/* UK Tax Tools – shared design system (2025/26)
   Modern, calculator-first, mobile-friendly. Single source of design truth. */

:root{
  --brand:#0f6f4f;         /* trust green */
  --brand-700:#0b5c42;
  --brand-100:#e7f2ec;
  --brand-050:#f0f7f3;
  --ink:#14202e;
  --muted:#5b6676;
  --bg:#f5f7f6;
  --card:#ffffff;
  --line:#e3e8e5;
  --line-soft:#ecf0ee;
  --amber:#8a5a00; --amber-bg:#fff7e0; --amber-line:#eed9a8;
  --green:#2e7d32; --green-bg:#e8f6ef;
  --red:#b71c1c; --red-bg:#fdeaea; --red-line:#f3c1c1;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(20,32,46,.06), 0 4px 14px rgba(20,32,46,.06);
  --shadow-lg:0 8px 30px rgba(20,32,46,.10);
  --maxw:1080px; --contentw:820px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.wrap--narrow{max-width:var(--contentw);margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line);}
.site-header .bar{display:flex;align-items:center;gap:16px;height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:1.05rem;letter-spacing:-.01em}
.brand .mark{width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:16px;font-weight:800}
.brand .mark span{transform:translateY(-1px)}
.brand:hover{text-decoration:none}
.nav{margin-left:auto;display:flex;gap:4px}
.nav a{padding:8px 13px;border-radius:999px;font-size:.9rem;color:var(--muted);font-weight:600}
.nav a:hover{background:var(--brand-050);color:var(--brand);text-decoration:none}
.nav a.active{background:var(--brand-100);color:var(--brand-700)}

/* ---------- Breadcrumb ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:.8rem;color:var(--muted);margin:16px 0 4px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs span{opacity:.5}

/* ---------- Hero (calculator pages) ---------- */
.hero{margin-top:8px}
.hero .eyebrow{display:inline-flex;align-items:center;gap:6px;background:var(--brand-100);color:var(--brand-700);font-size:.72rem;font-weight:700;padding:4px 11px;border-radius:999px;letter-spacing:.02em}
.hero h1{font-size:clamp(1.5rem,3.4vw,2.1rem);line-height:1.15;letter-spacing:-.02em;margin:12px 0 8px}
.hero .sub{color:var(--muted);font-size:1rem;max-width:62ch}
.trust-row{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 22px}
.trust-row .chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.78rem;color:var(--muted)}
.trust-row .chip b{color:var(--ink);font-weight:600}
.trust-row .chip svg{width:13px;height:13px;color:var(--green)}

/* ---------- Calculator card ---------- */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-bottom:30px}
.calc label{display:block;font-size:.86rem;font-weight:700;color:var(--ink);margin:0 0 6px}
.calc .field{margin-bottom:16px}
.calc input[type=number],.calc select{width:100%;padding:13px 15px;font-size:1.05rem;border:1.4px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink);transition:border-color .15s, box-shadow .15s}
.calc input[type=number]:focus,.calc select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc .check{display:flex;align-items:flex-start;gap:9px;font-size:.88rem;margin-bottom:12px;color:var(--muted);cursor:pointer}
.calc .check input{margin-top:3px;width:16px;height:16px;accent-color:var(--brand)}
.btn{display:inline-block;width:100%;background:var(--brand);color:#fff;border:none;padding:15px;font-size:1.02rem;font-weight:700;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s, transform .05s}
.btn:hover{background:var(--brand-700)}
.btn:active{transform:scale(.995)}
.btn-ghost{background:#fff;color:var(--brand);border:1.4px solid var(--brand);margin-top:10px;font-weight:600;padding:11px}
.btn-ghost:hover{background:var(--brand-050)}
.quick{display:flex;gap:8px;align-items:center;margin-bottom:16px;flex-wrap:wrap}
.quick span{font-size:.78rem;color:var(--muted);font-weight:600}
.chip-btn{width:auto;padding:7px 14px;font-size:.82rem;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:999px;cursor:pointer;transition:border-color .15s, background .15s}
.chip-btn:hover{border-color:var(--brand);background:var(--brand-050);color:var(--brand-700)}

