/* ==========================================================================
   TopEduPrep — Design System
   Palette: navy / oxblood / gold on warm paper
   Type: Noto Serif KR + Fraunces (display) · Noto Sans KR + Inter (body) · JetBrains Mono (data)
   ========================================================================== */

:root{
  --navy:      #0B1B33;
  --navy-2:    #142A4D;
  --oxblood:   #9A1B2F;
  --oxblood-2: #7A1524;
  --gold:      #C6A15B;
  --gold-soft: #E7D9B8;
  --paper:     #F7F4EC;
  --paper-2:   #EFEAD9;
  --ink:       #181A1F;
  --slate:     #5B6472;
  --line:      #E1DACB;
  --white:     #FFFFFF;

  --font-display-kr: 'Noto Serif KR', serif;
  --font-display-en: 'Fraunces', serif;
  --font-body-kr: 'Noto Sans KR', sans-serif;
  --font-body-en: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1180px;
  --radius: 4px;
  --shadow-card: 0 1px 2px rgba(11,27,51,.06), 0 8px 24px rgba(11,27,51,.06);
  --shadow-lift: 0 20px 60px rgba(11,27,51,.18);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body-en), var(--font-body-kr);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family:var(--font-display-kr); font-weight:700; color:var(--navy); }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }
:focus-visible{ outline:3px solid var(--gold); outline-offset:2px; }
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

.container{ max-width:var(--container); margin:0 auto; padding:0 24px; }
.eyebrow{
  font-family:var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--oxblood); font-weight:600; display:inline-flex; align-items:center; gap:8px;
}
.eyebrow::before{ content:''; width:18px; height:1px; background:var(--oxblood); display:inline-block; }
.section{ padding:88px 0; }
.section--tight{ padding:56px 0; }
.section--navy{ background:var(--navy); color:var(--gold-soft); }
.section--navy h2,.section--navy h3{ color:var(--white); }
.section--paper2{ background:var(--paper-2); }
.section-head{ max-width:640px; margin-bottom:44px; }
.section-head h2{ font-size:clamp(26px,3.4vw,38px); line-height:1.3; margin:10px 0 14px; }
.section-head p{ color:var(--slate); font-size:16.5px; }
.section--navy .section-head p{ color:#C9D2E4; }

/* ---------- Top utility bar ---------- */
.topbar{
  background:var(--navy); color:#C9D2E4; font-size:13px;
}
.topbar .container{ display:flex; align-items:center; justify-content:space-between; height:38px; }
.topbar-locations{ display:flex; gap:18px; font-family:var(--font-mono); letter-spacing:.02em; }
.topbar-locations span b{ color:var(--gold); font-weight:600; }
.topbar-links{ display:flex; gap:16px; }
.topbar-links a{ color:#C9D2E4; }
.topbar-links a:hover{ color:var(--gold); }

/* ---------- Header / nav ---------- */
header.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(247,244,236,.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-kr); font-weight:700; font-size:21px; color:var(--navy); }
.logo small{ display:block; font-family:var(--font-mono); font-size:10px; letter-spacing:.16em; color:var(--oxblood); font-weight:600; }
.logo-mark{
  width:38px; height:38px; border-radius:3px; background:var(--navy);
  color:var(--gold); display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display-en); font-weight:600; font-size:16px; flex:none;
}
nav.main-nav{ display:flex; gap:30px; }
nav.main-nav a{
  font-size:14.5px; font-weight:600; color:var(--navy); position:relative; padding:6px 0;
}
nav.main-nav a.active,nav.main-nav a:hover{ color:var(--oxblood); }
nav.main-nav a.active::after{
  content:''; position:absolute; left:0; right:0; bottom:-2px; height:2px; background:var(--oxblood);
}
.nav-cta{ display:flex; align-items:center; gap:10px; }
.hamburger{ display:none; background:none; border:0; padding:8px; }
.hamburger span{ display:block; width:22px; height:2px; background:var(--navy); margin:5px 0; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 24px; border-radius:3px; font-weight:700; font-size:14.5px;
  border:1px solid transparent; transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--oxblood); color:var(--white); box-shadow:0 6px 18px rgba(154,27,47,.28); }
.btn-primary:hover{ background:var(--oxblood-2); }
.btn-gold{ background:var(--gold); color:var(--navy); box-shadow:0 6px 18px rgba(198,161,91,.3); }
.btn-ghost{ background:transparent; border-color:var(--navy); color:var(--navy); }
.btn-ghost:hover{ background:var(--navy); color:var(--white); }
.btn-ghost-light{ background:transparent; border-color:rgba(255,255,255,.4); color:var(--white); }
.btn-ghost-light:hover{ background:rgba(255,255,255,.12); }
.btn-sm{ padding:9px 16px; font-size:13px; }
.btn-block{ width:100%; }

