:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a3140;
  --text: #e8eaed;
  --muted: #9aa3b2;
  --accent: #5b8cff;
  --accent2: #3d5a99;
  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.22);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fa;
    --card: #ffffff;
    --border: #dde3ee;
    --text: #1a1f2b;
    --muted: #5c6578;
    --accent: #2f6fed;
    --accent2: #d8e4ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.header {
  padding: 2rem 1.25rem 1rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 650;
}

.muted {
  color: var(--muted);
  margin: 0;
  font-size: 0.9rem;
}

.layout {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .layout {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.15rem 1.2rem;
}

.card h2 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input,
select,
textarea {
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

select {
  cursor: pointer;
}

button {
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
}

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

button.secondary {
  background: color-mix(in srgb, var(--card) 55%, var(--border));
  color: var(--text);
  border: 1px solid var(--border);
}

button.secondary:hover {
  filter: brightness(1.08);
}

@media (prefers-color-scheme: light) {
  button.secondary {
    background: #fff;
    color: var(--text);
  }
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.out {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  background: color-mix(in srgb, var(--card) 85%, var(--border));
  border: 1px solid var(--border);
  font-size: 0.8rem;
  overflow: auto;
  max-height: 220px;
  white-space: pre-wrap;
  word-break: break-word;
}

.footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  font-size: 0.85rem;
}