:root {
    /* LUFS Color Palette - Brand Aligned */
    --lufs-teal: #78BEBA;
    --lufs-red: #D35233;
    --lufs-yellow: #E7B225;
    --lufs-blue: #2069af;
    --lufs-black: #111111;
    --lufs-white: #fbf9e2;
    
    /* Flat, retro colors */
    --retro-gray: #c0c0c0;
    --retro-dark-gray: #808080;
    --retro-light-gray: #e0e0e0;
    --retro-border: #888888;
    
    /* Typography - Brand Aligned with fonts/ directory */
    --font-title: 'Host Grotesk', monospace;
    --font-body: 'Public Sans', sans-serif;
    
    /* Spacing - Simplified */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* No rounded corners - flat design */
    --radius: 0px;
    
    /* Flat shadows - no depth */
    --shadow-flat: 2px 2px 0 var(--retro-border);
    --shadow-inset: inset 1px 1px 0 var(--retro-light-gray);
}

/* Font Face Declarations for fonts/ directory */
@font-face {
    font-family: 'Host Grotesk';
    src: url('fonts/HostGrotesk-Regular.woff2') format('woff2'),
         url('fonts/HostGrotesk-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Host Grotesk';
    src: url('fonts/HostGrotesk-Medium.woff2') format('woff2'),
         url('fonts/HostGrotesk-Medium.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Host Grotesk';
    src: url('fonts/HostGrotesk-SemiBold.woff2') format('woff2'),
         url('fonts/HostGrotesk-SemiBold.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Host Grotesk';
    src: url('fonts/HostGrotesk-Bold.woff2') format('woff2'),
         url('fonts/HostGrotesk-Bold.woff') format('woff');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Public Sans';
    src: url('fonts/PublicSans-Regular.woff2') format('woff2'),
         url('fonts/PublicSans-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Public Sans';
    src: url('fonts/PublicSans-Medium.woff2') format('woff2'),
         url('fonts/PublicSans-Medium.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Public Sans';
    src: url('fonts/PublicSans-SemiBold.woff2') format('woff2'),
         url('fonts/PublicSans-SemiBold.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Public Sans';
    src: url('fonts/PublicSans-Bold.woff2') format('woff2'),
         url('fonts/PublicSans-Bold.woff') format('woff');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--lufs-white);
    background-color: var(--lufs-black);
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(120, 190, 186, 0.03) 2px,
            rgba(120, 190, 186, 0.03) 4px
        );
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    position: relative;
    overflow-x: hidden;
}

/* Animated Background Layer */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

/* Floating Shapes */
.floating-shape {
    position: absolute;
    opacity: 0.1;
    animation: floatAround 15s ease-in-out infinite;
}

.floating-shape.square {
    background: var(--lufs-teal);
    border: 1px solid var(--lufs-white);
}

.floating-shape.circle {
    background: var(--lufs-blue);
    border-radius: 50%;
    border: 1px solid var(--lufs-white);
}

.floating-shape.triangle {
    width: 0;
    height: 0;
    background: transparent;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 20px solid var(--lufs-yellow);
    opacity: 0.15;
}

.floating-shape.diamond {
    background: var(--lufs-red);
    transform: rotate(45deg);
    border: 1px solid var(--lufs-white);
}

/* Floating animations */
@keyframes floatAround {
    0% { 
        transform: translateY(0px) translateX(0px) rotate(0deg);
        opacity: 0.05;
    }
    25% { 
        transform: translateY(-30px) translateX(20px) rotate(90deg);
        opacity: 0.15;
    }
    50% { 
        transform: translateY(-10px) translateX(-15px) rotate(180deg);
        opacity: 0.1;
    }
    75% { 
        transform: translateY(-40px) translateX(10px) rotate(270deg);
        opacity: 0.2;
    }
    100% { 
        transform: translateY(0px) translateX(0px) rotate(360deg);
        opacity: 0.05;
    }
}

@keyframes floatSlow {
    0%, 100% { 
        transform: translateY(0px) translateX(0px);
        opacity: 0.08;
    }
    50% { 
        transform: translateY(-20px) translateX(15px);
        opacity: 0.15;
    }
}

@keyframes floatFast {
    0%, 100% { 
        transform: translateY(0px) translateX(0px) scale(1);
        opacity: 0.1;
    }
    33% { 
        transform: translateY(-15px) translateX(-10px) scale(1.1);
        opacity: 0.2;
    }
    66% { 
        transform: translateY(-25px) translateX(20px) scale(0.9);
        opacity: 0.15;
    }
}

