/* Nebula Theme Design System */
:root {
    /* Palette */
    --bg-deep: #050507;
    --bg-card: rgba(22, 27, 34, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.05);

    --text-main: #e6edf3;
    --text-muted: #8b949e;

    --accent-cyan: #00f2ff;
    --accent-purple: #bc13fe;
    --accent-glow: rgba(0, 242, 255, 0.5);

    --border-glass: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

/* Reset & Base */
* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.7;
    margin: 0;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(188, 19, 254, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(0, 242, 255, 0.08) 0%, transparent 25%);
    background-attachment: fixed;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    color: #fff;
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

h2 {
    font-size: 2.2rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--accent-cyan);
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

a:hover {
    color: var(--accent-purple);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Layout */
.wrapper {
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 5, 7, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
    padding: var(--space-sm) 0;
}

.site-header .wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff !important;
    letter-spacing: -0.5px;
}

.site-nav a {
    margin-left: var(--space-md);
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
}

.site-nav a:hover {
    color: var(--accent-cyan);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-lg) 0;
    position: relative;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Search Bar */
.search-container {
    margin: var(--space-md) auto;
    max-width: 500px;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.3s ease;
}

#search-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
}

/* Post Grid */
.post-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
    list-style: none;
    padding: 0;
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    border-color: var(--accent-cyan);
}

.post-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.post-card h3 {
    margin-top: 0;
    font-size: 1.4rem;
    line-height: 1.4;
}

.post-card h3 a {
    color: #fff;
}

.post-card h3 a:hover {
    color: var(--accent-cyan);
}

.post-excerpt {
    font-size: 0.95rem;
    color: var(--text-muted);
    flex-grow: 1;
}

/* Post Content */
.post-layout {
    display: grid;
    grid-template-columns: 1fr 250px;
    /* Fixed sidebar width, rest for content */
    gap: var(--space-lg);
    align-items: start;
}

.post-content {
    font-size: 1.1rem;
    background: var(--bg-card);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glass);
    margin-top: var(--space-md);
    min-width: 0;
    /* Prevent overflow */
    overflow-wrap: break-word;
    /* Prevent long words from breaking layout */
}

.post-sidebar {
    position: sticky;
    top: 100px;
    margin-top: var(--space-md);
}

.toc-container {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    display: none;
    /* Hidden by default, shown by JS */
}

.toc-container h3 {
    font-size: 1rem;
    margin-top: 0;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin-bottom: 0.5em;
}

.toc-item a {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: block;
    padding: 2px 0;
}

.toc-item a:hover {
    color: var(--accent-cyan);
    padding-left: 5px;
}

.toc-h3 {
    padding-left: 1em;
}

/* Tags */
.post-tags {
    margin-left: 10px;
}

.tag {
    color: var(--accent-purple);
    background: rgba(188, 19, 254, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8em;
    margin-right: 5px;
}

.post-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

/* Responsive Post */
@media (max-width: 1000px) {
    .post-layout {
        grid-template-columns: 1fr;
    }

    .post-sidebar {
        position: static;
        margin-bottom: var(--space-md);
    }

    .toc-container {
        display: block;
        /* Always show on mobile if content exists */
    }
}

.post-title {
    font-size: 3rem;
    margin-bottom: var(--space-xs);
}

/* Code Blocks */
pre,
code {
    font-family: var(--font-mono);
    background: #0d1117;
    border-radius: 6px;
}

code {
    padding: 0.2em 0.4em;
    color: var(--accent-cyan);
    font-size: 0.9em;
}

pre {
    padding: 1.5rem;
    overflow-x: auto;
    border: 1px solid var(--border-glass);
}

pre code {
    padding: 0;
    color: inherit;
    background: transparent;
}

/* MathJax */
mjx-container[display="true"] {
    overflow-x: auto;
    padding: 1rem 0;
}

mjx-container:not([display="true"]) {
    display: inline !important;
    overflow: visible;
    padding: 0;
    margin: 0;
}

/* Footer */
.site-footer {
    margin-top: var(--space-lg);
    padding: var(--space-md) 0;
    border-top: 1px solid var(--border-glass);
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* Animations */
@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }

    100% {
        transform: translateY(0px);
    }
}

.hero h1 {
    animation: float 6s ease-in-out infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .post-list {
        grid-template-columns: 1fr;
    }

    .post-content {
        padding: var(--space-md);
    }

    h1 {
        font-size: 2.5rem;
    }
}

/* About Page Profile */
.profile-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-width: 700px;
    margin: var(--space-md) auto;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* Ensure image stays within circle */
    border: 3px solid var(--accent-cyan);
    /* Add border */
    box-shadow: 0 0 20px var(--accent-glow);
    background: #000;
    /* Fallback */
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-bio {
    font-size: 1.2rem;
    color: var(--accent-cyan);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.profile-content p {
    font-size: 1.1rem;
    color: var(--text-main);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    /* Increased gap as requested */
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-btn i {
    font-size: 1.2rem;
}

.social-btn.github {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid var(--border-glass);
}

.social-btn.github:hover {
    background: #333;
    border-color: #fff;
    transform: translateY(-3px);
}

.social-btn.linkedin {
    background: rgba(0, 119, 181, 0.2);
    color: #0077b5;
    border: 1px solid rgba(0, 119, 181, 0.3);
}

.social-btn.linkedin:hover {
    background: #0077b5;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 119, 181, 0.4);
}