/* Tokens: glaze colours from the studio's own shelves */
:root {
  --porcelain: #f4f6f3;   /* page */
  --slip: #e1e7e2;        /* rules, quiet fills */
  --ink: #1b2420;         /* text */
  --ash: #4d5852;         /* secondary text, 7:1 on porcelain */
  --cobalt: #2343a0;      /* accent, focus, the "differs" stripe */
  --cobalt-ink: #ffffff;
  --celadon: #d6e6da;     /* highlight wash for rows that differ */
  --surface: #ffffff;

  --font: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, sans-serif;
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.5625rem;
  --step-3: clamp(2rem, 6vw, 3.05rem);
  --space: clamp(1rem, 3vw, 1.5rem);
  --radius: 6px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --porcelain: #151c19;
    --slip: #2b3631;
    --ink: #e6ece8;
    --ash: #aab5af;
    --cobalt: #a9bdf7;
    --cobalt-ink: #10183a;
    --celadon: #22362b;
    --surface: #1b2420;
  }
}

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

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

body {
  margin: 0;
  background: var(--porcelain);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.55;
  overflow-wrap: break-word;
}

h1, h2, h3 { line-height: 1.2; margin: 0; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Focus: one consistent, high-contrast ring on every interactive element */
:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
  border-radius: 2px;
}
h2:focus { outline: none; }
h2:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 6px; }

.skip-link {
  position: absolute;
  left: var(--space);
  top: -100px;
  background: var(--cobalt);
  color: var(--cobalt-ink);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-weight: 700;
  z-index: 10;
}
.skip-link:focus { top: var(--space); }

/* Layout */
.site-header,
main,
.site-footer {
  width: min(100% - 2 * var(--space), 68rem);
  margin-inline: auto;
}

.site-header { padding-block: var(--space); border-bottom: 1px solid var(--slip); }
.studio-name { margin: 0; font-weight: 700; }

.intro { padding-block: clamp(2rem, 6vw, 3.5rem) var(--space); max-width: 40rem; }
.intro h1 { font-size: var(--step-3); letter-spacing: -0.01em; }
.lead { font-size: var(--step-1); color: var(--ash); margin: 0.75rem 0 0; }

/* Plan summaries */
.plan-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  border-top: 2px solid var(--ink);
}
.plan {
  padding: var(--space) var(--space) var(--space) 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}
.plan + .plan { border-top: 1px solid var(--slip); }
@media (min-width: 48rem) {
  .plan + .plan { border-top: 0; border-left: 1px solid var(--slip); padding-left: var(--space); }
}
.plan-name { font-size: var(--step-1); }
.plan-price { margin: 0; color: var(--ash); }
.amount { font-size: var(--step-2); font-weight: 700; color: var(--ink); }
.plan-note { margin: 0 0 0.75rem; color: var(--ash); }

.btn {
  margin-top: auto;
  align-self: flex-start;
  font: inherit;
  font-weight: 700;
  padding: 0.6rem 1.1rem;
  min-height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--cobalt);
  background: transparent;
  color: var(--cobalt);
  cursor: pointer;
}
.btn:hover { background: var(--cobalt); color: var(--cobalt-ink); }

.choice-status { min-height: 1.55em; margin: 0.5rem 0 0; color: var(--ash); }

/* Comparison */
.compare { padding-block: clamp(2rem, 5vw, 3rem); }
.compare-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1rem var(--space);
  margin-bottom: 1rem;
}
.compare-head h2 { font-size: var(--step-2); }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; }

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font: inherit;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 999px;
  padding: 0.45rem 1rem 0.45rem 0.5rem;
  min-height: 44px;
  cursor: pointer;
}
.toggle-track {
  width: 2.5rem; height: 1.4rem;
  border-radius: 999px;
  background: var(--slip);
  border: 2px solid var(--ink);
  position: relative;
  flex: none;
}
.toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: calc(1.4rem - 8px); height: calc(1.4rem - 8px);
  border-radius: 50%;
  background: var(--ink);
  transition: transform 160ms ease;
}
.toggle[aria-pressed="true"] .toggle-track { background: var(--cobalt); border-color: var(--cobalt); }
.toggle[aria-pressed="true"] .toggle-thumb { transform: translateX(1.1rem); background: var(--cobalt-ink); }

