:root {
  --bg: #0f0f10;
  --surface: #171719;
  --surface-hover: #1e1e1e;
  --text: #e7e7e9;
  --muted: #a1a1aa;
  --border: #202025;
  --accent: #a855f7; /* violet */
  --accent-contrast: #0a0a0b;
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --surface: #ffffff;
      --surface-hover: #f5f5f5;
    --text: #0f0f10;
    --muted: #585c63;
    --border: #e6e7eb;
    --accent: #a78bfa; /* violet in light mode */
    --accent-contrast: #f5f3ff;
  }
}

* { box-sizing: border-box; }

html:focus-within { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { display: block; max-width: 100%; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: .5rem .75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .5rem;
  z-index: 1000;
}

.container {
  width: min(1200px, 100% - 1rem);
  margin-inline: auto;
}
.container.narrow { width: min(1100px, 100% - 2rem); }

.section { padding-block: clamp(3rem, 8vw, 0rem); }
.section-title { font-size: clamp(1.25rem, 1.2rem + 1vw, 1.75rem); margin: 0 0 1.25rem; letter-spacing: .1px; }
.lead { font-size: 1.125rem; color: var(--muted); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 0px solid var(--border);
    border-bottom: 1px solid transparent;
  transition: border-bottom-color .2s ease;

}

.site-header.is-scrolled {
    transition: border-bottom-color .4s ease;
  border-bottom-color: var(--border);
}



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

.nav { margin-left: auto; }


.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: .2px;

}
.nav-list { display: flex; gap: 1rem; list-style: none; padding: 0; margin: 0; }
.nav-list a { color: var(--muted); text-decoration: none; padding: .4rem .6rem; border-radius: .4rem; }
.nav-list a:hover { color: var(--text); background: color-mix(in oklab, var(--surface) 70%, transparent); }

.nav-toggle { display: none; background: transparent; border: 1px solid var(--border); color: var(--text); padding: .4rem .6rem; border-radius: .4rem; }

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-list { position: absolute; right: 1rem; top: calc(100% + .5rem); background: var(--surface); border: 1px solid var(--border); border-radius: .6rem; padding: .5rem; display: none; flex-direction: column; min-width: 180px; }
  .nav-list.open { display: flex; }
}

.hero { padding-block: clamp(4rem, 12vw, 10rem) clamp(3rem, 8vw, 6rem); }
.hero-title { font-size: clamp(2rem, 3rem + 2vw, 4rem); line-height: 1.1; margin: 0 0 1rem; letter-spacing: -0.02em; }
.hero-subtitle { color: var(--muted); margin: 0 0 1.25rem; max-width: 60ch; }
.hero-cta { display: flex; gap: 1rem; align-items: center; }

.button { background: var(--text); color: var(--accent-contrast); border: none; padding: .75rem 1rem; border-radius: .6rem; font-weight: 600; text-decoration: none; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-1px); background: color-mix(in oklab, var(--text) 90%, var(--accent)); }
.link { color: var(--accent); text-decoration: none; font-weight: 600; }
.link:hover { text-decoration: underline; }

.work .grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.25rem; }
@media (max-width: 1024px) { .work .grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 640px) { .work .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .9rem;
  padding: 1rem;
  transition: border-color .2s ease, transform .2s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card:hover { border-color: color-mix(in oklab, var(--border), var(--accent)); }
.card h3 { margin: 0 0 .5rem; font-size: 1.1rem; letter-spacing: .1px; }
.card p { margin: 0 0 .75rem; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; padding: 0; margin: 0 0 .75rem; }
.tags li { border: 1px solid var(--border); border-radius: 999px; padding: .25rem .6rem; font-size: .85rem; color: var(--muted); }
.card .actions { margin-top: auto; }
.actions a {
    color: var(--text); text-decoration: none;
    border: 1px solid var(--border);
    border-radius: .2rem;
    padding: .50rem;
    font-size: .85rem;
    font-weight: 600;
    transition: background-color .2s ease;
}

.actions a:hover {
    background-color: var(--surface-hover);
}

.about .lead { margin-bottom: .75rem; }

.contact .contact-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.contact a { color: var(--text); text-decoration: none; }
.contact a:hover { text-decoration: underline; }

.site-footer { padding-block: 2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .95rem; }

/* Reveal animations */
.reveal { opacity: 0; transform: translateY(12px); will-change: transform, opacity; }
.reveal.in-view { opacity: 1; transform: translateY(0); transition: transform .6s cubic-bezier(.22,1,.36,1), opacity .6s ease; }
.delay-1 { transition-delay: .08s; }
.delay-2 { transition-delay: .16s; }

@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }
  .reveal, .reveal.in-view { opacity: 1; transform: none; transition: none; }
  .button { transition: none; }
}


/* Project card banner */
.card-banner { 
  position: relative; 
  overflow: hidden; 
  border-radius: .6rem;
    margin: 0;
  aspect-ratio: 16 / 9;
  background: color-mix(in oklab, var(--surface) 70%, transparent); 
  border: 1px solid var(--border);
}
.card-banner img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  display: block; 
}

