/* ==========================================================================
   Aptenna — design tokens
   Brand: cognition/insight. Deep indigo + warm amber, serif display / plex sans body.
   ========================================================================== */

:root{
  --ink:        #14171F;
  --ink-soft:   #4A4F5E;
  --paper:      #F7F8FA;
  --panel:      #FFFFFF;
  --line:       #DCDFE6;
  --line-soft:  #E9EBF0;
  --indigo:     #2B3A67;
  --indigo-deep:#1B2647;
  --amber:      #E0972E;
  --amber-soft: #FBE7C6;
  --teal:       #3C8C6E;
  --teal-soft:  #DCEEE6;
  --rust:       #B4482F;

  --radius-sm: 4px;
  --radius-md: 6px;
  --container: 1120px;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*, *::before, *::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--indigo-deep);
  line-height:1.15;
  margin:0 0 .5em;
  font-weight:600;
}

h1{ font-size:clamp(2rem, 4.4vw, 3.4rem); font-weight:500; }
h2{ font-size:clamp(1.5rem, 2.6vw, 2.1rem); }
h3{ font-size:1.25rem; }

p{ margin:0 0 1em; color:var(--ink-soft); max-width:68ch; }

a{ color:var(--indigo); }

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 1.25rem;
}

/* ---------- header ---------- */
.site-header{
  border-bottom:1px solid var(--line);
  background:var(--paper);
  position:sticky; top:0; z-index:40;
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height:64px;
}
.logo{
  font-family:var(--font-display);
  font-size:1.35rem;
  font-weight:600;
  color:var(--indigo-deep);
  text-decoration:none;
  letter-spacing:-.01em;
}
.logo em{ color:var(--amber); font-style:normal; }
.nav-links{ display:flex; gap:1.75rem; list-style:none; margin:0; padding:0; }
.nav-links a{
  text-decoration:none; color:var(--ink-soft); font-size:.94rem; font-weight:500;
}
.nav-links a:hover{ color:var(--indigo); }
.nav-cta{
  background:var(--indigo); color:#fff !important; padding:.55rem 1.1rem;
  border-radius:var(--radius-sm); font-weight:600;
}
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; }

@media (max-width: 780px){
  .nav-links{
    position:fixed; inset:64px 0 0 0; background:var(--paper);
    flex-direction:column; padding:2rem 1.25rem; gap:1.25rem;
    transform:translateX(100%); transition:transform .25s ease;
  }
  .nav-links.open{ transform:translateX(0); }
  .nav-toggle{ display:block; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:.5rem; padding:.85rem 1.5rem; border-radius:var(--radius-sm);
  font-weight:600; font-size:1rem; text-decoration:none; border:1px solid transparent;
  cursor:pointer; transition:transform .12s ease, background .15s ease;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--indigo); color:#fff; }
.btn-primary:hover{ background:var(--indigo-deep); }
.btn-secondary{ background:transparent; color:var(--indigo-deep); border-color:var(--line); }
.btn-secondary:hover{ border-color:var(--indigo); }
.btn-block{ width:100%; }
.btn-lg{ padding:1rem 1.75rem; font-size:1.05rem; }

/* ---------- hero ---------- */
.hero{
  padding:4.5rem 0 3.5rem;
  border-bottom:1px solid var(--line);
}
.hero .container{ display:grid; grid-template-columns:1.1fr .9fr; gap:3rem; align-items:center; }
@media (max-width:900px){ .hero .container{ grid-template-columns:1fr; } }
.eyebrow{
  color:var(--amber); font-weight:600; font-size:.85rem; margin-bottom:.85rem;
}
.hero-actions{ display:flex; gap:.9rem; margin-top:1.6rem; flex-wrap:wrap; }
.hero-stats{ display:flex; gap:2rem; margin-top:2.2rem; }
.hero-stat b{ display:block; font-family:var(--font-display); font-size:1.6rem; color:var(--indigo-deep); }
.hero-stat span{ font-size:.85rem; color:var(--ink-soft); }

