:root {
  --bg: #1f2c34;
  --surface: #2a3942;
  --surface2: #3b4a54;
  --accent: #00a884;
  --green: #00d4a8;
  --text: #e9edef;
  --muted: #8696a0;
  --red: #e74c3c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  display: flex;
  justify-content: center;
  padding: 32px 16px;
}

.card {
  width: 100%;
  max-width: 640px;
}

header h1 { margin: 0 0 4px; font-size: 26px; }
.sub { color: var(--muted); margin: 0 0 24px; font-size: 14px; }

.block { margin-bottom: 20px; }
.field { display: block; margin-bottom: 10px; font-size: 13px; color: var(--text); }
.field > span { display: block; margin-bottom: 4px; color: var(--muted); }

input[type="password"], input[type="number"] {
  width: 100%;
  max-width: 200px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--surface2);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
}
input[type="password"] { max-width: 100%; }

.cols { display: flex; gap: 16px; flex-wrap: wrap; }
.cols .field { display: inline-flex; align-items: center; gap: 8px; }
.cols input { width: 64px; }

.file input { display: none; }
.file span {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 6px;
  cursor: pointer;
}
.muted { color: var(--muted); font-size: 12px; }
.hint { color: var(--muted); font-size: 12px; line-height: 1.6; }
code { background: var(--surface); padding: 1px 5px; border-radius: 4px; }

.actions { display: flex; gap: 12px; margin: 20px 0 12px; }
button {
  border: none;
  border-radius: 6px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}
button:disabled { opacity: 0.4; cursor: not-allowed; }
.primary { background: var(--accent); color: #fff; }
.secondary { background: var(--surface2); color: #fff; }

.status { min-height: 20px; font-size: 13px; margin-bottom: 16px; }
.status.ok { color: var(--green); }
.status.err { color: var(--red); }

.auth { max-width: 340px; }
.session { display: flex; align-items: center; gap: 12px; }
.session .ok { color: var(--green); font-weight: 600; }

#preview h2 { font-size: 16px; margin: 16px 0 8px; }
.preview table { width: 100%; border-collapse: collapse; font-size: 12px; }
.preview th, .preview td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--surface2); }
.preview th { color: var(--muted); font-weight: 600; }
.preview td { color: var(--text); }
.preview td:first-child { color: var(--green); font-family: monospace; }