/* Pulsing background elements */
.pulse-element {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, var(--lufs-teal) 0%, transparent 70%);
    animation: pulseGlow 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulseGlow {
    0%, 100% { 
        opacity: 0.03;
        transform: scale(1);
    }
    50% { 
        opacity: 0.08;
        transform: scale(1.2);
    }
}

/* Sticky Header */
.sticky-header {
    position: fixed;
    top: -80px;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--lufs-black);
    border-bottom: 2px solid var(--lufs-teal);
    transition: top 0.3s ease;
    padding: var(--spacing-sm) 0;
}

.sticky-header.visible {
    top: 0;
}

.sticky-header .header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sticky-header .logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.sticky-header .logo svg {
    width: 100%;
    height: 100%;
}

.sticky-header .header-text h1 {
    font-family: var(--font-title);
    font-size: 18px;
    font-weight: 600;
    color: var(--lufs-white);
    /* Improved readability - subtle CRT effect */
    text-shadow: 0 0 2px var(--lufs-teal);
}

.sticky-header .header-text p {
    font-size: 12px;
    color: var(--lufs-teal);
    font-weight: 400;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Main Header */
.main-header {
    background: var(--lufs-black);
    border: 3px solid var(--lufs-teal);
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.main-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--lufs-teal), var(--lufs-blue), var(--lufs-yellow), var(--lufs-red));
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo-link {
    text-decoration: none;
    transition: transform 0.2s ease;
}

.logo-link:hover {
    transform: scale(1.1);
}

.logo {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--lufs-white);
    box-shadow: var(--shadow-flat);
    cursor: pointer;
    background: var(--lufs-black);
}

.logo svg {
    width: 100%;
    height: 100%;
}

.header-text h1 {
    font-family: var(--font-title);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--lufs-white);
    /* Improved readability - subtle CRT glow */
    text-shadow: 0 0 3px var(--lufs-teal);
}

.header-text p {
    font-size: 1.1rem;
    color: var(--lufs-teal);
    font-weight: 400;
}

/* Manual Content */
.manual-content {
    background: var(--lufs-black);
    border: 2px solid var(--lufs-teal);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.manual-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--lufs-teal), var(--lufs-blue), var(--lufs-yellow), var(--lufs-red));
}

/* Typography - Brand Aligned with Improved Readability */
.manual-content h1 {
    font-family: var(--font-title);
    color: var(--lufs-teal);
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--lufs-teal);
    /* Subtle CRT glow for readability */
    text-shadow: 0 0 2px var(--lufs-teal);
}

.manual-content h2 {
    font-family: var(--font-title);
    color: var(--lufs-yellow);
    font-size: 1.8rem;
    font-weight: 500;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    /* Subtle CRT glow for readability */
    text-shadow: 0 0 2px var(--lufs-yellow);
}

.manual-content h3 {
    font-family: var(--font-title);
    color: var(--lufs-blue);
    font-size: 1.4rem;
    font-weight: 500;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    /* Subtle CRT glow for readability */
    text-shadow: 0 0 2px var(--lufs-blue);
}

.manual-content h4 {
    font-family: var(--font-title);
    color: var(--lufs-red);
    font-size: 1.2rem;
    font-weight: 500;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    /* Subtle CRT glow for readability */
    text-shadow: 0 0 2px var(--lufs-red);
}

.manual-content p {
    margin-bottom: var(--spacing-md);
    color: var(--lufs-white);
    font-size: 1rem;
    line-height: 1.7;
    /* No text-shadow on body text for maximum readability */
}

/* Tables - Flat Design */
.manual-content table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-lg) 0;
    background: var(--lufs-black);
    border: 2px solid var(--lufs-teal);
}

.manual-content th {
    background: var(--lufs-teal);
    color: var(--lufs-black);
    padding: var(--spacing-md);
    text-align: left;
    font-family: var(--font-title);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-right: 1px solid var(--lufs-black);
}

.manual-content th:last-child {
    border-right: none;
}

.manual-content td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--lufs-teal);
    border-right: 1px solid var(--lufs-teal);
    vertical-align: top;
    color: var(--lufs-white);
    background: var(--lufs-black);
}

.manual-content td:last-child {
    border-right: none;
}

.manual-content tr:last-child td {
    border-bottom: none;
}

.manual-content tr:hover td {
    background: rgba(120, 190, 186, 0.1);
    transition: background 0.2s ease;
}

