:root {
  --bg: #f3f6fc;
  --card: #ffffff;
  --text: #243145;
  --accent: #2456e8;
  --accent-soft: #e6edff;
  --danger: #d73f4a;
  --border: #d6dded;
  --muted: #5f6f8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #f7f9ff 0%, var(--bg) 100%);
  color: var(--text);
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 20;
}

.app-header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 8px 24px rgba(43, 72, 130, 0.08);
}

.page h2 {
  margin: 0 0 6px;
}

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

label {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

input {
  width: 100%;
  margin-top: 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  padding: 10px;
  font-size: 1rem;
}

button {
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 10px 14px;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.06);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ghost {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid #c5d2ff;
}

.danger {
  background: var(--danger);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.top-gap {
  margin-top: 8px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.info-grid > div {
  background: #f7f9ff;
  border: 1px solid #e0e6f7;
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.label {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.command-btn {
  padding: 11px;
  background: #284fca;
}

.output-wrap pre {
  background: #f9fbff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  min-height: 160px;
  overflow: auto;
}

.hidden {
  display: none;
}