.hero-figure{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:1.75rem;
}

/* ---------- test cards ---------- */
.section{ padding:3.5rem 0; }
.section-head{ margin-bottom:2rem; max-width:60ch; }
.test-grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:1.1rem;
}
@media (max-width:940px){ .test-grid{ grid-template-columns:repeat(2, 1fr); } }
@media (max-width:620px){ .test-grid{ grid-template-columns:1fr; } }

.test-card{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:1.4rem; display:flex; flex-direction:column; gap:.6rem;
  text-decoration:none; color:inherit;
  transition:border-color .15s ease, transform .12s ease;
}
.test-card:hover{ border-color:var(--indigo); transform:translateY(-2px); }
.test-card .icon{
  width:40px; height:40px; border-radius:var(--radius-sm);
  background:var(--amber-soft); display:flex; align-items:center; justify-content:center;
}
.test-card h3{ margin:0; font-size:1.08rem; }
.test-card p{ font-size:.92rem; margin:0; }
.test-card .meta{
  margin-top:auto; display:flex; justify-content:space-between; align-items:center;
  font-size:.82rem; color:var(--ink-soft); padding-top:.6rem; border-top:1px solid var(--line-soft);
}
.card-cta{ color:var(--indigo); font-weight:600; }

/* ---------- ad slot ---------- */
.ad-slot{
  border:1px dashed var(--line); border-radius:var(--radius-sm);
  background:#FCFCFD; color:var(--ink-soft); font-size:.8rem;
  display:flex; align-items:center; justify-content:center;
  min-height:100px; margin:2rem 0; text-transform:uppercase; letter-spacing:.04em;
}

/* ---------- footer ---------- */
.site-footer{ border-top:1px solid var(--line); padding:3rem 0 2rem; margin-top:2rem; }
.footer-grid{ display:grid; grid-template-columns:1.4fr repeat(3, 1fr); gap:2rem; }
@media (max-width:780px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
.footer-grid h4{ font-family:var(--font-body); font-size:.85rem; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-soft); font-weight:600; margin-bottom:.9rem; }
.footer-grid ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:.55rem; }
.footer-grid a{ color:var(--ink-soft); text-decoration:none; font-size:.92rem; }
.footer-grid a:hover{ color:var(--indigo); }
.footer-bottom{ margin-top:2.5rem; padding-top:1.5rem; border-top:1px solid var(--line-soft); font-size:.82rem; color:var(--ink-soft); display:flex; justify-content:space-between; flex-wrap:wrap; gap:.75rem;}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{ font-size:.85rem; color:var(--ink-soft); margin-bottom:1.25rem; }
.breadcrumbs a{ color:var(--ink-soft); text-decoration:none; }
.breadcrumbs a:hover{ color:var(--indigo); }

