/* Base + theme */
:root{
  --bg0:#f6fbff;
  --bg1:#eef6ff;
  --panel:rgba(255,255,255,.78);
  --panel2:rgba(255,255,255,.92);
  --text:#0b1633;
  --muted:#3b4e6f;
  --muted2:#516a8c;
  --brand:#0ea5e9;
  --brand2:#6366f1;
  --accent:#f97316;
  --border:rgba(2,6,23,.12);
  --shadow:0 16px 44px rgba(2, 8, 23, .12);
  --radius:18px;
  --radius2:26px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  /* background:
    radial-gradient(900px 420px at 15% 5%, rgba(14,165,233,.22), transparent 55%),
    radial-gradient(780px 440px at 95% 10%, rgba(99,102,241,.20), transparent 52%),
    radial-gradient(720px 520px at 30% 90%, rgba(249,115,22,.10), transparent 58%),
    linear-gradient(180deg, var(--bg0), var(--bg1)); */
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  width:100%;
  max-width:1120px;
  margin:0 auto;
  padding:0 18px;
}

.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:18px; top:18px; width:auto; height:auto;
  background:#ffffff; border:1px solid rgba(14,165,233,.35); padding:10px 12px; border-radius:12px;
  z-index:9999;
}

/* Navbar */
.nav{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(120%) blur(10px);
  background:rgba(255,255,255,.78);
  border-bottom:1px solid rgba(2,6,23,.10);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
  gap:12px;
}
.brand{
  display:flex; align-items:center; gap:12px;
}
.logo{
  height:44px; width:auto;
}
.nav-links{
  display:flex; gap:18px; align-items:center;
}
.nav-links a{
  color:var(--muted);
  font-weight:600;
  font-size:14px;
  padding:10px 10px;
  border-radius:12px;
  transition:background .2s ease, color .2s ease;
}
.nav-links a:hover{
  color:var(--text);
  background:rgba(14,165,233,.10);
}
.nav-cta{
  display:flex; gap:10px; align-items:center;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.78);
  color:var(--text);
  font-weight:700;
  cursor:pointer;
  transition:transform .12s ease, background .2s ease, border-color .2s ease;
  user-select:none;
}
.btn:hover{ transform: translateY(-1px); background:rgba(255,255,255,.95); border-color:rgba(14,165,233,.35); }
.btn:active{ transform: translateY(0px); }
.btn-primary{
  border-color:rgba(14,165,233,.35);
  background:linear-gradient(135deg, rgba(14,165,233,.24), rgba(99,102,241,.18));
  box-shadow:0 14px 40px rgba(99,102,241,.14);
}
.btn-quiet{
  background:rgba(2,6,23,.03);
  color:var(--muted);
  border-color:rgba(2,6,23,.08);
}
.icon{
  width:18px; height:18px; display:inline-block;
}

.burger{
  display:none;
  border:1px solid rgba(2,6,23,.12);
  background:rgba(255,255,255,.78);
  padding:10px 12px;
  border-radius:14px;
}
.burger-lines{
  width:18px; height:14px; position:relative;
}
.burger-lines::before,.burger-lines::after,.burger-lines span{
  content:"";
  position:absolute; left:0; right:0;
  height:2px; background:rgba(2,6,23,.60); border-radius:999px;
}
.burger-lines::before{ top:0; }
.burger-lines span{ top:6px; }
.burger-lines::after{ bottom:0; }

.mobile-panel{
  display:none;
  padding:0 0 16px;
}
.mobile-panel-inner{
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.78);
  border-radius:18px;
  padding:10px;
}
.mobile-panel a{
  display:flex; width:100%;
  padding:12px 12px;
  border-radius:14px;
  color:var(--muted);
  font-weight:700;
}
.mobile-panel a:hover{ background:rgba(14,165,233,.10); color:var(--text); }
.mobile-panel .row{
  display:flex; gap:10px; flex-wrap:wrap; padding:10px;
}

