/* =============================================================
   PODEM Česká republika — Redesigned stylesheet
   Replaces the original fixed-width float layout.

   HOW TO CUSTOMIZE:
   ─ Colors:     Edit the CSS variables in :root below.
   ─ Typography: Change --font-body / --font-size-base in :root.
   ─ Spacing:    Adjust --space-* tokens.
   ─ Breakpoints: sm = 600px, md = 768px, lg = 960px
   ============================================================= */

/* ─── 1. DESIGN TOKENS (CSS variables) ─────────────────────── */
:root {
  /* Brand colors */
  --color-brand-yellow:   #ffdd00;
  --color-brand-yellow-dark: #e6c700; /* hover state */
  --color-nav-bg:         #111111;
  --color-nav-text:       #ffffff;
  --color-nav-active:     #ffdd00;

  /* Page chrome */
  --color-bg-page:        #e8e8e8;
  --color-bg-card:        #ffffff;
  --color-footer-bg:      #6f7075;
  --color-footer-text:    #ffffff;
  --color-border:         #d8d8d8;

  /* Body text */
  --color-text:           #444444;
  --color-text-light:     #666666;
  --color-link:           #1a5c99;
  --color-link-hover:     #0d3d6e;

  /* Typography */
  --font-body: Arial, Helvetica, sans-serif;
  --font-size-base: 1rem;       /* = 16px in modern browsers */
  --line-height: 1.6;

  /* Spacing scale */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;

  /* Layout */
  --sidebar-width: 250px;
  --wrapper-max:   960px;
  --header-height: 180px;
  --logo-bg:       var(--color-brand-yellow);
}

/* ─── 2. RESET / BASE ───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%; /* 16px base — replaces legacy 75% */
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg-page);
  background-image: url(img/body_bg.jpg); /* original body bg if present */
  background-repeat: repeat;
}

ul {
  list-style: none;
  padding: 0;
}

a {
  color: var(--color-link);
  text-decoration: none;
}
a:hover,
a:focus {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* Visible focus ring for keyboard users */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-brand-yellow);
  outline-offset: 2px;
}

/* ─── 3. SKIP LINK (accessibility) ─────────────────────────── */
/* Normally hidden off-screen; appears on focus for keyboard users */
.skip-link {
  position: absolute;
  top: -999px;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-nav-bg);
  color: var(--color-nav-text);
  font-weight: bold;
  border-radius: 0 0 4px 4px;
}
.skip-link:focus {
  top: 0;
}

/* ─── 4. PAGE WRAPPER ───────────────────────────────────────── */
#wrapper {
  max-width: var(--wrapper-max);
  width: 100%;
  margin: 0 auto var(--space-xl) auto;
  background-color: var(--color-bg-card);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
}

/* ─── 5. HEADER ─────────────────────────────────────────────── */
header {
  /* PRESERVED: original header background image */
  background-image: url(img/header_inner.jpg);
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  min-height: var(--header-height);
  position: relative;
}

/* PRESERVED: logo block with yellow background */
#logo {
  width: 260px;
  min-height: 120px;
  background-color: var(--logo-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* PRESERVED: logo image — src="img/logo.png" untouched in HTML */
#logo img {
  width: 200px;
  height: auto;        /* was fixed 39px; auto keeps aspect ratio */
  display: block;
}

/* ─── 5a. TOP NAVIGATION ────────────────────────────────────── */
/* PRESERVED: all hrefs, all link text */
#primary-nav {
  flex: 1;
  align-self: flex-end;
  background-color: var(--color-nav-bg);
}

#primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  height: 60px;
  align-items: stretch;
}

#primary-nav ul li {
  display: flex;
}

#primary-nav a {
  color: var(--color-nav-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  background-color: transparent;
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s;
}
#primary-nav a:hover,
#primary-nav a:focus {
  color: var(--color-nav-active);
  text-decoration: none;
}

/* PRESERVED: .active class highlight */
#primary-nav a.active,
.active {
  color: var(--color-nav-active);
}

/* ─── 5b. MOBILE MENU TOGGLE ────────────────────────────────── */
.redesign-menu-toggle {
  display: none; /* hidden on desktop */
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--color-nav-bg);
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
  gap: 5px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 4px;
}

