/* ==========================================================================
   TOP EDU PREP — Design System
   Concept: the "성적표(Report Card)" motif — a hybrid online/offline academy
   that proves itself through visible, trackable progress. Every section
   borrows the visual grammar of a score report: rules, tick marks, seals,
   rising indicators, D-day counters.
   ========================================================================== */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600;8..60,700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* --- color tokens --- */
  --navy:        #122642;
  --navy-2:      #1C3A63;
  --navy-3:      #0B1A2E;
  --paper:       #FBF8F1;
  --paper-2:     #F2ECDC;
  --ink:         #1A1D22;
  --slate:       #52627D;
  --slate-soft:  #8592A6;
  --gold:        #C6952E;
  --gold-light:  #E3BE6F;
  --green:       #2E7D5B;
  --red:         #B14A33;
  --line:        #DED5BE;
  --line-dark:   rgba(251,248,241,0.16);
  --white:       #ffffff;

  --font-display: 'Source Serif 4', 'Noto Serif KR', serif;
  --font-body:    'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', sans-serif;
  --font-mono:    'IBM Plex Mono', 'Pretendard', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 22px;
  --shadow-card: 0 1px 2px rgba(18,38,66,0.06), 0 12px 32px -16px rgba(18,38,66,0.18);
  --shadow-lift: 0 24px 60px -24px rgba(18,38,66,0.35);
  --maxw: 1180px;
}

@media (prefers-color-scheme: dark){ /* keep brand consistent; no forced dark mode */ }

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.62;
  font-size:16px;
}
img,svg{ 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(--font-display); margin:0; line-height:1.22; letter-spacing:-0.01em; color:var(--navy-3); }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

:focus-visible{ outline:3px solid var(--gold); outline-offset:3px; border-radius:4px; }

.container{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.section{ padding:88px 0; }
.section--tight{ padding:56px 0; }
.section--alt{ background:var(--paper-2); }
.section--navy{ background:var(--navy-3); color:var(--paper); }
.section--navy h2,.section--navy h3{ color:var(--paper); }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--gold); font-weight:600; margin-bottom:14px;
}
.eyebrow::before{ content:''; width:18px; height:1px; background:var(--gold); }

.section-head{ max-width:640px; margin-bottom:48px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head h2{ font-size:clamp(28px,3.6vw,40px); }
.section-head p{ margin-top:14px; color:var(--slate); font-size:16.5px; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; justify-content:center;
  padding:14px 26px; border-radius:999px; font-weight:600; font-size:15px;
  border:1px solid transparent; transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-2px); }
.btn-gold{ background:var(--gold); color:var(--navy-3); box-shadow:0 10px 24px -10px rgba(198,149,46,0.7); }
.btn-gold:hover{ background:var(--gold-light); }
.btn-navy{ background:var(--navy); color:var(--paper); }
.btn-navy:hover{ background:var(--navy-2); }
.btn-outline{ background:transparent; border-color:var(--line); color:var(--navy); }
.btn-outline:hover{ border-color:var(--navy); }
.btn-outline-light{ background:transparent; border-color:var(--line-dark); color:var(--paper); }
.btn-outline-light:hover{ border-color:var(--gold); color:var(--gold-light); }
.btn-sm{ padding:10px 18px; font-size:13.5px; }
.btn-block{ width:100%; }

/* ---------- header / nav ---------- */
.topbar{
  background:var(--navy-3); color:var(--paper-2); font-family:var(--font-mono); font-size:12.5px;
}
.topbar .container{ display:flex; justify-content:space-between; align-items:center; height:36px; gap:12px; overflow:hidden; }
.topbar-links{ display:flex; gap:18px; }
.topbar-links a:hover{ color:var(--gold-light); }
.topbar-ddays{ display:flex; gap:16px; color:var(--gold-light); white-space:nowrap; }

.site-header{
  position:sticky; top:0; z-index:60; background:rgba(251,248,241,0.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; height:76px; gap:24px; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:600; font-size:20px; color:var(--navy-3); }
.brand-seal{ width:38px; height:38px; flex:none; }
.brand small{ display:block; font-family:var(--font-mono); font-size:10px; letter-spacing:.12em; color:var(--gold); font-weight:600; text-transform:uppercase; }

