:root{
  --ink:#141a2b; --ink-2:#3a4254; --muted:#6b7488;
  --blue:#4e73df; --blue-deep:#2b3a86; --blue-soft:#6f8bff; --indigo:#3a5bd0;
  --wa:#25d366; --wa-deep:#128c4b;
  --bg:#f6f8fd; --surface:#ffffff; --line:#e7ecf6;
  --radius:20px; --shadow:0 18px 48px rgba(24,33,66,.10); --shadow-lg:0 30px 70px rgba(24,33,66,.16);
  --display:'Sora', 'Plus Jakarta Sans', sans-serif;
  --body:'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--body);color:var(--ink-2);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;letter-spacing:-.011em;overflow-x:hidden;overflow-wrap:break-word;word-break:break-word}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
h1,h2,h3{font-family:var(--display);color:var(--ink);font-weight:700;line-height:1.08;letter-spacing:-.03em;text-wrap:balance}
p{text-wrap:pretty}
section{position:relative}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);background:rgba(78,115,223,.09);padding:7px 14px;border-radius:100px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--body);font-weight:700;font-size:.96rem;border:none;cursor:pointer;border-radius:13px;padding:14px 26px;transition:transform .18s,box-shadow .2s,background .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-soft));color:#fff;box-shadow:0 12px 26px rgba(78,115,223,.36)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(78,115,223,.5)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-light{background:#fff;color:var(--blue-deep);box-shadow:var(--shadow)}
.btn-light:hover{transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-wa{background:linear-gradient(135deg,var(--wa),var(--wa-deep));color:#fff;box-shadow:0 12px 26px rgba(37,211,102,.34)}
.btn-wa:hover{transform:translateY(-2px)}

/* ---------- NAV ---------- */
header.nav{position:sticky;top:0;z-index:60;backdrop-filter:saturate(180%) blur(14px);background:rgba(246,248,253,.82);border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s}
header.nav.scrolled{border-color:var(--line);box-shadow:0 6px 24px rgba(24,33,66,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;font-size:1.18rem;color:var(--ink);letter-spacing:-.02em}
.logo .mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue-deep),var(--blue-soft));color:#fff;display:grid;place-items:center;font-size:1.05rem;box-shadow:0 8px 18px rgba(43,58,134,.32)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a.l{font-weight:600;font-size:.94rem;color:var(--ink-2);transition:color .2s}
.nav-links a.l:hover{color:var(--blue)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-cta a.login{font-weight:700;font-size:.94rem;color:var(--ink)}
.burger{display:none;background:none;border:none;font-size:1.4rem;color:var(--ink);cursor:pointer}

/* ---------- HERO ---------- */
.hero{padding:clamp(56px,9vw,104px) 0 clamp(60px,8vw,96px);background:
  radial-gradient(1100px 540px at 78% -10%, rgba(111,139,255,.22), transparent 60%),
  radial-gradient(820px 520px at 8% 8%, rgba(78,115,223,.14), transparent 55%);
  overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.hero h1{font-size:clamp(2.5rem,5.4vw,4rem);margin:22px 0 0;font-weight:800;letter-spacing:-.035em}
.hero h1 .grad{background:linear-gradient(120deg,var(--blue-deep),var(--blue),var(--blue-soft));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.sub{font-size:clamp(1.05rem,1.7vw,1.24rem);color:var(--ink-2);margin:22px 0 30px;max-width:36ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;align-items:center;gap:18px;margin-top:26px;flex-wrap:wrap;font-size:.86rem;color:var(--muted);font-weight:600}
.hero-trust .dot{display:flex;align-items:center;gap:7px}
.hero-trust i{color:var(--wa)}

