/* petwaterfountainpicks.com - one stylesheet, mobile-first, system fonts, WCAG AA contrast. */
:root {
  --ink: #1b2428;        /* 15:1 on white */
  --muted: #4d5b61;      /* 7:1 on white */
  --bg: #ffffff;
  --soft: #f2f7f8;
  --line: #d3dfe2;
  --brand: #0b6e79;      /* 5.9:1 on white */
  --brand-dark: #08525a;
  --accent: #8a4b00;     /* CTA text, 7:1 on white */
  --radius: 10px;
  --wrap: 72rem;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); background: var(--bg);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--brand); text-underline-offset: .15em; }
a:hover { color: var(--brand-dark); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1rem; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: .5rem; background: #fff; padding: .5rem 1rem; z-index: 10; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header / nav */
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.5rem; padding-top: .75rem; padding-bottom: .75rem; }
.brand { display: inline-flex; align-items: center; gap: .5rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.site-header nav ul, .site-footer nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
.site-header nav a { display: inline-block; padding: .35rem 0; color: var(--ink); text-decoration: none; font-weight: 500; }
.site-header nav a:hover, .site-header nav a[aria-current] { color: var(--brand); text-decoration: underline; }

/* page */
main { padding-top: 1rem; padding-bottom: 3rem; }
article { max-width: 46rem; }
.t-roundup article, .t-filters article, .t-brand article, .t-hub article, .t-home article { max-width: none; }
.t-roundup .prose, .t-filters .prose, .t-brand .prose, .t-hub .prose, .t-home .prose, .faq, .answer { max-width: 46rem; }
h1 { font-size: 1.85rem; line-height: 1.2; margin: .5rem 0; }
h2 { font-size: 1.4rem; line-height: 1.25; margin: 2rem 0 .5rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 .4rem; }
p, ul, ol { margin: 0 0 1rem; }
.byline { color: var(--muted); font-size: .9rem; margin: 0 0 1rem; }
.crumbs ol { list-style: none; padding: 0; margin: 0 0 .5rem; display: flex; flex-wrap: wrap; font-size: .875rem; color: var(--muted); }
.crumbs li + li::before { content: "/"; padding: 0 .4rem; }
.answer { background: var(--soft); border-left: 4px solid var(--brand); padding: .75rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 0 0 1.5rem; }
.answer p:last-child { margin-bottom: 0; }
.disclosure, .note, .method { font-size: .875rem; color: var(--muted); }
.disclosure { border: 1px solid var(--line); border-radius: var(--radius); padding: .5rem .75rem; }
.empty { color: var(--muted); font-style: italic; }
code { font-size: .9em; background: var(--soft); padding: .05em .3em; border-radius: 4px; }
blockquote { margin: 0 0 1rem; padding-left: 1rem; border-left: 3px solid var(--line); color: var(--muted); }

/* tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.25rem; border: 1px solid var(--line); border-radius: var(--radius);
  /* edge shadows show only on the side that still has content to scroll to (background-attachment trick) */
  background:
    linear-gradient(to right, #fff 30%, rgba(255,255,255,0)) left center / 2.5rem 100% no-repeat local,
    linear-gradient(to left, #fff 30%, rgba(255,255,255,0)) right center / 2.5rem 100% no-repeat local,
    radial-gradient(farthest-side at 0 50%, rgba(0,0,0,.28), rgba(0,0,0,0)) left center / .9rem 100% no-repeat scroll,
    radial-gradient(farthest-side at 100% 50%, rgba(0,0,0,.28), rgba(0,0,0,0)) right center / .9rem 100% no-repeat scroll; }
table { border-collapse: collapse; width: 100%; font-size: .9375rem; }
caption { caption-side: top; text-align: left; padding: .6rem .75rem; color: var(--muted); font-size: .875rem; }
th, td { padding: .55rem .75rem; text-align: left; vertical-align: top; border-top: 1px solid var(--line); }
thead th { background: var(--soft); font-size: .8125rem; text-transform: uppercase; letter-spacing: .02em; white-space: nowrap; }
tbody th { font-weight: 600; min-width: 10rem; }
.na { color: var(--muted); }
.specs td:last-child { white-space: nowrap; }
.prose table { border: 1px solid var(--line); margin-bottom: 1rem; }

