/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: var(--header-height);
  min-height: var(--header-height);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 28px;
  filter: drop-shadow(0 0 10px rgba(124, 92, 252, 0.6));
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 18px;
  padding: 4px;
  display: none;
}

.sidebar-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.sidebar-theme-toggle:hover {
  background: rgba(124, 92, 252, 0.1);
  color: var(--text-primary);
  border-color: var(--accent-purple);
}

/* 로그인/로그아웃 버튼 */
.sidebar-auth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 11px 16px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  background: linear-gradient(135deg, #4285f4, #34a853);
  color: #fff;
  border: none;
  box-shadow: 0 2px 12px rgba(66,133,244,0.3);
}
.sidebar-auth-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(66,133,244,0.4);
}
.sidebar-auth-btn.logout {
  background: transparent;
  color: #ef4444;
  border: 1px solid rgba(239,68,68,0.35);
  box-shadow: none;
}
.sidebar-auth-btn.logout:hover {
  background: rgba(239,68,68,0.08);
  border-color: rgba(239,68,68,0.6);
  transform: none;
  box-shadow: none;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px; /* Increased gap to make it look prettier without borders */
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
  border-radius: var(--radius-md);
}

.nav-item:hover {
  color: var(--text-primary);
  background: rgba(124, 92, 252, 0.1);
}

.nav-item.active {
  color: var(--text-primary);
  background: rgba(124, 92, 252, 0.15);
  box-shadow: inset 3px 0 0 var(--accent-purple);
}

.nav-item.active .nav-icon {
  filter: drop-shadow(0 0 6px rgba(124, 92, 252, 0.8));
}

.nav-icon { font-size: 20px; }
.nav-label { font-weight: 600; }

.sidebar-footer {
  padding: 16px 12px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
}

.user-level {
  font-size: 12px;
  color: var(--accent-gold);
}

/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: var(--header-height) 0 0;
  position: relative;
  z-index: 1;
}

/* ===== Header ===== */
.top-header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 50;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-date {
  font-size: 14px;
  color: var(--text-secondary);
}

.btn-add-sub {
  background: var(--gradient-primary);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.btn-add-sub:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 92, 252, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .right-column { flex-direction: row; }
  .upcoming-card, .chart-card { flex: 1; }
  .ai-score-card { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }
  .sidebar { transform: translateX(-240px); width: 240px; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: block; }
  .main-content { margin-left: 0; }
  .top-header { left: 0; padding: 0 20px; }
  .page { padding: 20px 16px 32px; }
  .stats-row { grid-template-columns: 1fr 1fr; gap: 12px; }
  .right-column { flex-direction: column; }
  .ai-alert-banner { flex-direction: column; gap: 12px; align-items: flex-start; }
  .cancel-service-content { flex-direction: column; text-align: center; }
  .affiliate-cards-list { grid-template-columns: 1fr; }
}

/* ===== Logo Clickable ===== */
.logo {
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin: -4px;
}
.logo:hover { opacity: 0.8; transform: scale(0.97); }
.logo:hover .logo-icon { filter: drop-shadow(0 0 14px rgba(124,92,252,0.9)); }

/* ===== Auto Discover Banner ===== */
.auto-discover-banner {
  background: linear-gradient(135deg, rgba(124,92,252,0.12), rgba(92,252,218,0.08));
  border: 1px solid rgba(124,92,252,0.25);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  cursor: pointer;
  transition: var(--transition);
}
.auto-discover-banner:hover { border-color: rgba(124,92,252,0.5); transform: translateY(-2px); }
.auto-discover-left { display: flex; align-items: center; gap: 12px; }
.auto-discover-icon { font-size: 24px; }
.auto-discover-title { font-size: 14px; font-weight: 700; color: var(--text-primary); }
.auto-discover-desc { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.auto-discover-arrow { font-size: 18px; color: var(--accent-purple); font-weight: 700; }

   모바일 반응형 + 라이트 테마 + 새 기능 UI
   ============================================================ */