/* ---------- Result ---------- */
.result{display:none;margin-top:20px;border:1px solid var(--green-bg);background:var(--green-bg);border-radius:var(--radius);padding:20px;animation:pop .18s ease-out}
.result.show{display:block}
@keyframes pop{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.result .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 13px;border-radius:999px;font-size:.76rem;font-weight:700;color:#fff;margin-bottom:12px}
.badge.exempt{background:var(--green)}.badge.tapered{background:#e65100}.badge.taxable{background:var(--red)}.badge.over{background:var(--green)}.badge.owe{background:var(--red)}
.result .big{font-size:clamp(1.7rem,4vw,2.3rem);font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.result .big.over{color:var(--green)}
.result .big.owe{color:var(--red)}
.result .big.light{color:var(--green)}
.result .cap{font-size:.82rem;color:var(--muted);margin:2px 0 12px}
.result table{width:100%;border-collapse:collapse;margin-top:6px}
.result td{padding:9px 6px;border-bottom:1px dashed var(--line-soft);font-size:.9rem;color:var(--muted)}
.result td:last-child{text-align:right;font-weight:700;color:var(--ink)}
.result .foot{font-size:.8rem;color:var(--muted);margin-top:12px}
.banner{display:none;background:var(--green-bg);border:1px solid #bfe3d2;border-radius:var(--radius-sm);padding:12px 14px;font-size:.88rem;color:var(--green);margin-bottom:18px}
.banner.show{display:block}
.warnbox{display:none;background:var(--red-bg);border:1px solid var(--red-line);border-radius:var(--radius-sm);padding:13px 15px;font-size:.88rem;color:#8a1a1a;margin-top:14px}
.warnbox.show{display:block}

/* ---------- Content sections ---------- */
h2.sec{font-size:1.2rem;margin:34px 0 12px;letter-spacing:-.01em}
h2.sec a{color:inherit}
p.body{font-size:.96rem;color:var(--ink);margin-bottom:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);margin-bottom:18px}
.card h3{font-size:1rem;margin-bottom:8px}
table.rates{width:100%;border-collapse:collapse;font-size:.88rem;margin:16px 0;background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
table.rates th,table.rates td{border:1px solid var(--line-soft);padding:10px 12px;text-align:left}
table.rates th{background:var(--brand-050);color:var(--brand-700);font-weight:700}
.faq{margin:16px 0}
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:9px;padding:14px 16px;background:#fff;transition:border-color .15s}
.faq details[open]{border-color:var(--brand);box-shadow:var(--shadow)}
.faq summary{font-weight:600;cursor:pointer;font-size:.94rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.2rem;color:var(--muted);transition:transform .15s}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--brand)}
.faq p{font-size:.9rem;margin-top:10px;color:var(--muted)}
.note{background:var(--amber-bg);border:1px solid var(--amber-line);border-radius:var(--radius-sm);padding:14px 16px;font-size:.87rem;color:var(--amber);margin:20px 0}
.note a{color:var(--amber);text-decoration:underline}
pre.code{background:#0f1b26;color:#d6e4dc;border-radius:var(--radius-sm);padding:16px;font-size:.8rem;overflow-x:auto;margin:14px 0;line-height:1.55}
ul.check{list-style:none}
ul.check li{padding:5px 0;font-size:.92rem}
ul.check li::before{content:"✓ ";color:var(--brand);font-weight:700}
ul.cardlist{list-style:none}
ul.cardlist li{padding:5px 0;font-size:.93rem;border-bottom:1px dashed var(--line-soft)}
ul.cardlist li::before{content:"▸ ";color:var(--brand)}

