/* ============================================================
   디자인 보강 (학생용 페이지) - v13
   다크모드 완전 차단 (브라우저 자동 다크모드 무력화)
   ============================================================ */
html {
  color-scheme: light only !important;
}
html, body {
  background-color: #ffffff !important;
  color: #1a1a1a !important;
}

:root {
  color-scheme: light only;
  --color-bg-subtle: #f7f5f0;
  --color-bg-section: #faf8f3;
  --color-accent: #c8a96a;
  --color-primary-soft: #1e4670;
  --color-border: #e8e4dc;
  --shadow-sm: 0 1px 3px rgba(10, 37, 64, 0.05);
  --shadow-md: 0 4px 14px rgba(10, 37, 64, 0.07);
  --shadow-lg: 0 8px 28px rgba(10, 37, 64, 0.09);
}

/* ---------- 헤더 로고 ---------- */
.site-logo {
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.55rem !important;
  text-decoration: none;
}
.site-logo .logo-img {
  height: 38px;
  width: auto;
  display: block;
}
.site-logo .logo-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1;
}
@media (max-width: 768px) {
  .site-logo .logo-img { height: 32px; }
  .site-logo .logo-text { font-size: 1rem; }
}

/* ---------- 히어로 ---------- */
.hero {
  background: linear-gradient(180deg, #faf8f3 0%, #ffffff 100%);
}
.site-header {
  box-shadow: var(--shadow-sm);
  background: #ffffff;
}

/* ★ 한글 단어 단위 줄바꿈 (lead 텍스트 + subtitle) */
.hero .lead,
.page-header .subtitle,
.hero h1 {
  word-break: keep-all;
}

/* ★ 트러스트 배지 - 단독 줄로 표시 (block 레벨 flex) */
.trust-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
  font-size: 0.88rem;
  background: rgba(10, 37, 64, 0.06);
  padding: 0.45rem 0.9rem;
  border-radius: 20px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 1rem;
  border: 1px solid rgba(10, 37, 64, 0.1);
}
.trust-badge svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}

body > section:nth-of-type(odd):not(.hero) {
  background: var(--color-bg-section);
}

section h2 {
  position: relative;
  padding-left: 0.875rem;
  margin-bottom: 1.25rem;
}
section h2::before {
  content: '';
  position: absolute;
  left: 0; top: 0.1em; bottom: 0.1em;
  width: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* ---------- 카드 ---------- */
.card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card .meta { color: var(--color-text-muted); }
.card .tag {
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 600;
}
.card-action {
  color: var(--color-primary);
  font-weight: 600;
}

.subject-box {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.subject-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-primary);
}
.subject-label {
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

/* ---------- 버튼 ---------- */
.btn {
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}
.btn:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-outline {
  background: #ffffff;
}

/* ---------- 푸터 ---------- */
.site-footer {
  background: var(--color-primary);
  color: #c8d2db;
}
.site-footer h4 { color: #ffffff; }
.site-footer p, .site-footer ul { color: #a8b8c8; }
.site-footer a {
  color: #c8d2db;
  text-decoration: none;
}
.site-footer a:hover { color: #ffffff; }
.site-footer .footer-logo {
  height: 38px;
  width: auto;
  display: block;
  margin-bottom: 0.6rem;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
.site-footer .copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #8aa0b5;
  padding-top: 1.5rem;
  margin-top: 2rem;
}
.site-footer .copyright a {
  border-color: rgba(255, 255, 255, 0.25) !important;
  color: #c8d2db !important;
}
.site-footer .copyright a:hover {
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.5) !important;
}

/* ---------- schedule-table ---------- */
.schedule-table {
  background: #ffffff;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.schedule-table thead { background: var(--color-bg-subtle); }
.schedule-table th {
  font-weight: 600;
  color: var(--color-primary);
}
.schedule-table tbody tr {
  transition: background 0.15s ease;
}
.schedule-table tbody tr:hover {
  background: var(--color-bg-subtle);
}

/* ============================================================
   모바일 hero
   ============================================================ */
@media (max-width: 768px) {
  .hero {
    padding: 2rem 0 !important;
    overflow: visible !important;
  }
  .hero .container { padding: 0 1rem; }

  .hero-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 1.5rem !important;
    width: 100% !important;
    grid-template-columns: 1fr !important;
  }
  .hero-text, .hero-graphic {
    width: 100% !important;
    max-width: 100% !important;
    flex: none !important;
    position: relative !important;
    float: none !important;
    top: auto !important;
    right: auto !important;
    left: auto !important;
    height: auto !important;
  }
  .hero-graphic .login-hero-card {
    max-width: 100% !important;
    margin: 0 !important;
  }
  .hero h1 { font-size: 1.85rem !important; line-height: 1.2 !important; }
  .hero .lead { font-size: 1rem !important; }
  .hero-cta-group { flex-wrap: wrap; gap: 0.5rem; }
}

/* ---------- 빠른 메뉴 ---------- */
.quick-menu { padding: 2rem 0 !important; }
.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.quick-item {
  display: block;
  text-align: center;
  padding: 1.75rem 1rem;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.quick-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.quick-icon {
  width: 48px; height: 48px;
  margin: 0 auto 0.75rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.quick-icon svg { width: 100%; height: 100%; }
.quick-item h4 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin: 0 0 0.25rem;
}
.quick-item p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}
@media (max-width: 768px) {
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 강사 소개 섹션 ---------- */
.instructor-intro { padding: 3.5rem 0 !important; }
.instructor-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: center;
}
.instructor-photo {
  background: linear-gradient(180deg, var(--color-bg-subtle), #ffffff);
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  box-shadow: var(--shadow-md);
}
.instructor-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.instructor-text .eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  font-weight: 700;
}
.instructor-text h2 {
  font-size: 1.75rem;
  margin: 0.5rem 0 1rem;
  padding-left: 0 !important;
}
.instructor-text h2::before { display: none !important; }
.instructor-text .role {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.instructor-text p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
  color: var(--color-text);
  word-break: keep-all;
}
@media (max-width: 768px) {
  .instructor-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .instructor-photo { max-width: 240px; margin: 0 auto; aspect-ratio: 4 / 5; }
  .instructor-text { text-align: center; }
}

/* ---------- 학생 후기 ---------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.testimonial-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.testimonial-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.testimonial-photo {
  height: 180px;
  background: var(--color-bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-bottom: 1px solid var(--color-border);
  background-size: cover;
  background-position: center;
}
.testimonial-card blockquote {
  padding: 1.5rem 1.5rem 0.5rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text);
  font-style: italic;
  border: none;
  margin: 0;
  flex-grow: 1;
  word-break: keep-all;
}
.testimonial-card cite {
  display: block;
  padding: 0.5rem 1.5rem 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: 500;
}
@media (max-width: 768px) {
  .testimonial-grid { grid-template-columns: 1fr; }
}

/* ---------- 학습자료실 필터 탭 ---------- */
.filter-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
  overflow-x: auto;
}
.filter-tab {
  padding: 0.7rem 1.25rem;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
  margin-bottom: -1px;
}
.filter-tab:hover { color: var(--color-text); }
.filter-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

/* ---------- 학습자료 카드 ---------- */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.material-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.2s;
  text-decoration: none;
  color: inherit;
}
.material-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.material-card .category-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}
.material-card h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}
.material-card .desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0 0 1rem;
  flex-grow: 1;
}
.material-card .open-link {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
}