/* ===== Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 sans-serif;
    line-height: 1.5;
}

body {
    margin: 0;
    background-color: #020617;
    color: #e5e7eb;
}

/* Links */
a {
    color: #f97316;
    text-decoration: none;
}
a:hover,
a:focus-visible {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== Header & Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #111827;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.5rem;
    gap: 1rem;
}

.logo {
    font-weight: 600;
    font-size: 1.15rem;
    color: #f97316;
}

/* Nav */
.main-nav {
    display: flex;
    gap: 0.7rem;
    align-items: center;
    flex-wrap: wrap;
}

.main-nav a {
    color: #e5e7eb;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.9rem;
}

.main-nav a[aria-current="page"] {
    background-color: #f97316;
    color: #020617;
}

/* Top links bar */
.top-links-bar {
    background: radial-gradient(circle at top left, #1f2937, #020617);
    border-top: 1px solid #111827;
    border-bottom: 1px solid #111827;
}

.top-links-inner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0;
    flex-wrap: wrap;
}

.top-links-label {
    font-size: 0.85rem;
    color: #9ca3af;
    white-space: nowrap;
}

.top-links-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.top-link-btn {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    min-width: 130px;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    text-decoration: none;
    color: #f9fafb;
    background: #111827;
    border: 1px solid transparent;
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.8);
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
    font-size: 0.78rem;
    line-height: 1.2;
}

.top-link-main {
    font-weight: 600;
    font-size: 0.85rem;
}

.top-link-sub {
    opacity: 0.8;
}

/* Brand colors */
.top-link-btn.github {
    background: linear-gradient(135deg, #111827, #020617);
}

.top-link-btn.youtube {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
}

.top-link-btn.kofi {
    background: linear-gradient(135deg, #0ea5e9, #0369a1);
}

.top-link-btn:hover,
.top-link-btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

/* ===== Main content ===== */
.site-main {
    padding: 2.5rem 0 3rem;
}

/* Hero */
.hero .eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #f97316;
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
}

.hero h1 {
    font-size: clamp(2.1rem, 5vw, 3.1rem);
    margin: 0 0 0.6rem;
}

.hero .lead {
    max-width: 32rem;
    color: #9ca3af;
    margin: 0 0 1.5rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.hero-meta-item {
    border-radius: 0.75rem;
    padding: 0.6rem 0.8rem;
    border: 1px solid #111827;
    background: radial-gradient(circle at top left, #1f2937, #020617);
}

.hero-meta-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #9ca3af;
    margin-bottom: 0.2rem;
}

.hero-meta-value {
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.55rem 1.2rem;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.95rem;
    border: 1px solid transparent;
}

.btn.primary {
    background: linear-gradient(135deg, #f97316, #fb923c);
    color: #111827;
}

.btn.ghost {
    border-color: #4b5563;
    color: #e5e7eb;
}

/* Sections */
.section {
    padding: 2.2rem 0;
}

.section-alt {
    background: #020617;
    border-top: 1px solid #111827;
    border-bottom: 1px solid #111827;
}

.section-header h2 {
    margin: 0 0 0.4rem;
    font-size: 1.4rem;
}

.section-header p {
    margin: 0;
    color: #9ca3af;
}

.section-footer {
    margin-top: 1rem;
}

/* Grids & cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
    margin-top: 1.3rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 1rem;
}

.card {
    padding: 1.1rem 1.1rem 1.3rem;
    border-radius: 0.9rem;
    background: radial-gradient(circle at top left, #1f2937, #020617);
    border: 1px solid #111827;
}

.card.compact {
    padding: 0.9rem 1rem 1rem;
}

.card h2,
.card h3 {
    margin: 0 0 0.4rem;
    font-size: 1.05rem;
}

.card p {
    margin: 0 0 0.5rem;
    color: #9ca3af;
}

.card-note {
    font-size: 0.85rem;
    color: #9ca3af;
}

.card-link {
    font-size: 0.9rem;
    color: #f97316;
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr);
    gap: 1.5rem;
    margin-top: 1.2rem;
}

.feature-main ul {
    padding-left: 1.1rem;
    margin: 0.5rem 0 1rem;
    color: #d1d5db;
    font-size: 0.93rem;
}

.feature-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.feature-aside {
    border-radius: 0.9rem;
    padding: 1rem 1.1rem;
    border: 1px solid #111827;
    background: #020617;
    font-size: 0.92rem;
}

/* Two-column layout */
.two-col {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.3fr);
    gap: 1.5rem;
}

