* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #eef4ff 0%, #f8fbff 100%);
  color: #1b2a41;
}

header {
  padding: 1.2rem 1.4rem;
  background: #0b3954;
  color: #f3f7fb;
}

h1 {
  margin: 0 0 0.4rem 0;
  font-size: 1.4rem;
}

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.8rem;
  padding: 0.8rem;
}

.panel {
  background: #ffffff;
  border: 1px solid #c6d6eb;
  border-radius: 10px;
  padding: 0.8rem;
  box-shadow: 0 2px 8px rgba(15, 35, 55, 0.06);
}

.panel-wide {
  grid-column: 1 / -1;
}

.panel-wide:nth-last-of-type(2) {
  order: 100;
}

.panel-wide:last-of-type {
  order: 101;
}

.panel h2 {
  margin-top: 0;
  font-size: 1rem;
}

label {
  display: block;
  margin: 0.4rem 0;
  font-size: 0.9rem;
}

input,
select,
button {
  width: 100%;
  margin-top: 0.25rem;
  border: 1px solid #9db3cf;
  border-radius: 6px;
  font-size: 0.9rem;
}

input,
select {
  padding: 0.45rem;
  background: #fbfdff;
}

button {
  padding: 0.55rem;
  cursor: pointer;
  background: #1d6fa5;
  color: #ffffff;
  font-weight: 600;
}

button.warn {
  background: #af6d1d;
}

button.danger {
  background: #a12626;
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.hint {
  font-size: 0.8rem;
  color: #425b7a;
}

textarea[readonly] {
  width: 100%;
  min-height: 220px;
  max-height: 70vh;
  resize: both;
  overflow: auto;
  margin: 0;
  padding: 0.6rem;
  border: 1px solid #2f4b66;
  border-radius: 6px;
  background: #0f1720;
  color: #d9ecff;
  font-size: 0.8rem;
  font-family: "IBM Plex Mono", "Cascadia Code", monospace;
  white-space: pre;
}