/* =========================================================
   TOP EDU PREP — Design System
   Concept: "관제탑 (Control Tower)" — 시험 일정과 학습 진도를
   실시간으로 추적하는 입시 관제 센터라는 컨셉.
   Palette: 잉크네이비 + 페이퍼 + 브라스골드 + 시그널그린(온라인 라이브)
   Type: Fraunces(디스플레이/숫자) + Pretendard(본문, 한글) + IBM Plex Mono(데이터/타이머)
   ========================================================= */

:root{
  /* Colors */
  --ink:      #101A2E;   /* deep navy - primary */
  --ink-2:    #1B2A47;   /* navy, lighter panel */
  --paper:    #F6F4EC;   /* warm paper background */
  --paper-2:  #EFEBDD;   /* slightly deeper paper for panels */
  --brass:    #B8863F;   /* gold/brass accent */
  --brass-l:  #D9AF6E;
  --signal:   #1F7A5C;   /* "online live" signal green */
  --signal-l: #2FA37D;
  --rose:     #A23B3B;   /* alert / D-day accent */
  --ink-text: #1B2230;
  --muted:    #5B6270;
  --line:     rgba(16,26,46,0.12);
  --line-soft:rgba(16,26,46,0.07);
  --white:    #FFFFFF;

  /* Type */
  --f-display: 'Fraunces', 'Pretendard', serif;
  --f-body:    'Pretendard', -apple-system, 'Apple SD Gothic Neo', sans-serif;
  --f-mono:    'IBM Plex Mono', ui-monospace, monospace;

  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-text);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.65;
  -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{ font-family:var(--f-display); font-weight:600; margin:0; color:var(--ink); letter-spacing:-0.01em; }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:3px;
}

.wrap{ max-width:1180px; margin:0 auto; padding:0 24px; }
.eyebrow{
  font-family:var(--f-mono); font-size:11.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--brass); display:flex; align-items:center; gap:8px; font-weight:600;
}
.eyebrow::before{ content:''; width:16px; height:1px; background:var(--brass); display:inline-block; }

/* ---------- Top exam-countdown ticker (signature element) ---------- */
.ticker{
  background:var(--ink);
  color:var(--paper);
  overflow:hidden;
  position:relative;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.ticker-track{
  display:flex;
  gap:56px;
  white-space:nowrap;
  padding:7px 0;
  animation:scrollTicker 42s linear infinite;
  width:max-content;
}
.ticker:hover .ticker-track{ animation-play-state:paused; }
@keyframes scrollTicker{
  from{ transform:translateX(0); }
  to{ transform:translateX(-50%); }
}
.ticker-item{
  font-family:var(--f-mono);
  font-size:12.5px;
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  color:rgba(246,244,236,.92);
}
.ticker-item b{ color:var(--brass-l); font-weight:600; }
.ticker-item .dday{ color:var(--signal-l); font-weight:700; }

/* ---------- Header / Nav ---------- */
header.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(246,244,236,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px;
  max-width:1180px; margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark{
  width:34px; height:34px; border:1.5px solid var(--ink); border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--f-display); font-weight:700; font-size:14px; color:var(--ink);
  position:relative;
}
.brand-mark::after{
  content:''; position:absolute; width:6px; height:6px; border-radius:50%;
  background:var(--signal); top:-2px; right:-2px; box-shadow:0 0 0 2px var(--paper);
}
.brand-name{ font-family:var(--f-display); font-size:19px; font-weight:600; color:var(--ink); line-height:1.1; }
.brand-name span{ display:block; font-family:var(--f-mono); font-size:9.5px; letter-spacing:.12em; color:var(--muted); font-weight:500; text-transform:uppercase; margin-top:2px; }

