/* ====================================
   BTID Display - Claude/Anthropic Style
   ==================================== */

/* CSS Variables */
:root {
  --bg-primary: #FAF9F7;
  --bg-secondary: #F5F4F1;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FEFEFE;
  --text-primary: #1A1915;
  --text-secondary: #5C5B57;
  --text-muted: #8E8D89;
  --text-light: #B4B3AF;
  
  --primary: #C4704B;
  --primary-hover: #B5623D;
  --primary-light: rgba(196, 112, 75, 0.08);
  --primary-lighter: rgba(196, 112, 75, 0.04);
  
  --border-color: rgba(0, 0, 0, 0.06);
  --border-color-hover: rgba(0, 0, 0, 0.12);
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  
  --container-max: 1200px;
  --container-padding: 24px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ====================================
   Header
   ==================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  height: 65px;
}

.header-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  transition: var(--transition);
}

.navbar-brand:hover {
  opacity: 0.85;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.brand-subtitle {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.3;
}

.nav {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
  min-width: 90px;
  text-align: center;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--primary-light);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* ====================================
   Main Content
   ==================================== */
.main-content {
  flex: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px var(--container-padding) 60px;
  width: 100%;
}

/* ====================================
   Hero Section
   ==================================== */
.hero {
  text-align: center;
  margin-bottom: 32px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-xl);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

/* ====================================
   Search & Filter Section
   ==================================== */
.search-section {
  margin-bottom: 32px;
}

.search-container {
  position: relative;
  max-width: 360px;
  margin: 0 auto 16px;
}

.search-input {
  width: 100%;
  padding: 12px 44px 12px 16px;
  font-size: 14px;
  font-family: var(--font-sans);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-light);
}

.search-input:hover {
  border-color: var(--border-color-hover);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-lighter);
}

.search-icon {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-light);
  pointer-events: none;
}

.clear-search-btn {
  position: absolute;
  right: 38px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  padding: 0;
  background: var(--bg-secondary);
  border: none;
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-search-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.clear-search-btn svg {
  width: 12px;
  height: 12px;
}

/* Filter Buttons - Pill Style */
.filter-group {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 16px;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.filter-btn {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.5);
}

.filter-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.search-info {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Download Button */
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: var(--transition);
}

.download-btn:hover {
  background: var(--primary-hover);
}

.download-icon {
  width: 14px;
  height: 14px;
}

/* ====================================
   Tokens Grid
   ==================================== */
.tokens-section {
  margin-bottom: 32px;
}

.tokens-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

/* Token Card */
.token-card {
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.token-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.token-card.highlighted {
  border-color: var(--primary);
  background: var(--primary-lighter);
}

.token-name {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.token-name mark {
  background: var(--primary-light);
  color: var(--primary);
  padding: 1px 3px;
  border-radius: 3px;
}

/* Unused Card */
.token-card.unused-card {
  justify-content: flex-start;
  padding-top: 0;
}

.unused-card-top {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-hover) 100%);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.unused-card-top .token-name {
  color: #FFFFFF;
  font-size: 20px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.unused-card-top .token-name mark {
  background: rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  padding: 1px 3px;
  border-radius: 3px;
}

.unused-card-bottom {
  padding: 10px 12px;
  width: 100%;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.unused-tick {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.unused-inscription {
  font-size: 10px;
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* ====================================
   Loading & Empty States
   ==================================== */
.loading-state,
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 12px;
}

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

/* Skeleton Loading */
.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.skeleton-card {
  aspect-ratio: 1;
  background: linear-gradient(
    90deg,
    var(--bg-card) 0%,
    var(--bg-secondary) 50%,
    var(--bg-card) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-md);
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.hidden {
  display: none !important;
}

/* ====================================
   Pagination
   ==================================== */
.pagination-section {
  margin-bottom: 32px;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.page-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: var(--transition);
}

.page-btn:hover:not(:disabled) {
  border-color: var(--border-color-hover);
  color: var(--text-primary);
}

.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-ellipsis {
  color: var(--text-light);
  padding: 0 6px;
  font-size: 13px;
}

/* ====================================
   Footer
   ==================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 20px var(--container-padding);
}

.footer-content {
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
}

/* ====================================
   Responsive - Tablet
   ==================================== */
@media (max-width: 1024px) {
  .tokens-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
  
  .skeleton-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
  
  .hero-title {
    font-size: 28px;
  }
}

/* ====================================
   Responsive - Mobile
   ==================================== */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }
  
