@import url('https://cdn.jsdelivr.net/npm/@tabler/icons-webfont@2.44.0/tabler-icons.min.css');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap');

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;
  color: #202124;
  background: #f1f3f4;
  font-size: 14px;
}

a { text-decoration: none; color: inherit; }

/* ── Navigation ── */
.gs-nav {
  background: #0F6E56;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.gs-nav-logo { display: flex; flex-direction: column; gap: 1px; }
.gs-nav-logo .kr { color: #fff; font-size: 15px; font-weight: 700; }
.gs-nav-logo .en { color: rgba(255,255,255,0.7); font-size: 11px; }
.gs-nav-links { display: flex; gap: 4px; }
.gs-nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 4px;
  transition: background .15s;
}
.gs-nav-links a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.gs-nav-links a.active { background: rgba(255,255,255,0.2); color: #fff; font-weight: 700; }
.gs-nav-icons { display: flex; gap: 12px; }
.gs-nav-icons a { color: rgba(255,255,255,0.8); font-size: 20px; transition: color .15s; }
.gs-nav-icons a:hover { color: #fff; }

/* ── Page wrapper ── */
.page-wrap {
  width: 90%;
  margin: 0 auto;
  padding: 28px 0 48px;
}

/* ── Hero banner ── */
.gs-hero {
  position: relative;
  background-image: url('images/groups.png');
  background-size: cover;
  background-position: center;
  padding: 56px 40px;
  text-align: center;
  border-radius: 8px 8px 0 0;
  overflow: hidden;
}
.gs-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15, 110, 86, 0.75);
  z-index: 0;
}
.gs-hero > * {
  position: relative;
  z-index: 1;
}
.gs-hero-sub {
  padding: 40px 40px !important;
}
.gs-hero h1 { color: #fff; font-size: 28px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.gs-hero p { color: rgba(255,255,255,0.88); font-size: 13px; line-height: 1.85; margin-bottom: 4px; }
.gs-hero-btn {
  display: inline-block;
  margin-top: 22px;
  background: #fff;
  color: #0F6E56;
  font-size: 13px;
  font-weight: 700;
  padding: 12px 30px;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity .15s;
}
.gs-hero-btn:hover { opacity: 0.9; }

/* ── Body card ── */
.gs-body {
  background: #fff;
  border-radius: 0 0 8px 8px;
  border: 1px solid #dadce0;
  border-top: none;
  overflow: hidden;
}
.gs-hero + .gs-body { border-top: none; }

/* ── Section ── */
.sec { border-top: 1px solid #e8eaed; }
.sec-head { padding: 28px 32px 16px; }
.sec-head h2 { font-size: 18px; font-weight: 700; color: #202124; }
.sec-head .en { font-size: 12px; color: #9aa0a6; margin-top: 4px; }
.sec-body { padding: 0 32px 28px; }
.sec-body p { font-size: 13px; color: #5f6368; line-height: 1.85; margin-bottom: 5px; }
.sec-body ul { padding-left: 20px; }
.sec-body ul li { font-size: 13px; color: #5f6368; line-height: 1.9; }

/* ── Notice list (accordion) ── */
.notice-item {
  border-bottom: 1px solid #f1f3f4;
}
.notice-item:last-child { border-bottom: none; }
.notice-item.open { background: #f8fffe; }

.notice-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 32px;
  cursor: pointer;
  transition: background .1s;
  user-select: none;
}
.notice-header:hover { background: #f8f9fa; }
.notice-item.open .notice-header { background: #f0faf7; }

.notice-header-left { flex: 1; }
.notice-header-right { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }

.notice-title { font-size: 13px; font-weight: 500; color: #202124; margin-bottom: 3px; }
.notice-sub { font-size: 11px; color: #5f6368; }
.notice-date { font-size: 11px; color: #9aa0a6; white-space: nowrap; }

.notice-chevron {
  font-size: 16px;
  color: #9aa0a6;
  transition: transform .2s;
}
.notice-item.open .notice-chevron { transform: rotate(180deg); color: #1D9E75; }

.notice-body {
  display: none;
  padding: 0 32px 20px 32px;  border-top: 1px dashed #e8eaed;
  margin: 0 32px;
}
.notice-item.open .notice-body { display: block; }
.notice-body p {
  font-size: 13px;
  color: #3c4043;
  line-height: 1.85;
  margin-top: 14px;
  margin-bottom: 0;
  padding: 0;
}
.notice-body p + p { margin-top: 6px; }
.notice-body .notice-body-en {
  font-size: 12px;
  color: #5f6368;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid #f1f3f4;
}

/* ── Card grid 3col ── */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #e8eaed;
}
.card-cell {
  padding: 24px 24px;
  border-right: 1px solid #e8eaed;
  transition: background .1s;
  cursor: pointer;
}
.card-cell:hover { background: #f8f9fa; }
.card-cell:last-child { border-right: none; }
.card-icon { font-size: 28px; color: #1D9E75; margin-bottom: 12px; }
.card-title { font-size: 14px; font-weight: 700; color: #202124; margin-bottom: 6px; }
.card-desc { font-size: 12px; color: #5f6368; line-height: 1.65; }