/* Lists */
.manual-content ul, .manual-content ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.manual-content li {
    margin-bottom: var(--spacing-xs);
    color: var(--lufs-white);
}

.manual-content li::marker {
    color: var(--lufs-teal);
}

/* Emphasis */
.manual-content strong {
    color: var(--lufs-yellow);
    font-weight: 600;
}

.manual-content em {
    color: var(--lufs-teal);
    font-style: italic;
}

/* Code */
.manual-content code {
    background: var(--lufs-teal);
    color: var(--lufs-black);
    padding: 2px 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    border: 1px solid var(--lufs-white);
}

.manual-content pre {
    background: var(--lufs-black);
    border: 2px solid var(--lufs-teal);
    padding: var(--spacing-lg);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--lufs-teal);
}

.manual-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--lufs-white);
}

/* Blockquotes */
.manual-content blockquote {
    border-left: 4px solid var(--lufs-yellow);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    font-style: italic;
    color: var(--lufs-teal);
    background: rgba(231, 178, 37, 0.05);
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Links */
.manual-content a {
    color: var(--lufs-teal);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.manual-content a:hover {
    color: var(--lufs-yellow);
}

/* Retro Buttons Section */
.retro-buttons {
    margin: var(--spacing-xl) 0;
    text-align: center;
    padding: var(--spacing-lg);
    border: 2px solid var(--lufs-teal);
    background: var(--lufs-black);
}

.buttons-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Retro Button Styling */
.webring-button {
    width: 88px;
    height: 31px;
    display: inline-block;
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    background: var(--retro-light-gray);
    border: 2px solid var(--retro-border);
    box-shadow: var(--shadow-flat);
    margin: var(--spacing-sm);
    padding: 0;
    transition: all 0.2s ease;
    position: relative;
    image-rendering: pixelated;
}

.webring-button:hover {
    background: var(--retro-gray);
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--retro-border);
}

.webring-button svg {
    width: 88px;
    height: 31px;
    display: block;
    margin: 0 auto;
    background: var(--retro-light-gray);
}

/* Sparkle effects for retro buttons */
.sparkle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--lufs-white);
    z-index: 10;
    animation: sparkle 2s infinite;
    pointer-events: none;
}

.lufs-button .sparkle:nth-child(1) {
    top: 8px;
    left: 20px;
    animation-delay: 0s;
}

.lufs-button .sparkle:nth-child(2) {
    top: 15px;
    left: 60px;
    animation-delay: 0.7s;
}

.lufs-button .sparkle:nth-child(3) {
    top: 22px;
    left: 35px;
    animation-delay: 1.4s;
}

.dr-button .sparkle:nth-child(1) {
    top: 6px;
    left: 15px;
    animation-delay: 0.3s;
}

.dr-button .sparkle:nth-child(2) {
    top: 18px;
    left: 70px;
    animation-delay: 1s;
}

.dr-button .sparkle:nth-child(3) {
    top: 25px;
    left: 45px;
    animation-delay: 1.7s;
}

@keyframes sparkle {
    0%, 100% { 
        opacity: 0; 
        transform: scale(0.5);
    }
    50% { 
        opacity: 1; 
        transform: scale(1);
    }
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 2px solid var(--lufs-teal);
    margin-top: var(--spacing-xl);
}

.footer p {
    color: var(--lufs-teal);
    font-size: 0.9rem;
    font-family: var(--font-body);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .manual-content {
        padding: var(--spacing-lg);
    }
    
    .manual-content table {
        font-size: 0.9rem;
    }
    
    .manual-content th,
    .manual-content td {
        padding: var(--spacing-sm);
    }
    
    .header-text h1 {
        font-size: 2rem;
    }
    
    .logo {
        width: 60px;
        height: 60px;
    }
    
    .buttons-container {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .manual-content {
        padding: var(--spacing-md);
    }
    
    .header-text h1 {
        font-size: 1.8rem;
    }
    
    .logo {
        width: 50px;
        height: 50px;
    }
    
    .sticky-header .logo {
        width: 30px;
        height: 30px;
    }
    
    .sticky-header .header-text h1 {
        font-size: 14px;
    }
    
    .sticky-header .header-text p {
        font-size: 10px;
    }
}

::selection {
    background-color: var(--lufs-yellow);
    color: var(--lufs-black);
}

::-moz-selection {
    background-color: var(--lufs-yellow);
    color: var(--lufs-black);
}