/* E-invoicing UK — free guide by PaySorted */
:root{
  --ink:#16213e; --ink-2:#3d4a66; --muted:#5d6880;
  --bg:#ffffff; --bg-soft:#f4f6fb; --bg-tint:#eaf0fb;
  --line:#dde3ee; --brand:#2747b8; --brand-dark:#1b3290; --brand-soft:#e6ecfb;
  --accent:#0f8a6a; --accent-soft:#e3f5ef;
  --warn:#9a5b00; --warn-soft:#fff4e0;
  --radius:14px; --wrap:1080px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);font-size:17px;line-height:1.6}
img,svg{max-width:100%}
a{color:var(--brand)} a:hover{color:var(--brand-dark)}
:focus-visible{outline:3px solid #f2b705;outline-offset:2px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:9}
.skip:focus{left:8px;top:8px}

/* top strip + header */
.strip{background:var(--ink);color:#d9def0;font-size:13.5px}
.strip .wrap{display:flex;gap:6px 18px;flex-wrap:wrap;padding-top:7px;padding-bottom:7px}
.strip a{color:#fff}
.site-head{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:19px;letter-spacing:-.01em}
.logo small{display:block;font-weight:500;font-size:12px;color:var(--muted);letter-spacing:0}
.logo svg{flex:none}
.nav{display:flex;gap:4px;align-items:center}
.nav a{text-decoration:none;color:var(--ink-2);font-weight:600;font-size:15px;padding:8px 10px;border-radius:8px}
.nav a:hover,.nav a[aria-current=page]{background:var(--brand-soft);color:var(--brand-dark)}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 12px;font:inherit;font-weight:700;color:var(--ink)}
@media (max-width:880px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 14px}
  .nav.open{display:flex}
  .nav a{padding:12px 10px}
}

/* hero */
.hero{background:linear-gradient(180deg,var(--bg-tint),#fff);padding:48px 0 30px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand-dark);background:#fff;border:1px solid var(--line);padding:4px 10px;border-radius:99px}
h1{font-size:clamp(30px,5vw,46px);line-height:1.12;letter-spacing:-.02em;margin:14px 0 14px}
h2{font-size:clamp(23px,3.2vw,30px);line-height:1.2;letter-spacing:-.01em;margin:44px 0 12px}
h3{font-size:19px;line-height:1.3;margin:24px 0 8px}
.lead{font-size:clamp(18px,2.2vw,20.5px);color:var(--ink-2);max-width:760px;margin:0 0 18px}
.meta{font-size:14px;color:var(--muted)}
main{padding-bottom:40px}
.article{max-width:780px}
.article p,.article li{color:var(--ink-2)}
.article li{margin:6px 0}

/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 6px}
.btn{display:inline-block;text-decoration:none;font-weight:700;padding:13px 20px;border-radius:12px;background:var(--brand);color:#fff;border:2px solid var(--brand);font-size:16px}
.btn:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.btn.ghost{background:#fff;color:var(--brand-dark);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--brand)}
.btn.green{background:var(--accent);border-color:var(--accent)}
.btn.green:hover{background:#0b6f55;border-color:#0b6f55}

/* boxes */
.box{border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;background:#fff;margin:22px 0}
.box h2,.box h3{margin-top:0}
.box.short{background:var(--bg-soft);border-color:#cfd8ea}
.box.short ul{margin:6px 0 0;padding-left:20px}
.box.short li{margin:8px 0;color:var(--ink)}
.box.warn{background:var(--warn-soft);border-color:#f1d29c}
.box.warn strong{color:var(--warn)}
.box.ps{background:var(--accent-soft);border-color:#b9e3d4}
.box.ps h2,.box.ps h3{color:#0a5a45}
.pill{display:inline-block;font-size:12.5px;font-weight:700;padding:3px 9px;border-radius:99px;background:var(--brand-soft);color:var(--brand-dark)}
.pill.yes{background:#fde8e4;color:#9c2a12}
.pill.no{background:var(--accent-soft);color:#0a5a45}
.pill.maybe{background:var(--warn-soft);color:var(--warn)}