.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-links a{
  padding:10px 14px; border-radius:999px; font-size:14.5px; font-weight:500; color:var(--slate);
  transition:background .16s ease,color .16s ease;
}
.nav-links a:hover, .nav-links a.active{ background:var(--navy); color:var(--paper); }
.nav-cta{ display:flex; align-items:center; gap:10px; }
.nav-toggle{ display:none; background:none; border:1px solid var(--line); border-radius:10px; width:44px; height:44px; align-items:center; justify-content:center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:''; display:block; width:20px; height:2px; background:var(--navy); position:relative; transition:.2s;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

/* ---------- footer ---------- */
.site-footer{ background:var(--navy-3); color:var(--paper-2); padding:64px 0 28px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px; }
.footer-grid h4{ color:var(--paper); font-size:14px; letter-spacing:.06em; text-transform:uppercase; font-family:var(--font-mono); margin-bottom:16px; }
.footer-grid a, .footer-grid p{ color:var(--paper-2); font-size:14.5px; opacity:.82; }
.footer-grid li{ margin-bottom:10px; }
.footer-grid a:hover{ opacity:1; color:var(--gold-light); }
.footer-bottom{ margin-top:48px; padding-top:24px; border-top:1px solid var(--line-dark); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:12.5px; color:var(--slate-soft); font-family:var(--font-mono); }
.footer-brand-desc{ margin-top:12px; max-width:320px; font-size:14px; color:var(--slate-soft); }

/* ---------- breadcrumb / page hero ---------- */
.page-hero{ background:linear-gradient(180deg,var(--navy-3),var(--navy)); color:var(--paper); padding:64px 0 56px; }
.breadcrumb{ font-family:var(--font-mono); font-size:12.5px; color:var(--gold-light); opacity:.9; margin-bottom:16px; }
.breadcrumb a{ opacity:.75; }
.breadcrumb a:hover{ opacity:1; }
.page-hero h1{ color:var(--paper); font-size:clamp(30px,4vw,46px); max-width:760px; }
.page-hero p{ color:var(--paper-2); opacity:.85; margin-top:14px; max-width:620px; font-size:16.5px; }

/* ---------- hero (home) ---------- */
.hero{ background:radial-gradient(1200px 600px at 78% -10%, rgba(198,149,46,0.16), transparent), linear-gradient(180deg,var(--navy-3),var(--navy) 70%); color:var(--paper); padding:64px 0 0; overflow:hidden; }
.hero-grid{ display:grid; grid-template-columns:1.05fr 0.95fr; gap:40px; align-items:center; padding-bottom:60px; }
.hero h1{ color:var(--paper); font-size:clamp(34px,4.6vw,54px); }
.hero-highlight{ color:var(--gold-light); }
.hero p.lead{ color:var(--paper-2); opacity:.88; font-size:18px; margin-top:20px; max-width:520px; }
.hero-ctas{ display:flex; gap:14px; margin-top:30px; flex-wrap:wrap; }
.hero-stats{ display:flex; gap:28px; margin-top:44px; flex-wrap:wrap; }
.hero-stat b{ display:block; font-family:var(--font-display); font-size:28px; color:var(--gold-light); }
.hero-stat span{ font-size:13px; color:var(--slate-soft); }

