/* =========================================================================
   CoreIdeas — coreideas.ai
   Brand design system (Light / bright theme). Typeface: Rubik.
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Brand — Purple */
  --purple-900:#2D2260; --purple-700:#4A3690; --purple-500:#7767B0;
  --purple-300:#B0A4D4; --purple-200:#CDC2EA; --purple-100:#DCD6EE; --purple-50:#EDEAF6;
  /* Brand — Blue */
  --blue-900:#0B2848; --blue-700:#1456A0; --blue-500:#4EA9F8;
  --blue-100:#C8E4FF; --blue-50:#E4F1FF;
  /* Brand — Green */
  --green-900:#1A5C42; --green-700:#2D8C65; --green-500:#4FB894;
  --green-100:#C5EADD; --green-50:#E2F4EE;

  /* Light surfaces & text */
  --bg:#FFFFFF;
  --bg-tint:#F6F4FB;          /* soft purple-tinted section */
  --bg-tint-2:#EDEAF6;        /* purple-50 section */
  --surface:#FFFFFF;
  --ink:#1A1528;             /* primary headings/text */
  --ink-soft:#403A57;        /* body text */
  --muted:#6B6580;           /* captions, secondary */
  --border:#E6E2F1;
  --border-strong:#D8D2E8;

  /* Roles */
  --brand:var(--purple-700);
  --brand-deep:var(--purple-900);
  --accent:var(--green-500);
  --link:var(--blue-700);

  /* Type */
  --font:'Rubik',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;

  /* Spacing / shape */
  --container:1140px;
  --container-narrow:760px;
  --radius:14px;
  --radius-lg:22px;
  --radius-pill:999px;

  /* Shadows */
  --shadow-sm:0 1px 2px rgba(26,21,40,.06), 0 1px 3px rgba(26,21,40,.05);
  --shadow:0 6px 22px -8px rgba(45,34,96,.18), 0 2px 8px -4px rgba(45,34,96,.12);
  --shadow-lg:0 26px 60px -20px rgba(45,34,96,.30), 0 10px 24px -14px rgba(45,34,96,.20);

  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:.18s var(--ease);
  --t:.32s var(--ease);
}

/* ---------- Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;font-family:var(--font);color:var(--ink-soft);background:var(--bg);
  font-size:1.0625rem;line-height:1.65;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:none;transition:color var(--t-fast)}
a:hover{color:var(--purple-700)}
ul,ol{padding-left:1.2em}
strong{color:var(--ink);font-weight:700}
::selection{background:var(--green-100);color:var(--ink)}
:focus-visible{outline:3px solid var(--blue-500);outline-offset:3px;border-radius:4px}
hr{border:0;border-top:1px solid var(--border);margin:2.5rem 0}

/* ---------- Headings ---------- */
h1,h2,h3,h4{color:var(--brand-deep);line-height:1.12;font-weight:800;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,5.2vw,4rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem);letter-spacing:-.018em}
h3{font-size:clamp(1.18rem,1.9vw,1.45rem);font-weight:700;letter-spacing:-.01em}
h4{font-size:1.05rem;font-weight:700}
p{margin:0 0 1.1rem}
.lead{font-size:clamp(1.12rem,1.7vw,1.4rem);line-height:1.55;color:var(--ink-soft)}

.eyebrow{
  display:inline-flex;align-items:center;gap:.55em;
  font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--purple-700);margin:0 0 1rem;
}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--accent)}
.eyebrow--dual::after{content:"";width:22px;height:3px;border-radius:3px;background:var(--accent)}