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  background:radial-gradient(120% 140% at 85% -10%, #1B3660 0%, var(--navy) 55%, #081222 100%);
  color:var(--white); padding:76px 0 0;
}
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:40px; align-items:center; padding-bottom:60px; }
.hero-tag{
  display:inline-flex; align-items:center; gap:8px; padding:7px 14px; border:1px solid rgba(198,161,91,.5);
  border-radius:99px; font-family:var(--font-mono); font-size:12px; letter-spacing:.06em; color:var(--gold);
  margin-bottom:22px;
}
.hero h1{
  color:var(--white); font-size:clamp(34px,4.6vw,56px); line-height:1.22; letter-spacing:-.01em;
}
.hero h1 em{ font-style:normal; color:var(--gold); border-bottom:3px solid var(--oxblood); padding-bottom:2px; }
.hero p.lead{ margin-top:22px; color:#C9D2E4; font-size:18px; max-width:520px; }
.hero-ctas{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }
.hero-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; margin-top:52px; border-top:1px solid rgba(255,255,255,.14); }
.hero-stats div{ padding:22px 18px 26px; border-right:1px solid rgba(255,255,255,.14); }
.hero-stats div:last-child{ border-right:none; }
.hero-stats b{ display:block; font-family:var(--font-mono); font-size:clamp(20px,2.4vw,28px); color:var(--gold); letter-spacing:-.02em; }
.hero-stats span{ font-size:12.5px; color:#B7C2D8; }

/* Signature: live-classroom mockup */
.classroom-mock{
  background:#0F2545; border:1px solid rgba(198,161,91,.35); border-radius:8px;
  box-shadow:var(--shadow-lift); overflow:hidden;
}
.classroom-mock .bar{
  display:flex; align-items:center; gap:8px; padding:10px 14px; background:#0A1C38; border-bottom:1px solid rgba(255,255,255,.08);
}
.classroom-mock .dot{ width:9px; height:9px; border-radius:50%; background:#3a4a68; }
.classroom-mock .bar span{ margin-left:8px; font-family:var(--font-mono); font-size:11.5px; color:#7E8EAC; }
.classroom-mock .body{ padding:18px; display:grid; grid-template-columns:1.3fr .9fr; gap:14px; }
.tile-grid{ display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.tile{
  aspect-ratio:4/3; background:linear-gradient(150deg,#1A3560,#0E2245); border-radius:5px;
  display:flex; align-items:flex-end; padding:8px; font-size:11px; color:#C9D2E4; position:relative; border:1px solid rgba(255,255,255,.06);
}
.tile.me{ border:1px solid var(--gold); }
.tile.me::after{ content:'선생님'; position:absolute; top:6px; left:6px; font-family:var(--font-mono); font-size:9px; color:var(--gold); }
.side-panel{ display:flex; flex-direction:column; gap:10px; }
.mini-card{ background:#0A1C38; border:1px solid rgba(255,255,255,.08); border-radius:5px; padding:10px 12px; }
.mini-card h5{ margin:0 0 6px; font-family:var(--font-mono); font-size:10.5px; letter-spacing:.06em; color:var(--gold); text-transform:uppercase; }
.mini-card .row{ display:flex; align-items:center; gap:8px; font-size:12.5px; color:#DCE3F1; padding:4px 0; }
.check{ width:14px; height:14px; border-radius:3px; background:var(--gold); flex:none; display:inline-flex; align-items:center; justify-content:center; font-size:10px; color:#0A1C38; font-weight:700; }
.check.pending{ background:transparent; border:1px solid #4A5A78; }

/* ---------- Stat / number strip ---------- */
.stat-strip{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.stat-cell{ background:var(--white); padding:30px 22px; text-align:center; }
.stat-cell b{ display:block; font-family:var(--font-mono); font-size:clamp(24px,3vw,34px); color:var(--oxblood); }
.stat-cell span{ font-size:13px; color:var(--slate); }

/* ---------- Cards ---------- */
.grid{ display:grid; gap:22px; }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }

.card{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius);
  padding:26px; box-shadow:var(--shadow-card);
}
.card h3{ font-size:19px; margin-bottom:8px; }
.card p{ color:var(--slate); font-size:14.5px; }

