/* Geist and Geist Mono are hosted on Google Fonts; the brand book forbids self-hosted files.
   Consumers should also add the link tag in <head> for earlier loading:
   <link href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600&family=Geist+Mono:wght@500&display=swap" rel="stylesheet"> */
@import url("https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600&family=Geist+Mono:wght@500&display=swap");

/* Raio colour: one Night theme. The page is dark and every colour on it comes from a light source. */
:root, [data-theme="night"] {
  /* canvas */
  --canvas: #0b0d16;
  --canvas-2: #10131f;
  /* ink */
  --ink: #f7f2e8;
  --ink-2: #b9b3a6;
  --ink-muted: #7a766d;
  /* light */
  --solar: #ffc249;
  --on-solar: #151007;
  --light: #ffd27a;
  --light-core: #fff1cf;
  --ember: #ff7a45;
  /* glass */
  --glass: #ffffff0f;
  --glass-2: #ffffff1a;
  --edge: #ffffff24;
  --edge-hi: #ffffff38;
  /* semantic */
  --link: var(--light);
  --focus: var(--light);
  --danger: #ff7a5c;
  --success: #8fd1a0;

  /* aliases */
  --surface-page: var(--canvas);
  --surface-stage: var(--canvas-2);
  --surface-glass: var(--glass);
  --surface-glass-lit: var(--glass-2);
  --surface-field: rgba(255,255,255,0.04);
  --surface-nav: rgba(11,13,22,0.55);
  --surface-tag: rgba(11,13,22,0.75);
  --text-body: var(--ink);
  --text-secondary: var(--ink-2);
  --text-placeholder: var(--ink-muted);
  --text-on-solar: var(--on-solar);
  --border-default: var(--edge);
  --border-lit: var(--edge-hi);
  --link-underline: rgba(255,210,122,0.35);
  --focus-ring-soft: rgba(255,210,122,0.18);
  --path-rest: rgba(255,255,255,0.08);
  --lamp-off: rgba(255,255,255,0.12);

  /* gradients */
  --gradient-text: linear-gradient(115deg, #fff8ea 0%, #ffe9b0 45%, #ffc249 100%); 
  --gradient-path: linear-gradient(180deg, var(--light-core), var(--light) 60%, var(--ember)); 
  --gradient-sheen: linear-gradient(115deg, rgba(255,255,255,0.18), transparent 40%); 
  --gradient-sheen-thumb: linear-gradient(115deg, rgba(255,255,255,0.16), transparent 45%); 
  --field-amber: radial-gradient(circle at center, rgba(255,194,73,0.5), rgba(255,122,69,0.2) 45%, transparent 70%); 
  --field-ember: radial-gradient(ellipse at center, rgba(255,194,73,0.32), transparent 65%); 
  --field-horizon: radial-gradient(ellipse at 50% 100%, rgba(255,170,70,0.45), rgba(255,122,69,0.15) 40%, transparent 70%); 
  --field-cursor: radial-gradient(circle, rgba(255,210,122,0.16), transparent 60%); 
}

/* One family: Geist at 400, 500, 600 with 500 as the heaviest weight in use. Geist Mono at 500 for figures. */
:root {
  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* display */
  --type-display: 500 clamp(50px, 7vw, 88px)/0.98 var(--font-sans); 
  --track-display: -0.045em; 
  --type-h1: 500 56px/1.02 var(--font-sans); 
  --track-h1: -0.04em; 
  --type-h2: 500 clamp(34px, 4.4vw, 48px)/1.05 var(--font-sans); 
  --track-h2: -0.035em; 
  --type-h3-lg: 500 32px/1.15 var(--font-sans); 
  --track-h3-lg: -0.03em; 
  --type-h3: 500 24px/1.25 var(--font-sans); 
  --track-h3: -0.015em; 

  /* text */
  --type-body-lg: 400 19px/1.5 var(--font-sans); 
  --type-body: 400 17px/1.55 var(--font-sans); 
  --type-question: 500 19px/1.3 var(--font-sans); 
  --type-small: 400 14px/1.5 var(--font-sans); 
  --type-label: 500 13px/1.4 var(--font-sans); 
  --type-button: 500 15px/1 var(--font-sans); 
  --type-tag: 500 12px/1.4 var(--font-sans); 

  /* figures */
  --type-figure: 500 15px/1.4 var(--font-mono); 
  --type-marker: 500 12px/1 var(--font-mono); 
  --type-figure-lg: 500 32px/1 var(--font-mono); 