/* grid cards */
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));margin:18px 0}
.card{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;text-decoration:none;color:var(--ink);background:#fff;transition:border-color .15s, box-shadow .15s}
a.card:hover{border-color:var(--brand);box-shadow:0 6px 20px rgba(39,71,184,.08);color:var(--ink)}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--ink-2);font-size:15.5px}
.card .go{display:inline-block;margin-top:10px;font-weight:700;color:var(--brand);font-size:15px}

/* tables */
.table-scroll{overflow-x:auto;margin:16px 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:15.5px;min-width:520px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--bg-soft);font-size:14px;color:var(--ink-2)}
tr:last-child td{border-bottom:0}

/* timeline */
.tl{list-style:none;padding:0;margin:18px 0;border-left:3px solid var(--brand-soft)}
.tl li{position:relative;padding:0 0 22px 22px}
.tl li::before{content:"";position:absolute;left:-9px;top:5px;width:15px;height:15px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.tl li.future::before{border-color:#9aa6c4;border-style:dashed}
.tl li.now::before{background:#f2b705;border-color:#f2b705}
.tl .when{font-weight:800;color:var(--ink)}
.tl p{margin:3px 0 0;color:var(--ink-2)}
.tl .src{font-size:14px}

/* steps */
.steps{counter-reset:s;list-style:none;padding:0}
.steps>li{counter-increment:s;position:relative;padding:2px 0 14px 48px;margin:0}
.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
.steps>li strong{color:var(--ink)}

/* invoice vs data illustration */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}
@media (max-width:700px){.compare{grid-template-columns:1fr}}
.paper{border:1px solid var(--line);border-radius:12px;padding:16px;background:#fff;font-size:14px;box-shadow:0 4px 14px rgba(22,33,62,.06)}
.paper .row{display:flex;justify-content:space-between;border-bottom:1px dashed var(--line);padding:5px 0}
.code{background:#111a33;color:#d6defa;border-radius:12px;padding:16px;font:13px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-x:auto;white-space:pre}
.code .t{color:#8fb2ff}.code .v{color:#9ff0c8}
.cap{font-size:13.5px;color:var(--muted);margin-top:6px}

/* flow diagram */
.flow{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap;margin:18px 0}
.flow .n{flex:1 1 140px;border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff;text-align:center;font-size:14.5px}
.flow .n strong{display:block;font-size:15.5px}
.flow .a{align-self:center;color:var(--brand);font-weight:800}
@media (max-width:700px){.flow{flex-direction:column}.flow .a{transform:rotate(90deg);text-align:center}}

/* FAQ */
details{border:1px solid var(--line);border-radius:12px;padding:0 18px;margin:10px 0;background:#fff}
summary{cursor:pointer;font-weight:700;padding:15px 0;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
details[open] summary::after{content:"–"}
details>div{padding:0 0 14px;color:var(--ink-2)}

/* checker */
.checker{border:2px solid var(--brand-soft);border-radius:18px;padding:22px;background:#fff;margin:22px 0;max-width:720px}
.checker .q{font-size:20px;font-weight:800;margin:4px 0 14px}
.checker .opts{display:grid;gap:10px}
.checker button.opt{font:inherit;text-align:left;padding:14px 16px;border-radius:12px;border:1.5px solid var(--line);background:#fff;cursor:pointer;color:var(--ink)}
.checker button.opt:hover{border-color:var(--brand);background:var(--brand-soft)}
.checker button.opt span{display:block;font-size:14px;color:var(--muted)}
.checker .back{font:inherit;background:none;border:0;color:var(--brand);cursor:pointer;padding:0;margin-top:14px;font-weight:600}
.checker .prog{font-size:13px;color:var(--muted);font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.result h3{margin-top:6px;font-size:22px}
.noscript{display:none}

