/* =========================================================
   Gifted: CogAT & NNAT Prep. Structure & components.

   Theme-agnostic: every colour, font, radius and shadow comes
   from a custom property defined by a theme file
   (theme-play.css / theme-oak.css). Load exactly one theme
   after this file.
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.62;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2.5px solid var(--focus);outline-offset:3px;border-radius:4px}
.cta :focus-visible,.privacy-band :focus-visible{outline-color:#fff}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:var(--display-weight);
  letter-spacing:var(--display-tracking);
  line-height:1.12;
  margin:0;
}
p{margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:24px}
.narrow{max-width:760px;margin-inline:auto}

/* ---------- Type scale ---------- */
h1{font-size:clamp(2.3rem,1.35rem + 3.9vw,3.9rem)}
h2{font-size:clamp(1.75rem,1.2rem + 2.1vw,2.7rem)}
h3{font-size:1.2rem;line-height:1.28}
.lede{color:var(--ink-2);font-size:1.08rem}

.kicker{
  display:inline-block;
  font-family:var(--font-body);
  font-size:.78rem;font-weight:700;
  letter-spacing:.11em;text-transform:uppercase;
  color:var(--brand-ink);
  margin-bottom:12px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  font-family:var(--font-body);font-weight:700;font-size:1rem;
  padding:.78em 1.5em;border-radius:var(--radius-pill);
  border:2px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .2s,border-color .2s;
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-brand)}
.btn--primary:hover{background:var(--brand-600);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{transform:translateY(-2px)}

/* Apple-style App Store button */
.appstore{
  display:inline-flex;align-items:center;gap:11px;
  background:#000;color:#fff;
  padding:10px 20px 10px 17px;
  border-radius:var(--radius-store);
  border:1px solid #000;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease);
  box-shadow:var(--shadow-sm);
}
.appstore:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.appstore svg{flex:none}
.appstore__text{display:flex;flex-direction:column;line-height:1.12;font-family:var(--font-body)}
.appstore__text small{font-size:.66rem;letter-spacing:.02em;opacity:.92}
.appstore__text strong{font-size:1.16rem;font-weight:600;letter-spacing:-.01em}
.appstore--light{background:#fff;color:#000;border-color:#fff}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--header-bg);
  backdrop-filter:saturate(1.6) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.015em}
.brand img{width:36px;height:36px;border-radius:10px}
.brand__name{font-family:var(--font-display);font-size:1.06rem;line-height:1.1}
.brand__name span{display:block;font-family:var(--font-body);font-size:.7rem;font-weight:600;letter-spacing:.05em;color:var(--muted);text-transform:uppercase}
.nav__links{display:flex;gap:26px;margin-left:auto;font-size:.95rem;font-weight:600}
.nav__links a{color:var(--ink-2);padding:6px 0;border-bottom:2px solid transparent}
.nav__links a:hover{color:var(--brand-ink);border-bottom-color:var(--brand)}
.nav__cta{padding:.55em 1.15em;font-size:.92rem}
.nav__toggle{
  display:none;margin-left:auto;width:44px;height:44px;
  background:none;border:0;cursor:pointer;padding:10px;
}
.nav__toggle span{display:block;height:2.5px;border-radius:2px;background:var(--ink);margin:4px 0;transition:.25s var(--ease)}
.mobile-menu{display:none;flex-direction:column;gap:6px;padding:12px 24px 22px;border-bottom:1px solid var(--line);background:var(--surface)}
.mobile-menu a{padding:10px 0;font-weight:600;border-bottom:1px solid var(--line)}
.mobile-menu a:last-child{border:0;margin-top:10px;text-align:center}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(40px,6vw,78px) 0 0;background:var(--hero-bg)}
.hero__grid{display:grid;grid-template-columns:1.02fr .98fr;gap:40px;align-items:center}
/* The eyebrow is a row of pills: audience first, then the proof claim, each on
   its own tint so they read as two separate facts rather than one long label. */
.eyebrow{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.pill{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--chip-bg);color:var(--brand-ink);
  border:1px solid var(--chip-line);
  padding:6px 14px;border-radius:var(--radius-pill);
  font-size:.83rem;font-weight:700;letter-spacing:.01em;
}
.pill--grade{background:var(--pill-grade-bg);color:var(--good-ink);border-color:var(--pill-grade-line)}
.pill--proof{background:var(--pill-proof-bg);color:var(--accent-ink);border-color:var(--pill-proof-line)}
.hero h1{margin:18px 0 0;max-width:15ch}
.hero__lede{margin-top:18px;font-size:1.12rem;color:var(--ink-2);max-width:48ch}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:30px}
.hero__meta{margin-top:20px;font-size:1rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 14px}
.hero__meta span{display:inline-flex;align-items:center;gap:6px}
.hero__meta svg{width:15px;height:15px;color:var(--good-ink);flex:none}

