:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f7f7f5;
  --color-bg-alt: #f2f2ef;
  --color-ink: #14171a;
  --color-ink-soft: #3b4148;
  --color-muted: #6b7177;
  --color-border: #e4e4e0;
  --color-accent: #d64a2a;
  --color-accent-dark: #b23a1d;
  --color-link: #1f4fb7;
  --color-info: #eef3fb;
  --color-warn: #fff4e3;
  --color-note: #eef7ef;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --max-w: 100%;
  --max-w-wide: 1040px;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 1px rgba(0,0,0,.02);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--color-link); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--color-accent-dark); }

h1, h2, h3, h4 { line-height: 1.25; color: var(--color-ink); margin: 0 0 .5em; font-weight: 650; letter-spacing: -.01em; }
h1 { font-size: clamp(1.75rem, 3vw + .5rem, 2.5rem); margin-top: .2em; }
h2 { font-size: clamp(1.35rem, 1.5vw + .6rem, 1.7rem); margin-top: 1.8em; }
h3 { font-size: 1.15rem; margin-top: 1.6em; }
p { margin: 0 0 1em; }

ul, ol { padding-left: 1.25em; margin: 0 0 1em; }
li { margin-bottom: .35em; }

hr { border: 0; border-top: 1px solid var(--color-border); margin: 2rem 0; }

.container { max-width: var(--max-w-wide); margin: 0 auto; padding: 0 20px; }
.prose { max-width: none; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 14px 20px;
  max-width: var(--max-w-wide);
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-weight: 700;
  color: var(--color-ink);
  text-decoration: none;
  font-size: 1.02rem;
  letter-spacing: -.01em;
}
.brand__mark {
  display: inline-block;
  width: 22px; height: 22px;
  border-radius: 5px;
  background: var(--color-ink);
  position: relative;
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 2px;
  background: var(--color-accent);
}
.brand__tag {
  font-size: .78rem;
  color: var(--color-muted);
  font-weight: 500;
  margin-left: .2rem;
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
}
.nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--color-accent-dark); }
.nav a.nav__cta {
  background: var(--color-ink);
  color: #fff;
  padding: .5rem .85rem;
  border-radius: var(--radius);
  font-weight: 600;
}
.nav a.nav__cta:hover { background: var(--color-accent-dark); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: .45rem .6rem;
  cursor: pointer;
  color: var(--color-ink);
  font: inherit;
}

@media (max-width: 800px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--color-border);
  }
  .nav.is-open { display: flex; }
  .nav a {
    padding: .75rem 20px;
    border-bottom: 1px solid var(--color-border);
  }
  .nav a.nav__cta {
    margin: 10px 20px 4px;
    text-align: center;
    border-bottom: 0;
  }
  .site-header__inner { flex-wrap: wrap; padding: 12px 20px; }
}

/* Hero */
.hero {
  padding: 52px 0 32px;
  background: linear-gradient(180deg, #fafaf7 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}
.hero h1 { max-width: 22ch; }
.hero__lead {
  max-width: 60ch;
  font-size: 1.1rem;
  color: var(--color-ink-soft);
}
.hero__meta {
  display: inline-block;
  font-size: .85rem;
  color: var(--color-muted);
  margin-bottom: .6rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* Page header (non-hero pages) */
.page-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}
.page-header h1 { max-width: 26ch; }
.page-header__lead { color: var(--color-ink-soft); max-width: 62ch; font-size: 1.05rem; }
.breadcrumbs {
  font-size: .88rem;
  color: var(--color-muted);
  margin-bottom: .8rem;
}
.breadcrumbs a { color: var(--color-muted); }
.breadcrumbs a:hover { color: var(--color-accent-dark); }
.breadcrumbs span[aria-current="page"] { color: var(--color-ink-soft); }

/* Main */
main { padding: 36px 0 64px; }
article.prose > h2:first-of-type { margin-top: 0; }

/* Utility boxes */
.box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 1.5rem 0;
  background: var(--color-bg-soft);
}
.box > :first-child { margin-top: 0; }
.box > :last-child { margin-bottom: 0; }
.box--info { background: var(--color-info); border-color: #d8e2f2; }
.box--note { background: var(--color-note); border-color: #d6e8d9; }
.box--warn { background: var(--color-warn); border-color: #f2dcb4; }
.box__label {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-ink-soft);
  margin-bottom: .4rem;
}

