/* ============================================================
   TopEduPrep — Design System
   Navy / Gold academic identity · Playfair Display + DM Sans + JetBrains Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,600;0,700;0,800;1,600&family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  /* palette */
  --navy-950:#081226;
  --navy-900:#0B1D3A;
  --navy-800:#122A4E;
  --navy-700:#1B3A66;
  --navy-600:#2A4F82;
  --gold-600:#B8862F;
  --gold-500:#C9A24B;
  --gold-400:#D9BB6E;
  --gold-100:#F3E7C8;
  --paper:#FAF6EC;
  --paper-dim:#F1EBDB;
  --ink:#1B2130;
  --ink-soft:#4A5266;
  --ink-faint:#8A8F9E;
  --line:#E4DCC6;
  --white:#FFFFFF;
  --ok:#3E7A4E;

  /* type */
  --f-display:'Playfair Display', 'Noto Serif KR', serif;
  --f-body:'DM Sans','Pretendard','Noto Sans KR',sans-serif;
  --f-mono:'JetBrains Mono', monospace;

  --radius-s:6px;
  --radius-m:14px;
  --radius-l:24px;
  --shadow-card:0 1px 2px rgba(11,29,58,.04), 0 10px 30px -12px rgba(11,29,58,.18);
  --shadow-lift:0 18px 44px -16px rgba(11,29,58,.32);
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--f-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--f-display);margin:0;color:var(--navy-900);line-height:1.15;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--gold-600);outline-offset:3px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px;}
.eyebrow{
  font-family:var(--f-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--gold-600); font-weight:600; display:inline-flex; align-items:center; gap:8px;
}
.eyebrow::before{content:'';width:18px;height:1px;background:var(--gold-600);display:inline-block;}

/* ---------- top bar ---------- */
.topbar{
  background:var(--navy-950); color:var(--gold-100); font-family:var(--f-mono); font-size:12px;
  padding:7px 0;
}
.topbar .wrap{display:flex; justify-content:space-between; align-items:center; gap:12px; flex-wrap:wrap;}
.topbar a{opacity:.92;}
.topbar a:hover{color:var(--gold-400);}
.topbar-links{display:flex; gap:18px; flex-wrap:wrap;}

/* ---------- nav ---------- */
.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(250,246,236,.92); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex; align-items:center; justify-content:space-between; height:76px;}
.brand{display:flex; align-items:center; gap:10px;}
.brand-mark{
  width:38px;height:38px;border-radius:9px;
  background:linear-gradient(155deg,var(--navy-800),var(--navy-950));
  display:flex;align-items:center;justify-content:center;
  color:var(--gold-400); font-family:var(--f-display); font-weight:700; font-size:17px;
  border:1px solid var(--gold-600);
}
.brand-text{display:flex; flex-direction:column; line-height:1.1;}
.brand-text strong{font-family:var(--f-display); font-size:19px; color:var(--navy-900); font-weight:700; letter-spacing:.01em;}
.brand-text span{font-family:var(--f-mono); font-size:10px; letter-spacing:.1em; color:var(--ink-faint); text-transform:uppercase;}

