/* =========================================================
   TopEduPrep — Shared Stylesheet
   Design concept: "채점 노트" — a graded worksheet / study ledger.
   Grid-paper ground, dark ink type, a single red-pen accent
   used the way a teacher marks a page: checks, circles, ticks.
   ========================================================= */

:root{
  --ink:#1B2420;
  --navy:#26332C;
  --navy-deep:#161F1B;
  --parchment:#EEF0E7;
  --parchment-2:#E3E7DA;
  --brass:#C4402A;        /* pen-red accent */
  --brass-light:#DB7A63;
  --oxblood:#1B2420;       /* primary button = ink, red stays an accent, not a fill */
  --line:#CDD3C2;
  --grid:rgba(27,36,32,.055);
  --check:#3B7A57;
  --white:#FFFFFF;

  --font-display:"Pretendard","Noto Sans KR",sans-serif;
  --font-body:"Pretendard","Noto Sans KR",sans-serif;
  --font-hand:"Gaegu","Pretendard",sans-serif;

  --maxw:1180px;
  --radius:3px;
  --dur:.5s;
  --ease:cubic-bezier(.22,.61,.36,1);
}

html[data-theme="forest"]{
  --ink:#1B2622; --navy:#233229; --navy-deep:#121A16;
  --parchment:#EDF0E6; --parchment-2:#E1E6D6;
  --brass:#3B7A57; --brass-light:#6FA985; --oxblood:#1B2622;
  --line:#CBD3C0; --check:#B0522F;
}
html[data-theme="charcoal"]{
  --ink:#201F22; --navy:#2C2A2F; --navy-deep:#141316;
  --parchment:#EFEDEA; --parchment-2:#E4E1DC;
  --brass:#B5433E; --brass-light:#D97a63; --oxblood:#201F22;
  --line:#D3CFC9; --check:#4C7C63;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--parchment);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:27px 27px;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.015em;
  line-height:1.22;
  margin:0 0 .5em;
  color:var(--ink);
}
h3,h4{font-weight:700;}
p{margin:0 0 1em;max-width:62ch;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--dark{background:var(--navy-deep);color:var(--parchment);}
.section--dark h2,.section--dark h3{color:var(--white);}
.section--dark p{color:#C3CBC1;}
.eyebrow{
  font-family:var(--font-hand);
  font-size:1.05rem;
  color:var(--brass);
  margin:0 0 .3em;
  font-weight:700;
}
.divider{border:0;border-top:1px solid var(--line);margin:0;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;
  border-radius:var(--radius);
  font-weight:700;
  font-size:.98rem;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn-primary{background:var(--oxblood);color:var(--white);}
.btn-primary:hover{background:var(--brass);transform:translateY(-2px);}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:var(--white);}
.btn-ghost.on-dark{border-color:#5C6659;color:var(--white);}
.btn-ghost.on-dark:hover{background:var(--white);color:var(--ink);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(238,240,231,.92);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  height:76px;
}
.logo{
  font-family:var(--font-display);
  font-size:1.22rem;
  font-weight:800;
  color:var(--ink);
  display:flex;flex-direction:column;line-height:1.1;
}
.logo small{font-family:var(--font-hand);font-weight:700;font-size:.8rem;color:var(--brass);letter-spacing:.02em;}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{font-size:.94rem;color:var(--ink);position:relative;padding:4px 0;}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--brass);
  transition:width .25s var(--ease);
}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.3s;}

@media (max-width:900px){
  .nav-links{
    position:fixed;inset:76px 0 0 0;background:var(--parchment);
    flex-direction:column;justify-content:flex-start;align-items:flex-start;
    padding:32px 24px;gap:22px;transform:translateX(100%);transition:transform .35s var(--ease);
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{font-size:1.15rem;}
  .nav-toggle{display:block;}
  .nav-cta .btn-ghost{display:none;}
}

/* ---------- Hero ---------- */
.hero{padding:72px 0 96px;overflow:hidden;}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.hero h1{
  font-size:clamp(2.15rem,4vw,3.3rem);
}
.hero .lede{font-size:1.1rem;color:#3A4339;max-width:46ch;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px;}
.hero-anim{opacity:0;transform:translateY(16px);animation:rise .8s var(--ease) forwards;}
.hero-anim.d1{animation-delay:.08s;}
.hero-anim.d2{animation-delay:.18s;}
.hero-anim.d3{animation-delay:.28s;}
.hero-anim.d4{animation-delay:.4s;}
@keyframes rise{to{opacity:1;transform:none;}}
@media (prefers-reduced-motion:reduce){
  .hero-anim{opacity:1;transform:none;animation:none;}
}

