/* CSS Variables for Future Scalability */
:root {
    /* Primary Colors */
    --primary-color: #283c4f;
    --secondary-color: #e94a39;
    --accent-color: #6e5494;

    /* Background Colors */
    --background-light: #f4f4f9;
    --background-section: #ffffff;
    --background-disclaimer: #fdf2f2;
    --background-dark: #0d1117;
    --background-dark-section: #1a1a1a;
    --background-dark-disclaimer: #1e1e1e;

    /* Text Colors */
    --text-primary: #283c4f;
    --text-secondary: #24292e;
    --text-light: #c9d1d9;
    --text-muted: #555;
    --text-dark-mode: #d1d1d1;
    --text-disclaimer: #777;
    --text-disclaimer-hover: #555;

    /* Element Colors */
    --cta-button-bg: var(--secondary-color);
    --cta-button-hover-bg: #d43d2a;
    --cta-button-dark-hover-bg: #2ea043;
    --disclaimer-border: var(--secondary-color);
    --disclaimer-hover-bg: #fde0e0;
    --footer-bg: var(--primary-color);
    --footer-text: #ffffff;

    /* Icon Colors */
    --icon-color: var(--secondary-color);
    --icon-hover-color: #e94a39;

    /* Tooltip Colors */
    --tooltip-bg: #24292e;
    --tooltip-text: #ffffff;

    /* Shadows */
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-dark: rgba(255, 255, 255, 0.05);
}

/* Dark Mode Overrides */
body.dark-mode {
    --background-light: #0d1117;
    --background-section: #0d1117;
    --background-disclaimer: #1e1e1e;
    --text-primary: #c9d1d9;
    --text-secondary: #c9d1d9;
    --cta-button-bg: var(--secondary-color);
    --cta-button-hover-bg: #2ea043;
    --disclaimer-border: var(--secondary-color);
    --disclaimer-hover-bg: #444;
    --footer-bg: #0d1117;
    --footer-text: #ffffff;
    --tooltip-bg: #24292e;
    --tooltip-text: #ffffff;
    --shadow-light: rgba(255, 255, 255, 0.05);
}

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

html {
    font-size: 16px; /* Base font size for rem calculations */
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: var(--background-light);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

/* Dark Mode */
body.dark-mode {
    background-color: var(--background-light); 
    color: var(--text-light); 
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: 12px;
    right: 20px;
    z-index: 1000;
}

.dark-mode-toggle input[type="checkbox"] {
    height: 0;
    width: 0;
    visibility: hidden;
}

.dark-mode-toggle label {
    cursor: pointer;
    text-indent: -9999px;
    width: 50px;
    height: 25px;
    background: grey;
    display: block;
    border-radius: 100px;
    position: relative;
}

.dark-mode-toggle label::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 21px;
    height: 21px;
    background: #fff;
    border-radius: 90px;
    transition: 0.3s;
}

.dark-mode-toggle input:checked + label {
    background: var(--accent-color);
}

.dark-mode-toggle input:checked + label::after {
    left: calc(100% - 2px);
    transform: translateX(-100%);
}

.dark-mode-toggle label:active::after {
    width: 28px;
}

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 999;
    box-shadow: 0 2px 4px var(--shadow-light);
    transition: background-color 0.3s;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar .logo {
    max-width: 200px;
    transition: transform 0.3s;
}

.navbar .logo:hover {
    transform: scale(1.05);
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    font-size: 1rem;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--secondary-color);
    outline: none; /* Remove default focus outline */
}

/* Focus States for Accessibility */
.nav-links a:focus,
.cta-button:focus,
.menu-toggle:focus,
footer .social-media a:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 4px;
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: #ffffff;
    cursor: pointer;
    background: none;
    border: none;
}

.menu-toggle:focus {
    outline: none;
}

@media screen and (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        flex-direction: column;
        width: 100%;
        display: none;
    }

