/*
Theme Name: VAT Calculator 1a
Theme URI: https://calculatethevat.co.uk
Author: WDMC Tech
Author URI: https://wdmctech.com
Description: Clean-fintech theme for a UK VAT Calculator site (design direction "1a"). Full-width layout with a fixed hero + live VAT calculator, styled landing pages (VAT Rates, What is VAT?, VAT Threshold) with a shared component system, a slim footer, and FAQ/WebApplication/Breadcrumb schema. Public Sans + IBM Plex Mono.
Version: 1.2.0
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: vatcalc1a
*/

/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --navy:      #0B1F3A;
  --navy-btn:  #10294d;
  --accent:    #2f6df6;
  --tint:      #eaf1ff;
  --tint-2:    #f4f8fe;
  --text:      #3f4a5a;
  --muted:     #64748b;
  --muted-2:   #94a3b8;
  --hair:      #e2e8f0;
  --hair-2:    #eef2f6;
  --hair-3:    #dbe3ec;
  --surface:   #f8fafc;
  --amber:     #e08a1e;
  --amber-bg:  #fff7ed;
  --amber-brd: #fbdcb0;
  --ok-bg:     #e7f3ec;
  --ok-fg:     #178a4e;
  --font: 'Public Sans', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --shadow-card: 0 18px 44px -16px rgba(11,31,58,.30);
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* full-bleed sections never cause a sideways scroll */
}
img { max-width: 100%; height: auto; }
input::placeholder { color: #b8c1cc; }

/* --------------------------------------------------------------------------
   Layout: full-bleed sections, centered readable column with side padding.
   .wrap keeps horizontal padding at every width, so text never touches the
   screen edge on mobile.
   -------------------------------------------------------------------------- */
.wrap { width: 100%; max-width: 760px; margin-inline: auto; padding-inline: 24px; }
.wrap--wide { max-width: 1080px; }
@media (max-width: 600px) { .wrap { padding-inline: 20px; } }

/* ---------------------------------------------------------------- Top nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--hair-2);
}
.nav__inner {
  max-width: 1080px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 11px;
  font-weight: 800; font-size: 17px; letter-spacing: -.01em;
  color: var(--navy); text-decoration: none;
}
.brand__mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--navy-btn); color: #fff;
  display: grid; place-items: center; font-size: 14px; font-weight: 800;
  flex: none;
}
.nav__links {
  display: flex; gap: 26px; align-items: center;
  list-style: none; margin: 0; padding: 0;
  font-size: 14px; font-weight: 500;
}
.nav__links li { list-style: none; }
.nav__links a { color: #475569; text-decoration: none; }
.nav__links a:hover { color: var(--accent); }

main { display: block; }

/* ---------------------------------------------------------------- Hero */
.hero {
  background: linear-gradient(180deg, var(--surface), #fff);
  border-bottom: 1px solid var(--hair-2);
}
.hero__grid {
  display: grid; grid-template-columns: 0.82fr 1.18fr; gap: 40px;
  padding-top: 52px; padding-bottom: 60px; align-items: start;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font: 600 11px var(--font); color: var(--accent);
  background: var(--tint); border-radius: 999px; padding: 5px 11px; letter-spacing: .02em;
}
.hero__intro h1 {
  font-size: 44px; line-height: 1.04; font-weight: 800; letter-spacing: -.025em;
  margin: 16px 0 0; color: var(--navy);
}
.lede { font-size: 16px; line-height: 1.55; color: #475569; margin: 16px 0 0; max-width: 340px; }
.ticks { list-style: none; margin: 24px 0 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ticks li { display: flex; align-items: center; gap: 9px; font: 500 13px var(--font); color: #475569; }
.tick {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--ok-bg); color: var(--ok-fg);
  display: grid; place-items: center; font-size: 11px; font-weight: 800; flex: none;
}

/* ---------------------------------------------------------------- Calculator
   (markup and behaviour unchanged) */
.calc {
  background: #fff; border: 1px solid var(--hair); border-radius: 18px;
  box-shadow: var(--shadow-card); padding: 24px;
}
.seg { display: flex; background: #f1f5f9; border-radius: 11px; padding: 4px; gap: 4px; }
.seg__btn {
  flex: 1; border: none; cursor: pointer; padding: 11px; border-radius: 8px;
  font: 700 14px var(--font); color: #475569; background: transparent; transition: .15s;
}
.seg__btn.is-active { background: var(--navy-btn); color: #fff; }
.mode-hint { font: 500 11px var(--font); color: var(--muted-2); text-align: center; margin: 9px 0 0; }

