/* =============================================
   style.css — 메인 스타일시트
   ============================================= */

/* ── 리셋 & 기본 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font-sans); }

/* ── 레이아웃 유틸리티 ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section--alt {
  background: var(--bg-primary);
}

.section__eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section__title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.section__desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.section__header {
  margin-bottom: 36px;
}

/* ── 네비게이션 ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.nav__inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 7px;
  margin-right: 16px;
}

.nav__logo i {
  font-size: 20px;
  color: var(--susi-600);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav__links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  transition: color 0.15s, background 0.15s;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav__cta {
  margin-left: auto;
  background: var(--susi-600);
  color: var(--susi-50) !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-md) !important;
  font-weight: 600 !important;
  font-size: 0.875rem !important;
  transition: opacity 0.15s !important;
  background-color: var(--susi-600) !important;
}

.nav__cta:hover {
  opacity: 0.9;
}

/* ── 히어로 ── */
.hero {
  background: var(--bg-primary);
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--amber-50);
  color: var(--amber-800);
  padding: 5px 12px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero__title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.hero__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

.hero__btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  transition: opacity 0.15s, transform 0.1s;
}

.btn:hover { opacity: 0.9; }
.btn:active { transform: scale(0.98); }

.btn--susi   { background: var(--susi-600);    color: var(--susi-50); }
.btn--jeongsi { background: var(--jeongsi-600); color: var(--jeongsi-50); }
.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn--outline:hover { background: var(--bg-secondary); }

.hero__stats {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.hero__stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero__stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 3px;
}

/* 히어로 경로 다이어그램 */
.path-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
}

.path-diagram__root {
  text-align: center;
  margin-bottom: 16px;
}

.path-diagram__node {
  display: inline-block;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 9px 20px;
  font-size: 0.9rem;
  font-weight: 600;
}

.path-diagram__connector {
  height: 16px;
  width: 1px;
  background: var(--border);
  margin: 0 auto;
}

.path-diagram__label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 2px 0;
}

.path-diagram__branches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.path-branch {
  border: 1px solid;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.path-branch--susi   { border-color: var(--susi-600); }
.path-branch--jeongsi { border-color: var(--jeongsi-600); }

.path-branch__header {
  padding: 13px;
  text-align: center;
  color: white;
}

.path-branch__header--susi   { background: var(--susi-600); }
.path-branch__header--jeongsi { background: var(--jeongsi-600); }

.path-branch__icon { font-size: 18px; display: block; margin-bottom: 4px; }
.path-branch__name { font-size: 0.85rem; font-weight: 600; }
.path-branch__meta { font-size: 0.7rem; opacity: 0.85; margin-top: 2px; }

.path-branch__items {
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.path-branch__tag {
  font-size: 0.7rem;
  padding: 5px 9px;
  border-radius: 4px;
}

.path-branch__tag--susi   { background: var(--susi-50);    color: var(--susi-800); }
.path-branch__tag--jeongsi { background: var(--jeongsi-50); color: var(--jeongsi-800); }

/* ── 전형 안내 ── */
.jeonhyeong-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.jeonhyeong-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.jeonhyeong-card__header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
}

.jeonhyeong-card__header--susi   { background: var(--susi-600); }
.jeonhyeong-card__header--jeongsi { background: var(--jeongsi-600); }

.jeonhyeong-card__icon { font-size: 22px; }
.jeonhyeong-card__title { font-size: 1rem; font-weight: 700; }
.jeonhyeong-card__subtitle { font-size: 0.75rem; opacity: 0.85; margin-top: 2px; }

.jeonhyeong-card__body { padding: 12px; }

.jeonhyeong-item {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  margin-bottom: 7px;
}

.jeonhyeong-item:last-child { margin-bottom: 0; }

.jeonhyeong-item:hover { background: var(--bg-secondary); }

.jeonhyeong-item--susi:hover   { border-color: var(--susi-600); }
.jeonhyeong-item--jeongsi:hover { border-color: var(--jeongsi-600); }

.jeonhyeong-item__name { font-size: 0.9rem; font-weight: 600; }
.jeonhyeong-item__desc { font-size: 0.78rem; color: var(--text-secondary); margin-top: 3px; }
.jeonhyeong-item__arrow { font-size: 0.9rem; color: var(--text-light); }

/* ── 대학 비교 ── */
.compare-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.compare-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compare-card__head {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.compare-card__name { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }

.compare-card__badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 4px;
}

.badge--susi   { background: var(--susi-50);    color: var(--susi-800); }
.badge--jeongsi { background: var(--jeongsi-50); color: var(--jeongsi-800); }

.compare-card__body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.compare-row__label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.compare-row__value { font-size: 0.85rem; }

.ratio-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}

.ratio-bar__fill { height: 100%; border-radius: 2px; }
.ratio-bar__fill--susi   { background: var(--susi-600); }
.ratio-bar__fill--jeongsi { background: var(--jeongsi-600); }

.compare-card__check { color: var(--teal-600); font-weight: 600; }

/* ── 입시 일정 ── */
.timeline {
  max-width: 660px;
  display: flex;
  flex-direction: column;
}

.timeline__item {
  display: flex;
  gap: 18px;
  position: relative;
}

.timeline__item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 59px;
  top: 42px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline__date {
  min-width: 46px;
  text-align: right;
  padding-top: 12px;
}

.timeline__month {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.timeline__day {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.2;
}

.timeline__dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 10px;
  font-size: 14px;
}

.timeline__dot--susi    { background: var(--susi-600); color: var(--susi-50); }
.timeline__dot--jeongsi  { background: var(--jeongsi-600); color: var(--jeongsi-50); }
.timeline__dot--amber   { background: var(--amber-600); color: var(--amber-50); }

.timeline__content { padding: 10px 0 32px; flex: 1; }
.timeline__title { font-size: 0.95rem; font-weight: 700; margin-bottom: 5px; }
.timeline__desc  { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.65; }

/* ── FAQ ── */
.faq-list {
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item__q {
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.faq-item__q:hover { background: var(--bg-secondary); }

.faq-item__q-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--susi-50);
  color: var(--susi-800);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-item__text {
  font-size: 0.9rem;
  font-weight: 600;
  flex: 1;
}

.faq-item__chevron {
  font-size: 0.85rem;
  color: var(--text-light);
  transition: transform 0.25s;
  flex-shrink: 0;
}

.faq-item.open .faq-item__chevron { transform: rotate(180deg); }

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-item.open .faq-item__answer { max-height: 300px; }

.faq-item__answer-inner {
  padding: 0 18px 18px 54px;
}

/* ── 푸터 ── */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

.footer__logo {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.footer__logo i { color: var(--susi-600); }

.footer__note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── 반응형 ── */
@media (max-width: 768px) {
  .hero__inner        { grid-template-columns: 1fr; }
  .hero__title        { font-size: 1.75rem; }
  .jeonhyeong-grid    { grid-template-columns: 1fr; }
  .compare-grid       { grid-template-columns: 1fr; }
  .path-diagram       { display: none; }

  .nav__links { display: none; }
  .nav__cta   { margin-left: auto; }
}