/* 1. Base & Global Styles
-------------------------------------------------- */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --primary-color: #223355; /* A professional blue */
  --border-color: #e0e0e0;
  --sidebar-bg: #f8f9fa;
  --code-bg: #eff2f5;
  --code-color: #2d3748;
  --header-bg: #223355;
  --header-hover-bg: #92a8d3;
  --header-color: White;
  --header-titles: #dae0f1;
  --link-color: var(--primary-color);
  --link-hover-color: #003d69;
  --top-bar-height: 55px; /* Control top bar height */
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, Helvetica, Arial, "Segoe UI", Roboto, sans-serif, "Segoe UI Symbol";
  line-height: 1.4rem;
  color: var(--text-color);
  background-color: var(--bg-color);
  margin: 0;
  padding-top: var(--top-bar-height); /* Make space for fixed top bar */
  display: flex;
  height: 100vh;
  box-sizing: border-box;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}

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

hr.section-separator { width: 100%; }
hr.method-separator { width: 50%; margin-left: 0; }


/* 2. Global Top Navigation Bar (from .content-bar-top)
   We use `position: fixed` to visually move it to the
   top of the viewport.
-------------------------------------------------- */
.content-bar-top {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--top-bar-height);
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  box-sizing: border-box;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.content-bar-top-body {
  position: static;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0;
  width: 100%;
}

/* Add "GNUstep Documentation" title using a pseudo-element */
.content-bar-top-body::before {
  content: "GNUstep Documentation";
  font-size: 1.1rem;
  font-weight: thin;
  color: var(--header-color);
  margin-right: 1.5rem;
  white-space: nowrap;
}

/* Style the navigation links as buttons */
.content-bar-top-body a {
  padding: 0.2rem 0.4rem;
  border-radius: 2px;
  color: var(--header-titles);
  font-size: 1.0rem;
  font-weight: bold;
  white-space: nowrap;
}

.content-bar-top-body a:hover {
  background-color: var(--header-hover-bg);
  color: var(--header-bg);
  text-decoration: none;
}

/* The <br> tags in the HTML are still there, so we hide them. */
.content-bar-top-body br {
  display: none;
}


/* 3. Sidebar & Main Content Layout
-------------------------------------------------- */
.content-bar {
  flex: 0 0 22em;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  /* The entire sidebar is now just the *bottom* part, which should scroll */
  overflow-y: auto;
}

.content-pane {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 2rem 3rem;
  box-sizing: border-box;
}

/* Reset original positioning for the now-scrolling list container */
.content-bar-bottom,
.content-bar-bottom-body {
    position: static;
    height: auto;
    width: auto;
    overflow: visible;
    border: none;
    padding: 1rem;
}


/* 4. Sidebar Navigation List Styling
-------------------------------------------------- */
h3.content-bar-index-section-header {
    font-size: 1.2rem;
    font-weight: bold;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--header-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
    line-height: 1.2rem;
}

h3.content-bar-index-section-header:first-child {
  margin-top: 0;
}

.content-bar-bottom-body p a {
    /* Reduced vertical padding for tighter spacing */
    padding: 0.2rem 0.4rem;
    border-radius: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.content-bar-bottom-body p a:hover {
    background-color: #e2e8f0;
    text-decoration: none;
}


/* 5. Main Content Styling (largely unchanged)
-------------------------------------------------- */
.content-pane-body {
}

.content-pane h1, .content-pane h2, .content-pane h3 {
  color: var(--header-color);
  margin-bottom: 1rem;
}

.content-pane h1 {
  font-size: 2.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  line-height: 2.2rem;
}

.content-pane h2.class {
  font-size: 1.75rem;
  margin-top: 3rem;
  color: var(--text-color);
  line-height: 1.75rem;
}

.content-pane h2.class a, .content-pane h2 a { color: inherit; }
h3.index-section-header {
  margin-top: 2rem;
  font-size: 1.2rem;
  line-height: 1.2rem;
}

.method, div[id^="ivariable"] {
  margin-top: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--primary-color);
}

.method h3, div[id^="ivariable"] h3 {
  margin-top: 0;
  font-size: 1.2rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  line-height: 1.2rem;
}


var, code, .desc a[rel="gsdoc"] {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background-color: var(--code-bg);
    color: var(--code-color);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    line-height: 0.9rem;
}

.availability, blockquote.declared {
  background-color: var(--sidebar-bg);
  border: 1px solid var(--border-color);
  border-left: 4px solid #7c90a2;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  margin: 1rem 0;
  font-size: 0.9rem;
  line-height: 0.9rem;
}

blockquote.declared dl { margin: 0; }
blockquote.declared dt { font-weight: bold; }
svg { margin: 1.5rem 0; }


/* 6. Responsive Design
-------------------------------------------------- */
@media (max-width: 900px) {
  body {
    flex-direction: column;
    line-height: 1.1rem;
    height: auto;
    padding-top: 0; /* Remove padding for a different mobile layout */
  }

  /* Stack the top bar and sidebar for mobile */
  .content-bar-top {
    position: static; /* Un-fix the header */
    height: auto;
    flex-direction: column;
    align-items: flex-start;
    box-shadow: none;
  }

  .content-bar-top-body {
    flex-direction: column;
    align-items: flex-start;
  }

  .content-bar-top-body::before {
    margin-bottom: 0.5rem;
    font-size: 1.0rem;
    font-weight: normal;
  }

  .content-bar-top-body a {
    width: 100%;
    border-radius: 0;
    font-weight: normal;
  }

  .content-bar {
    flex: 1 1 auto;
    height: auto;
    max-height: 40vh; /* Sidebar gets 40% of vertical height */
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .content-pane {
    flex: 1 1 auto;
    height: auto;
    width: auto;
    padding: 1.5rem;
  }
}