/* ---------- Layout ---------- */
[id]{scroll-margin-top:94px}
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1.1rem,4vw,2rem)}
.narrow{max-width:var(--container-narrow)}
.section{padding-block:clamp(3.5rem,7vw,6.5rem)}
.section--tint{background:var(--bg-tint)}
.section--tint2{background:var(--bg-tint-2)}
.section--brand{background:linear-gradient(135deg,var(--purple-900),#3a2b78 60%,var(--blue-900));color:#EDEAF6}
.section-head{max-width:720px;margin-bottom:clamp(2rem,4vw,3rem)}
.section-head.center{margin-inline:auto;text-align:center}
.skip-link{position:absolute;left:-999px;top:0;z-index:200;background:var(--purple-900);color:#fff;
  padding:.7rem 1.1rem;border-radius:0 0 10px 0;font-weight:600}
.skip-link:focus{left:0;color:#fff}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;transition:box-shadow var(--t),border-color var(--t),background var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 24px -16px rgba(45,34,96,.45);border-bottom-color:var(--border)}
.nav{display:flex;align-items:center;gap:1.5rem;height:74px}
.brand-link{display:flex;align-items:center;flex:0 0 auto;margin-right:auto}
.brand-link img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:.35rem;list-style:none;margin:0;padding:0}
.nav-links a:not(.btn){
  display:inline-block;padding:.55rem .85rem;border-radius:10px;color:var(--ink);
  font-weight:500;font-size:.98rem;position:relative;transition:color var(--t-fast),background var(--t-fast)
}
.nav-links a:not(.btn):hover{color:var(--purple-700);background:var(--purple-50)}
.nav-links a:not(.btn)[aria-current="page"]{color:var(--purple-700)}
.nav-links a:not(.btn)[aria-current="page"]::after{
  content:"";position:absolute;left:.85rem;right:.85rem;bottom:.3rem;height:2px;border-radius:2px;background:var(--accent)
}
.nav-cta{margin-left:.4rem}
.nav-toggle{display:none;border:0;background:transparent;padding:.4rem;cursor:pointer;border-radius:10px}
.nav-toggle:hover{background:var(--purple-50)}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--t),opacity var(--t-fast)}
.nav-toggle span+span{margin-top:6px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font:inherit;font-weight:600;font-size:1rem;line-height:1;cursor:pointer;
  padding:.85rem 1.5rem;border-radius:var(--radius-pill);border:1.5px solid transparent;
  transition:transform var(--t-fast),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn svg{width:1.05em;height:1.05em}
.btn--primary{background:linear-gradient(135deg,var(--purple-700),var(--purple-900));color:#fff;box-shadow:var(--shadow)}
.btn--primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn--ghost{background:#fff;color:var(--purple-700);border-color:var(--border-strong)}
.btn--ghost:hover{color:var(--purple-900);border-color:var(--purple-300);background:var(--purple-50);transform:translateY(-2px)}
.btn--light{background:#fff;color:var(--purple-900)}
.btn--light:hover{color:var(--purple-900);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn--outline-light{background:transparent;color:#EDEAF6;border-color:rgba(237,234,246,.4)}
.btn--outline-light:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn--lg{padding:1rem 1.8rem;font-size:1.06rem}
.btn-row{display:flex;flex-wrap:wrap;gap:.9rem;align-items:center}

.text-link{font-weight:600;color:var(--link);display:inline-flex;align-items:center;gap:.35em}
.text-link svg{width:1em;height:1em;transition:transform var(--t-fast)}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;
  background:radial-gradient(120% 120% at 85% -10%,var(--purple-50) 0%,#fff 45%) ,#fff;
  padding-block:clamp(3.5rem,8vw,7rem)}
.hero .container{position:relative;z-index:2}
.hero__eyebrow{color:var(--purple-700)}
.hero h1{margin-bottom:.4em;max-width:14ch}
.hero h1 .dot{color:var(--accent)}
.hero__lead{max-width:46ch;margin-bottom:1.2rem}
.hero__sub{max-width:60ch;color:var(--muted);font-size:1.02rem;margin-bottom:2rem}
.hero__cta{margin-bottom:1.2rem}
/* decorative CI-grid squares */
.hero__decor{position:absolute;inset:0;z-index:1;pointer-events:none}
.sq{position:absolute;border-radius:14px;opacity:.55}
.sq--1{width:120px;height:120px;top:12%;right:8%;background:var(--purple-100)}
.sq--2{width:56px;height:56px;top:9%;right:4%;background:var(--green-500);opacity:.85}
.sq--3{width:64px;height:64px;top:34%;right:16%;background:var(--blue-100)}
.sq--4{width:90px;height:90px;bottom:12%;right:24%;border:3px solid var(--purple-200,#ccc1ea);background:transparent;opacity:.5}
@media (min-width:861px){
  .hero__decor .sq{animation:float 9s ease-in-out infinite}
  .sq--2{animation-delay:-2s !important}
  .sq--3{animation-delay:-4s !important}
  .sq--4{animation-delay:-1s !important}
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}

/* ---------- Grids / cards ---------- */
.grid{display:grid;gap:1.4rem}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:1.8rem;position:relative;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  height:100%;
}
.card--link:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--purple-200,#cdc2ea)}
.card h3{margin-bottom:.5rem}
.card p{margin:0;color:var(--ink-soft)}
.card .text-link{margin-top:1rem}
.card__icon{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;margin-bottom:1.2rem;
  background:var(--purple-50);color:var(--purple-700);
}
.card__icon svg{width:28px;height:28px}
.card--accent .card__icon{background:var(--green-50);color:var(--green-700)}
.card--blue .card__icon{background:var(--blue-50);color:var(--blue-700)}
.card__num{font-size:.85rem;font-weight:700;color:var(--purple-300);letter-spacing:.04em}

