/* ==========================================================================
   Deep Ocean Documentation Platform Design System
   ========================================================================== */

/* Design Tokens & CSS Variables */
:root {
  --bg-primary: hsl(222, 28%, 7%);
  --bg-secondary: hsl(222, 24%, 11%);
  --bg-tertiary: hsl(222, 20%, 15%);
  
  --accent-color: hsl(190, 90%, 45%);
  --accent-glow: hsla(190, 90%, 45%, 0.15);
  --accent-blue: hsl(210, 85%, 55%);
  --accent-green: hsl(145, 65%, 45%);
  --accent-orange: hsl(28, 85%, 55%);
  
  --text-main: hsl(210, 20%, 90%);
  --text-muted: hsl(215, 14%, 65%);
  --text-dark: hsl(220, 20%, 40%);
  
  --glass-bg: hsla(222, 24%, 10%, 0.70);
  --glass-border: hsla(220, 20%, 25%, 0.35);
  --glass-blur: blur(14px);
  
  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-heading: 'Outfit', sans-serif;
  --font-family-mono: 'Consolas', 'Fira Code', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --sidebar-width: 320px;
  --border-radius-lg: 12px;
  --border-radius-md: 8px;
  --border-radius-sm: 4px;
}

/* Reset and Core Settings */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--glass-border) transparent;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Layout Framework */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  position: relative;
}

/* Sidebar Styling (Glassmorphism Panel) */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  transition: var(--transition-smooth);
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid var(--glass-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.logo-icon {
  font-size: 24px;
  color: var(--accent-color);
  filter: drop-shadow(0 0 8px var(--accent-color));
}

.logo-text {
  font-family: var(--font-family-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.accent-text {
  color: var(--accent-color);
}

.subtitle {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 500;
}

/* Search Box Container */
.search-box {
  margin: 16px 20px;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  font-size: 14px;
}

#search-input {
  width: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 10px 14px 10px 38px;
  color: var(--text-main);
  font-family: var(--font-family-sans);
  font-size: 14px;
  outline: none;
  transition: var(--transition-smooth);
}

#search-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

#search-clear-btn {
  position: absolute;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  outline: none;
}

#search-clear-btn:hover {
  color: var(--text-main);
}

/* Sidebar Navigation Items */
.nav-groups {
  flex-grow: 1;
  overflow-y: auto;
  padding: 0 16px 24px 16px;
}

.nav-group {
  margin-top: 20px;
}

.group-title {
  font-family: var(--font-family-heading);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1.5px;
  font-weight: 600;
  margin-left: 8px;
  margin-bottom: 8px;
}

.nav-list {
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--text-main);
  background-color: hsla(220, 20%, 25%, 0.15);
  border: 1px solid var(--glass-border);
}

.nav-link.active {
  color: var(--accent-color);
  background-color: var(--accent-glow);
  border: 1px solid hsla(190, 90%, 45%, 0.25);
  font-weight: 600;
}

.nav-link.active .link-icon {
  color: var(--accent-color);
  filter: drop-shadow(0 0 4px var(--accent-color));
}

.link-icon {
  font-size: 16px;
  width: 18px;
  text-align: center;
}

.index-num {
  font-family: var(--font-family-heading);
  font-size: 12px;
  font-weight: bold;
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  min-width: 24px;
  text-align: center;
}

.nav-link.active .index-num {
  background-color: var(--accent-color);
  color: var(--bg-primary);
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--glass-border);
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Main Reader Shell */
.content-wrapper {
  flex-grow: 1;
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  position: relative;
}

/* Header bar */
.content-header {
  padding: 24px 40px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: sticky;
  top: 0;
  z-index: 50;
}

#doc-title {
  font-family: var(--font-family-heading);
  font-size: 24px;
  font-weight: 600;
  color: var(--text-main);
}

/* Status Badges */
.meta-badges {
  display: flex;
  gap: 8px;
  align-items: center;
}

.badge {
  font-family: var(--font-family-heading);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-version {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.badge-status {
  background-color: hsla(145, 65%, 45%, 0.15);
  color: var(--accent-green);
  border: 1px solid hsla(145, 65%, 45%, 0.3);
}

.badge-date {
  background-color: hsla(28, 85%, 55%, 0.1);
  color: var(--accent-orange);
  border: 1px solid hsla(28, 85%, 55%, 0.25);
}

/* Reading container markup body */
.markdown-body {
  padding: 40px 60px 80px 60px;
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
  animation: fadeIn 0.4s ease-out;
}

