d;color:#f2b8b5;border:1px solid #5c1d1d}input,textarea{width:100%;padding:.7rem .85rem;border-radius:6px;border:1px solid var(--border);background:#0b0b0b;color:var(--ink)}input:focus,textarea:focus{outline:2px solid rgba(255,255,255,.35);border-color:#fff9}