/* ── Image + text ── */
.img-text {
  display: grid;
  grid-template-columns: 140px 1fr;
  border-top: 1px solid #e8eaed;
}
.img-box {
  background: #f8f9fa;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 16px;
  gap: 8px;
  border-right: 1px solid #e8eaed;
  color: #9aa0a6;
  font-size: 11px;
  text-align: center;
}
.img-box i { font-size: 40px; margin-bottom: 4px; }
.img-box img { width: 100px; height: 120px; object-fit: cover; border-radius: 4px; }
.img-text-content { padding: 24px 28px; }
.role-tag {
  display: inline-block;
  font-size: 10px;
  background: #e6f4ea;
  color: #137333;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  font-weight: 500;
}
.person-name { font-size: 20px; font-weight: 700; color: #202124; margin-bottom: 2px; }
.person-name-en { font-size: 12px; color: #9aa0a6; margin-bottom: 14px; }
.person-quote { font-size: 13px; color: #3c4043; line-height: 1.85; margin-bottom: 8px; }
.person-quote-en { font-size: 12px; color: #5f6368; line-height: 1.8; }

/* ── Programs grid ── */
.prog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid #e8eaed;
}
.prog-card {
  padding: 26px 26px;
  border-right: 1px solid #e8eaed;
  border-bottom: 1px solid #e8eaed;
}
.prog-card:nth-child(2n) { border-right: none; }
.prog-card:nth-child(3), .prog-card:nth-child(4) { border-bottom: none; }
.prog-icon { font-size: 26px; margin-bottom: 12px; }
.ic-green { color: #0F6E56; } .ic-blue { color: #1967d2; }
.ic-amber { color: #b06000; } .ic-purple { color: #7b1fa2; }
.prog-name { font-size: 17px; font-weight: 700; color: #202124; margin-bottom: 2px; }
.prog-name-en { font-size: 11px; color: #9aa0a6; margin-bottom: 14px; }
.prog-row { font-size: 13px; color: #5f6368; line-height: 1.8; margin-bottom: 4px; }
.prog-row strong { color: #3c4043; font-weight: 600; }

/* ── Info grid 2col ── */
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid #e8eaed;
}
.info-cell {
  padding: 20px 32px;
  border-right: 1px solid #e8eaed;
  border-bottom: 1px solid #e8eaed;
}
.info-cell:nth-child(2n) { border-right: none; }
.info-cell:nth-last-child(-n+2) { border-bottom: none; }
.info-label { font-size: 10px; color: #1D9E75; font-weight: 700; margin-bottom: 5px; text-transform: uppercase; letter-spacing: .5px; }
.info-val { font-size: 14px; font-weight: 700; color: #202124; margin-bottom: 3px; }
.info-en { font-size: 11px; color: #9aa0a6; }

/* ── Tuition table ── */
.tuition-table {
  margin: 0;
  border-top: 1px solid #e8eaed;
}
.tuition-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  padding: 14px 32px;
  border-bottom: 1px solid #f1f3f4;
  font-size: 13px;
  color: #3c4043;
  gap: 8px;
}
.tuition-row:last-child { border-bottom: none; }
.tuition-row i { margin-right: 6px; color: #1D9E75; font-size: 15px; }
.tuition-header {
  background: #f8f9fa;
  font-size: 11px;
  font-weight: 700;
  color: #5f6368;
  text-transform: uppercase;
  letter-spacing: .4px;
  padding: 10px 32px;
}
.tuition-price {
  font-size: 18px;
  font-weight: 700;
  color: #0F6E56;
}
@media (max-width: 768px) {
  .tuition-row { padding: 14px 20px; }
  .tuition-header { padding: 10px 20px; }
}

/* ── Image placeholder ── */
.img-placeholder {
  background: #f8f9fa;
  padding: 72px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-top: 1px solid #e8eaed;
  color: #9aa0a6;
  text-align: center;
  font-size: 12px;
}
.img-placeholder i { font-size: 48px; }

/* ── Buttons ── */
.btn-area { padding: 20px 32px 28px; display: flex; gap: 12px; flex-wrap: wrap; border-top: 1px solid #e8eaed; }
.btn {
  padding: 11px 24px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: opacity .15s;
}
.btn:hover { opacity: 0.85; }
.btn-outline { border: 1.5px solid #1D9E75; color: #0F6E56; background: #fff; }
.btn-filled { background: #1D9E75; color: #fff; border: none; }

/* ── Calendar event list ── */
.event-list { padding: 4px 32px 24px; }
.event-row {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 13px 0;
  border-bottom: 1px solid #f1f3f4;
}
.event-row:last-child { border-bottom: none; }
.event-date { font-size: 11px; color: #9aa0a6; min-width: 86px; padding-top: 2px; }
.event-name { font-size: 13px; font-weight: 500; color: #202124; margin-bottom: 3px; }
.event-en { font-size: 11px; color: #5f6368; }

