:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --ink: #10243d;
  --muted: #5f6f85;
  --accent: #1f6feb;
  --danger: #bd2c40;
  --line: #d7e0ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top right, #dce9ff, var(--bg));
}

.container {
  width: min(1120px, 94vw);
  margin: 1rem auto 3rem;
}

h1 {
  margin: 0;
}

.sub {
  color: var(--muted);
}

.panel,
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem;
  margin-top: 1rem;
}

.grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

label {
  display: block;
  font-size: 0.88rem;
  margin: 0.6rem 0 0.3rem;
}

input,
textarea,
button {
  width: 100%;
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 0.7rem;
}

button {
  cursor: pointer;
  background: var(--accent);
  border: 0;
  color: #fff;
  font-weight: 600;
  margin-top: 0.8rem;
}

card header,
.card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.card header button {
  width: auto;
  margin: 0;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
}

.box {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0.5rem 0 0;
  min-height: 3.5rem;
  background: #fbfdff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
}

.status {
  margin-top: 0.5rem;
  color: var(--muted);
}

.error {
  color: var(--danger);
  font-weight: 600;
}