nav.main-nav{ display:flex; gap:2px; }
nav.main-nav a{
  font-size:14.5px; color:var(--ink-text); padding:10px 14px; border-radius:var(--radius);
  transition:color .15s; position:relative; font-weight:500;
}
nav.main-nav a:hover{ color:var(--brass); }
nav.main-nav a.active{ color:var(--ink); font-weight:700; }
nav.main-nav a.active::after{
  content:''; position:absolute; left:14px; right:14px; bottom:4px; height:2px; background:var(--brass);
}
.nav-cta{
  display:flex; align-items:center; gap:10px;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 20px; font-size:14px; font-weight:600; border-radius:var(--radius);
  border:1px solid transparent; transition:all .15s; white-space:nowrap;
}
.btn-primary{ background:var(--ink); color:var(--paper); }
.btn-primary:hover{ background:var(--brass); color:var(--ink); }
.btn-outline{ border-color:var(--ink); color:var(--ink); }
.btn-outline:hover{ background:var(--ink); color:var(--paper); }
.btn-brass{ background:var(--brass); color:var(--ink); }
.btn-brass:hover{ background:var(--brass-l); }
.btn-sm{ padding:8px 14px; font-size:13px; }
.btn-live{
  display:inline-flex; align-items:center; gap:7px; font-family:var(--f-mono); font-size:12px;
  color:var(--signal); font-weight:600; border:1px solid var(--signal); padding:9px 14px; border-radius:var(--radius);
}
.dot-live{ width:7px; height:7px; border-radius:50%; background:var(--signal); animation:pulse 1.8s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:1; box-shadow:0 0 0 0 rgba(31,122,92,.5);} 50%{ opacity:.65; box-shadow:0 0 0 5px rgba(31,122,92,0);} }

.menu-toggle{ display:none; background:none; border:none; padding:8px; }
.menu-toggle span{ display:block; width:22px; height:2px; background:var(--ink); margin:4px 0; }

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(ellipse 900px 500px at 85% -10%, rgba(184,134,63,.12), transparent 60%),
    var(--ink);
  color:var(--paper);
  padding:76px 0 64px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:''; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(246,244,236,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,244,236,.045) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse 700px 500px at 70% 20%, black, transparent 70%);
  pointer-events:none;
}
.hero-grid{
  display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center;
  position:relative; z-index:1;
}
.hero h1{
  color:var(--paper); font-size:44px; line-height:1.18; margin:16px 0 20px; letter-spacing:-.015em;
}
.hero h1 em{ font-style:normal; color:var(--brass-l); }
.hero p.lead{ font-size:17px; color:rgba(246,244,236,.78); max-width:520px; margin-bottom:28px; }
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin-bottom:36px; }
.hero-stats{ display:flex; gap:28px; flex-wrap:wrap; }
.hero-stat b{ display:block; font-family:var(--f-display); font-size:26px; color:var(--brass-l); }
.hero-stat span{ font-family:var(--f-mono); font-size:11px; color:rgba(246,244,236,.6); letter-spacing:.05em; }

/* Hero panel — dual mode card (온라인 / 오프라인) */
.mode-panel{
  background:rgba(246,244,236,.05);
  border:1px solid rgba(246,244,236,.16);
  border-radius:4px;
  padding:4px;
}
.mode-tabs{ display:flex; gap:4px; margin-bottom:2px; }
.mode-tab{
  flex:1; text-align:center; padding:10px 6px; font-size:12.5px; font-family:var(--f-mono);
  color:rgba(246,244,236,.55); border-radius:3px; letter-spacing:.03em;
}
.mode-tab.on{ background:rgba(246,244,236,.1); color:var(--brass-l); font-weight:600; }
.mode-body{ padding:22px 20px 20px; }
.mode-body h3{ color:var(--paper); font-size:18px; margin-bottom:10px; }
.mode-body ul{ display:grid; gap:9px; }
.mode-body li{ font-size:13.5px; color:rgba(246,244,236,.75); display:flex; gap:8px; }
.mode-body li::before{ content:'—'; color:var(--brass); flex:none; }
.mode-foot{ display:flex; justify-content:space-between; align-items:center; margin-top:18px; padding-top:16px; border-top:1px solid rgba(246,244,236,.12); }