/* footer */
.cta-band{background:var(--ink);color:#e8ecf8;border-radius:18px;padding:26px;margin:40px 0 10px;display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 6px;font-size:24px}
.cta-band p{margin:0;color:#c8d0e8}
.site-foot{border-top:1px solid var(--line);background:var(--bg-soft);margin-top:30px;padding:30px 0 40px;font-size:14.5px;color:var(--ink-2)}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr}}
.site-foot h4{margin:0 0 8px;font-size:14px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin:5px 0}
.site-foot a{color:var(--ink-2)}
.sources{font-size:14.5px}
.sources li{margin:4px 0}
.crumbs{font-size:14px;color:var(--muted);margin:0 0 4px}
.crumbs a{color:var(--muted)}

/* glossary */
.gloss{margin:18px 0}
.gloss dt{font-weight:800;font-size:18px;margin-top:18px;color:var(--ink)}
.gloss dd{margin:4px 0 0;color:var(--ink-2)}
.crumbs{padding-top:16px}
@media (max-width:600px){table{min-width:0;font-size:14.5px}th,td{padding:9px 10px}.pill{white-space:nowrap}}

/* PaySorted pitch */
.nav a.nav-ps{background:var(--accent);color:#fff;margin-left:6px}
.nav a.nav-ps:hover{background:#0b6f55;color:#fff}
.btn.big{font-size:18px;padding:16px 26px}
.ps-band{max-width:var(--wrap);margin:44px auto 0;padding:0 20px}
.ps-band-in{background:linear-gradient(135deg,#e3f5ef,#f2fbf8);border:1px solid #b9e3d4;border-radius:20px;padding:30px;display:grid;grid-template-columns:1.6fr 1fr;gap:28px;align-items:center}
@media (max-width:800px){.ps-band-in{grid-template-columns:1fr;padding:22px}}
.ps-kicker{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#0a5a45}
.ps-band h2{margin:8px 0 10px;font-size:clamp(24px,3.4vw,32px);color:#0b3d31}
.ps-band p{color:#2c4a42;margin:0 0 12px}
.ticks{list-style:none;padding:0;margin:10px 0 0}
.ticks li{display:flex;gap:10px;align-items:flex-start;margin:9px 0;color:#21403a}
.ticks svg{flex:none;margin-top:3px}
.ps-band-cta{background:#fff;border:1px solid #b9e3d4;border-radius:16px;padding:22px;text-align:center}
.ps-band-cta .btn{display:block}
.ps-band-cta p{font-size:14.5px;margin:12px 0 8px;color:var(--muted)}
.ps-more{font-weight:700;font-size:15px;color:#0a5a45}
.ps-inline{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.ps-inline>div{flex:1 1 320px}
.ps-inline h3{margin:0 0 4px}
.ps-inline p{margin:0}
.box.ps .btn{margin-top:4px}
.head-r{display:flex;gap:8px;align-items:center}
.head-ps{display:none;text-decoration:none;background:var(--accent);color:#fff;font-weight:700;font-size:14.5px;padding:9px 12px;border-radius:10px}
@media (max-width:880px){.head-ps{display:inline-block}.nav a.nav-ps{display:none}}
@media (max-width:360px){.logo small{display:none}}
.nav a{white-space:nowrap}
.logo span{white-space:nowrap}
@media (max-width:1180px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 14px}
  .nav.open{display:flex}
  .nav a{padding:12px 10px}
  .head-ps{display:inline-block}.nav a.nav-ps{display:none}
}
.head-ps{white-space:nowrap}
@media (max-width:600px){.strip .wrap>span:first-child{display:none}}

/* centred reading column */
.article{margin-left:auto;margin-right:auto}
.hero .wrap{max-width:820px}
main>.wrap:first-child .crumbs{max-width:780px;margin-left:auto;margin-right:auto}
.ps-band{max-width:820px}
main>.wrap:last-of-type .cta-band{max-width:780px;margin-left:auto;margin-right:auto}