:root{
  --blue:#2563eb; --blue2:#4f46e5; --purple:#7c3aed; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --soft:#f8fbff; --gold:#f59e0b;
}
*{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}
a{text-decoration:none;color:inherit}
.container{width:min(1200px,calc(100% - 40px));margin:auto}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,232,240,.9);box-shadow:0 8px 26px rgba(15,23,42,.05)}
.nav-wrap{height:96px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:16px}
.brand img{width:62px;height:62px;border-radius:50%;border:4px solid rgba(255,255,255,.9);box-shadow:0 10px 30px rgba(37,99,235,.18);object-fit:contain;background:transparent}
.brand span{display:flex;flex-direction:column;line-height:1.06}
.brand strong{font-size:31px;font-weight:950;letter-spacing:-.05em}
.brand small{font-size:12px;color:var(--purple);margin-top:6px;font-weight:900;letter-spacing:.18em}
.nav{display:flex;align-items:center;gap:32px}
.nav a{font-weight:800;font-size:17px;color:#334155;position:relative}
.nav a:after{content:"";position:absolute;left:0;bottom:-9px;width:0;height:3px;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--purple));transition:.22s}
.nav a:hover{color:var(--blue)}
.nav a:hover:after{width:100%}
.menu-btn{display:none;border:0;background:none;font-size:31px;color:#0f172a}

.hero{position:relative;overflow:hidden;padding:100px 0 95px;background:
radial-gradient(circle at 85% 12%, rgba(191,219,254,.95) 0, rgba(219,234,254,.45) 20%, transparent 39%),
radial-gradient(circle at 78% 78%, rgba(233,213,255,.82) 0, rgba(243,232,255,.35) 18%, transparent 35%),
linear-gradient(135deg,#fcfdff 0%,#f3f7ff 44%,#ffffff 100%)}
.hero:before{content:"";position:absolute;left:-120px;bottom:-90px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle, rgba(59,130,246,.16), transparent 70%)}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:54px;align-items:center}
.eyebrow{display:inline-block;color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.15em;text-transform:uppercase;margin-bottom:12px}
.hero-badge{display:inline-flex;align-items:center;padding:9px 14px;border-radius:999px;background:rgba(255,255,255,.82);border:1px solid rgba(148,163,184,.18);box-shadow:0 12px 26px rgba(37,99,235,.09);font-size:14px;font-weight:900;color:#4338ca;margin-bottom:18px}
.hero h1{font-size:clamp(48px,6vw,80px);line-height:1.02;letter-spacing:-.07em;margin:0 0 24px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--blue),var(--purple));background-clip:text;-webkit-background-clip:text;color:transparent}
.hero-copy>p{font-size:20px;color:#475569;margin:0 0 30px;max-width:650px}.hero-copy>p strong{color:#0f172a}
.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;font-weight:900;border:1px solid transparent;transition:.2s;letter-spacing:-.02em}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;box-shadow:0 16px 34px rgba(37,99,235,.23)}
.btn.secondary{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:0 10px 22px rgba(15,23,42,.06)}
.btn.youtube{background:#ef4444;color:#fff}
.btn.disabled{opacity:.55;pointer-events:none}
.hero-points{display:flex;flex-wrap:wrap;gap:16px;row-gap:10px;margin-top:24px;color:#475569;font-size:14px;font-weight:800}
.hero-stats{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-stats div{min-width:140px;padding:16px 18px;border-radius:20px;background:rgba(255,255,255,.8);border:1px solid rgba(226,232,240,.95);box-shadow:0 14px 32px rgba(15,23,42,.05)}
.hero-stats b{display:block;font-size:24px;line-height:1.08}.hero-stats small{display:block;color:var(--muted);margin-top:6px;font-size:13px;font-weight:700}

.hero-visual{position:relative;height:560px;display:flex;align-items:center;justify-content:center}
.profile-glow{position:absolute;inset:auto; width:410px; height:410px; border-radius:50%; background:radial-gradient(circle, rgba(125,211,252,.5), rgba(147,197,253,.15) 45%, transparent 72%); filter:blur(4px)}
.main-profile{position:relative;width:440px;padding:0;border-radius:50%;background:transparent;border:0;box-shadow:none}
.main-profile img{width:100%;height:auto;border-radius:50%;object-fit:contain;box-shadow:0 30px 70px rgba(15,23,42,.22);filter:none}
.profile-caption{margin-top:20px;padding:14px 18px;text-align:center;border-radius:20px;background:rgba(255,255,255,.86);border:1px solid rgba(226,232,240,.95);box-shadow:0 12px 28px rgba(15,23,42,.08)}.profile-caption b{display:block;font-size:25px;letter-spacing:-.04em}.profile-caption small{display:block;margin-top:5px;color:#475569;font-weight:700;font-size:14px}
.floating-chip{position:absolute;padding:12px 18px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 40px rgba(15,23,42,.12);font-size:15px;font-weight:900;color:#334155}
.chip1{left:4%;top:18%;color:#2563eb}.chip2{right:3%;top:14%;color:#7c3aed}.chip3{left:3%;bottom:18%;color:#ea580c}.chip4{right:10%;bottom:12%;color:#0f766e}

