/* =========================================================
   MindMap Mastery — AI 인지역량 테마 스타일시트
   오늘과내일의학교
   ========================================================= */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

:root{
  --bg-0:#070b18;
  --bg-1:#0b1126;
  --bg-2:#101a3a;
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --ink:#eef2ff;
  --muted:#9aa6c4;
  --muted-2:#6b779a;
  --cyan:#22d3ee;
  --violet:#8b5cf6;
  --indigo:#6366f1;
  --amber:#f59e0b;
  --emerald:#34d399;
  --rose:#fb7185;
  --grad:linear-gradient(135deg,#22d3ee 0%,#6366f1 50%,#a855f7 100%);
  --grad-warm:linear-gradient(135deg,#f59e0b,#fb7185);
  --grad-text:linear-gradient(120deg,#67e8f9,#a78bfa 60%,#f0abfc);
  --shadow:0 20px 60px -20px rgba(0,0,0,.7);
  --r-lg:24px; --r-md:16px; --r-sm:11px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

/* ---------- 배경: 신경망 캔버스 ---------- */
#neural-bg{position:fixed;inset:0;z-index:-2;width:100%;height:100%}
.bg-aura{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
   radial-gradient(60vw 60vw at 12% 8%,rgba(34,211,238,.16),transparent 60%),
   radial-gradient(55vw 55vw at 88% 12%,rgba(168,85,247,.16),transparent 60%),
   radial-gradient(70vw 70vw at 50% 110%,rgba(99,102,241,.18),transparent 60%),
   linear-gradient(180deg,var(--bg-0),var(--bg-1) 40%,var(--bg-0));
}

/* ---------- 레이아웃 ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);
  padding:7px 14px;border:1px solid var(--line);border-radius:999px;background:var(--glass);
  backdrop-filter:blur(8px)}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.gtext{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.sec-head h2{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.18;letter-spacing:-.02em;margin:18px 0 14px}
.sec-head p{color:var(--muted);font-size:17px}

/* ---------- 헤더 ---------- */
header.nav{position:sticky;top:0;z-index:60;backdrop-filter:blur(16px);
  background:rgba(7,11,24,.6);border-bottom:1px solid var(--line-soft)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;letter-spacing:-.01em}
.brand .logo{width:34px;height:34px;border-radius:10px;background:var(--grad);position:relative;
  box-shadow:0 0 22px rgba(99,102,241,.5);display:grid;place-items:center;flex:none}
.brand .logo svg{width:20px;height:20px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:14.5px;color:var(--muted);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none}

/* ---------- 버튼 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px;
  transition:transform .18s var(--ease),box-shadow .25s,filter .2s;white-space:nowrap}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:var(--grad);color:#06101f;box-shadow:0 10px 30px -8px rgba(99,102,241,.7)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 14px 40px -8px rgba(99,102,241,.85)}
.btn-ghost{background:var(--glass);border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{background:var(--glass-strong);border-color:rgba(255,255,255,.22)}
.btn-warm{background:var(--grad-warm);color:#180a02;box-shadow:0 10px 30px -8px rgba(245,158,11,.6)}
.btn-warm:hover{filter:brightness(1.07)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}

/* ---------- HERO ---------- */
.hero{padding:78px 0 64px;text-align:center;overflow:hidden}
.hero h1{font-size:clamp(34px,6vw,68px);font-weight:900;line-height:1.06;letter-spacing:-.03em;margin:26px 0 22px}
.hero p.lead{font-size:clamp(16px,2.1vw,20px);color:var(--muted);max-width:640px;margin:0 auto 34px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:54px}
.stat{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 26px;min-width:150px;backdrop-filter:blur(10px)}
.stat .n{font-size:30px;font-weight:900;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{font-size:13px;color:var(--muted);margin-top:4px}

/* 떠다니는 노드 장식 */
.float-node{position:absolute;border-radius:50%;background:var(--grad);opacity:.5;
  filter:blur(.3px);box-shadow:0 0 24px rgba(99,102,241,.6);animation:floaty 7s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-22px)}}

