/* SPDX-License-Identifier: EUPL-1.2 */
/* Aetheus documentation site.
   Tokens, header, buttons and footer are kept identical to the vitrine (site/assets/css/style.css)
   so both properties read as one product; everything below "Documentation layout" is specific to
   long-form documentation pages. */

/* ------------------------------------------------------------------ */
/* Design tokens (shared with the vitrine)                             */
/* ------------------------------------------------------------------ */
:root {
  --color-brand:        #1D4ED8;
  --color-brand-strong: #1E40AF;
  --color-brand-soft:   #3B82F6;
  --btn-bg:             #1D4ED8;
  --btn-bg-hover:       #1E40AF;
  --color-accent-light: #60A5FA;
  --color-accent-pale:  #93C5FD;

  --color-success: #16A34A;
  --color-danger:  #DC2626;
  --color-warning: #B45309;

  --color-bg:         #FFFFFF;
  --color-surface:    #F4F5F7;
  --color-surface-2:  #ECEEF2;
  --color-border:     #E2E4E9;
  --color-text:       #1A1D23;
  --color-text-muted: #5B616E;
  --color-heading:    #0B0D10;
  --color-on-brand:   #FFFFFF;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;

  --step--1: clamp(0.83rem, 0.79rem + 0.18vw, 0.94rem);
  --step-0:  clamp(1rem, 0.95rem + 0.25vw, 1.05rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.5vw, 1.4rem);
  --step-2:  clamp(1.5rem, 1.3rem + 1vw, 1.9rem);
  --step-3:  clamp(1.95rem, 1.6rem + 1.7vw, 2.6rem);

  --space-2xs: 0.375rem;
  --space-xs:  0.625rem;
  --space-s:   1rem;
  --space-m:   1.625rem;
  --space-l:   2.625rem;
  --space-xl:  4.25rem;

  --radius:    0.75rem;
  --radius-sm: 0.5rem;
  --shadow:    0 1px 2px rgba(11, 13, 16, 0.06), 0 8px 24px rgba(11, 13, 16, 0.06);
  --shadow-hover: 0 2px 4px rgba(11, 13, 16, 0.08), 0 16px 40px rgba(11, 13, 16, 0.10);
  --content-width: 82rem;
  --header-h: 4rem;

  --code-bg: #F7F8FA;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg:         #0D0F12;
    --color-surface:    #16191E;
    --color-surface-2:  #1C2027;
    --color-border:     #262A31;
    --color-text:       #E6E8EC;
    --color-text-muted: #9AA0AB;
    --color-heading:    #F5F6F8;

    --color-brand:      #3B82F6;
    --color-brand-strong: #60A5FA;
    --btn-bg:           #2563EB;
    --btn-bg-hover:     #1D4ED8;
    --color-success:    #22C55E;
    --color-danger:     #EF4444;
    --color-warning:    #F59E0B;

    --code-bg:      #12151A;
    --shadow:       0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.5), 0 16px 40px rgba(0, 0, 0, 0.55);
  }
}
:root[data-theme="dark"] {
  --color-bg:         #0D0F12;
  --color-surface:    #16191E;
  --color-surface-2:  #1C2027;
  --color-border:     #262A31;
  --color-text:       #E6E8EC;
  --color-text-muted: #9AA0AB;
  --color-heading:    #F5F6F8;

  --color-brand:      #3B82F6;
  --color-brand-strong: #60A5FA;
  --btn-bg:           #2563EB;
  --btn-bg-hover:     #1D4ED8;
  --color-success:    #22C55E;
  --color-danger:     #EF4444;
  --color-warning:    #F59E0B;

  --code-bg:      #12151A;
  --shadow:       0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.5), 0 16px 40px rgba(0, 0, 0, 0.55);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-s);
  text-wrap: balance;
}

p { margin: 0 0 var(--space-s); }
a { color: var(--color-brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

:focus-visible {
  outline: 3px solid var(--color-brand-soft);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: var(--space-s);
  top: -4rem;
  z-index: 100;
  padding: var(--space-2xs) var(--space-s);
  background: var(--color-brand);
  color: var(--color-on-brand);
  border-radius: var(--radius-sm);
  transition: top 0.15s ease;
}
.skip-link:focus { top: var(--space-s); }

