:root{color-scheme:dark;--bg:#0d1117;--panel:#171e28;--panel2:#1d2632;--line:#2c3948;--text:#edf4fa;--muted:#8fa0b2;--cyan:#16d9f5;--green:#39d98a;--red:#ff6675}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 0,#173548 0,#0d1117 42%);font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--text);min-height:100vh}.shell{max-width:1180px;margin:auto;padding:28px 20px}.panel{background:rgba(23,30,40,.94);border:1px solid var(--line);border-radius:16px;box-shadow:0 15px 50px #0006}.auth-panel{max-width:420px;margin:8vh auto;padding:30px}.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700}.brand-mark{color:var(--cyan);font-size:28px}.muted{color:var(--muted)}.tabs{display:flex;gap:22px;border-bottom:1px solid var(--line);margin:26px 0 20px}.tab{border:0;background:none;color:var(--muted);padding:10px 0;cursor:pointer;font-size:15px}.tab.active{color:var(--cyan);border-bottom:2px solid var(--cyan)}.form{display:grid;gap:14px}.form label{display:grid;gap:7px;color:var(--muted);font-size:14px}.form input,.form select{width:100%;border:1px solid var(--line);border-radius:9px;background:#0e141c;color:var(--text);padding:12px;font-size:15px}.primary,.ghost{border:1px solid transparent;border-radius:9px;padding:11px 16px;cursor:pointer;font-weight:600}.primary{background:#087d75;color:#fff}.primary:hover{background:#09998e}.ghost{background:transparent;border-color:var(--line);color:var(--text);margin-left:12px}.message{min-height:22px;color:var(--red);font-size:14px}.message.ok{color:var(--green)}.hidden{display:none!important}.topbar{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:0 0 18px}.content{padding-top:30px}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.page-head h1{margin:0 0 6px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}.aquarium-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;cursor:pointer}.aquarium-card:hover{border-color:var(--cyan)}.aquarium-card h3{margin:0 0 8px}.metric{font-size:28px;color:var(--cyan);font-weight:700}.detail{margin-top:24px;padding:22px}.detail-head{display:flex;justify-content:space-between;align-items:flex-start}.device-row,.reading-row{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:12px 0}.status-online{color:var(--green)}.status-offline{color:var(--muted)}.modal{position:fixed;inset:0;background:#0009;display:grid;place-items:center;padding:20px}.modal-card{position:relative;width:min(100%,470px);padding:26px;background:var(--panel);border:1px solid var(--line);border-radius:16px}.close{position:absolute;right:15px;top:10px;background:none;border:0;color:var(--muted);font-size:28px;cursor:pointer}.modal-card h2{margin-top:0}.modal-card form{margin-top:18px}.code{font-size:32px;letter-spacing:7px;text-align:center;color:var(--cyan);padding:15px;background:#0e141c;border-radius:10px}.hint{font-size:13px;color:var(--muted)}@media(max-width:650px){.shell{padding:18px 12px}.page-head{display:grid;gap:14px}.topbar{align-items:flex-start;gap:10px}.topbar>div:last-child{display:grid;gap:8px;text-align:right}.ghost{margin-left:0}}