  /* measure */
  --measure-body: 75ch; 
  --measure-intro: 36ch; 
  --measure-running: 58ch; 
}

/* A 4px unit. Every gap, padding and gutter is one of these steps. */
:root {
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-30: 120px;

  /* layout */
  --content-width: 1180px; 
  --page-padding: var(--space-12); 
  --page-padding-mobile: 22px; 
  --section-padding: var(--space-30); 
  --section-padding-mobile: 80px; 
  --nav-height: 72px; 
  --breakpoint-stack: 860px; 

  /* radius: smooth, nothing sharp, nothing square */
  --radius-s: 12px;
  --radius-m: 20px;
  --radius-l: 32px;
  --radius-pill: 999px;
}

/* Depth is real: deep shadows under things that float, glow around things that are lit, a lit top edge on glass. */
:root {
  /* shadow */
  --deep: 0 40px 80px -24px rgba(0,0,0,0.7);
  --glow: 0 0 80px rgba(255,194,73,0.22);
  --glow-strong: 0 0 120px rgba(255,194,73,0.3);
  --glow-panel: 0 0 90px -20px rgba(255,194,73,0.35); 
  --glow-row: 0 0 60px -20px rgba(255,194,73,0.5); 
  --glass-edge: inset 0 1px 0 rgba(255,255,255,0.22); 
  --glass-ring: 0 0 0 1px var(--edge); 
  --button-glow: 0 10px 30px -10px rgba(255,194,73,0.6);
  --button-glow-hover: 0 16px 40px -10px rgba(255,194,73,0.75); 
  --lamp: 0 0 26px 6px rgba(255,210,122,0.7);
  --node-glow: 0 0 30px rgba(255,210,122,0.8); 
  --path-glow: 0 0 18px rgba(255,210,122,0.8); 
  --mark-glow: drop-shadow(0 0 10px rgba(255,194,73,0.6)); 

  /* blur: never on an element with overflow hidden or a blend mode */
  --blur-nav: 20px;
  --blur-glass: 18px;
  --blur-chip: 12px;
  --blur-halo: 36px;
  --blur-core: 16px;
  --blur-pulse: 18px;
  --blur-field: 60px;
  --blur-horizon: 20px;

  /* motion: things light up, nothing dims */
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1); 
  --ease-travel: cubic-bezier(0.4, 0, 0.2, 1); 
  --duration-fast: 150ms; 
  --duration-base: 200ms; 
  --duration-chevron: 250ms; 
  --duration-slow: 300ms; 
  --duration-lamp: 350ms; 
  --duration-panel: 600ms; 
  --duration-frame: 800ms; 
  --duration-sweep: 2.6s; 
  --duration-breathe: 7s; 
  --duration-travel: 5.5s; 

  /* focus */
  --focus-ring: 2px solid var(--focus); 
  --focus-offset: 3px; 

  /* tilt */
  --tilt-hero: perspective(1400px) rotateY(-6deg) rotateX(2deg); 
  --tilt-left: rotateY(10deg) translateZ(-40px); 
  --tilt-right: rotateY(-10deg) translateZ(-40px); 
}

/* Minimal page defaults so a consumer's page reads as Raio before any component loads. */
html { background: var(--canvas); }
body { margin: 0; background: var(--canvas); color: var(--ink); font: var(--type-body); -webkit-font-smoothing: antialiased; }
a { color: var(--link); text-decoration: none; border-bottom: 1px solid var(--link-underline); transition: border-color var(--duration-base) ease; }
a:hover { border-color: var(--light); }
:is(a, button, input, textarea, summary, select, [tabindex]):focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-offset); }
::selection { background: rgba(255,210,122,0.28); color: var(--ink); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; } }

