/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, #FFF7ED 0%, #FFF5F5 50%, #F0F7FF 100%);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xl);
  margin-bottom: 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,154,139,0.06) 0%, transparent 60%);
  animation: pulse 10s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.05); opacity: 0.7; }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-icon {
  font-size: 2rem;
  margin-bottom: 0.375rem;
  display: inline-block;
  animation: bounce 3s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.hero-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.hero-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  max-width: 420px;
  margin: 0 auto 0.75rem;
}

/* ===== Hero Search ===== */
.hero-search {
  max-width: 480px;
  margin: 0 auto 0.625rem;
}

.hero-search .search-box {
  position: relative;
  display: flex;
}

.hero-search .search-input {
  flex: 1;
  padding: 0.6rem 1rem 0.6rem 2.25rem;
  border: 2px solid rgba(255,154,139,0.25);
  border-radius: 50px 0 0 50px;
  font-size: 0.9rem;
  background: white;
  transition: all 0.2s;
}

.hero-search .search-input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 154, 139, 0.12);
}

.hero-search .search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
}

.hero-search .search-btn {
  padding: 0.6rem 1.25rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border: none;
  border-radius: 0 50px 50px 0;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.hero-search .search-btn:hover {
  opacity: 0.9;
}

/* ===== Hero Quick Links ===== */
.hero-quick-links {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hero-quick-btn {
  padding: 0.3rem 0.75rem;
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.hero-quick-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

/* ===== Combined Filter Card ===== */
.filter-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.filter-divider {
  height: 1px;
  background: var(--border);
  margin: 0.625rem 0;
}

/* ===== Topics Section ===== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.875rem;
}

.topic-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
}

.topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.topic-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.topic-content {
  flex: 1;
  min-width: 0;
}

.topic-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topic-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Grade Section ===== */
.grade-section {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.grade-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.875rem;
}

.grade-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.grade-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.grade-icon.small { background: #FEF3C7; }
.grade-icon.middle { background: #DBEAFE; }
.grade-icon.large { background: #FCE7F3; }

/* ===== Tab Bar ===== */
.tab-bar {
  display: flex;
  gap: 0;
  background: var(--bg-white);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 0 1rem;
  box-shadow: var(--shadow-sm);
  border-bottom: 2px solid var(--border);
}

.tab-item {
  padding: 0.875rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tab-item:hover {
  color: var(--primary);
}

.tab-item.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-icon {
  font-size: 1rem;
}

.tab-content {
  display: none;
  background: var(--bg-white);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.tab-content.active {
  display: block;
}

.tab-panel {
  margin-bottom: 0;
}

/* ===== Info Cards ===== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.info-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.info-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.info-icon {
  font-size: 1.5rem;
  margin-bottom: 0.375rem;
}

.info-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.info-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* ===== Notice Box ===== */
.notice-box {
  background: linear-gradient(135deg, #FFFBEB, #FEF3C7);
  border: 1px solid #FDE68A;
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}

.notice-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.625rem;
}

.notice-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.375rem 1.5rem;
}

.notice-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.notice-item::before {
  content: '✓';
  color: var(--success);
  font-weight: bold;
  font-size: 0.75rem;
}

/* ===== Home Page Responsive ===== */
@media (max-width: 1024px) {
  .info-grid { grid-template-columns: repeat(3, 1fr); }
  .topic-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  /* Hero Section - compact for mobile */
  .hero {
    padding: 0.875rem 0.75rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-lg);
  }

  .hero-icon { font-size: 1.75rem; margin-bottom: 0.25rem; }
  .hero-title { font-size: 1rem; margin-bottom: 0.2rem; }
  .hero-subtitle { font-size: 0.7rem; max-width: 100%; margin-bottom: 0.625rem; }

  /* Hero Search - full width on mobile */
  .hero-search {
    max-width: 100%;
    margin-bottom: 0.5rem;
  }

  .hero-search .search-box {
    display: flex;
    width: 100%;
  }

  .hero-search .search-input {
    flex: 1;
    padding: 0.5rem 0.875rem 0.5rem 2rem;
    font-size: 0.875rem;
    border-radius: 50px 0 0 50px;
  }

  .hero-search .search-icon {
    left: 0.75rem;
    font-size: 0.9rem;
  }

  .hero-search .search-btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.8rem;
    border-radius: 0 50px 50px 0;
  }

  /* Hero Quick Links */
  .hero-quick-links {
    gap: 0.375rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.25rem;
  }

  .hero-quick-links::-webkit-scrollbar {
    display: none;
  }

  .hero-quick-btn {
    padding: 0.3rem 0.625rem;
    font-size: 0.75rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* Filter Card - compact with horizontal scroll */
  .filter-card {
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius);
  }

  /* Info Grid */
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .info-card {
    padding: 0.75rem 0.5rem;
  }

  .info-icon { font-size: 1.5rem; margin-bottom: 0.25rem; }
  .info-title { font-size: 0.75rem; }
  .info-desc { font-size: 0.65rem; }

  /* Notice Box */
  .notice-box {
    padding: 0.875rem 1rem;
    border-radius: var(--radius);
  }

  .notice-title { font-size: 0.8rem; margin-bottom: 0.5rem; }
  .notice-list { grid-template-columns: 1fr; gap: 0.3rem; }
  .notice-item { font-size: 0.75rem; }

  /* Topic Grid */
  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  /* Grade Section */
  .grade-section {
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius);
  }

  .grade-header { margin-bottom: 0.625rem; }
  .grade-title { font-size: 0.9rem; }
  .grade-icon { width: 22px; height: 22px; font-size: 0.8rem; }

  /* Tab Bar */
  .tab-bar {
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 0 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tab-bar::-webkit-scrollbar { display: none; }

  .tab-item {
    padding: 0.625rem 0.875rem;
    font-size: 0.8rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .tab-content {
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 0.75rem;
    margin-bottom: 0.75rem;
  }
}

@media (max-width: 480px) {
  /* Hero - ultra compact */
  .hero { padding: 0.75rem 0.625rem; }
  .hero-icon { font-size: 1.5rem; }
  .hero-title { font-size: 0.95rem; }
  .hero-subtitle { font-size: 0.65rem; }

  /* Hero Quick Links - show only 3 buttons */
  .hero-quick-btn:first-child { display: none; }

  /* Info Grid - 2 columns */
  .info-grid { grid-template-columns: repeat(2, 1fr); }

  /* Topic Grid - single column */
  .topic-grid { grid-template-columns: 1fr; }
}

/* ===== Hero Stats ===== */
.hero-stats-container {
  margin-top: 0.75rem;
  text-align: center;
}

.hero-stats {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #666;
  background: rgba(255,255,255,0.6);
  padding: 0.35rem 0.85rem;
  border-radius: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-stat-item strong {
  color: #FF6B35;
  font-weight: 600;
}

.hero-stat-sep {
  color: #ddd;
}