/* ============================================================
   TOP EDU PREP — Design System
   Palette : Ink Navy #14213D · Deep Navy #1B2A4A · Brass Gold #C9A227
             Paper #F8F6F1 · Slate #5B6B82 · Score Green #3F7D58
   Display : "Noto Serif KR"  |  Body/UI : "Pretendard"  |  Data : "IBM Plex Mono"
   Signature: exam-day timeline ticker (D-day markers) used across pages
   ============================================================ */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.css');
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@500;600;700;900&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --ink:#14213D;
  --navy:#1B2A4A;
  --navy-soft:#243756;
  --gold:#C9A227;
  --gold-soft:#E4C862;
  --paper:#F8F6F1;
  --paper-dim:#F1EEE5;
  --slate:#5B6B82;
  --slate-light:#8B96A8;
  --line:#DEDACB;
  --green:#3F7D58;
  --white:#FFFFFF;
  --radius:2px;
  --max:1180px;
  --font-display:'Noto Serif KR', serif;
  --font-body:'Pretendard Variable','Pretendard',-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono', monospace;
  --shadow: 0 12px 30px -12px rgba(20,33,61,0.25);
}

*{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:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}
h1,h2,h3,h4{font-family:var(--font-display); color:var(--navy); line-height:1.3; font-weight:700;}
.mono{font-family:var(--font-mono);}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline:2px solid var(--gold); outline-offset:3px;
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important; transition-duration:.01ms !important; scroll-behavior:auto !important;}
}

.wrap{max-width:var(--max); margin:0 auto; padding:0 24px;}

/* ---------- Top utility bar ---------- */
.topbar{
  background:var(--ink); color:var(--paper-dim);
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.02em;
}
.topbar .wrap{display:flex; justify-content:space-between; align-items:center; padding:8px 24px; flex-wrap:wrap; gap:6px;}
.topbar a{color:var(--gold-soft);}
.topbar a:hover{text-decoration:underline;}

/* ---------- Nav ---------- */
header.site-header{
  background:var(--navy); position:sticky; top:0; z-index:100;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
nav.main-nav{display:flex; align-items:center; justify-content:space-between; padding:16px 24px; max-width:var(--max); margin:0 auto;}
.brand{display:flex; align-items:center; gap:10px; color:var(--white); font-family:var(--font-display); font-size:20px; font-weight:700;}
.brand .mark{
  width:34px; height:34px; border:1.5px solid var(--gold); border-radius:50%;
  display:flex; align-items:center; justify-content:center; color:var(--gold);
  font-family:var(--font-mono); font-size:12px; font-weight:600;
}
.nav-links{display:flex; gap:28px; align-items:center;}
.nav-links a{color:var(--paper-dim); font-size:14.5px; font-weight:500; padding:6px 2px; border-bottom:2px solid transparent; transition:.2s;}
.nav-links a:hover, .nav-links a.active{color:var(--white); border-color:var(--gold);}
.nav-cta{background:var(--gold); color:var(--ink); padding:9px 18px; font-weight:700; font-size:13.5px; border-radius:var(--radius); transition:.2s;}
.nav-cta:hover{background:var(--gold-soft);}
.nav-toggle{display:none; background:none; border:none; color:var(--white); font-size:26px; cursor:pointer;}

