/* WhatInvoice Guides — shared article styles. Same tokens as the main site. */
:root{
  --ink:#0C3B2E; --ink-deep:#072720; --ink-soft:#14503F;
  --paper:#F5F0E1; --paper-2:#FFFCF2; --rule:#D8D0BA;
  --lime:#C8F04A; --lime-deep:#8FBA1E; --coral:#E2574C;
  --mono:'IBM Plex Mono',ui-monospace,monospace; --disp:'Bricolage Grotesque','Helvetica Neue',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--disp);background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.7}
a{color:var(--ink-deep)}
nav{display:flex;align-items:center;justify-content:space-between;max-width:840px;margin:0 auto;padding:20px 5%}
nav .mark{display:flex;align-items:center;gap:8px;font-weight:800;text-decoration:none;font-size:17px;color:var(--ink-deep)}
nav .links{display:flex;gap:22px;font-size:13px}
nav .links a{text-decoration:none;font-weight:600}
nav .links a:hover{color:var(--lime-deep)}
main{max-width:720px;margin:0 auto;padding:24px 5% 60px}
.crumb{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}
.crumb a{color:var(--ink-soft);text-decoration:none}
h1{font-size:clamp(28px,5vw,40px);line-height:1.15;margin:14px 0 10px;color:var(--ink-deep);letter-spacing:-.01em}
.meta{font-family:var(--mono);font-size:12px;color:var(--ink-soft);margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--rule)}
article h2{font-size:22px;margin:36px 0 12px;color:var(--ink-deep)}
article h3{font-size:17px;margin:26px 0 8px;color:var(--ink-deep)}
article p{margin:0 0 16px}
article ul,article ol{margin:0 0 16px 22px}
article li{margin-bottom:8px}
article table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:14.5px;background:var(--paper-2)}
article th,article td{border:1px solid var(--rule);padding:9px 12px;text-align:left;vertical-align:top}
article th{background:var(--ink-deep);color:var(--paper);font-weight:700}
.tip{background:var(--paper-2);border-left:4px solid var(--lime-deep);padding:14px 18px;margin:0 0 18px;font-size:15px}
.example{background:var(--ink-deep);color:var(--paper);font-family:var(--mono);font-size:13.5px;padding:18px 20px;border-radius:10px;margin:0 0 20px;white-space:pre-wrap;line-height:1.8}
.faq details{background:var(--paper-2);border:1px solid var(--rule);border-radius:8px;margin-bottom:10px;padding:0}
.faq summary{cursor:pointer;font-weight:700;padding:13px 16px}
.faq details p{padding:0 16px 14px;margin:0}
.cta{background:var(--lime);border-radius:14px;padding:24px 26px;margin:38px 0 26px;color:var(--ink-deep)}
.cta h2{margin:0 0 8px;font-size:20px}
.cta p{margin:0 0 14px;font-size:15px}
.cta a.btn{display:inline-block;background:var(--ink-deep);color:var(--lime);font-weight:800;text-decoration:none;padding:12px 22px;border-radius:999px;font-size:15px}
.related{border-top:1px solid var(--rule);padding-top:18px;font-size:14.5px}
.related strong{display:block;margin-bottom:6px}
footer{border-top:1px solid var(--rule);margin-top:20px}
footer .wrap{max-width:840px;margin:0 auto;padding:22px 5%;font-size:12.5px;color:var(--ink-soft);line-height:1.7}
footer a{color:var(--ink-soft)}
/* index cards */
.postgrid{display:grid;gap:16px;margin-top:26px}
.postcard{background:var(--paper-2);border:1px solid var(--rule);border-radius:12px;padding:20px 22px}
.postcard h2{margin:0 0 6px;font-size:19px}
.postcard h2 a{text-decoration:none;color:var(--ink-deep)}
.postcard h2 a:hover{color:var(--lime-deep)}
.postcard p{margin:0 0 8px;font-size:14.5px}
.postcard .tag{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft)}