/* Mobile WhatsApp floating CTA */
.whatsapp-fab{
  position:fixed;
  bottom:14px; left:50%;
  transform:translateX(-50%);
  z-index:60;
  width: min(560px, calc(100% - 24px));
  display:none;
}
.whatsapp-fab .btn{
  width:100%;
  border-radius:18px;
  background:linear-gradient(135deg, rgba(37,211,102,.18), rgba(37,211,102,.08));
  border-color:rgba(37,211,102,.38);
  color:#052610;
}
.wa-dot{
  width:10px; height:10px; border-radius:50%;
  background:#25d366;
  box-shadow:0 0 0 6px rgba(37,211,102,.14);
}

/* Hero */
.hero{
  position:relative;
  padding:54px 0 30px;
}
.hero::before{
  content:"";
  position:absolute; inset:-40px -20px auto -20px;
  height:340px;
  background:
    radial-gradient(closest-side at 20% 35%, rgba(14,165,233,.30), transparent 65%),
    radial-gradient(closest-side at 70% 25%, rgba(99,102,241,.26), transparent 63%);
  pointer-events:none;
  filter: blur(6px);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap:22px;
  align-items:stretch;
  margin-top:8px;
}
.hero-title{
  margin:0;
  font-size:48px;
  line-height:1.05;
  letter-spacing:-.6px;
}
.hero-sub{
  margin:12px 0 0;
  font-size:16px;
  color:var(--muted);
  line-height:1.6;
  max-width:60ch;
}
.hero-badges{
  display:flex; gap:10px; flex-wrap:wrap;
  margin-top:18px;
}
.badge{
  padding:9px 12px;
  border-radius:999px;
  border:1px solid rgba(2,6,23,.12);
  background:rgba(255,255,255,.68);
  color:var(--muted);
  font-weight:700;
  font-size:13px;
}
.hero-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:22px;
}
.hero-side{
  border:1px solid rgba(2,6,23,.10);
  background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.70));
  border-radius: var(--radius2);
  box-shadow: var(--shadow);
  overflow:hidden;
  position:relative;
}
.hero-side::after{
  content:"";
  position:absolute; inset:-40% -10% auto -10%;
  height:240px;
  background:
    radial-gradient(closest-side at 30% 40%, rgba(14,165,233,.26), transparent 70%),
    radial-gradient(closest-side at 70% 10%, rgba(99,102,241,.18), transparent 65%);
  opacity:.22;
  transform: rotate(-3deg);
}
.hero-side-inner{
  padding:18px 18px 16px;
  position:relative;
  z-index:1;
}

.hero-illus{
  position:absolute;
  top:12px;
  right:12px;
  width:96px;
  height:auto;
  opacity:.28;
  pointer-events:none;
}

.program-illus{
  width:26px;
  height:26px;
  opacity:.75;
  margin-top:8px;
  flex:0 0 auto;
}
.side-title{
  margin:0;
  font-size:18px;
  letter-spacing:-.2px;
}
.side-list{
  margin:10px 0 0;
  padding:0;
  list-style:none;
  display:grid;
  gap:10px;
}
.side-item{
  display:flex; gap:10px; align-items:flex-start;
  padding:12px 12px;
  border-radius:16px;
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.66);
}
.tick{
  width:18px; height:18px; border-radius:6px;
  background:linear-gradient(135deg, rgba(14,165,233,.22), rgba(99,102,241,.12));
  border:1px solid rgba(14,165,233,.32);
  position:relative;
  margin-top:2px;
}
.tick::after{
  content:"";
  position:absolute;
  left:5px; top:4px;
  width:7px; height:4px;
  border-left:2px solid rgba(11,22,51,.92);
  border-bottom:2px solid rgba(11,22,51,.92);
  transform: rotate(-45deg);
}
.side-item strong{
  display:block;
  font-size:13px;
}
.side-item span{
  color:var(--muted2);
  font-weight:600;
  font-size:12.5px;
  line-height:1.5;
  display:block;
  margin-top:4px;
}

