/* ===============================
   Theme Variables
================================*/
header.site-header {
  --bg: #f8f9fa;
  --text: #212529;
  --muted: #6c757d;
  --header-bg: #e9ecef;
  --border: #dee2e6;
  --accent: #4169E1; /* Royal blue */
  --accent-hover: #1E3A8A; /* Darker royal blue */
  --pill-bg: #ffffff;
  --pill-text: #212529;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.1);
}

/* ===============================
   Base Layout
================================*/
* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

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

main { 
  flex: 1; 
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
  background: var(--bg);
}

main h2 {
  margin-bottom: 1rem;
  font-size: 1.75rem;
  color: var(--text);
}

h1 { line-height: 1.5; margin: 0; }

/* ===============================
   Reader / Navigation Bar
================================*/
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

/* Navigation bar wrapper */
.nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center; /* center all content */
  position: relative;       /* enables absolute hamburger positioning */
  padding: .75rem 1rem;
  text-align: center;
}

/* Website Title */
.app_name {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  font-size: 2.0rem;
  display: inline-block;
  margin: 0;
}

/* Hamburger Button */
.nav_toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: .375rem;
  padding: .4rem .6rem;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 20;
}

.nav_toggle:hover,
.nav_toggle:focus {
  background: var(--accent);
  color: #ffffff;
  border: 1px solid var(--border);
}

/* ===============================
   Collapsible Section (Topics + Search)
================================*/
#collapsableContent {
  padding: .5rem 1rem 1rem;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  transition: max-height 0.3s ease-out, opacity 0.3s ease-out, padding 0.3s ease-out;
  overflow: hidden;
}

#collapsableContent[hidden] {
  display: none !important;
}

/* ===============================
   Responsive Behavior
================================*/
/* Mobile: Hide collapsible content by default, show hamburger */
@media (max-width: 767px) {
  #collapsableContent {
    max-height: 0;
    padding: 0 1rem;
    opacity: 0;
    border-bottom: none;
    display: block !important;
  }

  #collapsableContent:not([hidden]) {
    max-height: 500px;
    padding: .5rem 1rem 1rem;
    opacity: 1;
    border-bottom: 1px solid var(--border);
  }

  #collapsableContent[hidden] {
    max-height: 0 !important;
    padding: 0 1rem !important;
    opacity: 0 !important;
    border-bottom: none !important;
    display: block !important;
  }

  .nav_toggle {
    display: inline-flex;
  }
}

/* Desktop: Make collapsible content toggleable, keep hamburger visible */
@media (min-width: 768px) {
  #collapsableContent {
    max-height: 500px;
    padding: .5rem 1rem 1rem;
    opacity: 1;
    border-bottom: 1px solid var(--border);
    display: block !important;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out, padding 0.3s ease-out;
  }

  #collapsableContent[hidden] {
    max-height: 0 !important;
    padding: 0 1rem !important;
    opacity: 0 !important;
    border-bottom: none !important;
    display: block !important;
  }

  /* Hamburger is visible on desktop */
  .nav_toggle {
    display: inline-flex;
  }
}

/* ===============================
   Topic Pills
================================*/
.topics-pills {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  padding: .5rem 0 1rem;
}

.pill {
  text-decoration: none;
  padding: .375rem .75rem;
  border-radius: 9999px;
  background: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--border);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.pill:hover,
.pill:focus {
  background: var(--accent);
  color: #fff;
}

/* ===============================
   Search Bar
================================*/
.search_bar {
  max-width: 1100px;
  padding: 0 1rem;
  margin: .25rem auto 0;
  display: flex;
  justify-content: center;
}

#searchform {
  display: flex;
  flex-wrap: initial;
  gap: .5rem;
  align-items: center;
  justify-content: center;
  width: min(100%, 500px);
}

#searchInput {
  flex: 1 1 680px;
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .5rem .75rem;
}

.search_btn {
  appearance: none;
  border: 1px solid transparent;
  padding: .625rem 1rem;
  border-radius: .5rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--pill-bg);
  color: var(--pill-text);
}

.search_btn:hover,
.search_btn:focus {
  background: var(--accent);
  color: #ffffff;
  border: 1px solid var(--border);
}

.help {
  color: var(--muted);
  font-size: .875rem;
  text-align: center;
}

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

/* ===============================
   Country Selector
================================*/
.country-selector-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.5rem 1rem;
}

.country-selector-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.country-selector-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  max-width: 500px;
  justify-content: center;
}

.country-label-text {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.country-select {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--pill-bg);
  color: var(--pill-text);
  font-size: 1rem;
  cursor: pointer;
  min-width: 200px;
}

.country-select:hover,
.country-select:focus {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.country-status {
  font-size: 0.875rem;
  color: var(--muted);
  text-align: center;
  min-height: 1.25rem;
  padding: 0.25rem 0;
}

.country-status.info {
  color: var(--accent);
}

.country-status.success {
  color: #059669;
}

.country-status.warning {
  color: #d97706;
}

.country-status.error {
  color: #dc2626;
}

/* ===============================
   Accessibility & Focus
================================*/
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

:target {
  scroll-margin-top: 80px;
}