:root{
  color-scheme: light;
  --bg:#E9EBEF; --bg-pattern:rgba(28,28,30,.05);
  --panel:#FFFFFF; --panel-edge:#D4D7DD;
  --ink:#1C1C1E; --ink-soft:#4A4D55;
  --slot:#F3F4F7; --slot-edge:#A9AEB8;
  --cyan:#0A9FD0; --cyan-glow:rgba(10,159,208,.35);
  --red:#E5262B; --yellow:#FFC61A; --green:#4CB81F; --orange:#FF7A1A; --purple:#8A3BE8; --blue:#1EA7F0;
  --night:#1C1C1E; --night-panel:#2A2A2D; --night-ink:#F2F3F5; --night-soft:#B9BCC4; --night-cyan:#33D2FF;
  --font-display:"Lilita One","Arial Rounded MT Bold","Trebuchet MS",system-ui,sans-serif;
  --font-body:"Nunito","Segoe UI",system-ui,-apple-system,sans-serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme: dark;
    --bg:#1C1C1E; --bg-pattern:rgba(255,255,255,.035);
    --panel:#2A2A2D; --panel-edge:#3C3C41;
    --ink:#F2F3F5; --ink-soft:#B9BCC4;
    --slot:#232326; --slot-edge:#55585F;
    --cyan:#33D2FF; --cyan-glow:rgba(51,210,255,.35);
  }
}
:root[data-theme="dark"]{
  color-scheme: dark;
  --bg:#1C1C1E; --bg-pattern:rgba(255,255,255,.035);
  --panel:#2A2A2D; --panel-edge:#3C3C41;
  --ink:#F2F3F5; --ink-soft:#B9BCC4;
  --slot:#232326; --slot-edge:#55585F;
  --cyan:#33D2FF; --cyan-glow:rgba(51,210,255,.35);
}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 72px);scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
*,*::before,*::after{box-sizing:inherit}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-body);font-weight:500;font-size:1.0625rem;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--night)}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--night-cyan);outline-offset:3px;border-radius:6px}

/* gear pattern used on dark and light grounds */
.gears{
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220' viewBox='0 0 220 220'%3E%3Cg fill='none' stroke='%23fff' stroke-opacity='.06'%3E%3Ccircle cx='52' cy='60' r='26' stroke-width='14' stroke-dasharray='9 8'/%3E%3Ccircle cx='52' cy='60' r='18' stroke-width='6'/%3E%3Ccircle cx='168' cy='160' r='18' stroke-width='10' stroke-dasharray='7 6'/%3E%3Ccircle cx='168' cy='160' r='12' stroke-width='5'/%3E%3Cpath d='M150 40l-14 26h12l-8 22 22-30h-12l8-18z' stroke-width='5' stroke-linejoin='round'/%3E%3Ccircle cx='60' cy='172' r='9' stroke-width='5'/%3E%3C/g%3E%3C/svg%3E");
}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}

/* header */
.top{
  position:sticky;top:env(safe-area-inset-top,0px);z-index:20;
  background:rgba(28,28,30,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.top img{height:42px;width:auto}
.top nav{display:flex;gap:6px}
.top nav a{
  color:var(--night-ink);text-decoration:none;font-weight:800;font-size:.95rem;
  padding:8px 12px;border-radius:999px;
}
.top nav a:hover{background:rgba(255,255,255,.1)}
@media (max-width:640px){.top nav a.opt{display:none}.top nav a{padding:8px 9px;font-size:.9rem}}