.about-preview h2 {
    margin-top: 0;
}

/* Page header */
.page-header h1 {
    margin: 0 0 0.4rem;
    font-size: 1.7rem;
}

.page-header p {
    margin: 0;
    color: #9ca3af;
}

/* Posts list */
.posts-list {
    display: grid;
    gap: 1rem;
    margin-top: 1.2rem;
}

.post-teaser {
    border-radius: 0.9rem;
    border: 1px solid #111827;
    padding: 0.9rem 1rem 1rem;
    background: #020617;
}

.post-teaser h3 {
    margin: 0.4rem 0 0.4rem;
    font-size: 1.05rem;
}

.post-teaser p {
    margin: 0;
    color: #9ca3af;
}

.post-meta {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.8rem;
    color: #9ca3af;
}

.post-tag {
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    background: #111827;
    color: #f97316;
}

/* Blog nav */
.blog-nav {
    margin: 1rem 0 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.blog-nav a {
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    border: 1px solid #374151;
}

/* Text utilities */
.text-link {
    color: #f97316;
    font-weight: 500;
}

/* Footer */
.site-footer {
    border-top: 1px solid #111827;
    padding: 1.2rem 0 1.8rem;
    font-size: 0.85rem;
    color: #6b7280;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: #9ca3af;
    font-size: 0.85rem;
}

/* IPv4 overlay banner */
.ipv4-banner.hidden {
    display: none;
}

.ipv4-banner {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.98), rgba(0, 0, 0, 0.98));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.ipv4-banner-inner {
    max-width: 520px;
    width: 100%;
    background: #020617;
    border-radius: 1rem;
    border: 1px solid #f97316;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.75);
    padding: 1.6rem 1.6rem 1.4rem;
}

.ipv4-banner h2 {
    margin: 0 0 0.75rem;
    font-size: 1.3rem;
    color: #f97316;
}

.ipv4-banner p {
    margin: 0 0 0.6rem;
    color: #e5e7eb;
}

.ipv4-banner-list {
    margin: 0 0 0.6rem 1.1rem;
    padding: 0;
    color: #d1d5db;
    font-size: 0.93rem;
}

.ipv4-banner-list li {
    margin-bottom: 0.25rem;
}

.ipv4-banner-more {
    font-size: 0.85rem;
    color: #9ca3af;
    margin-bottom: 0.9rem;
}

.ipv4-banner-more a {
    color: #f97316;
}

.btn.ipv4-banner-close {
    background: linear-gradient(135deg, #f97316, #fb923c);
    color: #111827;
    border-radius: 999px;
    padding: 0.55rem 1.3rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.4rem 0.5rem;
    }

    .top-links-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .top-links-buttons {
        width: 100%;
        justify-content: flex-start;
    }

    .top-link-btn {
        flex: 1 1 auto;
    }

    .feature-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .two-col {
        grid-template-columns: minmax(0, 1fr);
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .ipv4-banner-inner {
        padding: 1.2rem 1rem 1.1rem;
    }

    .ipv4-banner h2 {
        font-size: 1.1rem;
    }
}

/* Additions for long technical articles and keyboard-only navigation. */
html{scroll-padding-top:10rem}
.skip{position:absolute;left:1rem;top:-10rem;background:#020617;padding:.6rem;z-index:10000}.skip:focus{top:1rem}
a:focus-visible,[tabindex]:focus-visible{outline:2px solid #fb923c;outline-offset:4px}
.prose{max-width:820px;line-height:1.65}.prose section{margin-top:2.5rem}
.page-heading h1{font-size:1.7rem;margin:0 0 .4rem}.page-heading p,.meta{color:#9ca3af}.page-heading{margin-bottom:2rem}
.note,.contents{padding:1rem 1.2rem;border:1px solid #374151;border-left:3px solid #f97316;border-radius:.6rem;background:#0f172a;margin:1.5rem 0}
.contents ol{padding-left:1.3rem}.prose li+li{margin-top:.4rem}
code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow:auto;padding:1rem;background:#020617;border:1px solid #374151;border-radius:.6rem;font-size:.85rem;line-height:1.5}
pre code{white-space:pre;overflow-wrap:normal}
.table-wrap{max-width:100%;overflow:auto;margin:1.5rem 0}table{border-collapse:collapse;width:100%;font-size:.9rem}th,td{text-align:left;vertical-align:top;padding:.65rem .5rem;border-bottom:1px solid #374151}td code{white-space:nowrap}
.post-list,.link-list{list-style:none;padding:0}.post-list>li,.link-list>li{padding:1rem 0;border-bottom:1px solid #111827}.link-list strong{display:block}.link-list li{margin:0}.post-list h2{font-size:1.3rem}
.footer-note{margin:.7rem 0 0}.site-main>.grid{margin-bottom:2rem}
.ipv4-dismiss{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.ipv4-dismiss:checked+.ipv4-banner{display:none}.ipv4-dismiss:focus-visible+.ipv4-banner .ipv4-banner-close{outline:2px solid white;outline-offset:4px}
.ipv4-banner{overflow:auto}.ipv4-banner-close{display:inline-block}.ipv4-banner-inner{max-height:90vh;overflow:auto}
@media(max-width:640px){html{scroll-padding-top:16rem}.main-nav{gap:.3rem}.main-nav a{padding:.3rem .55rem}.grid,.grid-3{grid-template-columns:minmax(0,1fr)}.prose .page-heading h1{font-size:1.7rem}.top-link-btn{min-width:85px}.top-links-inner{gap:.4rem}}
@media(prefers-reduced-motion:reduce){.top-link-btn{transition:none}.top-link-btn:hover{transform:none}}
@media print{.site-header,.site-footer,.ipv4-banner,.ipv4-dismiss,.skip{display:none}body{background:white;color:black}.prose{max-width:none}.site-main{padding:0}a{color:inherit}pre{white-space:pre-wrap}pre code{white-space:pre-wrap}.table-wrap{overflow:visible}h2,h3{break-after:avoid}}