/* ---------- 단계 개요 카드 ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step-card{position:relative;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:30px 26px;backdrop-filter:blur(10px);
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;overflow:hidden}
.step-card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step-card:hover::before{opacity:1}
.step-num{font-size:13px;font-weight:800;letter-spacing:.15em;color:var(--cyan)}
.step-card h3{font-size:23px;font-weight:800;margin:12px 0 8px;letter-spacing:-.01em}
.step-card .sub{color:var(--muted);font-size:14.5px;margin-bottom:18px}
.step-card ul{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:22px}
.step-card li{display:flex;gap:9px;font-size:14.5px;color:#c7cfe6}
.step-card li svg{flex:none;margin-top:3px;color:var(--emerald)}
.price-tag{display:inline-flex;align-items:baseline;gap:6px;margin-bottom:6px}
.price-tag .amt{font-size:26px;font-weight:900}
.price-tag .per{font-size:13px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;
  padding:5px 11px;border-radius:999px;margin-bottom:14px}
.badge.free{background:rgba(52,211,153,.14);color:var(--emerald);border:1px solid rgba(52,211,153,.3)}
.badge.hybrid{background:rgba(34,211,238,.13);color:var(--cyan);border:1px solid rgba(34,211,238,.3)}
.badge.pro{background:rgba(245,158,11,.14);color:var(--amber);border:1px solid rgba(245,158,11,.32)}
.icon-orb{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--glass-strong);border:1px solid var(--line)}
.icon-orb svg{width:26px;height:26px}

/* ---------- 학습 본문(아코디언 강의) ---------- */
.curriculum{padding:84px 0}
.stage-block{margin-bottom:34px}
.stage-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 24px;border-radius:var(--r-md);border:1px solid var(--line);
  background:linear-gradient(120deg,var(--glass-strong),var(--glass));backdrop-filter:blur(10px);margin-bottom:18px}
.stage-bar .left{display:flex;align-items:center;gap:16px}
.stage-bar .st-icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;flex:none;
  background:var(--grad);box-shadow:0 0 22px rgba(99,102,241,.45)}
.stage-bar h3{font-size:21px;font-weight:800;letter-spacing:-.01em}
.stage-bar .meta{font-size:13px;color:var(--muted)}
.progress-mini{height:6px;width:160px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden}
.progress-mini > i{display:block;height:100%;background:var(--grad);width:0;transition:width .6s var(--ease)}

.lesson{border:1px solid var(--line-soft);border-radius:var(--r-md);margin-bottom:12px;
  background:var(--glass);overflow:hidden;transition:border-color .25s}
.lesson.open{border-color:rgba(139,92,246,.4)}
.lesson-head{display:flex;align-items:center;gap:14px;padding:17px 20px;cursor:pointer;user-select:none}
.lesson-head .li-num{width:30px;height:30px;border-radius:9px;background:var(--glass-strong);
  display:grid;place-items:center;font-size:13px;font-weight:800;color:var(--cyan);flex:none;border:1px solid var(--line)}
.lesson-head .li-title{flex:1;font-weight:700;font-size:16px}
.lesson-head .li-title small{display:block;font-weight:500;font-size:12.5px;color:var(--muted-2);margin-top:2px}
.lesson-head .li-state{font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;flex:none}
.li-state.free{background:rgba(52,211,153,.13);color:var(--emerald)}
.li-state.lock{background:rgba(251,113,133,.12);color:var(--rose)}
.li-state.done{background:rgba(99,102,241,.18);color:#a5b4fc}
.chev{transition:transform .3s;color:var(--muted);flex:none}
.lesson.open .chev{transform:rotate(180deg)}
.lesson-body{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.lesson-body-in{padding:4px 22px 24px 64px}
.lesson-body h4{font-size:16.5px;margin:18px 0 8px;color:#dfe5fb}
.lesson-body p{color:#c2cae3;font-size:15px;margin-bottom:12px}
.lesson-body ul,.lesson-body ol{margin:0 0 14px 20px;color:#c2cae3;font-size:15px}
.lesson-body li{margin-bottom:7px}
.lesson-body strong{color:var(--ink)}
.callout{border-left:3px solid var(--cyan);background:rgba(34,211,238,.07);
  padding:13px 16px;border-radius:0 10px 10px 0;margin:14px 0;font-size:14.5px;color:#cfe9f2}
.callout.warm{border-color:var(--amber);background:rgba(245,158,11,.08);color:#f3dcb4}
.figure{margin:16px 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.figure img{width:100%}
.figure figcaption{font-size:12.5px;color:var(--muted);padding:9px 14px;background:var(--bg-1);text-align:center}
.video-embed{position:relative;padding-bottom:56.25%;height:0;border-radius:14px;overflow:hidden;margin:16px 0;border:1px solid var(--line)}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%}
.worksheet{background:var(--glass-strong);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:16px 0}
.worksheet h5{font-size:14px;color:var(--amber);font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.worksheet textarea{width:100%;min-height:90px;background:rgba(0,0,0,.25);border:1px solid var(--line);
  border-radius:10px;color:var(--ink);padding:11px 13px;font-family:inherit;font-size:14px;resize:vertical}
.lesson-done-row{display:flex;justify-content:flex-end;margin-top:16px}

