:root{
  --paper:#EEF1F2; --sheet:#FFFFFF; --ink:#18222E; --steel:#55626F; --rule:#C9D1D6;
  --low:#1C63A8; --low-tint:#E3EDF7; --high:#B8322A; --high-tint:#F7E6E4;
  --measure:40rem;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Archivo",system-ui,sans-serif;font-size:1.125rem;line-height:1.55;font-variation-settings:"wdth" 100}
img{max-width:100%;height:auto;display:block}
a{color:var(--low);text-underline-offset:.18em}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--ink);outline-offset:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.5rem 1rem;z-index:10}
.skip:focus{left:1rem}

h1,h2,h3{font-variation-settings:"wdth" 68;line-height:1.02;margin:0;letter-spacing:-.005em}
h1{font-size:clamp(2.75rem,8.5vw,5.5rem);font-weight:850}
h2{font-size:clamp(1.6rem,3.6vw,2.2rem);font-weight:800}
h3{font-size:1.3rem;font-weight:750}
p{margin:0 0 1rem}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.9rem clamp(1rem,4vw,2.5rem);background:var(--ink)}
.brand{display:flex;align-items:center;gap:.65rem;color:#fff;text-decoration:none;font-weight:800;font-size:1.08rem;font-variation-settings:"wdth" 72}
.brand:hover .mark{transform:translateY(-1px)}
.brand:hover{color:#fff}
.mark{width:62px;height:31px;flex:none;transition:transform .15s ease}

.top nav{display:flex;align-items:center;gap:1.25rem}
.top nav a:not(.btn){color:#fff;text-decoration:none;font-weight:600}
@media (max-width:520px){.top nav a:not(.btn){display:none}.brand span{font-size:.95rem;white-space:nowrap}.brand{gap:.45rem}.mark{width:36px;height:18px}}
.btn-small .sm{display:none}
@media (max-width:420px){.top{gap:.5rem;padding-left:.8rem;padding-right:.8rem}.btn-small{font-size:.9rem;padding:.45rem .75rem}.btn-small .lg{display:none}.btn-small .sm{display:inline}.brand{min-width:0;gap:.45rem}.mark{width:42px;height:21px}.brand span{font-size:.86rem;font-variation-settings:"wdth" 62;letter-spacing:.005em;overflow:visible}}
@media (max-width:340px){.brand span{display:none}}

.btn{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;font-weight:750;padding:.8rem 1.35rem;border-radius:6px;font-variation-settings:"wdth" 85;border:2px solid var(--ink)}
.btn:hover{background:#fff;color:var(--ink)}
.btn-small{white-space:nowrap;background:#fff;color:var(--ink);border-color:#fff;padding:.5rem .95rem;font-size:.95rem}
.btn-small:hover{background:var(--ink);color:#fff}

main{padding:0 clamp(1rem,4vw,2.5rem)}

/* home hero: the manifold */
.hero{max-width:68rem;margin:0 auto;padding:clamp(2.5rem,7vw,5rem) 0 2.5rem}
.hero h1{max-width:12ch}
.lede{font-size:1.25rem;color:var(--steel);max-width:var(--measure);margin-top:1.1rem}
.manifold{display:grid;grid-template-columns:1fr 1fr;margin-top:2.25rem;background:var(--sheet);border:2px solid var(--ink);border-radius:10px;overflow:hidden}
.gauge{padding:1.5rem clamp(1rem,3vw,1.75rem) 1.75rem}
.gauge-cool{border-top:10px solid var(--low)}
.gauge-heat{border-top:10px solid var(--high);border-left:2px solid var(--ink)}
.gauge h2{display:flex;align-items:center;gap:.6rem;font-size:1.7rem;margin-bottom:1rem}
.dial{width:36px;height:36px;flex:none}
.gauge ul{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.sym{width:100%;text-align:left;font:inherit;font-size:1.05rem;font-weight:600;color:var(--ink);background:var(--paper);border:2px solid transparent;border-radius:6px;padding:.8rem 1rem;cursor:pointer}
.gauge-cool .sym:hover{border-color:var(--low)}
.gauge-heat .sym:hover{border-color:var(--high)}
.gauge-cool .sym[aria-pressed="true"]{background:var(--low);color:#fff}
.gauge-heat .sym[aria-pressed="true"]{background:var(--high);color:#fff}
@media (max-width:700px){.manifold{grid-template-columns:1fr}.gauge-heat{border-left:0;border-top:10px solid var(--high)}}