.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--space-s);
}

/* ------------------------------------------------------------------ */
/* Header (shared with the vitrine)                                    */
/* ------------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-s);
  max-width: var(--content-width);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-weight: 700;
  color: var(--color-heading);
  font-size: var(--step-1);
  letter-spacing: -0.02em;
  margin-right: auto;
}
.brand:hover { text-decoration: none; }
.brand img { width: 1.85rem; height: 1.85rem; }
.brand b { color: var(--color-brand); font-weight: 700; }

.nav-links { display: none; align-items: center; gap: var(--space-m); }
.nav-links a {
  color: var(--color-text-muted);
  font-size: var(--step--1);
  font-weight: 500;
  position: relative;
  padding-block: 0.35rem;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--color-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.18s ease;
}
.nav-links a:hover { color: var(--color-heading); text-decoration: none; }
.nav-links a:hover::after { transform: scaleX(1); }

.header-actions {
  --header-control-size: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--header-control-size);
  height: var(--header-control-size);
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-heading);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--color-brand); color: var(--color-brand); }
.theme-toggle svg { width: 1.25rem; height: 1.25rem; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.lang-switch {
  display: inline-flex;
  height: var(--header-control-size);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: var(--step--1);
}
.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: calc(var(--header-control-size) - 2px);
  height: 100%;
  padding-inline: 0.6rem;
  color: var(--color-text-muted);
  font-weight: 600;
}
.lang-switch a:hover { text-decoration: none; }
.lang-switch a[aria-current="true"] { background: var(--color-brand); color: var(--color-on-brand); }

.menu-mobile { position: relative; display: inline-flex; }
.menu-mobile > summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--header-control-size);
  height: var(--header-control-size);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-heading);
}
.menu-mobile > summary::-webkit-details-marker { display: none; }
.menu-mobile > summary svg { width: 1.35rem; height: 1.35rem; }
.menu-mobile-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.6rem);
  min-width: 12rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.4rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hover);
  z-index: 60;
}
.menu-mobile-panel a {
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: 500;
}
.menu-mobile-panel a:hover { background: var(--color-surface-2); color: var(--color-brand); text-decoration: none; }

@media (min-width: 60rem) {
  .nav-links { display: inline-flex; }
  .menu-mobile { display: none; }
}

/* ------------------------------------------------------------------ */
/* Buttons (shared with the vitrine)                                   */
/* ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  font-size: var(--step-0);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--btn-bg); color: var(--color-on-brand); }
.btn-primary:hover { background: var(--btn-bg-hover); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--color-heading); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-brand); color: var(--color-brand); transform: translateY(-2px); }
.header-actions > .btn { height: var(--header-control-size); padding-inline: 1rem; font-size: var(--step--1); }

/* ------------------------------------------------------------------ */
/* Documentation layout                                                */
/* ------------------------------------------------------------------ */
.doc-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-m);
  align-items: start;
  padding-block: var(--space-m) var(--space-xl);
}

.doc-main { min-width: 0; }
.doc-article { min-width: 0; }
.doc-article h1 { font-size: var(--step-3); margin-bottom: var(--space-s); }
.doc-article > p:first-of-type { color: var(--color-text-muted); font-size: var(--step-1); }
.doc-article h2 {
  font-size: var(--step-2);
  margin-top: var(--space-l);
  padding-top: var(--space-s);
  border-top: 1px solid var(--color-border);
}
.doc-article h3 { font-size: var(--step-1); margin-top: var(--space-m); }
.doc-article h4 { font-size: var(--step-0); margin-top: var(--space-s); color: var(--color-text); }
.doc-article ul, .doc-article ol { margin: 0 0 var(--space-s); padding-left: 1.35rem; }
.doc-article li { margin-bottom: 0.35rem; }
.doc-article li > ul, .doc-article li > ol { margin-top: 0.35rem; }