    .nav-links li {
        margin: 10px 0;
    }

    .nav-links.active {
        display: flex;
    }
}

/* Section Titles */
.section-title {
    text-align: center;
    font-size: clamp(1.5rem, 2vw, 2.5rem);
    color: var(--text-secondary);
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    display: block;
    margin: 10px auto 0 auto;
    border-radius: 2px;
}

/* Subsection Titles Styling */
.subsection-title {
    font-size: 1.75rem;
    margin-top: 40px;
    margin-bottom: 20px;
    color: var(--text-secondary);
    text-align: center;
    position: relative;
}

/* Decorative Underline for Subsection Titles */
.subsection-title::after {
    content: '';
    width: 48px;
    height: 4px;
    background-color: var(--secondary-color);
    display: block;
    margin: 8px auto 0 auto;
    border-radius: 2px;
}

/* Hero/Intro Section */
.intro {
    text-align: center;
    padding: 120px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1a2733 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 200%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-50%);
    z-index: 1;
}

.intro .container {
    position: relative;
    z-index: 2;
}

.intro h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 20px;
    animation: fadeInDown 1s ease-out;
}

.intro p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease-out 0.5s;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--cta-button-bg);
    color: #ffffff;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 50px;
    transition: background-color 0.3s, transform 0.3s;
    border: none;
}

.cta-button i {
    margin-right: 10px;
}

.cta-button:hover,
.cta-button:focus {
    background-color: var(--cta-button-hover-bg);
    transform: translateY(-3px);
}

/* Features Section */
.features {
    background-color: var(--background-section);
    padding: 80px 20px;
    transition: background-color 0.3s;
}

.features ul {
    max-width: 1000px;
    margin: 0 auto;
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.features ul li {
    background-color: #ffffff;
    padding: 30px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    align-items: center;
}

.features ul li i {
    font-size: 2rem;
    color: var(--secondary-color); 
    margin-right: 20px;
}

.features ul li:hover,
.features ul li:focus-within {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-light);
}

/* How It Works Section */
.how-it-works {
    padding: 80px 20px;
    background-color: var(--background-section);
    animation: fadeInUp 1s ease-out;
    transition: background-color 0.3s;
}

.how-it-works p {
    max-width: 800px;
    margin: 0 auto 30px auto;
    font-size: 1.1rem;
    text-align: center;
    color: var(--text-secondary); 
}

.directory-tree {
    background-color: var(--background-section); 
    border-left: 4px solid var(--secondary-color); 
    padding: 20px;
    margin: 20px auto;
    max-width: 800px;
    overflow-x: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-light);
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    line-height: 1.5;
    position: relative;
    transition: transform 0.3s, background-color 0.3s, border-left 0.3s;
}

.directory-tree:hover,
.directory-tree:focus-within {
    transform: scale(1.02);
}

.directory-tree .parent {
    color: var(--secondary-color);
    font-weight: bold;
}

.directory-tree .child {
    color: var(--text-secondary); 
    margin-left: 20px;
}

.directory-tree .grandchild {
    color: #586069; 
    margin-left: 40px;
}

/* Tooltip Styling */
.directory-tree span[data-tooltip] {
    position: relative;
}

.directory-tree span[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: 100%;
    transform: translateX(-50%);
    background-color: var(--tooltip-bg);
    color: var(--tooltip-text);
    padding: 5px 10px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 10;
    font-size: 0.9rem;
}

.directory-tree span[data-tooltip]:hover::after,
.directory-tree span[data-tooltip]:focus::after {
    opacity: 1;
    visibility: visible;
}

/* Code Block Styling */
.code-block {
    background-color: #1e1e1e;
    color: #dcdcdc;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 20px auto;
    max-width: 800px;
    box-shadow: 0 2px 8px var(--shadow-light);
}

/* Roadmap Timeline Styles */
.timeline {
    position: relative;
    margin: 50px 0;
    padding: 0 20px;
    overflow: hidden;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--secondary-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 45%;
    padding: 20px;
    box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 55%;
}