@media(max-width:920px){
  .nav-links{position:fixed; top:0; right:-100%; height:100vh; width:78vw; max-width:320px; background:var(--navy);
    flex-direction:column; align-items:flex-start; padding:90px 28px 28px; transition:right .3s ease; gap:22px; box-shadow:var(--shadow);}
  .nav-links.open{right:0;}
  .nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(ellipse 900px 500px at 85% -10%, rgba(201,162,39,0.18), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--ink) 100%);
  color:var(--white); padding:76px 24px 60px; position:relative; overflow:hidden;
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:100% 42px;
}
.hero-inner{max-width:var(--max); margin:0 auto; position:relative; z-index:1;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono);
  font-size:12.5px; letter-spacing:.08em; color:var(--gold-soft); text-transform:uppercase;
  border:1px solid rgba(201,162,39,0.4); padding:6px 14px; border-radius:100px; margin-bottom:22px;
}
.eyebrow .dot{width:6px; height:6px; border-radius:50%; background:var(--gold); box-shadow:0 0 0 3px rgba(201,162,39,0.25);}
h1.display{font-size:clamp(32px,5vw,54px); font-weight:900; max-width:820px; letter-spacing:-.01em;}
h1.display .accent{color:var(--gold-soft); font-style:italic;}
.hero-sub{font-size:18px; color:#C7CEDD; max-width:620px; margin-top:18px;}
.hero-ctas{display:flex; gap:14px; margin-top:32px; flex-wrap:wrap;}
.btn{
  display:inline-flex; align-items:center; gap:8px; padding:14px 26px; font-weight:700; font-size:15px;
  border-radius:var(--radius); border:1px solid transparent; cursor:pointer; transition:.2s;
}
.btn-gold{background:var(--gold); color:var(--ink);}
.btn-gold:hover{background:var(--gold-soft); transform:translateY(-1px);}
.btn-outline{border-color:rgba(255,255,255,0.35); color:var(--white);}
.btn-outline:hover{border-color:var(--gold); color:var(--gold-soft);}
.btn-navy{background:var(--navy); color:var(--white);}
.btn-navy:hover{background:var(--navy-soft);}

/* Hero stat / branch strip */
.strip{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(170px,1fr)); gap:1px;
  background:rgba(255,255,255,0.1); margin-top:44px; border:1px solid rgba(255,255,255,0.1); border-radius:var(--radius); overflow:hidden;
}
.strip .cell{background:rgba(255,255,255,0.03); padding:18px 20px;}
.strip .cell b{font-family:var(--font-mono); color:var(--gold-soft); font-size:22px; display:block;}
.strip .cell span{font-size:12.5px; color:#AEB8CB;}

/* ---------- Section basics ---------- */
section{padding:72px 0;}
.section-tight{padding:48px 0;}
.section-head{max-width:640px; margin-bottom:44px;}
.kicker{font-family:var(--font-mono); font-size:12.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--gold); font-weight:600;}
.section-head h2{font-size:clamp(26px,3.4vw,38px); margin-top:10px;}
.section-head p{color:var(--slate); margin-top:14px; font-size:16px;}
.bg-navy{background:var(--navy); color:var(--white);}
.bg-navy h2, .bg-navy h3, .bg-navy h4{color:var(--white);}
.bg-navy .kicker{color:var(--gold-soft);}
.bg-dim{background:var(--paper-dim);}

/* ---------- Timeline ticker (signature element) ---------- */
.ticker{
  display:flex; overflow-x:auto; gap:0; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  scrollbar-width:thin;
}
.ticker .tick{
  flex:0 0 auto; min-width:190px; padding:20px 22px; border-right:1px solid var(--line); position:relative;
}
.ticker .tick:first-child{border-left:1px solid var(--line);}
.ticker .tick .num{font-family:var(--font-mono); font-size:11px; color:var(--gold); letter-spacing:.06em;}
.ticker .tick .d{font-family:var(--font-mono); font-size:19px; font-weight:600; color:var(--navy); margin-top:6px;}
.ticker .tick .label{font-size:13px; color:var(--slate); margin-top:4px;}
.ticker .tick.soon{background:var(--paper-dim);}
.ticker .tick.soon::before{content:"D-DAY"; position:absolute; top:8px; right:14px; font-family:var(--font-mono); font-size:9.5px; color:var(--gold); font-weight:700;}

/* ---------- Cards ---------- */
.grid{display:grid; gap:24px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:920px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

.card{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius);
  padding:28px; transition:.25s; position:relative;
}
.card:hover{transform:translateY(-3px); box-shadow:var(--shadow); border-color:var(--gold);}
.card .tag{font-family:var(--font-mono); font-size:11.5px; color:var(--gold); letter-spacing:.06em; text-transform:uppercase; font-weight:700;}
.card h3{font-size:19px; margin-top:10px;}
.card p{color:var(--slate); font-size:14.5px; margin-top:8px;}