/* 잠긴 강의 오버레이 */
.lock-veil{position:relative}
.lock-veil .lesson-body-in{filter:blur(0)}
.locked-content{text-align:center;padding:30px 22px}
.locked-content .lk-ico{width:56px;height:56px;border-radius:16px;margin:0 auto 14px;display:grid;place-items:center;
  background:var(--grad-warm);box-shadow:0 0 26px rgba(245,158,11,.4)}
.locked-content h4{font-size:18px;margin-bottom:6px}
.locked-content p{font-size:14px;color:var(--muted);margin-bottom:18px}

/* ---------- 갤러리 ---------- */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.gal-item{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:#fff;
  transition:transform .3s var(--ease),box-shadow .3s}
.gal-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.gal-item img{width:100%;height:230px;object-fit:cover;object-position:top}
.gal-item .cap{padding:13px 16px;background:var(--bg-1)}
.gal-item .cap b{font-size:15px}
.gal-item .cap span{display:block;font-size:13px;color:var(--muted);margin-top:3px}

/* ---------- 가격 ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price-card{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 26px;display:flex;flex-direction:column;backdrop-filter:blur(10px);position:relative}
.price-card.feature{border-color:rgba(139,92,246,.5);box-shadow:0 0 40px -10px rgba(139,92,246,.4)}
.price-card.feature .ribbon{position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--grad);color:#06101f;font-size:12px;font-weight:800;padding:5px 14px;border-radius:999px}
.price-card h3{font-size:20px;font-weight:800;margin-bottom:6px}
.price-card .pdesc{font-size:13.5px;color:var(--muted);margin-bottom:18px;min-height:40px}
.price-card .big{font-size:38px;font-weight:900;letter-spacing:-.02em}
.price-card .big small{font-size:15px;color:var(--muted);font-weight:600}
.price-card ul{list-style:none;margin:20px 0 26px;display:flex;flex-direction:column;gap:11px}
.price-card li{display:flex;gap:10px;font-size:14.5px;color:#c7cfe6}
.price-card li svg{flex:none;margin-top:3px;color:var(--emerald)}
.price-card .btn{margin-top:auto}

/* ---------- 모달 ---------- */
.modal-bg{position:fixed;inset:0;z-index:100;background:rgba(4,7,16,.72);backdrop-filter:blur(8px);
  display:none;align-items:center;justify-content:center;padding:20px;opacity:0;transition:opacity .25s}
.modal-bg.show{display:flex;opacity:1}
.modal{width:100%;max-width:440px;background:linear-gradient(160deg,#101936,#0b1226);
  border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;box-shadow:var(--shadow);
  transform:translateY(14px) scale(.98);transition:transform .3s var(--ease)}
.modal-bg.show .modal{transform:none}
.modal .mclose{position:absolute;top:18px;right:20px}
.modal h3{font-size:22px;font-weight:800;margin-bottom:6px}
.modal p.msub{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.modal .order{background:var(--glass);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:18px}
.modal .order .row{display:flex;justify-content:space-between;font-size:14.5px;margin-bottom:8px}
.modal .order .row.total{border-top:1px solid var(--line);padding-top:11px;margin-top:11px;font-weight:800;font-size:17px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input{width:100%;background:rgba(0,0,0,.28);border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;color:var(--ink);font-family:inherit;font-size:15px}
.field input:focus{outline:none;border-color:var(--violet)}
.pay-methods{display:flex;gap:10px;margin-bottom:18px}
.pay-methods button{flex:1;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--glass);
  font-size:13.5px;font-weight:600;transition:.2s}
.pay-methods button.active{border-color:var(--violet);background:rgba(139,92,246,.15);color:#c4b5fd}
.demo-note{font-size:12px;color:var(--muted-2);text-align:center;margin-top:14px}
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);z-index:200;
  background:linear-gradient(120deg,#101936,#0b1226);border:1px solid var(--line);
  padding:14px 22px;border-radius:14px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;
  font-size:14.5px;font-weight:600;opacity:0;transition:.35s var(--ease);pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast .tdot{width:30px;height:30px;border-radius:9px;background:var(--grad);display:grid;place-items:center;flex:none}