/* Platform row.  One combined device mark rather than a literal inventory of
   three: the words beside it name the devices precisely, so the icon only has
   to say "hardware, more than one kind".  Drawn in the same rounded 1.5px-ish
   stroke as the rest of the page's icons, so it belongs to the set.
   The phone overlaps the display, and the overlap is cut with a mask instead of
   an opaque fill, because this sits on the hero's gradient and a solid knockout
   would show as a patch. */
.hero__meta .dev-mark{width:auto;height:20px;flex:none;margin-right:3px;color:var(--ink-2)}

/* hero art: iPad behind, iPhone in front */
.device-stack{position:relative;min-height:440px;display:flex;justify-content:center;align-items:flex-end;padding-bottom:0}
.device{position:relative;z-index:2;filter:var(--device-shadow)}
.device--pad{width:min(70%,412px);transform:translate(-5%,-4%) rotate(2.6deg);z-index:1}
.device--phone{width:min(39%,228px);margin-left:-17%;transform:translate(10%,8%) rotate(-2.4deg)}
.device-stack:hover .device--pad{transform:translate(-8%,-6%) rotate(3.4deg)}
.device-stack:hover .device--phone{transform:translate(13%,5%) rotate(-3.2deg)}
.device--pad,.device--phone{transition:transform .5s var(--ease)}
.blob{position:absolute;border-radius:50%;filter:blur(52px);z-index:0;pointer-events:none}
.blob--a{width:340px;height:340px;background:var(--blob-a);top:-6%;left:-4%}
.blob--b{width:300px;height:300px;background:var(--blob-b);bottom:2%;right:-6%}

/* ---------- Stat strip ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;
  margin-top:clamp(34px,5vw,58px);
}
/* Three tiers per cell: a quiet category label, the value, then one line of
   detail.  Values are words as well as numerals, so the display line is fluid
   and balanced: "CogAT & NNAT" has to sit on one line beside "Free". */
.stat{
  background:var(--surface);padding:20px 16px;text-align:center;
  display:flex;flex-direction:column;justify-content:center;
}
.stat dt{
  font-size:.7rem;font-weight:800;line-height:1.2;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
}
.stat dd{margin:8px 0 0}
.stat dd b{
  display:block;
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(1.3rem,.95rem + .95vw,1.75rem);line-height:1.05;
  color:var(--brand-ink);letter-spacing:var(--display-tracking);text-wrap:balance;
}
.stat dd span{display:block;margin-top:6px;font-size:.84rem;color:var(--ink-2);text-wrap:balance}

/* ---------- Sections ---------- */
.section{padding:clamp(56px,7vw,92px) 0}
.section--alt{background:var(--bg-alt)}
.section__head{max-width:720px;margin-bottom:clamp(30px,4vw,46px)}
.section__head.center{margin-inline:auto;text-align:center}
.section__head p{margin-top:14px;color:var(--ink-2);font-size:1.06rem}

/* ---------- Icon tiles ---------- */
.tile{
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:var(--radius-sm);
  background:var(--brand-050);color:var(--brand-ink);flex:none;
}
.tile svg{width:24px;height:24px}
.tile--good{background:var(--good-050);color:var(--good-ink)}
.tile--warm{background:var(--warm-050);color:var(--warm-ink)}
.tile--accent{background:var(--accent-050);color:var(--accent-ink)}

/* ---------- Cards ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card h3{margin:16px 0 8px}
.card p{color:var(--ink-2);font-size:.96rem}