.subject-card{
  background:var(--navy); color:var(--white); border-radius:var(--radius); padding:32px 28px;
  border-top:3px solid var(--gold);
}
.subject-card h3{color:var(--white); font-size:22px;}
.subject-card p{color:#B9C2D6; font-size:14.5px; margin-top:10px;}
.subject-card ul{margin-top:16px; display:flex; flex-direction:column; gap:8px;}
.subject-card li{font-size:13.5px; color:#D7DCE8; padding-left:16px; position:relative;}
.subject-card li::before{content:"—"; position:absolute; left:0; color:var(--gold);}
.subject-card a.btn{margin-top:20px;}

/* ---------- Online strength banner ---------- */
.online-banner{
  background:linear-gradient(120deg, var(--navy) 0%, var(--ink) 100%); color:var(--white);
  border-radius:var(--radius); padding:44px; display:grid; grid-template-columns:1.1fr 1fr; gap:40px; align-items:center;
  border:1px solid rgba(201,162,39,0.25);
}
@media(max-width:820px){.online-banner{grid-template-columns:1fr;}}
.online-banner h3{color:var(--white); font-size:26px;}
.online-list{margin-top:18px; display:flex; flex-direction:column; gap:14px;}
.online-list .item{display:flex; gap:12px; align-items:flex-start;}
.online-list .ico{
  width:30px; height:30px; border:1px solid var(--gold); border-radius:50%; flex:0 0 30px;
  display:flex; align-items:center; justify-content:center; color:var(--gold); font-family:var(--font-mono); font-size:13px;
}
.online-list b{color:var(--white); font-size:15px; display:block;}
.online-list span{color:#AEB8CB; font-size:13.5px;}

/* ---------- Steps / curriculum ---------- */
.steps{border-left:2px solid var(--line); margin-left:10px;}
.step{position:relative; padding:0 0 40px 34px;}
.step::before{
  content:attr(data-n); position:absolute; left:-11px; top:0; width:22px; height:22px; border-radius:50%;
  background:var(--navy); color:var(--gold-soft); font-family:var(--font-mono); font-size:11px; font-weight:700;
  display:flex; align-items:center; justify-content:center;
}
.step h4{font-size:17px;}
.step p{color:var(--slate); font-size:14.5px; margin-top:6px; max-width:560px;}
.step .meta{font-family:var(--font-mono); font-size:12px; color:var(--gold); margin-bottom:6px; letter-spacing:.04em;}

/* ---------- Table ---------- */
table.data{width:100%; border-collapse:collapse; font-size:14.5px;}
table.data th{
  text-align:left; font-family:var(--font-mono); font-size:11.5px; letter-spacing:.05em; text-transform:uppercase;
  color:var(--slate); border-bottom:2px solid var(--navy); padding:10px 12px;
}
table.data td{padding:12px; border-bottom:1px solid var(--line);}
table.data tr:hover td{background:var(--paper-dim);}
.badge{display:inline-block; font-family:var(--font-mono); font-size:11px; padding:3px 9px; border-radius:100px; font-weight:600;}
.badge-green{background:#E5F1E9; color:var(--green);}
.badge-gold{background:#F8EFD1; color:#8A6D0E;}
.badge-navy{background:#E3E8F0; color:var(--navy);}

/* ---------- Location cards ---------- */
.loc-card{background:var(--white); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;}
.loc-card .head{background:var(--navy); color:var(--white); padding:20px 24px;}
.loc-card .head .name{font-family:var(--font-display); font-size:20px;}
.loc-card .head .sub{font-family:var(--font-mono); font-size:12px; color:var(--gold-soft); margin-top:4px;}
.loc-card .body{padding:22px 24px;}
.loc-card .body .row{display:flex; justify-content:space-between; padding:9px 0; border-bottom:1px dashed var(--line); font-size:14px;}
.loc-card .body .row span:first-child{color:var(--slate);}
.loc-card .naver{
  display:flex; align-items:center; justify-content:center; gap:8px; margin-top:16px; padding:12px;
  background:#03C75A; color:white; font-weight:700; border-radius:var(--radius); font-size:14px;
}
.loc-card .naver:hover{background:#02A34C;}