/* roadmap / checklist diagram */
.roadmap{position:relative;padding-left:6px;}
.roadmap-line{
  position:absolute;left:19px;top:14px;bottom:14px;width:0;border-left:2px dashed var(--line);
}
.roadmap-line i{
  display:block;width:2px;height:0;background:var(--brass);margin-left:-1.5px;
  animation:draw 1.6s .5s var(--ease) forwards;
}
@keyframes draw{to{height:100%;}}
@media (prefers-reduced-motion:reduce){.roadmap-line i{height:100%;animation:none;}}
.roadmap-step{
  position:relative;display:flex;gap:20px;padding:14px 0;
}
.roadmap-num{
  flex:0 0 auto;width:40px;height:40px;border-radius:6px;
  background:var(--white);border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-body);font-weight:800;color:var(--ink);
  z-index:1;transform:rotate(-2deg);
}
.roadmap-step:nth-child(even) .roadmap-num{transform:rotate(2deg);}
.roadmap-step:hover .roadmap-num{border-color:var(--brass);color:var(--brass);background:var(--parchment-2);}
.roadmap-body h4{margin:.15em 0 .25em;font-size:1.02rem;font-weight:700;}
.roadmap-body p{margin:0;font-size:.92rem;color:#4B5449;}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
}

/* layout variant B: split hero, image-first */
html[data-layout="b"] .hero-grid{grid-template-columns:.9fr 1.1fr;}
html[data-layout="b"] .hero-grid > *:first-child{order:2;}
html[data-layout="b"] .hero-grid > *:last-child{order:1;}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;}}

/* ---------- Rows (strengths / philosophy) ---------- */
.row-list{border-top:1px solid var(--line);}
.row-item{
  display:grid;grid-template-columns:44px 1fr;column-gap:24px;
  padding:32px 0;border-bottom:1px solid var(--line);align-items:start;
}
.row-item::before{
  content:"✓";grid-column:1;grid-row:1/3;
  width:34px;height:34px;margin-top:.1em;
  border:1.5px solid var(--brass);border-radius:50%;
  color:var(--brass);font-weight:800;font-size:.95rem;
  display:flex;align-items:center;justify-content:center;
}
.row-item>h3{grid-column:2;grid-row:1;margin:0 0 .3em;font-size:1.18rem;}
.row-item>p{grid-column:2;grid-row:2;margin:0;color:#3A4339;}
@media (max-width:760px){
  .row-item{grid-template-columns:34px 1fr;column-gap:16px;}
}

/* ---------- Program grid ---------- */
.program-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.program-card{
  background:var(--parchment);padding:32px 26px;position:relative;
  transition:background .25s var(--ease);
}
.program-card:hover{background:var(--white);}
.program-card .tag{
  display:inline-block;font-size:.72rem;font-weight:700;
  color:var(--brass);background:transparent;border:1.5px dashed var(--brass);
  padding:3px 11px;border-radius:20px;margin-bottom:14px;transform:rotate(-2deg);
}
.program-card h3{font-size:1.15rem;margin-bottom:.4em;}
.program-card p{font-size:.9rem;color:#4B5449;margin-bottom:1.2em;}
.program-card .go{font-size:.88rem;font-weight:700;color:var(--brass);border-bottom:1.5px solid transparent;transition:border-color .2s var(--ease);}
.program-card:hover .go{border-color:var(--brass);}
@media (max-width:900px){.program-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.program-grid{grid-template-columns:1fr;}}

/* ---------- Campus ---------- */
.campus-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.campus-card{border:1px solid var(--line);padding:26px 22px;background:var(--white);}
.campus-card .pin{width:32px;height:32px;margin-bottom:14px;color:var(--brass);}
.campus-card h3{font-size:1.08rem;margin-bottom:.2em;}
.campus-card .transit{font-size:.85rem;color:var(--brass);font-weight:700;margin-bottom:.6em;}
.campus-card p{font-size:.9rem;color:#4B5449;margin:0;}
@media (max-width:900px){.campus-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.campus-grid{grid-template-columns:1fr;}}

/* ---------- Testimonials: graded margin-notes ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding-top:10px;}
.quote{
  position:relative;background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.14);border-radius:2px;
  padding:26px 22px 20px;
}
.quote:nth-child(1){transform:rotate(-.6deg);}
.quote:nth-child(2){transform:rotate(.5deg);}
.quote:nth-child(3){transform:rotate(-.35deg);}
.quote::before{
  content:"✓";position:absolute;top:-13px;left:20px;width:26px;height:26px;
  background:var(--brass);color:#fff;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:.82rem;font-weight:800;
}
.quote p{font-size:1rem;color:var(--parchment);font-style:normal;margin-bottom:.2em;}
.quote cite{display:block;margin-top:14px;font-family:var(--font-hand);font-size:1.1rem;color:var(--brass-light);font-style:normal;}
@media (max-width:900px){.quote-grid{grid-template-columns:1fr;}}

/* ---------- Blog cards ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}
.post-card{padding-top:2px;}
.post-card .cat{
  display:inline-block;font-size:.74rem;font-weight:700;color:var(--navy);
  border:1.5px dashed var(--line);padding:2px 10px;border-radius:20px;margin-bottom:12px;
}
.post-card h3{font-size:1.12rem;margin:.2em 0 .5em;}
.post-card p{font-size:.9rem;color:#4B5449;}
.post-card .read{font-size:.86rem;font-weight:700;color:var(--brass);border-bottom:1.5px solid transparent;transition:border-color .2s var(--ease);}
.post-card:hover .read{border-color:var(--brass);}
@media (max-width:900px){.post-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:600px){.post-grid{grid-template-columns:1fr;}}