/* feature list (research detail) */
.feature{display:grid;grid-template-columns:auto 1fr;gap:1.2rem 1.4rem;align-items:start;
  padding:1.8rem;border:1px solid var(--border);border-radius:var(--radius-lg);background:#fff;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--purple-200,#cdc2ea)}
.feature__icon{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;background:var(--purple-50);color:var(--purple-700)}
.feature__icon svg{width:26px;height:26px}
.feature h3{margin:.15rem 0 .5rem}
.feature p{margin:0}

/* ---------- Value chips ---------- */
.values{display:flex;flex-wrap:wrap;gap:.7rem}
.chip{display:inline-flex;align-items:center;gap:.55em;padding:.6rem 1.1rem;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--border);font-weight:600;color:var(--purple-900);font-size:.98rem;
  transition:transform var(--t-fast),border-color var(--t-fast),box-shadow var(--t-fast)}
.chip:hover{transform:translateY(-2px);border-color:var(--purple-300);box-shadow:var(--shadow-sm)}
.chip .dot{width:9px;height:9px;border-radius:3px;background:var(--accent)}

/* ---------- At-a-glance facts ---------- */
.facts{list-style:none;margin:0;padding:0;display:grid;gap:.1rem}
.facts li{display:grid;grid-template-columns:minmax(140px,200px) 1fr;gap:1rem;padding:.85rem 0;border-bottom:1px solid var(--border)}
.facts li:last-child{border-bottom:0}
.facts dt,.facts .k{font-weight:600;color:var(--purple-900)}
.facts .v{color:var(--ink-soft)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--purple-900),#3a2b78 55%,var(--blue-900));color:#EDEAF6;
  padding:clamp(2.2rem,5vw,3.6rem);text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:#cfc8e6;max-width:55ch;margin-inline:auto}
.cta-band .btn-row{justify-content:center;margin-top:1.6rem}

/* ---------- Prose (legal / long-form) ---------- */
.prose{max-width:var(--container-narrow)}
.prose h2{font-size:clamp(1.3rem,2.4vw,1.7rem);margin-top:2.4rem}
.prose h3{margin-top:1.6rem}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose p,.prose li{color:var(--ink-soft)}
.prose a{font-weight:500;text-decoration:underline;text-underline-offset:2px;text-decoration-color:var(--purple-200,#cdc2ea)}
.prose a:hover{text-decoration-color:var(--purple-700)}
.prose ul,.prose ol{margin:0 0 1.1rem}
.prose li{margin-bottom:.4rem}
.doc-meta{color:var(--muted);font-size:.95rem;margin-top:-.4rem;margin-bottom:2rem}
.page-head{padding-block:clamp(2.6rem,6vw,4.5rem) clamp(1.4rem,3vw,2rem);
  background:radial-gradient(120% 130% at 90% -20%,var(--purple-50),#fff 55%)}

/* tables */
.table-wrap{overflow-x:auto;margin:1.2rem 0 1.6rem}
table{border-collapse:collapse;width:100%;font-size:.97rem}
th,td{text-align:left;padding:.75rem .9rem;border-bottom:1px solid var(--border);vertical-align:top}
thead th{background:var(--purple-50);color:var(--purple-900);font-weight:700;border-bottom:1px solid var(--border-strong)}
tbody tr:nth-child(even){background:var(--bg-tint)}

/* ---------- FAQ accordion ---------- */
.faq{display:grid;gap:.8rem;max-width:820px}
.faq details{border:1px solid var(--border);border-radius:var(--radius);background:#fff;overflow:hidden;
  transition:border-color var(--t),box-shadow var(--t)}
.faq details[open]{border-color:var(--purple-200,#cdc2ea);box-shadow:var(--shadow-sm)}
.faq summary{list-style:none;cursor:pointer;padding:1.1rem 1.3rem;font-weight:700;color:var(--purple-900);
  display:flex;align-items:center;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--purple-700)}
.faq summary .ic{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform var(--t)}
.faq summary .ic::before,.faq summary .ic::after{content:"";position:absolute;background:var(--purple-500);border-radius:2px}
.faq summary .ic::before{top:10px;left:3px;right:3px;height:2px}
.faq summary .ic::after{left:10px;top:3px;bottom:3px;width:2px;transition:transform var(--t)}
.faq details[open] summary .ic::after{transform:scaleY(0)}
.faq .faq__body{padding:0 1.3rem 1.2rem}
.faq .faq__body p{margin:0;color:var(--ink-soft)}

