/* =============================================================================
   DREAMCAST ERA (1998-1999) RETRO THEME
   ============================================================================= */

/* Import a retro pixel-style font */
@import url('https://fonts.googleapis.com/css2?family=VT323&family=Press+Start+2P&family=Share+Tech+Mono&display=swap');

:root {
    /* Dreamcast color palette */
    --dc-orange: #FF6600;
    --dc-blue: #0066FF;
    --dc-dark-blue: #001133;
    --dc-light-blue: #00AAFF;
    --dc-gray: #CCCCCC;
    --dc-dark-gray: #1a1a2e;
    --dc-black: #0f0f1a;
    --dc-white: #E0E0E0;
    --dc-green: #00FF66;
    --dc-purple: #9933FF;
}

/* Hide sidebar chapter numbers */
/* mdBook uses CSS counters to generate numbers - disable them */
.sidebar ol {
    list-style-type: none !important;
    counter-reset: none !important;
}

.sidebar li {
    list-style: none !important;
}

.sidebar li::before {
    content: none !important;
    display: none !important;
}

/* Hide the section number spans */
.section-number {
    display: none !important;
}

/* Reset any counter-based numbering */
.sidebar .chapter {
    counter-reset: none !important;
}

.sidebar .chapter li {
    counter-increment: none !important;
}

.sidebar .chapter li::before {
    content: "" !important;
}

/* Remove any top borders that might cause double lines */
.content main {
    margin-top: 0 !important;
}

#content {
    border-top: none !important;
}

/* Remove ALL potential borders that could cause the orange line */
.menu-bar-sticky-container,
#menu-bar,
.menu-bar,
#searchbar-outer,
.search-wrapper,
#searchresults-header,
.page-wrapper,
.content-wrapper,
.page,
#content,
.content,
#main,
main,
.main {
    border-bottom: none !important;
    border-top: none !important;
}

/* Remove borders from all wrappers */
#searchbar-outer,
.ayu .content,
.navy .content,
.coal .content {
    border: none !important;
}

/* The culprit might be the content main top border */
.content main {
    border-top: none !important;
}

/* Make content full width - remove all constraints */
.page-wrapper {
    max-width: 100% !important;
    background: #0a0a12 !important;
}

#content,
.page-wrapper .page,
.content {
    max-width: 100% !important;
    width: auto !important;
    background: #0a0a12 !important;
}

/* Ensure main content fills the space but leaves room for nav arrows */
.content main {
    width: calc(100% - 100px) !important;
    max-width: none !important;
    margin-right: auto !important;
}

/* Adjust nav buttons to not overlap content */
.nav-chapters {
    position: fixed !important;
}

/* =============================================================================
   BACKGROUND & BODY
   ============================================================================= */

html {
    background: #0a0a12 !important;
}

body {
    font-family: 'Share Tech Mono', 'Courier New', monospace !important;
    background: #0a0a12 !important;
}

/* Subtle scanline effect overlay */
.content main::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.1) 0px,
        rgba(0, 0, 0, 0.1) 1px,
        transparent 1px,
        transparent 3px
    );
    pointer-events: none;
    z-index: 1000;
    opacity: 0.3;
}

/* =============================================================================
   SIDEBAR
   ============================================================================= */

.sidebar {
    background: linear-gradient(180deg, var(--dc-dark-blue) 0%, var(--dc-black) 100%) !important;
    border-right: none !important;
}

.sidebar .sidebar-scrollbox {
    background: transparent !important;
}

/* Section headers in sidebar */
.sidebar .chapter-title {
    color: var(--dc-orange) !important;
    font-family: 'VT323', monospace !important;
    font-size: 1.4em !important;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--dc-orange);
    border-bottom: none;
    padding-bottom: 8px;
    margin-bottom: 8px;
}

/* Sidebar links */
.sidebar a {
    color: var(--dc-light-blue) !important;
    font-family: 'Share Tech Mono', monospace !important;
    transition: all 0.2s ease;
}

.sidebar a:hover {
    color: var(--dc-orange) !important;
    text-shadow: 0 0 8px var(--dc-orange);
    background: rgba(255, 102, 0, 0.1) !important;
}

.sidebar .active {
    color: var(--dc-green) !important;
    text-shadow: 0 0 10px var(--dc-green);
    border-left: 4px solid var(--dc-green) !important;
    background: rgba(0, 255, 102, 0.1) !important;
}

/* Scroll-spy active state for current section (mdBook's built-in) */
.sidebar a.current-header,
.sidebar .current-header {
    color: var(--dc-orange) !important;
    text-shadow: 0 0 8px var(--dc-orange);
    background: rgba(255, 102, 0, 0.15) !important;
}

/* On-this-page section styling */
.sidebar .on-this-page {
    padding-left: 10px;
    margin-top: 5px;
}

.sidebar .on-this-page a {
    font-size: 0.9em;
}

.sidebar .header-item {
    list-style: none;
}

.sidebar .header-in-summary {
    color: var(--dc-light-blue) !important;
    transition: all 0.2s ease;
}