/* ---------- report card widget (signature element) ---------- */
.report-card{
  background:var(--paper); color:var(--ink); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lift); padding:26px 26px 22px; position:relative;
  border:1px solid rgba(255,255,255,0.5);
}
.report-card::before{
  content:'TOP EDU PREP · OFFICIAL PROGRESS REPORT';
  position:absolute; top:-13px; left:26px; background:var(--gold); color:var(--navy-3);
  font-family:var(--font-mono); font-size:10px; letter-spacing:.1em; padding:4px 12px; border-radius:999px; font-weight:700;
}
.report-head{ display:flex; justify-content:space-between; align-items:flex-start; padding-top:6px; border-bottom:1px dashed var(--line); padding-bottom:14px; margin-bottom:16px; }
.report-head h3{ font-size:18px; }
.report-head span{ font-family:var(--font-mono); font-size:12px; color:var(--slate); }
.report-row{ display:flex; align-items:center; justify-content:space-between; gap:14px; padding:9px 0; border-bottom:1px solid var(--line); }
.report-row:last-of-type{ border-bottom:none; }
.report-subject{ display:flex; align-items:center; gap:10px; font-size:14.5px; font-weight:600; }
.report-dot{ width:8px; height:8px; border-radius:50%; }
.report-bar{ flex:1; height:7px; background:var(--paper-2); border-radius:99px; overflow:hidden; margin:0 12px; }
.report-bar i{ display:block; height:100%; border-radius:99px; background:linear-gradient(90deg,var(--gold),var(--gold-light)); }
.report-score{ font-family:var(--font-mono); font-size:13.5px; font-weight:600; color:var(--green); }
.report-foot{ display:flex; justify-content:space-between; align-items:center; margin-top:18px; padding-top:14px; border-top:1px dashed var(--line); }
.report-foot .tag{ font-family:var(--font-mono); font-size:11.5px; background:var(--paper-2); color:var(--slate); padding:5px 10px; border-radius:6px; }
.report-check{ display:flex; gap:6px; }
.report-check i{ width:20px; height:20px; border-radius:5px; background:var(--green); display:flex; align-items:center; justify-content:center; }

/* ---------- pillars / feature cards ---------- */
.grid{ display:grid; gap:26px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }

.pillar{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:30px 26px; box-shadow:var(--shadow-card); position:relative; overflow:hidden;
}
.pillar .num{ font-family:var(--font-mono); color:var(--line); font-size:13px; position:absolute; top:22px; right:24px; }
.pillar-icon{ width:46px; height:46px; border-radius:12px; background:var(--navy-3); display:flex; align-items:center; justify-content:center; margin-bottom:18px; }
.pillar h3{ font-size:19px; margin-bottom:10px; }
.pillar p{ color:var(--slate); font-size:15px; }
.pillar ul{ margin-top:14px; display:flex; flex-direction:column; gap:8px; }
.pillar li{ font-size:14px; color:var(--slate); display:flex; gap:8px; }
.pillar li::before{ content:'—'; color:var(--gold); flex:none; }

/* ---------- campus cards ---------- */
.campus-card{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius-md); overflow:hidden;
  box-shadow:var(--shadow-card);
}
.campus-map{ height:150px; background:linear-gradient(135deg,var(--navy),var(--navy-2)); position:relative; }
.campus-map svg{ position:absolute; inset:0; width:100%; height:100%; }
.campus-body{ padding:24px 24px 26px; }
.campus-badge{ display:inline-block; font-family:var(--font-mono); font-size:11px; letter-spacing:.08em; color:var(--gold); background:rgba(198,149,46,0.12); padding:4px 10px; border-radius:6px; margin-bottom:10px; }
.campus-body h3{ font-size:19px; margin-bottom:6px; }
.campus-body .addr{ color:var(--slate); font-size:14px; margin-bottom:14px; }
.campus-meta{ display:flex; flex-direction:column; gap:8px; font-size:13.5px; color:var(--slate); margin-bottom:16px; }
.campus-meta b{ color:var(--ink); font-weight:600; }

/* ---------- track / curriculum tabs ---------- */
.tabs{ display:flex; gap:8px; flex-wrap:wrap; border-bottom:1px solid var(--line); margin-bottom:36px; }
.tab-btn{
  background:none; border:none; padding:12px 6px; margin-right:18px; font-size:15px; font-weight:600; color:var(--slate-soft);
  border-bottom:2px solid transparent; margin-bottom:-1px;
}
.tab-btn.active{ color:var(--navy-3); border-color:var(--gold); }
.tab-panel{ display:none; }
.tab-panel.active{ display:block; animation:fadein .3s ease; }
@keyframes fadein{ from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:none;} }

.course-row{
  display:grid; grid-template-columns:64px 1.5fr 1fr 1fr 100px; gap:16px; align-items:center;
  padding:18px 16px; border-bottom:1px solid var(--line);
}
.course-row.head{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--slate-soft); }
.course-lv{ width:36px; height:36px; border-radius:8px; display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:12px; font-weight:700; color:var(--white); }
.course-name{ font-weight:600; font-size:15px; }
.course-name span{ display:block; font-weight:400; font-size:13px; color:var(--slate); margin-top:2px; }
.course-mode{ font-size:13.5px; color:var(--slate); }
.badge{ display:inline-block; font-family:var(--font-mono); font-size:10.5px; padding:3px 9px; border-radius:5px; font-weight:600; }
.badge-online{ background:rgba(46,125,91,0.12); color:var(--green); }
.badge-offline{ background:rgba(177,74,51,0.1); color:var(--red); }
.badge-hybrid{ background:rgba(198,149,46,0.14); color:#8a6414; }

