/* ==========================================================================
   KPOP PHOTOWALL — MAIN STYLES
   Crafted by National Design Studio
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--duration-normal) var(--ease-smooth),
              color var(--duration-normal) var(--ease-smooth);
  overflow-x: hidden;
}

/* Background Atmospheric Gradient */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle at 15% 10%, rgba(255, 46, 99, 0.05) 0%, transparent 45%),
              radial-gradient(circle at 85% 30%, rgba(121, 40, 202, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 50% 85%, rgba(0, 180, 216, 0.04) 0%, transparent 60%);
  transition: opacity var(--duration-normal);
}

[data-theme="dark"] body::before {
  background: radial-gradient(circle at 20% 15%, rgba(255, 51, 102, 0.12) 0%, transparent 50%),
              radial-gradient(circle at 80% 25%, rgba(157, 78, 221, 0.14) 0%, transparent 55%),
              radial-gradient(circle at 50% 90%, rgba(0, 245, 212, 0.08) 0%, transparent 60%);
}

/* Container */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* ==========================================================================
   NAVIGATION BAR (Glassmorphism & Airbnb / Apple Tactility)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--duration-normal), border-color var(--duration-normal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: var(--space-md);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: inherit;
}

.brand-logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #FFFFFF;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 14px rgba(255, 46, 99, 0.35);
  transition: transform var(--duration-fast) var(--ease-spring);
}

.brand-group:hover .brand-logo-mark {
  transform: scale(1.06) rotate(-3deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-edition-tag {
  font-size: 0.65rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.8px;
  padding: 2px 6px;
  background-color: var(--accent-primary);
  color: #FFFFFF;
  border-radius: var(--radius-xs);
  vertical-align: middle;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Control Buttons */
.icon-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-card);
}

.icon-btn:active {
  transform: translateY(0);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
  transition: stroke var(--duration-fast);
}

/* Primary Action Button (Create Your Photocard) */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #FFFFFF;
  border: none;
  padding: 0 var(--space-lg);
  height: 42px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  box-shadow: 0 4px 16px rgba(255, 46, 99, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 46, 99, 0.45);
  filter: brightness(1.06);
}

.btn-primary:active {
  transform: translateY(0);
}

/* View Switcher Pills */
.view-switcher {
  display: flex;
  background: var(--bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  gap: 2px;
}

.view-btn {
  background: transparent;
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.view-btn svg {
  width: 16px;
  height: 16px;
}

.view-btn.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   HERO EDITORIAL SECTION
   ========================================================================== */
.hero-section {
  padding: var(--space-3xl) 0 var(--space-xl);
  position: relative;
}

.hero-curation-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
}

.hero-curation-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 46, 99, 0.7); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 8px rgba(255, 46, 99, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 46, 99, 0); }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--space-2xl);
}

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.hero-title-group h1 {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 0.98;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}

.hero-title-group h1 .accent-italic {
  font-family: var(--font-serif);
  font-weight: 400;
  font-style: italic;
  text-transform: none;
  background: linear-gradient(120deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding-right: 6px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.6;
  font-weight: 400;
}

.hero-stats-panel {
  display: flex;
  gap: var(--space-lg);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.hero-stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-tertiary);
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   FILTER & CURATION BAR
   ========================================================================== */
.curation-toolbar {
  position: sticky;
  top: 74px;
  z-index: 90;
  background: var(--bg-glass-heavy);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-2xl);
  transition: background-color var(--duration-normal);
}

.toolbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Category Filter Chips */
.filter-chips {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.filter-chips::-webkit-scrollbar {
  display: none;
}

.filter-chip {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.filter-chip:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.filter-chip.active {
  background: var(--text-primary);
  color: var(--bg-secondary);
  border-color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Search & Selector Box */
.toolbar-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-tertiary);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.search-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 16px 8px 40px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  outline: none;
  width: 220px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.search-input:focus {
  width: 280px;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(255, 46, 99, 0.15);
}

.group-select {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: border-color var(--duration-fast);
}

.group-select:focus {
  border-color: var(--accent-primary);
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  padding: var(--space-3xl) 0 var(--space-2xl);
  transition: background-color var(--duration-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.footer-bio h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-bio p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 480px;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.team-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.team-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color var(--duration-fast);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-spring);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}