/* =========================================================
   스터디코칭 ON 코딩 (code.primeadmit.co.kr)
   1:1 온라인 화상 코딩 랜딩 · 상상코칭 하우코딩 프로그램 기반
   방향: 인디고 + 라임 하이라이트 · 코드 에디터 모티프
   ========================================================= */
:root{
  --ink:#17161f;
  --ink-soft:#45424f;
  --muted:#7a7686;
  --line:#e9e7ef;
  --line-strong:#dcd9e6;
  --paper:#ffffff;
  --mist:#f5f4fa;
  --mist-deep:#eeecf6;
  --brand:#5b4be8;
  --brand-ink:#4536c9;
  --brand-soft:#ece9fd;
  --accent:#c6f24e;
  --code-bg:#16151f;
  --code-bg-2:#211f2e;
  --code-line:#2f2c40;
  --code-dim:#8b86a3;
  --ok:#1f9d6b;
  --maxw:1140px;
  --r-lg:16px;
  --r-md:11px;
  --r-sm:8px;
  --font:'Pretendard Variable','Pretendard',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular',ui-monospace,Menlo,Consolas,monospace;
  --shadow:0 1px 2px rgba(23,22,31,.04), 0 22px 48px -30px rgba(23,22,31,.28);
  --shadow-hover:0 1px 2px rgba(23,22,31,.05), 0 28px 56px -26px rgba(23,22,31,.34);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.68;font-size:16px;word-break:keep-all;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:1rem}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:820px}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.021em}
h1,h2{font-weight:780}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--brand);color:#fff}
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section.mist{background:var(--mist);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:640px;margin-bottom:44px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{font-family:var(--mono);font-size:.74rem;font-weight:600;letter-spacing:.12em;color:var(--brand);text-transform:uppercase;margin-bottom:16px}
.sec-head h2{font-size:clamp(1.7rem,3.2vw,2.3rem);font-weight:780;letter-spacing:-.03em}
.sec-head p{margin-top:16px;font-size:1.04rem;color:var(--ink-soft)}
.mark-hi{background:linear-gradient(transparent 62%,var(--accent) 62%);padding:0 2px}

/* ---------- 버튼 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:var(--r-sm);font-weight:650;font-size:.95rem;border:1px solid transparent;transition:background .15s,color .15s,border-color .15s,transform .15s}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-ink)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:var(--mist)}
.btn-light{background:#fff;color:var(--brand-ink);border-color:#fff}
.btn-light:hover{background:var(--brand-soft)}
.btn-lg{padding:16px 28px;font-size:1rem;border-radius:var(--r-md)}
.btn-block{width:100%}

/* ---------- 프로모 띠 ---------- */
.promobar{background:var(--code-bg);color:rgba(255,255,255,.8);text-align:center;font-size:.8rem;line-height:1.5;padding:9px 16px;font-family:var(--mono);letter-spacing:.01em}
.promobar b{color:var(--accent);font-weight:600}

/* ---------- 헤더 ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.top.is-scrolled{border-bottom-color:var(--line)}
.top-in{display:flex;align-items:center;gap:28px;height:66px}
.logo{display:flex;align-items:center;gap:9px;font-weight:780;font-size:1.1rem;letter-spacing:-.02em}
.logo-mark{width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:.82rem;font-weight:700}
.logo small{display:block;font-family:var(--mono);font-size:.6rem;font-weight:500;color:var(--muted);letter-spacing:.04em;margin-top:1px}
.nav{display:flex;gap:24px;margin-left:auto;font-weight:550;font-size:.92rem;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.top-cta{display:flex;align-items:center;gap:14px}
.top-cta .tel{font-weight:700;color:var(--ink);letter-spacing:.01em;font-variant-numeric:tabular-nums;font-size:.95rem}
.ham{display:none;margin-left:auto;background:none;border:0;width:40px;height:40px;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.ham span{display:block;width:22px;height:2px;background:var(--ink);transition:.2s}
.ham.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.ham.is-open span:nth-child(2){opacity:0}
.ham.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mnav{display:none;flex-direction:column;border-top:1px solid var(--line);background:var(--paper);padding:8px 24px 16px}
.mnav.is-open{display:flex}
.mnav a{padding:13px 4px;border-bottom:1px solid var(--line);font-weight:550}
.mnav-cta{color:var(--brand);font-weight:700}