/* Loading indicator screen */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
  gap: 16px;
}

.loading-icon {
  font-size: 48px;
  color: var(--accent-color);
  filter: drop-shadow(0 0 10px var(--accent-glow));
}

.loading-state h2 {
  font-family: var(--font-family-heading);
  font-size: 22px;
  color: var(--text-main);
  margin-top: 12px;
}

.loading-state p {
  color: var(--text-muted);
  max-width: 450px;
  font-size: 14px;
}

/* Markdown parsing adjustments */
.markdown-body h1 {
  font-family: var(--font-family-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--glass-border);
}

.markdown-body h2 {
  font-family: var(--font-family-heading);
  font-size: 22px;
  font-weight: 600;
  color: var(--accent-blue);
  margin-top: 32px;
  margin-bottom: 16px;
}

.markdown-body h3 {
  font-family: var(--font-family-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 24px;
  margin-bottom: 12px;
}

.markdown-body p {
  margin-bottom: 16px;
  color: var(--text-main);
  font-size: 15px;
}

.markdown-body a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 550;
  transition: var(--transition-smooth);
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 20px;
  margin-left: 24px;
}

.markdown-body li {
  margin-bottom: 8px;
}

/* Custom Table markup */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.markdown-body th {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  text-align: left;
  border: 1px solid var(--glass-border);
  padding: 10px 14px;
  font-weight: 650;
}

.markdown-body td {
  border: 1px solid var(--glass-border);
  padding: 10px 14px;
  color: var(--text-muted);
}

.markdown-body tr:nth-child(even) {
  background-color: hsla(220, 20%, 25%, 0.1);
}

/* Blockquotes & Alert boxes overrides */
.markdown-body blockquote {
  border-left: 4px solid var(--accent-color);
  background-color: var(--bg-secondary);
  padding: 14px 20px;
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  margin: 20px 0;
}

.markdown-body blockquote p {
  margin-bottom: 0px;
  color: var(--text-muted);
  font-style: italic;
}

/* GitHub style alert banners overrides */
.markdown-body blockquote.alert {
  border-radius: var(--border-radius-md);
  margin: 24px 0;
}

blockquote.alert-note {
  border-left: 4px solid var(--accent-blue);
  background-color: hsla(210, 85%, 55%, 0.05);
}

blockquote.alert-important {
  border-left: 4px solid var(--accent-color);
  background-color: hsla(190, 90%, 45%, 0.05);
}

blockquote.alert-warning {
  border-left: 4px solid var(--accent-orange);
  background-color: hsla(28, 85%, 55%, 0.05);
}

blockquote.alert-caution {
  border-left: 4px solid hsl(0, 85%, 55%);
  background-color: hsla(0, 85%, 55%, 0.05);
}

/* Custom styled Mermaid diagram frames */
.mermaid {
  background-color: var(--bg-secondary) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--border-radius-lg);
  padding: 24px;
  margin: 24px 0;
  display: flex;
  justify-content: center;
}

/* Code and Codeblock styles override */
.markdown-body code {
  font-family: var(--font-family-mono);
  background-color: var(--bg-tertiary);
  color: var(--accent-orange);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  font-size: 85%;
}

.markdown-body pre {
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg) !important;
  background-color: #1d1f21 !important; /* Prism Okaidia background mapping */
  padding: 16px 20px !important;
  overflow: auto;
}

.markdown-body pre code {
  color: #f8f8f2;
  padding: 0;
  background-color: transparent;
  font-size: 13.5px;
}

/* Horizontal separators */
.markdown-body hr {
  height: 2px;
  background-color: var(--glass-border);
  border: none;
  margin: 40px 0;
}

/* Floating Action Scrolls */
.scroll-top-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border: none;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: 0 4px 15px hsla(190, 90%, 45%, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  z-index: 200;
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px hsla(190, 90%, 45%, 0.5);
}

/* Responsive Mobile Screen Overrides */
.mobile-toggle {
  display: none;
}

@media (max-width: 1024px) {
  .sidebar {
    position: absolute;
    left: calc(-1 * var(--sidebar-width));
    box-shadow: 20px 0 30px rgba(0, 0, 0, 0.4);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .mobile-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    color: var(--text-main);
    cursor: pointer;
    z-index: 105;
    transition: var(--transition-smooth);
  }
  
  .mobile-toggle:hover {
    border-color: var(--accent-color);
  }
  
  .content-header {
    padding-left: 80px;
  }
  
  .markdown-body {
    padding: 30px 24px;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}