@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Noto+Sans+KR:wght@300;400;500;700;900&display=swap');

:root {
  /* 브랜드 테마 컬러 (네온 그린) */
  --color-primary: #12cf66;
  --color-primary-hover: #0fb257;
  --color-accent: #22e376;
  
  /* 색상 토큰 */
  --bg-app: #f4f5f8;
  --bg-surface: #ffffff;
  --text-main: #1c1c1e;
  --text-muted: #6e6e73;
  --text-dim: #aeaeae;
  --border-color: #ededef;
  
  /* 그림자 & 라운드 코너 */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 6px;
  --radius-full: 9999px;
  
  /* 타이포그래피 */
  --font-sans: 'Outfit', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* --- 리셋 & 전역 선언 --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

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

/* --- 모바일 프레임 컨테이너 --- */
.app-container {
  width: 100%;
  max-width: 600px; /* 데스크톱에서 모바일 뷰 고정 */
  background-color: var(--bg-surface);
  min-height: 100vh;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: clip;
}

/* 데스크톱 모니터 대응 상하 여백 */
@media (min-width: 601px) {
  body {
    padding: 1.5rem 0;
  }
  .app-container {
    min-height: calc(100vh - 3rem);
    border-radius: 24px;
    border: 1px solid rgba(0, 0, 0, 0.04);
  }
}

/* --- 헤더 영역 --- */
.app-header {
  background-color: #12cf66; /* logo_cradio.png 배경색과 동일하게 일치 */
  padding: 1.8rem 1.5rem;
  text-align: center;
  position: relative;
  border-bottom-left-radius: 24px;
  border-bottom-right-radius: 24px;
  box-shadow: 0 10px 30px rgba(18, 207, 102, 0.18);
}

.header-main-logo {
  height: 68px;
  width: auto;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.header-main-logo:hover {
  transform: scale(1.08) rotate(2deg);
}

.header-logo-text {
  font-size: 0.82rem;
  color: #111827;
  font-weight: 700;
  margin-top: 0.65rem;
  letter-spacing: -0.3px;
  opacity: 0.85;
}

/* --- 채널 목록 영역 --- */
.channel-section {
  padding: 2rem 1.25rem;
  flex-grow: 1;
  background-color: #fafafc;
}

.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.25rem;
  letter-spacing: -0.3px;
  padding-left: 0.25rem;
}

.channel-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

/* 개별 채널 카드 */
.channel-card {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 0.82rem 0.9rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.02);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;

  /* CSS 변수를 활용한 각 채널 테마 색상 (JS에서 인라인으로 바인딩) */
  --channel-primary: var(--channel-color-primary, #12cf66);
  --channel-primary-hover: var(--channel-color-primary-hover, #0fb257);
  --channel-primary-rgb: var(--channel-color-primary-rgb, 18, 207, 102);
}

.channel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--channel-primary-rgb), 0.3);
}

.channel-card:active {
  transform: translateY(-1px) scale(0.985);
  box-shadow: var(--shadow-sm);
}

/* 로고 이미지 래퍼 */
.channel-logo-wrapper {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background-color: #fafafa;
  border: 1px solid rgba(0, 0, 0, 0.05);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 0.85rem;
  transition: all 0.2s ease;
}

.channel-card:hover .channel-logo-wrapper {
  background-color: #ffffff;
  border-color: rgba(var(--channel-primary-rgb), 0.4);
}

.channel-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

/* 채널 정보 텍스트 */
.channel-info {
  flex-grow: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.channel-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.4px;
}

.channel-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.35;
  word-break: keep-all;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* 카드 하단 메타/액션 영역 */
.channel-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.2rem;
}

.channel-badge {
  background-color: rgba(var(--channel-primary-rgb), 0.05);
  color: var(--channel-primary);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
  border: 1px solid rgba(var(--channel-primary-rgb), 0.12);
  display: inline-block;
}

.channel-action {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--channel-primary);
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.channel-action .arrow {
  transition: transform 0.2s ease;
  font-weight: 400;
}

.channel-card:hover .channel-action .arrow {
  transform: translateX(4px);
}

/* --- 푸터 영역 --- */
.app-footer {
  padding: 1.8rem 1rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-text {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* 로딩 플레이스홀더 및 스피너 */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 0;
  gap: 0.8rem;
  color: var(--text-muted);
  width: 100%;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(18, 207, 102, 0.1);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}