* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #1f2937 0, #020617 55%, #000000 100%);
  color: #e5e7eb;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem 2.5rem;
}

header {
  text-align: center;
  margin-bottom: 1rem;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.subtitle {
  margin-top: 0.25rem;
  font-size: 0.9rem;
  color: #9ca3af;
}

.card {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid #1f2937;
  padding: 1rem;
  border-radius: 14px;
  margin-bottom: 1rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.card h3 {
  margin-bottom: 0.35rem;
  margin-top: 0.75rem;
  font-size: 1rem;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

label {
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

select,
input {
  background: #020617;
  color: #f9fafb;
  border: 1px solid #374151;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.9rem;
}

button {
  background: linear-gradient(to right, #22c55e, #16a34a);
  border: none;
  padding: 6px 14px;
  border-radius: 10px;
  color: white;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
}

button:hover {
  filter: brightness(1.05);
}

button:active {
  transform: translateY(1px);
}

textarea {
  width: 100%;
  background: #020617;
  color: #f9fafb;
  border-radius: 10px;
  border: 1px solid #374151;
  padding: 0.75rem;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9rem;
  resize: vertical;
}

.status {
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

.status.error {
  color: #fb7185;
}

.status.ok {
  color: #4ade80;
}

.hint {
  font-size: 0.85rem;
  color: #9ca3af;
}

.example {
  background: #020617;
  border-radius: 8px;
  border: 1px solid #374151;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  overflow-x: auto;
}

.buttons-row {
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

code {
  background: rgba(15, 23, 42, 0.9);
  padding: 0.1rem 0.25rem;
  border-radius: 4px;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: #6b7280;
}

/* Channel cards */

.channel-card {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid #374151;
  padding: 0.75rem;
  border-radius: 12px;
  margin-top: 0.75rem;
}

.channel-header {
  justify-content: space-between;
}

.channel-header h3 {
  margin: 0;
}

.mute-btn {
  background: linear-gradient(to right, #f97316, #ea580c);
}

.delete-btn {
  background: linear-gradient(to right, #ef4444, #b91c1c);
}

@media (max-width: 640px) {
  .app {
    padding: 1rem 0.5rem 2rem;
  }
}