/* ==========================================================================
   LEGO School - Global Styling & CSS Tokens
   Matching attached screenshot aesthetic (Dark mode, Vibrant accents, Premium cards)
   ========================================================================== */

:root {
  --bg-color: #0c0c0e;
  --bg-secondary: #14141a;
  --card-bg: #191921;
  --card-hover-bg: #20202b;
  --card-border: #282836;
  
  --primary-red: #e3000b;
  --primary-red-hover: #ff1a25;
  --accent-blue: #3b62d1;
  --accent-blue-hover: #4e75eb;
  --accent-yellow: #f5c518;
  
  --text-main: #f0f0f5;
  --text-muted: #9e9ea8;
  --text-dim: #6c6c7d;
  
  --font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 9999px;
  
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(227, 0, 11, 0.15);
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Mode Overrides */
body.light-theme {
  --bg-color: #f4f5f8;
  --bg-secondary: #ffffff;
  --card-bg: #ffffff;
  --card-hover-bg: #f8f9fc;
  --card-border: #e2e4ed;
  --text-main: #14141a;
  --text-muted: #5e606e;
  --text-dim: #8e909e;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 12px 30px rgba(0, 0, 0, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --------------------------------------------------------------------------
   1. Header Navigation
   -------------------------------------------------------------------------- */
.main-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Logo Badge */
.logo-area {
  cursor: pointer;
  user-select: none;
}

.logo-badge {
  background-color: var(--primary-red);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 12px rgba(227, 0, 11, 0.3);
  transition: var(--transition);
}

.logo-badge:hover {
  transform: translateY(-1px);
  background-color: var(--primary-red-hover);
}

.logo-sub {
  font-weight: 400;
  font-size: 1rem;
  opacity: 0.95;
}

/* Home Badge Button */
.home-badge-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  transition: var(--transition);
  white-space: nowrap;
}

.home-badge-btn:hover {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(227, 0, 11, 0.3);
}

/* Nav Menu Tabs */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 0;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

.nav-menu::-webkit-scrollbar {
  display: none; /* Hide Chrome/Safari scrollbar */
  width: 0;
  height: 0;
}

.nav-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: var(--transition);
  position: relative;
  text-decoration: none;
}

.nav-tab.home-tab {
  color: var(--accent-yellow);
}

.nav-tab.home-tab:hover {
  background-color: rgba(245, 197, 24, 0.15);
  color: #ffffff;
}

.nav-tab:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-tab.active {
  color: var(--text-main);
}

.nav-tab.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 14px;
  right: 14px;
  height: 3px;
  background-color: var(--accent-yellow);
  border-radius: 2px;
}

/* Utility Bar */
.utility-bar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stat-pill {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

.icon-btn {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.icon-btn:hover {
  background-color: rgba(255, 255, 255, 0.12);
  transform: scale(1.05);
}

.dice-btn {
  background-color: rgba(227, 0, 11, 0.2);
  border-color: rgba(227, 0, 11, 0.4);
}

.dice-btn:hover {
  background-color: var(--primary-red);
  color: #fff;
}

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  font-weight: bold;
}

.lang-btn.active {
  color: #ffffff;
  background-color: var(--accent-blue);
  border-radius: 4px;
  padding: 2px 6px;
}

.lang-divider {
  color: var(--text-dim);
  margin: 0 2px;
}

/* --------------------------------------------------------------------------
   2. Facts Ticker Bar
   -------------------------------------------------------------------------- */
.ticker-section {
  background-color: #060608;
  border-bottom: 1px solid var(--card-border);
  overflow: hidden;
  padding: 8px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.ticker-wrapper {
  max-width: 1440px;
  margin: 0 auto;
  white-space: nowrap;
  overflow: hidden;
}

.ticker-content {
  display: inline-block;
  animation: tickerSlide 35s linear infinite;
  padding-left: 100%;
}

.ticker-content:hover {
  animation-play-state: paused;
}

.ticker-item {
  display: inline-block;
  margin-right: 12px;
}

.ticker-divider {
  color: var(--primary-red);
  margin-right: 12px;
  font-weight: bold;
}

