/* ==========================================================================
   TOP EDU PREP — brand tokens
   Visual concept: the OMR answer sheet. Test prep's most iconic object is
   the bubble sheet — filled circles, ruled score bands, red correction marks.
   That vocabulary (●○, ruled rows, tick marks) is used structurally, not as
   decoration, throughout the site.
   ========================================================================== */

@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=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --ink:#10192B;
  --ink-soft:#334063;
  --paper:#EEF1F6;
  --paper-raise:#FFFFFF;
  --line:#D3D9E4;
  --signal:#E4402F;
  --signal-dark:#C3311F;
  --gold:#C79A3D;
  --correct:#1F8A5F;
  --radius:2px;
  --shadow:0 1px 0 rgba(16,25,43,.05), 0 8px 24px rgba(16,25,43,.06);
  --font-display:'Space Grotesk', 'Pretendard Variable', sans-serif;
  --font-body:'Pretendard Variable', -apple-system, sans-serif;
  --font-mono:'IBM Plex Mono', monospace;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-0.01em;font-weight:700;line-height:1.2;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
.mono{font-family:var(--font-mono);}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}
:focus-visible{outline:3px solid var(--signal);outline-offset:2px;}

/* ---------- OMR bubble marker system ---------- */
.bubble{
  display:inline-block;width:.62em;height:.62em;border-radius:50%;
  border:1.6px solid currentColor;flex-shrink:0;
}
.bubble.filled{background:currentColor;}
.bubble-row{display:flex;gap:5px;align-items:center;}

/* ---------- Top utility bar ---------- */
.topbar{
  background:var(--ink);color:#C7CEDD;font-size:12.5px;
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px;}
.topbar a{color:#fff;}
.topbar .tb-links{display:flex;gap:18px;}
.topbar .tb-links a:hover{color:var(--gold);}

/* ---------- Header / nav ---------- */
header.site{
  position:sticky;top:0;z-index:100;background:rgba(238,241,246,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:76px;}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-size:21px;font-weight:700;color:var(--ink);}
.logo .mark{
  width:30px;height:30px;border-radius:50%;border:2.5px solid var(--signal);
  display:flex;align-items:center;justify-content:center;
}
.logo .mark::after{content:'';width:12px;height:12px;border-radius:50%;background:var(--signal);}
.logo small{display:block;font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.14em;color:var(--signal);margin-top:2px;}

nav.main{display:flex;gap:2px;}
nav.main a{
  padding:10px 16px;font-size:14.5px;font-weight:600;color:var(--ink-soft);
  border-radius:var(--radius);position:relative;
}
nav.main a:hover,nav.main a.active{color:var(--ink);}
nav.main a.active::after{
  content:'';position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:var(--signal);
}
.nav-cta{
  display:flex;gap:10px;align-items:center;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 22px;font-weight:700;font-size:14.5px;
  border-radius:var(--radius);border:1.6px solid var(--ink);white-space:nowrap;
}
.btn-primary{background:var(--signal);border-color:var(--signal);color:#fff;}
.btn-primary:hover{background:var(--signal-dark);border-color:var(--signal-dark);}
.btn-outline{background:transparent;color:var(--ink);}
.btn-outline:hover{background:var(--ink);color:#fff;}
.btn-ghost{border-color:transparent;padding:11px 8px;}
.btn.sm{padding:8px 16px;font-size:13.5px;}
.btn.block{width:100%;justify-content:center;}

.hamburger{display:none;background:none;border:none;flex-direction:column;gap:5px;padding:8px;}
.hamburger span{width:24px;height:2px;background:var(--ink);display:block;}

