#title-block-header {
  display: none !important;
}

#quarto-document-content,
main.content {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

body {
  color: black;
  padding-top: 0 !important;
}

/* FIGURE CAPTIONS: center align all figure captions */
figcaption {
  text-align: center;
  width: 100%;
}

/* INTRODUCTION SECTION: adds spacing at top */
#introduction {
  padding-top: 1em;
}

/* Center and size the video only */
#vid-demo .quarto-video {
  width: 30%;
  margin: 0 auto;
}

/* Adjust video caption style */
#vid-demo figcaption {
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

.fig-opt img {
  margin-left: 12%;
}

/* HERO CONTAINER: defines a full-screen section */
.hero {
  position: relative;    /* allows children to be positioned relative to this box */
  height: 100vh;         /* hero takes full screen height */
  overflow: hidden;      /* anything outside hero gets clipped */

  display: flex;         /* enables easy alignment of the card */
  align-items: center;   /* vertical center */
  justify-content: flex-start; /* put card on center */
  padding-left: 1vw;     /* spacing from left edge */

  /* Full-width breakout (removes white margins from theme container) */
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}

/* VIDEO BACKGROUND: fills the hero container */
.hero-video {
  position: absolute;  /* take it out of normal flow so it can be a background */
  inset: 0;            /* shorthand: top:0 right:0 bottom:0 left:0 */
  width: 100%;
  height: 100%;
  object-fit: cover;   /* crop to fill without stretching */
  z-index: 0;          /* behind everything */
}

/* OVERLAY: dark layer above video for readability */
.hero::before {
  content: "";               /* required for pseudo-element */
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.421); /* darkness */
  z-index: 1;                /* above video, below card */
}

/* CARD: sits above overlay */
.hero-card {
  position: relative;   /* keep it in normal flow but allow z-index */
  z-index: 2;           /* above overlay */
  /*width: min(520px, 85vw); /* responsive: max 520px but shrink on small screens */
  width: 45%;
  padding: 34px 36px;
  border-radius: 16px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

/* TEXT STYLES */
.hero-title {
  margin: 0;
  font-size: clamp(2.4rem, 2.5vw, 4.2rem); /* responsive font scaling */
  font-weight: 800;
}

.hero-subtitle {
  margin-top: 0.6rem;
  font-size: 1.25rem;
  opacity: 0.95;
}

.hero-authors {
  margin-top: 0.4rem;
  font-size: 1rem;
  opacity: 0.9;
}

.hero-authors a {
  color: #ffffff;
}

.hero-authors a:hover {
  color: rgb(30, 0, 255);
}

/* Sticky top navbar, black + transparent */
.navbar {
  background: rgba(0, 0, 0, 0.65) !important; /* black w/ transparency */
  backdrop-filter: blur(8px);                 /* optional: frosted glass */
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* Navbar text style */
.navbar .nav-link,
.navbar-brand {
  color: rgba(255,255,255,0.92) !important;
}

.navbar .nav-link:hover {
  color: #ffffff !important;
}

/* Prevent the navbar covering your headings when jumping */
section[id] {
  scroll-margin-top: 80px; /* adjust if your navbar height differs */
}