/* Mathteroids site. Every color below is copied from the iOS app source (Mac ~/Mathteroids @ c7185ae).
   Never add brown, amber or tan. */
:root{
  --space:#050812;      /* Assets.xcassets/LaunchBackground.colorset (0.02,0.03,0.07) */
  --accent:#5CE0FF;     /* SpaceThemePack.swift:9 accent (0.36,0.88,1); KidHomeView.swift:29 subtitle */
  --tint:#38C7FA;       /* Assets.xcassets/AccentColor.colorset (0.22,0.78,0.98) */
  --console:rgba(13,26,36,.85); /* ConsoleChrome.swift:12 ConsoleButtonStyle fill (0.05,0.1,0.14) @0.85 */
  --console-edge:rgba(92,224,255,.75); /* ConsoleChrome.swift:13 stroke accent @0.75, 1.4pt */
  --wm-c1:#9EF0FF; --wm-c2:#339EF2;   /* ConsoleChrome.swift:44 TitleLogo "MATH" cyan gradient */
  --wm-e1:#FFD16B; --wm-e2:#E05214;   /* ConsoleChrome.swift:52 TitleLogo "TEROIDS" ember gradient */
  --wm-depth:#0D121C;                 /* ConsoleChrome.swift:62 extrusion layers */
  --wm-glow:rgba(64,179,255,.45);     /* ConsoleChrome.swift:70 glow (0.25,0.7,1) @0.45 */
  --bg-light:#F2F7FC;   /* SettingsView.swift:204 Light.bg (0.95,0.97,0.99) */
  --navy:#142145;       /* SettingsView.swift:205 Light.navy (0.08,0.13,0.27) */
  --blue:#1F6BD9;       /* SettingsView.swift:206 Light.blue (0.12,0.42,0.85), LightButtonStyle primary */
  --green:#1A8C4D;      /* SettingsView.swift:207 Light.green (0.10,0.55,0.30) */
  --card:#FFFFFF;       /* Light.card = Color.white */
  --rounded: ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; /* .system(design: .rounded) */
  --text: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, "Segoe UI", Roboto, sans-serif; /* .system() */
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;background:var(--space)}
body{margin:0;color:#fff;font:17px/1.6 var(--text);
  background:radial-gradient(120% 60% at 50% 0%, rgba(51,158,242,.22), transparent 60%),
             radial-gradient(80% 50% at 85% 35%, rgba(92,224,255,.10), transparent 60%), var(--space);
  background-attachment:scroll;min-height:100vh}
a{color:var(--accent)}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}

/* wordmark = TitleLogo: black rounded, tracking -0.02em, 5 dark copies offset 0.045em, cyan glow */
.wm{position:relative;display:inline-block;font:900 1em/1 var(--rounded);letter-spacing:-.02em;white-space:nowrap;
  filter:drop-shadow(0 0 .28em var(--wm-glow))}
.wm::before{content:attr(data-text);position:absolute;left:0;top:0;color:var(--wm-depth);z-index:0;
  text-shadow:0 .045em 0 var(--wm-depth),0 .09em 0 var(--wm-depth),0 .135em 0 var(--wm-depth),0 .18em 0 var(--wm-depth),0 .225em 0 var(--wm-depth)}
.wm span{position:relative;z-index:1;-webkit-background-clip:text;background-clip:text;color:transparent}
.wm-c{background-image:linear-gradient(180deg,var(--wm-c1),var(--wm-c2))}
.wm-e{background-image:linear-gradient(180deg,var(--wm-e1),var(--wm-e2))}
.wm-sm{font-size:22px}
.wm-xl{font-size:clamp(44px,12vw,92px);margin-bottom:.2em}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:1120px;margin:0 auto;padding:14px 18px;
  padding-top:max(14px,env(safe-area-inset-top))}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{border-radius:10px}
.top nav{display:flex;gap:10px}
/* ConsoleButtonStyle: heavy rounded 16, white, pad 18x10, radius 10 */
.console{display:inline-block;font:800 16px/1.2 var(--rounded);color:#fff;text-decoration:none;padding:10px 18px;border-radius:10px;
  background:var(--console);border:1.4px solid var(--console-edge);letter-spacing:.02em}
.console:active{background:rgba(13,26,36,.6)}
.top .console{font-size:14px;padding:8px 14px}
/* LightButtonStyle: bold rounded 18, pad 26, minHeight 50, radius 12, Light.blue fill */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 26px;border-radius:12px;background:var(--blue);
  color:#fff;font:700 18px/1.2 var(--rounded);text-decoration:none}
.btn.alt{background:#fff;color:var(--navy);border:1.2px solid rgba(20,33,69,.25)}
.btn:active,.badge:active{opacity:.75}
.badge{display:inline-block;line-height:0}
.badge img{height:60px;width:auto}
.badge.sm img{height:48px}

main{max-width:1120px;margin:0 auto;padding:0 18px}
main.narrow{max-width:760px}
.center{text-align:center}

