/* ==========================================================
   혁신시대 — 홈 · 모의고사 · 환급안내 · 장학생 인터뷰 · 국어 칼럼
   ========================================================== */

/* ---------- Home hero (SDIJ 계열: 큰 영문 명제 + 국문 선언문) ---------- */
.hero { padding-top: clamp(28px, 4vw, 48px); }
.hero-strip {
  display: flex; flex-wrap: wrap; gap: 8px 28px; padding: 12px 0;
  border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule);
  font-size: 13px; color: var(--graphite);
}
.hero-strip span:last-child { margin-left: auto; letter-spacing: .3em; }
.hero-title {
  margin-top: clamp(56px, 9vw, 120px);
  font: 500 clamp(52px, 9.6vw, 150px)/0.98 var(--f-display);
  letter-spacing: -0.05em;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  margin-top: clamp(56px, 8vw, 104px); padding-bottom: clamp(72px, 9vw, 120px);
}
.hero-product { align-self: start; }
.manifesto { display: grid; gap: 30px; font: 400 clamp(18px, 1.6vw, 21px)/1.85 var(--f-display); letter-spacing: -0.02em; }
.manifesto strong { font-weight: 700; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; margin-top: 12px; font-family: var(--f-body); }

/* ---------- Figures ---------- */
.fig-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule); }
.fig { padding: 24px 24px 32px 0; }
.fig + .fig { padding-left: 24px; border-left: 1px solid var(--rule); }
.fig dt { font-size: 13px; color: var(--pencil); }
.fig dd { margin-top: 14px; font: 500 clamp(40px, 4.8vw, 64px)/1 var(--f-display); letter-spacing: -0.04em; font-variant-numeric: tabular-nums; }
.fig dd small { font-size: .42em; margin-left: 4px; letter-spacing: 0; }

/* ---------- Product cards ---------- */
.exam-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 3vw, 40px); }
.exam-card { display: grid; gap: 22px; }
.exam-img { aspect-ratio: 4 / 3; overflow: hidden; background: var(--wash); }
.exam-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2, .7, .2, 1); }
.exam-card:hover .exam-img img { transform: scale(1.03); }
.exam-body { display: grid; gap: 10px; }
.exam-chips { display: flex; gap: 6px; }
.exam-title { font: 600 clamp(21px, 2vw, 26px)/1.35 var(--f-display); letter-spacing: -0.03em; }
.exam-card:hover .exam-title { text-decoration: underline; text-underline-offset: 5px; text-decoration-thickness: 1px; }
.exam-short { color: var(--graphite); }
.exam-price { display: flex; align-items: baseline; gap: 12px; margin-top: 6px; padding-top: 14px; border-top: 1px solid var(--rule); }
.exam-price b { font-size: 20px; font-variant-numeric: tabular-nums; }
.exam-price span { font-size: 13px; color: var(--pencil); }

/* ---------- Payback band (black) ---------- */
.payback-band { padding-block: clamp(88px, 11vw, 152px); }
.payback-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: end; }
.payback-title { font: 500 clamp(44px, 6.6vw, 100px)/1.08 var(--f-display); letter-spacing: -0.05em; }
.payback-title s { color: #6F6E69; text-decoration-thickness: 2px; font-weight: 400; margin-right: .2em; }
.payback-side { display: grid; gap: 28px; justify-items: start; }
.payback-side p { color: #B9B8B2; max-width: 30em; }

/* ---------- Interview grid (hairline cells, like an answer sheet) ---------- */
.iv-grid { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.iv-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.iv-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.iv-card { display: flex; flex-direction: column; gap: 28px; min-height: 340px; padding: 32px 28px 28px; background: var(--paper); transition: background .2s; }
.iv-card:hover { background: var(--wash); }
.iv-grade { display: grid; gap: 6px; }
.iv-grade-label { font-size: 12px; color: var(--pencil); }
.iv-grade-fig { font: 500 44px/1 var(--f-display); letter-spacing: -0.03em; }
.iv-grade-fig i { font-style: normal; font-size: .5em; color: var(--pencil); margin: 0 .35em; vertical-align: .35em; }
.iv-quote { font: 500 19px/1.65 var(--f-display); letter-spacing: -0.02em; }
.iv-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin-top: auto; font-size: 13px; color: var(--graphite); }
.iv-meta span + span:not(.chip)::before { content: "·"; margin-right: 12px; color: var(--pencil); }

