:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #1d2330;
  --muted: #5b6475;
  --panel: #ffffff;
  --line: #d6dae2;
  --accent: #2f6fdb;
  font: 15px/1.45 system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171d;
    --fg: #e3e7ef;
    --muted: #9aa3b5;
    --panel: #1c2028;
    --line: #2e3440;
    --accent: #6ea0ff;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
}

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

button {
  font: inherit;
  padding: 0.45rem 1rem;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

.card {
  max-width: 22rem;
  margin: 12vh auto 0;
  padding: 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}

form {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

label {
  display: grid;
  gap: 0.3rem;
  color: var(--muted);
}

input {
  font: inherit;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
}

progress {
  width: 100%;
  margin-top: 1rem;
}

#status {
  min-height: 1.4em;
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.viewer {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.viewer header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.6rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

#state {
  flex: 1;
  color: var(--muted);
}

#log {
  flex: 1;
  overflow: auto;
  padding: 0.5rem 1rem;
  font: 13px/1.4 ui-monospace, monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

[hidden] {
  display: none !important;
}

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