:root {
  --edu-blue: #003d7a;
  --edu-light: #0066cc;
  --edu-accent: #e8f4fd;
}
body { font-family: 'Noto Sans KR', sans-serif; background: #f4f6f9; }

/* ── Navbar ── */
.main-header.navbar {
  background: var(--edu-blue) !important;
  border-bottom: 3px solid var(--edu-light);
}
.main-header .navbar-brand {
  color: #fff !important;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.3px;
}
.main-header .navbar-brand .brand-edu { color: #7ec8f7; }
.navbar-nav .nav-link {
  color: rgba(255,255,255,0.85) !important;
  font-size: 0.88rem;
  padding: 0.5rem 0.9rem !important;
  border-radius: 4px;
  transition: background 0.15s;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  background: rgba(255,255,255,0.15) !important;
  color: #fff !important;
}
.navbar-nav .nav-link i { margin-right: 4px; }

/* ── Hero ── */
.hero-section {
  background: linear-gradient(135deg, var(--edu-blue) 0%, #0055aa 60%, #0080cc 100%);
  color: #fff;
  padding: 52px 0 44px;
  text-align: center;
}
.hero-section .eduroam-logo {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -1px;
}
.hero-section .eduroam-logo span { color: #7ec8f7; }
.hero-section .sub {
  font-size: 1rem;
  opacity: 0.85;
  margin-top: 6px;
}
.hero-section .hero-btn {
  margin-top: 22px;
  background: #fff;
  color: var(--edu-blue);
  border: none;
  border-radius: 24px;
  padding: 10px 32px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 3px 12px rgba(0,0,0,0.15);
  transition: transform 0.15s, box-shadow 0.15s;
  text-decoration: none;
  display: inline-block;
}
.hero-section .hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.2);
  color: var(--edu-blue);
  text-decoration: none;
}

/* ── Page Hero (sub pages) ── */
.page-hero {
  background: linear-gradient(135deg, var(--edu-blue) 0%, #0055aa 100%);
  color: #fff;
  padding: 36px 0 30px;
}
.page-hero h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 6px;
}
.page-hero .page-sub {
  font-size: 0.9rem;
  opacity: 0.8;
  margin: 0;
}

/* ── 퀵 카드 ── */
.quick-cards { margin-top: -28px; }
.quick-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  padding: 22px 16px;
  text-align: center;
  transition: transform 0.15s, box-shadow 0.15s;
  cursor: pointer;
  border-top: 3px solid var(--edu-light);
  text-decoration: none;
  display: block;
  color: inherit;
}
.quick-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  text-decoration: none;
  color: inherit;
}
.quick-card .icon { font-size: 1.9rem; color: var(--edu-light); margin-bottom: 10px; }
.quick-card .title { font-weight: 700; font-size: 0.9rem; color: #222; }
.quick-card .desc { font-size: 0.76rem; color: #888; margin-top: 4px; line-height: 1.4; }

/* ── 카드 공통 ── */
.card { border-radius: 8px; border: none; box-shadow: 0 1px 8px rgba(0,0,0,0.07); }
.card-header {
  background: #fff;
  border-bottom: 2px solid var(--edu-accent);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--edu-blue);
  padding: 12px 18px;
  border-radius: 8px 8px 0 0 !important;
}
.card-header i { margin-right: 6px; color: var(--edu-light); }

/* ── 공지 리스트 ── */
.notice-list { list-style: none; margin: 0; padding: 0; }
.notice-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 18px;
  font-size: 0.83rem;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: background 0.12s;
}
.notice-list li:last-child { border-bottom: none; }
.notice-list li:hover { background: var(--edu-accent); }
.notice-list .badge-new {
  background: var(--edu-light);
  color: #fff;
  font-size: 0.68rem;
  padding: 2px 7px;
  border-radius: 10px;
  margin-right: 6px;
}
.notice-list .date { color: #aaa; font-size: 0.75rem; flex-shrink: 0; margin-left: 8px; }

/* ── 도움말 리스트 ── */
.help-list { list-style: none; margin: 0; padding: 0; }
.help-list li {
  padding: 9px 18px;
  font-size: 0.83rem;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: background 0.12s;
}
.help-list li:last-child { border-bottom: none; }
.help-list li:hover { background: var(--edu-accent); }
.help-list li i { font-size: 0.7rem; color: #aaa; margin-right: 6px; }

/* ── 콘텐츠 섹션 ── */
.content-section { padding: 32px 0; }
.section-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 8px rgba(0,0,0,0.07);
  padding: 28px 32px;
  margin-bottom: 20px;
}
.section-card h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--edu-blue);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--edu-accent);
}
.section-card h2 i { margin-right: 8px; color: var(--edu-light); }
.step-list { list-style: none; padding: 0; margin: 0; }
.step-list li {
  display: flex;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid #f5f5f5;
  font-size: 0.88rem;
}
.step-list li:last-child { border-bottom: none; }
.step-num {
  background: var(--edu-light);
  color: #fff;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 12px;
  margin-top: 1px;
}
.os-tab .nav-link {
  color: #555 !important;
  font-size: 0.85rem;
  padding: 8px 18px !important;
  background: #f8f9fa;
  border-radius: 0 !important;
}
.os-tab .nav-link.active {
  background: var(--edu-blue) !important;
  color: #fff !important;
}
.faq-item {
  border-bottom: 1px solid #f0f0f0;
  padding: 14px 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--edu-blue);
  margin-bottom: 6px;
}
.faq-q i { margin-right: 6px; color: var(--edu-light); }
.faq-a {
  font-size: 0.83rem;
  color: #555;
  line-height: 1.6;
  padding-left: 22px;
}

/* ── Footer ── */
.main-footer {
  background: var(--edu-blue);
  color: rgba(255,255,255,0.6);
  font-size: 0.78rem;
  padding: 14px 24px;
  text-align: center;
}
.main-footer a { color: rgba(255,255,255,0.7); text-decoration: none; }
.main-footer a:hover { color: #fff; }
.main-footer .divider { margin: 0 8px; }