/* ---------- 히어로 ---------- */
.hero{padding:78px 0 72px;background:radial-gradient(1100px 460px at 78% -8%,var(--brand-soft),transparent 62%)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.35rem);line-height:1.16;font-weight:800;letter-spacing:-.035em}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero .lead{margin-top:22px;font-size:1.07rem;color:var(--ink-soft);max-width:520px}
.hero-points{margin-top:26px;display:flex;flex-direction:column;gap:11px}
.hero-points li{padding-left:27px;position:relative;font-size:.95rem;color:var(--ink-soft)}
.hero-points li::before{content:"";position:absolute;left:0;top:6px;width:16px;height:16px;background:var(--brand);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M4 10.5l3.6 3.6L16 5.8' stroke='%23000' stroke-width='2.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M4 10.5l3.6 3.6L16 5.8' stroke='%23000' stroke-width='2.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}
.hero-points b{color:var(--ink);font-weight:650}
.hero-actions{margin-top:34px;display:flex;gap:10px;flex-wrap:wrap}
.hero-fine{margin-top:16px;font-size:.82rem;color:var(--muted)}

/* 코드 에디터 목업 */
.editor{background:var(--code-bg);border-radius:14px;overflow:hidden;box-shadow:0 40px 80px -40px rgba(59,47,143,.55);border:1px solid var(--code-line)}
.editor-bar{display:flex;align-items:center;gap:7px;padding:12px 15px;background:var(--code-bg-2);border-bottom:1px solid var(--code-line)}
.editor-bar i{width:11px;height:11px;border-radius:50%;background:#3a3750;display:block}
.editor-bar i:nth-child(1){background:#ff5f57}
.editor-bar i:nth-child(2){background:#febc2e}
.editor-bar i:nth-child(3){background:#28c840}
.editor-bar span{margin-left:8px;font-family:var(--mono);font-size:.72rem;color:var(--code-dim)}
.editor-body{padding:18px 20px 22px;font-family:var(--mono);font-size:.82rem;line-height:1.85;color:#d9d5ec;counter-reset:ln;overflow-x:auto}
.editor-body .row{display:block;white-space:pre}
.editor-body .row::before{counter-increment:ln;content:counter(ln);display:inline-block;width:1.6em;margin-right:1.4em;color:#4b4763;text-align:right}
.t-key{color:#c792ea}
.t-fn{color:#82aaff}
.t-str{color:#c3e88d}
.t-num{color:#f78c6c}
.t-com{color:#5f5a76;font-style:italic}
.editor-out{background:var(--code-bg-2);border-top:1px solid var(--code-line);padding:13px 20px;font-family:var(--mono);font-size:.78rem;color:var(--code-dim)}
.editor-out b{color:var(--accent);font-weight:600}
.editor-tag{position:absolute;right:-14px;bottom:26px;background:var(--accent);color:var(--ink);font-family:var(--mono);font-size:.72rem;font-weight:700;padding:7px 12px;border-radius:8px;box-shadow:var(--shadow)}
.hero-visual{position:relative}

/* ---------- 신뢰 스트립 ---------- */
.trust{border-bottom:1px solid var(--line)}
.trust-in{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.trust-cell{background:var(--paper);padding:26px 22px}
.trust-cell b{display:block;font-size:1.3rem;font-weight:780;letter-spacing:-.02em}
.trust-cell span{font-size:.86rem;color:var(--muted)}

/* ---------- 카드 그리드 ---------- */
.cards{display:grid;gap:20px}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.cards.c4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;transition:border-color .15s,transform .15s,box-shadow .15s}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow)}
.card .ic{width:38px;height:38px;border-radius:10px;background:var(--brand-soft);color:var(--brand-ink);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-weight:700;font-size:.92rem;margin-bottom:16px}
.card h3{font-size:1.08rem;font-weight:700}
.card p{margin-top:9px;font-size:.93rem;color:var(--ink-soft)}
.card .src{margin-top:12px;font-size:.76rem;color:var(--muted)}