/* CTA */
.cta-block {
  margin: 2rem 0;
  padding: 22px 22px 20px;
  border-radius: var(--radius);
  background: var(--color-ink);
  color: #fff;
  display: grid;
  gap: .7rem;
}
.cta-block h3 { color: #fff; margin: 0; }
.cta-block p { margin: 0; color: #dcdfe3; }
.cta {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  padding: .75rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  justify-self: start;
}
.cta:hover { background: var(--color-accent-dark); color: #fff; }
.cta--ghost {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
}
.cta--ghost:hover { background: var(--color-ink); color: #fff; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: .96rem;
  background: #fff;
}
table.data th, table.data td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
table.data thead th {
  background: var(--color-bg-alt);
  font-weight: 700;
}
table.data tbody tr:nth-child(even) td { background: #fcfcfb; }

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 1.5rem 0;
}
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  text-decoration: none;
  color: var(--color-ink);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: #d2d2cc;
  color: var(--color-ink);
}
.card__eyebrow {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-muted);
  font-weight: 600;
}
.card__title {
  font-size: 1.05rem;
  font-weight: 650;
  margin: 0;
  line-height: 1.3;
}
.card__desc {
  font-size: .93rem;
  color: var(--color-ink-soft);
  margin: 0;
}

/* Three-path boxes on homepage */
.paths {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 1.5rem 0 2rem;
}
@media (max-width: 640px) {
  .paths { grid-template-columns: 1fr; }
}
.path {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.path__num {
  font-size: .8rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.path h3 { margin: 0; font-size: 1.1rem; }
.path p { margin: 0; color: var(--color-ink-soft); font-size: .95rem; }
.path a { margin-top: auto; font-weight: 600; text-decoration: none; }
.path a:hover { text-decoration: underline; }

/* Decision chooser (4 cards by household type) */
.chooser {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 1.5rem 0 2rem;
}
@media (max-width: 900px) {
  .chooser { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .chooser { grid-template-columns: 1fr; }
}
.chooser__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.chooser__item:hover {
  border-color: #d2d2cc;
  box-shadow: var(--shadow-sm);
  color: var(--color-ink);
}
.chooser__label {
  font-weight: 650;
  font-size: 1rem;
  line-height: 1.25;
}
.chooser__desc {
  font-size: .9rem;
  color: var(--color-ink-soft);
  margin: 0;
}
.chooser__cta {
  margin-top: auto;
  font-size: .88rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* Checklist blocks */
.checklist-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: #fff;
  margin: 1.2rem 0;
}
.checklist-block h3 { margin-top: 0; }
.checklist-block .why {
  font-size: .92rem;
  color: var(--color-muted);
  margin: -.2rem 0 .8rem;
}
.checklist-block ul { padding-left: 1.15em; }

/* Quick-pick (two-column decision module) */
.quick-pick {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  margin: 1.2rem 0 1.8rem;
  overflow: hidden;
}
.quick-pick__row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  padding: 14px 18px;
  border-top: 1px solid var(--color-border);
}
.quick-pick__row:first-child { border-top: 0; }
.quick-pick__label {
  font-weight: 650;
  color: var(--color-ink);
}
.quick-pick__value {
  color: var(--color-ink-soft);
  font-size: .96rem;
}
@media (max-width: 640px) {
  .quick-pick__row { grid-template-columns: 1fr; gap: 4px; }
}

/* Dual-module (two-column comparison, e.g. DIY vs hotový kit) */
.dual-module {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 1.2rem 0 1.8rem;
}
@media (max-width: 720px) {
  .dual-module { grid-template-columns: 1fr; }
}
.dual-module__col {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: #fff;
}
.dual-module__title {
  margin: 0 0 .15rem;
  font-size: 1.1rem;
}
.dual-module__sub {
  margin: 0 0 .6rem;
  font-size: .88rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 600;
}
.dual-module__col ul { margin: 0; padding-left: 1.1em; }
.dual-module__col li { font-size: .95rem; color: var(--color-ink-soft); }

/* Inline note + utility note */
.note-inline {
  font-size: .92rem;
  color: var(--color-muted);
  border-left: 3px solid var(--color-border);
  padding: .2rem 0 .2rem .8rem;
  margin: .6rem 0 1.4rem;
}
.utility-note {
  margin-top: 2rem;
  color: var(--color-muted);
}

/* FAQ accordion */
.faq-item {
  border-top: 1px solid var(--color-border);
}
.faq-item:last-child { border-bottom: 1px solid var(--color-border); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 28px 16px 0;
  font-weight: 600;
  position: relative;
  color: var(--color-ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--color-muted);
  transition: transform .2s ease;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body {
  padding: 0 0 16px;
  color: var(--color-ink-soft);
}
.faq-item .faq-body :last-child { margin-bottom: 0; }

