/* =========================================================
   Brilliant 아카데미 — 러닝 저니 템플릿
   Self-contained, no frameworks / CDNs / external assets.
   ========================================================= */

/* ---------- Design tokens ---------- */
:root{
  --violet:#7c5cff;
  --blue:#3b82f6;
  --teal:#22d3ee;
  --grad:linear-gradient(120deg,#7c5cff 0%,#3b82f6 52%,#22d3ee 100%);
  --grad-soft:linear-gradient(120deg,rgba(124,92,255,.14),rgba(59,130,246,.12),rgba(34,211,238,.14));

  --ink:#151827;
  --ink-2:#3d4356;
  --muted:#6b7280;
  --line:rgba(21,24,39,.10);

  --bg:#ffffff;
  --bg-alt:#f5f7ff;
  --dark:#101527;
  --dark-2:#161c33;
  --on-dark:#eef2ff;
  --on-dark-mut:#a6b0d6;

  --card:#ffffff;
  --shadow:0 18px 44px -20px rgba(31,38,80,.30);
  --shadow-sm:0 8px 24px -14px rgba(31,38,80,.35);

  --radius:20px;
  --radius-sm:12px;
  --bar-h:64px;

  --wrap:1160px;
  --gutter:clamp(18px,5vw,48px);

  --font:"Segoe UI",system-ui,-apple-system,"Malgun Gothic","Apple SD Gothic Neo",
         "Noto Sans KR",Roboto,Helvetica,Arial,sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  scroll-behavior:smooth;
  scroll-padding-top:var(--bar-h);
  -webkit-text-size-adjust:100%;
}
html.snap{scroll-snap-type:y proximity}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  overflow-x:hidden;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
ul{list-style:none}

:focus-visible{outline:3px solid var(--violet);outline-offset:3px;border-radius:6px}

/* ---------- Layout helpers ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.eyebrow{
  display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.16em;
  text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:14px;
}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
h1,h2,h3{line-height:1.14;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,6vw,4rem)}
h2{font-size:clamp(1.7rem,4vw,2.8rem)}
h3{font-size:clamp(1.15rem,2.2vw,1.4rem)}
p.lead{font-size:clamp(1.02rem,2vw,1.24rem);color:var(--ink-2)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-weight:800;font-size:1rem;
  padding:.85em 1.5em;border-radius:999px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s;
  will-change:transform;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px -10px rgba(124,92,255,.6)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 34px -10px rgba(124,92,255,.75)}
.btn-ghost{border:2px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--violet);color:var(--violet);transform:translateY(-3px)}
.on-dark .btn-ghost{border-color:rgba(255,255,255,.28);color:var(--on-dark)}
.on-dark .btn-ghost:hover{border-color:#fff;color:#fff}
.btn-lg{font-size:1.08rem;padding:1em 1.9em}

/* ---------- Top bar ---------- */
.bar{
  position:fixed;inset:0 0 auto 0;height:var(--bar-h);z-index:60;
  display:flex;align-items:center;
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s;
}
.bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.15rem;letter-spacing:-.02em}
.brand .mark{width:32px;height:32px;flex:0 0 auto}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  padding:.5em .85em;border-radius:999px;font-weight:700;font-size:.95rem;color:var(--ink-2);
  transition:color .2s,background .2s;
}
.nav a:hover,.nav a.active{color:var(--violet);background:rgba(124,92,255,.10)}
.nav .btn{margin-left:8px;padding:.6em 1.2em;color:#fff}
.nav .btn:hover{background:var(--grad)}