/* ---------- LEARNING DIAGRAM (signature visual) ---------- */
.diagram{position:relative;background:linear-gradient(165deg,#222a63 0%,#2b3a86 55%,#3a5bd0 100%);border-radius:26px;padding:30px 26px;color:#fff;box-shadow:var(--shadow-lg);overflow:hidden;isolation:isolate}
.diagram::before{content:"";position:absolute;inset:0;z-index:-1;opacity:.5;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E")}
.diagram::after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(111,139,255,.5),transparent 70%);top:-150px;right:-120px;z-index:-1;filter:blur(8px)}
.dg-label{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.62);font-weight:700;margin-bottom:14px}
.dg-cols{display:grid;grid-template-columns:minmax(0,.9fr) auto minmax(0,1.15fr);gap:12px;align-items:center}
.dg-sources{display:grid;gap:10px}
.chip{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:11px 13px;font-size:.84rem;font-weight:600;color:#fff;line-height:1.2;min-width:0;animation:floaty 4s ease-in-out infinite}
.chip i{width:26px;height:26px;border-radius:7px;background:rgba(255,255,255,.16);display:grid;place-items:center;font-size:.8rem;flex:none}
.chip:nth-child(2){animation-delay:.6s}.chip:nth-child(3){animation-delay:1.2s}.chip:nth-child(4){animation-delay:1.8s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.dg-core{display:grid;place-items:center;text-align:center}
.core-orb{width:84px;height:84px;border-radius:24px;background:linear-gradient(135deg,#fff,#dbe4ff);color:var(--blue-deep);display:grid;place-items:center;font-size:2rem;box-shadow:0 0 0 8px rgba(255,255,255,.12),0 18px 40px rgba(0,0,0,.3);position:relative}
.core-orb::after{content:"";position:absolute;inset:-8px;border-radius:30px;border:2px dashed rgba(255,255,255,.4);animation:spin 14s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.core-orb b{position:absolute;inset:0;border-radius:24px;animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,255,255,.4)}100%{box-shadow:0 0 0 22px rgba(255,255,255,0)}}
.dg-core small{display:block;margin-top:12px;font-weight:700;font-size:.82rem;color:rgba(255,255,255,.92)}
.dg-out{display:grid;gap:10px}
.out-pill{display:flex;align-items:center;gap:9px;border-radius:12px;padding:10px 12px;font-size:.82rem;font-weight:700;color:#fff;line-height:1.2;min-width:0}
.out-pill i{flex:none}
.out-pill.web{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2)}
.out-pill.api{background:linear-gradient(135deg,var(--blue-soft),var(--blue));box-shadow:0 6px 16px rgba(78,115,223,.4)}
.out-pill.wa{background:linear-gradient(135deg,rgba(37,211,102,.95),rgba(18,140,75,.95))}
.out-pill i{font-size:1rem}
.dg-flow{height:2px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);background-size:200% 100%;animation:flow 2.2s linear infinite;margin:18px 0 4px;border-radius:2px}
@keyframes flow{to{background-position:-200% 0}}
.dg-typing{display:flex;align-items:center;gap:7px;font-size:.8rem;color:rgba(255,255,255,.8);font-weight:600;margin-top:6px}
.dg-typing span{width:7px;height:7px;border-radius:50%;background:#fff;opacity:.5;animation:blink 1.4s infinite}
.dg-typing span:nth-child(2){animation-delay:.2s}.dg-typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}

/* ---------- STATS BAR ---------- */
.stats{background:var(--ink);color:#fff;padding:30px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat .n{font-family:var(--display);font-size:clamp(1.7rem,3vw,2.4rem);font-weight:700;background:linear-gradient(120deg,#fff,#b9c7ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .t{font-size:.84rem;color:rgba(255,255,255,.66);font-weight:600;margin-top:4px}

/* ---------- SECTION SHELL ---------- */
.sec{padding:clamp(64px,9vw,104px) 0}
.sec-head{max-width:680px;margin:0 auto 54px;text-align:center}
.sec-head h2{font-size:clamp(2rem,4vw,2.85rem);margin:16px 0 14px}
.sec-head p{font-size:1.08rem;color:var(--muted)}

/* ---------- STEPS ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;position:relative;transition:transform .25s,box-shadow .25s}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step .num{font-family:var(--display);font-size:.9rem;font-weight:700;color:#fff;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue-deep),var(--blue-soft));display:grid;place-items:center;margin-bottom:18px}
.step h3{font-size:1.28rem;margin-bottom:8px}
.step p{font-size:.96rem;color:var(--muted)}
.step .ic{position:absolute;top:28px;right:26px;font-size:1.3rem;color:var(--line)}

/* ---------- FEATURES ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(78,115,223,.3)}
.card .fi{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;font-size:1.25rem;color:#fff;margin-bottom:16px;background:linear-gradient(135deg,var(--blue),var(--blue-soft));box-shadow:0 10px 22px rgba(78,115,223,.28)}
.card.green .fi{background:linear-gradient(135deg,var(--wa),var(--wa-deep));box-shadow:0 10px 22px rgba(37,211,102,.28)}
.card h3{font-size:1.18rem;margin-bottom:7px}
.card p{font-size:.93rem;color:var(--muted)}

/* ---------- WHATSAPP SPLIT ---------- */
.wa-sec{background:linear-gradient(165deg,#0f2419,#11331f 60%,#0d2a18);color:#fff}
.wa-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}
.wa-grid h2{color:#fff;font-size:clamp(2rem,4vw,2.7rem);margin:16px 0 16px}
.wa-grid p.lead{color:rgba(255,255,255,.78);font-size:1.08rem;margin-bottom:24px}
.wa-list{list-style:none;display:grid;gap:14px;margin-bottom:30px}
.wa-list li{display:flex;gap:13px;align-items:flex-start;font-weight:500;color:rgba(255,255,255,.92)}
.wa-list i{color:var(--wa);margin-top:3px;font-size:1.05rem;flex:none}
.eyebrow.wa-eye{color:#7dffb0;background:rgba(37,211,102,.14)}
/* phone mock */
.phone{width:300px;max-width:100%;margin:0 auto;background:#0b141a;border-radius:34px;padding:12px;box-shadow:0 40px 90px rgba(0,0,0,.5);border:1px solid rgba(255,255,255,.08)}
.phone-top{background:#075e54;border-radius:24px 24px 0 0;padding:14px 16px;display:flex;align-items:center;gap:11px}
.phone-top .av{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--wa),var(--wa-deep));display:grid;place-items:center;color:#fff;font-size:.95rem}
.phone-top .nm{font-weight:700;font-size:.92rem;color:#fff}
.phone-top .st{font-size:.72rem;color:rgba(255,255,255,.7)}
.phone-body{background:#0b141a url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Ccircle cx='4' cy='4' r='1' fill='%23ffffff08'/%3E%3C/svg%3E");padding:18px 14px;display:grid;gap:10px;border-radius:0 0 24px 24px;min-height:330px;align-content:start}
.bub{max-width:80%;padding:9px 13px;border-radius:14px;font-size:.84rem;line-height:1.45;animation:pop .5s both}
.bub.in{background:#1f2c33;color:#e9edf0;border-top-left-radius:4px;justify-self:start}
.bub.out{background:#075e54;color:#fff;border-top-right-radius:4px;justify-self:end}
.bub.out.b2{animation-delay:.5s}.bub.in.b3{animation-delay:1s}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}