/* hero */
.hero{background-color:var(--night);color:var(--night-ink);overflow:hidden;position:relative}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:120px;
  background:linear-gradient(to bottom,rgba(28,28,30,0),var(--night));pointer-events:none;
}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:24px;padding:56px 0 0}
.hero-logo{width:min(470px,100%);filter:drop-shadow(0 6px 0 rgba(0,0,0,.35))}
.hero h1{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(1.9rem,1.2rem + 2.4vw,2.9rem);line-height:1.08;
  margin:28px 0 14px;max-width:16ch;letter-spacing:.005em;
}
.hero p.lede{color:var(--night-soft);font-size:1.15rem;max-width:44ch;margin:0 0 26px}
.facts{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 30px;padding:0;list-style:none}
.facts li{
  background:#fff;color:#1C1C1E;border-radius:10px;padding:6px 12px 5px;
  font-family:var(--font-display);font-size:1.15rem;line-height:1.1;text-align:center;
  box-shadow:0 0 0 3px #1C1C1E,0 0 0 5px rgba(255,255,255,.85);
}
.facts small{display:block;font-family:var(--font-body);font-weight:800;font-size:.7rem;color:#4A4D55}
.btns{display:flex;flex-wrap:wrap;gap:12px;padding-bottom:56px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-display);font-size:1.15rem;letter-spacing:.01em;
  padding:13px 22px;border-radius:14px;text-decoration:none;border:0;cursor:pointer;
  transition:transform .12s ease, box-shadow .12s ease;
}
.btn-main{background:var(--night-cyan);color:#06222C;box-shadow:0 5px 0 #0A7FA6}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 7px 0 #0A7FA6}
.btn-main:active{transform:translateY(3px);box-shadow:0 2px 0 #0A7FA6}
.btn-ghost{background:transparent;color:var(--night-ink);box-shadow:inset 0 0 0 2px rgba(255,255,255,.35)}
.btn-ghost:hover{box-shadow:inset 0 0 0 2px #fff}
.hero-robot{position:relative;align-self:end;justify-self:center;width:min(440px,100%)}
.hero-robot img{width:100%;animation:boot 1.1s cubic-bezier(.2,.9,.3,1.3) both}
.hero-robot::before{
  content:"";position:absolute;left:50%;top:22%;width:70%;aspect-ratio:1;transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(51,210,255,.28),rgba(51,210,255,0) 65%);
}
@keyframes boot{from{transform:translateY(60px);opacity:0}to{transform:none;opacity:1}}
@media (prefers-reduced-motion: reduce){.hero-robot img{animation:none}}
@media (max-width:820px){
  .hero .wrap{grid-template-columns:1fr;padding-top:36px;text-align:left}
  .hero-robot{width:min(330px,80%);order:3;margin-top:-10px}
  .btns{padding-bottom:28px}
}

/* sections */
section{padding:84px 0}
.sec-head{max-width:62ch;margin-bottom:36px}
h2{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(1.9rem,1.3rem + 2vw,2.7rem);line-height:1.1;margin:0 0 12px;
}
h3{font-family:var(--font-display);font-weight:400;font-size:1.45rem;line-height:1.15;margin:0 0 8px}
.sec-head p{margin:0;color:var(--ink-soft);font-size:1.125rem}

/* builder */
#build{background-color:var(--bg)}
.builder{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:start}
.board{
  background:var(--night);border-radius:28px;padding:22px;
  box-shadow:0 0 0 2px rgba(255,255,255,.08) inset,0 0 0 4px var(--panel-edge);
  display:grid;gap:12px;
  grid-template-columns:repeat(3,minmax(0,1fr));
  grid-template-areas:". head ." "rarm body larm" ". legs battery";
}
.slot{
  aspect-ratio:538/754;border-radius:10%/7%;position:relative;
  border:2px dashed #55585F;background:rgba(255,255,255,.03);
  display:grid;place-items:center;text-align:center;color:#8C9099;
  font-family:var(--font-display);font-size:clamp(.8rem,.6rem + .6vw,1.05rem);line-height:1.1;padding:8px;
}
.slot.filled{border-color:transparent;background:none}
.slot.filled > span{display:none}
.slot[data-part="head"]{grid-area:head}
.slot[data-part="right-arm"]{grid-area:rarm}
.slot[data-part="body"]{grid-area:body}
.slot[data-part="left-arm"]{grid-area:larm}
.slot[data-part="legs"]{grid-area:legs}
.slot[data-part="battery"]{grid-area:battery}
.slot .card{position:absolute;inset:0;width:100%;height:100%}
.tray-wrap{display:flex;flex-direction:column;gap:16px}
.tray{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;min-height:40px}
.card{
  display:block;padding:0;border:0;background:none;cursor:pointer;
  border-radius:10%/7%;overflow:hidden;aspect-ratio:538/754;
  box-shadow:0 6px 14px rgba(0,0,0,.25);
  transition:transform .15s ease;
}
.card img{width:100%;height:100%;object-fit:cover}
.tray .card:hover{transform:translateY(-6px) rotate(-1.5deg)}
.slot .card{cursor:default;box-shadow:0 0 18px var(--cyan-glow)}
.status{
  background:var(--panel);border:2px solid var(--panel-edge);border-radius:18px;padding:18px 20px;
  font-weight:700;
}
.status strong{font-family:var(--font-display);font-weight:400;font-size:1.35rem;display:block;line-height:1.15;margin-bottom:4px}
.status .count{color:var(--cyan)}
.status button{margin-top:12px}
.btn-dark{background:var(--ink);color:var(--bg);box-shadow:0 4px 0 rgba(0,0,0,.35);font-size:1.05rem;padding:10px 18px}
.btn-dark:active{transform:translateY(3px);box-shadow:0 1px 0 rgba(0,0,0,.35)}
.board.done{animation:power .9s ease}
@keyframes power{0%{box-shadow:0 0 0 2px rgba(255,255,255,.08) inset,0 0 0 4px var(--panel-edge)}35%{box-shadow:0 0 0 2px rgba(255,255,255,.08) inset,0 0 0 4px var(--night-cyan),0 0 60px 10px rgba(51,210,255,.55)}100%{box-shadow:0 0 0 2px rgba(255,255,255,.08) inset,0 0 0 4px var(--night-cyan),0 0 30px 2px rgba(51,210,255,.35)}}
@media (prefers-reduced-motion: reduce){.board.done{animation:none;box-shadow:0 0 0 4px var(--night-cyan)}.tray .card:hover{transform:none}}
@media (max-width:860px){
  .builder{grid-template-columns:1fr;gap:22px}
  .board{padding:14px;gap:8px;border-radius:22px}
  .tray{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}
  .tray-wrap{order:-1}
}