/* ---------- test-runner ---------- */
.test-shell{ max-width:640px; margin:0 auto; }
.progress-track{
  height:6px; background:var(--line-soft); border-radius:99px; overflow:hidden; margin-bottom:1.75rem;
}
.progress-fill{ height:100%; background:var(--indigo); border-radius:99px; transition:width .3s ease; width:0%; }
.progress-label{ display:flex; justify-content:space-between; font-size:.82rem; color:var(--ink-soft); margin-bottom:.5rem; }
.q-category{ display:inline-block; background:var(--teal-soft); color:var(--teal); font-size:.78rem; font-weight:600; padding:.25rem .6rem; border-radius:99px; margin-bottom:1rem; }
.q-prompt{ font-family:var(--font-display); font-size:1.4rem; color:var(--indigo-deep); margin-bottom:.4rem; }
.q-figure{ margin:1rem 0; }
.answers{ display:flex; flex-direction:column; gap:.7rem; margin-top:1.4rem; }
.answer-btn{
  text-align:left; padding:1rem 1.1rem; border-radius:var(--radius-md);
  border:1.5px solid var(--line); background:var(--panel); font-size:1.02rem;
  cursor:pointer; font-family:var(--font-body); color:var(--ink); transition:border-color .12s ease, background .12s ease;
}
.answer-btn:hover{ border-color:var(--indigo); }
.answer-btn.selected{ border-color:var(--indigo); background:#EEF1F8; }
.q-nav{ display:flex; justify-content:space-between; margin-top:1.75rem; }
.timer-chip{ font-family:var(--font-mono); font-size:.85rem; color:var(--ink-soft); }
.intro-card{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-md); padding:1.75rem; margin-bottom:1.5rem; }
.intro-meta{ display:flex; gap:1.5rem; margin:1rem 0; flex-wrap:wrap; }
.intro-meta div{ font-size:.85rem; color:var(--ink-soft); }
.intro-meta b{ display:block; color:var(--indigo-deep); font-family:var(--font-display); font-size:1.1rem; }

/* ---------- results ---------- */
.results-hero{ text-align:center; padding:2rem 0 1rem; }
.score-ring{ width:180px; height:180px; margin:1.5rem auto; position:relative; }
.score-ring svg{ transform:rotate(-90deg); }
.score-ring .track{ fill:none; stroke:var(--line-soft); stroke-width:10; }
.score-ring .fill{ fill:none; stroke:var(--amber); stroke-width:10; stroke-linecap:round; transition:stroke-dashoffset 1s ease; }
.score-ring .num{ position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; }
.score-ring .num b{ font-family:var(--font-display); font-size:2.4rem; color:var(--indigo-deep); }
.score-ring .num span{ font-size:.78rem; color:var(--ink-soft); }
.category-bars{ display:flex; flex-direction:column; gap:1rem; margin:2rem 0; }
.cat-row .cat-top{ display:flex; justify-content:space-between; font-size:.92rem; margin-bottom:.35rem; }
.cat-track{ height:8px; background:var(--line-soft); border-radius:99px; overflow:hidden; }
.cat-fill{ height:100%; background:var(--indigo); border-radius:99px; }
.insight-card{ background:var(--teal-soft); border:1px solid #C9E4D8; border-radius:var(--radius-md); padding:1.25rem 1.5rem; margin-bottom:1rem; }
.insight-card.watch{ background:var(--amber-soft); border-color:#F1D6A0; }
.share-row{ display:flex; gap:.75rem; flex-wrap:wrap; margin:1.5rem 0; }
.disclaimer-box{ border:1px solid var(--line); border-radius:var(--radius-md); padding:1.25rem 1.5rem; background:#FCFCFD; font-size:.88rem; color:var(--ink-soft); margin-top:2rem; }

/* ---------- article ---------- */
.article-layout{ display:grid; grid-template-columns:2fr .9fr; gap:2.5rem; }
@media (max-width:880px){ .article-layout{ grid-template-columns:1fr; } }
.toc{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-md); padding:1.25rem 1.4rem; margin-bottom:1.75rem; }
.toc h4{ margin:0 0 .6rem; font-size:.85rem; text-transform:uppercase; letter-spacing:.04em; color:var(--ink-soft); }
.toc ul{ margin:0; padding-left:1.1rem; }
.article-body h2{ margin-top:2rem; }
.faq-item{ border-top:1px solid var(--line-soft); padding:1rem 0; }
.faq-item summary{ cursor:pointer; font-weight:600; color:var(--indigo-deep); }
.related-tests{ display:flex; flex-direction:column; gap:.85rem; }
.mini-card{ display:block; border:1px solid var(--line); border-radius:var(--radius-sm); padding:.85rem 1rem; text-decoration:none; color:inherit; font-size:.92rem; }
.mini-card:hover{ border-color:var(--indigo); }
.citation-note{ font-size:.78rem; color:var(--ink-soft); background:#FCFCFD; border:1px dashed var(--line); border-radius:var(--radius-sm); padding:.6rem .8rem; margin:1rem 0; }