/* ---------- Contact card ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:start}
.info-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.8rem;box-shadow:var(--shadow-sm)}
.info-card h3{margin-bottom:.3rem;font-size:1.05rem}
.info-card .row{display:flex;gap:.9rem;padding:1rem 0;border-bottom:1px solid var(--border)}
.info-card .row:last-child{border-bottom:0}
.info-card .row:first-child{padding-top:0}
.info-ic{flex:0 0 auto;width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--purple-50);color:var(--purple-700)}
.info-ic svg{width:21px;height:21px}
.info-card address{font-style:normal;color:var(--ink-soft)}

/* ---------- Footer ---------- */
.site-footer{background:#15102b;color:#cfc8e6;padding-block:clamp(3rem,6vw,4.5rem) 2rem;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2.5rem;margin-bottom:2.5rem}
.site-footer img.flogo{height:38px;margin-bottom:1.1rem}
.site-footer .legal-block{font-size:.92rem;line-height:1.7;color:#a79fc4;max-width:42ch}
.site-footer .legal-block strong{color:#EDEAF6;font-weight:600}
.footer-col h4{color:#fff;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:1rem}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:.6rem}
.footer-col a{color:#bdb5d6;font-size:.97rem}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:1.6rem;
  display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;font-size:.9rem;color:#9890b3}
.footer-bottom .fb-links{display:flex;flex-wrap:wrap;gap:1.2rem}
.footer-bottom a{color:#9890b3}.footer-bottom a:hover{color:#fff}
.btn-linklike{background:none;border:0;padding:0;font:inherit;color:#9890b3;cursor:pointer}
.btn-linklike:hover{color:#fff;text-decoration:underline}

/* ---------- Cookie banner ---------- */
.cookie{position:fixed;left:1rem;right:1rem;bottom:1rem;z-index:150;max-width:760px;margin-inline:auto;
  background:#fff;border:1px solid var(--border-strong);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
  padding:1.3rem 1.4rem;display:none;
  transform:translateY(20px);opacity:0;transition:transform .4s var(--ease),opacity .4s var(--ease)}
.cookie.is-open{display:block}
.cookie.is-in{transform:translateY(0);opacity:1}
.cookie p{margin:0 0 1rem;font-size:.95rem;color:var(--ink-soft)}
.cookie .cookie-actions{display:flex;flex-wrap:wrap;gap:.7rem}
.cookie .btn{padding:.7rem 1.2rem;font-size:.95rem}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.08s}
.reveal[data-delay="2"]{transition-delay:.16s}
.reveal[data-delay="3"]{transition-delay:.24s}
.reveal[data-delay="4"]{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1 !important;transform:none !important;transition:none !important}
  .hero__decor .sq{animation:none !important}
  .btn:hover,.card--link:hover,.feature:hover,.chip:hover{transform:none !important}
}

/* ---------- Utilities ---------- */
.center{text-align:center}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.muted{color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:1.4rem}
}
@media (max-width:860px){
  .nav-toggle{display:block}
  .nav-links{
    position:absolute;left:0;right:0;top:74px;flex-direction:column;align-items:stretch;gap:.2rem;
    background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow);
    padding:.8rem clamp(1.1rem,4vw,2rem) 1.2rem;
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:transform var(--t),opacity var(--t)
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a:not(.btn){padding:.8rem .6rem;font-size:1.05rem}
  .nav-links a:not(.btn)[aria-current="page"]::after{display:none}
  /* In the mobile menu, render the "Get in touch" CTA like the other links */
  .nav-cta{margin:0}
  .nav-cta .btn{
    display:block;width:100%;text-align:left;justify-content:flex-start;
    background:none;color:var(--ink);box-shadow:none;border:0;
    border-radius:10px;font-weight:500;font-size:1.05rem;padding:.8rem .6rem;
  }
  .nav-cta .btn:hover{background:var(--purple-50);color:var(--purple-700);box-shadow:none;transform:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.8rem}
  .site-footer .brand-foot{grid-column:1/-1}
}
@media (max-width:560px){
  .grid--3,.grid--4,.grid--2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .facts li{grid-template-columns:1fr;gap:.15rem}
  .feature{grid-template-columns:1fr}
  .btn-row .btn{width:100%}
}