:root {
  --bg: #14161a;
  --panel: #1c1f26;
  --panel-2: #232733;
  --ink: #e7e9ee;
  --muted: #9aa3b2;
  --line: #2e333f;
  --accent: #6ee7a8;
  --accent-ink: #0c1f15;
  --error: #ff8b8b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, sans-serif;
}
header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.brand span { color: var(--muted); font-weight: 400; }
.tag { color: var(--muted); font-size: 13px; }
main { max-width: 720px; margin: 0 auto; padding: 32px 24px 64px; }
footer {
  max-width: 720px; margin: 0 auto; padding: 24px;
  border-top: 1px solid var(--line); color: var(--muted); font-size: 14px;
}
footer a, main a { color: var(--accent); }
h1 { font-size: 26px; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 28px; }
code {
  background: var(--panel-2); padding: 1px 5px; border-radius: 4px;
  font-size: 13px;
}

/* tool list */
.tools { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.tools a {
  display: block; padding: 18px 20px; background: var(--panel);
  border: 1px solid var(--line); border-radius: 12px; text-decoration: none;
  color: var(--ink); transition: border-color .12s, background .12s;
}
.tools a:hover { border-color: var(--accent); background: var(--panel-2); }
.tools .name { display: block; font-weight: 600; margin-bottom: 3px; }
.tools .blurb { display: block; color: var(--muted); font-size: 14px; }

/* form */
form { display: grid; gap: 18px; }
.drop {
  display: grid; place-items: center; gap: 6px; text-align: center;
  padding: 44px 20px; background: var(--panel);
  border: 1.5px dashed var(--line); border-radius: 14px; cursor: pointer;
  transition: border-color .12s, background .12s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--panel-2); }
.drop input[type=file] { display: none; }
.drop-text { font-weight: 600; }
.drop-count { color: var(--accent); font-size: 14px; }

.opts { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.opts summary { padding: 12px 16px; cursor: pointer; font-weight: 600; }
.opts-grid { padding: 4px 16px 16px; display: grid; gap: 18px; }
.opts-grid label { display: grid; gap: 6px; font-size: 14px; }
.opts-grid label.check { grid-template-columns: auto 1fr; align-items: start; gap: 4px 10px; }
.opts-grid label.check small { grid-column: 2; }
.opts-grid small { color: var(--muted); }
.opts-grid input[type=range] { accent-color: var(--accent); }
select {
  background: var(--panel-2); color: var(--ink); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; font: inherit; max-width: 220px;
}

button {
  justify-self: start; padding: 12px 28px; font: inherit; font-weight: 700;
  background: var(--accent); color: var(--accent-ink); border: 0;
  border-radius: 10px; cursor: pointer;
}
button:disabled { opacity: .45; cursor: not-allowed; }

.status { margin: 0; font-size: 14px; min-height: 1.6em; }
.status.working { color: var(--muted); }
.status.ok { color: var(--accent); }
.status.error { color: var(--error); white-space: pre-wrap; }