/* ---------- Home page ---------- */
.hero-home{background:linear-gradient(180deg,var(--brand) 0%,var(--brand-700) 100%);color:#fff;border-radius:var(--radius);padding:34px 30px;margin:22px 0 26px;box-shadow:var(--shadow-lg)}
.hero-home h1,.hero-home h2{font-size:clamp(1.4rem,3.4vw,1.9rem);line-height:1.2;letter-spacing:-.02em;max-width:22ch}
.hero-home p{opacity:.94;margin-top:10px;max-width:60ch}
.rates-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:26px}
.rates-card h2{font-size:1.05rem;margin-bottom:14px}
.rates-card .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.rates-card .item{background:var(--brand-050);border-radius:12px;padding:14px 16px;font-size:.82rem;color:var(--muted)}
.rates-card .item b{display:block;font-size:1.25rem;color:var(--brand-700);font-weight:800;letter-spacing:-.02em;margin-bottom:2px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px;margin-bottom:32px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .12s, box-shadow .12s}
.tool:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.tool h3{font-size:1.05rem;margin:10px 0 6px;letter-spacing:-.01em}
.tool p{font-size:.9rem;color:var(--muted);flex:1}
.tool .tag{display:inline-block;font-size:.7rem;background:var(--brand-100);color:var(--brand-700);border-radius:999px;padding:4px 11px;font-weight:700;align-self:flex-start}
.tool a.btn{margin-top:16px}
.clusters{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:30px}
.cluster{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.cluster h3{font-size:.95rem;margin-bottom:10px}
.cluster ul{list-style:none}
.cluster li{font-size:.86rem;color:var(--muted);padding:4px 0}
.cluster li.live::before{content:"● ";color:var(--green)}
.cluster li.soon::before{content:"○ ";color:#b9c2bd}
.cluster li a{color:var(--brand);font-weight:500}
.sec-head{font-size:1.15rem;margin:32px 0 4px;letter-spacing:-.01em;border-bottom:2px solid var(--line);padding-bottom:8px}

/* ---------- Ad slot (reserved space to avoid CLS) ---------- */
.ad-slot{min-height:120px;margin:22px 0;border:1px dashed var(--line);border-radius:var(--radius-sm);display:grid;place-items:center;color:var(--muted);font-size:.72rem;background:repeating-linear-gradient(45deg,#fafbfa,#fafbfa 12px,#f2f5f3 12px,#f2f5f3 24px)}

/* ---------- Footer ---------- */
.site-footer{margin-top:48px;border-top:1px solid var(--line);background:#fff;padding:34px 0 90px}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:24px;margin-bottom:24px}
.foot-grid h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:10px}
.foot-grid ul{list-style:none}
.foot-grid li{padding:3px 0;font-size:.88rem}
.foot-grid a{color:var(--muted)}
.foot-grid a:hover{color:var(--brand)}
.foot-legal{font-size:.8rem;color:var(--muted);padding-top:16px;border-top:1px solid var(--line-soft);line-height:1.7}
.foot-legal a{color:var(--muted);text-decoration:underline}

/* ---------- Sticky mobile nav ---------- */
.stickynav{position:fixed;left:0;right:0;bottom:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-top:1px solid var(--line);display:none;padding:8px 12px calc(8px + env(safe-area-inset-bottom));gap:8px}
.stickynav a{flex:1;text-align:center;font-size:.78rem;padding:11px 4px;border-radius:var(--radius-sm);color:var(--brand);font-weight:700;background:var(--brand-050)}
.stickynav a:hover{background:var(--brand-100);text-decoration:none}

@media (max-width:720px){
  .nav{margin-left:auto}
  .nav a{padding:8px 9px;font-size:.82rem}
  .nav .hide-m{display:none}
  .calc .row{grid-template-columns:1fr}
  .site-footer{padding-bottom:96px}
  .stickynav{display:flex}
  .hero h1{margin-top:10px}
}

/* ---------- Cookie consent banner ---------- */
.consent-banner{position:fixed;left:0;right:0;bottom:0;z-index:100;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 22px rgba(20,32,46,.14);padding:16px 22px;display:flex;gap:22px;align-items:center;flex-wrap:wrap;font-size:.9rem;color:var(--ink)}
.consent-banner p{flex:1;min-width:240px;margin:0}
.consent-banner a{color:var(--brand);text-decoration:underline}
.consent-banner .c-actions{display:flex;gap:10px}
.consent-banner .btn{width:auto;padding:11px 24px}
.consent-banner .btn-ghost{margin-top:0}
@media (max-width:640px){.consent-banner{flex-direction:column;align-items:stretch;gap:12px}}