/* ---------- Article ---------- */
.article-head{padding:56px 0 20px;}
.article-head .cat{
  display:inline-block;font-size:.85rem;font-weight:700;color:var(--brass);
  border:1.5px dashed var(--brass);padding:2px 11px;border-radius:20px;
}
.article-head h1{font-size:clamp(1.7rem,3.4vw,2.5rem);margin-top:.4em;}
.article-meta{color:#5C6659;font-size:.9rem;margin-top:.6em;}
.article-body{max-width:74ch;margin:0 auto;padding-bottom:80px;}
.article-body h2{font-size:1.4rem;margin-top:1.7em;}
.article-body h3{font-size:1.15rem;margin-top:1.3em;}
.article-body p{max-width:none;color:#232B21;}
.article-body ul,.article-body ol{padding-left:1.3em;color:#232B21;}
.article-body li{margin-bottom:.5em;}
.summary-box{
  background:var(--white);border:1px solid var(--line);border-left:3px solid var(--brass);
  padding:20px 24px;margin:1.6em 0;font-size:.95rem;
}
.summary-box strong{color:var(--ink);}
table.compare{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.92rem;}
table.compare th,table.compare td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
table.compare th{background:var(--navy);color:var(--white);font-weight:700;}
table.compare tr:nth-child(even) td{background:var(--parchment-2);}

/* ---------- Forms ---------- */
.form-card{background:var(--white);border:1px solid var(--line);padding:36px;max-width:560px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:.88rem;font-weight:700;margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);background:var(--parchment);
  font-family:var(--font-body);font-size:.95rem;border-radius:2px;
}
.field textarea{min-height:110px;resize:vertical;}
.contact-strip{display:flex;gap:16px;flex-wrap:wrap;margin-top:10px;}
.contact-pill{
  display:flex;align-items:center;gap:10px;border:1px solid var(--line);
  padding:10px 16px;background:var(--white);font-weight:700;font-size:.9rem;
}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-deep);color:#AEB6A8;padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.site-footer h4{color:var(--white);font-size:.95rem;font-family:var(--font-body);margin-bottom:14px;}
.site-footer a{color:#AEB6A8;font-size:.9rem;}
.site-footer a:hover{color:var(--brass-light);}
.footer-links{display:flex;flex-direction:column;gap:9px;}
.footer-bottom{
  border-top:1px solid #2B342C;margin-top:40px;padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:.8rem;color:#6F7A6D;
}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr;}}

/* ---------- Settings / theme picker ---------- */
.pref-toggle{
  position:fixed;right:22px;bottom:22px;z-index:200;
  width:50px;height:50px;border-radius:50%;background:var(--ink);color:var(--white);
  border:1.5px solid var(--brass);display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 6px 18px rgba(0,0,0,.2);
}
.pref-panel{
  position:fixed;right:22px;bottom:82px;z-index:200;width:240px;
  background:var(--white);border:1px solid var(--line);padding:18px;
  display:none;box-shadow:0 10px 30px rgba(0,0,0,.15);
}
.pref-panel.open{display:block;}
.pref-panel h5{margin:0 0 8px;font-size:.85rem;font-family:var(--font-body);}
.swatches{display:flex;gap:10px;margin-bottom:16px;}
.swatch{width:26px;height:26px;border-radius:50%;cursor:pointer;border:2px solid transparent;}
.swatch[data-theme="navy"]{background:#1B2420;}
.swatch[data-theme="forest"]{background:#1B2622;}
.swatch[data-theme="charcoal"]{background:#201F22;}
.swatch.active{border-color:var(--brass);}
.layout-opts{display:flex;gap:8px;}
.layout-opt{flex:1;text-align:center;padding:8px;border:1px solid var(--line);font-size:.78rem;cursor:pointer;}
.layout-opt.active{border-color:var(--brass);color:var(--brass);font-weight:700;}

/* ---------- Editor mode (index page) ---------- */
.editor-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:300;background:var(--navy-deep);color:var(--white);
  display:none;align-items:center;justify-content:center;gap:16px;padding:14px;font-size:.9rem;
}
.editor-bar.on{display:flex;}
.editor-bar .btn{padding:9px 18px;font-size:.85rem;}
[contenteditable="true"]{outline:1px dashed var(--brass);outline-offset:4px;cursor:text;}
.edit-only{display:none;}
body.editing .edit-only{display:inline-flex;}
body.editing [data-editor-start]{display:none;}

/* utility */
.center{text-align:center;}
.mt0{margin-top:0;}
.section-head{max-width:640px;margin:0 auto 52px;}
.section-head.left{margin:0 0 52px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;}