.result{margin-top:1.25rem;background:var(--sheet);border:2px solid var(--ink);border-left-width:10px;border-radius:10px;padding:1.5rem clamp(1rem,3vw,2rem)}
.result.r-cool{border-left-color:var(--low)}
.result.r-heat{border-left-color:var(--high)}
.result h3{font-size:1.5rem;margin-bottom:.35rem}
.result .r-sub{color:var(--steel);margin-bottom:.75rem}
.result ol{margin:0 0 1.25rem;padding-left:1.4rem;font-weight:600}
.result ol li{margin:.25rem 0}
.result .app-actions{margin-top:.5rem}
.r-note{font-size:1rem;color:var(--steel);margin:1rem 0 0}
@media (prefers-reduced-motion:no-preference){.result.show{animation:drop .25s ease-out}}
@keyframes drop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* guide rows */
.guides,.related{max-width:68rem;margin:0 auto;padding:2.5rem 0}
.guides h2,.related h2{margin-bottom:1rem}
.rows{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.row{border-bottom:1px solid var(--rule)}
.row a{display:flex;align-items:center;gap:1.1rem;padding:.9rem 0 .9rem 1rem;text-decoration:none;color:var(--ink);border-left:6px solid transparent}
.row-cool a{border-left-color:var(--low)}
.row-heat a{border-left-color:var(--high)}
.row a:hover{background:var(--sheet)}
.thumb{position:relative;flex:none;width:160px}
.thumb img{width:160px;aspect-ratio:16/9;object-fit:cover;border-radius:4px;background:var(--rule)}
.dur{position:absolute;right:4px;bottom:4px;background:rgba(24,34,46,.88);color:#fff;font-size:.8rem;font-weight:700;padding:1px 5px;border-radius:3px;font-variant-numeric:tabular-nums}
.row-text{display:flex;flex-direction:column;gap:.15rem}
.row-side{font-size:.9rem;font-weight:700;color:var(--steel)}
.row-cool .row-side{color:var(--low)}
.row-heat .row-side{color:var(--high)}
.row-title{font-size:1.2rem;font-weight:750;font-variation-settings:"wdth" 80;line-height:1.2}
@media (max-width:520px){.thumb,.thumb img{width:112px}.row a{gap:.8rem;padding-left:.7rem}.row-title{font-size:1.05rem}}

/* guide page */
.guide{max-width:46rem;margin:0 auto;padding-top:1.5rem}
.crumbs{font-size:.95rem;color:var(--steel)}
.guide-head{padding:1.75rem 0 1.5rem}
.side-tag{display:flex;align-items:center;gap:.5rem;font-weight:700;margin-bottom:.9rem}
.guide-cool .side-tag{color:var(--low)}
.guide-heat .side-tag{color:var(--high)}
.guide h1{font-size:clamp(2.3rem,6.5vw,3.9rem)}
.guide .lede{font-size:1.2rem;color:var(--ink)}

.video{margin:0 0 2rem}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;border:0;padding:0;cursor:pointer;background:#000 center/cover no-repeat;border-radius:8px;overflow:hidden}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.play{position:absolute;left:50%;top:50%;width:72px;transform:translate(-50%,-50%)}
.yt:hover .play path:first-child{fill:#8f241e}
.video figcaption{font-size:.95rem;color:var(--steel);margin-top:.5rem}
.video figcaption a{white-space:nowrap;font-weight:600}
.updated{font-size:.95rem;color:var(--steel);margin:0}
.video-small{max-width:32rem}

