:root {
    --bg-main: #2E3440;
    --bg-container: #3B4252;
    --border-color: #4C566A;
    --text-primary: #ECEFF4;
    --text-secondary: #D8DEE9;
    --text-quote: #A3BADC;
    --accent-blue: #81A1C1;
    --accent-blue-bright: #88C0D0;
    
    --dither-color-1: rgba(46, 52, 64, 0.95);
    --dither-color-2: rgba(59, 66, 82, 0.9);
    --dither-size: 2px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    padding: 2rem 1rem;
    overflow-x: hidden;
    background-color: var(--bg-main);
}

.dither-background {
    background: 
        repeating-conic-gradient(
            from 45deg, 
            var(--dither-color-1) 0% 25%, 
            var(--dither-color-2) 0% 50%
        ) 
        0 0 / var(--dither-size) var(--dither-size);
    filter: contrast(1.1);
    background-attachment: fixed;
}

/* Header & buttons */
.site-header {
    background: var(--bg-container);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1rem;
}
.header-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.site-title {
    font-family: 'Roboto Mono', monospace;
    color: var(--text-primary);
    margin: 0;
}
.header-actions {
    display: flex; gap: 0.5rem; align-items: center;
}
.btn {
    background: var(--accent-blue-bright);
    color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    text-decoration: none;
    display: inline-block;
}
.btn:hover {
    opacity: 0.9;
}
.btn-primary {
    background: var(--accent-blue);
    color: var(--bg-main);
}

/* Container & content */
.readme-container {
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--bg-container);
    border: 2px solid var(--border-color);
    border-radius: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    position: relative;
}
.readme-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB2aWR0aD0iNCIgaGVpZ2h0PSI0IiB2aWV3Qm94PSIwIDAgNCA0IiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxnIGZpbGw9IiM5ZTRiNWUiIGZpbGwtb3BhY2l0eT0[...]');
    background-size: 3px 3px;
    opacity: 0.1;
    pointer-events: none;
    z-index: 1;
}
.readme-content {
    padding: 2rem 3rem;
    position: relative;
    z-index: 2;
}
@media (max-width: 768px) {
    .readme-content { padding: 1.5rem; }
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Roboto Mono', monospace;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.4em;
    border-bottom: 2px solid var(--border-color);
}
h2 {
    font-family: 'Press Start 2P', cursive;
    font-size: 1.25rem;
    text-transform: uppercase;
    color: var(--accent-blue-bright);
}
h3 { font-size: 1.4rem; border-bottom: none; }
h3 img { vertical-align: middle; }

p { margin-bottom: 1rem; }
strong { color: var(--accent-blue-bright); }

/* Lists & badges */
ul { list-style-type: none; padding-left: 1.5rem; margin-bottom: 1rem; }
li { position: relative; padding-left: 1.5rem; margin-bottom: 0.5rem; }
li::before { position: absolute; left: 0; top: 0; color: var(--accent-blue-bright); font-size: 1.2em; }
ul li:nth-child(1)::before { content: '🌱'; }
ul li:nth-child(2)::before { content: '🛠️'; }
ul li:nth-child(3)::before { content: '📫'; }
ul li:nth-child(4)::before { content: '☕'; }

blockquote {
    font-family: 'Roboto Mono', monospace;
    border-left: 4px solid var(--accent-blue);
    padding: 0.5rem 1rem;
    margin: 1.5rem 0;
    background-color: var(--bg-main);
    color: var(--text-quote);
    font-style: italic;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

hr {
    height: 1px;
    background-color: var(--border-color);
    border: 0;
    margin: 2.5rem 0;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.3s ease, transform 0.2s ease;
}
a:hover { color: var(--accent-blue-bright); text-decoration: underline; }

.badges-container {
    text-align: center;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}
.badges-container img {
    margin: 0.25rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border-radius: 4px;
}
.badges-container a:hover img {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.platform-badge { height: 40px; }

.certificate-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
}
.cert-link {
    display: inline-block;
    background-color: var(--bg-main);
    color: var(--text-secondary);
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.2s ease;
}
.cert-link:hover {
    background-color: var(--accent-blue);
    color: var(--bg-main);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    text-decoration: none;
}

/* Animations */
.fade-in-section { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-in-section.is-visible { opacity: 1; transform: translateY(0); }