/* Google Fonts Import - Plus Jakarta Sans & Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* CSS variables for Theme Control */
:root {
  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Dark Theme variables (Vibrant Obsidian Violet) */
  --bg-primary: #07080e;
  --bg-secondary: rgba(18, 19, 29, 0.6);
  --card-bg: rgba(18, 19, 29, 0.55);
  --card-hover-bg: rgba(28, 29, 43, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-border: rgba(168, 85, 247, 0.35);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #a855f7;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-bg-glow: rgba(168, 85, 247, 0.16);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 12px 36px rgba(0, 0, 0, 0.35);
  --toast-bg: rgba(15, 16, 26, 0.9);
  --toast-border: rgba(255, 255, 255, 0.12);
  --scrollbar-track: #07080e;
  --scrollbar-thumb: rgba(255, 255, 255, 0.15);
}

[data-theme="light"] {
  /* Light Theme variables (Premium Soft Warm Gray) */
  --bg-primary: #f8f9fa;
  --bg-secondary: rgba(255, 255, 255, 0.8);
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-hover-bg: rgba(255, 255, 255, 0.95);
  --card-border: rgba(0, 0, 0, 0.08);
  --card-hover-border: rgba(124, 58, 237, 0.35);
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --accent-color: #6366f1;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
  --accent-bg-glow: rgba(99, 102, 241, 0.12);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 12px 36px rgba(124, 58, 237, 0.08);
  --toast-bg: rgba(255, 255, 255, 0.95);
  --toast-border: rgba(0, 0, 0, 0.08);
  --scrollbar-track: #f8f9fa;
  --scrollbar-thumb: rgba(0, 0, 0, 0.12);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 3rem 1.5rem;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  position: relative;
}

/* Glowing Ambient Blobs in background */
body::before {
  content: '';
  position: fixed;
  top: -15%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 65%);
  z-index: -2;
  pointer-events: none;
  filter: blur(100px);
}

body::after {
  content: '';
  position: fixed;
  bottom: -15%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.12) 0%, transparent 65%);
  z-index: -2;
  pointer-events: none;
  filter: blur(120px);
}

/* Wrapper / Container */
.copier-app {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

/* Header & Controls */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 2rem;
}

.brand-section h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.35rem;
}

.brand-section p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Theme Toggle Button */
.btn-theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.7rem 1.4rem;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

.btn-theme-toggle:hover {
  background: var(--card-hover-bg);
  border-color: var(--card-hover-border);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-bg-glow);
}

/* Main Navigation Tabs */
.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: var(--card-bg);
  padding: 0.5rem;
  border: 1px solid var(--card-border);
  border-radius: 20px;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.main-tab {
  flex: 1 1 160px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.95rem 1.25rem;
  font-family: var(--font-family);
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  text-decoration: none;
}

.main-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-1px);
}

.main-tab.active {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 8px 24px var(--accent-bg-glow);
}

.tab-main-icon {
  font-size: 1.15rem;
}

/* Tab Content Visibility */
.tab-content {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
}

.tab-content.active-content {
  display: flex;
  animation: fade-in-up 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Search Bar Area */
.search-container {
  position: relative;
  width: 100%;
}

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

.search-icon {
  position: absolute;
  left: 1.25rem;
  font-size: 1.1rem;
  color: var(--text-secondary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 1.25rem 1.25rem 1.25rem 3.25rem;
  font-size: 1.1rem;
  font-family: var(--font-family);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.search-input:focus {
  border-color: rgba(168, 85, 247, 0.45);
  box-shadow: 0 0 0 4px var(--accent-bg-glow), var(--shadow-md);
  background: var(--card-hover-bg);
}

.btn-clear-search {
  position: absolute;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.15rem;
  cursor: pointer;
  padding: 0.3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.btn-clear-search:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.1);
}

/* Category Tabs */
.category-tabs-container {
  width: 100%;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
}

.category-tabs {
  display: flex;
  gap: 0.75rem;
  min-width: max-content;
  padding: 0.25rem;
}

.category-tab {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.8rem 1.4rem;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-family);
  font-size: 0.92rem;
  font-weight: 700;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  backdrop-filter: blur(16px);
}

.category-tab:hover {
  background: var(--card-hover-bg);
  color: var(--text-primary);
  border-color: var(--card-hover-border);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.1);
}

.category-tab.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 6px 18px var(--accent-bg-glow);
  font-weight: 700;
  transform: translateY(-2px);
}

