/* 디자인 토큰: ai교육ui(Executive Blueprint) DESIGN.md 의 색·모서리·컴포넌트 모양을 따른다.
   외부 글꼴·라이브러리는 쓰지 않는다(첫 화면 외부 요청 0) — 글꼴은 시스템 한글 글꼴로 대체. */
:root{
	--bg:#f8fafc;--surface:#ffffff;--ink:#0f172a;--text:#334155;--muted:#596579;--line:#e2e8f0;--line-strong:#cbd5e1;
	--brand:#1e3a8a;--brand-hover:#172554;--brand-ink:#ffffff;--brand-soft:#eff6ff;--ring:#3b82f6;
	--warn:#92400e;--warn-bg:#fef3c7;--warn-line:#f59e0b;--notice-warn-bg:#fffbeb;--notice-warn-line:#d97706;--notice-warn-ink:#78350f;
	--err:#dc2626;--ok:#059669;
	--r-sm:2px;--r:4px;--r-lg:8px;--r-xl:12px;
	--shadow:0 1px 3px 0 rgba(15,23,42,.05);
}
@media (prefers-color-scheme:dark){
	:root:not([data-theme="light"]){--bg:#0e1526;--surface:#162038;--ink:#e8eefb;--text:#c5d0e6;--muted:#9fb0cc;--line:#26324f;--line-strong:#36456b;--brand:#9db4ff;--brand-hover:#b9c9ff;--brand-ink:#0b1430;--brand-soft:#18274a;--ring:#7da2ff;--warn:#f6c667;--warn-bg:#33270c;--warn-line:#a8741a;--notice-warn-bg:#2b2109;--notice-warn-line:#d9a441;--notice-warn-ink:#f3d79a;--err:#ff8a80;--shadow:0 1px 3px 0 rgba(0,0,0,.3)}
}
:root[data-theme="dark"]{--bg:#0e1526;--surface:#162038;--ink:#e8eefb;--text:#c5d0e6;--muted:#9fb0cc;--line:#26324f;--line-strong:#36456b;--brand:#9db4ff;--brand-hover:#b9c9ff;--brand-ink:#0b1430;--brand-soft:#18274a;--ring:#7da2ff;--warn:#f6c667;--warn-bg:#33270c;--warn-line:#a8741a;--notice-warn-bg:#2b2109;--notice-warn-line:#d9a441;--notice-warn-ink:#f3d79a;--err:#ff8a80;--shadow:0 1px 3px 0 rgba(0,0,0,.3)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.625 "Noto Sans KR","Pretendard","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;word-break:keep-all;overflow-wrap:break-word;-webkit-text-size-adjust:100%}
a{color:var(--brand)}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.wrap{padding:0 32px}}
.draft{background:var(--warn-bg);color:var(--warn);border-bottom:1px solid var(--warn-line);font-size:.875rem;text-align:center;padding:.5rem 16px}
header.top{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow)}
@supports (backdrop-filter:blur(8px)){header.top{background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(12px)}}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.logo{font-weight:700;letter-spacing:-.02em;text-decoration:none;color:var(--brand);font-size:1.125rem}
header.top nav{display:flex;gap:4px;font-size:.875rem;font-weight:600;flex-wrap:wrap}
header.top nav a{color:var(--muted);text-decoration:none;padding:.4rem .7rem;border-radius:var(--r)}
header.top nav a:hover{color:var(--ink);background:var(--brand-soft)}
section{padding:56px 0}
section+section{border-top:1px solid var(--line)}
h1,h2,h3{color:var(--ink)}
h1{font-size:clamp(1.75rem,5vw,2.25rem);line-height:1.25;letter-spacing:-.02em;font-weight:700;margin:0 0 12px;color:var(--brand)}
h2{font-size:clamp(1.375rem,3.5vw,1.75rem);line-height:1.3;letter-spacing:-.02em;font-weight:700;margin:0 0 8px}
h3{font-size:1.125rem;line-height:1.45;font-weight:600;margin:0 0 4px}
.lead{color:var(--muted);font-size:1.0625rem;margin:0 0 24px;max-width:46em}
.hero{padding:56px 0 48px;background:linear-gradient(180deg,var(--brand-soft),var(--bg))}
.hero form{display:flex;gap:8px;flex-wrap:wrap;max-width:640px}
.hero input[type=url]{flex:1 1 260px}
input[type=text],input[type=email],input[type=url],input[type=tel],textarea,select{width:100%;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r);padding:0 14px;min-height:44px}
textarea{padding:.7rem 14px;min-height:88px;resize:vertical}
input::placeholder,textarea::placeholder{color:#94a3b8}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
button:focus-visible,a:focus-visible{outline:2px solid var(--ring);outline-offset:2px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.65rem 1.25rem;border:0;border-radius:var(--r);background:var(--brand);color:var(--brand-ink);font:inherit;font-weight:600;letter-spacing:.01em;cursor:pointer;text-decoration:none;transition:background .15s}
.btn:hover{background:var(--brand-hover)}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line-strong)}
.btn.ghost:hover{background:var(--brand-soft)}
.hint{color:var(--muted);font-size:.8125rem;margin:.3rem 0 0}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;counter-reset:s;padding:0;list-style:none;margin:0}
.steps li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px;counter-increment:s}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--brand);color:var(--brand-ink);font-weight:700;font-size:.875rem;margin-bottom:8px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px;display:flex;flex-direction:column;gap:8px}
