/* Alternativní zdroje energie – main screen stylesheet */
:root {
  --az-bg: #eef5f1;
  --az-bg-accent: #d9ebe3;
  --az-surface: #ffffff;
  --az-ink: #1c2b26;
  --az-muted: #4d635b;
  --az-brand: #145c4f;
  --az-brand-dark: #0d3f36;
  --az-accent: #2a8f78;
  --az-accent-soft: #c8e6dc;
  --az-line: #c5d8cf;
  --az-focus: #c45c26;
  --az-radius: 10px;
  --az-shadow: 0 10px 30px rgba(20, 50, 40, 0.08);
  --az-font: "Figtree", "Segoe UI", sans-serif;
  --az-display: "Source Serif 4", Georgia, serif;
  --az-max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--az-ink);
  font: 400 1.05rem/1.65 var(--az-font);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, var(--az-bg-accent), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, #d7e8ef, transparent 50%),
    linear-gradient(180deg, #f5faf7 0%, var(--az-bg) 40%, #e7f0eb 100%);
  min-height: 100vh;
  overflow-wrap: break-word;
}

a {
  color: var(--az-brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.15s ease, background-color 0.15s ease;
}

a:hover {
  color: var(--az-accent);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--az-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.6rem 1rem;
  background: var(--az-brand-dark);
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

#page {
  width: min(100% - 2rem, var(--az-max));
  margin: 0 auto;
  padding: 1.25rem 0 2.5rem;
}

#header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1.1rem 1.35rem;
  background: linear-gradient(135deg, var(--az-brand-dark), var(--az-brand) 55%, #1e7a68);
  color: #f4fffb;
  border-radius: calc(var(--az-radius) + 4px);
  box-shadow: var(--az-shadow);
}

.site-brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  text-decoration: none;
  color: inherit;
  max-width: 28rem;
}

.site-brand:hover {
  color: #fff;
}

.site-brand__name {
  font-family: var(--az-display);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.site-brand__tag {
  font-size: 0.92rem;
  opacity: 0.88;
  line-height: 1.35;
}

.dr-navigation {
  background: var(--az-surface);
  border: 1px solid var(--az-line);
  border-radius: var(--az-radius);
  padding: 0.55rem 0.75rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--az-shadow);
}

.dr-navigation .dr-menu {
  gap: 0.15rem;
}

.dr-navigation .dr-menu > li > a {
  color: var(--az-ink) !important;
  font-size: 0.95rem;
  font-weight: 600;
  min-height: 40px;
  padding: 0.55rem 0.75rem !important;
  border-radius: 8px;
}

.dr-navigation .dr-menu > li > a:hover,
.dr-navigation .dr-menu > li > a[aria-current="page"] {
  background: var(--az-accent-soft) !important;
  color: var(--az-brand-dark) !important;
}

.dr-mobile-toggle {
  font-family: var(--az-font) !important;
  border-color: var(--az-line) !important;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 260px);
  gap: 1.25rem;
  align-items: start;
}

#main {
  background: var(--az-surface);
  border: 1px solid var(--az-line);
  border-radius: var(--az-radius);
  padding: 1.5rem 1.6rem 2rem;
  box-shadow: var(--az-shadow);
  min-width: 0;
}

#main h1 {
  margin: 0 0 1.1rem;
  font-family: var(--az-display);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--az-brand-dark);
}

#main h2 {
  margin: 1.75rem 0 0.7rem;
  font-family: var(--az-display);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--az-brand);
}

#main h3 {
  margin: 1.35rem 0 0.5rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--az-ink);
}

#main p {
  margin: 0 0 1rem;
  text-align: left;
  color: var(--az-ink);
}

#main ul {
  margin: 0 0 1.1rem;
  padding-left: 1.25rem;
}

#main li {
  margin: 0.35rem 0;
}

#main img.img,
#main img.flr {
  float: right;
  margin: 0.2rem 0 1rem 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--az-line);
  box-shadow: 0 4px 14px rgba(20, 50, 40, 0.1);
  background: #fff;
}

#main sub {
  font-size: 0.75em;
}

#menu {
  background: var(--az-surface);
  border: 1px solid var(--az-line);
  border-radius: var(--az-radius);
  padding: 1rem 0.9rem 1.15rem;
  box-shadow: var(--az-shadow);
  position: sticky;
  top: 1rem;
}

#menu hr,
#menu .nod[href] {
  display: none;
}

#menu h3 {
  margin: 0 0 0.75rem;
  padding: 0 0.35rem;
  font-family: var(--az-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--az-brand-dark);
}

#menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#menu li {
  margin: 0;
}

#menu a {
  display: block;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--az-ink);
  font-size: 0.95rem;
  line-height: 1.35;
  font-weight: 600;
}

#menu a:hover {
  background: var(--az-bg);
  color: var(--az-brand);
}

#menu li.act > a,
#menu a[aria-current="page"] {
  background: var(--az-accent-soft);
  color: var(--az-brand-dark);
  font-weight: 700;
}

#cleaner {
  clear: both;
  height: 0;
}

#page > hr {
  display: none;
}

#footer {
  margin-top: 1.5rem;
  padding: 1.1rem 1.25rem;
  border-top: 1px solid var(--az-line);
  color: var(--az-muted);
  font-size: 0.92rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: space-between;
  align-items: center;
}

#footer a {
  color: var(--az-muted);
}

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

.m30 {
  margin-left: 1.5rem;
}

.dr-unlinked {
  cursor: inherit;
}

@media (max-width: 860px) {
  #page {
    width: min(100% - 1.25rem, var(--az-max));
    padding-top: 0.85rem;
  }

  #header {
    padding: 1rem 1.1rem;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  #menu {
    position: static;
    order: 2;
  }

  #main {
    padding: 1.25rem 1.1rem 1.6rem;
  }

  #main img.img,
  #main img.flr {
    float: none;
    display: block;
    margin: 0.75rem auto 1rem;
    max-width: min(100%, 220px);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  a {
    transition: none;
  }
}