/* Amazon text CTA: a plain underlined link. No price, no badge, no image. */
a.amz { color: var(--accent); font-weight: 600; }
a.amz:hover { color: #6a3900; }

/* cards & lists */
.cards { list-style: none; padding: 0; display: grid; gap: .75rem; grid-template-columns: 1fr; }
.cards li { border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem 1rem; }
.cards li a { font-weight: 600; }
.cards p { margin: .25rem 0 0; color: var(--muted); font-size: .9375rem; }
.model-card { border-top: 1px solid var(--line); padding-top: .25rem; }
.model-card .links, .issue .src { font-size: .9rem; color: var(--muted); }
.parts { padding-left: 1.1rem; margin: 0; }
.parts li { margin-bottom: .35rem; }
.tag { font-size: .75rem; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 .3rem; }
.brand-links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }

/* finder */
.finder-controls { display: grid; grid-template-columns: minmax(0, 1fr); gap: .75rem; margin: 0 0 1rem; }
.finder-controls[hidden] { display: none; }
.finder-controls label { display: grid; gap: .25rem; font-weight: 600; font-size: .9rem; }
.finder-controls input, .finder-controls select { font: inherit; padding: .5rem .6rem; border: 1px solid #7d8d92; border-radius: 6px; background: #fff; color: var(--ink); }
#finder-count { margin: 0; color: var(--muted); font-size: .875rem; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--soft); padding: 1.5rem 0; font-size: .9rem; color: var(--muted); }
.site-footer a { color: var(--ink); }
.site-footer p { margin: .75rem 0 0; }

@media (min-width: 48rem) {
  h1 { font-size: 2.25rem; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .finder-controls { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr); align-items: end; }
  #finder-count { grid-column: 1 / -1; }
}
@media (min-width: 64rem) { .cards { grid-template-columns: repeat(3, 1fr); } }
@media print { .site-header nav, .site-footer nav, .finder-controls { display: none; } }

/* own diagrams + charts */
figure.diagram, figure.chart { margin: 1.25rem 0; max-width: 46rem; }
figure.diagram img, figure.chart svg { display: block; width: 100%; height: auto; border-radius: var(--radius); }
figcaption { font-size: .875rem; color: var(--muted); margin-top: .35rem; }

/* tools (cost calculator, cleaning schedule): form is hidden until JS runs; result box reserves no layout until shown */
.tool-form[hidden], .tool-result[hidden] { display: none; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: .75rem; margin: 0 0 1rem; }
.tool-form label { display: grid; gap: .25rem; font-weight: 600; font-size: .9rem; }
.tool-form label.inline { display: flex; align-items: center; gap: .5rem; font-weight: 400; }
.tool-form input, .tool-form select, .tool-actions button { font: inherit; padding: .5rem .6rem; border: 1px solid #7d8d92; border-radius: 6px; background: #fff; color: var(--ink); max-width: 100%; }
.tool-form input[type=checkbox] { padding: 0; width: 1.1rem; height: 1.1rem; }
/* long <option> texts must not widen the form past the screen: grid items and controls may shrink */
.tool-form label, .finder-controls label, .tool-form fieldset, fieldset { min-width: 0; }
.tool-form input:not([type=checkbox]):not([type=radio]), .tool-form select,
.finder-controls input, .finder-controls select { width: 100%; min-width: 0; max-width: 100%; text-overflow: ellipsis; }
.tool-pump { border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 1rem; padding: .5rem 1rem 0; }
.tool-note { color: var(--muted); font-size: .9rem; min-height: 2.8em; }
.tool-result { border: 1px solid var(--line); border-radius: var(--radius); padding: .5rem 1rem 1rem; margin: 0 0 1.5rem; background: var(--soft); }
.tool-dl { display: grid; gap: .5rem; margin: 0 0 .75rem; }
.tool-dl div { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); padding-bottom: .35rem; }
.tool-dl dt { font-weight: 400; } .tool-dl dd { margin: 0; font-weight: 700; text-align: right; }
.tool-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.tool-actions button { cursor: pointer; font-weight: 600; }
@media (min-width: 640px) { .tool-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: end; } }
@media print { .tool-form, .tool-actions, .site-header, .site-footer nav { display: none !important; } .tool-result { border: 0; background: none; } }

