:root {
  --bg: #f4f6ff;
  --panel: #ffffff;
  --line: #d5dcf3;
  --ink: #24304a;
  --muted: #65708f;
  --accent: #ff6fb2;
  --accent-2: #5ac8fa;
  --danger: #b42318;
  --shadow: 0 18px 40px rgba(36, 48, 74, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 111, 178, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(90, 200, 250, 0.18), transparent 28%),
    linear-gradient(180deg, #fdfdff 0%, var(--bg) 100%);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(320px, 1fr);
  gap: 24px;
  padding: 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 24px;
}

h1 {
  margin-top: 0;
  margin-bottom: 8px;
}

.subtitle {
  margin-top: 0;
  margin-bottom: 24px;
  color: var(--muted);
}

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

select,
textarea,
button {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  font: inherit;
}

.text-input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  font: inherit;
  padding: 14px 16px;
  margin: -6px 0 18px;
  background: #fbfcff;
}

select,
textarea {
  padding: 14px 16px;
  margin-bottom: 18px;
  background: #fbfcff;
}

textarea {
  min-height: 220px;
  resize: vertical;
}

textarea.input-area {
  min-height: 110px;
}

.button-row {
  display: grid;
  gap: 12px;
}

button {
  padding: 14px 18px;
  background: var(--accent);
  color: #fff;
  border: 0;
  cursor: pointer;
  font-weight: 700;
}

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

button.ghost {
  background: #eef3ff;
  color: var(--ink);
  border: 1px solid var(--line);
}

button:hover {
  filter: brightness(0.98);
}

.output-block + .output-block {
  margin-top: 20px;
}

.status {
  margin: 18px 0 0;
  color: var(--muted);
  font-weight: 600;
}

.status.error {
  color: var(--danger);
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}