/* ============================================================
   KLASLINK — product landing
   Theme: "Indigo night-sky + constellation thread"
   Deep indigo · chalk-white · warm-gold accent (brand-quiet premium)
   Type: Plus Jakarta Sans (display) · Inter (body)
   Motif: the persistent per-student timeline = a glowing thread that
   connects a child's moments across classes, years and schools.
   ============================================================ */

:root{
  --night:#0a0e20;
  --night-2:#0e1430;
  --night-card:#121a3a;
  --night-card-2:#0d1430;
  --chalk:#f4f6fb;
  --chalk-dim:rgba(244,246,251,.66);
  --chalk-faint:rgba(244,246,251,.34);
  --hair:rgba(244,246,251,.10);
  --hair-strong:rgba(244,246,251,.2);
  --gold:#f5c451;
  --gold-deep:#e0a92e;
  --gold-glow:rgba(245,196,81,.35);
  --indigo:#6d7bff;
  --indigo-soft:rgba(109,123,255,.18);
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--night);
  color:var(--chalk);
  font-family:"Inter",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.65;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ---------- Background layers ---------- */
.bgwrap{position:fixed;inset:0;z-index:-3;
  background:
    radial-gradient(120% 90% at 80% -10%, rgba(109,123,255,.12), transparent 55%),
    radial-gradient(120% 100% at 10% 110%, rgba(245,196,81,.06), transparent 55%),
    linear-gradient(180deg,#0b1130 0%, var(--night) 55%, #070a18 100%);}
.star-canvas{position:fixed;inset:0;z-index:-2;pointer-events:none}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.04;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%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)'/%3E%3C/svg%3E");}

/* ---------- Type primitives ---------- */
.jak{font-family:"Plus Jakarta Sans",sans-serif}
.eyebrow{font-family:"Plus Jakarta Sans",sans-serif;font-size:.78rem;letter-spacing:.22em;font-weight:700;
  text-transform:uppercase;color:var(--gold);display:inline-flex;align-items:center;gap:.7em}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);display:inline-block}

h1,h2,h3,h4{font-family:"Plus Jakarta Sans",sans-serif;font-weight:800;line-height:1.08;letter-spacing:-.02em}
.display{font-size:clamp(2.5rem,6.2vw,5.2rem)}
.display .accent{color:var(--gold)}
.h-big{font-size:clamp(2rem,4.4vw,3.4rem)}
.h-mid{font-size:clamp(1.2rem,2.2vw,1.6rem)}
.lede{font-size:clamp(1.02rem,1.7vw,1.3rem);color:var(--chalk-dim);max-width:56ch;line-height:1.62}
.lede strong{color:var(--chalk);font-weight:600}

/* ---------- Layout ---------- */
section{position:relative;padding:clamp(72px,11vh,140px) 24px}
.inner{max-width:var(--maxw);margin:0 auto}
.section-head{max-width:64ch;margin-bottom:clamp(36px,6vh,64px)}
.section-head .lede{margin-top:18px}

/* ---------- Nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;
  transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(10,14,32,.8);backdrop-filter:blur(14px);border-bottom-color:var(--hair)}
.nav-inner{max-width:var(--maxw);margin:0 auto;height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.brand{display:flex;align-items:center;gap:12px}
.mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(150deg,var(--indigo),#3a45b8);
  display:grid;place-items:center;box-shadow:0 8px 22px rgba(109,123,255,.3)}
.mark svg{width:22px;height:22px;stroke:var(--gold);fill:none;stroke-width:2}
.brand-text{font-family:"Plus Jakarta Sans",sans-serif;font-weight:800;letter-spacing:-.01em;font-size:1.06rem}
.brand-text em{font-style:normal;color:var(--gold)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-link{font-size:.88rem;color:var(--chalk-dim);transition:color .25s}
.nav-link:hover{color:var(--chalk)}
.nav-cta{font-family:"Plus Jakarta Sans",sans-serif;font-weight:700;font-size:.82rem;
  padding:10px 18px;border-radius:9px;background:var(--gold);color:#241a02;
  transition:transform .25s var(--ease),box-shadow .25s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 26px var(--gold-glow)}
.nav-back{font-family:"Plus Jakarta Sans",sans-serif;font-weight:600;font-size:.74rem;letter-spacing:.06em;
  text-transform:uppercase;color:var(--chalk-faint);transition:color .25s}
.nav-back:hover{color:var(--gold)}
.hamburger{display:none}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding-top:120px;overflow:hidden}
.hero .eyebrow{margin-bottom:24px}
.hero h1{margin-bottom:20px;max-width:16ch}
.hero .lede{margin-bottom:34px}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}
.btn{font-family:"Plus Jakarta Sans",sans-serif;font-weight:700;font-size:.92rem;
  padding:15px 26px;border-radius:11px;transition:transform .25s var(--ease),box-shadow .25s,border-color .25s,color .25s;
  display:inline-flex;align-items:center;gap:10px}
.btn-primary{background:var(--gold);color:#241a02}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 34px var(--gold-glow)}
.btn-ghost{border:1px solid var(--hair-strong);color:var(--chalk)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-3px)}