/* brand + icons (explicit sizes everywhere -> no layout shift) */
.ic { flex: none; vertical-align: -.2em; }
.brand { gap: .55rem; line-height: 1.15; }
.brand-mark { width: 32px; height: 32px; flex: none; display: block; }
.brand-name { font-size: 1.05rem; letter-spacing: -.005em; }
.brand-name b { color: var(--brand); font-weight: 700; }
.brand:hover .brand-name b { color: var(--brand-dark); }
.brand:focus-visible, .site-header nav a:focus-visible, .cards a:focus-visible { border-radius: 4px; }
.site-header nav a { display: inline-flex; align-items: center; gap: .35rem; min-height: 2.25rem; }
.site-header nav a .ic { color: var(--brand); }
.site-header nav a[aria-current] { text-decoration-thickness: 2px; }
@media (max-width: 47.99rem) {
  .site-header .wrap { gap: .25rem 1rem; }
  .site-header nav ul { gap: 0 .85rem; }
  .site-header nav a { font-size: .9375rem; }
  .site-header nav a .ic { width: 16px; height: 16px; }
}
.cards li.has-ic { display: flex; gap: .85rem; align-items: flex-start; }
.card-ic { flex: none; width: 48px; height: 48px; display: grid; place-items: center; border-radius: 12px; background: var(--soft); color: var(--brand); }
.cards li.has-ic > div { min-width: 0; }
.disclosure .ic, .note .ic { margin-right: .4rem; color: var(--brand); vertical-align: -.25em; }
.sources .ic { color: var(--muted); vertical-align: -.1em; }
.foot-brand { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.foot-brand img { display: block; }

/* ---- v2 UX: table CTA under model name, merged source column, stacked cards on phones, scroll hint */
.scroll-hint { margin: 0 0 .35rem; font-size: .8125rem; color: var(--muted); text-align: right; }
.scroll-hint[hidden] { display: none; }
.specs tbody th { min-width: 11rem; }
.specs .cta { display: block; margin-top: .4rem; font-weight: 400; }
.cta a.amz { display: inline-block; background: var(--accent); color: #fff; padding: .3rem .7rem; border-radius: 6px; font-size: .875rem; font-weight: 600; text-decoration: none; white-space: nowrap; }
.cta a.amz:hover { background: #6a3900; color: #fff; }
.specs .src-cell { white-space: nowrap; }
.finder-empty { border: 1px dashed #7d8d92; border-radius: var(--radius); padding: .75rem 1rem; margin: 0 0 1.25rem; background: var(--soft); }
.finder-empty p { margin: 0 0 .5rem; }
.finder-empty p:last-child { margin: 0; }
@media (max-width: 47.99rem) {
  .stack-wrap { border: 0; overflow: visible; background: none; }
  .stack, .stack tbody, .stack tr, .stack th, .stack td, .stack caption { display: block; }
  .stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .stack caption { padding: 0 0 .5rem; }
  .stack tbody tr { display: grid; grid-template-columns: 1fr 1fr; gap: .1rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); padding: .6rem .75rem .5rem; margin: 0 0 .75rem; }
  .stack tbody th { grid-column: 1 / -1; border: 0; padding: 0 0 .4rem; min-width: 0; font-size: 1.05rem; }
  .stack td { border: 0; padding: .2rem 0; min-width: 0; white-space: normal !important; overflow-wrap: anywhere; }
  .stack td::before { content: attr(data-label); display: block; font-size: .75rem; text-transform: uppercase; letter-spacing: .02em; color: var(--muted); }
  .stack td.src-cell, .finder-table td { grid-column: 1 / -1; }
  .stack .cta { margin-top: .5rem; }
  .stack .cta a.amz { display: block; text-align: center; padding: .6rem .75rem; font-size: .9375rem; }
}