/* ---- page and component styles (built from light) ---- */
*{box-sizing:border-box}
h1,h2,h3,p,ul,ol,figure{margin:0}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--content-width);margin:0 auto;padding:0 var(--page-padding);position:relative}
section{position:relative;padding:var(--section-padding) 0}
html{scroll-padding-top:calc(var(--nav-height) + 1px)}
.display{font:var(--type-display);letter-spacing:var(--track-display);color:var(--ink)}
.h1{font:var(--type-h1);letter-spacing:var(--track-h1);color:var(--ink)}
.h2{font:var(--type-h2);letter-spacing:var(--track-h2);color:var(--ink)}
.h3{font:var(--type-h3);letter-spacing:var(--track-h3);color:var(--ink)}
.h3-lg{font:var(--type-h3-lg);letter-spacing:var(--track-h3-lg);color:var(--ink)}
.lum{background:var(--gradient-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.glow{font-weight:500;color:var(--light);text-shadow:0 0 18px rgba(255,194,73,.5)}
.kicker{font:var(--type-small);color:var(--ink-2)}
.lead{font:var(--type-body-lg);color:var(--ink-2);max-width:var(--measure-intro)}
.lead.wide{max-width:var(--measure-running)}
.intro{margin-top:14px;font:var(--type-body);color:var(--ink-2);max-width:var(--measure-running)}
.body{font:var(--type-body);color:var(--ink-2);max-width:var(--measure-running)}
.body b{font-weight:500;color:var(--ink)}
.small{font:var(--type-small);color:var(--ink-2)}
.stack>*+*{margin-top:14px}
/* actions */
.btn{display:inline-flex;align-items:center;justify-content:center;font:var(--type-button);padding:15px 22px;border-radius:var(--radius-s);border:0;cursor:pointer;background:var(--solar);color:var(--on-solar);text-decoration:none;box-shadow:0 0 0 1px rgba(255,255,255,.08) inset,var(--button-glow);transition:transform var(--duration-base) var(--ease),box-shadow var(--duration-base) var(--ease);white-space:nowrap}
.btn:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,255,255,.12) inset,var(--button-glow-hover);border:0}
.btn:active{transform:scale(.985)}
.btn.compact{padding:12px 18px}
.btn.sec{background:var(--glass-2);color:var(--ink);box-shadow:var(--glass-edge),var(--glass-ring)}
.link{font-weight:500;color:var(--link);text-decoration:none;border-bottom:1px solid var(--link-underline);transition:border-color var(--duration-base) ease}
.link:hover{border-color:var(--light)}
.chip{display:inline-flex;align-items:center;font:var(--type-label);padding:7px 13px;border-radius:var(--radius-pill);background:var(--glass);border:1px solid var(--edge);color:var(--ink);backdrop-filter:blur(var(--blur-chip));-webkit-backdrop-filter:blur(var(--blur-chip));white-space:nowrap;text-decoration:none;transition:background var(--duration-fast) ease,border-color var(--duration-fast) ease}
.chip.on,.chip[aria-selected="true"]{background:var(--glass-2);border-color:var(--edge-hi)}
button.chip{cursor:pointer;font-family:var(--font-sans)}
button.chip:hover{background:var(--glass-2)}
.chips{display:flex;flex-wrap:wrap;gap:var(--space-2)}
.glass{background:var(--glass);border:1px solid var(--edge);box-shadow:var(--glass-edge);backdrop-filter:blur(var(--blur-glass));-webkit-backdrop-filter:blur(var(--blur-glass));border-radius:var(--radius-m)}
/* nav */
.nav{position:sticky;top:0;z-index:30;background:var(--surface-nav);backdrop-filter:blur(var(--blur-nav)) saturate(140%);-webkit-backdrop-filter:blur(var(--blur-nav)) saturate(140%);border-bottom:1px solid var(--edge)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:var(--nav-height);gap:var(--space-6)}
.lockup{display:inline-flex;align-items:baseline;gap:0;font:500 23px/1 var(--font-sans);letter-spacing:-.04em;color:var(--ink);text-decoration:none;border:0;position:relative;top:-3px}
.lockup:hover{border:0}
.lockup b{font-weight:inherit}
.lockup img{width:22px;height:22px;position:relative;top:4px;z-index:1}
.lockup::before{content:"";position:absolute;left:-11px;top:-7px;width:44px;height:44px;border-radius:50%;background:radial-gradient(circle,rgba(255,194,73,.42),rgba(255,194,73,.12) 45%,transparent 70%);filter:blur(5px);pointer-events:none}
footer .lockup{top:-2px}
