/* Collaborative Structures — shared site styles
   Design system matches prodopsassess.collabstructures.com and ai.collabstructures.com */

:root{
  --navy:#1E1B4B;      /* darkest indigo */
  --navy2:#312E81;     /* deep indigo    */
  --indigo:#4F46E5;    /* primary indigo */
  --indigo-l:#6366F1;  /* light indigo   */
  --green:#10B981;     /* accent green   */
  --red:#DC2626;       /* accent red     */
  --ink:#18181B;
  --muted:#52525B;
  --line:#E4E4E7;
  --bg:#FFFFFF;
  --soft:#FAFAFA;
  --grad:linear-gradient(135deg,#4F46E5 0%,#312E81 50%,#1E1B4B 100%);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  line-height:1.6;
  background:var(--soft);
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
section{padding:76px 0;border-bottom:1px solid var(--line)}
h1{font-size:clamp(30px,4.4vw,50px);line-height:1.12;letter-spacing:-.5px;margin:0 0 20px}
h2{font-size:clamp(24px,3vw,34px);line-height:1.2;letter-spacing:-.3px;margin:0 0 16px}
h3{font-size:20px;margin:0 0 8px}
h4{font-size:16px;margin:0 0 6px}
p{margin:0 0 16px;font-size:17px}
a{color:var(--indigo)}
.lede{font-size:19px;color:var(--muted);max-width:760px}
.eyebrow{font-size:12px;letter-spacing:1.6px;text-transform:uppercase;font-weight:700;color:var(--muted);margin:0 0 10px}
ul{margin:0 0 16px;padding-left:20px}
li{font-size:16px;margin-bottom:7px}
.center{text-align:center}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:14px 26px;border-radius:8px;text-decoration:none;
     font-weight:700;font-size:15px;margin:6px 10px 6px 0;transition:.15s;border:0;cursor:pointer}
.btn-primary{background:var(--indigo);color:#fff}
.btn-primary:hover{background:var(--navy2)}
.btn-ghost{background:transparent;color:var(--navy);border:2px solid var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}

/* ---------- site header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}
.nav-brand{display:flex;align-items:center;text-decoration:none}
.nav-brand img{height:40px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav-links > li{position:relative;margin:0}
.nav-links a{
  display:block;padding:10px 14px;text-decoration:none;color:var(--ink);
  font-size:15px;font-weight:600;border-radius:6px;
}
.nav-links a:hover{background:#EEF2FF;color:var(--navy2)}
.nav-links a[aria-current="page"]{color:var(--indigo)}
.nav-cta{background:var(--indigo);color:#fff !important;padding:10px 18px !important}
.nav-cta:hover{background:var(--navy2) !important}

/* dropdown */
.has-sub > button{
  font:inherit;font-size:15px;font-weight:600;color:var(--ink);background:none;border:0;
  padding:10px 14px;border-radius:6px;cursor:pointer;display:flex;align-items:center;gap:6px;
}
.has-sub > button:hover{background:#EEF2FF;color:var(--navy2)}
.has-sub > button::after{content:"";width:6px;height:6px;border-right:2px solid currentColor;
  border-bottom:2px solid currentColor;transform:rotate(45deg);margin-top:-3px}
.submenu{
  display:none;position:absolute;top:100%;left:0;min-width:260px;background:#fff;
  border:1px solid var(--line);border-radius:8px;padding:8px;list-style:none;margin:6px 0 0;
  box-shadow:0 10px 30px rgba(0,0,0,.10);
}
.has-sub:hover .submenu,
.has-sub:focus-within .submenu,
.submenu.open{display:block}
.submenu a{padding:10px 12px;font-weight:500}

/* mobile nav toggle */
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;
  padding:8px 12px;font-size:15px;font-weight:600;cursor:pointer;color:var(--ink)}

/* ---------- hero ---------- */
.hero{background:var(--grad);color:#fff;border-bottom:none}
.hero h1{color:#fff;max-width:900px}
.hero p{color:#D6D3F0;max-width:780px;font-size:18px}
.hero .btn-ghost{color:#fff;border-color:#fff}
.hero .btn-ghost:hover{background:#fff;color:var(--navy)}
.hero .btn-primary{background:#fff;color:var(--navy)}
.hero .btn-primary:hover{background:#EEF2FF}
.hero .eyebrow{color:#C7C3EE}

/* ---------- layout helpers ---------- */
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.card{background:#fff;border-radius:8px;padding:26px;
  border-top:4px solid var(--navy2);border-left:1px solid var(--line);
  border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.card p{font-size:16px;margin:0 0 10px}
.card p:last-child{margin-bottom:0}
.card h3{font-size:18px}
.card .result{font-size:15px;color:var(--navy2);font-weight:700}
.card .quiet{font-size:14px;color:var(--muted)}

.alt{background:#fff}
.highlight{border-left:4px solid var(--indigo);background:#EEF2FF;
  border-radius:0 8px 8px 0;padding:14px 0 14px 20px;font-size:18px}

.stats{background:#fff;border:1px solid var(--line);border-radius:8px;padding:38px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.stat .big{font-size:40px;font-weight:700;color:var(--indigo);line-height:1}
.stat .lbl{font-size:14px;color:var(--muted);margin-top:8px}

.checklist{list-style:none;padding:0;margin:0}
.checklist li{position:relative;padding-left:28px;margin-bottom:10px;font-size:16px}
.checklist li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:3px solid var(--green);border-bottom:3px solid var(--green);
  transform:rotate(-45deg)}

.tags{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:0;list-style:none}
.tags li{background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:8px 16px;font-size:14px;color:var(--ink);margin:0}