.exam-card{
  background:var(--white); border:1px solid var(--line); border-top:3px solid var(--oxblood);
  border-radius:var(--radius); padding:26px; box-shadow:var(--shadow-card);
}
.exam-card .icon{ font-size:26px; }
.exam-card h3{ font-size:20px; margin:10px 0 2px; }
.exam-card .sub{ font-family:var(--font-mono); font-size:11.5px; color:var(--slate); }
.exam-card dl{ margin:16px 0 0; display:grid; grid-template-columns:auto 1fr; gap:6px 14px; font-size:13.5px; }
.exam-card dt{ color:var(--slate); }
.exam-card dd{ margin:0; font-weight:600; color:var(--navy); text-align:right; }
.exam-card .tags{ margin-top:16px; display:flex; gap:6px; flex-wrap:wrap; }
.tagpill{ font-family:var(--font-mono); font-size:10.5px; background:var(--paper-2); color:var(--navy); padding:4px 9px; border-radius:99px; border:1px solid var(--line); }

/* ---------- Timeline (curriculum by period) ---------- */
.timeline{ position:relative; padding-left:2px; }
.tl-item{ display:grid; grid-template-columns:150px 1fr; gap:26px; padding:26px 0; border-top:1px solid var(--line); }
.tl-item:first-child{ border-top:1px solid var(--line); }
.tl-when{ font-family:var(--font-mono); color:var(--oxblood); font-weight:700; font-size:14px; }
.tl-when small{ display:block; font-family:var(--font-body-en); color:var(--slate); font-weight:400; font-size:12px; margin-top:4px; }
.tl-body h4{ font-size:17.5px; margin-bottom:8px; }
.tl-body p{ color:var(--slate); font-size:14.5px; margin-bottom:10px; }
.tl-chips{ display:flex; gap:8px; flex-wrap:wrap; }
.chip{ font-size:12px; background:var(--paper-2); border:1px solid var(--line); padding:5px 11px; border-radius:99px; color:var(--navy); font-weight:600; }

/* ---------- Numbered process (strategy) ---------- */
.process-item{ display:flex; gap:20px; padding:22px 0; border-top:1px solid var(--line); }
.process-item .num{ font-family:var(--font-mono); font-size:13px; color:var(--gold); background:var(--navy); width:34px; height:34px; border-radius:50%; display:flex; align-items:center; justify-content:center; flex:none; }
.process-item h4{ font-size:16.5px; margin-bottom:6px; }
.process-item p{ color:var(--slate); font-size:14px; }

/* ---------- Testimonials ---------- */
.testi-card{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius); padding:26px;
  box-shadow:var(--shadow-card); display:flex; flex-direction:column; gap:14px;
}
.testi-score{ display:flex; align-items:baseline; gap:8px; }
.testi-score b{ font-family:var(--font-mono); font-size:30px; color:var(--oxblood); }
.testi-score span{ font-size:12.5px; color:var(--slate); }
.testi-card h4{ font-size:15.5px; }
.testi-card p{ font-size:14px; color:var(--slate); font-style:italic; }
.testi-card footer{ font-size:12px; color:var(--slate); font-family:var(--font-mono); border-top:1px dashed var(--line); padding-top:10px; }

/* ---------- Teacher card ---------- */
.teacher-card{ background:var(--white); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-card); }
.teacher-photo{
  height:170px; background:linear-gradient(160deg,var(--navy),#1c3a68); color:var(--gold);
  display:flex; align-items:center; justify-content:center; font-family:var(--font-display-en); font-size:44px; font-weight:600;
}
.teacher-body{ padding:22px; }
.teacher-body .role{ font-family:var(--font-mono); font-size:11.5px; color:var(--oxblood); letter-spacing:.04em; }
.teacher-body h3{ font-size:20px; margin:6px 0 10px; }
.teacher-body p{ font-size:14px; color:var(--slate); }

/* ---------- Location card ---------- */
.loc-card{ background:var(--white); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-card); }
.loc-map{ height:150px; background:
  repeating-linear-gradient(45deg,var(--paper-2),var(--paper-2) 10px,#E6E0CE 10px,#E6E0CE 20px);
  display:flex; align-items:center; justify-content:center; color:var(--oxblood); font-family:var(--font-mono); font-size:12px; letter-spacing:.06em;
}
.loc-body{ padding:22px; }
.loc-body h3{ font-size:19px; margin-bottom:4px; }
.loc-body .addr{ font-size:13.5px; color:var(--slate); margin-bottom:14px; }
.loc-list{ display:grid; gap:8px; font-size:13.5px; }
.loc-list li{ display:flex; gap:8px; }
.loc-list li b{ color:var(--navy); }