.links{display:flex;align-items:center;gap:26px;font:var(--type-label);font-size:14px;color:var(--ink-2)}
.links>a:not(.btn){color:inherit;text-decoration:none;border:0;transition:color var(--duration-fast) ease;white-space:nowrap}
.links>a:not(.btn):hover,.links>a[aria-current="page"]{color:var(--ink)}
.menu{position:relative}
.menu summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;transition:color var(--duration-fast) ease}
.menu summary::-webkit-details-marker{display:none}
.menu:not(.lang) summary:hover,.menu[open]:not(.lang) summary,.menu.current summary{color:var(--ink)}
.menu summary svg{width:9px;height:6px;transition:transform var(--duration-chevron) ease}
.menu[open] summary svg{transform:rotate(180deg)}
.menu-panel{position:absolute;top:calc(100% + 10px);right:0;min-width:180px;padding:6px;background:var(--canvas-2);border:1px solid var(--edge);border-radius:var(--radius-s);box-shadow:var(--glass-edge),var(--deep);backdrop-filter:blur(var(--blur-glass));-webkit-backdrop-filter:blur(var(--blur-glass));display:grid;gap:2px;z-index:40}
.menu.about .menu-panel{right:auto;left:0}
.menu-panel a{font:var(--type-label);font-size:14px;color:var(--ink-2);text-decoration:none;border:0;padding:10px 12px;border-radius:8px;display:flex;justify-content:space-between;gap:12px;white-space:nowrap}
.menu-panel a:hover,.menu-panel a[aria-current]{color:var(--ink);background:var(--glass-2)}
.menu-panel a span{color:var(--ink-muted)}
.nav-right{display:none;align-items:center;gap:var(--space-4)}
.burger{width:44px;height:44px;border:0;background:transparent;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-s)}
.burger svg{width:22px;height:22px}
.sheet{display:none}
/* light */
.field{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.field i{position:absolute;border-radius:50%;filter:blur(var(--blur-field));display:block}
.field .amber{width:70vw;height:70vw;max-width:900px;max-height:900px;right:-20vw;top:-30vw;background:var(--field-amber)}
.field .ember{width:60vw;height:40vw;max-width:800px;left:20%;bottom:-20vw;background:var(--field-ember)}
.field .horizon{position:absolute;left:-10%;right:-10%;bottom:-30%;height:60%;border-radius:0;background:var(--field-horizon);filter:blur(var(--blur-horizon))}
.field .horizon.low{bottom:-20%}
.beam{position:absolute;left:-20%;width:150%;height:640px;top:80%;margin-top:-320px;transform:rotate(-12deg);transform-origin:center;pointer-events:none;-webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 25%,#000 75%,transparent 100%);mask-image:linear-gradient(90deg,transparent 0%,#000 25%,#000 75%,transparent 100%);animation:sweep var(--duration-sweep) var(--ease) both}
.beam>div{position:absolute;left:0;right:0;top:50%}
.halo{height:400px;margin-top:-200px;animation:none;background:linear-gradient(180deg,rgba(255,210,122,0) 0%,rgba(255,210,122,.10) 25%,rgba(255,236,190,.40) 50%,rgba(255,210,122,.10) 75%,rgba(255,210,122,0) 100%);filter:blur(var(--blur-halo));animation:breathe var(--duration-breathe) ease-in-out var(--duration-sweep) infinite}
.core{height:170px;margin-top:-85px;background:linear-gradient(180deg,rgba(255,220,150,0) 0%,rgba(255,228,170,.30) 25%,rgba(255,246,224,.9) 50%,rgba(255,228,170,.30) 75%,rgba(255,220,150,0) 100%);filter:blur(var(--blur-core))}
.pulse{left:-30%;right:auto;width:30%;height:260px;margin-top:-130px;background:radial-gradient(ellipse at center,rgba(255,255,255,.85) 0%,rgba(255,255,255,.35) 30%,rgba(255,255,255,0) 68%);filter:blur(var(--blur-pulse));animation:travel var(--duration-travel) var(--ease-travel) var(--duration-sweep) infinite}
.beam.second{display:none;left:33%;width:100%;height:400px;top:50%;margin-top:-200px;transform:rotate(45deg);animation-delay:.4s}
@media (min-width:1100px){.beam.second{display:block}}
.hero .beam:not(.second){top:88%}
.beam.second .halo{height:240px;margin-top:-120px;opacity:.8;filter:blur(28px)}
.beam.second .core{height:100px;margin-top:-50px;filter:blur(12px)}
@keyframes breathe{0%,100%{opacity:.85}50%{opacity:1.15}}
@keyframes travel{0%{left:-30%}100%{left:130%}}
