:root{--bg-canvas:215 20% 98.5%;--bg-surface:0 0% 100%;--bg-surface-1:215 18% 96%;--bg-card:0 0% 100%;--bg-elevated:215 16% 93%;--bg-glow:28 92% 94%;--primary:28 92% 33%;--primary-hover:28 92% 26%;--primary-contrast:0 0% 100%;--accent:215 88% 46%;--accent-success:152 75% 34%;--accent-warning:32 96% 44%;--accent-danger:0 84% 48%;--telemetry-amber:28 94% 45%;--telemetry-blue:215 88% 46%;--telemetry-emerald:152 75% 34%;--telemetry-red:0 84% 48%;--text-primary:215 35% 12%;--text-secondary:215 22% 28%;--text-muted:215 16% 46%;--border-subtle:215 18% 86%;--border-active:28 94% 45%;--border-highlight:215 35% 12%;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading:"Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"Space Grotesk", "JetBrains Mono", ui-monospace, monospace;--text-hero:clamp(2.25rem, 5vw, 4rem);--text-h1:clamp(1.85rem, 3.8vw, 3rem);--text-h2:clamp(1.4rem, 2.8vw, 2.1rem);--text-h3:clamp(1.15rem, 2vw, 1.45rem);--text-body:1rem;--text-sm:.875rem;--text-xs:.75rem;--tracking-tight:-.035em;--tracking-normal:0em;--tracking-wide:.18em;--shadow-sm:0 1px 2px 0 #1318200f;--shadow-md:0 4px 12px 0 #13182014;--shadow-lg:0 12px 32px -4px #1318201f;--shadow-hardware:inset 0 1px 0 0 #ffffff24, 0 1px 3px 0 #13182014;--specular-inset:inset 0 1px 0 0 #fffc, 0 1px 2px 0 #1318200d;--specular-card:inset 0 1px 0 0 #fffc;--ease-spring:cubic-bezier(.16, 1, .3, 1);--duration-fast:.15s;--duration-normal:.25s}:root[data-theme=dark],:root[data-theme=night]{--bg-canvas:220 22% 8%;--bg-surface:220 20% 12%;--bg-surface-1:220 20% 12%;--bg-card:220 18% 15%;--bg-elevated:220 18% 20%;--bg-glow:28 90% 15%;--primary:32 98% 52%;--primary-hover:32 98% 60%;--primary-contrast:220 25% 6%;--accent:211 100% 56%;--accent-success:142 71% 45%;--accent-warning:32 98% 54%;--accent-danger:0 84% 60%;--text-primary:220 15% 98%;--text-secondary:220 12% 78%;--text-muted:220 10% 58%;--border-subtle:220 15% 22%;--border-active:32 98% 52%;--border-highlight:0 0% 100%;--shadow-sm:0 1px 2px 0 #00000059;--shadow-md:0 4px 12px 0 #00000073;--shadow-lg:0 12px 32px -4px #0000008c;--specular-inset:inset 0 1px 0 0 #ffffff1f, 0 1px 2px 0 #0003;--specular-card:inset 0 1px 0 0 #ffffff14}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);background-color:hsl(var(--bg-canvas));color:hsl(var(--text-primary));-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;scroll-behavior:smooth;font-size:16px;line-height:1.65;overflow-x:clip}body{flex-direction:column;min-height:100vh;display:flex;position:relative;overflow-x:clip}.tabular-nums,[data-tabular=true],.metric-value,.calc-output{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}:focus-visible{outline:2px solid hsl(var(--border-active));outline-offset:2px}.skip-link{z-index:9999;background:hsl(var(--primary));color:hsl(var(--primary-contrast));border-radius:6px;padding:.75rem 1.25rem;font-weight:700;text-decoration:none;transition:top .2s ease-in-out;position:absolute;top:-9999px;left:1rem}.skip-link:focus{top:1rem}.hairline-divider{border:0;border-top:1px solid hsl(var(--border-subtle));width:100%;margin:0}.container-wide{width:100%;max-width:1240px;margin-left:auto;margin-right:auto;padding-left:clamp(1rem,4vw,2rem);padding-right:clamp(1rem,4vw,2rem)}.section-spacing{padding-top:clamp(4rem,7vw,7rem);padding-bottom:clamp(4rem,7vw,7rem)}button:active,.sub-btn:active,.platform-opt:active,.preset-btn:active,.insulation-btn:active,.calc-submit-btn:active{transform:scale(.98)}