/* ---------- Tracks ---------- */
.tracks{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.track{display:flex;flex-direction:column}
.track__badge{
  align-self:flex-start;
  font-size:.72rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;
  padding:5px 11px;border-radius:var(--radius-pill);
  background:var(--brand-050);color:var(--brand-ink);
}
.track__badge--good{background:var(--good-050);color:var(--good-ink)}
.track__badge--accent{background:var(--accent-050);color:var(--accent-ink)}
.track h3{margin:14px 0 8px}
.track > p{color:var(--ink-2);font-size:.96rem}
.track__group{margin-top:18px}
.track__group h4{font-family:var(--font-body);font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:9px}
.chips{display:flex;flex-wrap:wrap;gap:7px;list-style:none;margin:0;padding:0}
.chips li{
  font-size:.82rem;font-weight:600;color:var(--ink-2);
  background:var(--chip-bg);border:1px solid var(--chip-line);
  padding:4px 10px;border-radius:var(--radius-pill);
}
.chips li i{font-style:normal;color:var(--muted);font-weight:600}
.track__foot{margin-top:auto;padding-top:20px;font-size:.86rem;color:var(--muted)}

/* ---------- Modes ----------
   Six columns so a five-card set lands as 3 + 2 instead of 3 + orphan. */
.modes{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.mode{grid-column:span 2}
.mode--half{grid-column:span 3}
.mode__meta{
  display:inline-block;margin-top:14px;font-size:.8rem;font-weight:700;
  color:var(--brand-ink);background:var(--brand-050);
  padding:3px 10px;border-radius:var(--radius-pill);
}

/* ---------- Feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);
  align-items:center;margin-bottom:clamp(44px,6vw,80px);
}
.feature-row:last-child{margin-bottom:0}
.feature-row--reverse .feature-row__art{order:-1}
.feature-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--radius-sm);
  background:var(--brand);color:#fff;
  font-family:var(--font-display);font-size:.98rem;font-weight:700;
  margin-bottom:16px;
}
.feature-row h3{font-size:clamp(1.35rem,1.1rem + .8vw,1.75rem);margin-bottom:12px}
.feature-row p{color:var(--ink-2)}
.ticks{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:11px}
.ticks li{position:relative;padding-left:30px;font-size:.96rem;color:var(--ink-2)}
.ticks li::before{
  content:"";position:absolute;left:0;top:.28em;
  width:19px;height:19px;border-radius:50%;
  background:var(--good-050) var(--tick-svg) center/12px no-repeat;
}
/* screenshots are pre-cropped to a flat content bottom, so no frame or crop box */
.shot{display:flex;justify-content:center}
.shot img{filter:var(--device-shadow)}

/* ---------- Parent grid ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ---------- Privacy band ---------- */
.privacy-band{
  background:var(--band-bg);color:var(--band-fg);
  padding:clamp(52px,7vw,88px) 0;position:relative;overflow:hidden;
}
.privacy-band h2{color:var(--band-fg)}
.privacy-band .kicker{color:var(--band-kicker)}
/* beats `.section__head p` on specificity, because the band is dark */
.privacy-band .section__head p{margin-top:16px;font-size:1.1rem;color:var(--band-muted);max-width:60ch}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:38px}
.privacy-item{
  background:var(--band-card);border:1px solid var(--band-line);
  border-radius:var(--radius);padding:22px;
}
.privacy-item h3{font-size:1.02rem;margin:14px 0 7px;color:var(--band-fg)}
.privacy-item p{font-size:.92rem;color:var(--band-muted)}
.privacy-item .tile{background:var(--band-tile);color:var(--band-tile-fg)}
.privacy-note{margin-top:26px;font-size:.94rem;color:var(--band-muted)}
.privacy-note a{color:var(--band-fg);text-decoration:underline;text-underline-offset:3px}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step}
.step{position:relative;padding-top:8px}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-family:var(--font-display);font-size:.9rem;font-weight:700;
  color:var(--brand-ink);background:var(--brand-050);
  padding:4px 10px;border-radius:var(--radius-pill);
}
.step h3{margin:14px 0 8px}
.step p{color:var(--ink-2);font-size:.96rem}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin-inline:auto}
.faq details{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);margin-bottom:12px;overflow:hidden;
}
.faq details[open]{border-color:var(--line-strong);box-shadow:var(--shadow-sm)}
.faq summary{
  list-style:none;cursor:pointer;padding:19px 54px 19px 22px;position:relative;
  font-family:var(--font-display);font-weight:var(--display-weight);font-size:1.05rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:22px;top:50%;
  width:11px;height:11px;margin-top:-6px;
  border-right:2.5px solid var(--muted);border-bottom:2.5px solid var(--muted);
  transform:rotate(45deg);transition:transform .25s var(--ease);
}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:-2px}
.faq .faq__body{padding:0 22px 20px;color:var(--ink-2);font-size:.98rem}
.faq .faq__body p + p{margin-top:11px}

