:root {
  --c-bg: #f7fcfa;
  --c-fg: #1a2a26;
  --c-muted: #5b6e69;
  --c-accent: #0a7d6b;
  --c-accent-hover: #075c4f;
  --c-border: #d6ede4;
  --c-card-bg: #ffffff;
  --c-card-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.04);
  --max-w: 760px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --r: 10px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: var(--font-sans); font-size: 17px; line-height: 1.6; color: var(--c-fg); background: var(--c-bg); -webkit-font-smoothing: antialiased; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 24px 20px; }
header.site { border-bottom: 1px solid var(--c-border); padding: 14px 20px; background: #fff; }
header.site .row { max-width: var(--max-w); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
header.site a.brand { color: var(--c-fg); font-weight: 700; font-size: 18px; }
header.site nav a { margin-left: 16px; font-size: 14px; color: var(--c-muted); }
h1 { font-family: var(--font-serif); font-size: 34px; line-height: 1.25; margin: 24px 0 12px; }
h2 { font-size: 24px; margin: 32px 0 12px; }
h3 { font-size: 19px; margin: 22px 0 8px; }
p, ul, ol { margin: 12px 0; }
ul, ol { padding-left: 24px; }
.meta { color: var(--c-muted); font-size: 14px; margin-bottom: 16px; }
.btn { display: inline-block; background: var(--c-accent); color: #fff; padding: 12px 22px; border-radius: var(--r); font-weight: 600; font-size: 16px; border: none; cursor: pointer; }
.btn:hover { background: var(--c-accent-hover); text-decoration: none; }
.btn-secondary { background: transparent; color: var(--c-accent); border: 1.5px solid var(--c-accent); }
.card { background: var(--c-card-bg); border: 1px solid var(--c-border); border-radius: var(--r); box-shadow: var(--c-card-shadow); padding: 18px; margin: 16px 0; }
.app-card { display: flex; align-items: center; gap: 14px; padding: 14px 16px; border: 1px solid var(--c-border); border-radius: var(--r); background: #fff; margin: 10px 0; }
.app-card img { width: 56px; height: 56px; border-radius: 12px; }
.app-card .info { flex: 1; }
.app-card .info b { display: block; }
.app-card .info span { color: var(--c-muted); font-size: 14px; }
.app-card a.cta { background: var(--c-accent); color: #fff; padding: 8px 14px; border-radius: 8px; font-size: 14px; font-weight: 600; }
.grid-apps { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 20px 0; }
@media (min-width: 600px) { .grid-apps { grid-template-columns: 1fr 1fr; } }
.tool-form { background: #fff; border: 1px solid var(--c-border); border-radius: var(--r); padding: 18px; }
.tool-form label { display: block; margin: 12px 0 6px; font-weight: 600; font-size: 15px; }
.tool-form input[type=number], .tool-form input[type=date], .tool-form input[type=text], .tool-form select { width: 100%; padding: 10px 12px; font-size: 16px; border: 1px solid var(--c-border); border-radius: 8px; background: #fff; }
.result { margin-top: 18px; padding: 18px; border-radius: var(--r); background: #e8f5f0; border: 1px solid var(--c-border); }
.result.hidden { display: none; }
.result h3 { margin-top: 0; }
.cta-box { margin: 28px 0; padding: 20px; border-radius: var(--r); background: linear-gradient(135deg, #fff 0%, #e8f5f0 100%); border: 1px solid var(--c-border); display: flex; gap: 14px; align-items: center; }
.cta-box img { width: 64px; height: 64px; border-radius: 14px; flex-shrink: 0; }
.cta-box .copy { flex: 1; }
.cta-box .copy b { display: block; font-size: 17px; }
.cta-box .copy span { color: var(--c-muted); font-size: 14px; }
footer.site { border-top: 1px solid var(--c-border); margin-top: 60px; padding: 24px 20px; background: #fff; font-size: 14px; color: var(--c-muted); }
footer.site .row { max-width: var(--max-w); margin: 0 auto; }
footer.site .apps { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
footer.site .apps a { display: flex; align-items: center; gap: 6px; color: var(--c-fg); }
footer.site .apps img { width: 28px; height: 28px; border-radius: 6px; }
footer.site .disclaimer { font-size: 12px; line-height: 1.5; margin-top: 14px; }
.toc { background: #e8f5f0; border-radius: var(--r); padding: 14px 18px; margin: 18px 0; font-size: 14px; }
.toc b { display: block; margin-bottom: 6px; }
.toc a { display: block; padding: 3px 0; color: var(--c-fg); }
.faq-item { margin: 14px 0; }
.faq-item summary { font-weight: 600; cursor: pointer; padding: 8px 0; }
.faq-item p { margin: 6px 0 12px; }