/* ─────────────────── 테마 토글 버튼 ─────────────────── */
.sidebar-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  margin-bottom: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.sidebar-theme-toggle:hover {
  background: rgba(124, 92, 252, 0.1);
  color: var(--text-primary);
  border-color: var(--accent-purple);
}

/* 테마 전환 부드러운 효과 */
.theme-transitioning,
.theme-transitioning * {
  transition: background-color 0.3s ease, color 0.25s ease, border-color 0.25s ease !important;
}


/* ─────────────────── 모바일 하단 탭바 ─────────────────── */
.mobile-tab-bar {
  display: none; /* 기본: PC에서는 숨김 */
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  z-index: 1000;
  padding: 0 8px;
  padding-bottom: env(safe-area-inset-bottom);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
  align-items: center;
  justify-content: space-around;
}

.mobile-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 2px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  border-radius: 12px;
  transition: all 0.2s;
  color: var(--text-muted);
}

.mobile-tab.active {
  color: #8b5cf6;
}
.mobile-tab.active .mobile-tab-icon {
  filter: drop-shadow(0 0 6px rgba(139,92,246,0.5));
}

.mobile-tab-icon {
  font-size: 22px;
  line-height: 1;
}

.mobile-tab-label {
  font-size: 10px;
  font-weight: 600;
}

.mobile-tab.tab-center {
  background: var(--gradient-primary);
  border-radius: 50%;
  width: 52px;
  height: 52px;
  min-width: 52px;
  max-width: 52px;
  color: white;
  box-shadow: 0 4px 16px rgba(139,92,246,0.4);
  margin-bottom: 8px;
}
.mobile-tab.tab-center .mobile-tab-icon {
  font-size: 28px;
  font-weight: 300;
}

/* ─────────────────── 모바일 반응형 (768px 이하) ─────────────────── */
@media (max-width: 768px) {
  /* 사이드바 숨기기 */
  .sidebar { display: none !important; }

  /* 메인 콘텐츠 전체 너비 */
  .main-content { margin-left: 0 !important; padding-bottom: 80px; }

  /* 하단 탭바 표시 */
  .mobile-tab-bar { display: flex !important; }

  /* 상단 헤더 조정 */
  .top-header {
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 100;
  }
  .header-left h1 { font-size: 20px; }
  .header-left .page-subtitle { font-size: 12px; }
  .header-right { gap: 8px; }
  .btn-add-sub { padding: 8px 14px; font-size: 13px; }

  /* 통계 박스 2x2 그리드 */
  .stats-row {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px;
  }
  .stat-card { padding: 14px !important; }
  .stat-value { font-size: 18px !important; }

  /* 대시보드 그리드 단일 컬럼 */
  .dashboard-grid {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }
  .right-column { display: contents; }

  /* 구독 그리드 단일 컬럼 */
  .subs-grid {
    grid-template-columns: 1fr !important;
    gap: 12px;
  }

  /* 모달 전체 화면 */
  .modal-overlay .modal {
    width: 100% !important;
    max-width: 100% !important;
    height: 80vh;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 24px 24px 0 0 !important;
    margin: 0 !important;
    overflow-y: auto;
  }

  /* 구독CUT 1열 */
  .cutguide-twocol {
    grid-template-columns: 1fr !important;
  }

  /* 추천 서비스 */
  .affiliate-cards-list { flex-direction: column; }

  /* 도구 카드 */
  .share-calc-grid { grid-template-columns: 1fr; }
  .peer-bar-row { grid-template-columns: 80px 1fr 70px; }
  .export-buttons { flex-direction: column; }
  .btn-export { text-align: center; }

  /* AI 분석 */
  .ai-score-card {
    flex-direction: column !important;
    align-items: center;
  }

  /* 파티클 숨기기 (모바일 성능) */
  .particles { display: none; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr 1fr !important; }
  .stat-value { font-size: 16px !important; }
  .stat-label { font-size: 11px; }
  .stat-change { font-size: 10px; }
  .top-header { padding: 10px 12px; }
}