/* ---------- Column list ---------- */
.col-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.filter-btn { height: 36px; padding: 0 16px; border: 1px solid var(--rule); font-size: 14px; color: var(--graphite); }
.filter-btn:hover { border-color: var(--ink); color: var(--ink); }
.filter-btn[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.col-list { border-top: 1px solid var(--ink); }
.col-row { display: grid; grid-template-columns: 150px minmax(0, 1fr) auto; gap: 32px; align-items: baseline; padding: 30px 0; border-bottom: 1px solid var(--rule); }
.col-when { display: grid; gap: 4px; font-size: 13px; color: var(--pencil); }
.col-when span:last-child { color: var(--ink); font-weight: 500; }
.col-main { display: grid; gap: 8px; }
.col-title { font: 600 clamp(20px, 2vw, 25px)/1.4 var(--f-display); letter-spacing: -0.03em; }
.col-row:hover .col-title { text-decoration: underline; text-underline-offset: 5px; text-decoration-thickness: 1px; }
.col-dek { color: var(--graphite); max-width: 60ch; }
.col-read { font-size: 13px; color: var(--pencil); }

/* ---------- Article (column) ---------- */
.back-link { display: inline-block; margin-bottom: 40px; font-size: 14px; color: var(--graphite); }
.back-link:hover { color: var(--ink); }
.article, .iv-article { max-width: 720px; margin-inline: auto; padding-top: clamp(48px, 6vw, 80px); }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: 13px; color: var(--pencil); }
.article-title { margin-top: 20px; font: 600 clamp(30px, 4vw, 46px)/1.3 var(--f-display); letter-spacing: -0.04em; }
.article-dek { margin-top: 18px; font-size: 19px; color: var(--graphite); }
.article-by { margin-top: 28px; padding-bottom: 32px; border-bottom: 1px solid var(--ink); font-size: 14px; }
.article-body { padding-top: 40px; font: 400 18px/2 var(--f-display); letter-spacing: -0.015em; }
.article-body p + p { margin-top: 1.3em; }
.article-body h3 { margin: 2.2em 0 .7em; font: 700 20px/1.5 var(--f-body); letter-spacing: -0.02em; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 72px; border-top: 1px solid var(--rule); }
.pager a { display: grid; gap: 4px; padding: 24px 0; font-weight: 500; }
.pager a:last-child:not(:first-child) { text-align: right; }
.pager small { font-size: 12px; font-weight: 400; color: var(--pencil); }
.pager a:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Interview article ---------- */
.iv-head { display: grid; gap: 18px; padding-bottom: 36px; border-bottom: 1px solid var(--ink); }
.iv-head .iv-grade-fig { font-size: 64px; }
.iv-head .iv-meta { margin-top: 0; }
.iv-head-quote { font: 500 clamp(26px, 3.2vw, 38px)/1.45 var(--f-display); letter-spacing: -0.035em; }
.qa { display: grid; }
.qa-item { padding: 32px 0; border-bottom: 1px solid var(--rule); display: grid; gap: 12px; }
.qa-item dt { display: flex; gap: 12px; font-weight: 600; font-size: 17px; }
.qa-mark { font: 500 14px/1.9 var(--f-mono); }
.qa-item dd { padding-left: 24px; font: 400 18px/1.9 var(--f-display); color: var(--graphite); }

/* ---------- Refund ---------- */
.rf-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.rf-fig { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 20px; font: 500 clamp(56px, 8vw, 112px)/1 var(--f-display); letter-spacing: -0.05em; }
.rf-fig s { font-size: .42em; color: var(--pencil); font-weight: 400; text-decoration-thickness: 2px; letter-spacing: -0.02em; }
.rf-note { margin-top: 20px; color: var(--graphite); }
.rf-conds { border-top: 1px solid var(--ink); }
.rf-conds li { display: grid; grid-template-columns: 96px 1fr; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--rule); }
.rf-k { font-size: 13px; color: var(--pencil); padding-top: 3px; }
.rf-v { font-size: 17px; font-weight: 500; }
.rf-v small { display: block; margin-top: 4px; font-size: 14px; font-weight: 400; color: var(--graphite); }

