body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: linear-gradient(180deg, #f3f7ff 0%, #eef2f7 100%);
  color: #1f2937;
}

.container {
  max-width: 1040px;
  margin: 32px auto;
  background: #ffffff;
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 10px 35px rgba(16, 24, 40, 0.1);
}

h1,
h2 {
  margin-top: 0;
}

.subtitle {
  color: #4b5563;
  margin-bottom: 8px;
}

form {
  display: grid;
  gap: 10px;
  margin: 20px 0;
}

input[type="url"] {
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 15px;
}

button {
  width: 140px;
  padding: 11px 12px;
  border: 0;
  border-radius: 8px;
  background: #0f172a;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
}

button:hover {
  background: #111827;
}

.panel {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  background: #fcfcfd;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  font-size: 12px;
}

.code {
  background: #0b1020;
  color: #d4def2;
  border-radius: 8px;
  padding: 12px;
  border: 1px solid #1f2a44;
  line-height: 1.45;
  max-height: 420px;
  overflow: auto;
}

.alert {
  padding: 10px 12px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.alert.error {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.summary-item {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 10px;
}

.summary-item.full {
  grid-column: 1 / -1;
}

.summary-item .k {
  display: block;
  color: #64748b;
  font-size: 12px;
  margin-bottom: 4px;
}

.summary-item .v {
  display: block;
  font-size: 14px;
  color: #0f172a;
  word-break: break-word;
}

.redirect-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.redirect-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid #e5e7eb;
  background: #f8fafc;
  border-radius: 8px;
  padding: 10px;
}

.code-badge {
  display: inline-block;
  min-width: 44px;
  text-align: center;
  border-radius: 999px;
  background: #334155;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 8px;
}

.code-badge.final {
  background: #166534;
}

.redirect-url {
  font-size: 13px;
  color: #0f172a;
  word-break: break-all;
}

.redirect-arrow {
  font-size: 13px;
  color: #475569;
  margin-top: 2px;
  word-break: break-all;
}

@media (max-width: 720px) {
  .container {
    margin: 16px;
    padding: 18px;
  }

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