/* Sections */
.section{
  padding:28px 0;
}
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:14px; flex-wrap:wrap;
  margin-bottom:14px;
}
.section h2{
  margin:0;
  font-size:26px;
  letter-spacing:-.3px;
}
.section p.lead{
  margin:6px 0 0;
  color:var(--muted);
  line-height:1.7;
  max-width:65ch;
}
.grid{
  display:grid;
  gap:14px;
}
.grid-3{ grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-2{ grid-template-columns: repeat(2, minmax(0,1fr)); }
.card{
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.75);
  border-radius: var(--radius);
  padding:16px;
  box-shadow: 0 10px 26px rgba(2, 8, 23, .10);
}
.card.soft{
  background:rgba(255,255,255,.58);
}
.card-title{
  margin:0;
  font-size:16px;
  letter-spacing:-.2px;
}
.card-sub{
  margin:10px 0 0;
  color:var(--muted);
  line-height:1.65;
  font-weight:600;
  font-size:14px;
}
.divider{
  height:1px;
  background:rgba(2,6,23,.10);
  margin:18px 0;
}

/* Program cards */
.program{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.program-top{
  display:flex; gap:12px; align-items:flex-start;
}
.program-mark{
  width:44px; height:44px;
  border-radius:16px;
  border:1px solid rgba(2,6,23,.12);
  background:linear-gradient(135deg, rgba(14,165,233,.22), rgba(99,102,241,.14));
  display:flex; align-items:center; justify-content:center;
  font-weight:900;
  color:rgba(11,22,51,.95);
}
.list{
  margin:0; padding:0; list-style:none; display:grid; gap:8px;
}
.list li{
  display:flex; gap:10px; align-items:flex-start;
  color:var(--muted);
  font-weight:650;
  font-size:13.5px;
  line-height:1.5;
}
.list li::before{
  content:"";
  width:8px; height:8px; border-radius:50%;
  background:rgba(14,165,233,.55);
  margin-top:6px;
  flex:0 0 auto;
}

/* Teacher */
.teacher{
  display:flex; gap:14px; align-items:flex-start;
}
.avatar{
  width:56px; height:56px;
  border-radius:20px;
  border:1px solid rgba(2,6,23,.12);
  background:
    radial-gradient(closest-side at 30% 30%, rgba(14,165,233,.35), transparent 65%),
    linear-gradient(135deg, rgba(255,255,255,.78), rgba(255,255,255,.60));
  display:flex; align-items:center; justify-content:center;
  font-weight:900; letter-spacing:.3px;
}
.teacher h3{
  margin:0;
  font-size:16px;
}
.teacher .meta{
  color:var(--muted);
  font-weight:700;
  font-size:13.5px;
  margin-top:6px;
  line-height:1.6;
}

/* Principles */
.principle-tiles{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap:14px;
}
.tile{
  cursor:pointer;
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.62);
  border-radius: var(--radius);
  padding:14px;
  transition: transform .12s ease, border-color .2s ease, background .2s ease;
  min-height:150px;
}
.tile:hover{ transform: translateY(-1px); border-color:rgba(14,165,233,.28); background:rgba(255,255,255,.82); }
.tile h4{ margin:0; font-size:16px; letter-spacing:-.2px; }
.tile p{ margin:10px 0 0; color:var(--muted); line-height:1.65; font-weight:650; font-size:14px; }
.tile.active{
  border-color:rgba(14,165,233,.50);
  box-shadow:0 18px 60px rgba(14,165,233,.12);
  background:linear-gradient(180deg, rgba(14,165,233,.12), rgba(255,255,255,.62));
}
.principle-detail{
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.70);
  border-radius: var(--radius2);
  padding:18px;
  overflow:hidden;
  position:relative;
}
.principle-detail::before{
  content:"";
  position:absolute; inset:auto -30% -40% -30%;
  height:200px;
  background:
    radial-gradient(closest-side, rgba(14,165,233,.22), transparent 70%),
    radial-gradient(closest-side, rgba(99,102,241,.18), transparent 70%);
  pointer-events:none;
}
.principle-detail > *{ position:relative; z-index:1; }
.principle-detail .kicker{
  color:rgba(14,165,233,.95);
  font-weight:900;
  font-size:12.5px;
  letter-spacing:.4px;
  text-transform:uppercase;
}
.principle-detail h3{
  margin:8px 0 0;
  font-size:22px;
  letter-spacing:-.3px;
}
.principle-detail p{
  margin:12px 0 0;
  color:var(--muted);
  line-height:1.75;
  font-weight:650;
}
.principle-detail .bullets{
  margin:12px 0 0;
  padding-left:16px;
  color:var(--muted);
  line-height:1.75;
  font-weight:650;
}