.timeline-item .timeline-icon {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--secondary-color);
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.timeline-item:nth-child(even) .timeline-icon {
    left: -30px;
    right: auto;
}

.timeline-item .timeline-content {
    background: var(--background-section);
    padding: 20px;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 2px 8px var(--shadow-light);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    right: -15px;
    border-width: 8px 0 8px 15px;
    border-style: solid;
    border-color: transparent transparent transparent var(--background-section);
    z-index: 0;
}

.timeline-item:nth-child(even) .timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    left: -15px;
    border-width: 8px 15px 8px 0;
    border-style: solid;
    border-color: transparent var(--background-section) transparent transparent;
    z-index: 0;
}

.timeline-item .timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.timeline-item .timeline-content p {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.timeline-item .timeline-content ul {
    list-style: disc;
    padding-left: 20px;
}

.timeline-item .timeline-content ul li {
    margin-bottom: 5px;
    color: var(--text-secondary);
}

@media screen and (max-width: 768px) {
    .timeline:before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 50px;
        padding-right: 25px;
        margin-bottom: 30px;
    }

    .timeline-item .timeline-icon {
        top: auto;
        left: 0;
        right: auto;
    }

    .timeline-item:nth-child(even) .timeline-icon {
        left: 0;
    }

    .timeline-item .timeline-content {
        padding-left: 70px;
    }

    .timeline-item .timeline-content::before {
        left: 45px;
        border-width: 8px 8px 8px 0;
        border-color: transparent var(--background-section) transparent transparent;
    }

    /* Adjust footer icons size for smaller screens */
    footer .social-media a i.fab.fa-github,
    footer .social-media a svg.nostr-icon {
        width: 20px;
        height: 20px;
    }
}

/* Dark Mode for Roadmap Timeline */
body.dark-mode .timeline:before {
    background: var(--secondary-color);
}

body.dark-mode .timeline-item .timeline-content {
    background: var(--background-dark-section);
}

body.dark-mode .timeline-item:nth-child(odd) .timeline-content::before {
    border-color: transparent transparent transparent var(--background-dark-section);
}

body.dark-mode .timeline-item:nth-child(even) .timeline-content::before {
    border-color: transparent var(--background-dark-section) transparent transparent;
}

body.dark-mode .timeline-item .timeline-content {
    color: var(--text-light);
}

body.dark-mode .timeline-item .timeline-icon {
    background: var(--secondary-color);
    color: #fff;
}

/* Disclaimer Section */
.disclaimer {
    padding: 60px 0;
    background-color: var(--background-disclaimer); 
    transition: background-color 0.3s ease;
}

.disclaimer .container {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.disclaimer h2 {
    color: var(--secondary-color);
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 700;
}

.disclaimer p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 20px;
    text-align: center;
}

.disclaimer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.disclaimer ul li {
    display: flex;
    align-items: flex-start;
    padding: 20px;
    border-left: 4px solid var(--disclaimer-border);
    background-color: var(--background-disclaimer);
    border-radius: 8px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.disclaimer ul li:hover,
.disclaimer ul li:focus-within {
    background-color: var(--disclaimer-hover-bg); 
}

.disclaimer ul li i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-right: 15px;
    margin-top: 5px;
}

.disclaimer ul li strong {
    font-weight: 600;
    color: #333;
    margin-right: 5px;
}

.disclaimer ul li span {
    color: var(--text-muted);
    line-height: 1.6;
}

.disclaimer ul li:hover span,
.disclaimer ul li:focus-within span {
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--footer-bg); 
    padding: 30px 20px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--footer-text);
    transition: background-color 0.3s, color 0.3s;
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

footer .social-media {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 15px;
}

footer .social-media a {
    color: var(--footer-text);
    margin: 0 10px;
    font-size: 1.2rem;
    transition: color 0.3s, transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none; 
}

footer .social-media a:hover,
footer .social-media a:focus {
    color: var(--secondary-color); 
    transform: scale(1.1);
}

footer .social-media a:focus {
    outline: none;
}

/* Custom Nostr Icon Styling */
.nostr-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
    transition: fill 0.3s, transform 0.3s;
    display: inline-block;
    vertical-align: middle;
}