/* ---------- 커리큘럼 탭 ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.tab{border:1px solid var(--line-strong);background:var(--paper);border-radius:999px;padding:10px 18px;font-weight:600;font-size:.9rem;color:var(--ink-soft);display:flex;align-items:center;gap:9px}
.tab .lang{font-family:var(--mono);font-size:.72rem;color:var(--muted)}
.tab.is-on{background:var(--ink);color:#fff;border-color:var(--ink)}
.tab.is-on .lang{color:var(--accent)}
.track{display:none}
.track.is-on{display:block}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:st}
.step{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);padding:22px}
.step::before{counter-increment:st;content:"STEP " counter(st);font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.08em;color:var(--brand)}
.step h4{margin-top:8px;font-size:1rem;font-weight:700}
.step p{margin-top:7px;font-size:.88rem;color:var(--ink-soft)}
.track-note{margin-top:20px;font-size:.86rem;color:var(--muted);padding-left:16px;border-left:2px solid var(--brand-soft)}

/* ---------- 진행 방식 타임라인 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.flow-item{position:relative;padding:0 22px}
.flow-item:not(:last-child)::after{content:"";position:absolute;top:19px;right:-1px;width:2px;height:calc(100% - 30px);background:var(--line)}
.flow-num{width:40px;height:40px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-weight:700;font-size:.9rem;margin-bottom:16px}
.flow-item h4{font-size:1.02rem;font-weight:700}
.flow-item p{margin-top:8px;font-size:.9rem;color:var(--ink-soft)}

/* ---------- 대상 & 수업료 ---------- */
.plan{display:grid;grid-template-columns:1.1fr .9fr;gap:0;border:1px solid var(--line-strong);border-radius:var(--r-lg);overflow:hidden;background:var(--paper)}
.plan-main{padding:38px}
.plan-main h3{font-size:1.35rem;font-weight:780}
.plan-list{margin-top:22px;display:flex;flex-direction:column}
.plan-list li{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.plan-list li:last-child{border-bottom:0}
.plan-list li span{color:var(--muted)}
.plan-list li b{font-weight:650;text-align:right}
.plan-side{background:var(--code-bg);color:#fff;padding:38px;display:flex;flex-direction:column;justify-content:center}
.plan-side .k{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;color:var(--code-dim);text-transform:uppercase}
.plan-side .v{margin-top:10px;font-size:1.5rem;font-weight:780;line-height:1.35}
.plan-side p{margin-top:12px;font-size:.86rem;color:rgba(255,255,255,.68)}
.plan-side .btn{margin-top:22px}

/* ---------- 만들게 되는 것 ---------- */
.builds{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.build{border:1px solid var(--line);border-radius:var(--r-md);padding:20px;background:var(--paper)}
.build .tagline{font-family:var(--mono);font-size:.72rem;color:var(--brand);font-weight:600}
.build h4{margin-top:8px;font-size:.98rem;font-weight:700}
.build p{margin-top:6px;font-size:.85rem;color:var(--ink-soft)}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;font-weight:650;font-size:1.02rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:19px;font-size:1.4rem;font-weight:400;color:var(--brand);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 44px 24px 0;color:var(--ink-soft);font-size:.95rem}

/* ---------- 신청 폼 ---------- */
.apply{background:var(--code-bg);color:#fff}
.apply .sec-head h2{color:#fff}
.apply .sec-head p{color:rgba(255,255,255,.7)}
.apply-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.apply-aside .k{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;color:var(--code-dim);text-transform:uppercase;margin-bottom:8px}
.apply-aside .tel-big{font-size:1.7rem;font-weight:780;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.apply-aside ul{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.apply-aside li{padding-left:24px;position:relative;font-size:.92rem;color:rgba(255,255,255,.78)}
.apply-aside li::before{content:"›";position:absolute;left:4px;color:var(--accent);font-weight:700}
.form{background:var(--paper);border-radius:var(--r-lg);padding:30px;color:var(--ink)}
.field{margin-bottom:16px}
.field label{display:block;font-size:.84rem;font-weight:650;margin-bottom:7px}
.field label .req{color:var(--brand);margin-left:3px}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line-strong);border-radius:var(--r-sm);padding:12px 13px;background:var(--paper);transition:border-color .15s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand)}
.field textarea{min-height:88px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.radio-row{display:flex;gap:8px;flex-wrap:wrap}
.radio-row label{display:flex;align-items:center;gap:6px;border:1px solid var(--line-strong);border-radius:999px;padding:8px 14px;font-size:.86rem;font-weight:550;cursor:pointer;margin:0}
.radio-row input{width:auto}
.agree{display:flex;gap:9px;align-items:flex-start;font-size:.83rem;color:var(--muted);margin:4px 0 18px}
.agree input{width:auto;margin-top:3px}
.form-ok{background:var(--brand-soft);color:var(--brand-ink);border-radius:var(--r-sm);padding:13px 15px;font-size:.9rem;font-weight:600;margin-bottom:14px}