.card p{margin:0;color:var(--muted);font-size:.9375rem}
.card .eg{font-size:.875rem;color:var(--text);background:var(--brand-soft);border-radius:var(--r);padding:.35rem .6rem}
.card button{margin-top:auto}
.notice{background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:var(--r);padding:16px 18px;margin:16px 0}
.notice.warn{background:var(--notice-warn-bg);border-left-color:var(--notice-warn-line);color:var(--notice-warn-ink)}
.notice.warn h3{color:var(--notice-warn-ink)}
.notice h3{margin-bottom:6px}
.notice ul{margin:.4rem 0 0;padding-left:1.2rem}
form.apply{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--shadow);padding:32px;display:grid;gap:24px}
fieldset{border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;margin:0;display:grid;gap:12px}
legend{font-weight:600;color:var(--ink);padding:0 6px}
label{display:block;font-weight:600;color:var(--ink)}
label small{font-weight:400;color:var(--muted)}
.opt{display:grid;gap:10px}
.opt label,.check label{display:flex;gap:10px;align-items:flex-start;font-weight:400;color:var(--text)}
.opt input,.check input{margin-top:.3rem;width:18px;height:18px;flex:none;accent-color:var(--brand)}
.opt label strong{font-weight:600;color:var(--ink)}
.sub{display:none;gap:12px;padding:12px 14px;border-left:3px solid var(--line-strong);margin-left:6px}
.sub.on{display:grid}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.check{display:grid;gap:10px}
.err{color:var(--err);font-size:.8125rem;display:none}
.err.on{display:block}
.result{display:none}
.result.on{display:block}
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:14px 18px}
details+details{margin-top:10px}
summary{cursor:pointer;font-weight:600;color:var(--ink)}
details p{margin:.5rem 0 0;color:var(--muted)}
footer{border-top:1px solid var(--line);background:var(--surface);padding:32px 0;color:var(--muted);font-size:.9375rem}
footer .wrap{display:grid;gap:8px}
.prose{max-width:46em}
.prose h2{margin-top:32px}
.prose li{margin:.3rem 0}
.todo{background:var(--warn-bg);color:var(--warn);border:1px solid var(--warn-line);border-radius:var(--r);padding:0 .4em;font-weight:600;font-size:.9em}
@media (max-width:560px){section{padding:40px 0}form.apply{padding:16px}.steps,.cards{gap:16px}header.top nav a{padding:.4rem .5rem}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}
/* 결제·체험 신청 화면 */
.btn.big{min-height:52px;padding:.8rem 1.6rem;font-size:1.0625rem}
.row{display:flex;gap:12px;flex-wrap:wrap}
.chip{min-height:36px;padding:.3rem .8rem;border:1px solid var(--line-strong);border-radius:var(--r);background:var(--surface);color:var(--text);font:inherit;font-size:.875rem;font-weight:600;cursor:pointer}
.chip.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.demo-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;background:var(--warn-bg);border:1px dashed var(--warn-line);border-radius:var(--r-lg);padding:10px 12px;margin:0 0 20px}
.demo-label{font-size:.8125rem;font-weight:700;color:var(--warn)}
.pay-box{display:grid;gap:24px;max-width:720px}
.summary,.state{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--shadow);padding:24px}
.summary h2,.state h2{font-size:1.25rem}
.summary dl,.receipt{margin:0}
.summary dl>div,.receipt>div{display:flex;gap:16px;justify-content:space-between;padding:10px 0;border-top:1px solid var(--line)}
.summary dl>div:first-child{border-top:0}
dt{color:var(--muted);flex:none;min-width:5em}
dd{margin:0;text-align:right;color:var(--ink)}
.summary .total dd{font-size:1.25rem;font-weight:700;color:var(--brand)}
.summary .total small{display:block;font-size:.8125rem;font-weight:400;color:var(--muted)}
.state{display:none}
.state.on{display:block}
.state>*+*{margin-top:14px}
.state>h2+*{margin-top:8px}
.timer{font-size:1.0625rem}
.timer strong{font-variant-numeric:tabular-nums;color:var(--brand);font-size:1.25rem}
.progress{color:var(--muted);display:flex;align-items:center;gap:8px;font-size:.9375rem}
.dot{width:10px;height:10px;border-radius:50%;background:var(--brand);animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{50%{opacity:.25}}
.notice.ok{background:color-mix(in srgb,var(--ok) 10%,var(--surface));border-left-color:var(--ok)}
.notice p{margin:0}
.slots{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.slots li{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border:1px solid var(--line);border-radius:var(--r-lg);padding:12px 14px}
.seats b{color:var(--brand)}
@media (prefers-reduced-motion:reduce){.dot{animation:none}}