/* ---------- CTA ---------- */
.cta{background:var(--cta-bg);color:var(--cta-fg);padding:clamp(56px,7vw,92px) 0;text-align:center;position:relative;overflow:hidden}
.cta h2{color:var(--cta-fg)}
.cta p{margin:16px auto 0;max-width:52ch;color:var(--cta-muted);font-size:1.06rem}
.cta__row{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:30px}
.cta__icon{width:78px;height:78px;border-radius:20px;margin:0 auto 22px;box-shadow:var(--shadow)}
.cta__fine{margin-top:22px;font-size:.88rem;color:var(--cta-muted)}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer-bg);color:var(--footer-fg);padding:56px 0 30px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:34px}
.footer__brand{display:flex;flex-direction:column;gap:12px;max-width:38ch}
.footer__brand .brand{color:var(--footer-fg)}
.footer__brand p{font-size:.92rem;color:var(--footer-muted)}
.footer__col h4{font-family:var(--font-body);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--footer-muted);margin-bottom:14px;font-weight:800}
.footer__col a{display:block;padding:5px 0;font-size:.94rem;color:var(--footer-fg);opacity:.86}
.footer__col a:hover{opacity:1;text-decoration:underline;text-underline-offset:3px}
.footer__legal{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--footer-line);
  font-size:.8rem;color:var(--footer-muted);line-height:1.6;
}
.footer__legal p + p{margin-top:10px}
.footer__bar{
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  margin-top:18px;font-size:.84rem;color:var(--footer-muted);
}

/* ---------- Legal / document pages ---------- */
.page-hero{padding:clamp(38px,5vw,64px) 0 0;background:var(--hero-bg)}
/* block, so the .kicker below it (an inline-block <p>) starts its own line */
.backlink{display:block;width:max-content;max-width:100%;font-size:.9rem;font-weight:600;color:var(--brand-ink);margin-bottom:14px}
.backlink:hover{text-decoration:underline;text-underline-offset:3px}
.doc{padding:clamp(30px,4vw,46px) 0 clamp(56px,7vw,88px)}
.doc__inner{max-width:760px;margin-inline:auto}
.doc__updated{font-size:.88rem;color:var(--muted);margin-bottom:26px}
.doc h2{font-size:1.45rem;margin:38px 0 12px}
.doc h3{font-size:1.08rem;margin:24px 0 8px}
.doc p,.doc li{color:var(--ink-2);font-size:1rem}
.doc p + p{margin-top:12px}
.doc ul,.doc ol{margin:12px 0 0;padding-left:22px;display:grid;gap:8px}
.doc a{color:var(--brand-ink);text-decoration:underline;text-underline-offset:3px}
.doc__toc{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 24px;margin-bottom:10px;
}
.doc__toc h2{font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-family:var(--font-body);margin:0 0 12px}
.doc__toc ol{columns:2;column-gap:26px;padding-left:20px}
.callout{
  background:var(--brand-050);border:1px solid var(--chip-line);
  border-radius:var(--radius);padding:22px 24px;margin:26px 0;
}
.callout h3{margin-top:0}
.callout p{color:var(--ink-2)}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero__grid{grid-template-columns:1fr;gap:12px}
  .hero h1{max-width:none}
  .device-stack{min-height:0;margin-top:8px}
  .device--pad{width:min(66%,380px)}
  .device--phone{width:min(38%,220px)}
  .tracks,.steps,.grid-3{grid-template-columns:1fr 1fr}
  .modes{grid-template-columns:1fr 1fr}
  .mode,.mode--half{grid-column:span 1}
  .privacy-grid,.grid-4{grid-template-columns:1fr 1fr}
  .feature-row{grid-template-columns:1fr;gap:26px}
  .feature-row--reverse .feature-row__art{order:0}
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:span 2}
}
@media (max-width:720px){
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:block}
  .mobile-menu{display:flex}
  .mobile-menu[hidden]{display:none}   /* author rule beats the UA [hidden] */
  .stats{grid-template-columns:1fr 1fr}
  .tracks,.modes,.steps,.grid-2,.grid-3{grid-template-columns:1fr}
  .privacy-grid,.grid-4{grid-template-columns:1fr}
  .doc__toc ol{columns:1}
  .footer__grid{grid-template-columns:1fr}
  .footer__brand{grid-column:span 1}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}