/* ---------- legal ---------- */
.legal-body h2{ margin-top:1.8rem; }
.legal-body{ max-width:74ch; }

/* utility */
.text-center{ text-align:center; }
.mt-2{ margin-top:2rem; }
.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); }
:focus-visible{ outline:2.5px solid var(--indigo); outline-offset:2px; }
@media (prefers-reduced-motion: reduce){ *{ animation:none !important; transition:none !important; } }

/* ---------- badges ---------- */
.badge{
  display:inline-flex; align-items:center; gap:.25rem; font-size:.72rem; font-weight:700;
  padding:.2rem .5rem; border-radius:99px; text-transform:uppercase; letter-spacing:.03em;
}
.badge-popular{ background:var(--amber-soft); color:#8A5A10; }
.badge-new{ background:var(--teal-soft); color:var(--teal); }
.test-card{ position:relative; }
.test-card .badge{ position:absolute; top:.9rem; right:.9rem; }

/* ---------- category pills ---------- */
.category-row{ display:flex; gap:.6rem; flex-wrap:wrap; margin-bottom:2rem; }
.category-pill{
  padding:.5rem 1rem; border-radius:99px; border:1px solid var(--line); background:var(--panel);
  font-size:.88rem; font-weight:600; color:var(--ink-soft); text-decoration:none;
}
.category-pill.active, .category-pill:hover{ border-color:var(--indigo); color:var(--indigo-deep); }

/* ---------- personal scores / streak widget ---------- */
.scores-widget{
  background:var(--indigo-deep); color:#fff; border-radius:var(--radius-md);
  padding:1.75rem; display:grid; grid-template-columns:repeat(3,1fr); gap:1.5rem; margin:1.5rem 0;
}
@media (max-width:700px){ .scores-widget{ grid-template-columns:1fr; } }
.scores-widget .stat b{ display:block; font-family:var(--font-display); font-size:1.7rem; }
.scores-widget .stat span{ font-size:.82rem; opacity:.8; }
.scores-widget-empty{
  border:1px dashed var(--line); border-radius:var(--radius-md); padding:1.5rem; text-align:center;
  color:var(--ink-soft); margin:1.5rem 0;
}

/* ---------- daily challenge ---------- */
.daily-card{
  background:linear-gradient(135deg, var(--indigo) 0%, var(--indigo-deep) 100%);
  color:#fff; border-radius:var(--radius-md); padding:2rem; margin:1.5rem 0;
}
.daily-card h3{ color:#fff; }
.daily-card p{ color:rgba(255,255,255,.85); }
.streak-chip{
  display:inline-flex; align-items:center; gap:.4rem; background:rgba(255,255,255,.15);
  padding:.4rem .8rem; border-radius:99px; font-size:.85rem; font-weight:600; margin-bottom:1rem;
}

/* ---------- newsletter ---------- */
.newsletter-box{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:1.75rem; display:flex; gap:1rem; align-items:center; flex-wrap:wrap; justify-content:space-between;
}
.newsletter-box form{ display:flex; gap:.6rem; flex-wrap:wrap; }
.newsletter-box input[type="email"]{
  padding:.75rem 1rem; border:1.5px solid var(--line); border-radius:var(--radius-sm); font-family:var(--font-body); min-width:220px;
}

/* ---------- why / how sections ---------- */
.feature-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1.5rem; }
@media (max-width:820px){ .feature-grid{ grid-template-columns:1fr; } }
.feature-item{ display:flex; gap:1rem; }
.feature-item .num{
  flex-shrink:0; width:36px; height:36px; border-radius:50%; background:var(--amber-soft); color:#8A5A10;
  display:flex; align-items:center; justify-content:center; font-weight:700; font-family:var(--font-display);
}