.steps-band { padding-block: clamp(80px, 10vw, 128px); }
.steps-band .sec-title { color: var(--paper); }
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--ink-rule); }
.step { display: grid; align-content: start; gap: 12px; padding: 28px 24px 0 0; }
.step + .step { padding-left: 24px; border-left: 1px solid var(--ink-rule); }
.step-no { font: 500 12px var(--f-mono); letter-spacing: .12em; color: #8F8E88; }
.step-t { font: 500 24px/1.3 var(--f-display); letter-spacing: -0.03em; }
.step-d { font-size: 14px; color: #B9B8B2; }

.univ { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.univ-group { padding: 24px 24px 8px 0; }
.univ-group + .univ-group { padding-left: 24px; border-left: 1px solid var(--rule); }
.univ-group h3 { font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.univ-group li { font-size: 15px; line-height: 2.1; color: var(--graphite); }

.faq { border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--rule); }
.faq-item summary { display: flex; align-items: baseline; gap: 16px; padding: 24px 40px 24px 0; position: relative; cursor: pointer; list-style: none; font-size: 17px; font-weight: 500; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 20px; font: 300 26px/1 var(--f-body); transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-q { font: 500 14px var(--f-mono); }
.faq-item p { padding: 0 40px 28px 30px; color: var(--graphite); max-width: 70ch; }

/* ---------- Exams: statement, compare, survey ---------- */
.statement { font: 400 clamp(26px, 3.4vw, 44px)/1.6 var(--f-display); letter-spacing: -0.035em; color: var(--pencil); }
.statement strong { color: var(--ink); font-weight: 600; }
.table-wrap { overflow-x: auto; border-top: 1px solid var(--ink); }
.compare { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 15px; }
.compare th, .compare td { padding: 22px 20px; text-align: left; border-bottom: 1px solid var(--rule); vertical-align: top; }
.compare thead th { font-size: 13px; font-weight: 500; color: var(--pencil); }
.compare thead th.us { background: var(--ink); color: var(--paper); }
.compare tbody th { width: 22%; font-weight: 500; color: var(--graphite); }
.compare td.us { font-weight: 600; background: var(--wash); }
.compare td.them { color: var(--pencil); }

.survey { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.survey-lead dd { font: 500 clamp(64px, 8vw, 112px)/1 var(--f-display); letter-spacing: -0.05em; font-variant-numeric: tabular-nums; margin-top: 12px; }
.survey-lead dd small { font-size: .4em; margin-left: 4px; }
.survey-lead dt { font-size: 15px; color: var(--graphite); }
.survey-src { margin-top: 16px; font-size: 12px; color: var(--pencil); }
.survey-bars { border-top: 1px solid var(--ink); }
.survey-bars li { display: grid; grid-template-columns: 1fr auto; gap: 10px 24px; padding: 20px 0; border-bottom: 1px solid var(--rule); }
.survey-bars b { font: 500 28px/1 var(--f-display); font-variant-numeric: tabular-nums; }
.survey-bars .bar { grid-column: 1 / -1; height: 4px; background: var(--wash); }
.survey-bars .bar i { display: block; height: 100%; background: var(--ink); }

.cta-band { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; padding: 40px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.cta-band p { font: 500 clamp(22px, 2.4vw, 30px)/1.4 var(--f-display); letter-spacing: -0.03em; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .payback-inner, .rf-top, .survey { grid-template-columns: 1fr; }
  .hero-strip span:last-child { margin-left: 0; }
  .fig-row { grid-template-columns: repeat(2, 1fr); }
  .fig:nth-child(3) { padding-left: 0; border-left: 0; }
  .fig:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .iv-grid.cols-3, .iv-grid.cols-2 { grid-template-columns: 1fr; }
  .iv-card { min-height: 0; }
  .steps { grid-template-columns: 1fr; }
  .step, .step + .step { padding: 22px 0; border-left: 0; border-bottom: 1px solid var(--ink-rule); grid-template-columns: 48px 1fr; }
  .step-d { grid-column: 2; }
  .univ { grid-template-columns: 1fr; }
  .univ-group + .univ-group { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
  .univ-group ul { columns: 2; }
  .col-row { grid-template-columns: 1fr; gap: 10px; }
  .col-when { display: flex; gap: 12px; }
  .col-read { display: none; }
}
@media (max-width: 640px) {
  .exam-grid { grid-template-columns: 1fr; }
  .pager { grid-template-columns: 1fr; }
  .pager a:last-child:not(:first-child) { text-align: left; border-top: 1px solid var(--rule); }
}