/* rules */
#rules{background-color:var(--night);color:var(--night-ink)}
#rules .sec-head p{color:var(--night-soft)}
.rules-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:18px}
.panel{background:var(--night-panel);border-radius:20px;padding:24px 26px;border:1px solid rgba(255,255,255,.08)}
.panel p{margin:0;color:var(--night-soft)}
.p-setup{grid-column:span 5}
.p-turn{grid-column:span 7;grid-row:span 2}
.p-goal{grid-column:span 5}
.p-know{grid-column:span 12}
.tag{
  display:inline-block;font-family:var(--font-display);font-size:1.15rem;line-height:1;
  padding:7px 12px 6px;border-radius:8px;color:#1C1C1E;margin-bottom:14px;
}
.tag.c{background:var(--night-cyan)} .tag.p{background:#B98BFF} .tag.y{background:var(--yellow)} .tag.r{background:#FF6B6E} .tag.g{background:#7EDC4E}
.steps{list-style:none;margin:0;padding:0;counter-reset:s}
.steps li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start;padding:12px 0;border-top:1px solid rgba(255,255,255,.08)}
.steps li:first-child{border-top:0;padding-top:0}
.steps li::before{
  content:counter(s);display:grid;place-items:center;width:40px;height:40px;border-radius:50%;
  background:#fff;color:#1C1C1E;font-family:var(--font-display);font-size:1.3rem;
}
.steps b{display:block;font-size:1.1rem;color:var(--night-ink)}
.steps span{color:var(--night-soft)}
.needs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-top:16px}
.needs img{border-radius:10%/7%}
.know{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 30px;margin:0;padding:0;list-style:none}
.know li{position:relative;padding-left:22px;color:var(--night-soft)}
.know li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;border-radius:50%;background:var(--dot,var(--night-cyan))}
@media (max-width:860px){
  .p-setup,.p-turn,.p-goal,.p-know{grid-column:1 / -1;grid-row:auto}
  .know{grid-template-columns:1fr}
}

/* action cards */
.actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px 28px}
.action{display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:center}
.action img{border-radius:10%/7%;box-shadow:0 8px 18px rgba(0,0,0,.22)}
.action p{margin:0;color:var(--ink-soft)}
.action .tip{display:block;margin-top:8px;font-weight:800;color:var(--ink);font-size:.95rem}
@media (max-width:980px){.actions{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.actions{grid-template-columns:1fr}.action{grid-template-columns:118px 1fr}}