/* ---------- timeline (process) ---------- */
.process{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; position:relative; }
.process::before{ content:''; position:absolute; top:26px; left:6%; right:6%; height:1px; background:var(--line); }
.process-step{ text-align:center; padding:0 14px; position:relative; }
.process-num{
  width:52px; height:52px; border-radius:50%; background:var(--navy-3); color:var(--gold-light);
  font-family:var(--font-mono); font-weight:700; display:flex; align-items:center; justify-content:center; margin:0 auto 18px;
  position:relative; z-index:2; border:4px solid var(--paper);
}
.process-step h4{ font-size:15.5px; margin-bottom:8px; }
.process-step p{ font-size:13.5px; color:var(--slate); }

/* ---------- exam calendar ---------- */
.exam-table{ width:100%; border-collapse:collapse; }
.exam-table th{ text-align:left; font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.06em; color:var(--slate-soft); padding:12px 14px; border-bottom:2px solid var(--navy-3); }
.exam-table td{ padding:16px 14px; border-bottom:1px solid var(--line); font-size:14.5px; vertical-align:middle; }
.exam-table tr:hover td{ background:rgba(198,149,46,0.05); }
.dday{ font-family:var(--font-mono); font-weight:700; padding:4px 10px; border-radius:6px; font-size:13px; display:inline-block; }
.dday.soon{ background:var(--red); color:var(--white); }
.dday.mid{ background:var(--gold); color:var(--navy-3); }
.dday.far{ background:var(--paper-2); color:var(--slate); }

/* ---------- testimonials ---------- */
.review-card{ background:var(--white); border:1px solid var(--line); border-radius:var(--radius-md); padding:28px; box-shadow:var(--shadow-card); display:flex; flex-direction:column; gap:16px; }
.review-stars{ color:var(--gold); font-size:14px; letter-spacing:2px; }
.review-quote{ font-size:15px; color:var(--ink); line-height:1.7; }
.review-meta{ display:flex; align-items:center; gap:12px; padding-top:14px; border-top:1px dashed var(--line); }
.review-avatar{ width:38px; height:38px; border-radius:50%; background:var(--navy-3); color:var(--gold-light); display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-weight:700; font-size:13px; }
.review-meta b{ font-size:13.5px; display:block; }
.review-meta span{ font-size:12px; color:var(--slate); }
.review-score{ margin-left:auto; font-family:var(--font-mono); font-size:12px; background:var(--paper-2); color:var(--navy); padding:4px 9px; border-radius:6px; }

/* ---------- mock test ---------- */
.mock-shell{ background:var(--white); border:1px solid var(--line); border-radius:var(--radius-lg); box-shadow:var(--shadow-lift); overflow:hidden; }
.mock-topbar{ background:var(--navy-3); color:var(--paper); padding:16px 26px; display:flex; justify-content:space-between; align-items:center; font-family:var(--font-mono); font-size:13px; }
.mock-timer{ color:var(--gold-light); font-weight:700; }
.mock-progress{ height:4px; background:rgba(255,255,255,0.15); }
.mock-progress i{ display:block; height:100%; background:var(--gold); width:0%; transition:width .3s ease; }
.mock-body{ padding:34px 32px; }
.mock-qnum{ font-family:var(--font-mono); font-size:12.5px; color:var(--slate-soft); margin-bottom:10px; }
.mock-question{ font-size:17px; margin-bottom:24px; line-height:1.6; }
.mock-options{ display:flex; flex-direction:column; gap:10px; }
.mock-option{ display:flex; gap:12px; align-items:flex-start; padding:14px 16px; border:1px solid var(--line); border-radius:10px; transition:.15s; }
.mock-option:hover{ border-color:var(--gold); background:rgba(198,149,46,0.05); }
.mock-option input{ margin-top:3px; accent-color:var(--gold); }
.mock-option.correct{ border-color:var(--green); background:rgba(46,125,91,0.08); }
.mock-option.wrong{ border-color:var(--red); background:rgba(177,74,51,0.07); }
.mock-letter{ width:26px; height:26px; border-radius:50%; background:var(--paper-2); display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:12.5px; font-weight:700; flex:none; }
.mock-explain{ margin-top:16px; padding:14px 16px; background:var(--paper-2); border-radius:10px; font-size:13.5px; color:var(--slate); display:none; }
.mock-footer{ display:flex; justify-content:space-between; padding:22px 32px; border-top:1px solid var(--line); background:var(--paper); }
.mock-result{ text-align:center; padding:60px 32px; display:none; }
.mock-result .score-big{ font-family:var(--font-display); font-size:64px; color:var(--navy-3); }
.mock-result .score-big span{ font-size:28px; color:var(--slate-soft); }