/* the hero constellation thread */
.thread-wrap{margin-top:54px;position:relative;height:120px}
.thread-svg{width:100%;height:100%;overflow:visible}
.thread-path{fill:none;stroke:url(#threadGrad);stroke-width:2.5;stroke-linecap:round;
  filter:drop-shadow(0 0 6px var(--gold-glow));
  stroke-dasharray:1400;stroke-dashoffset:1400}
.hero.in .thread-path{animation:draw 2.4s var(--ease) .5s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.node{fill:var(--night);stroke:var(--gold);stroke-width:2.5;opacity:0}
.hero.in .node{animation:pop .5s var(--ease) forwards}
.node-glow{fill:var(--gold);opacity:0}
.hero.in .node-glow{animation:glow 2s ease-in-out infinite}
.node-label{font-family:"Plus Jakarta Sans",sans-serif;font-size:11px;font-weight:600;fill:var(--chalk-dim);opacity:0}
.hero.in .node-label{animation:fadeIn .6s var(--ease) forwards}
@keyframes pop{from{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}
@keyframes glow{0%,100%{opacity:.15;r:14}50%{opacity:.35;r:18}}
@keyframes fadeIn{to{opacity:1}}

/* ---------- Persistent timeline explainer ---------- */
.keystone{background:
  radial-gradient(120% 130% at 50% 0%, var(--indigo-soft), transparent 55%);
  border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.keystone .badge{display:inline-block;font-family:"Plus Jakarta Sans",sans-serif;font-weight:700;font-size:.72rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--indigo);background:var(--indigo-soft);
  border:1px solid rgba(109,123,255,.3);padding:.5rem 1.1rem;border-radius:999px;margin-bottom:20px}
.timeline-strip{display:flex;align-items:stretch;gap:0;margin-top:46px;flex-wrap:nowrap;overflow-x:auto;padding-bottom:10px}
.tl-step{flex:1 1 0;min-width:150px;position:relative;padding:0 12px}
.tl-step::before{content:"";position:absolute;top:13px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-deep))}
.tl-step:first-child::before{left:50%}
.tl-step:last-child::before{right:50%}
.tl-dot{position:relative;width:28px;height:28px;border-radius:50%;background:var(--night);
  border:2.5px solid var(--gold);display:grid;place-items:center;margin:0 auto 16px;z-index:1}
.tl-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--gold);box-shadow:0 0 10px var(--gold)}
.tl-step h4{font-size:1rem;text-align:center;margin-bottom:6px}
.tl-step p{text-align:center;font-size:.82rem;color:var(--chalk-dim);line-height:1.5}

/* ---------- Feature cards ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:linear-gradient(165deg,var(--night-card),var(--night-card-2));border:1px solid var(--hair);
  border-radius:18px;padding:28px 24px;transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.card:hover{transform:translateY(-6px);border-color:rgba(245,196,81,.4);box-shadow:0 22px 50px rgba(0,0,0,.5)}
.card .ci{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--indigo-soft)}
.card .ci svg{width:24px;height:24px;fill:none;stroke:var(--gold);stroke-width:1.8}
.card h4{font-size:1.16rem;margin-bottom:8px}
.card p{color:var(--chalk-dim);font-size:.9rem;line-height:1.55}

/* ---------- Everything-in-the-box checklist ---------- */
.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:30px 28px}
.fl-col h4{font-family:"Plus Jakarta Sans",sans-serif;font-weight:700;font-size:1.06rem;margin-bottom:14px;color:var(--chalk)}
.fl-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.fl-col li{position:relative;padding-left:24px;font-size:.9rem;color:var(--chalk-dim);line-height:1.5}
.fl-col li::before{content:"";position:absolute;left:0;top:.5em;width:12px;height:7px;
  border-left:2px solid var(--gold);border-bottom:2px solid var(--gold);transform:rotate(-45deg)}
.fl-coming{margin-top:38px;text-align:center;font-family:"Plus Jakarta Sans",sans-serif;font-size:.92rem;color:var(--chalk-faint)}
.fl-coming strong{color:var(--gold);font-weight:600}
@media (max-width:900px){.feature-list{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.feature-list{grid-template-columns:1fr}}

