/* Shared stylesheet for long-form guide pages.
   Colour tokens mirror index.html so pages feel like one site. */

:root{
  --ink:#0A2A30;
  --ink-soft:#3B5A63;
  --muted:#66808A;
  --line:#DCE7E8;
  --bg:#F5F9F9;
  --card:#FFFFFF;
  --deep:#06333D;
  --deep-2:#0A414D;
  --teal:#0C8F8F;
  --teal-soft:#E2F4F1;
  --amber:#FFC46B;
  --shadow:0 10px 30px rgba(6,51,61,.08);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16.5px;
  line-height:1.72;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:var(--teal)}
a:hover{color:#0A6E6E}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:8px;top:8px;border-radius:8px;outline:2px solid var(--teal)}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

/* ---------- top bar ---------- */
.topbar{background:var(--deep);color:#BFE3E0;font-size:12.5px;letter-spacing:.02em}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px;gap:16px}
.topbar .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#4ED0B4;margin-right:7px;vertical-align:1px}
.langs{display:flex;gap:12px;align-items:center}
.langs a{color:#BFE3E0;text-decoration:none;padding:2px 4px;border-radius:4px}
.langs a:hover{color:#fff;text-decoration:underline}
.langs a[aria-current="true"]{color:var(--amber);font-weight:600}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:40;background:rgba(245,249,249,.9);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:16.5px;letter-spacing:-.01em;text-decoration:none;color:var(--ink)}
.brand .mark{width:32px;height:32px;border-radius:9px;background:var(--deep);display:grid;place-items:center;flex:none}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:-2px}
.menu{display:flex;align-items:center;gap:22px;font-size:14px}
.menu a{text-decoration:none;color:var(--ink-soft)}
.menu a:hover{color:var(--teal)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;
  padding:11px 18px;font-size:14.5px;font-weight:500;text-decoration:none;cursor:pointer;transition:transform .12s,background .15s,border-color .15s;font-family:inherit}
.btn:active{transform:translateY(1px)}
.btn-primary{background:#128C4A;color:#fff}
.btn-primary:hover{background:#0F7A40;color:#fff}
.btn-dark{background:var(--deep);color:#fff}
.btn-dark:hover{background:var(--deep-2);color:#fff}
.btn-ghost{background:transparent;border-color:#B9CDD0;color:var(--ink)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn svg{flex:none}

/* ---------- breadcrumb ---------- */
.crumbs{font-size:13px;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--teal);text-decoration:underline}
.crumbs span[aria-current]{color:var(--ink-soft)}

/* ---------- article ---------- */
main{padding:0 0 70px}
article{max-width:760px;margin:0 auto}
article header{padding:20px 0 0;position:static;background:none;border:none;backdrop-filter:none}
h1{font-size:clamp(27px,3.6vw,40px);line-height:1.22;letter-spacing:-.03em;margin:14px 0 16px}
.dek{font-size:18px;color:var(--ink-soft);margin:0 0 18px}
.byline{font-size:13.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:30px;display:flex;flex-wrap:wrap;gap:6px 16px}
h2{font-size:clamp(21px,2.4vw,27px);letter-spacing:-.02em;margin:44px 0 14px;scroll-margin-top:90px}
h3{font-size:18.5px;letter-spacing:-.01em;margin:30px 0 10px;scroll-margin-top:90px}
p{margin:0 0 18px}
ul,ol{margin:0 0 20px;padding-left:22px}
li{margin:0 0 9px}
li strong{color:var(--ink)}
strong{font-weight:600}
blockquote{margin:26px 0;padding:16px 20px;background:#fff;border-left:3px solid var(--teal);border-radius:0 10px 10px 0;color:var(--ink-soft)}
blockquote p:last-child{margin-bottom:0}

/* ---------- callouts ---------- */
.note{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:26px 0;box-shadow:var(--shadow)}
.note h3{margin:0 0 8px;font-size:15px;letter-spacing:.02em;text-transform:uppercase;color:var(--teal)}
.note p:last-child,.note ul:last-child{margin-bottom:0}
.note.warn{border-color:#F0D3A8;background:#FFFBF3}
.note.warn h3{color:#9A6A12}

/* ---------- tables ---------- */
.tablewrap{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:14px;background:#fff}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:460px}
th,td{padding:12px 15px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#F0F7F6;font-weight:600;font-size:13.5px;letter-spacing:.01em;color:var(--ink)}
tbody tr:last-child td{border-bottom:none}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
caption{caption-side:bottom;padding:10px 15px;font-size:13px;color:var(--muted);text-align:left}

/* ---------- steps ---------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:24px 0}
.steps li{counter-increment:s;position:relative;padding-left:46px;margin-bottom:20px}
.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;
  background:var(--deep);color:#fff;font-size:14px;font-weight:600;display:grid;place-items:center}
.steps li strong{display:block;margin-bottom:2px}

/* ---------- CTA ---------- */
.cta{background:var(--deep);color:#E8F5F3;border-radius:20px;padding:32px 30px;margin:44px 0}
.cta h2{color:#fff;margin:0 0 10px;font-size:24px}
.cta p{color:#BFE3E0;margin:0 0 22px;font-size:16px}
.cta .btn{font-size:15.5px;padding:14px 24px}
.cta .small{font-size:13px;color:#9FC9C6;margin:16px 0 0}

/* ---------- related ---------- */
.related{border-top:1px solid var(--line);margin-top:52px;padding-top:30px}
.related h2{font-size:19px;margin:0 0 16px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--teal);transform:translateY(-2px)}
.card strong{display:block;font-size:15.5px;margin-bottom:5px;letter-spacing:-.01em}
.card span{font-size:13.5px;color:var(--muted);line-height:1.55;display:block}

/* ---------- footer ---------- */
footer{background:var(--deep);color:#9FC9C6;font-size:13.5px;padding:34px 0}
footer a{color:#BFE3E0;text-decoration:none}
footer a:hover{color:#fff;text-decoration:underline}
footer .wrap{display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;justify-content:space-between}

@media (max-width:760px){
  .menu{display:none}
  body{font-size:16px}
  .cta{padding:26px 22px}
  h2{margin-top:36px}
}