.nav-links{display:flex; gap:2px; align-items:center;}
.nav-links a{
  padding:10px 14px; font-size:14.5px; font-weight:500; color:var(--ink-soft); border-radius:999px;
  transition:background .15s, color .15s;
}
.nav-links a:hover{background:var(--paper-dim); color:var(--navy-900);}
.nav-links a.active{color:var(--navy-900); font-weight:700;}
.nav-cta{
  display:inline-flex; align-items:center; gap:8px; background:var(--navy-900); color:var(--gold-100)!important;
  padding:11px 20px; border-radius:999px; font-weight:600!important; font-size:14px!important; white-space:nowrap;
  box-shadow:var(--shadow-card); transition:transform .15s, background .15s;
}
.nav-cta:hover{background:var(--navy-800); transform:translateY(-1px);}
.nav-toggle{display:none; background:none; border:0; width:40px; height:40px; position:relative;}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:''; position:absolute; left:9px; width:22px; height:2px; background:var(--navy-900); transition:.2s;
}
.nav-toggle span{top:19px;}
.nav-toggle span::before{top:-7px;}
.nav-toggle span::after{top:7px;}
.nav-toggle.open span{background:transparent;}
.nav-toggle.open span::before{transform:rotate(45deg); top:0;}
.nav-toggle.open span::after{transform:rotate(-45deg); top:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 26px; border-radius:999px; font-weight:700; font-size:15px; border:1px solid transparent;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn-gold{background:var(--gold-500); color:var(--navy-950); box-shadow:0 10px 24px -10px rgba(201,162,75,.7);}
.btn-gold:hover{transform:translateY(-2px); box-shadow:0 16px 30px -10px rgba(201,162,75,.8);}
.btn-outline{background:transparent; border-color:rgba(250,246,236,.35); color:var(--paper);}
.btn-outline:hover{background:rgba(250,246,236,.1);}
.btn-navy{background:var(--navy-900); color:var(--paper);}
.btn-navy:hover{background:var(--navy-800); transform:translateY(-2px);}
.btn-ghost{background:var(--paper-dim); color:var(--navy-900);}
.btn-ghost:hover{background:var(--line);}
.btn-sm{padding:9px 18px; font-size:13.5px;}

/* ---------- hero ---------- */
.hero{
  background:radial-gradient(1100px 500px at 78% -10%, #16345c 0%, var(--navy-900) 46%, var(--navy-950) 100%);
  color:var(--paper); padding:64px 0 84px; position:relative; overflow:hidden;
}
.hero::before{
  content:''; position:absolute; inset:0; opacity:.5; pointer-events:none;
  background-image:radial-gradient(rgba(201,162,75,.16) 1px, transparent 1px);
  background-size:26px 26px; mask-image:linear-gradient(to bottom, black, transparent 75%);
}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; position:relative;}
.hero h1{
  color:var(--paper); font-size:clamp(32px,4vw,52px); font-weight:700; margin:16px 0 20px; letter-spacing:-.01em;
}
.hero h1 em{font-style:italic; color:var(--gold-400);}
.hero p.lead{color:#CBD5E8; font-size:17.5px; max-width:52ch; margin-bottom:30px;}
.hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-bottom:34px;}
.hero-campuses{display:flex; gap:22px; flex-wrap:wrap;}
.hero-campuses div{font-family:var(--f-mono); font-size:12.5px; color:#AAB9D6;}
.hero-campuses strong{display:block; color:var(--gold-400); font-family:var(--f-body); font-size:14px; font-weight:700; margin-bottom:2px;}

/* dashboard mockup — signature element */
.dash{
  background:linear-gradient(180deg,#0F2545,#0B1D3A); border:1px solid rgba(201,162,75,.28);
  border-radius:var(--radius-l); padding:22px; box-shadow:var(--shadow-lift); position:relative;
}
.dash-top{display:flex; justify-content:space-between; align-items:center; margin-bottom:16px;}
.dash-top .dots{display:flex; gap:6px;}
.dash-top .dots span{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.18);}
.dash-title{font-family:var(--f-mono); font-size:11.5px; color:#8FA3C7; letter-spacing:.08em;}
.dash-row{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:12px;}
.dash-card{background:rgba(255,255,255,.045); border:1px solid rgba(255,255,255,.08); border-radius:12px; padding:14px;}
.dash-card .k{font-family:var(--f-mono); font-size:10.5px; color:#93A6C7; text-transform:uppercase; letter-spacing:.08em;}
.dash-card .v{font-family:var(--f-display); font-size:26px; color:var(--paper); font-weight:700; margin-top:4px;}
.dash-card .v small{font-family:var(--f-body); font-size:13px; color:var(--gold-400); font-weight:600;}
.dash-list{display:flex; flex-direction:column; gap:9px;}
.dash-item{display:flex; align-items:center; justify-content:space-between; background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.06); border-radius:10px; padding:10px 13px;}
.dash-item .l{display:flex; align-items:center; gap:9px; font-size:13px; color:#E4E9F5;}
.dash-tag{font-family:var(--f-mono); font-size:10.5px; padding:3px 8px; border-radius:999px;}
.tag-done{background:rgba(62,122,78,.22); color:#7FD79A;}
.tag-pending{background:rgba(201,162,75,.2); color:var(--gold-400);}
.tag-check{background:rgba(255,255,255,.08); color:#B9C4DA;}