/* ---------- Audience band ---------- */
.aud{background:linear-gradient(180deg,transparent,rgba(109,123,255,.05))}
.aud-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.aud-card{border:1px solid var(--hair);border-radius:18px;padding:32px 28px;text-align:center;
  background:linear-gradient(165deg,var(--night-card),var(--night-card-2))}
.aud-card .ico{width:54px;height:54px;border-radius:50%;margin:0 auto 18px;display:grid;place-items:center;
  background:var(--indigo-soft)}
.aud-card .ico svg{width:28px;height:28px;stroke:var(--gold);fill:none;stroke-width:1.7}
.aud-card h4{font-size:1.2rem;margin-bottom:10px}
.aud-card p{color:var(--chalk-dim);font-size:.9rem}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tier{border:1px solid var(--hair);border-radius:20px;padding:34px 28px;
  background:linear-gradient(170deg,var(--night-card),var(--night-card-2));
  display:flex;flex-direction:column;gap:16px;transition:transform .4s var(--ease)}
.tier.feature{border-color:rgba(245,196,81,.5);box-shadow:0 0 0 1px rgba(245,196,81,.18),0 24px 60px rgba(0,0,0,.5)}
.tier:hover{transform:translateY(-6px)}
.tier .t-name{font-family:"Plus Jakarta Sans",sans-serif;font-weight:700;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.tier .t-price{font-family:"Plus Jakarta Sans",sans-serif;font-weight:800;font-size:2rem}
.tier .t-price small{font-weight:400;font-size:.8rem;color:var(--chalk-faint)}
.tier ul{list-style:none;display:flex;flex-direction:column;gap:10px;margin:4px 0 8px}
.tier li{font-size:.88rem;color:var(--chalk-dim);padding-left:24px;position:relative}
.tier li::before{content:"";position:absolute;left:0;top:.5em;width:12px;height:7px;border-left:2px solid var(--gold);
  border-bottom:2px solid var(--gold);transform:rotate(-45deg)}
.tier .btn{margin-top:auto;justify-content:center}
.price-note{text-align:center;margin-top:22px;font-family:"Plus Jakarta Sans",sans-serif;font-size:.74rem;
  letter-spacing:.04em;color:var(--chalk-faint)}

/* ---------- Contact ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.contact form{display:flex;flex-direction:column;gap:14px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-family:"Plus Jakarta Sans",sans-serif;font-weight:600;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--chalk-faint)}
.field input,.field textarea{background:var(--night-2);border:1px solid var(--hair);border-radius:11px;
  padding:13px 15px;color:var(--chalk);font-family:"Inter",sans-serif;font-size:.94rem;transition:border-color .25s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--gold)}
.field textarea{resize:vertical;min-height:110px}
.contact-or{display:flex;align-items:center;gap:12px;margin:20px 0 14px;color:var(--chalk-faint);
  font-family:"Plus Jakarta Sans",sans-serif;font-weight:600;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase}
.contact-or::before,.contact-or::after{content:"";flex:1;height:1px;background:var(--hair)}
.contact-direct{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.wa-btn{background:#25D366;color:#06281a;border:none}
.wa-btn:hover{background:#22c35e;color:#06281a;transform:translateY(-3px);box-shadow:0 12px 30px rgba(37,211,102,.3)}
.wa-btn svg{width:20px;height:20px}
.contact-email{font-size:.9rem;color:var(--chalk-dim);border-bottom:1px solid var(--hair);
  transition:color .25s,border-color .25s}
.contact-email:hover{color:var(--gold);border-color:var(--gold)}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--hair);padding:48px 24px}
.foot-inner{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot-links{display:flex;gap:24px;flex-wrap:wrap}
.foot-links a{font-size:.84rem;color:var(--chalk-dim);transition:color .25s}
.foot-links a:hover{color:var(--gold)}
.foot-copy{font-family:"Plus Jakarta Sans",sans-serif;font-size:.74rem;letter-spacing:.04em;color:var(--chalk-faint)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);filter:blur(4px);transition:opacity .8s var(--ease),transform .8s var(--ease),filter .8s var(--ease)}
.reveal.in{opacity:1;transform:none;filter:blur(0)}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}.reveal.d6{transition-delay:.48s}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .grid,.aud-grid,.price-grid{grid-template-columns:1fr 1fr}
  .contact-wrap{grid-template-columns:1fr}
  .nav-links{position:fixed;inset:72px 0 auto 0;background:rgba(10,14,32,.97);backdrop-filter:blur(16px);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 20px;border-bottom:1px solid var(--hair);
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:.3s var(--ease)}
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:13px 0;width:100%;border-bottom:1px solid var(--hair)}
  .nav-cta{background:none;color:var(--gold)!important;padding:13px 0}
  .hamburger{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
  .hamburger span{width:24px;height:2px;background:var(--chalk);transition:.3s}
}
@media (max-width:560px){
  .grid,.aud-grid,.price-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important}
  .reveal{opacity:1;transform:none;filter:none}
  .thread-path{stroke-dashoffset:0}
  .node,.node-label{opacity:1}
  html{scroll-behavior:auto}
}