.prose h2{margin:2.25rem 0 .9rem}
.prose p,.prose li{max-width:var(--measure)}
.signs{padding-left:1.2rem;margin:0}
.signs li{margin:.35rem 0}
.steps{list-style:none;counter-reset:s;margin:1.25rem 0 0;padding:0}
.steps li{counter-increment:s;position:relative;padding:0 0 1.25rem 3.25rem;border-left:3px solid var(--rule);margin-left:1rem}
.steps li:last-child{border-left-color:transparent}
.steps li::before{content:counter(s);position:absolute;left:-1.1rem;top:-.1rem;width:2.2rem;height:2.2rem;border-radius:50%;display:grid;place-items:center;font-weight:850;color:#fff;background:var(--ink)}
.guide-cool .steps li::before{background:var(--low)}
.guide-heat .steps li::before{background:var(--high)}
.steps h3{margin:.15rem 0 .35rem}
.steps p{margin:0}

/* app callout */
.app{background:var(--ink);color:#fff;border-radius:10px;padding:clamp(1.5rem,4vw,2.5rem);margin:2.5rem 0;border-top:10px solid var(--low)}
.app-heat{border-top-color:var(--high)}
.app-home{max-width:68rem;margin:1rem auto 2.5rem;background:linear-gradient(90deg,var(--low) 0 50%,var(--high) 50% 100%) top/100% 10px no-repeat,var(--ink);border-top:0;padding-top:calc(clamp(1.5rem,4vw,2.5rem) + 10px)}
.app h2{color:#fff;margin-bottom:.9rem;max-width:22ch}
.app p{max-width:var(--measure);color:#D5DCE2}
.app-actions{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;margin:1.25rem 0 .75rem}
.app .btn{background:#fff;color:var(--ink);border-color:#fff}
.app .btn:hover{background:transparent;color:#fff}
.app .link{color:#fff;font-weight:600}
.app .fine{font-size:.95rem;margin:0;color:#AAB5BF}

/* author */
.author{display:flex;gap:1.1rem;align-items:flex-start;max-width:46rem;margin:0 auto;padding:1.5rem 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.home .author{max-width:68rem}
.author img{width:72px;height:72px;border-radius:50%;flex:none;background:var(--ink);object-fit:cover}
.author-name{font-weight:800;margin-bottom:.25rem}
.author p{font-size:1rem}
.author p:last-child{margin:0;color:var(--steel)}

/* footer */
.foot{display:grid;grid-template-columns:2fr 1fr;gap:1.5rem 3rem;padding:2.5rem clamp(1rem,4vw,2.5rem);margin-top:3rem;background:var(--ink);color:#C3CCD4;font-size:.95rem}
.foot a{color:#fff}
.foot-brand{display:flex;align-items:center;gap:.65rem;color:#fff;font-weight:800;font-size:1.05rem}

.foot p{max-width:var(--measure)}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.copy{grid-column:1/-1;margin:0;color:#8C99A5}
@media (max-width:700px){.foot{grid-template-columns:1fr}}

/* app screenshots */
.shots{max-width:68rem;margin:0 auto;padding:1rem 0 2.5rem}
.shots-lede{color:var(--steel);max-width:var(--measure);margin-top:.6rem}
.shot-rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(240px,268px);gap:1.25rem;overflow-x:auto;padding:1.5rem .25rem 1.75rem;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.shot{margin:0;scroll-snap-align:start}
.shot img{width:100%;height:auto;border-radius:14px;border:2px solid var(--ink);background:#0f1620;box-shadow:0 8px 22px rgba(24,34,46,.16)}
.shot figcaption{margin-top:.75rem;font-size:1rem;line-height:1.4}
.shot figcaption b{display:block;font-weight:800;font-variation-settings:"wdth" 82}
.shot figcaption span{display:block;color:var(--steel);font-size:.95rem;margin-top:.15rem}
.shots-cta{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.25rem;margin:0}
.fine-dark{color:var(--steel);font-size:.95rem}
.shot-rail::-webkit-scrollbar{height:10px}
.shot-rail::-webkit-scrollbar-thumb{background:var(--rule);border-radius:6px}
.shot-rail::-webkit-scrollbar-track{background:transparent}

