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

:root {
  --bg: #0f172a;
  --card: #1e293b;
  --surface: #273449;
  --primary: #6366f1;
  --accent: #22d3ee;
  --success: #10b981;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.08);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: linear-gradient(160deg, #0f172a, #111827);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  color: var(--text);
}

.container {
  width: 100%;
  max-width: 720px;
}

h1 {
  text-align: center;
  font-size: 2rem;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  text-align: center;
  color: var(--muted);
  margin: 0.4rem 0 2rem;
}

.snippets {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.snippet {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.1rem 1.25rem;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.snippet:hover {
  border-color: rgba(99, 102, 241, 0.5);
  transform: translateX(4px);
}

.snippet-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.snippet-text {
  font-family: 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.88rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.5;
}

.copy-btn {
  border: none;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.6rem 1.3rem;
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  white-space: nowrap;
  transition: all 0.25s ease;
}

.copy-btn:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.copy-btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}

.copy-btn.copied {
  background: var(--success);
}

.copy-btn:disabled {
  cursor: default;
}

.custom {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}

.custom label {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.input-row {
  display: flex;
  gap: 0.85rem;
}

.input-row input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.8rem 1rem;
  outline: none;
  transition: border-color 0.25s ease;
}

.input-row input:focus {
  border-color: var(--primary);
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translate(-50%, 120%);
  background: var(--success);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.8rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.35);
  transition: transform 0.4s cubic-bezier(0.21, 1.02, 0.73, 1);
  z-index: 100;
}

.toast.show {
  transform: translate(-50%, 0);
}

@media (max-width: 640px) {
  .snippet {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .copy-btn {
    width: 100%;
  }

  .input-row {
    flex-direction: column;
  }
}