/* ---------- Section shells ---------- */
section{ padding:88px 0; }
section.tight{ padding:56px 0; }
.section-head{ max-width:640px; margin-bottom:44px; }
.section-head h2{ font-size:32px; margin-top:14px; line-height:1.28; }
.section-head p{ color:var(--muted); margin-top:14px; font-size:15.5px; }
.bg-ink{ background:var(--ink); color:var(--paper); }
.bg-ink h2, .bg-ink h3{ color:var(--paper); }
.bg-ink .section-head p{ color:rgba(246,244,236,.7); }
.bg-panel{ background:var(--paper-2); }

/* ---------- Cards / grids ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:22px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }

.card{
  background:var(--white); border:1px solid var(--line); border-radius:3px; padding:28px 26px;
}
.card-num{ font-family:var(--f-mono); font-size:12px; color:var(--brass); letter-spacing:.08em; margin-bottom:14px; display:block; }
.card h3{ font-size:19px; margin-bottom:10px; }
.card p{ color:var(--muted); font-size:14.5px; }

.pillar{
  border-left:2px solid var(--brass); padding-left:20px;
}
.pillar h3{ font-size:20px; margin-bottom:8px; }
.pillar p{ color:var(--muted); font-size:14.5px; }

/* Subject tags */
.subject-tag{
  display:inline-flex; align-items:center; gap:6px; font-family:var(--f-mono); font-size:11px;
  border:1px solid var(--line); padding:5px 10px; border-radius:20px; color:var(--ink-2); background:var(--paper);
  letter-spacing:.03em;
}

/* ---------- Curriculum table ---------- */
.curric-table{ width:100%; border-collapse:collapse; font-size:14.5px; }
.curric-table th{
  text-align:left; font-family:var(--f-mono); font-size:11px; letter-spacing:.06em; text-transform:uppercase;
  color:var(--brass); padding:12px 16px; border-bottom:2px solid var(--ink); background:transparent;
}
.curric-table td{ padding:15px 16px; border-bottom:1px solid var(--line-soft); vertical-align:top; }
.curric-table tr:hover td{ background:rgba(184,134,63,.05); }
.curric-table .lvl{
  font-family:var(--f-mono); font-size:11px; padding:3px 8px; border-radius:20px; border:1px solid var(--ink); display:inline-block;
}

/* ---------- Timeline (exam dates) ---------- */
.dday-band{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line);
  border:1px solid var(--line); margin-bottom:8px;
}
.dday-cell{ background:var(--white); padding:22px 20px; }
.dday-cell .label{ font-family:var(--f-mono); font-size:11px; letter-spacing:.08em; color:var(--muted); text-transform:uppercase; }
.dday-cell .num{ font-family:var(--f-display); font-size:34px; color:var(--ink); margin:6px 0 2px; }
.dday-cell .num span{ font-size:15px; color:var(--rose); font-family:var(--f-mono); font-weight:600; }
.dday-cell .sub{ font-size:12.5px; color:var(--muted); }

.exam-cal{ display:grid; gap:14px; }
.exam-row{
  display:grid; grid-template-columns:120px 1fr 160px; gap:18px; align-items:center;
  padding:18px 20px; border:1px solid var(--line); background:var(--white); border-radius:3px;
}
.exam-row .mo{ font-family:var(--f-mono); font-size:13px; color:var(--brass); font-weight:700; letter-spacing:.05em; }
.exam-row h4{ font-size:16px; }
.exam-row .dates{ font-size:13.5px; color:var(--muted); margin-top:4px; }
.exam-row .status{ font-family:var(--f-mono); font-size:11.5px; text-align:right; color:var(--muted); }

/* ---------- Testimonial ---------- */
.tmn{
  background:var(--white); border:1px solid var(--line); border-radius:3px; padding:26px; display:flex; flex-direction:column; gap:14px; height:100%;
}
.tmn .stars{ color:var(--brass); font-size:13px; letter-spacing:2px; }
.tmn p.quote{ font-size:14.5px; color:var(--ink-text); line-height:1.7; }
.tmn .who{ font-family:var(--f-mono); font-size:11.5px; color:var(--muted); border-top:1px solid var(--line-soft); padding-top:12px; margin-top:auto; }

