:root{--bg:#05090f;--panel:#0c1524;--panel2:#101c2e;--line:#1d3148;--cyan:#17d6ff;--green:#42e37b;--red:#ff556a;--yellow:#ffd54a;--text:#eef7ff;--muted:#8ea2b8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}a{color:inherit;text-decoration:none}.app{display:flex;min-height:100vh}.sidebar{width:240px;background:#08111e;border-right:1px solid var(--line);padding:22px 14px;position:fixed;inset:0 auto 0 0;overflow:auto}.brand{font-size:25px;font-weight:800;letter-spacing:.5px;color:var(--cyan);margin:0 10px 26px}.brand small{display:block;color:var(--muted);font-size:11px;font-weight:600;margin-top:4px}.nav a{display:block;padding:12px 14px;border-radius:10px;margin:5px 0;color:#c9d8e7}.nav a:hover{background:var(--panel2);color:#fff}.main{margin-left:240px;width:calc(100% - 240px)}.topbar{height:68px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 26px;background:#07101b;position:sticky;top:0;z-index:5}.content{padding:24px;max-width:1400px;margin:auto}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}.stat b{display:block;font-size:32px;color:var(--cyan)}.muted{color:var(--muted)}.btn{border:0;border-radius:10px;padding:10px 16px;cursor:pointer;font-weight:700;background:var(--cyan);color:#021017}.btn.secondary{background:#1b2b3e;color:#fff}.btn.danger{background:var(--red);color:#fff}.btn.green{background:var(--green)}.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{margin-bottom:14px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;background:#07101b;border:1px solid #263a50;color:#fff;border-radius:9px;padding:11px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:11px 10px;border-bottom:1px solid #1c2b3d;text-align:left;font-size:14px}.table th{color:var(--muted);font-size:12px;text-transform:uppercase}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#15314b;color:#9ceaff;font-size:11px}.badge.ok{background:#123821;color:#7bf1a0}.badge.bad{background:#451a23;color:#ff98a6}.alert{padding:11px 14px;border-radius:9px;margin-bottom:14px;background:#123821;color:#9af4b4}.alert.error{background:#451a23;color:#ffc0c8}.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}.ptt-shell{max-width:620px;margin:auto}.radio-head{display:flex;justify-content:space-between;align-items:center}.status-dot{width:10px;height:10px;border-radius:50%;display:inline-block;background:var(--red);margin-right:7px}.status-dot.on{background:var(--green)}.announcement{background:#161a0d;border:1px solid #47451b;color:#ffec8a;padding:9px 12px;border-radius:10px;margin:14px 0;white-space:nowrap;overflow:hidden}.ptt-display{text-align:center;padding:26px 10px}.ptt-display .title{font-size:36px;color:var(--cyan);font-weight:900;letter-spacing:2px}.speaking{min-height:26px;color:var(--green);font-weight:700}.ptt-button{width:210px;height:120px;border-radius:26px;border:4px solid var(--cyan);background:#02060a;color:var(--cyan);font-size:34px;font-weight:900;cursor:pointer;user-select:none;touch-action:none;box-shadow:0 0 0 0 rgba(23,214,255,.2)}.ptt-button.tx{background:#082a18;border-color:var(--green);color:var(--green);box-shadow:0 0 25px rgba(66,227,123,.28)}.ptt-button.busy{border-color:var(--yellow);color:var(--yellow)}.ptt-button:disabled{opacity:.4;cursor:not-allowed}.channel-list button{width:100%;text-align:left;background:#0a1421;color:#fff;border:1px solid #21354a;border-radius:10px;padding:11px;margin:5px 0;cursor:pointer}.channel-list button.active{border-color:var(--cyan);color:var(--cyan)}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#10253a,#05090f 55%)}.login-card{width:min(420px,92vw);background:#0a1421;border:1px solid #1e344d;border-radius:20px;padding:30px}.login-logo{font-size:34px;color:var(--cyan);font-weight:900;text-align:center;margin-bottom:22px}.hamb{display:none}@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.2s;z-index:20}.sidebar.open{transform:none}.main{margin-left:0;width:100%}.hamb{display:inline-block}.grid{grid-template-columns:repeat(2,1fr)}.split,.form-row{grid-template-columns:1fr}}@media(max-width:520px){.grid{grid-template-columns:1fr}.content{padding:14px}.topbar{padding:0 14px}.ptt-button{width:190px;height:115px}.ptt-display .title{font-size:28px}}