  .header {
    height: auto;
    min-height: 100px;
  }
  
  .header-content {
    flex-direction: column;
    gap: 12px;
    padding: 12px var(--container-padding);
    height: auto;
  }
  
  .brand-logo {
    width: 32px;
    height: 32px;
  }
  
  .brand-title {
    font-size: 13px;
  }
  
  .brand-subtitle {
    font-size: 10px;
  }
  
  /* Navigation buttons - larger */
  .nav {
    gap: 8px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: var(--radius-lg);
  }
  
  .nav-link {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    min-width: auto;
  }
  
  .nav-link.active {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
  }
  
  .main-content {
    padding: 20px var(--container-padding) 40px;
  }
  
  .hero {
    margin-bottom: 16px;
  }
  
  .hero-badge {
    padding: 5px 10px;
    font-size: 10px;
    margin-bottom: 8px;
  }
  
  .hero-title {
    font-size: 22px;
  }
  
  .search-section {
    margin-bottom: 16px;
  }
  
  /* Search box - smaller */
  .search-container {
    max-width: 280px;
    margin-bottom: 14px;
  }
  
  .search-input {
    padding: 10px 38px 10px 14px;
    font-size: 14px;
  }
  
  .search-icon {
    right: 12px;
    width: 14px;
    height: 14px;
  }
  
  .clear-search-btn {
    right: 32px;
    width: 20px;
    height: 20px;
  }
  
  .clear-search-btn svg {
    width: 10px;
    height: 10px;
  }
  
  /* Filter buttons - larger */
  .filter-group {
    gap: 4px;
    margin-bottom: 14px;
    padding: 4px;
  }
  
  .filter-btn {
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
  }
  
  .tokens-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }
  
  .skeleton-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }
  
  .token-card {
    border-radius: var(--radius-sm);
  }
  
  .token-name {
    font-size: 16px;
  }
  
  .unused-card-top .token-name {
    font-size: 14px;
  }
  
  .unused-card-bottom {
    padding: 8px 10px;
  }
  
  .unused-tick {
    font-size: 11px;
  }
  
  .unused-inscription {
    font-size: 9px;
  }
  
  .search-info {
    flex-direction: row;
    gap: 12px;
    font-size: 13px;
  }
  
  .download-btn {
    padding: 8px 14px;
    font-size: 12px;
  }
  
  .pagination {
    gap: 4px;
  }
  
  .page-btn {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-size: 12px;
  }
  
  .loading-state,
  .empty-state {
    padding: 40px 16px;
  }
}

/* ====================================
   Responsive - Small Mobile
   ==================================== */
@media (max-width: 480px) {
  :root {
    --container-padding: 12px;
  }
  
  .header {
    min-height: 95px;
  }
  
  .header-content {
    gap: 10px;
    padding: 10px var(--container-padding);
  }
  
  .navbar-brand {
    width: 100%;
    justify-content: center;
  }
  
  .brand-logo {
    width: 28px;
    height: 28px;
  }
  
  .brand-title {
    font-size: 12px;
  }
  
  /* Navigation buttons - small screen */
  .nav {
    width: 100%;
    justify-content: center;
    gap: 6px;
    padding: 3px;
  }
  
  .nav-link {
    padding: 9px 16px;
    font-size: 13px;
    flex: 1;
    text-align: center;
  }
  
  .hero-title {
    font-size: 20px;
  }
  
  /* Search box - small screen */
  .search-container {
    max-width: 240px;
  }
  
  .search-input {
    padding: 9px 34px 9px 12px;
    font-size: 13px;
  }
  
  /* Filter buttons - small screen */
  .filter-group {
    padding: 3px;
  }
  
  .filter-btn {
    padding: 8px 14px;
    font-size: 13px;
  }
  
  .tokens-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }
  
  .skeleton-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }
  
  .token-name {
    font-size: 14px;
  }
  
  .unused-card-top .token-name {
    font-size: 12px;
  }
  
  .unused-card-bottom {
    padding: 6px 8px;
  }
  
  .unused-tick {
    font-size: 10px;
  }
  
  .unused-inscription {
    font-size: 8px;
  }
  
  .page-btn {
    min-width: 28px;
    height: 28px;
    font-size: 11px;
  }
}

/* ====================================
   Focus States
   ==================================== */
.nav-link:focus-visible,
.token-card:focus-visible,
.page-btn:focus-visible,
.download-btn:focus-visible,
.filter-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}