html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: #222;
  background-color: #f9f9f9;
}

footer {
  background: #eee;
  text-align: center;
  padding: 1em;
  font-size: 0.9em;
  color: #777;
}

footer p {
  margin: 0.2em 0;
  flex: 1 1 100%;
  text-align: center;
}

p a {
  color: #0077cc;
}

p a:visited {
  color: inherit; /* or use the same color as unvisited */
}


/* 📝 TITLE & META */
.article-main {
  max-width: 1000px;
  margin: 2em auto;
  text-align: left;
  padding-left: 1em;
  padding-right: 1em;
}

.article-title {
  font-family: 'Poppins', sans-serif;
  font-size: 1.7rem;
  margin-bottom: 0.4em;
}

.article-summary {
  font-size: 1.2rem;
  font-style: italic;
  color: #555;
  margin-bottom: 0.2em;
}

.article-author {
  font-size: 0.95rem;
  color: #777;
  margin-bottom: 0.5em;
  font-weight: bold;
}

/* 🧾 ARTICLE TEXT */
.article-body {
  text-align: left;
}

.article-body p {
  margin-bottom: 1.2em;
}

.lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: #333;
}

.section-heading {
  font-size: 1.4rem;
  margin-top: 2em;
  margin-bottom: 0.8em;
  border-left: 4px solid #3a6ea5;
  padding-left: 0.5em;
}

.subheading {
  font-size: 1.2rem;
  margin-top: 1.5em;
  color: #3a6ea5;
}

.quote {
  margin: 1.5em 0;
  padding: 1em;
  background-color: #eef2f6;
  border-left: 4px solid #3a6ea5;
  font-style: italic;
}

.note {
  background: #fff9e6;
  padding: 0.75em 1em;
  border-left: 4px solid #e6a500;
  color: #444;
  font-size: 0.95rem;
  margin-top: 1em;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
header {
  /* translucent dark background with blur */
  background: rgba(22, 22, 22, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari support */
  color: white;
  padding: 0em 1em;
  position: sticky;
  top: 0;
  z-index: 1000;
  /* border-bottom: 3pt solid #555; */
  border-bottom: 5px solid transparent;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-right: 0;
  padding: 0.75em 0;
  border-image: linear-gradient(to right, #3a6ea5 0%, transparent 0%) 1;
  transition: border-image 0.2s ease-out;
  height:40px;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 0.6em; /* spacing between logo and text */
}

.header-logo {
  height: 70px; /* adjust to fit your design */
  width: auto;
}

.site-name {
  font-size: 1.5em;
  margin: 0;
}

.site-name a {
  text-decoration: none;
  color: inherit;
}


/* Desktop navigation */
.desktop-nav {
  display: flex;
}

.desktop-nav a {
  margin-left: 1em;
  color: white;
  text-decoration: none;
  padding: 0.3em 0;
}

.desktop-nav a:hover {
  text-decoration: underline;
}

.desktop-nav a.active {
  font-weight: bold;
}

/* Mobile hamburger & menu */
#menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8em;
  color: white;
  cursor: pointer;
  margin: 0;
}

#mobile-menu {
  display: none;
  flex-direction: column;
  background: rgba(22, 22, 22, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari support */
  padding: 1em;
  position: absolute;
  top: 100%;
  right: 0; /* 🔹 align to right */
  width: fit-content; /* or a fixed width like 200px */
  text-align: right;  /* aligns text to the right */
}

#mobile-menu.show {
  display: flex;
}

#mobile-menu a {
  text-align: right;
  padding: 0.5em 0;
  color: white;
  text-decoration: none;
}

#mobile-menu a.active {
  font-weight: bold;
}

/* Social icon container */
.social-links {
  display: flex;
  justify-content: center;
}

.social-icon {
  height: 24px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  transition: transform 0.3s ease, filter 0.3s ease;
}

.social-icon:hover {
  filter: grayscale(0%) brightness(1.2);
  transform: scale(1.1);
}

.main-article-image {
  display: block;
  height: 40vh; /* fixed visible height across all articles */
  width: 100%;
  object-fit: cover;       /* crop larger images */
  border-radius: 6px;
  margin: 1.5em 0;
}

.main-article-image-bottom {
  display: block;
  width: 100%;
  height: 40vh; /* fixed visible height across all articles */
  object-fit: cover;       /* crop larger images */
  object-position:bottom; /* focus point: center by default */
  border-radius: 6px;
  margin: 1.5em 0;
}

.main-article-image-bottom-right {
  display: block;
  width: 100%;
  height: 40vh; /* fixed visible height across all articles */
  object-fit: cover;       /* crop larger images */
  object-position:bottom right; /* focus point: center by default */
  border-radius: 6px;
  margin: 1.5em 0;
}

.main-article-image-top {
  display: block;
  width: 100%;
  height: 40vh; /* fixed visible height across all articles */
  object-fit: cover;       /* crop larger images */
  object-position:top; /* focus point: center by default */
  border-radius: 6px;
  margin: 1.5em 0;
}

.captioned-image {
  text-align: center;
  margin: 2em 0;
}

.captioned-image img {
  max-width: 100%;
  max-height: 400px;
  height: auto;
  border-radius: 6px;
}

.captioned-image figcaption {
  font-size: 0.9rem;
  color: #666;
  margin-top: 0.5em;
  font-style: italic;
}