.field { margin-top: 18px; }
.field > label {
  display: block; font: 700 11px var(--font); color: var(--muted);
  letter-spacing: .06em; text-transform: uppercase;
}
.amount {
  display: flex; align-items: center;
  border: 1.5px solid var(--hair-3); border-radius: 13px; padding: 0 16px; margin-top: 8px; background: #fff;
}
.amount:focus-within { border-color: var(--accent); }
.amount__sign { font: 600 26px var(--mono); color: var(--muted-2); }
.amount input {
  border: none; outline: none; flex: 1; min-width: 0;
  font: 700 30px var(--mono); padding: 15px 6px; color: var(--navy); background: transparent;
}
.rates { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin-top: 8px; }
.rate {
  border: 1px solid var(--hair-3); cursor: pointer; padding: 9px 4px; border-radius: 9px;
  font: 700 13px var(--font); background: #fff; color: #475569; transition: .12s;
}
.rate:hover { border-color: #b9cbe8; }
.rate.is-active { background: var(--navy-btn); color: #fff; border-color: var(--navy-btn); }
.custom {
  display: flex; align-items: center;
  border: 1.5px solid var(--hair-3); border-radius: 10px; padding: 0 14px; margin-top: 8px;
}
.custom:focus-within { border-color: var(--accent); }
.custom input {
  border: none; outline: none; flex: 1; min-width: 0;
  font: 600 16px var(--mono); padding: 10px 4px; background: transparent; color: var(--navy);
}
.custom__pct { font: 600 16px var(--mono); color: var(--muted-2); }
.results {
  margin-top: 20px; background: var(--surface); border: 1px solid var(--hair-2);
  border-radius: var(--radius); padding: 6px 16px 14px;
}
.results__row { display: flex; justify-content: space-between; align-items: center; }
.results__row:not(.results__row--total) { padding: 11px 0; border-bottom: 1px solid var(--hair-2); }
.results__label { font: 500 14px var(--font); color: var(--muted); }
.results__val { font: 600 17px var(--mono); color: #334155; }
.results__row--vat { padding: 11px 12px; margin: 8px -6px; background: var(--tint); border-radius: 9px; border-bottom: none; }
.results__row--vat .results__label { font-weight: 700; color: var(--navy-btn); }
.results__row--vat .results__val   { font-weight: 700; color: var(--navy-btn); }
.results__row--total { align-items: baseline; padding-top: 9px; border-top: 1px solid var(--hair); margin-top: 2px; }
.results__row--total .results__label { font: 800 15px var(--font); color: var(--navy); }
.results__val--big { font: 700 28px var(--mono); color: var(--navy); letter-spacing: -.01em; }
.copy {
  margin-top: 14px; width: 100%; border: none; cursor: pointer;
  background: var(--navy-btn); color: #fff; padding: 15px; border-radius: 13px;
  font: 700 15px var(--font); display: flex; align-items: center; justify-content: center; gap: 8px; transition: .15s;
}
.copy:hover { background: #0d2244; }
.copy.is-copied { background: var(--ok-fg); }

/* ---------------------------------------------------------------- Title band (inner pages) */
.titleband {
  background: linear-gradient(180deg, var(--tint-2), #fff);
  border-bottom: 1px solid var(--hair-2);
  padding: 34px 0 30px;
}
.crumb { font: 500 12.5px var(--font); color: var(--muted); display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumb a { color: var(--accent); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.crumb__sep { color: var(--muted-2); }
.crumb__current { color: var(--muted); }
.page-h1 {
  font-size: 40px; font-weight: 800; letter-spacing: -.025em;
  margin: 12px 0 0; color: var(--navy); line-height: 1.08;
}

/* ---------------------------------------------------------------- Content / prose */
.content { padding: 30px 0 8px; }
.content > *:first-child { margin-top: 0; }

/* Lead intro: the first paragraph of a page reads as a subhead */
.content > p:first-child { font-size: 19px; line-height: 1.65; color: #475569; }

.content h2 { font-size: 26px; font-weight: 800; letter-spacing: -.02em; margin: 34px 0 0; color: var(--navy); line-height: 1.2; }
.content h3 { font-size: 19px; font-weight: 800; margin: 28px 0 12px; color: var(--navy); }
.content h4 { font-size: 16px; font-weight: 800; margin: 22px 0 8px; color: var(--navy); }
.content p  { font-size: 16px; line-height: 1.75; margin: 14px 0 0; color: var(--text); }
.content a  { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.content a:hover { color: #1d54d8; }
.content strong, .content b { color: var(--navy); font-weight: 700; }
.content ul, .content ol { font-size: 16px; line-height: 1.8; color: var(--text); margin: 14px 0 0; padding-left: 22px; }
.content li { margin: 4px 0; }
.content li::marker { color: var(--muted-2); }