/* header ghost button */
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);font:inherit;font-weight:750;cursor:pointer;font-size:.95rem;padding:.5rem .95rem;font-variation-settings:"wdth" 85}
.btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
@media (max-width:520px){.btn-ghost{display:none}}

.hero-tour{margin:1.1rem 0 0}
.link-btn{background:none;border:0;padding:0;font:inherit;font-weight:700;color:var(--low);cursor:pointer;text-decoration:underline;text-underline-offset:.18em}
.link-btn:hover{color:var(--ink)}

/* thumbnail buttons */
.shot-btn{display:block;width:100%;padding:0;border:0;background:none;cursor:pointer;position:relative;border-radius:14px}
.shot-btn .shot-zoom{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);background:rgba(24,34,46,.92);color:#fff;font-size:.85rem;font-weight:700;padding:.4rem .8rem;border-radius:999px;opacity:0;transition:opacity .15s ease;white-space:nowrap}
.shot-btn:hover .shot-zoom,.shot-btn:focus-visible .shot-zoom{opacity:1}
@media (hover:none){.shot-btn .shot-zoom{opacity:1}}

/* full-screen tour */
body.tour-open{overflow:hidden}
.tour{position:fixed;inset:0;z-index:50;background:#0B1118;display:flex;flex-direction:column;color:#fff}
.tour[hidden]{display:none}
.tour-bar{display:flex;align-items:center;justify-content:space-between;padding:.75rem clamp(.75rem,3vw,1.5rem);flex:none}
.tour-count{margin:0;font-weight:700;color:#AEBBC7;font-variant-numeric:tabular-nums}
.tour-x{background:none;border:0;color:#fff;font-size:2.4rem;line-height:1;cursor:pointer;padding:0 .35rem}
.tour-stage{flex:1 1 auto;min-height:0;display:flex;align-items:center;gap:.5rem;padding:0 clamp(.5rem,2vw,1.5rem)}
.tour-track{flex:1 1 auto;min-width:0;height:100%;display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.tour-track::-webkit-scrollbar{display:none}
.tour-slide{flex:0 0 100%;scroll-snap-align:center;margin:0;height:100%;display:flex;align-items:center;justify-content:center}
.tour-slide img{max-height:100%;max-width:min(100%,460px);width:auto;height:auto;object-fit:contain;border-radius:12px;border:1px solid rgba(255,255,255,.14)}
.tour-nav{flex:none;background:rgba(255,255,255,.1);border:0;color:#fff;font-size:2rem;line-height:1;width:48px;height:64px;border-radius:8px;cursor:pointer}
.tour-nav:hover{background:rgba(255,255,255,.22)}
.tour-foot{flex:none;text-align:center;padding:1rem clamp(1rem,4vw,2rem) calc(1rem + env(safe-area-inset-bottom))}
.tour-cap{margin:0 auto .8rem;max-width:34rem}
.tour-cap b{display:block;font-size:1.15rem;font-weight:800;font-variation-settings:"wdth" 80}
.tour-cap span{display:block;color:#AEBBC7;font-size:.98rem;margin-top:.15rem}
.tour .btn{background:#fff;color:var(--ink);border-color:#fff}
.tour .btn:hover{background:transparent;color:#fff}
.tour-fine{margin:.7rem 0 0;font-size:.9rem;color:#8C99A5}
@media (max-width:700px){.tour-nav{display:none}.tour-cap b{font-size:1.05rem}.tour-cap span{font-size:.92rem}}