@keyframes sweep{from{opacity:0;translate:-45% 0}to{opacity:1;translate:0 0}}
.cursor{position:absolute;left:var(--mx,60%);top:var(--my,40%);width:520px;height:520px;margin:-260px 0 0 -260px;border-radius:50%;background:var(--field-cursor);pointer-events:none;filter:blur(30px);transition:left .6s var(--ease),top .6s var(--ease)}
/* hero */
.hero{min-height:calc(100vh - var(--nav-height));display:flex;align-items:center;padding:72px 0 96px;overflow:hidden;isolation:isolate}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:56px;align-items:center;justify-items:center;text-align:center;z-index:2;width:100%}
.hero .display{font-size:clamp(60px,11vw,128px);max-width:11ch;margin-left:auto;margin-right:auto}
.hero .kicker{font-size:16px}
.hero .lead{font-size:22px;max-width:none;margin-left:auto;margin-right:auto;text-align:center;text-wrap:balance}
.hero .wrap>div{width:100%;text-align:center}
.hero .actions,.hero .meta{justify-content:center}
.hero .kicker{margin-bottom:22px}
.hero .lead{margin:26px auto 34px}
.actions{display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center}
.meta{margin-top:34px}
.frame{position:relative;border-radius:var(--radius-m);overflow:hidden;background:#f5f7fa;border:1px solid var(--edge-hi);box-shadow:var(--deep),var(--glow);transform:var(--tilt-hero);transition:transform var(--duration-frame) var(--ease),box-shadow var(--duration-frame) var(--ease)}
.frame:hover{transform:perspective(1400px) rotateY(0) rotateX(0);box-shadow:var(--deep),var(--glow-strong)}
.frame.flat,.frame.flat:hover{transform:none;box-shadow:var(--deep)}
.frame.flat:hover{box-shadow:var(--deep),var(--glow)}
.frame::after{content:"";position:absolute;inset:0;background:var(--gradient-sheen);pointer-events:none}
.frame .tag{position:absolute;top:12px;right:12px;font:var(--type-tag);padding:6px 11px;border-radius:var(--radius-pill);background:var(--surface-tag);color:var(--ink);border:1px solid var(--edge);backdrop-filter:blur(8px);z-index:1}
/* light rule between sections: a horizontal echo of the step path */
.rule{position:absolute;left:var(--page-padding);right:var(--page-padding);bottom:calc(-1 * var(--sp,var(--section-padding)));height:1px;pointer-events:none}
.rule::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,210,122,.55) 30%,var(--light-core) 50%,rgba(255,210,122,.55) 70%,transparent);box-shadow:var(--path-glow);transform:scaleX(0);transform-origin:50% 50%;transition:transform 1.4s var(--ease)}
.rule::after{content:"";position:absolute;left:20%;right:20%;top:-36px;height:72px;background:radial-gradient(ellipse at 50% 50%,rgba(255,210,122,.16),transparent 70%);filter:blur(12px);opacity:0;transition:opacity 1s var(--ease) .5s}
.rule.lit::before{transform:scaleX(1)} .rule.lit::after{opacity:1}
/* more air around the rule between the questions and the checklist */
#faq,#problems{--sp:calc(var(--section-padding) * 1.5);padding-bottom:var(--sp)} #fit,#method{padding-top:calc(var(--section-padding) * 1.5)}
/* dawn: a soft glow straddling a section boundary, no clipped edge */
.dawn{position:absolute;left:0;right:0;bottom:0;height:0;pointer-events:none}
.dawn.top{top:0;bottom:auto;z-index:1}
.dawn::before{content:"";position:absolute;left:0;right:0;top:-200px;height:400px;background:radial-gradient(ellipse 55% 50% at 50% 50%,rgba(255,170,70,.30),rgba(255,122,69,.10) 45%,transparent 75%);filter:blur(24px)}
/* two-column sections */
.two{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:var(--space-16);align-items:start}
.two .head{position:sticky;top:200px;align-self:start}
.two:has(.foot) .head{grid-row:1/span 2}
.panels{display:grid;gap:var(--space-2)}
.panel{position:relative;padding:34px 36px;border-radius:var(--radius-m);background:var(--glass);box-shadow:var(--glass-edge),var(--glass-ring),var(--glow-panel);transition:background var(--duration-slow) var(--ease),box-shadow var(--duration-slow) var(--ease)}
.panel:hover,.panel.lit{background:var(--glass-2);box-shadow:var(--glass-edge),0 0 0 1px var(--edge-hi)}
.panel h3{margin-bottom:10px;font:var(--type-h3-lg);letter-spacing:var(--track-h3-lg);color:var(--ink);transition:color var(--duration-slow) var(--ease),text-shadow var(--duration-slow) var(--ease)}
