:root{color-scheme:dark;--bg: #0a1210;--panel: #12211d;--panel-alt: #172a25;--ink: #f3ede2;--muted: #9eb1aa;--line: rgba(255, 255, 255, .09);--accent: #d0e35b;--accent-ink: #11221d;--error: #8f342f}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,sans-serif;color:var(--ink);background:radial-gradient(circle at top left,rgba(208,227,91,.12),transparent 18%),radial-gradient(circle at bottom right,rgba(33,95,79,.28),transparent 24%),var(--bg)}button,input,textarea{font:inherit}button{cursor:pointer}#root{min-height:100vh}.shell{display:grid;grid-template-columns:320px minmax(0,1fr);gap:20px;min-height:100vh;padding:20px}.panel{border:1px solid var(--line);border-radius:24px;background:#12211ddb;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.panel-sidebar{display:grid;align-content:start;gap:18px;padding:22px}.auth-panel,.pairing-panel,.chat-panel{display:grid;gap:18px;padding:24px}.eyebrow{margin:0 0 12px;color:var(--accent);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1}h1{font-size:2.2rem}h2{font-size:1.7rem}h3{font-size:1.2rem}.muted,.pair-card p,.status-box,.field span{color:var(--muted)}.tabs{display:flex;gap:10px}.tab,.primary,.secondary{min-height:46px;border-radius:14px;border:1px solid var(--line);padding:0 16px}.tab,.secondary{background:transparent;color:var(--ink)}.tab.active,.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent;font-weight:700}.field{display:grid;gap:8px}.field input,.field textarea,.composer textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#ffffff08;color:var(--ink);padding:12px 14px}.status-box,.pair-card,.message-list,.code-box{border:1px solid var(--line);border-radius:18px;background:#ffffff08}.status-box,.pair-card{padding:16px}.pair-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.pair-card{display:grid;gap:14px}.code-box{padding:14px;font-size:1.35rem;font-weight:700;letter-spacing:.08em}.chat-header{display:flex;justify-content:space-between;gap:16px;align-items:start}.chat-actions{display:flex;gap:10px}.message-list{display:grid;gap:12px;align-content:start;min-height:420px;max-height:62vh;overflow:auto;padding:16px}.bubble{max-width:min(70%,520px);padding:14px;border-radius:18px;border:1px solid var(--line)}.bubble-mine{margin-left:auto;background:#214239}.bubble-peer{margin-right:auto;background:#172925}.bubble-meta{display:flex;gap:10px;margin-top:10px;font-size:.82rem;color:var(--muted)}.composer{display:grid;gap:12px}.composer-actions{display:flex;gap:12px}.composer textarea{min-height:110px;resize:vertical}.hidden-input{display:none}.image-message img{display:block;max-width:min(100%,320px);max-height:320px;border-radius:12px}.image-download{display:inline-flex;align-items:center;justify-content:center;margin-top:10px;text-decoration:none}.error-banner{position:fixed;left:20px;right:20px;bottom:20px;padding:14px 16px;border-radius:16px;background:var(--error)}@media(max-width:900px){.shell,.pair-grid{grid-template-columns:1fr}.chat-header{flex-direction:column}}