/* FAQ */
.faq{
  display:grid; gap:10px;
}
.faq-item{
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.72);
  border-radius:16px;
  overflow:hidden;
}
.faq-button{
  width:100%;
  text-align:left;
  border:0;
  background:transparent;
  color:var(--text);
  font-weight:850;
  padding:14px 14px;
  cursor:pointer;
  display:flex; gap:10px; align-items:flex-start; justify-content:space-between;
}
.faq-button span{
  color:var(--text);
}
.faq-chevron{
  width:18px; height:18px; margin-top:2px; flex:0 0 auto;
  border-right:2px solid rgba(11,22,51,.55);
  border-bottom:2px solid rgba(11,22,51,.55);
  transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq-item[data-open="true"] .faq-chevron{
  transform: rotate(225deg);
}
.faq-panel{
  padding:0 14px 14px;
  display:none;
}
.faq-item[data-open="true"] .faq-panel{ display:block; }
.faq-panel p{
  margin:0;
  color:var(--muted);
  line-height:1.7;
  font-weight:650;
}

/* Reveal on scroll */
.reveal{
  opacity:0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in{
  opacity:1;
  transform: translateY(0px);
}

/* Footer */
.footer{
  margin-top:28px;
  border-top:1px solid rgba(2,6,23,.10);
}
.footer-main{
  padding:28px 0 18px;
}
.footer-grid{
  display:grid; gap:16px;
  grid-template-columns: 1.2fr .8fr .7fr 1fr;
  align-items:start;
}
.footer-col h3{
  margin:0 0 10px;
  font-size:14px;
  letter-spacing:-.2px;
  color:var(--text);
}
.footer-col p{
  margin:10px 0 0;
  color:var(--muted);
  line-height:1.7;
  font-weight:650;
}
.footer-link-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-link-list a{
  color:var(--muted);
  font-weight:700;
  padding:10px 12px;
  border-radius:14px;
  border:1px solid rgba(2,6,23,.10);
  background:rgba(255,255,255,.72);
  font-size:13.5px;
}
.footer-link-list a:hover{
  color:var(--text);
  background:rgba(14,165,233,.10);
  border-color:rgba(14,165,233,.22);
}
.footer-bottom{
  border-top:1px solid rgba(2,6,23,.10);
  padding:18px 0 24px;
}
.footer-bottom p{
  margin:0;
  color:var(--muted);
  font-weight:700;
  font-size:13.5px;
  line-height:1.6;
}

/* Responsive */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-title{ font-size:40px; }
  .grid-3{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .principle-tiles{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .nav-links, .nav-cta .btn-quiet{ display:none; }
  .burger{ display:inline-flex; align-items:center; justify-content:center; }
  .mobile-panel{ display:block; }
  .grid-2, .grid-3{ grid-template-columns: 1fr; }
  .hero{ padding:40px 0 20px; }
  .hero-title{ font-size:34px; }
  .whatsapp-fab{ display:block; }
}

@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  .btn{ transition:none; }
  .tile{ transition:none; }
}