.sidebar .header-in-summary:hover {
    color: var(--dc-orange) !important;
}

/* =============================================================================
   MAIN CONTENT
   ============================================================================= */

.content {
    background: transparent !important;
    max-width: 100% !important;
    padding: 0 !important;
}

.content main {
    background: #0a0a12 !important;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 2em 80px 2em 60px;
    max-width: calc(100% - 120px) !important;
    margin: 0 auto !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
}

/* =============================================================================
   TYPOGRAPHY
   ============================================================================= */

/* Main headings - pixel style */
h1 {
    font-family: 'VT323', monospace !important;
    color: var(--dc-orange) !important;
    font-size: 3em !important;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: 
        3px 3px 0 var(--dc-dark-blue),
        0 0 20px var(--dc-orange);
    border-bottom: none;
    padding-bottom: 0.5em;
}

h2 {
    font-family: 'VT323', monospace !important;
    color: var(--dc-light-blue) !important;
    font-size: 2.2em !important;
    text-shadow: 2px 2px 0 var(--dc-dark-blue);
    border-left: 4px solid var(--dc-orange);
    padding-left: 1em;
    margin-left: -0.5em;
}

h3 {
    font-family: 'VT323', monospace !important;
    color: var(--dc-green) !important;
    font-size: 1.8em !important;
    text-shadow: 1px 1px 0 var(--dc-dark-blue);
}

h4, h5, h6 {
    font-family: 'VT323', monospace !important;
    color: var(--dc-purple) !important;
}

/* Paragraph text */
p, li {
    color: var(--dc-gray) !important;
    line-height: 1.8;
    font-size: 1.05em;
}

/* Links */
a {
    color: var(--dc-light-blue) !important;
    text-decoration: none;
    border-bottom: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--dc-orange) !important;
    text-shadow: 0 0 8px var(--dc-orange);
    border-bottom-color: var(--dc-orange);
}

/* Bold text */
strong, b {
    color: var(--dc-white) !important;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.3);
}

/* =============================================================================
   CODE BLOCKS - Terminal/CRT style
   ============================================================================= */

code {
    font-family: 'DejaVu Sans Mono', 'Menlo', 'Courier New', monospace !important;
    background: transparent !important;
    color: var(--dc-green) !important;
    border: none !important;
    padding: 0;
    border-radius: 0;
}

pre {
    background: #0a0a12 !important;
    border: none !important;
    border-radius: 12px !important;
    box-shadow:
        0 0 30px rgba(0, 102, 255, 0.4),
        0 0 60px rgba(0, 102, 255, 0.25),
        0 0 100px rgba(0, 102, 255, 0.1);
    padding: 1.8em !important;
    margin: 1.5em 0 !important;
}

pre code {
    color: var(--dc-green) !important;
    text-shadow: 0 0 2px rgba(0, 255, 102, 0.5);
    border: none !important;
    padding: 0 !important;
    background: transparent !important;
    font-family: 'DejaVu Sans Mono', 'Menlo', 'Courier New', monospace !important;
}

/* Syntax highlighting overrides */
.hljs-keyword {
    color: var(--dc-orange) !important;
}

.hljs-string {
    color: var(--dc-light-blue) !important;
}

.hljs-comment {
    color: #666688 !important;
    font-style: italic;
}

.hljs-function, .hljs-title {
    color: var(--dc-purple) !important;
}

.hljs-number {
    color: #FF6699 !important;
}

/* =============================================================================
   TABLES - Retro grid style
   ============================================================================= */

table {
    border-collapse: collapse;
    border: 2px solid var(--dc-orange) !important;
    background: rgba(0, 0, 0, 0.5);
}

th {
    background: linear-gradient(180deg, var(--dc-dark-blue) 0%, var(--dc-black) 100%) !important;
    color: var(--dc-orange) !important;
    font-family: 'VT323', monospace !important;
    font-size: 1.2em;
    text-transform: uppercase;
    border: 1px solid var(--dc-blue) !important;
    padding: 12px !important;
}

td {
    border: 1px solid var(--dc-blue) !important;
    color: var(--dc-gray) !important;
    padding: 10px !important;
}

tr:hover td {
    background: rgba(255, 102, 0, 0.1) !important;
}

/* =============================================================================
   BLOCKQUOTES
   ============================================================================= */

blockquote {
    border-left: 4px solid var(--dc-purple) !important;
    background: rgba(153, 51, 255, 0.1) !important;
    color: var(--dc-gray) !important;
    font-style: italic;
    padding: 1em;
    margin: 1em 0;
}

/* =============================================================================
   NAVIGATION ARROWS
   ============================================================================= */

.nav-chapters {
    color: var(--dc-orange) !important;
    font-size: 2em;
    transition: all 0.2s ease;
    background: none !important;
    background-color: transparent !important;
    opacity: 0.7;
}

.nav-chapters:hover {
    color: var(--dc-light-blue) !important;
    text-shadow: 0 0 15px var(--dc-light-blue);
    background: none !important;
    background-color: transparent !important;
    opacity: 1;
}