.category-tab.active .tab-icon {
  transform: scale(1.15);
}

@media (max-width: 768px) {
  .category-tabs-container {
    overflow-x: visible;
  }
  .category-tabs {
    flex-wrap: wrap;
    min-width: unset;
    justify-content: center;
    gap: 0.4rem;
  }
  .category-tab {
    padding: 0.5rem 0.85rem;
    font-size: 0.8rem;
    border-radius: 8px;
  }
}

/* Recent items section */
.recent-section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.recent-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.recent-items-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Character Cards Grid */
.characters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 0.65rem;
  width: 100%;
}

/* Character Card Style */
.char-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  height: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.char-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.char-glyph {
  font-size: 1.7rem;
  font-weight: 400;
  z-index: 2;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.char-name {
  display: none;
}

/* Tooltip overlay */
.char-tooltip {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  text-align: center;
  padding: 0.3rem 0;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 3;
  letter-spacing: 0.05em;
}

/* Hover States */
.char-card:hover {
  transform: translateY(-6px) scale(1.03);
  border-color: rgba(168, 85, 247, 0.5);
  box-shadow: 0 10px 25px -5px rgba(168, 85, 247, 0.25), 0 8px 16px -8px rgba(99, 102, 241, 0.2);
  background: var(--card-hover-bg);
}

.char-card:hover .char-glyph {
  transform: scale(1.15);
}

.char-card:hover .char-tooltip {
  transform: translateY(0);
}

/* Recent items variations */
.recent-card {
  height: 60px;
  width: 60px;
  border-radius: 12px;
  flex-direction: row;
}
.recent-card .char-glyph {
  font-size: 1.8rem;
}
.recent-card .char-name {
  display: none;
}
.recent-card:hover {
  transform: translateY(-2px);
}

/* ================= TAB 2: KAOMOJI GRID ================= */
.kaomoji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.85rem;
  width: 100%;
}

.kaomoji-card {
  height: 75px;
  padding: 0.5rem 1rem;
}

.kaomoji-card .char-glyph {
  font-size: 1.25rem;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

/* ================= TAB 3: FONT GENERATOR WORKSPACE ================= */
.font-generator-workspace {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

.input-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.input-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.font-input-textarea {
  width: 100%;
  height: 100px;
  padding: 1rem;
  font-family: var(--font-family);
  font-size: 1.1rem;
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  outline: none;
  resize: vertical;
  transition: all 0.3s ease;
}

.font-input-textarea:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-bg-glow);
}

.input-actions-info {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.fonts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  width: 100%;
}

.font-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.25s ease;
  overflow: hidden;
  min-height: 90px;
  justify-content: center;
}

.font-card-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-color);
  font-weight: 700;
  z-index: 2;
}

.font-card-value {
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--text-primary);
  z-index: 2;
  word-break: break-all;
  line-height: 1.3;
}

.font-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-color);
  box-shadow: 0 6px 15px var(--accent-bg-glow);
  background: var(--card-hover-bg);
}

.font-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 1;
}

.font-card:hover .font-card-value {
  color: var(--text-primary);
}

/* ================= TAB 4: ASCII ART GRID ================= */
.ascii-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  width: 100%;
}

.ascii-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.25rem;
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.ascii-glyph {
  font-family: "Courier New", Courier, monospace, var(--font-family);
  font-size: 0.82rem;
  line-height: 1.2;
  color: var(--text-primary);
  white-space: pre;
  text-align: left;
  z-index: 2;
  tab-size: 4;
}

.ascii-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
  box-shadow: 0 8px 20px var(--accent-bg-glow);
  background: var(--card-hover-bg);
}

/* Ripple/Pulse Click Animation Class */
.copied-pulse {
  animation: pulse-effect 0.4s ease-out;
}

@keyframes pulse-effect {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 var(--accent-color);
  }
  50% {
    transform: scale(0.95);
    box-shadow: 0 0 0 8px var(--accent-bg-glow);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 transparent;
  }
}

/* Animation on grid load */
.animate-in {
  animation: fade-in-up 0.3s ease-out forwards;
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Empty search state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  background: var(--card-bg);
  border-radius: 20px;
  border: 1px dashed var(--card-border);
}

.empty-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 1rem;
}

.empty-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.empty-subtext {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Toast Notification Styling */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 9999;
  max-width: 350px;
}

.toast {
  background: var(--toast-bg);
  border: 1px solid var(--toast-border);
  color: var(--text-primary);
  padding: 1rem 1.25rem;
  border-radius: 14px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slide-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  font-weight: 500;
  font-size: 0.92rem;
}

.toast-indicator {
  height: 8px;
  width: 8px;
  border-radius: 50%;
  background-color: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-color);
  flex-shrink: 0;
}