.burger{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--line);
}
.burger span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Right dot nav ---------- */
.dots{
  position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:55;
  display:flex;flex-direction:column;gap:16px;
}
.dots a{
  display:flex;align-items:center;gap:10px;flex-direction:row-reverse;
  color:var(--ink-2);font-weight:700;font-size:.8rem;
}
.dots .dot{
  width:13px;height:13px;border-radius:50%;
  border:2px solid rgba(124,92,255,.45);background:transparent;
  transition:transform .3s var(--ease),background .3s,border-color .3s;
  flex:0 0 auto;
}
.dots .lbl{
  opacity:0;transform:translateX(6px);transition:opacity .25s,transform .25s;
  background:var(--card);padding:2px 10px;border-radius:999px;box-shadow:var(--shadow-sm);
  white-space:nowrap;
}
.dots a:hover .lbl,.dots a.active .lbl{opacity:1;transform:none}
.dots a.active .dot{
  background:var(--grad);border-color:transparent;transform:scale(1.5);
  animation:dotPulse 1.8s var(--ease) infinite;
}
@keyframes dotPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(124,92,255,.45)}
  50%{box-shadow:0 0 0 8px rgba(124,92,255,0)}
}

/* ---------- Panels (index) ---------- */
.panel{
  min-height:100vh;scroll-snap-align:start;
  display:flex;align-items:center;
  padding-block:calc(var(--bar-h) + 40px) 56px;
  position:relative;overflow:hidden;
}
.panel--dark{background:radial-gradient(1200px 700px at 80% -10%,rgba(124,92,255,.28),transparent 60%),var(--dark);color:var(--on-dark)}
.panel--dark .lead,.panel--dark p{color:var(--on-dark-mut)}
.panel--alt{background:var(--bg-alt)}
.on-dark{color:var(--on-dark)}

.panel__grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,64px);
  align-items:center;width:100%;
}
.panel__art{position:relative}
.panel__art svg{width:100%;height:auto;filter:drop-shadow(0 24px 40px rgba(31,38,80,.22))}

.stage-tag{
  display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:.82rem;
  letter-spacing:.12em;padding:.4em .9em;border-radius:999px;margin-bottom:16px;
  background:rgba(124,92,255,.12);color:var(--violet);
}
.panel--dark .stage-tag{background:rgba(255,255,255,.10);color:var(--teal)}

/* Hero specifics */
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero__meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:30px;font-size:.9rem;color:var(--muted)}
.hero__meta b{display:block;font-size:1.5rem;font-weight:900;color:var(--ink)}

/* Floating decorative shapes */
.floaty{position:absolute;border-radius:50%;filter:blur(2px);opacity:.5;pointer-events:none;animation:floatY 7s ease-in-out infinite}
.floaty--1{width:90px;height:90px;background:radial-gradient(circle,#7c5cff,transparent 70%);top:14%;left:6%}
.floaty--2{width:130px;height:130px;background:radial-gradient(circle,#22d3ee,transparent 70%);bottom:12%;right:10%;animation-delay:1.5s}
.floaty--3{width:60px;height:60px;background:radial-gradient(circle,#3b82f6,transparent 70%);top:22%;right:24%;animation-delay:.8s}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-26px)}}

/* Feature bullets */
.ticks{display:grid;gap:12px;margin-top:22px}
.ticks li{display:flex;gap:12px;align-items:flex-start;font-weight:600;color:var(--ink-2)}
.panel--dark .ticks li{color:var(--on-dark-mut)}
.ticks svg{flex:0 0 auto;margin-top:3px}

/* ---------- Stats (count-up) ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:18px;margin:34px 0}
.stat{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:24px;text-align:center;
}
.panel--alt .stat,.section .stat{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.stat .num{font-size:clamp(2rem,5vw,2.8rem);font-weight:900;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .cap{margin-top:8px;font-size:.9rem;font-weight:700;color:var(--muted)}
.panel--dark .stat .cap{color:var(--on-dark-mut)}

/* ---------- Reviews ---------- */
.reviews{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;margin-top:26px}
.review{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:22px;
}
.panel--alt .review,.section .review{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.review p{font-size:.98rem;color:var(--on-dark-mut)}
.panel--alt .review p,.section .review p{color:var(--ink-2)}
.review .who{display:flex;align-items:center;gap:10px;margin-top:16px;font-weight:800;font-size:.9rem}
.review .ava{width:36px;height:36px;border-radius:50%;background:var(--grad);flex:0 0 auto;
  display:grid;place-items:center;color:#fff;font-weight:900}
.stars{color:#fbbf24;letter-spacing:2px;font-size:.9rem}