.nostr-icon:focus {
    outline: none;
}

/* GitHub Icon Styling */
.social-media a i.fab.fa-github {
    font-size: 1.5rem;
    transition: color 0.3s, transform 0.3s;
    width: 24px;
    height: 24px;
}

/* Ensure both icons align vertically */
.social-media a,
.social-media a img,
.social-media a i,
.social-media a svg.nostr-icon {
    vertical-align: middle;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media screen and (max-width: 992px) {
    .features ul {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .navbar .container {
        flex-direction: row;
        align-items: center;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .features ul {
        grid-template-columns: 1fr;
    }

    .directory-tree {
        padding: 15px;
        font-size: 0.9rem;
    }

    .dark-mode-toggle {
        top: 10px;
        right: 10px;
    }

    /* Adjust disclaimer container padding on smaller screens */
    .disclaimer .container {
        padding: 40px 15px;
    }

    /* Adjust footer icons size for smaller screens */
    footer .social-media a i.fab.fa-github,
    footer .social-media a svg.nostr-icon {
        width: 20px;
        height: 20px;
    }

    /* Roadmap Padding Adjustment for Mobile */
    .timeline {
        padding: 0 10px;
    }

    .timeline-item .timeline-content {
        padding-left: 60px;
    }
}

/* Dark Mode Styling */
body.dark-mode .navbar {
    background-color: var(--background-dark);
}

body.dark-mode .intro {
    background: linear-gradient(135deg, var(--background-dark) 0%, #161b22 100%); 
}

body.dark-mode .intro p,
body.dark-mode .how-it-works p,
body.dark-mode .features .section-title,
body.dark-mode .features ul li,
body.dark-mode .disclaimer p {
    color: var(--text-light); 
}

body.dark-mode .cta-button {
    background-color: var(--cta-button-bg); 
    color: #ffffff;
}

body.dark-mode .cta-button:hover,
body.dark-mode .cta-button:focus {
    background-color: var(--cta-button-hover-bg); 
    color: #ffffff;
}

body.dark-mode .features {
    background-color: var(--background-dark);
}

body.dark-mode .features .section-title {
    color: var(--text-light);
}

body.dark-mode .features ul li {
    background-color: var(--background-dark-section); 
    box-shadow: 0 4px 12px var(--shadow-dark);
}

body.dark-mode .how-it-works {
    background-color: var(--background-dark);
}

body.dark-mode .how-it-works .section-title {
    color: var(--text-light);
}

body.dark-mode .directory-tree {
    background-color: var(--background-dark-section); 
    border-left: 4px solid var(--secondary-color); 
}

body.dark-mode .directory-tree span.parent {
    color: #ff8779; 
}

body.dark-mode .directory-tree span.child {
    color: var(--text-light); 
}

body.dark-mode .directory-tree span.grandchild {
    color: #ff8779; 
}

body.dark-mode .code-block {
    background-color: #2d2d2d;
    color: #dcdcdc;
    box-shadow: 0 2px 8px var(--shadow-dark);
}

body.dark-mode .disclaimer .container {
    background-color: #2c2f33; 
    color: var(--footer-text);
    border-left: 5px solid var(--disclaimer-border);
}

body.dark-mode .disclaimer ul li {
    background-color: var(--background-dark-disclaimer);
}

body.dark-mode .disclaimer ul li:hover,
body.dark-mode .disclaimer ul li:focus-within {
    background-color: var(--disclaimer-hover-bg);
}

body.dark-mode footer {
    background-color: var(--background-dark);
}