.toast-error .toast-indicator {
  background-color: #ff5e5b;
  box-shadow: 0 0 8px #ff5e5b;
}

.toast-fadeout {
  animation: fade-out 0.25s ease-in forwards;
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes fade-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(10px) scale(0.95);
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Responsive adjust */
@media (max-width: 768px) {
  body {
    padding: 1rem 0.5rem;
  }
  
  .copier-app {
    gap: 1.25rem;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

  .brand-section h1 {
    font-size: 1.6rem;
  }

  .main-nav {
    grid-template-columns: repeat(2, 1fr);
    border-radius: 12px;
  }
  
  .main-tab {
    padding: 0.65rem 0.25rem;
    font-size: 0.82rem;
  }

  .characters-grid {
    grid-template-columns: repeat(auto-fill, minmax(58px, 1fr));
    gap: 0.5rem;
  }

  .char-card {
    height: 60px;
  }
  
  .char-glyph {
    font-size: 1.45rem;
  }
  
  .char-name {
    font-size: 0.58rem;
  }

  .kaomoji-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.6rem;
  }

  .kaomoji-card {
    height: 65px;
  }

  .kaomoji-card .char-glyph {
    font-size: 1.05rem;
  }

  .fonts-grid {
    grid-template-columns: 1fr;
  }

  .ascii-grid {
    grid-template-columns: 1fr;
  }

  .toast-container {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    max-width: calc(100% - 2rem);
  }
}

/* ==========================================
   10. SEO GUIDE SECTION STYLING
   ========================================== */
.seo-guide-section {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.seo-guide-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 1rem auto;
}

.seo-guide-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.seo-guide-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.seo-block {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.seo-block:hover {
  border-color: var(--card-hover-border);
  box-shadow: var(--shadow-md);
  background: var(--card-hover-bg);
}

.seo-block h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.seo-block p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.seo-symbols-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

/* Copyable symbol card inside SEO section */
.seo-char-card {
  position: relative;
  width: 50px;
  height: 50px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.35rem;
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

[data-theme="light"] .seo-char-card {
  background: var(--card-bg);
}

.seo-char-card:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 20px var(--accent-bg-glow);
}

.seo-char-card .char-tooltip {
  display: none;
}

/* Blank block spacer styling */
.seo-blank-card {
  width: auto;
  padding: 0 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-color);
  background: var(--accent-bg-glow);
  border: 1px solid var(--card-border);
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  backdrop-filter: blur(8px);
}

.seo-blank-card:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 20px var(--accent-bg-glow);
}

@media (max-width: 768px) {
  .seo-grid {
    grid-template-columns: 1fr;
  }
  .seo-guide-header h2 {
    font-size: 1.5rem;
  }
}

/* Flexible text/kaomoji card inside SEO section */
.seo-text-card {
  position: relative;
  width: auto;
  min-width: 50px;
  height: 50px;
  padding: 0 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

[data-theme="light"] .seo-text-card {
  background: var(--card-bg);
}

.seo-text-card:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 8px 20px var(--accent-bg-glow);
}

/* Responsive multi-line ASCII Art card inside SEO section */
.seo-ascii-card {
  position: relative;
  flex: 1 1 calc(50% - 0.5rem);
  min-width: 250px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  min-height: 100px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

[data-theme="light"] .seo-ascii-card {
  background: var(--card-bg);
}

.seo-ascii-card:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 10px 25px var(--accent-bg-glow);
}

.seo-ascii-card pre {
  font-family: "Courier New", Courier, monospace, var(--font-family);
  font-size: 0.78rem;
  line-height: 1.25;
  color: inherit;
  white-space: pre;
  text-align: left;
  margin: 0;
}

/* SEO Sitemap Index styling */
.seo-index-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  width: 100%;
}

.seo-index-group {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem;
  backdrop-filter: blur(8px);
}

[data-theme="light"] .seo-index-group {
  background: rgba(0, 0, 0, 0.02);
}

.seo-index-group h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.seo-index-links {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.seo-index-link {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0;
}

.seo-index-link:hover {
  color: var(--accent-color);
  transform: translateX(4px);
}

/* Dynamic Card Explorer Viewport (for SPA page-in-page experience) */
.seo-explorer-viewport {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  width: 100%;
  max-width: 800px;
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 24px 24px 0 0;
  padding: 2rem;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
  z-index: 9999;
  backdrop-filter: blur(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  max-height: 80vh;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
}

.seo-explorer-viewport.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.seo-explorer-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.seo-explorer-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.seo-explorer-close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.2s ease;
  line-height: 1;
  padding-bottom: 3px;
}

