*{box-sizing:border-box}body{margin:0;background:#eef4f6;color:#122f3b;font:15px/1.5 system-ui,Arial,sans-serif}header{height:74px;position:sticky;top:0;z-index:10;background:#083e42;color:white;display:flex;justify-content:space-between;align-items:center;padding:0 max(20px,calc((100vw - 1130px)/2));box-shadow:0 2px 16px #1233}.brand{display:flex;align-items:center;gap:12px}.brand b{display:block;font-size:20px;line-height:1.1}.brand small{font-size:11px;color:#bee5df}.logo{display:grid;place-items:center;border-radius:14px;background:#ffca46;color:#104144;font-size:30px;width:48px;height:48px}.nav{background:#176369;color:white;border:1px solid #579395;padding:9px 17px;border-radius:9px;cursor:pointer}nav{position:absolute;top:66px;right:max(16px,calc((100vw - 1130px)/2));background:white;color:#14343e;border-radius:12px;box-shadow:0 10px 28px #1233;overflow:hidden;min-width:220px}nav button{display:block;width:100%;text-align:left;background:none;border:0;padding:13px 18px;cursor:pointer;color:inherit}nav button:hover{background:#edf6f6}main{max-width:1130px;margin:35px auto 65px;padding:0 18px;min-height:calc(100vh - 196px)}h1{font-size:23px;margin:0 0 8px}h2{font-size:20px;margin:32px 0 16px}h3{font-size:18px;margin:0 0 10px}.card{background:white;border:1px solid #dbe8e9;border-radius:16px;padding:24px;box-shadow:0 8px 30px #154c5210}.login{max-width:430px;margin:65px auto}.login p,.muted{color:#69818a;font-size:13px}label{display:block;font-weight:600;margin:14px 0 0}input:not([type=checkbox]),select{display:block;width:100%;background:#f8fbfc;border:1px solid #cbdcdf;border-radius:9px;padding:11px;margin-top:7px;color:#153943;font:inherit}input:focus,select:focus{outline:2px solid #1f8b85}.check{display:flex;align-items:center;gap:8px;font-weight:400}.primary{background:#087f79;color:white;border:0;border-radius:9px;padding:12px 18px;cursor:pointer;font-weight:700;margin-top:16px}.primary:hover{background:#066964}.intro{display:flex;justify-content:space-between;align-items:center;gap:14px}.chip{border-radius:30px;padding:7px 12px;background:#fbe9d8;color:#9c5722;font-size:12px}.chip.online{background:#d7f4e7;color:#16704d}.sensors{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:22px}.metric{min-height:178px}.metric .emoji{font-size:23px}.metric p{color:#66818a;margin:8px 0}.metric strong{font-size:37px;display:block;letter-spacing:-1px}.metric small{color:#7d969f}.controls{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.device{display:flex;justify-content:space-between;align-items:center;gap:12px}.device p{font-size:13px;color:#69818a;margin:0}.device button{padding:10px 15px;border:0;border-radius:10px;font-weight:700;cursor:pointer;background:#d9f5e8;color:#08714a;min-width:90px}.device button.off{background:#fce2e2;color:#b52e37}.device button:disabled{opacity:.5;cursor:not-allowed}.tablewrap{overflow:auto;padding:10px 20px}table{width:100%;border-collapse:collapse;white-space:nowrap}th,td{text-align:left;padding:13px;border-bottom:1px solid #e4eff1}th{font-size:12px;color:#677d86}.adminGrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.adminGrid article{align-self:start}td button{margin-right:5px;padding:5px 10px;cursor:pointer}footer{text-align:center;padding:20px;font-size:13px;color:#70828b}.zalo{position:fixed;bottom:20px;right:18px;text-decoration:none;color:#fff;background:#077bdf;padding:10px 16px;border-radius:40px;box-shadow:0 6px 16px #03579b55;font-size:12px;text-align:center;z-index:20}#toast{position:fixed;bottom:88px;left:50%;transform:translateX(-50%);background:#183f47;color:white;padding:10px 16px;border-radius:8px;display:none;max-width:92vw}#toast.show{display:block}@media(max-width:850px){.sensors{grid-template-columns:repeat(2,1fr)}.controls{grid-template-columns:1fr}.adminGrid{grid-template-columns:1fr}}@media(max-width:480px){header{padding:0 14px;height:68px}.brand b{font-size:17px}.brand small{font-size:10px}.logo{width:42px;height:42px}main{margin-top:20px}.sensors{gap:10px}.card{padding:17px}.metric strong{font-size:30px}.metric{min-height:157px}.zalo{bottom:12px;right:10px}.login{margin:36px auto}}
fieldset{border:1px solid #b4cfcd;border-radius:12px;padding:12px;margin:10px 0}fieldset legend{font-weight:700}.rangeInputs{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:580px){.rangeInputs{grid-template-columns:1fr}}

/* v3.0: công tắc gạt phản ánh trạng thái ESP32 đã xác nhận, không cập nhật lạc quan */
.device .toggleSwitch{display:inline-flex;flex-direction:column;align-items:center;gap:6px;min-width:86px;border:0;background:transparent!important;color:#697985!important;padding:6px;cursor:pointer;flex-shrink:0}
.device .toggleSwitch .toggleTrack{position:relative;display:block;width:66px;height:36px;border-radius:40px;background:#bfc7cb;box-shadow:inset 0 1px 3px #17333c24;transition:background .2s ease}
.device .toggleSwitch .toggleThumb{position:absolute;left:4px;top:4px;width:28px;height:28px;border-radius:50%;background:white;box-shadow:0 2px 6px #001b2240;transition:transform .2s ease}
.device .toggleSwitch.is-on .toggleTrack{background:#22b660}
.device .toggleSwitch.is-on .toggleThumb{transform:translateX(30px)}
.device .toggleSwitch.is-on .toggleState{color:#0b8941}
.device .toggleSwitch .toggleState{font-size:12px;font-weight:800;letter-spacing:.3px}
.device .toggleSwitch:focus-visible{outline:3px solid #0b8b7d;outline-offset:2px}
.device .toggleSwitch:disabled{opacity:.45;cursor:not-allowed}
@media(prefers-reduced-motion:reduce){.device .toggleSwitch .toggleThumb,.device .toggleSwitch .toggleTrack{transition:none}}

/* v4.0: Logo chinh thuc Bể Bắc Hà */
.brand img.logo{display:block;object-fit:contain;flex:none;border-radius:12px;background:transparent;color:inherit;font-size:inherit;padding:0;box-shadow:none}

/* v4: click logo + ten website de ve trang chu */
a.brand{color:inherit;text-decoration:none;cursor:pointer}a.brand:hover{opacity:.92}a.brand:focus-visible{outline:3px solid #ffca46;outline-offset:4px;border-radius:8px}

.fishStats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px}.fishStats>div{padding:14px;border-radius:12px;background:#f0f7f5}.fishStats strong{font-size:1.5rem}.fishStats p{margin:6px 0}