/* ---------- Review ---------- */
.review-card{background:var(--white); border:1px solid var(--line); padding:24px; border-radius:var(--radius);}
.review-card .stars{color:var(--gold); font-size:14px; letter-spacing:2px;}
.review-card .who{font-family:var(--font-mono); font-size:12px; color:var(--slate); margin-top:12px;}
.review-card p{margin-top:12px; font-size:14.5px; color:var(--ink);}
.review-notice{
  background:var(--paper-dim); border:1px dashed var(--slate-light); border-radius:var(--radius);
  padding:16px 20px; font-size:13px; color:var(--slate); margin-bottom:28px;
}

/* ---------- FAQ ---------- */
details.faq{border-bottom:1px solid var(--line); padding:18px 0;}
details.faq summary{cursor:pointer; font-weight:600; font-size:15.5px; color:var(--navy); list-style:none; display:flex; justify-content:space-between;}
details.faq summary::-webkit-details-marker{display:none;}
details.faq summary::after{content:"+"; color:var(--gold); font-size:20px; font-family:var(--font-mono);}
details.faq[open] summary::after{content:"–";}
details.faq p{color:var(--slate); margin-top:12px; font-size:14.5px; max-width:700px;}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--ink); color:#B9C2D6; padding:60px 0 0;}
.footer-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.08);}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-grid h5{color:var(--white); font-family:var(--font-mono); font-size:12.5px; letter-spacing:.06em; text-transform:uppercase; margin-bottom:16px;}
.footer-grid li{margin-bottom:9px; font-size:14px;}
.footer-grid a:hover{color:var(--gold-soft);}
.footer-brand{font-family:var(--font-display); color:var(--white); font-size:20px; margin-bottom:12px;}
.footer-bottom{display:flex; justify-content:space-between; padding:22px 0; font-size:12.5px; color:var(--slate-light); flex-wrap:wrap; gap:10px;}

/* ---------- Mock test widget ---------- */
.mt-shell{background:var(--white); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow);}
.mt-top{background:var(--navy); color:var(--white); padding:16px 22px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px;}
.mt-top .mono{color:var(--gold-soft); font-size:13px;}
.mt-body{padding:30px;}
.mt-q{font-size:17px; margin-bottom:20px; line-height:1.6;}
.mt-opts{display:flex; flex-direction:column; gap:10px;}
.mt-opt{
  border:1px solid var(--line); padding:14px 16px; border-radius:var(--radius); cursor:pointer; font-size:14.5px; transition:.15s;
  display:flex; gap:10px;
}
.mt-opt:hover{border-color:var(--gold);}
.mt-opt.correct{background:#E5F1E9; border-color:var(--green);}
.mt-opt.wrong{background:#FBE7E7; border-color:#B23A3A;}
.mt-opt .k{font-family:var(--font-mono); font-weight:700; color:var(--slate);}
.mt-explain{margin-top:18px; background:var(--paper-dim); padding:16px 18px; border-radius:var(--radius); font-size:14px; color:var(--ink); display:none;}
.mt-explain.show{display:block;}
.mt-foot{display:flex; justify-content:space-between; align-items:center; padding:18px 30px; border-top:1px solid var(--line);}
.mt-progress{height:5px; background:var(--line); border-radius:100px; overflow:hidden; flex:1; margin:0 20px;}
.mt-progress > div{height:100%; background:var(--gold); width:0%; transition:.3s;}

/* small helpers */
.center{text-align:center;}
.mt-24{margin-top:24px;}
.mt-40{margin-top:40px;}
.text-slate{color:var(--slate);}
.small{font-size:13px;}