/* ---------- CTA band ---------- */
.cta-band{ background:linear-gradient(120deg,var(--navy-3),var(--navy)); color:var(--paper); border-radius:var(--radius-lg); padding:52px 48px; display:flex; justify-content:space-between; align-items:center; gap:30px; flex-wrap:wrap; }
.cta-band h3{ color:var(--paper); font-size:26px; max-width:440px; }
.cta-band p{ color:var(--paper-2); opacity:.85; margin-top:10px; }
.cta-actions{ display:flex; gap:12px; flex-wrap:wrap; }

/* ---------- misc ---------- */
.divider-dashed{ border:none; border-top:1px dashed var(--line); margin:0; }
.chip-row{ display:flex; gap:10px; flex-wrap:wrap; }
.chip{ font-family:var(--font-mono); font-size:12px; padding:6px 12px; border-radius:999px; background:var(--paper-2); color:var(--slate); border:1px solid var(--line); }
.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
.faq-item{ border-bottom:1px solid var(--line); padding:20px 0; }
.faq-q{ display:flex; justify-content:space-between; align-items:center; font-weight:600; font-size:16px; cursor:pointer; }
.faq-q::after{ content:'+'; font-family:var(--font-mono); font-size:20px; color:var(--gold); transition:.2s; }
.faq-item.open .faq-q::after{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .25s ease; color:var(--slate); font-size:14.5px; }
.faq-item.open .faq-a{ max-height:220px; margin-top:12px; }

.sticky-cta{ position:fixed; bottom:20px; right:20px; z-index:70; display:flex; flex-direction:column; gap:10px; }
.sticky-cta a{ width:56px; height:56px; border-radius:50%; display:flex; align-items:center; justify-content:center; box-shadow:var(--shadow-lift); font-size:22px; }
.sticky-kakao{ background:#FEE500; color:#191919; }
.sticky-naver{ background:#03C75A; color:var(--white); font-weight:800; font-family:var(--font-mono); }
.sticky-call{ background:var(--gold); color:var(--navy-3); }

/* ---------- responsive ---------- */
@media (max-width:980px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .hero-grid{ grid-template-columns:1fr; }
  .two-col{ grid-template-columns:1fr; }
  .grid-3, .grid-4{ grid-template-columns:repeat(2,1fr); }
  .process{ grid-template-columns:repeat(2,1fr); row-gap:36px; }
  .process::before{ display:none; }
}
@media (max-width:720px){
  .section{ padding:56px 0; }
  .topbar-links{ display:none; }
  .nav-links{ position:fixed; top:76px; left:0; right:0; background:var(--paper); flex-direction:column; align-items:stretch;
    padding:14px; border-bottom:1px solid var(--line); box-shadow:var(--shadow-card); display:none; }
  .nav-links.open{ display:flex; }
  .nav-links a{ padding:14px; }
  .nav-toggle{ display:flex; }
  .grid-3, .grid-4, .grid-2{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .course-row{ grid-template-columns:1fr; gap:6px; text-align:left; }
  .course-row.head{ display:none; }
  .cta-band{ padding:36px 24px; }
  .exam-table{ font-size:13px; }
  .exam-table th:nth-child(4), .exam-table td:nth-child(4){ display:none; }
  .mock-body{ padding:24px 20px; }
  .process{ grid-template-columns:1fr; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}