/* ---------- Steps ---------- */
.steps{ counter-reset:step; display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.step{ position:relative; padding-top:8px; }
.step::before{
  counter-increment:step; content:counter(step,decimal-leading-zero);
  font-family:var(--f-mono); font-size:12px; color:var(--brass); display:block; margin-bottom:10px; letter-spacing:.06em;
}
.step h4{ font-size:16px; margin-bottom:8px; }
.step p{ font-size:13.5px; color:var(--muted); }

/* ---------- Locations ---------- */
.loc-card{ background:var(--white); border:1px solid var(--line); overflow:hidden; border-radius:3px; }
.loc-head{ padding:22px 22px 16px; border-bottom:1px solid var(--line-soft); }
.loc-head .eyebrow{ margin-bottom:8px; }
.loc-head h3{ font-size:20px; }
.loc-body{ padding:18px 22px 24px; display:grid; gap:10px; font-size:13.5px; color:var(--muted); }
.loc-body b{ color:var(--ink-text); }

/* ---------- Forms ---------- */
.form-grid{ display:grid; gap:16px; grid-template-columns:1fr 1fr; }
.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-text); }
.field input, .field select, .field textarea{
  border:1px solid var(--line); background:var(--white); padding:12px 14px; font-size:14.5px; border-radius:2px; font-family:inherit; color:var(--ink-text);
}
.field textarea{ resize:vertical; min-height:110px; }
.field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--brass); outline-offset:1px; border-color:var(--brass); }

/* ---------- Mock test ---------- */
.mt-shell{ background:var(--white); border:1px solid var(--line); border-radius:3px; overflow:hidden; }
.mt-topbar{
  background:var(--ink); color:var(--paper); padding:14px 22px; display:flex; justify-content:space-between; align-items:center; font-family:var(--f-mono); font-size:12.5px;
}
.mt-timer{ font-size:16px; font-weight:700; letter-spacing:.04em; }
.mt-timer.low{ color:#E08585; }
.mt-body{ padding:30px; }
.mt-q .qnum{ font-family:var(--f-mono); font-size:12px; color:var(--brass); margin-bottom:10px; display:block; }
.mt-q h4{ font-size:17px; line-height:1.5; margin-bottom:20px; }
.mt-choices{ display:grid; gap:10px; margin-bottom:22px; }
.mt-choice{
  display:flex; align-items:flex-start; gap:12px; padding:13px 16px; border:1px solid var(--line); border-radius:3px; text-align:left; background:var(--white); font-size:14.5px; transition:all .12s; width:100%;
}
.mt-choice:hover{ border-color:var(--brass); background:rgba(184,134,63,.05); }
.mt-choice .k{ font-family:var(--f-mono); font-weight:700; color:var(--ink); border:1px solid var(--ink); width:22px; height:22px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:12px; flex:none; }
.mt-choice.correct{ border-color:var(--signal); background:rgba(31,122,92,.08); }
.mt-choice.correct .k{ background:var(--signal); border-color:var(--signal); color:#fff; }
.mt-choice.wrong{ border-color:var(--rose); background:rgba(162,59,59,.07); }
.mt-choice.wrong .k{ background:var(--rose); border-color:var(--rose); color:#fff; }
.mt-choice[disabled]{ cursor:default; }
.mt-explain{ display:none; background:var(--paper-2); border-left:3px solid var(--brass); padding:14px 16px; font-size:13.5px; color:var(--ink-text); margin-bottom:20px; }
.mt-explain.show{ display:block; }
.mt-foot{ display:flex; justify-content:space-between; align-items:center; }
.mt-progress{ height:4px; background:var(--line); border-radius:2px; overflow:hidden; margin-bottom:0; }
.mt-progress-bar{ height:100%; background:var(--brass); width:10%; transition:width .3s; }
.mt-result{ display:none; text-align:center; padding:50px 20px; }
.mt-result.show{ display:block; }
.mt-result .score{ font-family:var(--f-display); font-size:56px; color:var(--ink); }