/* ---------- Hero ---------- */
.hero{
  padding:64px 0 76px;position:relative;overflow:hidden;
  background:
    linear-gradient(180deg,#F4F6FA 0%, var(--paper) 100%);
  border-bottom:1px solid var(--line);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);
  font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--signal);
  background:#FCE9E6;border:1px solid #F3C6BE;padding:6px 12px;border-radius:100px;margin-bottom:22px;
}
.hero h1{font-size:46px;margin-bottom:20px;color:var(--ink);}
.hero h1 .hl{color:var(--signal);}
.hero p.lead{font-size:16.5px;color:var(--ink-soft);max-width:520px;margin-bottom:32px;}
.hero-actions{display:flex;gap:12px;margin-bottom:36px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:0;border-top:1px solid var(--line);padding-top:22px;}
.hero-stats div{flex:1;padding-right:16px;}
.hero-stats b{display:block;font-family:var(--font-mono);font-size:26px;color:var(--ink);}
.hero-stats span{font-size:12.5px;color:var(--ink-soft);}

/* score-report signature card */
.score-card{
  background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow);
  padding:26px 26px 20px;position:relative;
}
.score-card::before{
  content:'ANSWER SHEET / SCORE REPORT';font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  color:#9AA4BB;position:absolute;top:14px;right:22px;
}
.score-card h4{font-size:13px;color:var(--ink-soft);margin-bottom:16px;font-family:var(--font-mono);letter-spacing:.05em;}
.score-row{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-bottom:1px dashed var(--line);}
.score-row:last-of-type{border-bottom:none;}
.score-row .name{font-size:14px;font-weight:600;}
.score-row .sub{font-size:12px;color:var(--ink-soft);}
.score-row .delta{
  font-family:var(--font-mono);font-weight:700;font-size:15px;color:var(--correct);
  display:flex;align-items:center;gap:6px;
}
.score-row .delta .from{color:#9AA4BB;font-weight:500;text-decoration:line-through;}
.omr-strip{display:flex;gap:6px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.omr-strip .bubble{color:var(--line);}
.omr-strip .bubble.filled{color:var(--signal);}

/* ---------- Section basics ---------- */
section{padding:84px 0;}
section.tight{padding:56px 0;}
.section-head{max-width:640px;margin-bottom:48px;}
.section-head .eyebrow{margin-bottom:16px;}
.section-head h2{font-size:32px;color:var(--ink);margin-bottom:14px;}
.section-head p{color:var(--ink-soft);font-size:15.5px;}
.alt-bg{background:var(--paper-raise);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:20px;}
.grid.cols-2{grid-template-columns:1fr 1fr;}
.grid.cols-3{grid-template-columns:repeat(3,1fr);}
.grid.cols-4{grid-template-columns:repeat(4,1fr);}
.grid.cols-5{grid-template-columns:repeat(5,1fr);}

.card{
  background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;padding:26px;
  transition:transform .15s ease, box-shadow .15s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.card .num{font-family:var(--font-mono);font-size:12px;color:var(--signal);letter-spacing:.08em;margin-bottom:12px;display:block;}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:14px;color:var(--ink-soft);}

.tag{
  display:inline-block;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.05em;
  padding:4px 10px;border-radius:100px;border:1px solid var(--line);color:var(--ink-soft);margin-right:6px;margin-bottom:6px;
}
.tag.signal{color:var(--signal);border-color:#F3C6BE;background:#FCE9E6;}

/* ---------- Program / track table ---------- */
.track{
  display:grid;grid-template-columns:220px 1fr;gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;
  background:var(--paper-raise);margin-bottom:16px;
}
.track .track-label{
  background:var(--ink);color:#fff;padding:22px;display:flex;flex-direction:column;justify-content:center;
}
.track .track-label b{font-family:var(--font-display);font-size:19px;}
.track .track-label span{font-family:var(--font-mono);font-size:11px;color:#9AA4BB;margin-top:6px;letter-spacing:.06em;}
.track .track-body{padding:22px 26px;display:flex;flex-direction:column;gap:8px;}
.track .track-body .row{display:flex;gap:10px;font-size:14px;color:var(--ink-soft);}
.track .track-body .row b{color:var(--ink);font-weight:600;min-width:88px;}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.step{padding:0 20px 0 0;position:relative;}
.step .bubble-row{margin-bottom:14px;}
.step .bubble-row .idx{font-family:var(--font-mono);font-size:12px;color:var(--ink-soft);}
.step h4{font-size:16px;margin-bottom:8px;}
.step p{font-size:13.5px;color:var(--ink-soft);}