/* ---------- 푸터 ---------- */
.foot{background:var(--ink);color:rgba(255,255,255,.62);padding:52px 0 40px;font-size:.86rem}
.foot-top{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand{font-weight:780;font-size:1.06rem;color:#fff;display:flex;align-items:center;gap:9px}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-links a:hover{color:#fff}
.foot-note{margin-top:24px;line-height:1.7}
.foot-note b{color:rgba(255,255,255,.82);font-weight:600}
.foot-legal{margin-top:16px;font-size:.78rem;color:rgba(255,255,255,.4)}

/* ---------- 블로그 ---------- */
.art-hero{padding:64px 0 40px;background:radial-gradient(900px 380px at 80% -20%,var(--brand-soft),transparent 60%);border-bottom:1px solid var(--line)}
.crumb{font-family:var(--mono);font-size:.78rem;color:var(--muted);margin-bottom:16px}
.crumb a:hover{color:var(--brand)}
.art-hero h1{font-size:clamp(1.8rem,3.6vw,2.5rem);font-weight:800;letter-spacing:-.03em;max-width:760px}
.art-meta{margin-top:14px;font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.blog-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.blog-card{display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;transition:border-color .15s,transform .15s,box-shadow .15s}
.blog-card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow)}
.blog-card .tag{display:inline-block;background:var(--brand-soft);color:var(--brand-ink);font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.05em;padding:4px 9px;border-radius:999px}
.blog-card .date{margin-left:8px;font-family:var(--mono);font-size:.74rem;color:var(--muted)}
.blog-card h3{margin-top:13px;font-size:1.12rem;font-weight:700;letter-spacing:-.02em}
.blog-card p{margin-top:9px;font-size:.92rem;color:var(--ink-soft)}
.blog-card .go{display:inline-block;margin-top:14px;font-weight:650;font-size:.88rem;color:var(--brand)}
.blog-empty{grid-column:1/-1;border:1px dashed var(--line-strong);border-radius:var(--r-md);padding:24px;font-size:.9rem;color:var(--muted);text-align:center}
.prose{max-width:740px}
.prose h2{font-size:1.32rem;font-weight:750;margin:36px 0 12px;letter-spacing:-.02em}
.prose h3{font-size:1.08rem;font-weight:700;margin:26px 0 10px}
.prose p{margin:0 0 15px;color:var(--ink-soft);font-size:1rem}
.prose strong{color:var(--ink);font-weight:650}
.prose img{border-radius:var(--r-md);margin:20px 0}
.prose ul{list-style:disc;padding-left:22px;margin:0 0 15px;color:var(--ink-soft)}
.prose ul li{margin:5px 0}
.prose .faq-list{margin-top:14px}
.prose .faq{border-top:1px solid var(--line);padding:16px 0}
.prose .faq b{display:block;margin-bottom:6px}

/* ---------- 반응형 ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .trust-in{grid-template-columns:repeat(2,1fr)}
  .cards.c3,.cards.c4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr;gap:28px 0}
  .flow-item:not(:last-child)::after{display:none}
  .plan,.apply-grid{grid-template-columns:1fr}
  .builds{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .section{padding:60px 0}
  .nav,.top-cta{display:none}
  .ham{display:flex}
  .trust-in{grid-template-columns:1fr}
  .cards.c3,.cards.c4,.steps,.builds,.blog-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .foot-top{flex-direction:column;gap:18px}
}