/* ---------- sections ---------- */
section{padding:88px 0;}
.section-head{max-width:660px; margin:0 auto 48px;}
.section-head.center{text-align:center; margin-left:auto; margin-right:auto;}
.section-head h2{font-size:clamp(26px,3vw,38px); margin:14px 0 12px;}
.section-head p{color:var(--ink-soft); font-size:16px;}
.bg-alt{background:var(--paper-dim);}
.bg-navy{background:var(--navy-900); color:var(--paper);}
.bg-navy h2{color:var(--paper);}
.bg-navy .section-head p{color:#B9C4DA;}

/* strength cards */
.grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:20px;}
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:24px;}
.card{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius-m); padding:28px 24px;
  box-shadow:var(--shadow-card); transition:transform .18s, box-shadow .18s;
}
.card:hover{transform:translateY(-4px); box-shadow:var(--shadow-lift);}
.card .num{font-family:var(--f-mono); color:var(--gold-600); font-size:13px; font-weight:700; letter-spacing:.06em;}
.card h3{font-size:19px; margin:12px 0 8px;}
.card p{color:var(--ink-soft); font-size:14.5px;}
.icon-badge{
  width:46px;height:46px;border-radius:12px; background:var(--navy-900); color:var(--gold-400);
  display:flex; align-items:center; justify-content:center; margin-bottom:14px; font-size:20px;
}

/* stat strip */
.stats{display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid rgba(201,162,75,.25); border-bottom:1px solid rgba(201,162,75,.25);}
.stats div{padding:26px 20px; text-align:center; border-right:1px solid rgba(201,162,75,.16);}
.stats div:last-child{border-right:none;}
.stats .v{font-family:var(--f-display); font-size:clamp(24px,3vw,34px); color:var(--gold-400); font-weight:700;}
.stats .k{font-family:var(--f-mono); font-size:11.5px; color:#9FB0CE; letter-spacing:.06em; margin-top:4px;}

/* campus cards */
.campus-card{background:var(--white); border:1px solid var(--line); border-radius:var(--radius-l); overflow:hidden; box-shadow:var(--shadow-card);}
.campus-media{height:150px; background:linear-gradient(135deg,var(--navy-800),var(--navy-950)); position:relative; display:flex; align-items:flex-end; padding:18px;}
.campus-media span{font-family:var(--f-mono); color:var(--gold-400); font-size:12px; letter-spacing:.08em; text-transform:uppercase;}
.campus-body{padding:22px 24px 26px;}
.campus-body h3{font-size:21px; margin-bottom:6px;}
.campus-meta{display:flex; flex-direction:column; gap:6px; margin:14px 0 18px; font-size:13.5px; color:var(--ink-soft);}
.campus-meta div{display:flex; gap:8px;}
.pill-row{display:flex; gap:6px; flex-wrap:wrap; margin-bottom:16px;}
.pill{font-family:var(--f-mono); font-size:11px; background:var(--paper-dim); color:var(--navy-800); padding:5px 10px; border-radius:999px; border:1px solid var(--line);}

/* table */
.tbl{width:100%; border-collapse:collapse; background:var(--white); border-radius:var(--radius-m); overflow:hidden; box-shadow:var(--shadow-card);}
.tbl th,.tbl td{padding:14px 18px; text-align:left; font-size:14.5px; border-bottom:1px solid var(--line);}
.tbl thead th{background:var(--navy-900); color:var(--gold-100); font-family:var(--f-mono); font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; font-weight:600;}
.tbl tbody tr:hover{background:var(--paper-dim);}
.tbl tbody tr:last-child td{border-bottom:none;}