.diff-status { margin: 0; color: var(--ash); }

/* The table, wide screens */
.plan-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: var(--surface);
}
.plan-table th,
.plan-table td {
  text-align: left;
  vertical-align: top;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--slip);
  min-width: 0;
}
.plan-table thead th {
  font-size: var(--step-1);
  border-bottom: 2px solid var(--ink);
  background: var(--porcelain);
}
.col-feature { width: 34%; }
.group-row th {
  font-size: var(--step-0);
  font-weight: 700;
  padding-top: 1.5rem;
  background: var(--porcelain);
  color: var(--ash);
}
.feature-row th { font-weight: 400; }

.cell-plan { display: none; }
.cell-value { display: inline-flex; align-items: baseline; gap: 0.35rem; }
.icon {
  width: 1em; height: 1em;
  flex: none;
  align-self: center;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Tags written by script.js, shown only while highlighting */
.tag {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0 0.45rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 700;
  vertical-align: 0.1em;
}
.tag[hidden] { display: none; }
.tag-diff { background: var(--cobalt); color: var(--cobalt-ink); }
.tag-same { border: 1px solid var(--ash); color: var(--ash); font-weight: 400; }

/* Highlight state: colour + a stripe + a text tag, never colour alone */
.plan-table .feature-row > * { transition: background-color 160ms ease, color 160ms ease; }
.plan-table[data-diff="on"] .is-diff > * { background: var(--celadon); }
.plan-table[data-diff="on"] .is-diff > th { box-shadow: inset 5px 0 0 var(--cobalt); font-weight: 700; }
.plan-table[data-diff="on"] .is-same > * { color: var(--ash); }

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

/* Narrow screens: each feature becomes a block — name on top, three plans side by side under it.
   Explicit ARIA roles in the markup keep the table semantics when display changes. */
@media (max-width: 40rem) {
  .plan-table,
  .plan-table tbody,
  .plan-table tr,
  .plan-table th,
  .plan-table td { display: block; }

  .plan-table { background: transparent; }

  .plan-table thead {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .group-row th {
    padding: 1.5rem 0 0.5rem;
    border-bottom: 2px solid var(--ink);
    color: var(--ink);
    font-size: var(--step-1);
  }

  .plan-table .feature-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    background: var(--surface);
    border-bottom: 1px solid var(--slip);
  }
  .feature-row > th {
    grid-column: 1 / -1;
    padding: 0.75rem 0.75rem 0.25rem;
    border: 0;
    font-weight: 700;
  }
  .feature-row > td {
    padding: 0.25rem 0.5rem 0.75rem;
    border: 0;
    overflow-wrap: break-word;
    hyphens: auto;
  }
  .feature-row > td + td { border-left: 1px solid var(--slip); }

  .cell-plan {
    display: block;
    font-size: 0.875rem;
    color: var(--ash);
  }
  .cell-value { display: flex; flex-wrap: wrap; }

  .plan-table[data-diff="on"] .is-diff > th { box-shadow: none; }
  .plan-table[data-diff="on"] .is-diff { box-shadow: inset 5px 0 0 var(--cobalt); }
  .plan-table[data-diff="on"] .is-diff > :first-child { padding-left: calc(0.75rem + 5px); }
}

.site-footer {
  padding-block: var(--space) 2.5rem;
  border-top: 1px solid var(--slip);
  color: var(--ash);
}
.site-footer p { margin: 0; }

@media (forced-colors: active) {
  .tag-diff, .toggle[aria-pressed="true"] .toggle-track { forced-color-adjust: none; background: Highlight; color: HighlightText; }
  .plan-table[data-diff="on"] .is-diff > th { border-left: 5px solid Highlight; }
}