.references {
  margin-top: 3em;
  padding-top: 1em;
  border-top: 1px solid #ccc;
}

.references h3 {
  font-size: 1.2rem;
  color: #3a6ea5;
  margin-bottom: 0.5em;
}

.references ol {
  list-style: none; 
  padding-left: 0;
}

.references li {
  margin-bottom: 0.8em;
  font-size: 0.95rem;
  color: #444;
}

.article-body sup {
  font-size: 0.75em;
  vertical-align: super;
}

.article-body a[href^="#ref-"] {
  color: #3a6ea5;          /* consistent accent color */
  text-decoration: none;   /* no underline */
  font-weight: 500;
}

.article-body a[href^="#ref-"]:hover,
.article-body a[href^="#ref-"]:focus,
.article-body a[href^="#ref-"]:visited {
  color: #3a6ea5;          /* keeps same color after click */
  text-decoration: none;   /* still no underline */
}

.references a {
  color: #4d4d4d;            /* your accent color */
  text-decoration: none;     /* no underline by default */
}

.references a:hover,
.references a:focus {
  text-decoration: underline; /* underline ONLY on hover/focus */
}

.references a:visited {
  color: #4d4d4d;             /* same color even after click */
  text-decoration: none;      /* no underline after click */
}

.back-wrapper {
  width: 100%;
  text-align: left;
  padding: 0;
  margin-top: -0.5em; /* Optional tweak for spacing consistency */
}

.back-link {
  display: inline-block;
  padding: 0.4em 0.8em;
  border: 1px solid #bbb;
  border-radius: 4px;
  color: #444;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.download-wrapper {
  width: 100%;
  text-align: right;
  padding: 0;
  margin-right: 10em; /* Optional tweak for spacing consistency */
}

.back-button {
    display: inline-block;
    padding: 0.6em 1.2em;
    margin-right: 1em;
    border: 1px solid #ccc;
    background: none;
    color: #333;
    font-size: 12;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.back-button:hover {
  border-color: #888;
  color: #222;
}

.back-button:visited {
  color: #444;
  text-decoration: none;
} 

.back-link:hover,
.back-link:focus {
  border-color: #888;
  color: #222;
}

.back-link:visited {
  text-decoration: none;
}

.article-date {
  color: #777;
  margin: 0;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 12px;
}

.slider-label {
  min-width: 80px;     /* space for the text label */
}

.value-box, .value-box-freq {
  width: 60px;
  padding: 4px;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #f8f8f8;
  position: relative;       /* <— REQUIRED for the ::after to work */
}

.value-slider, .value-slider-freq {
  width: 25vw;         /* = 25% of viewport width  */
  max-width: 300px;    /* optional cap so it doesn’t get too long on large screens */
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #e0e0e0;
  }

  header {
    background-color: rgba(20, 20, 20, 0.85);
    color: #f0f0f0;
  }

  .site-name a,
  .desktop-nav a,
  #mobile-menu a {
    color: #f0f0f0;
  }

  .desktop-nav a:hover,
  #mobile-menu a:hover {
    color: #3a6ea5;
  }

  .article-title {
    color: #f9f9f9;
  }

  .article-summary,
  .article-author {
    color: #aaa;
  }

  .main-article-image {
    border: 2px solid #333;
  }

  .article-body p,
  .lead {
    color: #ddd;
  }

  .section-heading {
    border-left-color: #3a6ea5;
    color: #f9f9f9;
  }

  .subheading {
    color: #3a6ea5;
  }

  .quote {
    background-color: #1a1a1a;
    border-left-color: #3a6ea5;
    color: #ccc;
  }

  .note {
    background-color: #2a2a2a;
    border-left-color: #e6a500;
    color: #ddd;
  }

  footer {
    background-color: #1c1c1c;
    color: #aaa;
  }

  .signature {
    color: #aaa;
  }

  .social-icon {
    filter: brightness(0.8);
  }

  .social-icon:hover {
    filter: brightness(1.2);
  }

  .captioned-image figcaption {
  color: #aaa;
  }

  references {
    border-top-color: #555;
  }

  .references h3 {
    color: #4a8bdf;
  }

  .references li {
    color: #ffffff;
  }

  .references a:visited {
    color: #ffffff;             /* same color even after click */
    text-decoration: none;      /* no underline after click */
  }

    .references a {
    color: #ffffff;             /* same color even after click */
    text-decoration: none;      /* no underline after click */
  }

  .back-link {
    border-color: #939393;
    color: #d7d7d7;
  }

  .back-link:hover,
  .back-link:focus {
    border-color: #dfdfdf;
    color: #fffefe;
  }

  .back-link:visited {
    color: #d7d7d7;
    text-decoration: none;
  } 
  .article-date {
    color: #aaa;
  }

  .back-button {
    border-color: #939393;
    color: #d7d7d7;
  }

  .back-button:hover,
  .back-button:focus {
    border-color: #dfdfdf;
    color: #fffefe;
  }

  .back-button:visited {
    color: #d7d7d7;
    text-decoration: none;
  } 

  p a {
    color: #0077cc;
  }

  p a:visited {
    color: inherit; /* or use the same color as unvisited */
  }
}


@media (max-width: 750px) {
  .desktop-nav {
    display: none;
  }

  nav a {
    margin: 0;
  }

  .article-main {
    justify-content: left;
    text-align: left;
  }

    #menu-toggle {
    display: block;
    }
}