@keyframes tickerSlide {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-100%, 0, 0); }
}

/* --------------------------------------------------------------------------
   3. Main Content & Hero Title
   -------------------------------------------------------------------------- */
.main-content {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 60px;
  flex: 1;
}

.hero-header {
  text-align: center;
  margin-bottom: 32px;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;

}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   4. Search & Filters Toolbar
   -------------------------------------------------------------------------- */
.filter-section {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.search-box-wrapper {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  opacity: 0.6;
}

#search-input {
  width: 100%;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 14px 44px 14px 48px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-family: var(--font-family);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: var(--transition);
}

#search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 98, 209, 0.25);
}

.clear-search-btn {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
}

/* Extended Filters Drawer */
.extended-filters {
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.filter-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.theme-chips-scroll {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.theme-chip {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.theme-chip:hover, .theme-chip.active {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
}

.year-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.year-chip {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.year-chip:hover, .year-chip.active {
  background-color: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

.range-slider-wrapper {
  display: flex;
  gap: 16px;
  align-items: center;
}

.range-slider-wrapper input[type="range"] {
  flex: 1;
  accent-color: var(--accent-blue);
}

/* --------------------------------------------------------------------------
   5. Card Grid Layout (Exact Screenshot Match)
   -------------------------------------------------------------------------- */
.sets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* LEGO Set Card */
.lego-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.lego-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(227, 0, 11, 0.4);
}

/* Red Badge Top Right */
.card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: var(--primary-red);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  z-index: 2;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

/* Card Image Area */
.card-img-wrapper {
  width: 100%;
  height: 240px;
  background-color: #121217;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  position: relative;
  overflow: hidden;
}

.card-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.lego-card:hover .card-img {
  transform: scale(1.06);
}

/* Card Info Body */
.card-info {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 2.7rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
}

.meta-piece {
  display: flex;
  align-items: center;
  gap: 4px;
}

.meta-price {
  color: var(--text-main);
  font-weight: 700;
}

/* Blue Action Button: LEGO.com에서 보기 */
.card-action-btn {
  margin-top: auto;
  width: 100%;
  background-color: var(--accent-blue);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-pill);
  padding: 12px 16px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition);
  text-decoration: none;
}

.card-action-btn:hover {
  background-color: var(--accent-blue-hover);
  box-shadow: 0 4px 14px rgba(59, 98, 209, 0.4);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   6. Empty State & Load More
   -------------------------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--card-border);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.3rem;
  margin-bottom: 6px;
}

.empty-state p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.btn-reset {
  background-color: var(--primary-red);
  color: #fff;
  border: none;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  cursor: pointer;
}

.load-more-wrapper {
  text-align: center;
  margin-top: 40px;
}

.btn-load-more {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 12px 32px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition);
}

.btn-load-more:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-blue);
}

/* --------------------------------------------------------------------------
   7. Modals
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 28px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.8);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-main);
}

/* Detailed View inside Modal */
.modal-detail-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.modal-img-wrapper {
  background-color: #121217;
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.modal-img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.modal-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.spec-item {
  background-color: rgba(255, 255, 255, 0.04);
  padding: 10px;
  border-radius: var(--radius-sm);
}

.spec-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.spec-val {
  font-size: 1.05rem;
  font-weight: 700;
}

/* API Config Modal Input */
.api-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 12px 0 20px;
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.input-group input {
  width: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
}

.api-modal-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn-secondary {
  background-color: var(--accent-blue);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  cursor: pointer;
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  text-decoration: underline;
}

/* Footer */
.main-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--card-border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.disclaimer {
  color: var(--text-dim);
  font-size: 0.75rem;
  margin-top: 4px;
}

/* Mobile Responsiveness */
@media (max-width: 900px) {
  .header-container {
    flex-wrap: wrap;
  }
  .nav-menu {
    order: 3;
    width: 100%;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .sets-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}