/* ---------- Testimonials ---------- */
.quote-card{
  background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;padding:24px;
  display:flex;flex-direction:column;gap:14px;
}
.quote-card .stars{color:var(--gold);font-size:14px;letter-spacing:2px;}
.quote-card p{font-size:14.5px;color:var(--ink-soft);}
.quote-card .who{display:flex;justify-content:space-between;align-items:center;border-top:1px dashed var(--line);padding-top:12px;margin-top:auto;}
.quote-card .who b{font-size:13.5px;}
.quote-card .who span{font-size:12px;color:#9AA4BB;font-family:var(--font-mono);}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;padding:20px 4px;font-weight:600;font-size:15.5px;
  background:none;border:none;width:100%;text-align:left;color:var(--ink);
}
.faq-q .plus{font-family:var(--font-mono);color:var(--signal);font-size:18px;transition:transform .2s;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-item.open .faq-a{max-height:300px;}
.faq-a p{padding:0 4px 20px;color:var(--ink-soft);font-size:14.5px;}

/* ---------- Form ---------- */
.form-panel{
  background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;padding:36px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;font-weight:600;color:var(--ink);}
.field label .req{color:var(--signal);}
.field input,.field select,.field textarea{
  border:1.4px solid var(--line);border-radius:4px;padding:11px 13px;font-size:14.5px;font-family:inherit;background:#fff;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--signal);}
.checkbox-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-soft);margin:18px 0;}
.checkbox-row input{margin-top:3px;}
.chip-group{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  border:1.4px solid var(--line);padding:8px 14px;border-radius:100px;font-size:13px;cursor:pointer;color:var(--ink-soft);
}
.chip input{display:none;}
.chip.checked{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ---------- Mock test widget ---------- */
.mock-shell{background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;overflow:hidden;}
.mock-head{background:var(--ink);color:#fff;padding:18px 24px;display:flex;justify-content:space-between;align-items:center;}
.mock-head .title{font-family:var(--font-mono);font-size:13px;letter-spacing:.05em;}
.mock-head .timer{font-family:var(--font-mono);font-weight:700;font-size:18px;color:var(--gold);}
.mock-body{padding:32px;}
.mock-progress{display:flex;gap:4px;margin-bottom:26px;}
.mock-progress .dot{flex:1;height:4px;background:var(--line);border-radius:2px;}
.mock-progress .dot.done{background:var(--correct);}
.mock-progress .dot.current{background:var(--signal);}
.q-text{font-size:16.5px;font-weight:600;margin-bottom:22px;line-height:1.55;}
.q-options{display:flex;flex-direction:column;gap:10px;margin-bottom:26px;}
.q-option{
  display:flex;align-items:center;gap:14px;border:1.4px solid var(--line);border-radius:6px;padding:14px 16px;
  background:#fff;font-size:14.5px;
}
.q-option:hover{border-color:var(--ink-soft);}
.q-option.selected{border-color:var(--signal);background:#FCE9E6;}
.q-option.correct{border-color:var(--correct);background:#E7F5EE;}
.q-option.wrong{border-color:var(--signal);background:#FCE9E6;}
.q-option .letter{
  width:26px;height:26px;border-radius:50%;border:1.6px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:12px;font-weight:700;flex-shrink:0;
}
.q-option.selected .letter{border-color:var(--signal);color:var(--signal);}
.mock-foot{display:flex;justify-content:space-between;align-items:center;padding-top:18px;border-top:1px solid var(--line);}
.mock-result{text-align:center;padding:40px 20px;}
.mock-result .score-big{font-family:var(--font-mono);font-size:56px;font-weight:700;color:var(--ink);}
.mock-result .score-big span{font-size:22px;color:#9AA4BB;}