/* ---- v2 UX: single-row scrollable nav on phones (no hamburger) */
@media (max-width: 47.99rem) {
  .site-header .wrap { padding-top: .5rem; padding-bottom: .15rem; gap: .1rem 1rem; }
  .site-header nav { flex: 1 1 100%; min-width: 0; overflow-x: auto; overflow-y: hidden; scrollbar-width: none; overscroll-behavior-x: contain;
    --fl: 0px; --fr: 1.75rem;
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 var(--fl), #000 calc(100% - var(--fr)), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0, #000 var(--fl), #000 calc(100% - var(--fr)), transparent 100%); }
  .site-header nav::-webkit-scrollbar { display: none; }
  .site-header nav ul { flex-wrap: nowrap; width: max-content; padding: 0 1.75rem 0 0; gap: 0 1rem; }
  .site-header nav li { flex: none; }
  .site-header nav a { white-space: nowrap; min-height: 2.5rem; }
  .site-header nav a:focus-visible { outline-offset: -3px; }
}

/* ---- v2 UX: "At a glance" boxes */
.glance { border: 1px solid var(--line); border-left: 4px solid var(--brand); background: var(--soft); border-radius: var(--radius); padding: .75rem 1rem; margin: 0 0 1.5rem; }
.glance h2 { margin: 0 0 .5rem; font-size: 1.15rem; }
.glance h3 { margin: 0 0 .4rem; font-size: 1.05rem; }
.glance-dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: .5rem 1rem; margin: 0 0 .75rem; }
.glance-dl dt { font-size: .75rem; text-transform: uppercase; letter-spacing: .02em; color: var(--muted); }
.glance-dl dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.glance-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.25rem; margin: 0; }
.glance .cta { display: block; margin: 0; }
.glance .cta a.amz { font-size: 1rem; padding: .5rem 1rem; }
.glance-sides { display: grid; gap: .75rem; grid-template-columns: 1fr; margin: 0 0 .75rem; }
.glance-side { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: .6rem .85rem; }
.glance-side .glance-dl { grid-template-columns: 1fr 1fr; }
.glance-buy { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.glance-buy li { display: grid; gap: .2rem; }
.gb-name { font-size: .9rem; }
@media (max-width: 47.99rem) {
  .glance-actions .cta { flex: 1 1 100%; }
  .glance .cta a.amz { display: block; text-align: center; }
}
@media (min-width: 48rem) { .glance-sides { grid-template-columns: 1fr 1fr; } }

/* ---- v2 UX: "On this page" (collapsible on phones, sticky right rail >= 72rem) */
.toc-rail { display: none; }
.toc-m { border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 1.25rem; background: #fff; }
.toc-m summary { cursor: pointer; padding: .55rem .85rem; font-weight: 600; min-height: 2.5rem; }
.toc-m nav { padding: 0 .85rem .6rem; }
.toc ol, .toc-rail ol { margin: 0; padding-left: 1.2rem; }
.toc li, .toc-rail li { margin: .15rem 0; }
.toc-title { margin: 0 0 .4rem; font-weight: 700; font-size: .9rem; }
html { scroll-padding-top: 1rem; }
@media (min-width: 72rem) {
  .toc-m { display: none; }
  article, .prose.has-rail { position: relative; }
  .toc-rail { display: block; position: absolute; top: 0; bottom: 0; left: calc(100% + 2rem); width: 14rem; }
  .toc-sticky { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow-y: auto; font-size: .875rem; border-left: 2px solid var(--line); padding-left: .85rem; }
  .toc-sticky ol { list-style: none; padding: 0; }
  .toc-sticky a { display: block; padding: .15rem 0; color: var(--ink); text-decoration: none; }
  .toc-sticky a:hover { text-decoration: underline; }
  .toc-sticky a[aria-current="true"] { color: var(--brand); font-weight: 700; }
}
@media print { .toc, .toc-rail, .scroll-hint { display: none !important; } }