:root{
  --blue:#2563eb;--blue2:#4f46e5;--purple:#7c3aed;--ink:#0f172a;--muted:#64748b;
  --line:#e2e8f0;--soft:#f8fafc;--soft2:#eef4ff;--green:#16a34a;--radius:26px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Pretendard,"Noto Sans KR","Malgun Gothic",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:auto}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid rgba(226,232,240,.85);box-shadow:0 8px 24px rgba(15,23,42,.04)}
.nav-wrap{height:92px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:15px;color:inherit;text-decoration:none}
.brand img{width:52px;height:52px;border-radius:16px;box-shadow:0 8px 18px rgba(79,70,229,.18)}
.brand span{display:flex;flex-direction:column;line-height:1.08}
.brand strong{font-size:28px;font-weight:900;letter-spacing:-.04em}
.brand small{font-size:13px;color:var(--purple);margin-top:7px;font-weight:800;letter-spacing:.12em}
.nav{display:flex;align-items:center;gap:34px}
.nav a{color:#334155;text-decoration:none;font-weight:800;font-size:17px;position:relative}
.nav a:after{content:"";position:absolute;left:0;bottom:-8px;width:0;height:3px;border-radius:20px;background:linear-gradient(90deg,var(--blue),var(--purple));transition:.2s}
.nav a:hover{color:var(--blue)}
.nav a:hover:after{width:100%}
.menu-btn{display:none;border:0;background:none;font-size:30px;color:var(--ink)}

.hero{position:relative;overflow:hidden;padding:95px 0 92px;background:
radial-gradient(circle at 80% 16%, rgba(191,219,254,.95) 0, rgba(219,234,254,.45) 18%, transparent 38%),
radial-gradient(circle at 64% 84%, rgba(233,213,255,.85) 0, rgba(243,232,255,.35) 16%, transparent 34%),
linear-gradient(135deg,#fbfdff 0%,#f5f9ff 36%,#ffffff 100%)}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px)}
.hero:before{width:440px;height:440px;right:-180px;top:-170px;border:1px solid rgba(99,102,241,.11)}
.hero:after{width:190px;height:190px;left:-90px;bottom:20px;background:radial-gradient(circle, rgba(191,219,254,.45), transparent 65%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:68px}
.eyebrow{display:inline-block;color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:999px;background:rgba(255,255,255,.86);border:1px solid rgba(148,163,184,.18);box-shadow:0 10px 30px rgba(37,99,235,.08);font-size:14px;font-weight:800;color:#4f46e5;margin-bottom:18px}
.hero h1{font-size:clamp(48px,6vw,82px);line-height:1.02;letter-spacing:-.065em;margin:0 0 24px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-copy>p{font-size:21px;color:#475569;max-width:650px;margin:0 0 34px}
.hero-copy>p strong{color:#1e293b}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:0 24px;border-radius:16px;text-decoration:none;font-weight:900;border:1px solid transparent;transition:.22s;letter-spacing:-.02em}
.btn.primary{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;box-shadow:0 14px 30px rgba(37,99,235,.24)}
.btn.secondary{background:rgba(255,255,255,.88);color:var(--ink);border-color:var(--line);box-shadow:0 8px 24px rgba(15,23,42,.05)}
.btn.youtube{background:#ef4444;color:#fff}
.btn:hover{transform:translateY(-2px)}
.btn.disabled{opacity:.55;pointer-events:none}
.hero-points{display:flex;gap:18px;row-gap:10px;flex-wrap:wrap;margin-top:24px;color:#475569;font-size:14px;font-weight:700}
.hero-stats{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-stats div{min-width:125px;padding:16px 18px;border-radius:20px;background:rgba(255,255,255,.78);border:1px solid rgba(226,232,240,.95);box-shadow:0 12px 30px rgba(15,23,42,.05)}
.hero-stats b{display:block;font-size:24px;line-height:1.1}
.hero-stats small{display:block;color:var(--muted);margin-top:5px;font-size:13px;font-weight:700}