/* Remove ALL dark overlay effects on nav hover */
.nav-wrapper,
.nav-chapters::before,
.nav-chapters::after,
.previous,
.next,
a.nav-chapters {
    background: none !important;
    background-color: transparent !important;
    background-image: none !important;
}

/* Ensure the nav link areas don't have gradient overlays */
.nav-chapters.previous,
.nav-chapters.next {
    background: none !important;
}

/* Make left and right nav spaces equal and outside content */
.nav-chapters.previous,
.nav-chapters.next {
    width: 50px !important;
    min-width: 50px !important;
    max-width: 50px !important;
    padding: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    position: fixed !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
}

.nav-chapters.previous {
    left: 310px !important;  /* After the sidebar */
}

.nav-chapters.next {
    right: 20px !important;
}

/* =============================================================================
   TOP MENU BAR
   ============================================================================= */

.menu-bar {
    background: #0a0a12 !important;
    border-bottom: none !important;
}

.menu-bar .icon-button {
    color: var(--dc-light-blue) !important;
}

.menu-bar .icon-button:hover {
    color: var(--dc-orange) !important;
}

.menu-title {
    font-family: 'VT323', monospace !important;
    font-size: 1.5em !important;
    color: var(--dc-orange) !important;
    text-shadow: 0 0 10px var(--dc-orange);
    letter-spacing: 3px;
}

/* =============================================================================
   SEARCH
   ============================================================================= */

#searchbar {
    background: var(--dc-black) !important;
    border: 2px solid var(--dc-blue) !important;
    color: var(--dc-green) !important;
    font-family: 'Share Tech Mono', monospace !important;
}

#searchbar::placeholder {
    color: #444466 !important;
}

.search-results {
    background: var(--dc-dark-blue) !important;
    border: 2px solid var(--dc-orange) !important;
}

/* =============================================================================
   SCROLLBAR - Retro style
   ============================================================================= */

::-webkit-scrollbar {
    width: 12px;
    background: var(--dc-black);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--dc-blue) 0%, var(--dc-dark-blue) 100%);
    border: 2px solid var(--dc-orange);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dc-orange);
}

/* =============================================================================
   LISTS
   ============================================================================= */

ul, ol {
    color: var(--dc-gray) !important;
}

li::marker {
    color: var(--dc-orange) !important;
}

/* =============================================================================
   IMAGES
   ============================================================================= */

img {
    border: 3px solid var(--dc-blue);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
}

/* =============================================================================
   SELECTION
   ============================================================================= */

::selection {
    background: var(--dc-orange) !important;
    color: var(--dc-black) !important;
}

/* =============================================================================
   MOBILE RESPONSIVE
   ============================================================================= */

@media screen and (max-width: 768px) {
    /* Disable scanline effect on mobile for performance */
    .content main::before {
        display: none;
    }

    /* Main content - full width with reasonable padding */
    .content main {
        width: 100% !important;
        max-width: 100% !important;
        padding: 1em 1em 1em 1em !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    /* Typography scaling */
    h1 {
        font-size: 1.8em !important;
        letter-spacing: 1px;
    }

    h2 {
        font-size: 1.5em !important;
    }

    h3 {
        font-size: 1.3em !important;
    }

    p, li {
        font-size: 0.95em;
        line-height: 1.6;
    }

    /* Code blocks */
    pre {
        padding: 1em !important;
        margin: 1em 0 !important;
        overflow-x: auto !important;
        font-size: 0.85em !important;
    }

    pre code {
        white-space: pre !important;
    }

    /* Tables - make scrollable */
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        max-width: 100%;
    }

    th, td {
        padding: 8px !important;
        font-size: 0.9em;
    }

    /* Hide fixed nav arrows on mobile - mdbook has its own mobile nav */
    .nav-chapters.previous,
    .nav-chapters.next {
        position: static !important;
        transform: none !important;
        width: auto !important;
        min-width: auto !important;
        max-width: auto !important;
    }

    /* Menu bar */
    .menu-title {
        font-size: 1.2em !important;
        letter-spacing: 1px;
    }

    /* Images - constrain to viewport */
    img {
        max-width: 100% !important;
        height: auto !important;
    }

    /* Blockquotes */
    blockquote {
        padding: 0.8em;
        margin: 0.8em 0;
    }

    /* Sidebar adjustments when visible */
    .sidebar {
        width: 100% !important;
    }
}

/* Even smaller screens (phones in portrait) */
@media screen and (max-width: 480px) {
    .content main {
        padding: 0.8em !important;
    }

    h1 {
        font-size: 1.5em !important;
    }

    h2 {
        font-size: 1.3em !important;
        padding-left: 0.3em;
    }

    h3 {
        font-size: 1.1em !important;
    }

    pre {
        padding: 0.8em !important;
        font-size: 0.8em !important;
        border-radius: 8px !important;
    }

    th, td {
        padding: 6px !important;
        font-size: 0.85em;
    }

    .menu-title {
        font-size: 1em !important;
    }
}