/* ---------- FAQ accordion ---------- */
.faq-item{ border-bottom:1px solid var(--line); }
.faq-q{ width:100%; text-align:left; background:none; border:none; padding:20px 4px; display:flex; justify-content:space-between; align-items:center; font-size:15.5px; font-weight:600; color:var(--ink-text); }
.faq-q .plus{ font-family:var(--f-mono); color:var(--brass); font-size:18px; transition:transform .2s; }
.faq-item.open .plus{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .25s ease; }
.faq-a-in{ padding:0 4px 20px; font-size:14.5px; color:var(--muted); max-width:760px; }

/* ---------- Footer ---------- */
footer{ background:var(--ink); color:rgba(246,244,236,.75); padding:60px 0 26px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px; padding-bottom:40px; border-bottom:1px solid rgba(246,244,236,.12); }
footer h5{ font-family:var(--f-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--brass-l); margin-bottom:16px; }
footer li{ margin-bottom:9px; font-size:13.5px; }
footer a:hover{ color:var(--brass-l); }
.footer-brand p{ font-size:13.5px; margin-top:12px; color:rgba(246,244,236,.6); max-width:280px; }
.footer-bottom{ display:flex; justify-content:space-between; padding-top:22px; font-size:12px; color:rgba(246,244,236,.45); flex-wrap:wrap; gap:10px; }
.footer-social{ display:flex; gap:10px; }
.footer-social a{ border:1px solid rgba(246,244,236,.25); padding:7px 12px; border-radius:20px; font-size:12px; font-family:var(--f-mono); }

/* ---------- Utility ---------- */
.center{ text-align:center; }
.mt-8{ margin-top:8px;} .mt-16{margin-top:16px;} .mt-24{margin-top:24px;} .mt-32{margin-top:32px;} .mt-48{margin-top:48px;}
.muted{ color:var(--muted); }
.divider{ height:1px; background:var(--line); margin:56px 0; }
.badge-online{
  display:inline-flex; align-items:center; gap:6px; font-family:var(--f-mono); font-size:11px; color:var(--signal); border:1px solid var(--signal); padding:4px 10px; border-radius:20px; font-weight:700;
}
.badge-online .dot-live{ width:6px; height:6px; }
.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.kicker-line{ height:1px; width:56px; background:var(--brass); margin-bottom:18px; }

/* Breadcrumb */
.crumb{ background:var(--paper-2); padding:16px 0; border-bottom:1px solid var(--line); }
.crumb .wrap{ font-family:var(--f-mono); font-size:12px; color:var(--muted); }
.crumb a:hover{ color:var(--brass); }

/* Page hero (secondary pages, shorter) */
.page-hero{ background:var(--ink); color:var(--paper); padding:52px 0 44px; }
.page-hero h1{ color:var(--paper); font-size:34px; margin-top:14px; }
.page-hero p{ color:rgba(246,244,236,.72); max-width:600px; margin-top:14px; font-size:15px; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px){
  .hero-grid{ grid-template-columns:1fr; }
  .grid-3,.grid-4{ grid-template-columns:repeat(2,1fr); }
  .steps{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .two-col{ grid-template-columns:1fr; gap:30px; }
  .dday-band{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width: 760px){
  nav.main-nav{
    position:fixed; top:97px; left:0; right:0; bottom:0; background:var(--paper);
    flex-direction:column; padding:20px 24px; transform:translateX(100%); transition:transform .25s ease;
    z-index:49; overflow-y:auto;
  }
  nav.main-nav.open{ transform:translateX(0); }
  nav.main-nav a{ padding:16px 4px; border-bottom:1px solid var(--line-soft); font-size:16px; }
  .menu-toggle{ display:block; }
  .nav-cta .btn-outline{ display:none; }
  .hero h1{ font-size:30px; }
  .grid-3,.grid-4,.grid-2{ grid-template-columns:1fr; }
  section{ padding:56px 0; }
  .form-grid{ grid-template-columns:1fr; }
  .exam-row{ grid-template-columns:1fr; gap:6px; }
  .exam-row .status{ text-align:left; }
  .footer-grid{ grid-template-columns:1fr; gap:28px; }
  .dday-band{ grid-template-columns:1fr 1fr; }
}