:root {
  --bg: #0d1110;
  --fg: #d8d9d6;
  --muted: #8f9d8f;
  --accent: #a9f0c2;
  --accent-hover: #d4e68f;
  --bar-bg: rgba(8, 11, 10, 0.97);
  --bar-border: #1f241f;
  --maxw: 820px;
  --lh: 1.65;
  --nav-height: 50px;
  --footer-height: 40px;
  --side-padding: 1.5rem;
  --banner-h: 90px;
  --banner-offset: -20px;
  --profile-pic: 100px;
}

html {
  scroll-behavior: smooth; 
  scroll-padding-top: calc(var(--banner-h) + var(--profile-pic)/0.81 + var(--nav-height));
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, sans-serif;
  line-height: var(--lh);
  padding-bottom: var(--footer-height);
  position: relative;
}

/* vertical lines spanning the page */
body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--bar-border);
  z-index: 0;
}

body::before {
  left: max(0px, calc(50% - var(--maxw) / 2 - 1px));
}

body::after {
  right: max(0px, calc(50% - var(--maxw) / 2 - 1px));
}

/* container */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--side-padding);
  box-sizing: border-box;
}

/* banner + profile + nav */
.header-container {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

/* banner */
.banner {
  position: relative;
  height: var(--banner-h);     
  overflow: hidden;            
  max-width: 100%;             
  margin: 0 auto;
  filter: grayscale(100%) sepia(30%) hue-rotate(70deg) saturate(50%);
  background: none;            
}
.banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  height: 100%;
  width: var(--maxw);          
  transform: translateX(-50%);
  background: url('files/banner.jpg') center center no-repeat;
  background-size: cover;       
}

/* profile row */
.profile-row,
nav {
  background: var(--bar-bg);
  border-bottom: 1px solid var(--bar-bg);
  border-top: 1px solid var(--bar-bg);
  max-width: var(--maxw);
  margin: 0 auto;
  width: 100%;
}

.profile-pic {
  position: absolute;
  top: calc(var(--banner-h) - var(--profile-pic) / 1.5); 
  width: var(--profile-pic);
  height: var(--profile-pic);
  border-radius: 50%;
  border: 2px solid var(--bar-border);
  object-fit: cover;
  background: var(--bg);
  z-index: 1002; 
  filter: grayscale(100%) sepia(30%) hue-rotate(70deg) saturate(50%);
}

.profile-text h1 {
  margin: 0 0 0.4rem 0;
  font-size: 1.3rem;
  margin-top: 0.95rem; 
}
.profile-text p {
  margin: 0 0 0.5rem 0;
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: -0.5rem;
}
.profile-text a {
  font-size: 0.95rem; 
  color: var(--muted);
  text-decoration: none;
}
.profile-text a:hover {
  color: var(--accent-hover);
}

/* top navigation */
nav {
  background: var(--bar-bg);
  border-bottom: 1px solid var(--bar-border);
  max-width: var(--maxw);   
  margin: 0 auto;          
}
nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 0;
  padding: 0.5rem 1rem;
  flex-wrap: nowrap; /* prevent wrapping */
  overflow-x: auto;  /* enable horizontal scroll if too long */
  -webkit-overflow-scrolling: touch; /* smooth scroll on mobile */
}

nav a {
  color: var(--muted);
  text-decoration: none;
}
nav a:hover,
nav a.active {
  color: var(--accent-hover);
}

/* main body */
main { padding: 2rem 0 3rem; 
}

section { margin: 3rem 0; }

h2, h3 {
  line-height: 1.25;
  margin: 0 0 0.8rem;
}
h2 { font-size: 1.35rem; margin-top: 3rem; }
h3 { font-size: 1.15rem; }

p, li { font-size: 0.95rem; }

/* footer */
.footer-wrap {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: var(--maxw);
  z-index: 1000;
}
footer {
  background: var(--bar-bg);
  color: var(--muted);
  text-align: center;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--bar-border);
  font-size: 0.9rem;
  height: var(--footer-height);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

/* links */
a { color: var(--muted); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* text selection */
::selection { background: #5c6e62; color: #e2e4e1; }

/* responsiveness */
@media (max-width: 820px) {
  .banner,
  .profile-row,
  nav,
  footer {
    max-width: 100%;
    margin: 0;
  }
}

/* horizontal lines */
.section-divider {
  border: 0;
  border-top: 1px solid var(--bar-border);
  position: relative;
  left: calc(-1 * var(--side-padding));              
  width: calc(100% + 2 * var(--side-padding));       
  margin: 2rem 0;                                    
  display: block;
}

/* blog figures */
.post-figure {
  text-align: center;
  margin: 20px 0;
}
.post-figure img {
  display: block;
  width: 100%;
  max-width: 300px;
  border-radius: 8px;
  margin: 0 auto;
}
.post-figure figcaption {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 5px;
}