:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --muted: #444;
  --bg: #fafafa;
  --card: #fff;
  --line: #ccc;
  --accent: #0b57d0;
  --error: #a12828;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f2f2f2;
    --muted: #c8c8c8;
    --bg: #121212;
    --card: #1c1c1c;
    --line: #444;
    --accent: #8ab4f8;
    --error: #f28b82;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 {
  font-size: 1.6rem;
  font-weight: 650;
  margin: 0 0 0.75rem;
}

p { margin: 0 0 1rem; color: var(--muted); }
p a { color: var(--accent); }
code { font-size: 0.92em; }

.drop {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-start;
  padding: 1.1rem;
  border: 1px dashed var(--line);
  background: var(--card);
  margin: 1.25rem 0;
}

.drop.over { border-color: var(--accent); }

label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--fg);
}

#status { min-height: 1.5em; }
#status.error { color: var(--error); }

.meta { color: var(--fg); }
.hint { font-size: 0.92rem; }

.channels {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

button {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

button:disabled { opacity: 0.6; cursor: default; }

@media (prefers-color-scheme: dark) {
  button { color: #0b1220; }
}