/* hero */
.hero{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;padding:28px 0 40px;text-align:center}
.hero h1{margin:0;display:flex;flex-direction:column;align-items:center;gap:14px}
.sub{font:800 13px/1 var(--rounded);color:var(--accent);letter-spacing:.42em;margin-right:-.42em} /* KidHomeView.swift:28-29 */
.lede{font-size:1.15rem;color:#D7F6FF; /* SpaceThemePack.swift:29 sector star color */ max-width:34em;margin:22px auto 22px}
.price{color:rgba(255,255,255,.72);font:600 14px/1.4 var(--rounded);margin:14px 0 0}
.hero-art{position:relative;display:flex;flex-direction:column;align-items:center;gap:14px}
.phone{display:block;width:100%;border-radius:22px;border:1.4px solid var(--console-edge);background:#000;
  box-shadow:0 0 0 6px rgba(13,26,36,.85),0 18px 50px rgba(0,0,0,.6),0 0 40px rgba(64,179,255,.25)}
.hero-phone{width:min(68vw,300px)}
.ship{order:2;width:140px;filter:drop-shadow(0 0 18px rgba(92,224,255,.45))}

.sec{font:900 clamp(22px,5vw,30px)/1.1 var(--rounded);letter-spacing:.06em;text-align:center;margin:56px 0 6px;color:#fff}
.sec-sub{text-align:center;color:rgba(255,255,255,.75);margin:0 0 22px}
.page-h{font:900 clamp(30px,8vw,44px)/1.1 var(--rounded);letter-spacing:.06em;text-align:center;margin:28px 0 6px}

.shots{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.shots figure{margin:0}
.shots figcaption{text-align:center;font:800 15px/1.2 var(--rounded);letter-spacing:.04em;margin-top:12px;color:var(--accent);text-transform:uppercase}
.shots .phone{border-radius:18px;box-shadow:0 0 0 4px rgba(13,26,36,.85),0 10px 30px rgba(0,0,0,.5)}

.card{background:var(--card);color:var(--navy);border-radius:16px;padding:18px 18px}
.cards{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:14px}
.cards h3{font:800 18px/1.25 var(--rounded);margin:0 0 6px;color:var(--navy)}
.cards p{margin:0;color:rgba(20,33,69,.8);font-size:15.5px;line-height:1.5}
.fine{margin:56px auto 0;max-width:760px}
.fine h2{font:900 22px/1.2 var(--rounded);margin:0 0 12px}
.checks{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:8px}
.checks li{display:flex;gap:10px;align-items:center;font-weight:600}
.ok{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--green);color:#fff;font-size:13px;flex:none}
.pz{margin:14px 0 0;color:rgba(20,33,69,.8);font-size:15px}

.postlist{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:12px}
.postlist a{display:block;text-decoration:none;background:var(--console);border:1.4px solid rgba(92,224,255,.45);border-radius:12px;padding:14px 16px;color:#fff}
.postlist a:hover{border-color:var(--accent)}
.postlist .date{display:block;font:800 12px/1.2 var(--rounded);letter-spacing:.08em;color:var(--accent);text-transform:uppercase;margin-bottom:4px}
.postlist .t{display:block;font:800 18px/1.3 var(--rounded)}
.postlist .d{display:block;color:rgba(255,255,255,.72);font-size:15px;margin-top:6px;line-height:1.45}

.final{text-align:center;padding:56px 0 40px}
.final img{border-radius:22px}
.final-t{font:900 22px/1.3 var(--rounded);margin:14px 0 18px}

/* article */
.crumbs{font:700 14px/1 var(--rounded);margin:18px 0 14px;color:rgba(255,255,255,.6)}
.crumbs a{color:var(--accent);text-decoration:none}
.post{padding:24px 20px 28px;font-size:18px;line-height:1.7}
.post h1{font:900 clamp(28px,6.5vw,40px)/1.15 var(--rounded);margin:0 0 10px;color:var(--navy)}
.post .meta{font:700 14px/1.3 var(--rounded);color:rgba(20,33,69,.6);margin:0 0 18px}
.post h2{font:800 22px/1.3 var(--rounded);margin:30px 0 8px;color:var(--navy)}
.post h3{font:800 19px/1.3 var(--rounded);margin:22px 0 6px}
.post a{color:var(--blue)}
.post section>p:first-child{margin-top:0}
.post ul,.post ol{padding-left:1.3em}
.post blockquote{margin:18px 0;padding:4px 16px;border-left:4px solid var(--tint);color:rgba(20,33,69,.85)}
.appcard{display:grid;grid-template-columns:64px 1fr;gap:14px;align-items:center;margin:22px 0 0;padding:16px;border-radius:16px;
  background:var(--console);border:1.4px solid var(--console-edge)}
.appcard img{border-radius:14px}
.appcard .t{font:900 18px/1.2 var(--rounded);margin:0}
.appcard .d{margin:4px 0 0;color:rgba(255,255,255,.75);font-size:15px;line-height:1.4}
.appcard .badge{grid-column:1/-1;justify-self:start}
.related .sec{font-size:20px;margin-top:40px}