.panel:hover h3,.panel.lit h3{color:var(--light);text-shadow:0 0 18px rgba(255,194,73,.5)}
.panel p{font:var(--type-body);color:var(--ink-2);max-width:44ch}
.foot{grid-column:2;margin-top:64px;font:var(--type-body);color:var(--ink-2);max-width:60ch;transition:color var(--duration-slow) var(--ease)}
.foot b{font-weight:500;color:var(--ink);transition:color var(--duration-slow) var(--ease),text-shadow var(--duration-slow) var(--ease)}
.foot.lit{color:var(--ink)} .foot.lit b{color:var(--light);text-shadow:0 0 18px rgba(255,194,73,.5)}
/* steps */
.steps{display:grid;grid-template-columns:72px minmax(0,1fr);gap:0 28px;margin-top:56px;position:relative}
.path{grid-column:1;grid-row:1/span var(--n,4);position:relative;width:2px;justify-self:center;background:var(--path-rest);border-radius:2px}
.path::after{content:"";position:absolute;left:0;top:0;width:100%;height:calc(var(--p,0) * 100%);background:var(--gradient-path);box-shadow:var(--path-glow);border-radius:2px;transition:height .15s linear}
.step{grid-column:2;display:grid;grid-template-columns:minmax(0,1fr) 170px;gap:28px;align-items:start;padding:8px 0 var(--space-16);position:relative}
.step:last-child{padding-bottom:0}
.node{position:absolute;left:-100px;top:8px;width:72px;display:flex;justify-content:center}
.node span{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font:var(--type-marker);color:var(--ink-2);background:var(--canvas);border:1px solid var(--edge);transition:all .4s var(--ease)}
.step.lit .node span{color:var(--on-solar);background:var(--light);border-color:var(--light-core);box-shadow:var(--node-glow)}
.step-main{display:grid;gap:10px;min-width:0}
.step h3{font:var(--type-h3-lg);font-size:30px;letter-spacing:var(--track-h3-lg);color:var(--ink)}
.step p{font:var(--type-body);color:var(--ink-2);max-width:58ch}
.step .side{justify-self:end;margin-top:6px}
.steps.plain{grid-template-columns:minmax(0,1fr);margin-top:40px}
.steps.plain .step{grid-column:1;padding:var(--space-8) 0;border-top:1px solid var(--edge)}
.steps.plain .step:first-child{border-top:0;padding-top:0}
.steps.plain .step h3{font:var(--type-h3);letter-spacing:var(--track-h3)}
.steps.plain .step h3 a{color:inherit;border-bottom:1px solid var(--link-underline)}
.steps.plain .step h3 a:hover{border-color:var(--light)}
.step-meta{font:var(--type-small);color:var(--ink-2)}
.step-figure{font:var(--type-body);color:var(--ink);max-width:58ch}
.step-status{display:flex;align-items:center;gap:10px;font:var(--type-small);color:var(--ink-2)}
.step-status i{width:8px;height:8px;border-radius:50%;flex:none;background:var(--lamp-off);box-shadow:0 0 0 1px var(--edge)}
.step-status.lit{color:var(--ink)} .step-status.lit i{background:var(--light-core);box-shadow:0 0 0 1px var(--light-core),0 0 14px 3px rgba(255,210,122,.6)}
.step-note{font:var(--type-small);color:var(--ink-2);max-width:58ch}
/* stage */
.thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-6);perspective:1600px;margin:48px 0 32px}
.thumb{display:block;text-decoration:none;color:inherit;border:0}
.thumb-frame{position:relative;border-radius:var(--radius-m);overflow:hidden;background:#f5f7fa;border:1px solid var(--edge-hi);box-shadow:var(--deep);aspect-ratio:16/10.5;transition:transform .7s var(--ease),box-shadow .7s var(--ease)}
.thumb-frame img{width:100%;height:100%;object-fit:cover;object-position:top left}
.thumb-frame::after{content:"";position:absolute;inset:0;background:var(--gradient-sheen-thumb);pointer-events:none}
.thumb:nth-child(1) .thumb-frame{transform:var(--tilt-left)} .thumb:nth-child(3) .thumb-frame{transform:var(--tilt-right)}
.thumb:hover .thumb-frame{transform:rotateY(0) translateZ(20px);box-shadow:var(--deep),var(--glow)}
.thumb .cap{margin-top:var(--space-8)}
.thumb .cap b{display:block;font:var(--type-body);font-weight:500;color:var(--ink)}
.thumb .cap span{font:var(--type-small);font-size:15px;color:var(--ink-2)}
/* faq */
.qa{padding:8px 32px}
.qa details{border-top:1px solid var(--edge)} .qa details:first-child{border-top:0}
