:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e38;
  --text: #e7e9ee;
  --muted: #9aa1ad;
  --accent: #4f9dff;
  --accent2: #35c46a;
  --warn: #e0a93c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.wrap { max-width: 1000px; margin: 0 auto; padding: 32px 20px 80px; }
header h1 { margin: 0 0 4px; font-size: 28px; }
.subtitle { color: var(--muted); margin: 0 0 24px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.row { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; }
.field { flex: 1; min-width: 220px; display: flex; flex-direction: column; gap: 6px; }
label { font-size: 13px; color: var(--muted); }
input[type=text], input[type=number] {
  background: #0d0f13;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
}
.months-box { display: flex; flex-wrap: wrap; gap: 8px; }
.months-box label {
  background: #0d0f13; border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; font-size: 13px; color: var(--text); cursor: pointer;
}
.months-box input { margin-right: 6px; }
.duration-row { display: flex; align-items: center; gap: 8px; }
.duration-row input { width: 80px; }
.sources-box { display: flex; gap: 16px; flex-wrap: wrap; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); }

button[type=submit] {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button[type=submit]:hover { opacity: 0.9; }
button[type=submit]:disabled { opacity: 0.5; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 12px; margin: 10px 0 0; }

.status { margin-top: 20px; color: var(--muted); }
.warnings {
  margin-top: 16px; background: #2a2410; border: 1px solid var(--warn);
  color: var(--warn); border-radius: 8px; padding: 12px 16px; font-size: 13px;
}
.warnings ul { margin: 4px 0 0; padding-left: 18px; }

#resultsWrap { margin-top: 24px; }
.results-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 10px; color: var(--muted); font-size: 14px;
}
.results-header select {
  background: #0d0f13; color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 8px;
}
table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: 12px; overflow: hidden; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tbody tr:hover { background: #1d212b; }
.price-cell { font-weight: 700; color: var(--accent2); }
.source-badge {
  font-size: 11px; padding: 2px 8px; border-radius: 20px; background: #232838; color: var(--muted);
}
a.book-link { color: var(--accent); text-decoration: none; font-size: 13px; }
a.book-link:hover { text-decoration: underline; }