:root{
  --blue:#1733B7; --blue-deep:#0E2188; --blue-tint:#F0F3FE;
  --ink:#101218; --gray-1:#3D4250; --gray-2:#878D9C; --gray-3:#C9CDD6;
  --surface:#F6F7FA; --line:#E8EAEF; --red:#C0394B; --green:#1F8A5C; --yellow:#FFE34D;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:'Pretendard',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo',sans-serif;background:var(--surface);color:var(--ink);font-size:15px;line-height:1.7;letter-spacing:-0.01em;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
button,input,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}

/* 상단바 */
.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{white-space:nowrap;font-size:19px;font-weight:900;letter-spacing:-0.04em;display:flex;align-items:baseline;gap:8px}
.logo em{font-style:normal;color:var(--blue)}
.logo-en{font-size:11.5px;font-weight:700;color:var(--gray-2);letter-spacing:.06em}
.topnav{display:flex;gap:16px;font-size:13px;font-weight:700;color:var(--gray-2);white-space:nowrap}
@media(max-width:480px){.logo-en{display:none}.topnav{gap:10px;font-size:12px}}
.topnav a:hover,.topnav a.on{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:12px;padding:14px 22px;font-weight:800;font-size:15px;transition:.15s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-deep)}
.btn-primary:disabled{background:var(--gray-3);cursor:not-allowed}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--gray-1)}
.btn-ghost:hover{border-color:var(--gray-2)}
.btn-block{width:100%}
.btn-kakao{background:var(--yellow);color:#3A1D1D}

/* 히어로 */
.hero{padding:56px 0 36px;text-align:center}
.hero h1{font-size:30px;font-weight:900;letter-spacing:-0.04em;line-height:1.3}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero p{margin-top:12px;color:var(--gray-1)}
.cohort-pill{display:inline-block;background:var(--blue-tint);color:var(--blue);font-weight:800;font-size:13px;padding:5px 12px;border-radius:999px;margin-bottom:14px}

/* 카드 */
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}
.card+.card{margin-top:14px}
.section{padding:28px 0}
.section h2{font-size:20px;font-weight:900;letter-spacing:-0.03em;margin-bottom:14px}
.section h2 small{font-size:13px;color:var(--gray-2);font-weight:600;margin-left:8px}

/* 반 카드 그리드 */
.class-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.class-grid{grid-template-columns:1fr}}
.class-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:8px}
.class-card h3{font-size:18px;font-weight:900;letter-spacing:-0.03em}
.class-card .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--blue);background:var(--blue-tint);padding:2px 9px;border-radius:999px;margin-right:4px}
.class-card .desc{color:var(--gray-1);font-size:14px}
.class-card .meta{font-size:13px;color:var(--gray-2)}
.price-row{display:flex;justify-content:space-between;align-items:baseline;border-top:1px dashed var(--line);padding-top:8px;margin-top:4px;font-size:14px}
.price-row b{font-size:17px;letter-spacing:-0.02em}
.price-row .lbl{color:var(--gray-2);font-weight:600}

/* 폼 */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:800;color:var(--gray-1);margin-bottom:6px}
.field input{width:100%;height:48px;border:1.5px solid var(--line);border-radius:12px;padding:0 14px;background:#fff;transition:.15s}
.field input:focus{outline:none;border-color:var(--blue)}
.field .hint{font-size:12.5px;color:var(--gray-2);margin-top:5px}
.field .err{font-size:12.5px;color:var(--red);margin-top:5px;display:none}
.field.invalid input{border-color:var(--red)}
.field.invalid .err{display:block}