/* ---------- PRICING ---------- */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;align-items:stretch}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.plan:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.plan.feat{border:2px solid var(--blue);box-shadow:0 22px 50px rgba(78,115,223,.2);position:relative}
.plan.feat .tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--blue),var(--blue-soft));color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:6px 14px;border-radius:100px;white-space:nowrap}
.plan .pn{font-family:var(--display);font-weight:700;font-size:1.2rem;color:var(--ink)}
.plan .pr{font-family:var(--display);font-size:2.3rem;font-weight:700;color:var(--ink);margin:10px 0 2px}
.plan .pr small{font-size:.92rem;color:var(--muted);font-weight:600;font-family:var(--body)}
.plan .pd{font-size:.86rem;color:var(--muted);margin-bottom:18px;min-height:38px}
.plan ul{list-style:none;display:grid;gap:10px;margin-bottom:24px;flex:1}
.plan li{display:flex;gap:9px;font-size:.9rem;align-items:flex-start}
.plan li i{color:var(--wa);margin-top:3px;font-size:.85rem;flex:none}
.plan li.off{color:var(--muted)}.plan li.off i{color:#c5ccda}
.plan .btn{width:100%}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:14px}
details.qa{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 22px;transition:box-shadow .2s,border-color .2s}
details.qa[open]{box-shadow:var(--shadow);border-color:rgba(78,115,223,.3)}
details.qa summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;font-family:var(--display);font-weight:600;font-size:1.08rem;color:var(--ink)}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary i{color:var(--blue);transition:transform .25s;flex:none}
details.qa[open] summary i{transform:rotate(45deg)}
details.qa .ans{padding:0 0 20px;color:var(--muted);font-size:.96rem}

/* ---------- CTA BAND ---------- */
.cta-band{background:linear-gradient(135deg,var(--blue-deep),var(--indigo) 55%,var(--blue-soft));color:#fff;text-align:center;border-radius:30px;padding:clamp(44px,7vw,72px) 24px;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 70%);top:-200px;right:-120px}
.cta-band h2{color:#fff;font-size:clamp(2rem,4vw,2.8rem);margin-bottom:14px;position:relative}
.cta-band p{color:rgba(255,255,255,.85);font-size:1.1rem;max-width:50ch;margin:0 auto 28px;position:relative}
.cta-band .hero-cta{justify-content:center;position:relative}

/* ---------- FOOTER ---------- */
footer.ft{background:var(--ink);color:rgba(255,255,255,.66);padding:60px 0 30px}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.ft .logo{color:#fff;margin-bottom:14px}
.ft p.blurb{font-size:.9rem;max-width:34ch}
.ft h4{color:#fff;font-family:var(--body);font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px;font-weight:700}
.ft ul{list-style:none;display:grid;gap:10px}
.ft ul a{font-size:.92rem;transition:color .2s}
.ft ul a:hover{color:#fff}
.ft-bot{display:flex;justify-content:space-between;align-items:center;padding-top:24px;font-size:.84rem;flex-wrap:wrap;gap:10px}

/* ---------- REVEAL ANIM ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.fade-load{opacity:0;transform:translateY(20px);animation:fadeUp .8s cubic-bezier(.2,.7,.2,1) forwards}
.d1{animation-delay:.05s}.d2{animation-delay:.18s}.d3{animation-delay:.31s}.d4{animation-delay:.44s}
@keyframes fadeUp{to{opacity:1;transform:none}}

/* ---------- RESPONSIVE ---------- */
@media(max-width:980px){
  .hero-grid,.wa-grid{grid-template-columns:1fr;gap:40px}
  .diagram{order:2}
  .steps,.feat-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid,.price-grid{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media(max-width:600px){
  .feat-grid,.steps,.price-grid,.stats-grid{grid-template-columns:1fr}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .nav-cta a.login{display:none}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px}
  .dg-cols{grid-template-columns:1fr}
  .dg-core{margin:14px 0}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}.fade-load{opacity:1;transform:none}}