:root{color-scheme:light dark;--bg: #f4f6f9;--card: #ffffff;--text: #1c2330;--muted: #5d6879;--border: #dde2ea;--primary: #1d4e91;--call: #1f9d55;--hangup: #d64545;--hold: #d9a400;--input: #ffffff;--log: #f7f8fa}@media(prefers-color-scheme:dark){:root{--bg: #11151c;--card: #1a2029;--text: #e6ebf2;--muted: #9aa5b5;--border: #2b3340;--primary: #4f86d1;--input: #121820;--log: #141a22}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,Hiragino Sans,PingFang SC,Segoe UI,sans-serif}.app{max-width:560px;margin:0 auto;padding:24px 16px 48px;display:grid;gap:16px}.app-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}h1{font-size:22px;margin:0}h2{font-size:15px;margin:0 0 10px}.subtitle,.hint{color:var(--muted);margin:4px 0 0;font-size:13px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}.row{display:flex;gap:8px}.row>input{flex:1;min-width:0}.field{display:grid;gap:4px;margin-bottom:12px;font-size:13px;color:var(--muted)}input,select{font:inherit;color:var(--text);background:var(--input);border:1px solid var(--border);border-radius:8px;padding:9px 11px;width:100%}.btn{font:inherit;font-weight:600;border:0;border-radius:8px;padding:10px 18px;color:#fff;cursor:pointer;white-space:nowrap}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--primary)}.btn-call{background:var(--call);width:100%}.btn-hangup{background:var(--hangup);flex:1}.btn-hold{background:var(--hold);color:#1c1c1c;flex:1}.btn-hold.active{outline:2px solid var(--text)}.pill{font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;white-space:nowrap}.pill-idle{background:var(--border);color:var(--muted)}.pill-connecting{background:#fdf3cf;color:#7a5b00}.pill-ready{background:#d8f3e3;color:#12643a}.pill-error{background:#fbdcdc;color:#8f2020}.call-status{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px}#call-state{font-weight:600}.timer{font-variant-numeric:tabular-nums;font-size:22px}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}.key{font:inherit;font-size:20px;padding:12px 0;border-radius:10px;border:1px solid var(--border);background:var(--input);color:var(--text);cursor:pointer}.key:disabled{opacity:.4;cursor:not-allowed}.key:not(:disabled):active{background:var(--border)}.actions{margin-top:4px}.log{margin:0;padding:8px 8px 8px 28px;background:var(--log);border-radius:8px;max-height:220px;overflow-y:auto;font:12px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace}.log li.error{color:var(--hangup)}