/* final CTA within panel */
.final-cta{text-align:center;max-width:640px;margin:44px auto 0}
.final-cta .btn{margin-top:20px}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}

/* SVG draw */
.draw path,.draw circle,.draw line,.draw polyline,.draw rect{
  stroke-dasharray:var(--len,600);stroke-dashoffset:var(--len,600);
  transition:stroke-dashoffset 1.6s var(--ease);
}
.draw.in path,.draw.in circle,.draw.in line,.draw.in polyline,.draw.in rect{stroke-dashoffset:0}

/* ============ Subpage (normal scroll) ============ */
.subhead{
  padding-block:calc(var(--bar-h) + 56px) 40px;
  background:var(--grad-soft);
  border-bottom:1px solid var(--line);
}
.subhead .lead{max-width:640px}
.section{padding-block:clamp(48px,8vw,88px)}
.section--alt{background:var(--bg-alt)}
.section__head{max-width:680px;margin-bottom:40px}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card .ic{width:56px;height:56px;border-radius:16px;background:var(--grad-soft);
  display:grid;place-items:center;margin-bottom:18px}
.card h3{margin-bottom:8px}
.card p{color:var(--ink-2);font-size:.98rem}
.card .price{margin-top:auto;padding-top:16px;font-weight:900;font-size:1.3rem}
.card .price small{font-weight:700;font-size:.85rem;color:var(--muted)}
.card ul.mini{display:grid;gap:8px;margin-top:14px}
.card ul.mini li{display:flex;gap:8px;font-size:.92rem;color:var(--ink-2)}
.badge{position:absolute;top:16px;right:16px;font-size:.72rem;font-weight:800;
  background:var(--grad);color:#fff;padding:.3em .7em;border-radius:999px}
.card{position:relative}

/* curriculum timeline */
.timeline{display:grid;gap:0;position:relative;margin-top:8px}
.tl-item{display:grid;grid-template-columns:auto 1fr;gap:20px;padding-block:20px;position:relative}
.tl-item:not(:last-child)::before{content:"";position:absolute;left:19px;top:44px;bottom:-20px;width:2px;background:var(--line)}
.tl-num{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#fff;
  font-weight:900;display:grid;place-items:center;flex:0 0 auto;z-index:1}
.tl-item h3{margin-bottom:4px}
.tl-item p{color:var(--ink-2);font-size:.96rem}

/* FAQ */
.faq{display:grid;gap:14px;max-width:820px}
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:4px 22px;box-shadow:var(--shadow-sm);
}
.faq summary{
  list-style:none;cursor:pointer;font-weight:800;padding-block:18px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{width:26px;height:26px;flex:0 0 auto;position:relative}
.faq summary .pm::before,.faq summary .pm::after{
  content:"";position:absolute;inset:50% 4px auto;height:2px;background:var(--violet);
  transform:translateY(-50%);transition:transform .3s}
.faq summary .pm::after{transform:translateY(-50%) rotate(90deg)}
.faq details[open] summary .pm::after{transform:translateY(-50%) rotate(0)}
.faq details p{padding-bottom:20px;color:var(--ink-2)}

/* partner logos */
.logos{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px;align-items:center}
.logo-cell{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px;display:grid;place-items:center;box-shadow:var(--shadow-sm)}
.logo-cell svg{width:100%;height:34px;opacity:.8}

/* stories */
.stories{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.story{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm)}
.story .top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.story .ava{width:50px;height:50px;border-radius:50%;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:900;font-size:1.1rem;flex:0 0 auto}
.story .top b{display:block}
.story .top span{font-size:.85rem;color:var(--muted)}
.story blockquote{color:var(--ink-2);font-size:1rem;font-style:italic}
.story .tag{display:inline-block;margin-top:14px;font-size:.78rem;font-weight:800;
  color:var(--violet);background:rgba(124,92,255,.1);padding:.3em .8em;border-radius:999px}

