:root {
  --accent: #6d28d9;
  --bg: #f8f7f4;
  --card: #ffffff;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #131110; --card: #1e1b19; --ink: #f5f4f2; --muted: #a8a29e; --line: #33302d; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }
.site-header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 56px; gap: 12px; flex-wrap: wrap; }
.brand { font-weight: 800; font-size: 1.05rem; color: var(--accent); text-decoration: none; letter-spacing: -0.01em; }
.site-header nav { display: flex; gap: 18px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.site-header nav a:hover { color: var(--accent); }
main { padding: 28px 20px 48px; }
h1 { font-size: clamp(1.5rem, 4vw, 2.1rem); letter-spacing: -0.02em; line-height: 1.2; margin: 0.4em 0 0.3em; }
.lede { color: var(--muted); margin-top: 0; max-width: 60ch; }
h2 { font-size: 1.35rem; margin-top: 2em; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; }
a { color: var(--accent); }
.tool-card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; margin: 18px 0 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
label { display: block; font-weight: 600; font-size: 0.9rem; margin: 14px 0 6px; }
input[type=text], input[type=number], input[type=time], input[type=date], select {
  width: 100%; padding: 12px 14px; font-size: 1.05rem; border: 1.5px solid var(--line);
  border-radius: 10px; background: var(--bg); color: var(--ink);
}
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
button.primary { background: var(--accent); color: #fff; border: 0; padding: 12px 22px; font-size: 1.05rem;
  font-weight: 700; border-radius: 10px; cursor: pointer; margin-top: 16px; }
button.primary:hover { filter: brightness(1.1); }
.result { margin-top: 18px; font-size: 1.05rem; }
.result strong { font-size: 1.5rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .grid2 { grid-template-columns: 1fr; } }
.ad-slot { margin: 26px 0; min-height: 90px; border: 1px dashed var(--line); border-radius: 10px;
  display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.1em; }
table { border-collapse: collapse; width: 100%; margin: 1em 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.table-scroll { overflow-x: auto; }
details { border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin: 10px 0; background: var(--card); }
summary { font-weight: 600; cursor: pointer; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.pill { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px; font-size: 0.9rem; cursor: pointer; color: var(--ink); }
.pill.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.site-footer { border-top: 1px solid var(--line); padding: 22px 0; color: var(--muted); font-size: 0.88rem; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }
.muted { color: var(--muted); }
.word-groups h3 { margin: 1.4em 0 0.4em; }
.word-list { display: flex; flex-wrap: wrap; gap: 8px; }
.word-list span { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; font-size: 0.98rem; cursor: pointer; }