:root{color-scheme:dark;--bg:#031322;--panel:#061c2dee;--text:#e9f5ff;--muted:#a6bfce;--cyan:#3bd3fc;--green:#3de6b2;--red:#ff7b7b;--line:#18435a}*{box-sizing:border-box}body{margin:0;background:linear-gradient(#001528a6,#00111edb),url('/aquarium.png') center top/cover fixed,var(--bg);color:var(--text);font:15px/1.5 'Segoe UI',sans-serif;min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}a{color:inherit;text-decoration:none}header{display:flex;justify-content:space-between;gap:20px;padding:24px 4%;border-bottom:1px solid #ffffff18;background:#001629a6;align-items:center}.brand{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:600;letter-spacing:-.5px}.brand>b,.brand b{color:var(--cyan)}nav{display:flex;gap:10px}button{border:1px solid var(--line);color:var(--text);background:#08263bbf;border-radius:10px;padding:10px 18px}button:hover{border-color:var(--cyan)}main{max-width:1500px;margin:auto;padding:0 28px 35px}.hero{text-align:center;padding:40px 0 25px}.eyebrow{letter-spacing:3px;color:var(--cyan);font-size:11px;font-weight:600}h1{font-size:clamp(28px,3.2vw,47px);letter-spacing:-1.5px;line-height:1.15;margin:12px 0}h1 span{color:var(--cyan)}h2{font-size:19px;margin:0}h3{font-size:15px;margin-top:25px}p{color:var(--muted)}.badge{border:1px solid var(--cyan);border-radius:20px;padding:5px 12px;font-size:11px;color:var(--cyan)}.tanks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.tank{padding:0;overflow:hidden;text-align:left;background:linear-gradient(#062335,#00111f);border:1px solid var(--line);border-radius:17px;box-shadow:0 12px 30px #0004}.tank.selected{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan),0 0 24px #00c9ff20}.tank.high,.tank.low{border-color:var(--red)}.tank-photo{height:180px;background-image:linear-gradient(transparent 65%,#042033),url('/aquarium.png');background-size:auto,220%;background-position:center,20% 65%}.tank:nth-child(2) .tank-photo{background-position:center,85% 75%}.tank:nth-child(3) .tank-photo{background-position:center,95% 65%}.tank:nth-child(4) .tank-photo{background-position:center,50% 80%}.tank-content{padding:15px 18px 20px}.tank-top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}.pill{font-size:11px;border-radius:15px;padding:5px 9px;background:#00d9a518;color:var(--green)}.pill.bad{background:#ff535520;color:var(--red)}.pill.missing{background:#8199aa20;color:var(--muted)}.value{font-size:clamp(30px,3.1vw,46px);font-weight:650;letter-spacing:-1px;margin-top:12px}.value small{font-size:22px;color:var(--muted);font-weight:400}.high .value,.low .value{color:var(--red)}.tank small.meta{display:block;font-size:11px;color:var(--muted);margin-top:6px}.glass{background:var(--panel);border:1px solid var(--line);border-radius:17px;padding:24px;box-shadow:0 18px 35px #0002}.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px;margin-top:22px}.section-head{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}.section-head p{font-size:12px;margin:5px 0}.periods{display:flex;gap:4px;align-items:start}.periods button{font-size:12px;padding:7px 11px;background:transparent;border-color:transparent}.periods .active{border-color:var(--cyan);color:var(--cyan);background:#0877a72b}#point-info{font-size:12px;color:var(--muted);margin-top:15px;min-height:20px}#chart{width:100%;height:265px;display:block}#chart text{font-family:inherit;font-size:11px;fill:var(--muted)}#summary{display:flex;gap:20px;flex-wrap:wrap;font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px}#summary b{color:var(--text);font-weight:500}label{display:block;font-size:12px;color:var(--muted)}input{width:100%;display:block;padding:11px;border:1px solid var(--line);border-radius:8px;background:#021421;color:var(--text);margin:6px 0 16px;min-width:0}.thresholds{display:flex;gap:12px}.thresholds label{width:50%}.primary{background:linear-gradient(115deg,#00a9df,#0868a5);color:white;font-weight:600;border:1px solid #40caff80;box-shadow:0 6px 20px #008bc922}#alarm-summary{padding:15px 0}.alarm-value{font-size:38px;color:var(--red);font-weight:600}.events{margin-top:20px}.event{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px}.event time{color:var(--muted);font-size:12px}.event:last-child{border:0}.event.bad{color:var(--red)}footer{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding:20px 4%;font-size:12px;color:var(--muted);border-top:1px solid #ffffff18}#login-screen{min-height:700px;display:grid;grid-template-columns:1.3fr 1fr;gap:80px;align-items:center;max-width:1100px;margin:auto}#login-form{padding:35px}#login-form label{margin-top:20px}#login-form .primary{width:100%}#login-error,#error{color:var(--red)}[hidden]{display:none!important}@media(max-width:1000px){.detail-grid{grid-template-columns:1fr}.tanks{gap:12px}.tank-content{padding:12px}.tank-photo{height:130px}.tank-top{font-size:12px}.value{font-size:32px}#login-screen{gap:30px}}@media(max-width:650px){main{padding:0 15px 25px}header{padding:18px}.brand{font-size:17px}nav button{padding:8px;font-size:12px}.hero{padding-top:28px}.tanks{grid-template-columns:repeat(2,minmax(0,1fr))}.tank-photo{height:125px}.tank-content{padding:12px}.glass{padding:18px}.value{font-size:30px}.value small{font-size:15px}.detail-grid{gap:15px}.periods{flex-wrap:wrap}#login-screen{grid-template-columns:1fr;gap:20px;padding:30px 0;min-height:0}.welcome{padding:15px}.welcome h1{font-size:33px}#chart{height:240px}footer{font-size:11px}.tank-top{gap:5px}.pill{font-size:10px}}

/* Four square generated aquascapes. Each quadrant is an independent card. */
.tank .tank-photo{height:auto;aspect-ratio:1 / 1;background-image:url('/aquarium-styles.png');background-size:200% 200%;background-repeat:no-repeat;background-position:0% 0%;border-bottom:1px solid var(--line)}
.tank:nth-child(2) .tank-photo{background-position:100% 0%}
.tank:nth-child(3) .tank-photo{background-position:0% 100%}
.tank:nth-child(4) .tank-photo{background-position:100% 100%}
.tank-style{color:var(--cyan);font-size:14px;font-weight:500;margin-top:10px}


/* User-supplied square Dragon Stone photo, other tank images unchanged. */
.tank:nth-child(2) .tank-photo{background-image:url('/dragon-stone-reference.png');background-size:cover;background-position:center}