.quick{margin-top:-28px;position:relative;z-index:3}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;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,.9);backdrop-filter:blur(10px)}
.quick-grid>a{display:flex;align-items:center;gap:16px;padding:24px 24px;border-right:1px solid var(--line);transition:.2s}
.quick-grid>a:last-child{border-right:0}
.quick-grid>a:hover{background:#f8fbff}
.quick-grid b{font-size:28px;display:grid;place-items:center;min-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:13px;color:var(--muted);font-weight:700;margin-top:3px;line-height:1.45}

.section{padding:92px 0}.soft{background:linear-gradient(180deg,#fff,#fbfdff)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:30px}.section-head h2{margin:6px 0 0;font-size:44px;letter-spacing:-.05em}.section-head p{margin:0;max-width:520px;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,.extra-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:0 12px 30px rgba(15,23,42,.05)}
.app-card{position:relative;overflow:hidden}.app-card:before{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle, rgba(191,219,254,.42), transparent 70%)}
.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:800}.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:900;font-size:13px}
.app-actions{margin-top:16px}.three-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.three-actions a:nth-child(3){grid-column:1 / -1}
.app-actions a{display:flex;align-items:center;justify-content:center;text-align:center;min-height:48px;padding:10px 12px;border-radius:14px;font-weight:900;font-size:14px}
.app-actions .play{background:linear-gradient(135deg,#2563eb,#4f46e5);color:#fff;box-shadow:0 10px 22px rgba(37,99,235,.18)}
.app-actions .desktop{background:#f5f3ff;color:#5b21b6;border:1px solid #ddd6fe}
.app-actions .web{background:#ecfeff;color:#0f766e;border:1px solid #a5f3fc}
.app-actions .disabled{opacity:.5;pointer-events:none}

.instrument-grid{grid-template-columns:repeat(5,1fr)}
.instrument-card,.extra-card,.daily-grid article{border-radius:24px}.instrument-card span,.extra-card span,.daily-grid article span{font-size:38px}.instrument-card h3,.extra-card h3,.daily-grid article h3{font-size:25px;margin:8px 0}.instrument-card p,.extra-card p,.daily-grid article p{margin:0;color:#475569}

.split{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}.content-copy h2{font-size:48px;line-height:1.12;letter-spacing:-.05em;margin:4px 0 16px}.content-copy p{font-size:18px;color:#475569}.content-copy ul{padding-left:18px;color:#334155}.content-copy li{margin:9px 0;font-weight:700}
.extra-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.extra-card{min-height:170px}

.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:220px;display:flex;flex-direction:column;justify-content:end;background:linear-gradient(135deg,#0f172a,#334155);color:#fff}.video-card span{font-size:40px}.video-card b{display:block;font-size:24px;margin-top:12px}.video-card small{opacity:.85;margin-top:6px}

footer{padding:44px 0 28px;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:56px;height:56px;border-radius:50%;object-fit:cover}.footer-brand b{display:block;font-size:26px;letter-spacing:-.04em}.footer-brand p{margin:6px 0 0;color:#cbd5e1}.footer-grid a{display:block;color:#cbd5e1;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:1150px){
  .hero-grid,.split{grid-template-columns:1fr}
  .hero-visual{height:500px}
  .instrument-grid{grid-template-columns:repeat(3,1fr)}
  .app-grid,.daily-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  .nav{display:none;position:absolute;top:96px;left:0;right:0;background:#fff;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% - 24px,1200px)}
  .nav-wrap{height:86px}
  .brand img{width:54px;height:54px}
  .brand strong{font-size:23px}
  .brand small{font-size:10px}
  .hero{padding:60px 0 72px}
  .hero h1{font-size:clamp(39px,11vw,56px)}
  .hero-copy>p{font-size:17px}
  .hero-visual{height:auto;padding-top:10px}
  .main-profile{width:min(100%,390px)}
  .profile-caption b{font-size:22px}
  .floating-chip{font-size:13px;padding:10px 14px}
  .chip1{left:0;top:8%}.chip2{right:0;top:4%}.chip3{left:0;bottom:7%}.chip4{right:3%;bottom:3%}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr}
  .section{padding:74px 0}
  .section-head{flex-direction:column;align-items:flex-start}
  .section-head h2,.content-copy h2{font-size:35px}
  .app-grid,.daily-grid,.extra-grid,.video-wall,.instrument-grid{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{grid-template-columns:1fr}
  .three-actions a:nth-child(3){grid-column:auto}
}