.qa summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:24px;align-items:center;padding:24px 0;font:var(--type-question);color:var(--ink-2);transition:color var(--duration-slow) ease}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"";width:12px;height:12px;flex:none;border-right:1.5px solid var(--ink-2);border-bottom:1.5px solid var(--ink-2);transform:rotate(45deg) translate(-2px,-2px);transition:transform var(--duration-chevron) ease,border-color var(--duration-chevron) ease}
.qa details[open] summary{color:var(--ink)}
.qa details[open] summary::after{transform:rotate(225deg) translate(-1px,-1px);border-color:var(--light)}
.qa p{font:var(--type-body);color:var(--ink-2);padding:0 0 26px;max-width:58ch}
/* lamps */
.lamps{display:grid;gap:var(--space-3);margin-top:36px;max-width:780px}
.lamp{display:flex;align-items:center;gap:18px;padding:18px 22px;border-radius:var(--radius-s);cursor:pointer;font:var(--type-question);font-weight:400;line-height:1.4;color:var(--ink);transition:background var(--duration-lamp) ease,box-shadow var(--duration-lamp) ease}
.lamp input{appearance:none;-webkit-appearance:none;width:14px;height:14px;flex:none;border-radius:50%;background:var(--lamp-off);box-shadow:0 0 0 1px var(--edge);cursor:pointer;transition:all var(--duration-lamp) var(--ease);margin:0;border:0}
.lamp input:checked{background:var(--light-core);box-shadow:0 0 0 1px var(--light-core),var(--lamp)}
.lamp:has(input:checked){background:var(--glass-2);box-shadow:var(--glass-edge),var(--glass-ring),var(--glow-row)}
.lamp:has(input:focus-visible){outline:var(--focus-ring);outline-offset:var(--focus-offset)} .lamp input:focus-visible{outline:0}
.verdict{margin-top:var(--space-8);display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;font:var(--type-body);color:var(--ink-2);transition:color var(--duration-slow) ease}
.verdict.hot{color:var(--ink)}
.verdict .btn{opacity:0;visibility:hidden;transform:translateY(6px);transition:none}
.verdict.hot .btn{opacity:1;visibility:visible;transform:none;transition:opacity var(--duration-slow) var(--ease),transform var(--duration-slow) var(--ease),visibility 0s}
/* contact */
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:var(--space-16);align-items:start}
.contact-grid .h2{margin-top:-.19em} .contact-grid .lead{margin-top:18px}
.form{padding:var(--space-8);display:grid;gap:var(--space-4)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4)}
.form label{display:grid;gap:8px;font:var(--type-label);color:var(--ink-2)}
.form input,.form textarea{font:400 15px/1.4 var(--font-sans);color:var(--ink);background:var(--surface-field);border:1px solid var(--edge);border-radius:var(--radius-s);padding:13px 14px;width:100%;transition:border-color var(--duration-base) ease,box-shadow var(--duration-base) ease;-webkit-appearance:none;appearance:none}
.form textarea{min-height:120px;resize:vertical}
.form ::placeholder{color:var(--ink-muted)}
.form input:hover,.form textarea:hover{border-color:var(--edge-hi)}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--light);box-shadow:0 0 0 3px var(--focus-ring-soft)}
.form input:user-invalid{border-color:var(--danger)}
.form .note{font:var(--type-label);font-weight:400;color:var(--ink-2);margin-top:4px}
.close .lead{margin-top:18px;max-width:58ch} .close .btn{margin-top:28px} .close .small{margin-top:16px}
/* pages */
.page-head{padding-top:96px;padding-bottom:var(--space-12)}
.page-head .kicker{margin-bottom:18px} .page-head .lead{margin-top:18px;max-width:58ch} .page-head .body{margin-top:14px} .page-head .chips{margin-top:28px}
.prose{display:grid;gap:var(--space-12)} .prose>*{max-width:var(--measure-running)}
.prose h2{margin-bottom:12px;font:var(--type-h3-lg);letter-spacing:var(--track-h3-lg);color:var(--ink)}
.prose h3{margin-bottom:8px;font:var(--type-h3);letter-spacing:var(--track-h3);color:var(--ink)}
.prose .anchor{color:var(--ink)}
.prose ul,.prose ol{padding-left:22px;font:var(--type-body);color:var(--ink-2);display:grid;gap:6px}
.pull{font:var(--type-h3-lg);letter-spacing:var(--track-h3-lg);color:var(--ink);max-width:24ch}