/* ---- Formula box: <div class="vat-formula"> ---- */
.content .vat-formula {
  background: var(--navy); color: #fff;
  border-radius: 16px; padding: 22px 26px; margin: 26px 0;
}
.content .vat-formula > :first-child { margin-top: 0; }
.content .vat-formula p, .content .vat-formula div, .content .vat-formula span { color: #fff; }
.content .vat-formula strong, .content .vat-formula b { color: #fff; }
.content .vat-formula p:first-of-type,
.content .vat-formula strong:first-child {
  font-family: var(--mono); font-size: 20px; font-weight: 700; letter-spacing: -.01em;
}
.content .vat-formula em, .content .vat-formula small, .content .vat-formula .example {
  display: block; color: #c6d3e6; font-style: normal; font-size: 14.5px; line-height: 1.6; margin-top: 8px;
}
.content .vat-formula a { color: #a9c6ff; }

/* ---- Callout box: <div class="vat-callout"> ---- */
.content .vat-callout {
  position: relative;
  background: var(--amber-bg); border: 1px solid var(--amber-brd); border-left: 4px solid var(--amber);
  border-radius: 12px; padding: 16px 18px 16px 50px; margin: 26px 0; color: #6b5228;
}
.content .vat-callout::before {
  content: "!"; position: absolute; left: 16px; top: 16px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--amber); color: #fff; display: grid; place-items: center;
  font: 800 13px var(--font);
}
.content .vat-callout > :first-child { margin-top: 0; }
.content .vat-callout p { color: #6b5228; }
.content .vat-callout strong, .content .vat-callout b { color: #8a5410; }

/* ---- Tables (wrapped in .table-scroll by the theme) ---- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 22px 0 0; border-radius: 12px; }
.content table {
  width: 100%; min-width: 460px; border-collapse: separate; border-spacing: 0;
  border: 1px solid var(--hair); border-radius: 12px; overflow: hidden; margin: 0; background: #fff;
}
.content th, .content td { border: 0; text-align: left; padding: 12px 16px; }
.content thead th {
  background: var(--surface); border-bottom: 1px solid var(--hair);
  font: 700 11.5px var(--font); color: var(--muted); letter-spacing: .04em; text-transform: uppercase;
}
.content tbody td { font-size: 14.5px; color: var(--text); border-bottom: 1px solid var(--hair-2); }
.content tbody tr:last-child td { border-bottom: none; }
.content tbody tr:nth-child(even) td { background: #fbfcfe; }

/* ---- FAQ accordion: native <details><summary> ---- */
.content details {
  border: 1px solid var(--hair); border-radius: 12px; background: #fff;
  margin-top: 10px; overflow: hidden;
}
.content details + details { margin-top: 10px; }
.content summary {
  list-style: none; cursor: pointer; user-select: none;
  padding: 16px 18px; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  font: 700 15.5px var(--font); color: var(--navy);
}
.content summary::-webkit-details-marker { display: none; }
.content summary::marker { content: ""; }
.content summary::after {
  content: ""; flex: none; width: 9px; height: 9px; margin-right: 2px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(45deg); transition: transform .2s ease;
}
.content details[open] summary::after { transform: rotate(225deg); }
.content details[open] summary { border-bottom: 1px solid var(--hair-2); }
.content summary:hover { background: #fbfcfe; }
.content details > p { margin: 0; padding: 14px 18px 16px; font-size: 15px; line-height: 1.7; color: var(--text); }

.plainlink { text-decoration: none; color: inherit; }

/* ---------------------------------------------------------------- Slim footer */
.site-foot { border-top: 1px solid var(--hair-2); background: #fff; margin-top: 48px; }
.site-foot__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 26px; padding-bottom: 26px;
}
.site-foot .brand { font-size: 16px; }
.site-foot__copy { margin: 0; font: 500 13.5px var(--font); color: var(--muted); }

/* ---------------------------------------------------------------- Responsive */
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 26px; padding-top: 34px; padding-bottom: 42px; }
  .hero__intro h1 { font-size: 34px; }
  .lede { max-width: none; }
}
@media (max-width: 600px) {
  .page-h1 { font-size: 30px; }
  .content h2 { font-size: 23px; }
  .content > p:first-child { font-size: 17px; }
  .amount input { font-size: 26px; }
  .nav__inner { padding: 12px 20px; }
  .nav__links { gap: 16px; font-size: 13px; }
  .site-foot__inner { flex-direction: column; align-items: flex-start; gap: 10px; }
}
@media (max-width: 400px) {
  .nav__links { display: none; }
}