.seo-explorer-close:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--accent-color);
}

.seo-explorer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.seo-explorer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Back overlay for explorer */
.seo-explorer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

/* Category Drawer Styles */
.category-tabs-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 0.85rem;
  border-radius: 16px;
  backdrop-filter: blur(12px);
  margin-bottom: 0.5rem;
}

.category-tabs-container {
  width: 100%;
  max-height: 52px;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-tabs-container.expanded {
  max-height: 600px;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap !important;
  min-width: unset !important;
  gap: 0.6rem;
}

.btn-toggle-categories {
  align-self: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--accent-cyan);
  padding: 0.5rem 1.25rem;
  border-radius: 10px;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
  margin-top: 0.25rem;
  outline: none;
}

.btn-toggle-categories:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(102, 252, 241, 0.2);
}

.btn-toggle-categories.active .arrow {
  transform: rotate(180deg);
}

.btn-toggle-categories.active {
  background: rgba(102, 252, 241, 0.1);
  border-color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .category-tabs-container {
    max-height: 42px; /* Slightly shorter on mobile */
    overflow-x: hidden !important;
    overflow-y: hidden !important;
  }
  .category-tabs-container.expanded {
    max-height: 1000px;
  }
}

/* SEO Instructions styles */
.seo-instructions-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
}

.seo-instructions-container h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.seo-instruction-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 1.5rem;
  border-radius: 14px;
}

.seo-instruction-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.seo-instruction-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.seo-instruction-card ul {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.seo-instruction-card li {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.seo-instruction-card strong {
  color: var(--text-primary);
}

/* Font size scaling for multi-character texts */
.char-card.long-text .char-glyph {
  font-size: 0.95rem !important;
  padding: 0 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 90%;
  text-align: center;
}
.char-card.extra-long-text .char-glyph {
  font-size: 0.75rem !important;
  padding: 0 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 95%;
  text-align: center;
}

/* Blank Space character indicator */
.blank-indicator {
  color: var(--text-secondary);
  border: 1px dashed var(--card-border);
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  font-size: 1.05rem;
  background: rgba(255, 255, 255, 0.03);
}
[data-theme="light"] .blank-indicator {
  background: rgba(0, 0, 0, 0.02);
}

/* Recent Copy Header Layout */
.recent-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}
.btn-clear-recent {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-clear-recent:hover {
  background: rgba(255, 59, 48, 0.1);
  color: #ff3b30;
  border-color: rgba(255, 59, 48, 0.2);
}

/* Copy Mode Selector (Apple Pill Design) */
.search-controls {
  display: flex;
  justify-content: center;
  margin-top: 0.75rem;
}
.mode-toggle-container {
  display: inline-flex;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 3px;
  border-radius: 9px;
  gap: 2px;
}
.mode-toggle-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-right: 0.5rem;
  margin-left: 0.5rem;
  font-weight: 500;
}
.btn-mode-toggle {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-mode-toggle:hover {
  color: var(--text-primary);
}
.btn-mode-toggle.active {
  background: var(--accent-color);
  color: #ffffff;
}

/* Floating Symbol Combiner Panel (Apple Design) */
.combiner-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(28, 28, 30, 0.85); /* Glassmorphic dark */
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem 1rem;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-theme="light"] .combiner-panel {
  background: rgba(255, 255, 255, 0.85); /* Glassmorphic light */
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.08);
}
.combiner-panel.visible {
  transform: translateY(0);
}
.combiner-body {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.combiner-input-wrapper {
  flex: 1;
}
.combiner-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 1rem;
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  resize: none;
  min-height: 42px;
  max-height: 120px;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s ease;
}
[data-theme="light"] .combiner-input {
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.08);
}
.combiner-input:focus {
  border-color: var(--accent-color);
}
.combiner-actions {
  display: flex;
  gap: 0.5rem;
}
.btn-combiner-action {
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  cursor: pointer;
  border: none;
  white-space: nowrap;
  transition: all 0.2s ease;
}
.btn-combiner-action.primary {
  background: var(--accent-color);
  color: #ffffff;
}
.btn-combiner-action.primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
.btn-combiner-action.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}
[data-theme="light"] .btn-combiner-action.secondary {
  background: rgba(0, 0, 0, 0.05);
}
.btn-combiner-action.secondary:hover {
  background: rgba(255, 59, 48, 0.15);
  color: #ff3b30;
}

/* Padding adjustment to avoid content overlapping with combiner panel */
body {
  transition: padding-bottom 0.3s ease;
}
body.has-combiner {
  padding-bottom: 75px;
}