/* ---------- Timeline (exam schedule) ---------- */
.timeline{border-left:2px solid var(--line);margin-left:8px;}
.tl-item{position:relative;padding:0 0 34px 28px;}
.tl-item::before{
  content:'';position:absolute;left:-7px;top:2px;width:12px;height:12px;border-radius:50%;
  background:var(--paper-raise);border:2.5px solid var(--signal);
}
.tl-item .date{font-family:var(--font-mono);font-size:12.5px;color:var(--signal);font-weight:700;letter-spacing:.04em;}
.tl-item h4{font-size:16px;margin:6px 0;}
.tl-item p{font-size:13.5px;color:var(--ink-soft);}

/* ---------- Branch cards ---------- */
.branch-card{background:var(--paper-raise);border:1px solid var(--line);border-radius:6px;overflow:hidden;}
.branch-map{height:150px;background:linear-gradient(135deg,#1B2947,#10192B);position:relative;}
.branch-map::after{
  content:'📍';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:26px;
}
.branch-body{padding:22px;}
.branch-body h3{font-size:18px;margin-bottom:6px;}
.branch-body .addr{font-size:13px;color:var(--ink-soft);margin-bottom:14px;}
.branch-body .meta{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--ink-soft);margin-bottom:16px;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--ink);color:#fff;padding:64px 0;position:relative;overflow:hidden;
}
.cta-band h2{font-size:28px;color:#fff;margin-bottom:12px;}
.cta-band p{color:#AEB7CC;margin-bottom:26px;}
.cta-band .container{position:relative;z-index:1;text-align:center;}
.cta-band .btn-primary{padding:14px 32px;font-size:15px;}

/* ---------- Footer ---------- */
footer.site{background:var(--ink);color:#8C96AE;padding:56px 0 24px;font-size:13.5px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px;}
footer.site h5{color:#fff;font-size:13px;font-family:var(--font-mono);letter-spacing:.06em;margin-bottom:16px;}
footer.site .flogo{font-family:var(--font-display);font-size:19px;color:#fff;margin-bottom:12px;}
footer.site ul li{margin-bottom:9px;}
footer.site a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #253154;padding-top:22px;display:flex;justify-content:space-between;color:#6B7690;font-size:12px;flex-wrap:wrap;gap:8px;}

/* ---------- Breadcrumb / page header (inner pages) ---------- */
.page-hero{
  padding:44px 0 40px;background:var(--paper-raise);border-bottom:1px solid var(--line);
}
.page-hero .crumb{font-family:var(--font-mono);font-size:12px;color:var(--ink-soft);margin-bottom:14px;}
.page-hero .crumb .signal{color:var(--signal);}
.page-hero h1{font-size:34px;}
.page-hero p{color:var(--ink-soft);margin-top:12px;max-width:600px;font-size:15px;}

/* ---------- Utility ---------- */
.mt-0{margin-top:0;}
.center{text-align:center;}
.pill-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px;}
.pill-nav a{
  padding:9px 18px;border:1.4px solid var(--line);border-radius:100px;font-size:13.5px;font-weight:600;color:var(--ink-soft);
}
.pill-nav a.active,.pill-nav a:hover{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr;}
  .grid.cols-2,.grid.cols-3,.grid.cols-4,.grid.cols-5{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .track{grid-template-columns:1fr;}
}
@media (max-width: 720px){
  nav.main{display:none;}
  .hamburger{display:flex;}
  .nav-cta .btn-outline{display:none;}
  .hero h1{font-size:32px;}
  .hero-stats{flex-wrap:wrap;gap:16px;}
  .hero-stats div{flex:1 1 40%;padding-right:0;}
  .grid.cols-2,.grid.cols-3,.grid.cols-4,.grid.cols-5{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  section{padding:56px 0;}
  .topbar .tb-links{display:none;}
  .mock-body{padding:20px;}
}

/* Mobile nav drawer */
.mobile-nav{
  display:none;position:fixed;inset:0;background:var(--ink);z-index:200;padding:24px;
  flex-direction:column;
}
.mobile-nav.open{display:flex;}
.mobile-nav .mn-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;}
.mobile-nav .mn-close{background:none;border:none;color:#fff;font-size:26px;}
.mobile-nav a{color:#fff;font-size:19px;font-weight:600;padding:14px 0;border-bottom:1px solid #253154;}
.mobile-nav .btn{margin-top:24px;}