/* creator */
#creator{background-color:var(--bg)}
.creator{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:48px;align-items:center}
.photo{position:relative;max-width:400px;justify-self:center;width:100%}
.photo img.kid{border-radius:28px;border:6px solid #fff;box-shadow:0 0 0 3px var(--ink),0 18px 40px rgba(0,0,0,.25);aspect-ratio:683/860;object-fit:cover;object-position:top}
.photo .bolt{position:absolute;width:64px;height:auto;filter:drop-shadow(0 2px 0 rgba(0,0,0,.4))}
.photo .bolt.l{left:-26px;top:16%;transform:rotate(-12deg)}
.photo .bolt.r{right:-26px;top:9%;transform:scaleX(-1) rotate(-12deg)}
.note{background:var(--panel);border:2px solid var(--panel-edge);border-radius:28px;padding:34px 36px}
.note h2{display:flex;align-items:center;gap:12px}
.note p{max-width:58ch;font-size:1.15rem;margin:0 0 14px}
.note .sig{font-family:var(--font-display);font-size:1.3rem;margin-top:18px;color:var(--cyan)}
.note .sig small{display:block;font-family:var(--font-body);font-weight:700;font-size:.9rem;color:var(--ink-soft)}
@media (max-width:820px){.creator{grid-template-columns:1fr;gap:34px}.note{padding:26px 22px}.photo{max-width:300px}}

/* footer */
footer{background-color:var(--night);color:var(--night-soft);padding:46px 0 40px;font-size:.95rem}
footer .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
footer img{height:56px;width:auto}
footer p{margin:0}

/* contact page */
.top nav a[aria-current="page"]{background:rgba(255,255,255,.14)}
.page-head{background-color:var(--night);color:var(--night-ink);padding:56px 0 64px}
.page-head .wrap{display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px}
.page-head h1{font-family:var(--font-display);font-weight:400;font-size:clamp(2.2rem,1.5rem + 2.6vw,3.2rem);line-height:1.05;margin:0 0 12px}
.page-head p{margin:0;color:var(--night-soft);font-size:1.15rem;max-width:48ch}
.page-head img{width:150px;height:auto;filter:drop-shadow(0 0 30px rgba(51,210,255,.35))}
.contact{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:40px;align-items:start}
.contact aside{display:flex;flex-direction:column;gap:16px}
.contact aside .panel-lite{background:var(--panel);border:2px solid var(--panel-edge);border-radius:20px;padding:22px 24px}
.contact aside h2{font-size:1.45rem;margin:0 0 6px}
.contact aside p{margin:0;color:var(--ink-soft)}
.contact aside a{color:var(--cyan);font-weight:800;word-break:break-word}
.form{background:var(--panel);border:2px solid var(--panel-edge);border-radius:28px;padding:32px 32px 28px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.field label{font-weight:800;font-size:1rem}
.field .hint{font-weight:600;color:var(--ink-soft);font-size:.9rem}
.form input[type=text],.form input[type=email],.form select,.form textarea{
  font:inherit;font-weight:600;color:var(--ink);background:var(--slot);
  border:2px solid var(--slot-edge);border-radius:12px;padding:12px 14px;width:100%;
}
.form textarea{min-height:170px;resize:vertical;line-height:1.5}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 4px var(--cyan-glow)}
.form input:user-invalid,.form textarea:user-invalid{border-color:var(--red)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.grownup{display:flex;gap:12px;align-items:flex-start;background:var(--slot);border-radius:14px;padding:12px 14px;margin:4px 0 20px;font-size:.95rem;color:var(--ink-soft);font-weight:600}
.grownup img{width:34px;height:auto;flex:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form .btn-main{font-size:1.2rem;padding:14px 26px}
.form .after{margin:14px 0 0;color:var(--ink-soft);font-size:.92rem}
.thanks{text-align:center;padding:90px 0 100px}
.thanks img{width:min(260px,60%);margin:0 auto 18px}
.thanks h1{font-family:var(--font-display);font-weight:400;font-size:clamp(2.2rem,1.5rem + 2.6vw,3.2rem);margin:0 0 10px}
.thanks p{color:var(--ink-soft);font-size:1.15rem;margin:0 auto 28px;max-width:44ch}
@media (max-width:820px){
  .contact{grid-template-columns:1fr;gap:22px}
  .contact aside{order:2}
  .form{padding:24px 20px}
  .two{grid-template-columns:1fr}
  .page-head img{width:96px}
  .page-head{padding:38px 0 44px}
}