* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f5f7fb 0%, #eef2fb 100%);
  color: #1f2933;
}

.app {
  max-width: 960px;
  margin: 40px auto;
  padding: 0 16px 64px;
}

header {
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

p {
  margin: 0;
  line-height: 1.5;
}

.card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
}

.card h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-weight: 600;
  color: #334155;
}

.purchase-notice {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 2px solid #f59e0b;
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 1rem;
  font-weight: 600;
  color: #92400e;
  text-align: center;
}

.purchase-notice a {
  color: #ea580c;
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid #ea580c;
  transition: all 0.2s ease;
}

.purchase-notice a:hover {
  color: #c2410c;
  border-bottom-color: #c2410c;
  background: rgba(234, 88, 12, 0.1);
  padding: 2px 4px;
  border-radius: 4px;
}

input,
select {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #d1d7e0;
  font-size: 1rem;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 8px 0 12px;
}

button {
  padding: 12px 20px;
  border-radius: 999px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.2);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button.secondary {
  background: #ec4899;
  color: #fff;
}

button.secondary:hover {
  box-shadow: 0 10px 20px rgba(236, 72, 153, 0.24);
}

button.ghost {
  background: #1f2933;
  color: #fff;
}

button.ghost:hover {
  box-shadow: 0 10px 20px rgba(17, 24, 39, 0.24);
}

button:not(.secondary):not(.ghost) {
  background: #6366f1;
  color: #fff;
}

.status {
  min-height: 1.5em;
  margin: 0;
  color: #64748b;
  font-size: 0.95rem;
}

.status.error {
  color: #dc2626;
}

.status.success {
  color: #0f766e;
}

.results {
  display: grid;
  gap: 24px;
}

.result-block {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
  transition: border 0.2s ease;
}

.result-block:hover {
  border-color: #c7d2fe;
}

.placeholder {
  color: #94a3b8;
}

.quota-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.quota-item {
  background: #f8fafc;
  border-radius: 10px;
  padding: 16px;
}

.quota-item span {
  display: block;
  color: #475569;
}

.quota-item strong {
  display: block;
  margin-top: 8px;
  font-size: 1.25rem;
  color: #111827;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag {
  background: #e0e7ff;
  color: #3730a3;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.meta {
  margin-top: 16px;
  color: #475569;
  font-size: 0.95rem;
}

.usage-list {
  max-height: 320px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
  padding-right: 8px;
}

.usage-item {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  background: #f9fafc;
  display: grid;
  gap: 6px;
}

.usage-item strong {
  font-size: 1rem;
  color: #1f2937;
}

.usage-item span {
  font-size: 0.95rem;
  color: #475569;
}

.empty-state {
  color: #94a3b8;
  font-style: italic;
}

footer {
  margin-top: 32px;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .app {
    margin: 24px auto;
    padding-bottom: 48px;
  }

  .card {
    padding: 20px;
  }

  button {
    flex: 1 1 100%;
  }
}