/* ============================================================
   탑에듀프렙 — AP vs A-Level 비교 가이드
   Design tokens
   Color   : Oxford Navy #1B2A4A (AP/미국) · Claret #7A2331 (A-Level/영국)
             Parchment White #FAFAF7 · Ink #1C1C1C · Hairline #DCD8CE
             Gold accent #B08D3E (signature ledger rule)
   Type    : 'Noto Serif KR' (display, academic serif) +
             'Pretendard' (body/UI sans) + 'IBM Plex Mono' (course codes)
   Layout  : "성적표 원장(transcript ledger)" — split AP | A-Level columns
             with course-code eyebrows, like a real report card.
   ============================================================ */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.css');
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@500;600;700;900&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --navy:#1B2A4A;
  --navy-soft:#2E4270;
  --claret:#7A2331;
  --claret-soft:#9C3A49;
  --paper:#FAFAF7;
  --paper-dim:#F2F0E9;
  --ink:#1C1C1C;
  --ink-soft:#55534C;
  --hairline:#DCD8CE;
  --gold:#B08D3E;
  --radius:2px;
  --serif:'Noto Serif KR', serif;
  --sans:'Pretendard Variable','Pretendard',-apple-system,sans-serif;
  --mono:'IBM Plex Mono',monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;}
img{max-width:100%;}

.wrap{max-width:1080px;margin:0 auto;padding:0 28px;}

/* ---------- Skip link / focus ---------- */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:10px 16px;z-index:999;}
.skip-link:focus{left:12px;top:12px;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--gold);outline-offset:2px;}

/* ---------- Top bar ---------- */
.topbar{border-bottom:1px solid var(--hairline);background:var(--paper);position:sticky;top:0;z-index:50;}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand-mark{width:34px;height:34px;flex:none;}
.brand-name{font-family:var(--serif);font-weight:700;font-size:19px;color:var(--ink);letter-spacing:-.2px;}
.brand-sub{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--ink-soft);text-transform:uppercase;}

nav.mainnav{display:flex;gap:6px;}
nav.mainnav a{
  font-size:14.5px;font-weight:600;padding:9px 14px;border-radius:var(--radius);
  text-decoration:none;color:var(--ink-soft);position:relative;
}
nav.mainnav a:hover{color:var(--ink);background:var(--paper-dim);}
nav.mainnav a[aria-current="page"]{color:var(--navy);}
nav.mainnav a[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:linear-gradient(90deg,var(--navy),var(--claret));
}
.navtoggle{display:none;}

/* ---------- Eyebrow / course-code chips ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  color:var(--ink-soft);text-transform:uppercase;margin-bottom:14px;
}
.code-chip{
  font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.03em;
  padding:3px 8px;border-radius:2px;border:1px solid currentColor;
}
.code-chip.ap{color:var(--navy);}
.code-chip.al{color:var(--claret);}

/* ---------- Hero: dual-system ledger opener ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--hairline);}
.hero .wrap{padding:64px 28px 0;}
.hero h1{
  font-family:var(--serif);font-weight:900;letter-spacing:-.5px;
  font-size:clamp(30px,4.6vw,50px);line-height:1.28;margin:0 0 18px;
}
.hero h1 .ap{color:var(--navy);}
.hero h1 .al{color:var(--claret);}
.hero p.lead{font-size:18px;color:var(--ink-soft);max-width:640px;margin:0 0 34px;}

.hero-split{
  display:grid;grid-template-columns:1fr auto 1fr;
  border-top:1px solid var(--hairline);
}
.hero-panel{padding:26px 6px;}
.hero-panel.ap{text-align:right;}
.hero-panel.al{text-align:left;}
.hero-panel .sys{
  font-family:var(--serif);font-weight:700;font-size:22px;margin:0 0 4px;
}
.hero-panel.ap .sys{color:var(--navy);}
.hero-panel.al .sys{color:var(--claret);}
.hero-panel .sys-desc{font-size:13.5px;color:var(--ink-soft);}
.hero-divider{
  width:2px;background:linear-gradient(180deg,var(--navy),var(--gold) 48%,var(--claret));
  transform:scaleY(0);transform-origin:top;
  animation:drawline 900ms cubic-bezier(.4,0,.2,1) 260ms forwards;
}
@keyframes drawline{to{transform:scaleY(1);}}

/* ---------- Section shell ---------- */
section{padding:64px 0;}
section.tight{padding:40px 0;}
section + section{border-top:1px solid var(--hairline);}
h2.h-serif{
  font-family:var(--serif);font-weight:700;font-size:clamp(24px,3vw,32px);
  letter-spacing:-.3px;margin:0 0 8px;
}
p.section-lead{color:var(--ink-soft);max-width:680px;margin:0 0 34px;font-size:16px;}