/* ---------- Forms ---------- */
.form-card{ background:var(--white); border:1px solid var(--line); border-radius:var(--radius); padding:32px; box-shadow:var(--shadow-card); }
.field{ margin-bottom:18px; }
.field label{ display:block; font-size:13.5px; font-weight:700; color:var(--navy); margin-bottom:8px; }
.field input,.field select,.field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:3px; font-family:inherit; font-size:14.5px; background:var(--paper);
}
.field input:focus,.field select:focus,.field textarea:focus{ outline:2px solid var(--gold); border-color:var(--gold); }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.radio-group{ display:flex; gap:10px; flex-wrap:wrap; }
.radio-pill{ border:1px solid var(--line); border-radius:99px; padding:9px 16px; font-size:13.5px; cursor:pointer; background:var(--paper); }
.radio-pill input{ display:none; }
.radio-pill:has(input:checked){ background:var(--navy); color:var(--white); border-color:var(--navy); }

/* ---------- CTA banner ---------- */
.cta-banner{
  background:linear-gradient(120deg,var(--oxblood),var(--oxblood-2));
  color:var(--white); border-radius:6px; padding:46px; display:flex; align-items:center; justify-content:space-between; gap:30px; flex-wrap:wrap;
}
.cta-banner h3{ color:var(--white); font-size:26px; }
.cta-banner p{ color:#F3D9DC; margin-top:8px; }

/* ---------- Footer ---------- */
footer.site-footer{ background:var(--navy); color:#AAB6CC; padding:56px 0 24px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:34px; padding-bottom:36px; border-bottom:1px solid rgba(255,255,255,.1); }
.footer-grid h5{ color:var(--gold); font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; text-transform:uppercase; margin-bottom:16px; }
.footer-grid li{ margin-bottom:10px; font-size:13.5px; }
.footer-grid a:hover{ color:var(--white); }
.footer-bottom{ display:flex; justify-content:space-between; padding-top:22px; font-size:12.5px; flex-wrap:wrap; gap:10px; }
.footer-logo{ font-family:var(--font-display-kr); font-weight:700; color:var(--white); font-size:20px; margin-bottom:10px; }

/* ---------- Breadcrumb / page hero (inner pages) ---------- */
.page-hero{ background:linear-gradient(180deg,var(--navy),#0E2140); color:var(--white); padding:56px 0 44px; }
.page-hero .eyebrow{ color:var(--gold); }
.page-hero .eyebrow::before{ background:var(--gold); }
.page-hero h1{ color:var(--white); font-size:clamp(28px,3.6vw,42px); margin:12px 0 12px; }
.page-hero p{ color:#C9D2E4; max-width:640px; font-size:16px; }
.crumb{ font-family:var(--font-mono); font-size:12px; color:#8FA0C0; margin-bottom:14px; }
.crumb a:hover{ color:var(--gold); }

/* ---------- Table ---------- */
table.datetable{ width:100%; border-collapse:collapse; background:var(--white); }
table.datetable th,table.datetable td{ padding:13px 16px; border-bottom:1px solid var(--line); text-align:left; font-size:13.5px; }
table.datetable th{ background:var(--navy); color:var(--white); font-weight:600; font-family:var(--font-mono); font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; }
table.datetable tr:hover td{ background:var(--paper-2); }
.table-wrap{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-card); }

/* ---------- Utilities ---------- */
.mt-8{ margin-top:8px;} .mt-16{margin-top:16px;} .mt-24{margin-top:24px;} .mt-40{margin-top:40px;}
.center{ text-align:center; margin-left:auto; margin-right:auto; }
.muted{ color:var(--slate); }
.divider{ height:1px; background:var(--line); margin:44px 0; border:none; }
.badge-online{
  display:inline-flex; align-items:center; gap:6px; background:#12351F; color:#9CE0B0;
  font-family:var(--font-mono); font-size:11px; padding:5px 10px; border-radius:99px;
}
.badge-online::before{ content:''; width:6px; height:6px; border-radius:50%; background:#3ED67A; }

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
  .hero-stats div:nth-child(2){ border-right:none; }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .grid-3{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width: 760px){
  nav.main-nav{
    position:fixed; inset:76px 0 0 0; background:var(--paper); flex-direction:column; padding:26px 24px;
    transform:translateX(100%); transition:transform .25s ease; gap:4px; height:calc(100vh - 76px); overflow-y:auto;
  }
  nav.main-nav.open{ transform:translateX(0); }
  nav.main-nav a{ padding:14px 0; border-bottom:1px solid var(--line); font-size:16px; }
  .hamburger{ display:block; }
  .nav-cta .btn-ghost{ display:none; }
  .topbar-locations{ display:none; }
  .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; }
  .field-row{ grid-template-columns:1fr; }
  .stat-strip{ grid-template-columns:repeat(2,1fr); }
  .tl-item{ grid-template-columns:1fr; gap:8px; }
  .classroom-mock .body{ grid-template-columns:1fr; }
  .cta-banner{ flex-direction:column; align-items:flex-start; text-align:left; }
  .footer-grid{ grid-template-columns:1fr; }
  .section{ padding:56px 0; }
}