:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #4b5563;
  --primary: #0f4c81;
  --primary-dark: #0a3559;
  --accent: #0a8f6a;
  --border: #dbe3ee;
  --warning-bg: #fff7e6;
  --warning-border: #ffd591;
  --warning-text: #7a4d00;
  --max: 1100px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; background: var(--bg); color: var(--text); line-height: 1.65; }
a { color: var(--primary); }
a:hover { color: var(--primary-dark); }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.header-inner { max-width: var(--max); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: .8rem 1rem; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .65rem; font-weight: 700; font-size: 1.05rem; text-decoration: none; color: var(--text); }
.brand img { border-radius: 6px; }
.nav-links { display: flex; flex-wrap: wrap; gap: .9rem; font-size: .95rem; }
.nav-links a { text-decoration: none; color: var(--muted); }
.hero, .content, .footer-inner { max-width: var(--max); margin: 0 auto; padding: 1.3rem 1rem; }
.hero { padding-top: 1.8rem; }
.hero h1 { margin: 0 0 .7rem; font-size: clamp(1.7rem, 2.4vw, 2.35rem); line-height: 1.25; }
.hero p { margin: .5rem 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .9rem; }
.badge { background: #eaf2fb; color: var(--primary-dark); border: 1px solid #c8ddf3; border-radius: 999px; font-size: .86rem; padding: .28rem .75rem; }
.calculator-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; margin: 1rem 0 1.2rem; }
.calc-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .9rem; }
.calc-field label { font-weight: 600; font-size: .92rem; display: block; margin-bottom: .35rem; }
.calc-field input { width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: .62rem; font-size: .95rem; }
.result-box { background: #f3f8ff; border: 1px solid #d5e5fb; border-radius: 12px; margin-top: .9rem; padding: .9rem; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .8rem; }
.result-item { background: #fff; border: 1px solid #deebfa; border-radius: 10px; padding: .7rem; }
.result-item h3 { margin: 0; font-size: .86rem; color: var(--muted); font-weight: 600; }
.result-item p { margin: .32rem 0 0; font-size: 1.15rem; font-weight: 700; }
.preset-row { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: .8rem; }
.preset-row button { border: 1px solid #c8d9ee; background: #f7fbff; color: var(--primary-dark); border-radius: 999px; padding: .38rem .75rem; font-size: .84rem; cursor: pointer; }
.warning { background: var(--warning-bg); border: 1px solid var(--warning-border); color: var(--warning-text); border-radius: 10px; padding: .75rem; margin-top: .8rem; font-size: .93rem; }
section { margin: 1.15rem 0; }
h2 { margin: 0 0 .55rem; font-size: 1.35rem; }
h3 { margin: .6rem 0 .35rem; font-size: 1.08rem; }
p, li { color: #243041; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; min-width: 600px; }
th, td { border-bottom: 1px solid var(--border); text-align: left; padding: .62rem; font-size: .93rem; }
th { background: #f1f6fc; font-weight: 700; }
tr:last-child td { border-bottom: 0; }
.quick-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .7rem; }
.quick-links a { display: block; border: 1px solid var(--border); background: var(--surface); border-radius: 10px; text-decoration: none; padding: .75rem; font-weight: 600; color: var(--primary); }
.faq-item { border: 1px solid var(--border); border-radius: 10px; background: var(--surface); padding: .8rem; margin-bottom: .65rem; }
.faq-item h3 { margin-top: 0; }
.footer { margin-top: 1.8rem; border-top: 1px solid var(--border); background: #f2f7fd; }
.footer-inner { font-size: .92rem; color: var(--muted); }
@media (max-width:900px){ .calc-grid,.result-box,.quick-links{grid-template-columns:1fr;} .nav-links{display:none;} }