/* tabs.css - 프리미엄 세그먼트 컨트롤 스타일 (Linear Design) */

/* 메인 탭 컨테이너 - 세그먼트 컨트롤 스타일 */
.access-tabs {
  display: flex;
  /* Changed from inline-flex */
  justify-content: center;
  align-items: center;
  background: #F1F3F5;
  /* 밝은 회색 배경 */
  padding: 6px;
  border-radius: 9999px;
  /* 완전한 캡슐 형태 */
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.03);
  margin: 0 auto 40px;
  position: relative;
  flex-wrap: nowrap;
  gap: 0;
  border-bottom: none !important;
  /* 기존 하단 보더 제거 */
  max-width: fit-content;
  /* Changed from 800px to fit-content */
  width: auto;
}

/* 탭 버튼 - 캡슐 스타일 */
.tab-button {
  padding: 10px 32px;
  border: none;
  background: transparent;
  color: #868E96;
  /* 비활성 텍스트 색상 */
  border-radius: 9999px;
  /* 캡슐 형태 */
  font-family: "Inter Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
  overflow: visible;
  min-height: 44px;
  letter-spacing: -0.2px;
  white-space: nowrap;
  box-shadow: none;
  flex: 0 0 auto;
}

.tab-button::before {
  display: none;
  /* 기존 그라디언트 효과 제거 */
}

.tab-button:hover {
  color: var(--penguin-navy);
  background: rgba(255, 255, 255, 0.5);
  transform: none;
  box-shadow: none;
  border-color: transparent;
}

/* 활성 탭 - 강조 스타일 */
.tab-button.active {
  background: #FFFFFF;
  color: var(--penguin-navy);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  font-weight: 700;
  transform: scale(1.02);
}

/* 외부 링크 탭(강의) 클릭 피드백 */
.tab-button.link-clicked {
  background: #FFFFFF;
  color: var(--penguin-navy);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  font-weight: 700;
  transform: scale(1.02);
}

.tab-button.active:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 탭 콘텐츠 */
.tab-content {
  display: none;
  width: 100%;
  max-width: 100%;
  overflow-x: visible;
  /* 그림자 잘림 방지 */
  min-height: 400px;
  /* 콘텐츠 로드 전 깜빡임 방지 */
}

.tab-content.active {
  display: block;
  animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 서브탭 (문제풀기 등 내부 탭) - 더 작고 날렵한 디자인 */
.sub-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 4px;
}

.sub-tab-button:not(.admin-only),
.tag-search-link {
  padding: 10px 24px;
  border: 1px solid rgba(29, 47, 78, 0.1);
  background: #FFFFFF;
  color: var(--deep-sea-gray);
  border-radius: 9999px;
  /* 서브탭도 캡슐형 */
  font-family: "Inter Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  letter-spacing: -0.2px;
  transition: all 0.25s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
  min-height: 40px;
  /* 높이 통일 */
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sub-tab-button::before {
  display: none;
}

.sub-tab-button:hover,
.tag-search-link:hover {
  background: #F8F9FA;
  border-color: rgba(95, 178, 201, 0.5);
  color: var(--penguin-navy);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(95, 178, 201, 0.15);
}

.sub-tab-button.active {
  background: var(--penguin-navy);
  color: #FFFFFF;
  border-color: var(--penguin-navy);
  box-shadow: 0 4px 12px rgba(29, 47, 78, 0.2);
  transform: translateY(-1px);
}

.sub-tab-button.active:hover {
  background: var(--cert-primary-light, #2a4570);
  box-shadow: 0 6px 16px rgba(29, 47, 78, 0.25);
}


/* 학습분석 탭 내부 서브탭 콘텐츠 */
#analytics-tab .sub-tab-content {
  display: none;
}

#analytics-tab .sub-tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease-out;
}


/* ==========================================================================
   모바일 반응형 (Linear 모바일 UX 최적화)
   ========================================================================== */
@media (max-width: 768px) {
  .access-tabs {
    flex-wrap: nowrap;
    justify-content: center;
    overflow-x: visible;
    padding: 5px;
    margin: 0 16px 24px;
    width: calc(100% - 32px);
    max-width: calc(100% - 32px);
    background: #F1F3F5;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.03);
    border-radius: 20px;
    gap: 4px;
    scrollbar-width: none;
  }

  .access-tabs::-webkit-scrollbar {
    display: none;
  }

  .tab-button {
    background: #FFFFFF;
    border: 1px solid #E9ECEF;
    padding: 8px 4px;
    font-size: 13px;
    color: #495057;
    flex: 1 1 0;
    min-height: 36px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
    white-space: nowrap;
    overflow: visible;
    text-align: center;
  }

  .tab-button.active {
    background: var(--penguin-navy);
    color: #FFFFFF;
    border-color: var(--penguin-navy);
    box-shadow: 0 4px 10px rgba(29, 47, 78, 0.2);
  }

  .tab-button.link-clicked {
    background: var(--penguin-navy);
    color: #FFFFFF;
    border-color: var(--penguin-navy);
    box-shadow: 0 4px 10px rgba(29, 47, 78, 0.2);
  }

  /* 서브탭 모바일 */
  .sub-tabs {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 0 16px 8px;
    gap: 8px;
    margin-bottom: 24px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .sub-tabs::-webkit-scrollbar {
    display: none;
  }

  .sub-tab-button:not(.admin-only) {
    padding: 8px 16px;
    font-size: 13px;
    flex: 0 0 auto;
    min-height: 36px;
  }
}

@media (max-width: 480px) {
  .tab-button {
    padding: 7px 4px;
    font-size: 12px;
    min-height: 34px;
    flex: 1 1 0;
  }

  .access-tabs {
    margin: 0 12px 20px;
    width: calc(100% - 24px);
    max-width: calc(100% - 24px);
    padding: 4px;
    gap: 3px;
    justify-content: center;
  }
}

/* 로그인 필요 메시지 스타일 (유지) */
.login-required-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--penguin-navy);
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(29, 47, 78, 0.08);
  margin: 40px 0;
  min-height: 240px;
  gap: 24px;
  border: 1px solid rgba(29, 47, 78, 0.05);
}

.login-required-message .login-button {
  padding: 14px 32px;
  background: var(--penguin-navy);
  color: #FFFFFF;
  border: none;
  border-radius: 9999px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(29, 47, 78, 0.2);
}

.login-required-message .login-button:hover {
  background: var(--penguin-skyblue);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(95, 178, 201, 0.3);
}

.content-locked {
  opacity: 1;
  filter: none;
}