/* Sidebar */
.doc-sidebar { min-width: 0; }
.doc-nav-mobile > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  padding: 0.7rem var(--space-s);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-heading);
  font-weight: 600;
  font-size: var(--step--1);
}
.doc-nav-mobile > summary::-webkit-details-marker { display: none; }
.doc-nav-mobile > summary::after { content: "▾"; color: var(--color-text-muted); }
.doc-nav-mobile[open] > summary::after { content: "▴"; }
.doc-nav { padding-block: var(--space-s); }
.doc-nav-list { list-style: none; margin: 0; padding: 0; }
.doc-nav-group + .doc-nav-group { margin-top: var(--space-m); }
.doc-nav-group > ul { list-style: none; margin: 0; padding: 0; }
.doc-nav-title {
  margin: 0 0 var(--space-2xs);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.doc-nav-group a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem var(--space-xs);
  border-left: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--step--1);
  font-weight: 600;
}
.doc-nav-group a:hover { color: var(--color-heading); border-color: var(--color-brand); text-decoration: none; }
.doc-nav-group a[aria-current="page"] {
  color: var(--color-heading);
  border-color: var(--color-brand);
  background: linear-gradient(90deg, color-mix(in srgb, var(--color-brand) 12%, transparent), transparent);
}

/* Table of contents */
.doc-toc { display: none; min-width: 0; }
.doc-toc-title {
  margin: 0 0 var(--space-xs);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.doc-toc ul { list-style: none; margin: 0; padding: 0; }
.doc-toc a {
  display: block;
  padding: 0.3rem 0 0.3rem var(--space-xs);
  border-left: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--step--1);
  line-height: 1.4;
}
.doc-toc a:hover { color: var(--color-heading); border-color: var(--color-brand); text-decoration: none; }
.doc-toc a[aria-current="true"] { color: var(--color-brand); border-color: var(--color-brand); }

/* Pager */
.doc-pager {
  display: flex;
  gap: var(--space-s);
  justify-content: space-between;
  margin-top: var(--space-l);
  padding-top: var(--space-m);
  border-top: 1px solid var(--color-border);
}
.doc-pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  max-width: 48%;
  padding: 0.75rem var(--space-s);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-heading);
}
.doc-pager-link:hover { border-color: var(--color-brand); text-decoration: none; }
.doc-pager-link span { color: var(--color-text-muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; }
.doc-pager-next { text-align: right; margin-left: auto; }

/* ------------------------------------------------------------------ */
/* Long-form content pieces                                            */
/* ------------------------------------------------------------------ */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-surface-2);
  border-radius: 0.3rem;
  padding: 0.12em 0.35em;
}

pre {
  position: relative;
  margin: 0 0 var(--space-s);
  padding: var(--space-s);
  background: var(--code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  line-height: 1.55;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.83rem;
  color: var(--color-text);
  white-space: pre;
}

.code-copy {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  padding: 0.25rem 0.55rem;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.35rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
pre:hover .code-copy, .code-copy:focus-visible { opacity: 1; }
.code-copy:hover { color: var(--color-brand); border-color: var(--color-brand); }
.code-copy[data-copied="true"] { color: var(--color-success); border-color: var(--color-success); opacity: 1; }

.doc-article table {
  width: 100%;
  margin: 0 0 var(--space-s);
  border-collapse: collapse;
  font-size: var(--step--1);
}
.doc-article th, .doc-article td {
  padding: 0.55rem var(--space-xs);
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}
.doc-article th { background: var(--color-surface); color: var(--color-heading); font-weight: 700; }
.table-scroll { overflow-x: auto; overscroll-behavior-inline: contain; margin-bottom: var(--space-s); }
.table-scroll table { margin-bottom: 0; }

.callout {
  margin: 0 0 var(--space-s);
  padding: var(--space-s);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-brand);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}
.callout > :last-child { margin-bottom: 0; }
.callout-title { font-weight: 700; color: var(--color-heading); margin-bottom: var(--space-2xs); }
.callout-warning { border-left-color: var(--color-warning); }
.callout-danger { border-left-color: var(--color-danger); }
.callout-untested { border-left-color: var(--color-warning); }
.callout-untested .callout-title { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.badge-untested {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--color-warning);
  border-radius: 2rem;
  background: color-mix(in srgb, var(--color-warning) 14%, transparent);
  color: var(--color-warning);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  white-space: nowrap;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: var(--space-xs);
}
.eyebrow::before { content: ""; width: 1.375rem; height: 0.125rem; background: currentColor; }