/* ── Timetable ── */
.timetable-wrap { padding: 18px 32px 28px; overflow-x: auto; }
table.tt { width: 100%; border-collapse: collapse; font-size: 13px; }
table.tt th {
  background: #0F6E56;
  color: #fff;
  padding: 12px 18px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
}
table.tt td {
  padding: 13px 18px;
  border-bottom: 1px solid #e8eaed;
  vertical-align: top;
  color: #3c4043;
}
table.tt tr:last-child td { border-bottom: none; }
table.tt tr:nth-child(even) td { background: #f8f9fa; }
.time-cell { color: #0F6E56; font-weight: 700; white-space: nowrap; }
.activity-en { font-size: 11px; color: #9aa0a6; margin-top: 3px; }
.pill {
  display: inline-block;
  font-size: 10px;
  padding: 2px 10px;
  border-radius: 20px;
  margin: 2px 2px 0 0;
  font-weight: 500;
}
.p-green  { background: #e6f4ea; color: #137333; }
.p-blue   { background: #e8f0fe; color: #1967d2; }
.p-amber  { background: #fef3e2; color: #b06000; }
.p-purple { background: #f3e8fd; color: #7b1fa2; }

/* ── Teacher card grid ── */
.teacher-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #e8eaed;
}
.teacher-card {
  padding: 24px;
  border-right: 1px solid #e8eaed;
  text-align: center;
}
.teacher-card:last-child { border-right: none; }
.teacher-card i { font-size: 36px; color: #9aa0a6; margin-bottom: 10px; display: block; }
.teacher-name { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.teacher-role { font-size: 12px; color: #5f6368; }

/* ── Footer ── */
.gs-footer {
  background: #085041;
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 0 0 8px 8px;
}
.gs-footer-text { font-size: 11px; color: rgba(255,255,255,0.65); line-height: 1.9; }
.gs-footer-icons { display: flex; gap: 16px; }
.gs-footer-icons a { font-size: 22px; color: rgba(255,255,255,0.65); transition: color .15s; }
.gs-footer-icons a:hover { color: #fff; }

/* ── Board of Directors grid ── */
.board-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid #e8eaed;
}
.board-card {
  padding: 20px;
  border-right: 1px solid #e8eaed;
  border-bottom: 1px solid #e8eaed;
  text-align: center;
}
.board-card:nth-child(3n) { border-right: none; }
.board-card:nth-last-child(-n+3) { border-bottom: none; }
.board-card i { font-size: 28px; color: #9aa0a6; margin-bottom: 8px; display: block; }
.board-name { font-size: 14px; font-weight: 700; margin-bottom: 3px; }
.board-role { font-size: 11px; color: #5f6368; }

@media (max-width: 768px) {
  .board-grid { grid-template-columns: repeat(2, 1fr); }
  .board-card:nth-child(3n) { border-right: 1px solid #e8eaed; }
  .board-card:nth-child(2n) { border-right: none; }
  .board-card:nth-last-child(-n+3) { border-bottom: 1px solid #e8eaed; }
  .board-card:nth-last-child(-n+2) { border-bottom: none; }
}
.gs-nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: #fff;
  font-size: 26px;
  line-height: 1;
}

/* ── Mobile dropdown menu ── */
.gs-nav-mobile {
  display: none;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: #085041;
  z-index: 99;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  flex-direction: column;
}
.gs-nav-mobile.open { display: flex; }
.gs-nav-mobile a {
  color: rgba(255,255,255,0.88);
  font-size: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background .1s;
}
.gs-nav-mobile a:hover { background: rgba(255,255,255,0.08); }
.gs-nav-mobile a.active { color: #fff; font-weight: 700; background: rgba(255,255,255,0.12); }
.gs-nav-mobile .mobile-social {
  display: flex;
  gap: 16px;
  padding: 14px 24px;
}
.gs-nav-mobile .mobile-social a {
  font-size: 22px;
  padding: 0;
  border-bottom: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .gs-nav { padding: 0 16px; position: relative; }
  .gs-nav-links { display: none; }
  .gs-nav-icons { display: none; }
  .gs-nav-hamburger { display: block; }
  .page-wrap { width: 95%; }
  .card-grid-3, .prog-grid, .info-grid, .teacher-grid { grid-template-columns: 1fr; }
  .card-cell, .prog-card, .info-cell, .teacher-card { border-right: none; }
  .img-text { grid-template-columns: 1fr; }
  .img-box { border-right: none; border-bottom: 1px solid #e8eaed; padding: 20px; flex-direction: row; gap: 14px; }
  .gs-hero { padding: 36px 20px; }
  .gs-hero h1 { font-size: 20px; }
  .notice-header { padding: 14px 20px; }
  .notice-body { margin: 0 20px; padding: 0 0 16px 0; }
  .sec-head { padding: 20px 20px 14px; }
  .sec-body { padding: 0 20px 20px; }
  .btn-area { padding: 16px 20px 20px; }
  .event-list { padding: 4px 20px 20px; }
  .timetable-wrap { padding: 16px 12px 20px; }
  .info-cell { padding: 16px 20px; }
  .tuition-row { padding: 14px 20px; }
  .tuition-header { padding: 10px 20px; }
  .gs-footer { flex-direction: column; gap: 14px; text-align: center; }
  .gs-footer-icons { justify-content: center; }
}