/* Keep the original container gutters on combined layout classes. */
.site-main.container,.top-links-inner{padding-left:1rem;padding-right:1rem}

/* One-row navigation, with native horizontal scrolling on narrow screens. */
.header-inner{padding:.5rem 1rem;gap:1rem;min-height:60px;flex-direction:row;align-items:center}
.logo{flex:none;white-space:nowrap}
.header-navigation{display:flex;align-items:center;gap:1rem;min-width:0}
.social-links{display:flex;gap:.4rem;align-items:center;flex:none}
.social-links .top-link-btn{width:40px;height:40px;min-width:40px;flex:none;padding:8px;align-items:center}
.social-links svg{display:block;flex:none}
html{scroll-padding-top:5rem}
@media(max-width:800px){
.header-inner{gap:.6rem;padding:.3rem .75rem;min-height:56px}
.logo{font-size:1rem}
.header-navigation{overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:#374151 transparent;padding:4px;gap:.6rem}
.main-nav{flex:none;flex-wrap:nowrap;gap:.1rem}
.main-nav a{display:flex;align-items:center;white-space:nowrap;padding:.5rem .55rem;min-height:40px;font-size:.85rem}
.social-links .top-link-btn{width:40px;height:40px}
html{scroll-padding-top:4.5rem}
}
.section.container{padding-left:1rem;padding-right:1rem}

/* Projects and writing share the first content area. */
.home-intro .lead{max-width:44rem}
.home-intro .hero-actions{margin-bottom:0}
.home-work{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr);gap:2rem;margin-top:2rem;align-items:start}
.home-projects{grid-column:1;grid-row:1}.home-blog{grid-column:2;grid-row:1}
.home-project-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;margin-top:1rem}
.home-work .card{padding:1rem;display:flex;flex-direction:column;align-items:flex-start}
.home-work .card h3 a{color:#e5e7eb}.home-work .card h3 a:hover{color:#f97316}
.home-work .card p{font-size:.9rem}.home-work .card .project-status{font-size:.72rem;color:#fb923c;letter-spacing:.02em;margin-bottom:.5rem}
.home-work .card .card-link{margin-top:auto;padding-top:.5rem}
.latest-post{margin-top:1rem}.latest-post h3{font-size:1.25rem;line-height:1.4}
.home-work .latest-post .eyebrow{font-size:.75rem;color:#fb923c}.home-work .latest-post .meta{font-size:.75rem;margin-bottom:.8rem}
.home-section-links{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;font-size:.9rem;margin-top:1rem}
.home-values{border-top:1px solid #1f2937;margin-top:1.8rem}.home-values h2{font-size:1.4rem;margin:0 0 .75rem}.home-values>p{max-width:46rem;color:#9ca3af}
@media(max-width:700px){.home-work{grid-template-columns:minmax(0,1fr);gap:1.5rem}.home-blog,.home-projects{grid-column:auto;grid-row:auto}.home-project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-values{margin-top:1rem}}
@media(max-width:440px){.home-project-grid{grid-template-columns:minmax(0,1fr)}}