.radio-list{display:grid;gap:10px}
.radio-item{position:relative}
.radio-item input{position:absolute;opacity:0;pointer-events:none}
.radio-item label{display:flex;align-items:center;gap:12px;border:1.5px solid var(--line);border-radius:14px;padding:14px 16px;background:#fff;cursor:pointer;transition:.15s}
.radio-item label:hover{border-color:var(--gray-3)}
.radio-item input:checked+label{border-color:var(--blue);background:var(--blue-tint);box-shadow:0 0 0 2px rgba(23,51,183,.12)}
.radio-item input:disabled+label{opacity:.5;cursor:not-allowed}
.radio-dot{width:20px;height:20px;border-radius:50%;border:2px solid var(--gray-3);flex:none;position:relative}
.radio-item input:checked+label .radio-dot{border-color:var(--blue)}
.radio-item input:checked+label .radio-dot::after{content:'';position:absolute;inset:4px;border-radius:50%;background:var(--blue)}
.radio-body{flex:1;min-width:0}
.radio-body b{display:block;font-size:15.5px;letter-spacing:-0.02em}
.radio-body span{display:block;font-size:12.5px;color:var(--gray-2)}
.radio-price{font-weight:900;font-size:16px;white-space:nowrap}
.tier-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:480px){.tier-grid{grid-template-columns:1fr}}
.tier-grid .radio-item label{flex-direction:column;align-items:flex-start;gap:6px}
.tier-grid .radio-body span{white-space:normal}
.sold{display:inline-block;font-size:11.5px;font-weight:800;color:var(--red);background:#FDEEF0;padding:1px 8px;border-radius:999px;margin-left:6px}
.left{display:inline-block;font-size:11.5px;font-weight:800;color:var(--green);background:#EAF6F0;padding:1px 8px;border-radius:999px;margin-left:6px}

.summary{background:var(--blue-tint);border-radius:14px;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;margin:18px 0}
.summary .l{font-size:13.5px;color:var(--gray-1)}
.summary .l b{display:block;font-size:16px;color:var(--ink);letter-spacing:-0.02em}
.summary .r{font-size:22px;font-weight:900;color:var(--blue);letter-spacing:-0.03em}

.note{font-size:13px;color:var(--gray-2);background:#fff;border:1px dashed var(--line);border-radius:12px;padding:12px 14px;line-height:1.6}
.note b{color:var(--gray-1)}
.notice-list{padding-left:18px;color:var(--gray-1);font-size:14px}
.notice-list li{margin-bottom:6px}

.steps{display:flex;gap:8px;align-items:center;justify-content:center;font-size:12.5px;font-weight:700;color:var(--gray-2);margin:18px 0 6px}
.steps .s{padding:4px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
.steps .s.on{background:var(--blue);color:#fff;border-color:var(--blue)}

/* 결과 페이지 */
.result{text-align:center;padding:40px 0 20px}
.result .icon{width:64px;height:64px;border-radius:50%;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-size:30px}
.result .icon.ok{background:#EAF6F0;color:var(--green)}
.result .icon.no{background:#FDEEF0;color:var(--red)}
.result h1{font-size:24px;font-weight:900;letter-spacing:-0.03em}
.result p{color:var(--gray-1);margin-top:8px}
.receipt{background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px 18px;margin:20px 0;text-align:left}
.receipt div{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.receipt div:last-child{border-bottom:none}
.receipt span:first-child{color:var(--gray-2)}
.receipt span:last-child{font-weight:700}

/* 문서(환불규정·약관) */
.doc h1{font-size:24px;font-weight:900;letter-spacing:-0.03em;margin-bottom:6px}
.doc .updated{font-size:12.5px;color:var(--gray-2);margin-bottom:18px}
.doc h2{font-size:16.5px;font-weight:900;margin:24px 0 8px;letter-spacing:-0.02em}
.doc p,.doc li{font-size:14.5px;color:var(--gray-1)}
.doc ol,.doc ul{padding-left:20px}
.doc li{margin-bottom:6px}
.doc table{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
.doc th,.doc td{border:1px solid var(--line);padding:9px 10px;text-align:left}
.doc th{background:var(--surface);font-weight:800}

/* 푸터 */
footer{margin-top:40px;padding:26px 0 40px;border-top:1px solid var(--line);font-size:12.5px;color:var(--gray-2);line-height:1.8}
footer .links{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:10px;font-weight:700}
footer .links a{color:var(--gray-1)}
footer .biz span{display:inline-block;margin-right:12px}
.loading{display:none;text-align:center;padding:30px;color:var(--gray-2)}
.spin{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--blue);border-radius:50%;margin:0 auto 10px;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.alert{display:none;background:#FDEEF0;color:var(--red);border-radius:12px;padding:12px 14px;font-size:13.5px;font-weight:700;margin-bottom:14px}