.redesign-hamburger {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-nav-text);
  border-radius: 2px;
  margin: 2px 0;
}

/* ─── 6. CONTENT GRID ───────────────────────────────────────── */
/* Desktop: two-column (sidebar left, main right)
   Mobile:  single column (sidebar below main on small screens) */
.redesign-content-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-areas: "sidebar main";
  align-items: start;
}

aside {
  grid-area: sidebar;
  padding: var(--space-lg) var(--space-md);
  border-right: 1px solid var(--color-border);
}

main {
  grid-area: main;
  padding: var(--space-lg) var(--space-xl);
}

/* ─── 7. SIDEBAR / SIDE NAVIGATION ─────────────────────────── */
/* PRESERVED: .nav and .sub-menu classes; all hrefs and text */
aside h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-brand-yellow);
}

.nav a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9rem;
}
.nav a:hover,
.nav a:focus {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.nav > li {
  border-top: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-xs);
}
.nav > li:first-child {
  border-top: none;
}

/* Sub-menu indented under parent */
.sub-menu {
  padding: var(--space-xs) 0 0 var(--space-md);
}
.sub-menu li {
  padding: var(--space-xs) var(--space-xs);
  font-size: 0.85rem;
}

/* ─── 8. MAIN CONTENT / ARTICLE ─────────────────────────────── */
article h2 {
  font-size: 1.3rem;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 3px solid var(--color-brand-yellow);
}

article h3 {
  font-size: 1rem;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--color-text);
}

.redesign-company-address {
  font-style: normal;
}

/* Contact definition list (replaces presentational <table>) */
.redesign-contact-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-xs) var(--space-md);
  font-size: 0.95rem;
  margin-top: var(--space-sm);
}
.redesign-contact-list dt {
  font-weight: bold;
  color: var(--color-text-light);
}
.redesign-contact-list dd {
  margin: 0;
}

.redesign-sections-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--space-xl);
}

.redesign-sections-col {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--color-border);
  padding-right: var(--space-xl);
}

.redesign-sections-col:last-child {
  border-right: none;
  padding-right: 0;
  padding-left: var(--space-xl);
}

.redesign-contact-section {
  margin-bottom: var(--space-lg);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

.redesign-partners {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.redesign-partner {
  flex: 1 1 200px;
}

.redesign-partner h4 {
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

/* ─── 9. FOOTER ─────────────────────────────────────────────── */
footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  text-align: center;
  padding: var(--space-md);
  font-size: 0.85rem;
}

/* ─── 10. RESPONSIVE BREAKPOINTS ────────────────────────────── */

/* Medium: tablet (≤ 768px) — shrink sidebar */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 180px;
  }
  #logo {
    width: 180px;
    min-height: 90px;
  }
  #logo img {
    width: 150px;
  }
}

/* Small: mobile (≤ 600px) — single column, show hamburger */
@media (max-width: 600px) {
  #wrapper {
    margin: 0;
    box-shadow: none;
  }

  header {
    min-height: auto;
    flex-wrap: wrap;
  }

  #logo {
    width: 100%;
    min-height: 70px;
    justify-content: flex-start;
    padding-left: var(--space-md);
  }

  /* Show hamburger, hide desktop nav by default */
  .redesign-menu-toggle {
    display: flex;
  }

  #primary-nav {
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  /* JS adds this class to reveal menu */
  #primary-nav.redesign-nav-open {
    max-height: 400px;
  }

  #primary-nav ul {
    flex-direction: column;
    height: auto;
  }

  #primary-nav a {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  /* Stack sidebar below main on mobile */
  .redesign-content-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "main"
      "sidebar";
  }

  aside {
    border-right: none;
    border-top: 1px solid var(--color-border);
  }

  main {
    padding: var(--space-md);
  }

  .redesign-contact-list {
    grid-template-columns: 1fr;
  }
  .redesign-contact-list dt {
    margin-top: var(--space-sm);
  }

  .redesign-sections-grid {
    grid-template-columns: 1fr;
  }

  .redesign-sections-col,
  .redesign-sections-col:last-child {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0;
    padding-left: 0;
    padding-bottom: var(--space-lg);
    margin-bottom: var(--space-lg);
  }

  .redesign-sections-col:last-child {
    border-bottom: none;
    margin-bottom: 0;
  }
}