/* Card grids, used on the home and the install index */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-s);
  margin-bottom: var(--space-m);
}
.card {
  display: flex;
  flex-direction: column;
  padding: var(--space-m);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
a.card { color: inherit; }
a.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--color-brand); text-decoration: none; }
.card h3 { font-size: var(--step-1); margin-top: 0; }
.card p { color: var(--color-text-muted); margin-bottom: 0; }
.card-more { margin-top: auto; padding-top: var(--space-s); color: var(--color-brand); font-size: var(--step--1); font-weight: 700; }
@media (min-width: 46rem) { .card-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 70rem) { .card-grid-3 { grid-template-columns: repeat(3, 1fr); } }

.doc-hero { padding-block: var(--space-m) var(--space-s); }
.doc-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); letter-spacing: -0.04em; }
.doc-hero .doc-hero-sub { color: var(--color-text-muted); font-size: var(--step-1); max-width: 44rem; }
.doc-hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-m); }

.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li {
  counter-increment: step;
  position: relative;
  margin-bottom: var(--space-m);
  padding-left: 2.6rem;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 1.85rem;
  height: 1.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-on-brand);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
}

/* ------------------------------------------------------------------ */
/* Footer (shared with the vitrine)                                    */
/* ------------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-l);
  background: var(--color-bg);
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-s) var(--space-l);
  align-items: center;
  justify-content: space-between;
}
.footer-brand { display: inline-flex; align-items: center; gap: var(--space-2xs); font-weight: 600; color: var(--color-heading); }
.footer-brand img { width: 1.4rem; height: 1.4rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-m); }
.footer-links a { color: var(--color-text-muted); font-size: var(--step--1); }
.footer-links a:hover { color: var(--color-brand); }
.footer-legal { font-size: var(--step--1); color: var(--color-text-muted); width: 100%; margin: 0; }

/* ------------------------------------------------------------------ */
/* Wide viewports: sidebar + content + table of contents               */
/* ------------------------------------------------------------------ */
@media (min-width: 64rem) {
  .doc-layout { grid-template-columns: 15rem minmax(0, 1fr); gap: var(--space-l); }
  .doc-layout:has(.doc-toc) { grid-template-columns: 15rem minmax(0, 1fr) 14rem; }
  .doc-layout-home { grid-template-columns: minmax(0, 1fr); }

  .doc-sidebar, .doc-toc {
    position: sticky;
    top: calc(var(--header-h) + var(--space-s));
    max-height: calc(100vh - var(--header-h) - var(--space-m));
    overflow-y: auto;
  }
  .doc-toc { display: block; }

  /* The sidebar is a permanent rail on wide screens: the disclosure wrapper stops being a
     disclosure and always shows its content. */
  .doc-nav-mobile > summary { display: none; }
  .doc-nav { padding-top: 0; }
}

@media (max-width: 63.99rem) {
  /* Phones and tablets: the sidebar collapses behind its summary so the page starts on content. */
  .doc-nav-mobile:not([open]) .doc-nav { display: none; }
}

@media (max-width: 38.75rem) {
  .brand span { font-size: var(--step-0); }
  .header-actions { gap: 0.3125rem; }
  .header-actions > .btn { width: var(--header-control-size); padding: 0; font-size: 0; }
  .header-actions > .btn::before { content: "↗"; font-size: 1rem; }
  .lang-switch a { min-width: 2.125rem; padding-inline: 0.35rem; }
  .doc-pager { flex-direction: column; }
  .doc-pager-link { max-width: none; }
  .doc-pager-next { text-align: left; margin-left: 0; }
  .code-copy { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card, .nav-links a::after { transition: none; }
  .btn:hover, a.card:hover { transform: none; }
}