/* testimonial */
.quote-card{background:var(--white); border:1px solid var(--line); border-radius:var(--radius-m); padding:26px; box-shadow:var(--shadow-card);}
.quote-card .stars{color:var(--gold-500); font-size:14px; letter-spacing:2px; margin-bottom:12px;}
.quote-card p.body{font-size:15px; color:var(--ink); margin-bottom:18px; min-height:96px;}
.quote-who{display:flex; align-items:center; gap:10px; padding-top:14px; border-top:1px dashed var(--line);}
.avatar-blur{width:38px;height:38px;border-radius:50%; background:linear-gradient(135deg,var(--navy-700),var(--navy-950)); display:flex; align-items:center; justify-content:center; color:var(--gold-400); font-family:var(--f-mono); font-size:12px; font-weight:700;}
.quote-who .name{font-size:13.5px; font-weight:700; color:var(--navy-900);}
.quote-who .meta{font-size:12px; color:var(--ink-faint); font-family:var(--f-mono);}

/* countdown */
.countdown-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:14px;}
.cd-box{background:var(--navy-900); border-radius:var(--radius-m); padding:20px 10px; text-align:center; color:var(--paper); border:1px solid rgba(201,162,75,.3);}
.cd-box .num{font-family:var(--f-mono); font-size:clamp(24px,3vw,34px); color:var(--gold-400); font-weight:700;}
.cd-box .lab{font-family:var(--f-mono); font-size:10.5px; letter-spacing:.08em; text-transform:uppercase; color:#9FB0CE; margin-top:2px;}

/* mock test */
.test-shell{background:var(--white); border:1px solid var(--line); border-radius:var(--radius-l); box-shadow:var(--shadow-card); overflow:hidden;}
.test-head{background:var(--navy-900); color:var(--paper); padding:20px 26px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px;}
.test-head .prog{font-family:var(--f-mono); font-size:12.5px; color:var(--gold-400);}
.progress-bar{height:5px; background:var(--paper-dim);}
.progress-fill{height:100%; background:var(--gold-500); width:0%; transition:width .3s;}
.test-body{padding:32px 30px;}
.q-tag{font-family:var(--f-mono); font-size:11.5px; color:var(--gold-600); text-transform:uppercase; letter-spacing:.06em;}
.q-text{font-size:19px; margin:12px 0 24px; color:var(--navy-900); font-weight:600; line-height:1.5;}
.opt{
  display:flex; align-items:flex-start; gap:12px; padding:14px 16px; border:1.5px solid var(--line); border-radius:12px;
  margin-bottom:10px; cursor:pointer; transition:.15s; font-size:15px;
}
.opt:hover{border-color:var(--gold-500); background:#FDFAF0;}
.opt.selected{border-color:var(--navy-900); background:var(--paper-dim); font-weight:600;}
.opt .letter{
  width:26px;height:26px;border-radius:50%; border:1.5px solid var(--line); display:flex; align-items:center; justify-content:center;
  font-family:var(--f-mono); font-size:12.5px; flex:none; color:var(--ink-soft);
}
.opt.selected .letter{background:var(--navy-900); color:var(--gold-400); border-color:var(--navy-900);}
.opt.correct{border-color:var(--ok); background:#F1F8F3;}
.opt.wrong{border-color:#C1503F; background:#FBF1EF;}
.test-nav{display:flex; justify-content:space-between; align-items:center; padding:18px 30px; border-top:1px solid var(--line);}
.tab-row{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:26px;}
.tab-btn{padding:10px 18px; border-radius:999px; border:1.5px solid var(--line); background:var(--white); font-weight:600; font-size:13.5px; color:var(--ink-soft);}
.tab-btn.active{background:var(--navy-900); color:var(--gold-400); border-color:var(--navy-900);}
.result-score{text-align:center; padding:20px 0 6px;}
.result-score .big{font-family:var(--f-display); font-size:64px; color:var(--navy-900); font-weight:800;}
.result-score .big small{font-size:24px; color:var(--ink-faint); font-weight:500;}

/* forms */
.form-field{margin-bottom:18px;}
.form-field label{display:block; font-size:13.5px; font-weight:600; color:var(--navy-900); margin-bottom:7px;}
.form-field input, .form-field select, .form-field textarea{
  width:100%; padding:13px 15px; border:1.5px solid var(--line); border-radius:10px; font-family:var(--f-body); font-size:14.5px; background:var(--white);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus{border-color:var(--gold-600);}

/* contact channels */
.chan-card{display:flex; align-items:center; gap:16px; background:var(--white); border:1px solid var(--line); border-radius:var(--radius-m); padding:20px 22px; box-shadow:var(--shadow-card);}
.chan-ico{width:48px;height:48px;border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:20px; flex:none;}