.hero-card{height:520px;position:relative;display:flex;align-items:center;justify-content:center}
.phone{position:relative;width:312px;min-height:470px;padding:44px 28px 28px;border:10px solid #0f172a;border-radius:46px;background:linear-gradient(180deg,#fff,#f8fafc);box-shadow:0 38px 80px rgba(15,23,42,.24);transform:rotate(6deg)}
.phone:before{content:"";position:absolute;inset:auto 14px 14px 14px;height:24%;background:linear-gradient(180deg,transparent,rgba(79,70,229,.03));border-radius:0 0 34px 34px;pointer-events:none}
.phone-bar{position:absolute;top:11px;left:50%;transform:translateX(-50%);width:96px;height:20px;background:#111827;border-radius:20px}
.phone img{width:76px}
.phone h3{font-size:29px;margin:24px 0 8px;letter-spacing:-.04em}
.phone p{color:var(--muted);font-size:17px}
.mini-buttons{display:grid;gap:11px;margin-top:25px}
.mini-buttons span{padding:13px 16px;border-radius:14px;background:#eef2ff;color:#4338ca;font-weight:900}
.orbit{position:absolute;width:74px;height:74px;border-radius:24px;display:grid;place-items:center;background:white;font-weight:900;font-size:28px;box-shadow:0 18px 42px rgba(37,99,235,.16)}
.o1{left:4%;top:18%;color:#ef4444;transform:rotate(-12deg)}
.o2{right:3%;top:9%;color:#2563eb;transform:rotate(12deg)}
.o3{right:4%;bottom:10%;color:#7c3aed;transform:rotate(-8deg)}

.quick{margin-top:-34px;position:relative;z-index:3}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);background:white;border:1px solid var(--line);border-radius:28px;overflow:hidden;box-shadow:0 18px 44px rgba(15,23,42,.08)}
.quick-grid.glass{background:rgba(255,255,255,.88);backdrop-filter:blur(10px)}
.quick-grid>a{display:flex;align-items:center;gap:16px;padding:24px 26px;text-decoration:none;color:inherit;border-right:1px solid var(--line);transition:.2s}
.quick-grid>a:last-child{border-right:0}
.quick-grid>a:hover{background:#f8fbff;transform:translateY(-1px)}
.quick-grid b{font-size:28px;display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,#eef2ff,#dbeafe)}
.quick-grid span{display:flex;flex-direction:column;font-size:25px;font-weight:900;letter-spacing:-.03em}
.quick-grid small{font-size:14px;color:var(--muted);font-weight:700;margin-top:3px}