/* Sources / bibliography */
.sources {
  font-size: .94rem;
  color: var(--color-ink-soft);
}
.sources ol { padding-left: 1.3em; }
.sources li { margin-bottom: .6rem; }
.sources a { word-break: break-word; }

.citations {
  font-size: .95rem;
  color: var(--color-ink-soft);
  margin: 1rem 0 1.5rem;
  padding-left: 14px;
  border-left: 3px solid var(--color-border);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  padding: 32px 0 36px;
  font-size: .93rem;
  color: var(--color-muted);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 24px;
}
.site-footer__grid > div h4 {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-ink);
  margin: 0 0 .6rem;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .3rem; }
.site-footer a { color: var(--color-ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--color-accent-dark); text-decoration: underline; }
.site-footer__meta {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: .85rem;
}

@media (max-width: 700px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

/* Mobile sticky CTA */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--color-border);
  display: none;
  z-index: 40;
}
.sticky-cta .cta {
  display: block;
  width: 100%;
  text-align: center;
  padding: .85rem 1rem;
}
@media (max-width: 720px) {
  .sticky-cta { display: block; }
  body { padding-bottom: 72px; }
}

/* Small helpers */
.eyebrow {
  display: inline-block;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-muted);
  font-weight: 600;
  margin-bottom: .4rem;
}
.muted { color: var(--color-muted); }
.tag {
  display: inline-block;
  font-size: .78rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-ink-soft);
}
.updated {
  font-size: .88rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

/* Related links block */
.related {
  margin: 2rem 0;
  padding: 20px;
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.related h3 { margin-top: 0; }
.related ul { margin-bottom: 0; }

/* Project attribution */
.project-note {
  font-size: .8rem;
  color: var(--color-muted);
  border-left: 2px solid var(--color-border);
  padding-left: 10px;
  margin: 0;
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* Figures for infographics */
figure { margin: 0; }
.fig {
  margin: 1.6rem 0 2rem;
  margin-inline: 0;
  padding: 0;
}
.fig__image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.fig__caption {
  display: block;
  margin-top: .5rem;
  font-size: .9rem;
  color: var(--color-muted);
}
.fig--hero {
  margin: 1rem 0 2.2rem;
  margin-inline: 0;
}

/* Category icons (checklist, FAQ) */
.cat-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  max-width: 1em;
  margin-right: .4em;
  vertical-align: -.12em;
  color: var(--color-accent);
  fill: none;
  stroke: currentColor;
  flex-shrink: 0;
}
.faq-group-head {
  display: flex;
  align-items: center;
  gap: .2em;
}

/* Cookie consent */
.consent {
  position: fixed;
  right: 20px;
  bottom: 20px;
  left: auto;
  z-index: 1000;
  width: min(380px, calc(100vw - 40px));
  background: var(--color-bg);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: 0 20px 40px -12px rgba(20,23,26,.22), 0 4px 12px rgba(20,23,26,.06);
  padding: 20px 22px 18px;
  font-size: .94rem;
  line-height: 1.55;
  animation: consentIn .25s ease-out;
}
@keyframes consentIn {
  from { transform: translateY(10px); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.consent__title {
  margin: 0 0 .35em;
  font-size: 1rem;
  font-weight: 650;
  color: var(--color-ink);
  letter-spacing: -.005em;
}
.consent__text {
  margin: 0 0 1em;
  color: var(--color-ink-soft);
  font-size: .92rem;
}
.consent__text a {
  color: var(--color-ink-soft);
  text-decoration: underline;
}
.consent__text a:hover { color: var(--color-accent-dark); }
.consent__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.consent__btn {
  font: inherit;
  padding: .55em 1.1em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
  line-height: 1.2;
  transition: background .15s, color .15s, border-color .15s;
}
.consent__btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.consent__btn--primary:hover { background: var(--color-accent-dark); }
.consent__btn--ghost {
  background: transparent;
  color: var(--color-ink-soft);
  border-color: var(--color-border);
}
.consent__btn--ghost:hover {
  color: var(--color-ink);
  border-color: var(--color-ink-soft);
}
@media (max-width: 560px) {
  .consent {
    right: 12px;
    left: 12px;
    bottom: 12px;
    width: auto;
    padding: 16px 18px 14px;
  }
  .consent__btn { flex: 1 1 auto; }
}
.consent-link {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  text-decoration: underline;
  cursor: pointer;
  font: inherit;
}
.consent-link:hover { color: var(--color-accent-dark); }

/* Print */
@media print {
  .site-header, .site-footer, .sticky-cta, .cta-block, .consent { display: none; }
  a { color: #000; }
  .fig__image { break-inside: avoid; }
}