/* Top-of-article banner */
.post-banner {
  position: relative;
  overflow: hidden;
  border-radius: .9rem;
  margin: 0 0 0rem;
  aspect-ratio: 21 / 5;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid var(--border);
}
.post-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Cyber theme additions */
.brand { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.brand::before { content: "$ "; color: var(--accent); opacity: .9; }

.kicker { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; color: var(--accent); text-transform: lowercase; letter-spacing: .06em; margin: 0 0 .5rem; font-size: .9rem; }

.hero { position: relative; }
.hero .container { position: relative; z-index: 1; }

.expertises .features { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.25rem; }
@media (max-width: 1024px) { .expertises .features { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 640px) { .expertises .features { grid-template-columns: 1fr; } }

.feature-card { background: var(--surface); border: 1px solid var(--border); border-radius: .9rem; padding: 1rem; transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.feature-card h3 { margin: 0 0 .5rem; font-size: 1.05rem; letter-spacing: .1px; }
.feature-card p { margin: 0 0 .75rem; color: var(--muted); }

.card:hover, .feature-card:hover { border-color: color-mix(in oklab, var(--border), var(--accent)); transform: translateY(-2px); box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 38%, transparent), 0 18px 48px -20px color-mix(in oklab, var(--accent) 45%, transparent); }


/* Letter-by-letter hero animation */
.hero-title[data-animate="letters"] { white-space: pre-wrap; }
.hero-title[data-animate="letters"] .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.6em) scale(0.98);
  filter: blur(2px);
  will-change: transform, opacity, filter;
}
.hero-title[data-animate="letters"].in-view .char {
  animation: charIn .6s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes charIn {
  to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-title[data-animate="letters"] .char { opacity: 1; transform: none; filter: none; animation: none; }
}



/* Footer enhancements */
.footer-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: 1rem; 
  flex-wrap: wrap; 
}
.footer-left, .footer-right { display: flex; align-items: center; }
.footer-note { margin: 0; color: var(--muted); }
.footer-social { list-style: none; display: flex; gap: .5rem; margin: 0; padding: 0; }
.footer-social li { display: inline-flex; }
.social-link { 
  width: 40px; 
  height: 40px; 
  display: inline-flex; 
  align-items: center; 
  justify-content: center; 
  border: 1px solid var(--border); 
  border-radius: .6rem; 
  color: var(--muted); 
  background: color-mix(in oklab, var(--surface) 40%, transparent); 
  text-decoration: none; 
  transition: border-color .2s ease, color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; 
}
.social-link:hover, .social-link:focus-visible { 
  color: var(--text); 
  border-color: color-mix(in oklab, var(--border), var(--accent)); 
  background: color-mix(in oklab, var(--surface) 65%, transparent); 
  transform: translateY(-1.5px); 
  outline: none; 
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 35%, transparent);
}
.icon { width: 20px; height: 20px; }
/* Ensure inline SVG icons inherit color like other logos */
.icon path { fill: currentColor !important; }
/* Visually remove white backgrounds from logo images */
.logo--remove-white { mix-blend-mode: multiply; }
.heart { color: var(--accent); }
@media (max-width: 640px) {
  .footer-inner { flex-direction: column; align-items: flex-start; gap: .75rem; }
}


/* Post images: figure + caption */
article figure {
  margin: 1rem 0;
  border: 1px solid var(--border);
  border-radius: .6rem;
  overflow: hidden;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
}
article figure img {
  display: block;
  width: 100%;
  height: auto;
}
article figure figcaption {
  padding: .5rem .75rem;
  border-top: 1px solid var(--border);
  font-size: .9rem;
  color: var(--muted);
}

.card .article-title{
    margin-top: 0.8rem;
}

/* Code blocks and copy button */
article pre {
  position: relative;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: .6rem;
  padding: .75rem;
  background: var(--surface);
}
.copy-btn {
  position: absolute;
  top: .5rem;
  right: .5rem;
  z-index: 1;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 65%, transparent);
  color: var(--muted);
  border-radius: .4rem;
  padding: .25rem .5rem;
  font-size: .8rem;
  cursor: pointer;
}
.copy-btn:hover, .copy-btn:focus-visible {
  color: var(--text);
  border-color: color-mix(in oklab, var(--border), var(--accent));
  outline: none;
}


/* Blog listing: full-bleed, taller card banners */
.blog-list .card {
  display: flex;
  flex-direction: column;
  overflow: hidden; /* clip banner corners to card radius */
}
.blog-list .card .card-banner {
  /* make the banner span the full card width (cancel inner padding) */
  margin: -1rem -1rem 0 -1rem; /* top flush; sides bleed to edges */
  border: 0;            /* avoid double borders (card already has one) */
  border-radius: 0;     /* align with card edges */
  background: transparent;
  aspect-ratio: 21 / 8; /* wider and shorter to reduce vertical length */
}
.blog-list .card .card-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
@media (max-width: 640px) {
  .blog-list .card .card-banner { aspect-ratio: 16 / 9; } /* keep shorter height on small screens too */
}



/* Utilities */
.flex-row { display: flex; flex-direction: row; }
.mt-10p { margin-top: 10%; }

/* Hero avatar image */
.hero-avatar { border-radius: 100%; width: 250px; height: 250px; margin-left: 68%; position: absolute; }