:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --fg: #1a1a1a;
  --card: #ffffff;
  --border: #d8d8dc;
  --accent: #2f6fed;
  --error: #c0392b;
  --success: #1e824c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --fg: #e8e8ea;
    --card: #1f2023;
    --border: #33343a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 {
  margin-bottom: 0.25rem;
}

.subtitle {
  color: #767680;
  margin-top: 0;
  margin-bottom: 2rem;
}

form {
  display: grid;
  gap: 0.4rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

select,
input {
  padding: 0.6rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-size: 1rem;
}

button {
  margin-top: 1rem;
  padding: 0.7rem 1rem;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.result {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
}

.result.success {
  background: rgba(30, 130, 76, 0.12);
  color: var(--success);
}

.result.error {
  background: rgba(192, 57, 43, 0.12);
  color: var(--error);
}

section {
  margin-top: 2.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: #767680;
  font-weight: 600;
}