.boiler-main { width: min(1600px, calc(100% - 3rem)); }
.boiler-main .page-intro { max-width: none; }
.boiler-main [hidden] { display: none !important; }
.boiler-playback { display: flex; flex-wrap: wrap; align-items: end; gap: .8rem; margin-bottom: 1.2rem; }
.boiler-playback label { width: 125px; }
.boiler-clock { margin-left: auto; display: grid; }
.boiler-system { margin-block: 1.2rem; }
.boiler-piping { display: grid; grid-template-columns: 1.3fr .8fr 1fr; gap: 1.2rem; align-items: stretch; }
.boiler-loop-title { font-weight: 700; letter-spacing: .06em; font-size: .85rem; margin-bottom: 1rem; }
.boiler-branches { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.boiler-branch { display: flex; flex-direction: column; gap: .5rem; padding: 1rem; border: 1px solid #c7d5df; border-top: 4px solid #be542a; border-radius: 5px; min-width: 0; background: #fff9f4; }
.boiler-branch > strong { font-size: 1.7rem; color: #9a411b; }
.boiler-branch small { font-size: .8rem; }
.boiler-branch .state { font-weight: 700; color: #245c76; }
.boiler-header-line { border-top: 4px solid #bb512d; padding-top: .5rem; margin-block: .8rem; font-size: .85rem; }
.boiler-header-line.return { border-color: #2779a1; }
.llh { display: grid; grid-template-columns: 1fr 65px 1fr; gap: .5rem; align-items: center; height: 250px; margin-top: 1.5rem; }
.llh-port { font-size: .78rem; min-width: 0; border-top: 3px solid #bb512d; padding-top: .4rem; }
.llh-port.cold { border-color: #2779a1; }
.llh-port strong { display: block; font-size: 1rem; }
.llh-body { grid-column: 2; grid-row: 1 / 3; height: 100%; border: 3px solid #607989; border-radius: 18px; background: linear-gradient(#f6d1bc,#d8ecf6); display: grid; place-content: center; text-align: center; }
#bypass-arrow { font-size: 3rem; }
.llh-note { text-align: center; font-size: .85rem; margin-top: 1rem; }
.boiler-secondary { border: 3px solid #c7d5df; border-top-color: #bb512d; border-bottom-color: #2779a1; border-radius: 6px; padding: 1rem; display: grid; gap: .6rem; }
.boiler-secondary p { margin: 0; }
.boiler-secondary strong { font-size: 1.25rem; }
.boiler-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin-top: 1rem; }
.boiler-metrics > div { background: #f1f6f8; padding: .7rem; }
.boiler-metrics strong { display: block; }
#settings { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.boiler-settings { align-self: start; }
.boiler-settings summary { font-weight: 700; }
.boiler-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; margin-top: 1rem; }
.boiler-fields label { min-width: 0; }
.boiler-fields small { color: var(--muted); font-size: .75rem; }
.boiler-apply { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; padding: 1rem 0; }
#combined-chart svg { width: 100%; height: auto; }
.boiler-trends, .boiler-events, .boiler-notes { margin-block: 1rem; }
#events { max-height: 280px; overflow-y: auto; }
@media(max-width:1050px){ .boiler-piping { grid-template-columns: 1fr; } .llh { max-width: 440px; margin-inline: auto; } }
@media(max-width:680px){ .boiler-main { width: calc(100% - 1.5rem); } #settings,.boiler-fields,.boiler-metrics { grid-template-columns: 1fr; } .boiler-branches { grid-template-columns: 1fr; } .boiler-clock { margin-left: 0; } }