/* ---------- Ledger comparison table (signature element) ---------- */
.ledger{
  border:1px solid var(--hairline);background:#fff;border-radius:var(--radius);overflow:hidden;
}
.ledger-row{display:grid;grid-template-columns:1fr 200px 1fr;border-top:1px solid var(--hairline);}
.ledger-row:first-child{border-top:none;}
.ledger-row.head{background:var(--paper-dim);}
.ledger-cell{padding:18px 20px;font-size:14.5px;}
.ledger-cell.ap{border-right:1px solid var(--hairline);color:var(--ink);}
.ledger-cell.al{color:var(--ink);}
.ledger-cell.label{
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink-soft);
  border-right:1px solid var(--hairline);text-transform:uppercase;padding:18px 10px;
}
.ledger-row.head .ledger-cell{
  font-family:var(--serif);font-weight:700;font-size:16px;
}
.ledger-row.head .ledger-cell.ap{color:var(--navy);}
.ledger-row.head .ledger-cell.al{color:var(--claret);}
.ledger-cell b{font-weight:700;}

@media (max-width:720px){
  .ledger-row{grid-template-columns:1fr;}
  .ledger-cell.label{border-right:none;border-bottom:1px solid var(--hairline);justify-content:flex-start;padding:10px 20px;background:var(--paper-dim);}
  .ledger-cell.ap{border-right:none;border-bottom:1px solid var(--hairline);}
}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
@media (max-width:800px){.grid-2,.grid-3{grid-template-columns:1fr;}}
.card{
  border:1px solid var(--hairline);background:#fff;padding:24px 22px;border-radius:var(--radius);
}
.card h3{font-family:var(--serif);font-size:18px;margin:0 0 8px;}
.card p{color:var(--ink-soft);font-size:14.5px;margin:0;}
.card.accent-ap{border-top:3px solid var(--navy);}
.card.accent-al{border-top:3px solid var(--claret);}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--hairline);padding:18px 0;}
.faq-item summary{
  font-family:var(--serif);font-weight:600;font-size:17px;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--gold);transition:transform .2s;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item p{color:var(--ink-soft);margin:12px 0 0;font-size:15px;}

/* ---------- Timeline (for dual-prep strategy) ---------- */
.timeline{border-left:2px solid var(--hairline);margin-left:8px;padding-left:26px;}
.tl-item{position:relative;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-32px;top:4px;width:12px;height:12px;border-radius:50%;
  background:var(--paper);border:2px solid var(--gold);
}
.tl-item h4{font-family:var(--serif);font-size:16.5px;margin:0 0 6px;}
.tl-item p{color:var(--ink-soft);font-size:14.5px;margin:0;}

/* ---------- Callout ---------- */
.callout{
  background:var(--paper-dim);border-left:3px solid var(--gold);padding:20px 22px;
  font-size:14.5px;color:var(--ink-soft);border-radius:0 var(--radius) var(--radius) 0;
}
.callout b{color:var(--ink);}

/* ---------- Internal link band ---------- */
.linkband{display:flex;gap:16px;flex-wrap:wrap;}
.linkband a{
  flex:1;min-width:240px;border:1px solid var(--hairline);background:#fff;padding:18px 20px;
  text-decoration:none;border-radius:var(--radius);display:flex;flex-direction:column;gap:6px;
  transition:border-color .15s, transform .15s;
}
.linkband a:hover{border-color:var(--gold);transform:translateY(-2px);}
.linkband .lb-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-soft);text-transform:uppercase;}
.linkband .lb-title{font-family:var(--serif);font-weight:700;font-size:16px;color:var(--ink);}

/* ---------- CTA ---------- */
.cta-band{background:var(--navy);color:#fff;padding:56px 0;}
.cta-band h2{font-family:var(--serif);font-size:clamp(22px,3vw,30px);margin:0 0 10px;}
.cta-band p{color:#C7CEDD;max-width:560px;margin:0 0 24px;}
.btn{
  display:inline-block;background:var(--gold);color:#1C1C1C;font-weight:700;font-size:14.5px;
  padding:13px 24px;border-radius:2px;text-decoration:none;border:none;cursor:pointer;
}
.btn:hover{background:#c39c47;}
.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4);}
.btn.ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--hairline);padding:40px 0;}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;}
footer .f-brand{font-family:var(--serif);font-weight:700;font-size:15px;}
footer .f-meta{font-size:12.5px;color:var(--ink-soft);margin-top:4px;}
footer .f-links{display:flex;gap:18px;font-size:13.5px;}
footer .f-links a{text-decoration:none;color:var(--ink-soft);}
footer .f-links a:hover{color:var(--ink);}

/* ---------- Print ---------- */
@media print{
  .topbar,.navtoggle,.cta-band,.btn,.hero-split{display:none !important;}
  body{background:#fff;}
  section{padding:18px 0;border-top:1px solid #ccc;}
  a{color:#000;text-decoration:underline;}
}

/* ---------- Mobile nav ---------- */
@media (max-width:860px){
  nav.mainnav{
    position:fixed;inset:76px 0 0 0;background:var(--paper);flex-direction:column;padding:18px 24px;
    transform:translateX(100%);transition:transform .25s ease;overflow:auto;
  }
  nav.mainnav.open{transform:translateX(0);}
  nav.mainnav a{font-size:17px;padding:14px 6px;border-bottom:1px solid var(--hairline);}
  .navtoggle{
    display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;
  }
  .navtoggle span{width:22px;height:2px;background:var(--ink);}
}