:root {
  --bg: #f4f1ea;
  --ink: #1f1e1b;
  --accent: #3b5b5d;
  --accent-2: #b1653d;
  --card: #ffffff;
  --border: #d9d4c9;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Serif", "Georgia", serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #ffffff 0%, #f4f1ea 55%, #efe8dc 100%);
}

.page {
  max-width: 1100px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

header h1 {
  font-size: 2.4rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.25rem;
}

header p {
  margin-top: 0;
  color: #4f4b44;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: 0 10px 30px rgba(60, 50, 30, 0.12);
}

.form .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
}

select,
input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  background: #faf9f5;
}

.actions {
  display: flex;
  gap: 12px;
}

.hint {
  margin: 0 0 12px;
  color: #6b655d;
  font-size: 0.9rem;
}

button {
  padding: 10px 16px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
}

button.secondary {
  background: var(--accent-2);
}

button.ghost {
  background: #e8e0d1;
  color: #3a352e;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error {
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: 10px;
  background: #ffe9e1;
  border: 1px solid #f1b8a5;
}

.results {
  margin-top: 32px;
  display: grid;
  gap: 28px;
}

.result-block h3 {
  margin-bottom: 8px;
  color: var(--accent);
}

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px;
}

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

.df th,
.df td {
  border-bottom: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
}

.df th {
  background: #f5f0e6;
}

@media (max-width: 720px) {
  header h1 {
    font-size: 1.9rem;
  }

  .actions {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}