.section{padding:92px 0}
.soft{background:linear-gradient(180deg,#fff,#fbfdff)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}
.section-head h2{margin:6px 0 0;font-size:42px;letter-spacing:-.04em}
.section-head p{margin:0;max-width:450px;color:var(--muted)}
.app-grid,.instrument-grid,.daily-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.app-card,.instrument-card,.daily-grid article{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 12px 30px rgba(15,23,42,.05)}
.app-top{display:flex;gap:14px;align-items:center;margin-bottom:12px}.app-top img{width:64px;height:64px;border-radius:16px;object-fit:cover}.app-top h3{margin:0 0 2px;font-size:24px;letter-spacing:-.03em}.app-top small{color:var(--muted);font-weight:700}.app-card>p{color:#475569;margin:12px 0 18px;min-height:55px}.status{display:inline-block;padding:7px 12px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-weight:800;font-size:13px}.app-actions{display:flex;gap:10px;margin-top:16px}.app-actions a{flex:1;text-align:center;padding:12px 14px;border-radius:14px;text-decoration:none;font-weight:800}.app-actions .web{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff}.app-actions .play{background:#f8fafc;color:#111827;border:1px solid var(--line)}.app-actions .disabled{opacity:.55;pointer-events:none}
.split{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center}.mock-learning{padding:28px;border-radius:28px;background:linear-gradient(180deg,#eff6ff,#fff);border:1px solid #dbeafe;box-shadow:0 24px 50px rgba(37,99,235,.08)}.mock-top{display:flex;justify-content:space-between;color:#475569;font-weight:800;margin-bottom:20px}.word-card{background:#fff;border-radius:26px;padding:32px;border:1px solid var(--line);text-align:center;box-shadow:0 12px 30px rgba(15,23,42,.05)}.word-card small{color:var(--muted)}.word-card h3{font-size:48px;margin:10px 0 0;letter-spacing:-.05em}.word-card p{font-size:20px;color:#475569;margin:8px 0 24px}.sound-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.sound-row button,.mock-nav button{border:0;background:#eff6ff;color:#1d4ed8;padding:12px 16px;border-radius:14px;font-weight:800}.mock-nav{display:flex;gap:10px;justify-content:center;margin-top:20px}.content-copy h2{font-size:46px;line-height:1.12;letter-spacing:-.05em;margin:5px 0 16px}.content-copy p{font-size:18px;color:#475569}.content-copy ul{padding-left:18px;color:#334155}.content-copy li{margin:8px 0}
.instrument-card span,.daily-grid article span{font-size:38px}.instrument-card h3,.daily-grid article h3{font-size:26px;margin:8px 0}.instrument-card p,.daily-grid article p{margin:0;color:#475569}
.video-section{background:linear-gradient(180deg,#fff,#f8fbff)}.video-split{align-items:stretch}.video-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.video-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 12px 30px rgba(15,23,42,.05)}.video-card.big{grid-column:span 2;min-height:230px;display:flex;flex-direction:column;justify-content:end;background:linear-gradient(135deg,#111827,#334155);color:#fff}.video-card span{font-size:40px}.video-card b{display:block;font-size:24px;margin-top:12px}.video-card small{opacity:.82;margin-top:6px}
footer{padding:42px 0 26px;background:#0f172a;color:#e2e8f0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:20px;align-items:start}.footer-brand{display:flex;gap:14px;align-items:flex-start}.footer-brand img{width:48px;height:48px}.footer-brand b{display:block;font-size:24px;letter-spacing:-.03em}.footer-brand p{margin:6px 0 0;color:#cbd5e1}.footer-grid a{display:block;color:#cbd5e1;text-decoration:none;margin-top:8px}.copyright{margin-top:24px;padding-top:18px;border-top:1px solid rgba(255,255,255,.08);color:#94a3b8;font-size:14px}

@media(max-width:1100px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-card{order:-1;height:480px}
  .app-grid,.instrument-grid,.daily-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
}
@media(max-width:900px){
  .nav{display:none;position:absolute;top:92px;left:0;right:0;background:white;padding:18px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:14px}
  .nav.open{display:flex}
  .menu-btn{display:block}
  .quick-grid{grid-template-columns:1fr 1fr}
  .quick-grid>a:nth-child(2){border-right:0}
  .quick-grid>a:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .container{width:min(100% - 26px,1180px)}
  .nav-wrap{height:84px}
  .brand strong{font-size:20px}
  .brand small{font-size:11px}
  .hero{padding:54px 0 70px}
  .hero h1{font-size:clamp(38px,11vw,56px)}
  .hero-copy>p{font-size:17px}
  .hero-card{height:420px}
  .phone{width:250px;min-height:395px;padding:40px 22px 22px;border-width:8px}
  .phone h3{font-size:24px}
  .phone p{font-size:15px}
  .orbit{width:58px;height:58px;font-size:22px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .section{padding:72px 0}
  .section-head{flex-direction:column;align-items:flex-start}
  .section-head h2,.content-copy h2{font-size:34px}
  .app-grid,.instrument-grid,.daily-grid,.video-wall{grid-template-columns:1fr}
  .video-card.big{grid-column:span 1;min-height:190px}
  .quick-grid{grid-template-columns:1fr}
  .quick-grid>a{border-right:0!important;border-bottom:1px solid var(--line)}
  .quick-grid>a:last-child{border-bottom:0}
}


.three-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.three-actions a:nth-child(3){grid-column:1 / -1}.app-actions .desktop{background:#f5f3ff;color:#5b21b6;border:1px solid #ddd6fe}@media(max-width:640px){.three-actions{grid-template-columns:1fr}.three-actions a:nth-child(3){grid-column:auto}}