/* Tutica: structural styles. Design tokens first; change a colour or size here and it changes
   everywhere. The Light / Dark palettes and presentation are in design.css, loaded after this. */

@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("../fonts/atkinson-hyperlegible-next-400.63730b9efc0d.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("../fonts/atkinson-hyperlegible-next-700.fed09c9882e4.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Colour */
  --paper: #ffffff;        /* page background */
  --grid: #e4eaf2;         /* table rules and borders */
  --ink: #1c2b45;          /* text */
  --ink-soft: #4a5872;     /* secondary text (7:1 on white) */
  --biro: #2b55c9;         /* links and buttons */
  --highlighter: #ffe35a;  /* the one accent: marks the newest series */
  --teal-pale: #e1eded;    /* the row under the cursor */
  --teal: #137475;         /* brand colour (design.css sets the live value) */

  /* Type */
  --font: "Atkinson Hyperlegible Next", system-ui, -apple-system, "Segoe UI", sans-serif;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.25rem;
  --text-xl: 1.625rem;
  --text-2xl: clamp(1.75rem, 1.2rem + 2.2vw, 2.5rem);
  --text-hero: clamp(1.6875rem, 1.2rem + 2.2vw, 2.5rem); /* home page heading */

  /* Space and layout */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --radius: 6px;
  --page-width: 72rem;
  --measure: 68ch;         /* comfortable line length for reading */
  --focus: 3px solid var(--biro);
}

/* Base ------------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.55;
}

main {
  flex: 1;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-4);
}

h1 {
  font-size: var(--text-2xl);
}

h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
}

p,
ul {
  margin: 0 0 var(--space-4);
}

a {
  color: var(--biro);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

img {
  max-width: 100%;
  height: auto;
}

/* The hidden attribute always wins, even over an element's own display rule. */
[hidden] {
  display: none !important;
}

.wrap {
  width: 100%;
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.page {
  padding-top: var(--space-6);
  padding-bottom: var(--space-12);
}

.prose > * {
  max-width: var(--measure);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -3rem;
  padding: var(--space-2) var(--space-4);
  background: var(--paper);
  z-index: 10;
}

.skip-link:focus {
  top: var(--space-2);
}

/* Header and footer ------------------------------------------------------ */

.site-header {
  border-bottom: 1px solid var(--grid);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap; /* if the name and menu can't share a line, the menu drops below */
  align-items: center;
  justify-content: space-between;
  column-gap: var(--space-4);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

@media (max-width: 30rem) {
  .site-header__inner {
    column-gap: var(--space-3); /* a little more room for the name on small phones */
  }
}

/* The site name, linked home: plain text in the site's font, as on the sister site (Ben, 13 Oct 2026). */
.site-header__name {
  display: inline-block;
  color: var(--ink);
  font-size: calc(var(--text-hero) * 1.08);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap; /* always one line */
  padding: var(--space-2) 0;
}

.site-header__name:hover {
  text-decoration: underline;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  padding: var(--space-2) 0;
}

.site-nav a:hover {
  color: var(--biro);
  text-decoration: underline;
}

.site-footer {
  border-top: 1px solid var(--grid);
  color: var(--ink-soft);
  font-size: var(--text-sm);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: var(--space-8);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.site-footer p {
  margin: 0 0 var(--space-2);
}

.site-footer__links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-2);
}

/* Home ------------------------------------------------------------------ */

.hero {
  padding: var(--space-12) 0;
}

/* The home heading. */
.hero__title {
  font-size: var(--text-hero); /* 27px minimum so line 3 fits a 360px phone */
  text-wrap: balance; /* if a line still has to wrap, split it evenly */
}

.hero__lead {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}

.choose {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-4);
  scroll-margin-top: var(--space-4);
}

.choose__card {
  background: var(--paper);
  border: 1px solid var(--grid);
  border-top: 4px solid var(--teal);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-6) var(--space-6);
}

.choose__title {
  font-size: var(--text-xl);
  margin: 0 0 var(--space-3);
}

.choose__boards {
  list-style: none;
  padding: 0;
  margin: 0;
}

.choose__boards a {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-lg);
  font-weight: 700;
}

/* A card that is one link (a qualification with one exam board): just the title, in ink, the whole card lit
   under the cursor. */
.choose__card--link {
  display: block;
  color: var(--ink);
  text-decoration: none;
}

.choose__card--link .choose__title {
  margin-bottom: 0;
}

.choose__card--link:hover,
.choose__card--link:focus-visible {
  background: var(--teal-pale);
  border-color: var(--teal);
}

.choose__card--link:hover .choose__title {
  text-decoration: underline;
}

/* A note under the cards. */
.choose__note {
  margin: var(--space-6) 0 0;
  color: var(--ink-soft);
}

/* A level's group of cards on the home page (GCSE, A Level). */
.level__title {
  margin: var(--space-8) 0 var(--space-4);
}

