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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0d1117;
  color: #e6edf3;
  min-height: 100vh;
  padding: 2.5rem 1rem 4rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #f0f6fc;
  letter-spacing: -0.5px;
  margin-bottom: 0.4rem;
}

.subtitle {
  color: #8b949e;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.emoji-counter {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: #58a6ff;
  background: rgba(56, 139, 253, 0.1);
  border: 1px solid rgba(56, 139, 253, 0.2);
  border-radius: 20px;
  padding: 0.3rem 0.9rem;
}

/* Search */
.search-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.search {
  width: 100%;
  max-width: 500px;
  padding: 0.75rem 1.1rem;
  font-size: 1rem;
  border: 1px solid #30363d;
  border-radius: 10px;
  background: #161b22;
  color: #e6edf3;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search::placeholder {
  color: #484f58;
}

.search:focus {
  border-color: #388bfd;
  box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.12);
}

/* Category bar */
.category-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.cat-btn {
  padding: 0.3rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 500;
  border: 1px solid #21262d;
  border-radius: 20px;
  background: #161b22;
  color: #8b949e;
  cursor: pointer;
  transition: all 0.15s;
}

.cat-btn:hover {
  border-color: #388bfd;
  color: #58a6ff;
}

.cat-btn.active {
  background: rgba(56, 139, 253, 0.15);
  border-color: #388bfd;
  color: #58a6ff;
}

/* Count */
.count {
  text-align: center;
  font-size: 0.82rem;
  color: #8b949e;
  margin-bottom: 1.25rem;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
}

/* Card */
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  width: 100%;
  height: 72px;
  padding: 6px;
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s, border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  user-select: none;
  overflow: hidden;
}

.card:hover {
  background: #1c2128;
  border-color: #388bfd;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(56, 139, 253, 0.2);
}

.card:active {
  transform: translateY(0);
  box-shadow: none;
}

.card.copied {
  background: rgba(35, 134, 54, 0.2);
  border-color: #2ea043;
}

.card img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  transition: transform 0.15s;
}

.card:hover img {
  transform: scale(1.2);
}

.copy-hint {
  font-size: 0.52rem;
  color: #58a6ff;
  opacity: 0;
  transition: opacity 0.15s;
  line-height: 1;
}

.card:hover .copy-hint {
  opacity: 0.8;
}

.code {
  font-size: 0.62rem;
  opacity: 0.75;
  color: #8b949e;
  text-align: center;
  word-break: break-all;
  line-height: 1.2;
  border-radius: 4px;
  padding: 1px 3px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, opacity 0.15s;
}

.code:hover {
  background: rgba(56, 139, 253, 0.15);
  color: #58a6ff;
  opacity: 1;
}

.card:hover .code {
  opacity: 1;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: #238636;
  color: #fff;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 600px) {
  h1 {
    font-size: 1.6rem;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 6px;
  }

  .card {
    height: 64px;
    padding: 4px;
  }

  .card img {
    width: 18px;
    height: 18px;
  }

  .code {
    font-size: 0.55rem;
  }
}