:root {
  --bg: #ffffff;
  --fg: #0b1220;
  --muted: #6b7280;
  --card: #f7faf8;
  --border: #e6eee9;
  --green: #1e9e52;
  --green-700: #0b6b36;
  --shadow: 0 10px 30px rgba(0,0,0,.06);
  --radius: 18px;
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font); color:var(--fg); background:var(--bg); line-height:1.6}
a{color:var(--green-700); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--max); margin:0 auto; padding:0 18px}

.skip-link{position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden}
.skip-link:focus{left:18px; top:18px; width:auto; height:auto; padding:10px 12px; background:#fff; border:1px solid var(--border); border-radius:12px; box-shadow:var(--shadow); z-index:9999}

header{position:sticky; top:0; background:rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom:1px solid var(--border); z-index:50}
.navbar{display:flex; align-items:center; justify-content:space-between; gap:16px; padding:12px 0}

.brand{display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.2px}
.brand img{width:28px; height:28px}

/* Primary nav */
.navlinks{display:flex; gap:14px; flex-wrap:wrap; align-items:center; justify-content:flex-end}
.navlinks a{padding:8px 10px; border-radius:12px; color:var(--fg)}
.navlinks a.active, .navlinks a:hover{background:var(--card); text-decoration:none}

.navtools{display:flex; align-items:center; gap:10px}
.searchbox{display:flex; align-items:center; gap:8px; background:var(--card); border:1px solid var(--border); border-radius:999px; padding:6px 10px}
.searchbox input{border:0; outline:0; background:transparent; width:190px; font-size:14px}
.searchbox button{border:0; background:transparent; cursor:pointer; color:var(--muted)}

.badge{display:inline-flex; gap:8px; align-items:center; font-size:12px; color:var(--green-700); background:#e9f8ef; border:1px solid #c9f0d7; padding:4px 10px; border-radius:999px}

.hero{padding:36px 0 10px}
.hero-grid{display:grid; grid-template-columns: 1.15fr .85fr; gap:18px; align-items:stretch}
.card{background:var(--card); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow)}
.hero .card{padding:22px}
h1{font-size:42px; line-height:1.08; margin:0 0 10px}
.lead{font-size:18px; color:#1f2937; margin:0 0 16px}

.cta-row{display:flex; gap:10px; flex-wrap:wrap; margin-top:14px}
.btn{display:inline-flex; align-items:center; gap:10px; padding:10px 14px; border-radius:14px; border:1px solid var(--border); background:#fff; color:var(--fg); cursor:pointer}
.btn.primary{background:var(--green); border-color:var(--green); color:white}
.btn.primary:hover{background:var(--green-700); border-color:var(--green-700); text-decoration:none}
.btn:hover{text-decoration:none}

.grid{display:grid; grid-template-columns: repeat(12, 1fr); gap:16px}
.col-8{grid-column: span 8}
.col-4{grid-column: span 4}
.col-6{grid-column: span 6}

.section{padding:18px 0}
.section h2{margin:0 0 10px; font-size:26px}
.section p{margin:0 0 10px; color:#111827}

.kpi{display:flex; gap:12px; flex-wrap:wrap}
.kpi .k{flex:1 1 160px; padding:14px 14px}
.kpi .k strong{display:block; font-size:18px}
.kpi .k span{color:var(--muted); font-size:13px}

.breadcrumbs{font-size:13px; color:var(--muted); margin:14px 0}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--green-700)}

article{padding:18px 0 36px}
article h1{font-size:36px}
article h2{font-size:22px; margin-top:22px}
article h3{font-size:18px; margin-top:18px}

ul{padding-left:18px}
li{margin:6px 0}

.note{border-left:4px solid var(--green); padding:10px 12px; background:#f1fbf5; border-radius:14px; margin:12px 0}

.toc{padding:14px; border:1px solid var(--border); border-radius:var(--radius); background:#fff}
.toc a{display:block; padding:6px 0; color:#111827}
.toc a:hover{color:var(--green-700); text-decoration:none}

.figure{padding:12px; background:#fff; border:1px solid var(--border); border-radius:var(--radius)}
.figure img{width:100%; height:auto; display:block}
.figure figcaption{color:var(--muted); font-size:13px; margin-top:8px}

.cards{display:grid; grid-template-columns: repeat(3, 1fr); gap:14px}
.cards .card{padding:14px}
.cards .card h3{margin:0 0 6px}
.cards .card p{margin:0; color:var(--muted)}

footer{border-top:1px solid var(--border); padding:26px 0; color:var(--muted)}
.footer-grid{display:grid; grid-template-columns: 2fr 1fr 1fr; gap:16px}
.footer-grid a{color:var(--muted)}
.footer-grid a:hover{color:var(--green-700)}

.small{font-size:13px}

.table{width:100%; border-collapse:collapse; overflow:hidden; border-radius:14px; border:1px solid var(--border)}
.table th,.table td{padding:10px 10px; border-bottom:1px solid var(--border); text-align:left; vertical-align:top}
.table th{background:#fff; font-size:13px; color:#374151}
.table tr:last-child td{border-bottom:0}

.pillrow{display:flex; flex-wrap:wrap; gap:8px; margin:10px 0}
.pill{display:inline-flex; align-items:center; padding:6px 10px; border-radius:999px; border:1px solid var(--border); background:#fff; color:#111827; font-size:13px}
.pill:hover{border-color:#c9f0d7; text-decoration:none}

@media (max-width: 960px) {
  .hero-grid{grid-template-columns:1fr}
  .col-8,.col-4,.col-6{grid-column: span 12}
  h1{font-size:34px}
  .cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .searchbox input{width:140px}
}

/* Tools */
.tool-grid{display:grid; grid-template-columns: repeat(12,1fr); gap:16px}
.tool-card{grid-column: span 6; padding:16px}
.tool-card input,.tool-card select{width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:14px; background:#fff; font-size:14px; outline:none}
.tool-card label{display:block; font-size:13px; color:var(--muted); margin:10px 0 6px}
.result-box{padding:14px; border:1px dashed #c9f0d7; border-radius:14px; background:#f1fbf5}
@media (max-width:960px){.tool-card{grid-column: span 12}}

/* =========================
   Mobile nav: collapse into button
   Requires: .navtoggle button + #primary-nav.navlinks
   ========================= */

.navtoggle{
  display:none;
  border:1px solid var(--border);
  background:#fff;
  border-radius:14px;
  padding:10px 12px;
  line-height:1;
  cursor:pointer;
  color:var(--fg);
}

/* Mobile layout */
@media (max-width: 768px) {
  .navbar{
    position:relative;
  }

  /* show the hamburger */
  .navtoggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
  }

  /* hide nav by default */
  nav.navlinks{
    display:none;
    position:absolute;
    left:0;
    right:0;
    top:100%;
    margin-top:10px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:10px;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    z-index:100;
  }

  nav.navlinks a{
    padding:10px 12px;
    border-radius:12px;
  }

  /* Open menu when header area is focused (button focused, or user tabs into menu) */
  header:focus-within nav.navlinks{
    display:flex;
  }

  /* Optional: if you later add JS to toggle .is-open on header or body */
  header.is-open nav.navlinks{
    display:flex;
  }
}