.legal .prose>*{max-width:var(--measure-body)} .legal .prose h2{font:var(--type-h3);letter-spacing:var(--track-h3)}
.back{margin-top:var(--space-12)}
.pricing{overflow:hidden;max-width:840px}
.pricing>div{display:grid;grid-template-columns:1.2fr 1fr .8fr;gap:var(--space-4);padding:var(--space-4) 22px;align-items:baseline;border-top:1px solid var(--edge)}
.pricing>div:first-child{border-top:0;font:var(--type-label);font-weight:400;color:var(--ink-2)}
.pricing b{font:var(--type-question);color:var(--ink)} .pricing code{font:var(--type-figure);color:var(--ink)} .pricing small{font:var(--type-small);color:var(--ink-2)}
.builds{display:grid;gap:var(--space-30);padding-top:0}
.build{display:grid;gap:var(--space-6)}
.build .cap{display:grid;gap:10px;max-width:var(--measure-running)}
.points{padding:0;list-style:none;display:grid;gap:6px;font:var(--type-small);color:var(--ink-2);margin-top:4px}
.points li{display:flex;gap:12px;align-items:baseline}
.points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--light);box-shadow:0 0 8px rgba(255,210,122,.7);flex:none;transform:translateY(-2px)}
.tabs{margin-top:8px}
.country-panel[hidden]{display:none}
.country-panel .body{margin-top:28px}
.lines{margin-top:32px;display:grid;gap:8px}
.notes{margin-top:18px;display:grid;gap:4px}
/* footer */
footer{padding:var(--space-12) 0;font:var(--type-small);color:var(--ink-2)}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;align-items:center}
footer nav{display:flex;flex-wrap:wrap;gap:20px}
footer nav a{color:inherit;border:0;transition:color var(--duration-fast) ease} footer nav a:hover{color:var(--ink)}
@media (max-width:1100px){.links{gap:18px;font-size:13px}}
@media (max-width:960px){
  .links{display:none} .nav-right{display:flex}
  .nav.open .sheet{display:grid;gap:4px;padding:8px var(--page-padding-mobile) 20px;border-top:1px solid var(--edge)}
  .sheet>a{font:var(--type-question);color:var(--ink-2);text-decoration:none;border:0;padding:12px 0} .sheet>a[aria-current="page"]{color:var(--ink)}
  .sheet .chips{padding-top:12px;gap:var(--space-3)} .sheet .chip{font-size:15px;line-height:1.4;padding:11px 16px}
}
@media (max-width:860px){
  .wrap{padding:0 var(--page-padding-mobile)}
  section{padding:var(--section-padding-mobile) 0} .rule{left:var(--page-padding-mobile);right:var(--page-padding-mobile);bottom:calc(-1 * var(--sp,var(--section-padding-mobile)))} #faq,#problems{--sp:var(--section-padding-mobile)} #fit,#method{padding-top:var(--section-padding-mobile)}
  .hero{min-height:calc(100vh - var(--nav-height));min-height:calc(100svh - var(--nav-height));padding:72px 0 112px} .hero .wrap{grid-template-columns:1fr;gap:48px}
  .cursor{display:none}
  .beam{top:68%;height:480px;margin-top:-240px} .halo{height:300px;margin-top:-150px;filter:blur(28px)} .core{height:120px;margin-top:-60px;filter:blur(12px)} .pulse{height:190px;margin-top:-95px;filter:blur(14px)}
  .frame,.frame:hover{transform:none} .beam.second{display:none}
  .two,.contact-grid{grid-template-columns:1fr;gap:28px} .contact-grid .h2{margin-top:0} .two .head{position:static;grid-row:auto} .foot{grid-column:1}
  .panel{padding:24px 22px} .panel h3{font-size:26px}
  .steps{grid-template-columns:40px minmax(0,1fr);gap:0 16px} .step{grid-template-columns:1fr;gap:10px;padding-bottom:48px}
  .node{left:-56px;width:40px} .node span{width:32px;height:32px;font-size:11px} .step h3{font-size:26px} .step .side{justify-self:start}
  .thumbs{grid-template-columns:1fr;perspective:none} .thumb .thumb-frame,.thumb:hover .thumb-frame{transform:none} .thumb .cap{margin-top:var(--space-4)}
  .qa{padding:4px 20px} .lamp{font-size:17px;padding:16px 18px} .form{padding:22px}
  .page-head{padding-top:56px;padding-bottom:32px}
}
@media (max-width:640px){.pricing>div{grid-template-columns:1fr;gap:var(--space-1)} .pricing>div:first-child{display:none}}
@media (max-width:560px){.row2{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.beam,.beam>div{animation:none} .frame,.frame:hover,.thumb .thumb-frame{transform:none;transition:none}}