/* ---------- Form ---------- */
.form-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,5vw,56px);align-items:start}
.form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(24px,4vw,40px);box-shadow:var(--shadow)}
.field{margin-bottom:20px}
.field label{display:block;font-weight:800;font-size:.92rem;margin-bottom:8px}
.field label .req{color:var(--violet)}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:1rem;color:var(--ink);
  padding:.85em 1em;border:2px solid var(--line);border-radius:12px;background:#fff;
  transition:border-color .2s,box-shadow .2s;
}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--violet);box-shadow:0 0 0 4px rgba(124,92,255,.15)}
.field .err{display:none;color:#dc2626;font-size:.85rem;font-weight:700;margin-top:6px}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#dc2626}
.field.invalid .err{display:block}
.form .btn{width:100%;justify-content:center}
.form-note{font-size:.85rem;color:var(--muted);margin-top:14px;text-align:center}

.form-success{display:none;text-align:center;padding:20px 0}
.form-success.show{display:block;animation:pop .5s var(--ease)}
.form-success .check{width:76px;height:76px;margin:0 auto 18px}
@keyframes pop{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:none}}

.info-tiles{display:grid;gap:16px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px;display:flex;gap:14px;align-items:flex-start;box-shadow:var(--shadow-sm)}
.tile .ic{width:44px;height:44px;border-radius:12px;background:var(--grad-soft);
  display:grid;place-items:center;flex:0 0 auto}
.tile b{display:block;margin-bottom:2px}
.tile p{font-size:.92rem;color:var(--ink-2)}

/* generic CTA band */
.cta-band{background:radial-gradient(900px 500px at 15% 0%,rgba(124,92,255,.30),transparent 60%),var(--dark);
  color:var(--on-dark);text-align:center}
.cta-band .lead{color:var(--on-dark-mut);max-width:560px;margin:12px auto 0}
.cta-band .btn{margin-top:26px}

/* ---------- Footer ---------- */
.footer{background:var(--dark-2);color:var(--on-dark-mut);padding-block:48px 32px}
.footer__grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
.footer h4{color:var(--on-dark);font-size:.95rem;margin-bottom:14px;letter-spacing:.02em}
.footer a{display:block;padding:5px 0;font-size:.92rem;transition:color .2s}
.footer a:hover{color:var(--teal)}
.footer .brand{color:var(--on-dark);margin-bottom:12px}
.footer p{font-size:.9rem;max-width:280px}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:.85rem}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .panel__grid{grid-template-columns:1fr;text-align:center}
  .panel__art{order:-1;max-width:460px;margin-inline:auto}
  .hero__cta,.hero__meta,.ticks{justify-content:center}
  .ticks li{justify-content:center;text-align:left}
  .form-wrap{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
}

@media (max-width:640px){
  html.snap{scroll-snap-type:none}
  .dots{display:none}
  .panel{min-height:auto;scroll-snap-align:none;padding-block:calc(var(--bar-h) + 32px) 48px}

  .nav{
    position:fixed;inset:var(--bar-h) 0 auto 0;flex-direction:column;gap:4px;
    background:var(--bg);border-bottom:1px solid var(--line);
    padding:16px var(--gutter) 24px;align-items:stretch;
    box-shadow:var(--shadow);
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(0);
    transition:opacity .28s var(--ease),visibility .28s;
  }
  .nav.open{opacity:1;visibility:visible;pointer-events:auto}
  .nav a{padding:.75em .9em;font-size:1.05rem}
  .nav .btn{margin:8px 0 0;justify-content:center}
  .burger{display:flex}
  .footer__grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.snap{scroll-snap-type:none}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .draw path,.draw circle,.draw line,.draw polyline,.draw rect{stroke-dashoffset:0}
  .floaty{display:none}
}