/* blog */
.post-card{background:var(--white); border:1px solid var(--line); border-radius:var(--radius-m); overflow:hidden; box-shadow:var(--shadow-card); display:flex; flex-direction:column;}
.post-thumb{height:130px; background:linear-gradient(135deg,var(--navy-800),var(--navy-950)); display:flex; align-items:center; padding:18px;}
.post-thumb span{font-family:var(--f-mono); color:var(--gold-400); font-size:11px; letter-spacing:.06em;}
.post-body{padding:20px 22px 24px; display:flex; flex-direction:column; gap:10px; flex:1;}
.post-body h3{font-size:17px; line-height:1.4;}
.post-body p{font-size:13.5px; color:var(--ink-soft);}
.post-meta{font-family:var(--f-mono); font-size:11px; color:var(--ink-faint); margin-top:auto;}
.article-body{max-width:720px; margin:0 auto; font-size:16.5px; color:var(--ink);}
.article-body h2{font-size:24px; margin:36px 0 14px;}
.article-body h3{font-size:19px; margin:26px 0 10px;}
.article-body p{margin-bottom:16px; color:var(--ink);}
.article-body ul{margin-bottom:16px;}
.article-body li{margin-bottom:8px; padding-left:22px; position:relative;}
.article-body li::before{content:'—'; position:absolute; left:0; color:var(--gold-600);}

/* footer */
footer{background:var(--navy-950); color:#AEB9D0; padding:64px 0 28px;}
.foot-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px;}
.foot-brand strong{font-family:var(--f-display); color:var(--paper); font-size:20px;}
.foot-brand p{margin-top:12px; font-size:13.5px; color:#8A96B2; max-width:34ch;}
footer h4{color:var(--gold-400); font-family:var(--f-mono); font-size:12px; letter-spacing:.08em; text-transform:uppercase; margin-bottom:16px;}
footer ul li{margin-bottom:10px; font-size:14px;}
footer ul li a:hover{color:var(--gold-400);}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08); padding-top:24px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-size:12.5px; color:#7B8AA8; font-family:var(--f-mono);}

/* breadcrumb / page hero small */
.page-hero{background:var(--navy-900); color:var(--paper); padding:52px 0 42px;}
.page-hero h1{color:var(--paper); font-size:clamp(28px,3.4vw,42px); margin:12px 0 10px;}
.page-hero p{color:#B9C4DA; max-width:60ch; font-size:15.5px;}
.crumb{font-family:var(--f-mono); font-size:12px; color:#8FA3C7;}
.crumb a:hover{color:var(--gold-400);}

/* utility */
.mt-0{margin-top:0;}
.center{text-align:center;}
.mx-auto{margin-left:auto;margin-right:auto;}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:1fr 1fr;}
  .hero-grid{grid-template-columns:1fr;}
  .dash{max-width:520px;}
  .foot-grid{grid-template-columns:1fr 1fr;}
  .stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:760px){
  .nav-links{
    position:fixed; inset:76px 0 0 0; background:var(--paper); flex-direction:column; align-items:stretch;
    padding:18px; gap:4px; transform:translateY(-8px); opacity:0; pointer-events:none; transition:.2s; overflow:auto;
  }
  .nav-links.open{opacity:1; transform:translateY(0); pointer-events:auto;}
  .nav-links a{padding:14px 16px; font-size:16px; border-bottom:1px solid var(--line); border-radius:0;}
  .nav-cta{width:100%; justify-content:center; margin-top:8px;}
  .nav-toggle{display:block;}
  .grid-4, .grid-3, .grid-2, .countdown-strip{grid-template-columns:1fr 1fr;}
  .foot-grid{grid-template-columns:1fr;}
  section{padding:60px 0;}
  .stats{grid-template-columns:1fr 1fr;}
  .test-body{padding:24px 18px;}
}
@media (max-width:520px){
  .grid-4,.grid-3,.grid-2,.countdown-strip{grid-template-columns:1fr;}
  .hero{padding:40px 0 60px;}
  .stats{grid-template-columns:1fr;}
  .stats div{border-right:none; border-bottom:1px solid rgba(201,162,75,.16);}
}