.clients{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;align-items:center;
  padding:0;margin:0;list-style:none}
.clients li{display:flex;align-items:center;justify-content:center;margin:0;
  width:210px;height:96px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:16px 24px}
.clients img{max-height:56px;max-width:100%;width:auto;height:auto;object-fit:contain;display:block}

/* course / offer box */
.offer{border:1px solid var(--line);border-radius:8px;padding:34px;background:#fff}
.offer.featured{border-color:var(--indigo);box-shadow:0 4px 22px rgba(0,0,0,.06)}
.session{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;background:#FAFAFA;border:1px solid var(--line);border-radius:8px;padding:20px 24px}
.session .when{font-size:20px;font-weight:700;color:var(--navy2);margin:0}
.session .where{font-size:15px;color:var(--muted);margin:4px 0 0}

/* ---------- CTA band ---------- */
.cta{background:var(--grad);color:#fff;text-align:center;border-bottom:none}
.cta h2{color:#fff}
.cta p{color:#D6D3F0;max-width:640px;margin-left:auto;margin-right:auto}
.cta .btn-primary{background:#fff;color:var(--navy)}
.cta .btn-primary:hover{background:#EEF2FF}
.cta .btn-ghost{color:#fff;border-color:#fff}
.cta .btn-ghost:hover{background:#fff;color:var(--navy)}

/* ---------- contact form ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-size:14px;font-weight:700;margin-bottom:6px;color:var(--ink)}
.form-field input,.form-field textarea{
  width:100%;padding:12px 14px;font:inherit;font-size:16px;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:8px;
}
.form-field input:focus,.form-field textarea:focus{
  outline:2px solid var(--indigo);outline-offset:1px;border-color:var(--indigo)}
.form-field textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:44px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:28px}
.site-footer h4{font-size:13px;text-transform:uppercase;letter-spacing:1.2px;
  color:var(--muted);margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{font-size:15px;margin-bottom:8px}
.site-footer a{color:var(--ink);text-decoration:none}
.site-footer a:hover{color:var(--indigo);text-decoration:underline}
.site-footer img.mark{height:52px;width:auto;opacity:.85;margin-bottom:12px;display:block}
.footer-bottom{border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--muted);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}
.footer-bottom p{margin:0;font-size:13px}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .grid3,.grid4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr;gap:22px}
  .contact-grid{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  section{padding:52px 0}
}
@media(max-width:760px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;
    gap:0;padding:10px 20px 18px;box-shadow:0 12px 24px rgba(0,0,0,.08);
  }
  .nav-links.open{display:flex}
  .nav{position:relative;flex-wrap:wrap}
  .submenu{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 12px;margin:0}
  .has-sub > button{width:100%;justify-content:space-between}
  .nav-cta{text-align:center;margin-top:8px}
}
@media(max-width:640px){
  .grid2,.grid3,.grid4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* ---------- course chooser + syllabus accordion ---------- */
.chooser{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin-top:30px}
.chooser .card{display:flex;flex-direction:column}
.chooser .card p{flex:1}
.chooser .meta{font-size:14px;color:var(--muted);font-weight:700;text-transform:uppercase;
  letter-spacing:1px;margin:0 0 10px}

.syllabus{margin-top:26px}
.day{border:1px solid var(--line);border-radius:8px;background:#fff;margin-bottom:16px;overflow:hidden}
.day > summary{
  list-style:none;cursor:pointer;padding:22px 26px;font-weight:700;font-size:18px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--ink);
}
.day > summary::-webkit-details-marker{display:none}
.day > summary::after{content:"";width:9px;height:9px;flex:none;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);margin-top:-4px;transition:transform .15s}
.day[open] > summary::after{transform:rotate(225deg);margin-top:2px}
.day > summary:hover{background:#EEF2FF}
.day .day-focus{display:block;font-weight:400;font-size:14px;color:var(--muted);margin-top:4px}
.day-body{padding:0 26px 22px;border-top:1px solid var(--line)}
.day-body h4{font-size:16px;margin:22px 0 8px;color:var(--navy2)}
.day-body ul{margin:0;padding-left:20px}
.day-body li{font-size:15px;margin-bottom:6px;color:var(--ink)}

@media(max-width:760px){
  .chooser{grid-template-columns:1fr}
  .day > summary{padding:18px 20px;font-size:17px}
  .day-body{padding:0 20px 18px}
}

/* ---------- landing page form controls ---------- */
.lp-form{background:#fff;border:1px solid var(--line);border-radius:8px;padding:34px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
fieldset{border:0;padding:0;margin:0 0 18px}
fieldset legend{font-size:14px;font-weight:700;color:var(--ink);padding:0;margin-bottom:10px}
.opts{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:0;list-style:none}
.opt{display:flex;align-items:center;gap:9px;margin:0;border:1px solid var(--line);
  background:#FAFAFA;border-radius:8px;padding:11px 16px;font-size:15px;cursor:pointer}
.opt:hover{border-color:var(--indigo);background:#EEF2FF}
.opt input{margin:0;accent-color:var(--indigo);width:16px;height:16px;flex:none}
.opt:has(input:checked){border-color:var(--indigo);background:#EEF2FF;font-weight:600}
select{width:100%;padding:12px 14px;font:inherit;font-size:16px;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:8px}
select:focus{outline:2px solid var(--indigo);outline-offset:1px;border-color:var(--indigo)}
.form-note{font-size:14px;color:var(--muted);margin:16px 0 0}
.lp-aside .card{margin-bottom:18px}
.lp-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start}

@media(max-width:900px){
  .lp-grid{grid-template-columns:1fr;gap:28px}
}
@media(max-width:640px){
  .field-row{grid-template-columns:1fr}
  .lp-form{padding:24px}
}