/* ---------- 인터랙티브 데모 ---------- */
.demo-area{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;backdrop-filter:blur(10px)}
#demo-canvas{width:100%;height:420px;border-radius:14px;background:radial-gradient(circle at 50% 45%,#0e1838,#080d1d);
  border:1px solid var(--line);display:block;cursor:crosshair}
.demo-tools{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px;align-items:center}
.demo-tools input{flex:1;min-width:180px;background:rgba(0,0,0,.28);border:1px solid var(--line);
  border-radius:10px;padding:11px 13px;color:var(--ink);font-family:inherit}
.swatches{display:flex;gap:8px}
.swatch{width:26px;height:26px;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:.2s}
.swatch.active{border-color:#fff;transform:scale(1.12)}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--line-soft);padding:6px 0}
.faq-q{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:18px 4px;cursor:pointer;font-weight:700;font-size:16px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease);color:var(--muted);font-size:14.5px}
.faq-item.open .faq-a{padding-bottom:16px}
.faq-q .chev{transition:transform .3s}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}

/* ---------- CTA 밴드 ---------- */
.cta-band{margin:30px auto;border-radius:var(--r-lg);padding:52px 30px;text-align:center;
  background:linear-gradient(135deg,rgba(34,211,238,.14),rgba(168,85,247,.18));
  border:1px solid var(--line);position:relative;overflow:hidden}
.cta-band h2{font-size:clamp(26px,3.6vw,40px);font-weight:900;margin-bottom:14px;letter-spacing:-.02em}
.cta-band p{color:var(--muted);max-width:540px;margin:0 auto 26px;font-size:16px}

/* ---------- 푸터 ---------- */
footer{border-top:1px solid var(--line-soft);margin-top:40px;padding:46px 0 60px}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
footer .brand{margin-bottom:12px}
footer p{color:var(--muted);font-size:14px;max-width:300px}
.foot-col h5{font-size:13px;color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;margin-bottom:14px}
.foot-col a{display:block;color:var(--muted);font-size:14.5px;margin-bottom:9px;transition:color .2s}
.foot-col a:hover{color:var(--ink)}
.foot-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted-2);font-size:13px}

/* ---------- 진행바(상단) ---------- */
#scrollbar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--grad);z-index:80;box-shadow:0 0 12px rgba(99,102,241,.7)}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* 섹션 패딩 */
.pad{padding:84px 0}

/* ---------- 반응형 ---------- */
@media(max-width:920px){
  .steps-grid,.pricing-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;
    background:rgba(8,12,26,.97);padding:18px 22px;border-bottom:1px solid var(--line);gap:16px;backdrop-filter:blur(16px)}
  .nav-toggle{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--glass)}
  .gallery{grid-template-columns:1fr}
}
@media(max-width:620px){
  .wrap{padding:0 16px}
  .pad{padding:60px 0}
  .hero{padding:54px 0 40px}
  .hero-stats{gap:10px}
  .stat{min-width:calc(50% - 10px);padding:16px}
  .lesson-body-in{padding:4px 16px 20px 18px}
  .modal{padding:24px 20px}
  .nav-cta .btn-ghost{display:none}
  .stage-bar .progress-mini{display:none}
}