/* Board page ------------------------------------------------------------ */

.breadcrumbs {
  font-size: var(--text-sm);
  color: var(--ink-soft);
  margin-bottom: var(--space-4);
}

.spec-code {
  font-weight: 400;
  color: var(--ink-soft);
}

.board-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
}

.board-bar__formulae {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Two-way switch (Foundation | Higher). Plain links, no JavaScript. */
.switch {
  display: inline-flex;
  border: 2px solid var(--biro);
  border-radius: var(--radius);
  overflow: hidden;
}

.switch a {
  padding: var(--space-2) var(--space-4);
  font-weight: 700;
  text-decoration: none;
  min-width: 6.5rem;
  text-align: center;
}

.switch a + a {
  border-left: 2px solid var(--biro);
}

.switch a[aria-current="page"] {
  background: var(--biro);
  color: var(--paper);
}

.switch a:not([aria-current]):hover {
  background: var(--grid);
}

.switch a:focus-visible {
  outline-offset: -5px;
  outline-color: var(--highlighter);
}

/* The paper grid: one row per series, one column per paper. */
.paper-grid-scroll {
  overflow-x: auto;
}

.paper-grid {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.paper-grid th,
.paper-grid td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--grid);
}

/* Column headings wrap (long paper names) rather than forcing a sideways scroll. */
.paper-grid thead th {
  font-size: var(--text-sm);
  border-bottom: 2px solid var(--ink);
}

.paper-grid tbody th {
  white-space: nowrap;
}

.paper-grid tbody th a {
  color: var(--ink);
  font-weight: 700;
}

/* The row you're looking at… */
.paper-grid tbody tr:hover > *,
.paper-grid tbody tr:focus-within > * {
  background: var(--teal-pale);
}

/* …and the newest series, marked like a highlighter pen across the name. */
.is-newest th a {
  background: var(--highlighter);
  padding: 0 var(--space-1);
  margin: 0 calc(-1 * var(--space-1));
  box-decoration-break: clone;
}

.newest-tag {
  display: block;
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--ink-soft);
}

.doc-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
}

.doc-link {
  display: inline-block;
  padding: var(--space-1) 0;
}

/* Phones: each series becomes its own block with its papers listed inside. */
@media (max-width: 44rem) {
  .paper-grid,
  .paper-grid tbody,
  .paper-grid tr,
  .paper-grid th,
  .paper-grid td {
    display: block;
  }

  .paper-grid thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .paper-grid tbody tr {
    border: 1px solid var(--grid);
    border-radius: var(--radius);
    margin-bottom: var(--space-4);
    overflow: hidden;
  }

  .paper-grid tbody th {
    font-size: var(--text-lg);
    background: var(--paper);
    border-bottom: 2px solid var(--ink);
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
  }

  .newest-tag {
    display: inline;
  }

  .paper-grid td {
    display: grid;
    grid-template-columns: minmax(6rem, 40%) 1fr;
    gap: var(--space-4);
  }

  .paper-grid td::before {
    content: attr(data-label);
    font-weight: 700;
  }

  .paper-grid td:last-child {
    border-bottom: 0;
  }

  .paper-grid td.is-empty {
    display: none;
  }
}

/* Specs with many papers: the phone layout at every
   width, with the series blocks two across when there's room. Keep these rules
   the same as the phone rules above. */
.paper-grid--stacked,
.paper-grid--stacked tbody,
.paper-grid--stacked tr,
.paper-grid--stacked th,
.paper-grid--stacked td {
  display: block;
}

.paper-grid--stacked thead {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.paper-grid--stacked tbody tr {
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
  overflow: hidden;
}

.paper-grid--stacked tbody th {
  font-size: var(--text-lg);
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.paper-grid--stacked .newest-tag {
  display: inline;
}

.paper-grid--stacked td {
  display: grid;
  grid-template-columns: minmax(6rem, 40%) 1fr;
  gap: var(--space-4);
}

.paper-grid--stacked td::before {
  content: attr(data-label);
  font-weight: 700;
}

.paper-grid--stacked td:last-child {
  border-bottom: 0;
}

.paper-grid--stacked td.is-empty {
  display: none;
}

@media (min-width: 60rem) {
  .paper-grid--stacked tbody {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
    align-items: start;
  }

  .paper-grid--stacked tbody tr {
    margin-bottom: 0;
  }
}

/* Series page ------------------------------------------------------------ */

.series-group h2 {
  margin-top: var(--space-6);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--ink);
}

.series-papers {
  list-style: none;
  padding: 0;
}

.series-paper {
  display: grid;
  grid-template-columns: minmax(8rem, 16rem) 1fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--grid);
  font-variant-numeric: tabular-nums;
}

.series-paper:hover {
  background: var(--teal-pale);
}

.series-paper__name {
  font-weight: 700;
}

.series-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin: var(--space-8) 0 var(--space-4);
}

.series-nav__newer {
  margin-left: auto;
}

/* Other pages ------------------------------------------------------------ */

.company {
  font-style: normal;
  color: var(--ink-soft);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}