.foot{border-top:1px solid rgba(92,224,255,.2);margin-top:56px;padding:26px 18px 40px;text-align:center;color:rgba(255,255,255,.6);font-size:14px}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;margin-bottom:10px}
.foot nav a{color:#fff;font:700 15px/1.6 var(--rounded);text-decoration:none}
.foot p{margin:6px auto;max-width:640px}
.foot .small{font-size:12px;color:rgba(255,255,255,.45)}

@media (max-width:560px){.hide-xs{display:none}}
@media (max-width:420px){.ship{width:120px}}
@media (min-width:700px){
  .shots{grid-template-columns:repeat(4,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .checks{grid-template-columns:repeat(2,1fr)}
  .appcard{grid-template-columns:64px 1fr auto}.appcard .badge{grid-column:auto}
  .post{padding:36px 44px 40px}
}
@media (min-width:980px){
  .hero{grid-template-columns:minmax(0,1fr) auto;text-align:left;padding:48px 0 30px}
  .hero h1{align-items:flex-start}
  .lede{margin-left:0}
  .cards{grid-template-columns:repeat(3,1fr)}
  .hero-art{flex-direction:row;align-items:flex-end;justify-content:center;gap:22px}
  .ship{order:0;width:170px;margin-bottom:24px}
  .fine{max-width:900px}
}
@media (prefers-reduced-motion:no-preference){.ship{animation:hover 4s ease-in-out infinite}}
@keyframes hover{50%{transform:translateY(-8px)}}
.latest .postlist{max-width:760px;margin-left:auto;margin-right:auto}
@media (min-width:980px){.shots{max-width:980px;margin:0 auto}}
/* art swap point: body.aurora is set by build.py when art/backdrop-aurora.png exists (ConsoleBackground: art .55, blur 6, black gradient) */
body.aurora::before{content:"";position:absolute;inset:0 0 auto 0;height:1100px;z-index:-1;pointer-events:none;
  background:url(/img/backdrop-aurora-1200.webp) center top/cover no-repeat;opacity:.55;filter:blur(6px)}
@media (min-width:1200px){body.aurora::before{background-image:url(/img/backdrop-aurora-2400.webp)}}
body.aurora::after{content:"";position:absolute;inset:0 0 auto 0;height:1100px;z-index:-1;pointer-events:none;
  background:linear-gradient(rgba(0,0,0,.45),rgba(0,0,0,.10) 50%,var(--space))}
body{position:relative;z-index:0}
.rock{position:absolute;z-index:1;pointer-events:none}
/* rocks sit in the gutters beside the hero phone (never over the phone, ship, text or badge) */
.hero-art{--pw:min(68vw,300px)}
.rock.r1{--rw:36px;width:var(--rw);top:6%;left:calc(50% - var(--pw)/2 - var(--rw) - 11px)}
.rock.r2{--rw:32px;width:var(--rw);top:36%;right:calc(50% - var(--pw)/2 - var(--rw) - 11px)}
.rock.r3{--rw:38px;width:var(--rw);top:64%;left:calc(50% - var(--pw)/2 - var(--rw) - 10px)}
@media (min-width:700px){
  .rock.r1{--rw:84px;left:calc(50% - var(--pw)/2 - var(--rw) - 40px)}
  .rock.r2{--rw:56px;right:calc(50% - var(--pw)/2 - var(--rw) - 48px)}
  .rock.r3{--rw:110px;left:calc(50% - var(--pw)/2 - var(--rw) - 70px)}
}
@media (min-width:980px){
  .rock.r1{--rw:96px;top:4%;left:12px;right:auto}
  .rock.r2{--rw:56px;top:30%;left:112px;right:auto}
  .rock.r3{--rw:64px;top:52%;left:24px;right:auto}
}
.post a{overflow-wrap:anywhere}
h1,h2,h3,.lede,.price,.sec-sub,.final-t{text-wrap:balance}
.post p{text-wrap:pretty}
.post .inline-badge{display:block;margin:12px 0 4px;line-height:0}
.post .inline-badge img{height:48px;width:auto}
.console{white-space:nowrap}
.console:hover{border-color:var(--accent);background:rgba(13,26,36,.95);box-shadow:0 0 12px rgba(92,224,255,.35)}
.btn:hover{filter:brightness(1.08);box-shadow:0 0 0 2px rgba(92,224,255,.55)}
.price span{display:block}
.shots a{display:block;border-radius:18px}
body.aurora::before{-webkit-mask-image:linear-gradient(#000 45%,transparent 92%);mask-image:linear-gradient(#000 45%,transparent 92%)}
/* support page + footer tidy (Nov 13) */
.support>section:first-child>h2:first-child{margin-top:0}
@media (max-width:420px){.foot nav{gap:8px 15px}.foot nav a{font-size:14.5px}}