:root {
    --cover-text-color: #f8fafc;
    --highlight: #7c3aed;
    --highlight-contrast: #ffffff;
    --highlight-inverse: #22d3ee;
    --highlight-inverse-contrast: #0f172a;
    --cover-title-text-shadow: 0 10px 40px rgba(2, 6, 23, 0.55);
    --sticky-menu-text-color: #2563eb;
    --section-light-text-color: #1e293b;
    --section-light-bg-color: #f8fafc;
    --section-dark-text-color: #e2e8f0;
    --section-dark-bg-color: #111827;
    --single-page-text-color: #1e293b;
    --single-page-bg-color: #f8fafc;
    --footer-color-background: #080d1a;
    --footer-color: #cbd5e1;
    --ul-li-icon: fa-check;
}

body {
    font-family: "Open Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

#site-head.withCenteredImage {
    overflow: hidden;
    background-color: #0f172a;
    background-image:
        radial-gradient(circle at 18% 28%, rgba(34, 211, 238, 0.25) 0, transparent 28%),
        radial-gradient(circle at 82% 68%, rgba(124, 58, 237, 0.34) 0, transparent 32%),
        linear-gradient(135deg, #020617 0%, #172554 46%, #312e81 100%);
}

#site-head.withCenteredImage::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.25;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.25) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.25) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 92%);
}

#site-head.withCenteredImage::after {
    content: "";
    position: absolute;
    width: 42vw;
    height: 42vw;
    min-width: 360px;
    min-height: 360px;
    right: -12vw;
    top: -14vw;
    border: 1px solid rgba(165, 180, 252, 0.35);
    border-radius: 50%;
    box-shadow:
        0 0 0 80px rgba(99, 102, 241, 0.04),
        0 0 0 160px rgba(34, 211, 238, 0.025);
    pointer-events: none;
}

#site-head .vertical {
    position: relative;
    z-index: 1;
}

#site-head .blog-title {
    font-size: clamp(5rem, 9vw, 9rem);
    font-weight: 800;
    letter-spacing: 0.08em;
}

#site-head .blog-description {
    max-width: 900px;
    margin: 1.5rem auto 0;
    font-family: "Open Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    font-size: clamp(2.1rem, 3vw, 3.2rem);
    font-weight: 500;
}

#site-head .blog-description b {
    color: #67e8f9;
}

#site-head .blog-description span {
    display: inline-block;
    margin-top: 1rem;
    color: #cbd5e1;
    font-size: 0.58em;
    letter-spacing: 0.12em;
}

#site-head a.btn {
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.28);
    backdrop-filter: blur(8px);
}

.post {
    max-width: 860px;
    padding-top: 7rem;
    padding-bottom: 7rem;
}

.post-title {
    font-weight: 800;
    letter-spacing: 0.03em;
}

.post-content {
    line-height: 1.9;
}

.post-content h3 {
    position: relative;
    margin-top: 2.2em;
    margin-bottom: 0.7em;
    padding-left: 1.2em;
    font-size: 2.4rem;
}

.post-content h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.15em;
    width: 5px;
    height: 1.05em;
    border-radius: 999px;
    background: linear-gradient(180deg, #22d3ee, #7c3aed);
}

.post-content strong {
    color: #2563eb;
}

.post-holder.dark .post-content strong {
    color: #67e8f9;
}

.post-content ol {
    padding-left: 0;
    counter-reset: project-step;
    list-style: none;
}

.post-content ol > li {
    position: relative;
    min-height: 3.2rem;
    margin: 1.3rem 0;
    padding: 0.8rem 0 0.8rem 5.2rem;
    counter-increment: project-step;
}

.post-content ol > li::before {
    content: counter(project-step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0.45rem;
    color: #67e8f9;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.fixed-nav {
    border: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 12px 36px rgba(15, 23, 42, 0.14);
}

.site-footer {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
}

@media (max-width: 700px) {
    #site-head .blog-title {
        font-size: 4.6rem;
    }

    #site-head .blog-description {
        padding: 0 1.5rem;
        font-size: 2.1rem;
    }

    .post {
        width: 84%;
        padding-top: 5rem;
        padding-bottom: 5rem;
    }

    .post-title {
        font-size: 3.3rem;
    }
}