header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.65);  /* translucent white */
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding: 0 32px;                        /* reduce side padding so menu fits */
  box-sizing: border-box;
}

/* right‑aligned nav container */
header nav {
  display: flex;
  justify-content: flex-end;   /* push items to right */
  align-items: center;         /* vertical‑center children */
  min-height: 60px;            /* consistent bar height */
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: flex-end;
  gap: 36px;
}

header nav ul li {
  display: flex;
  align-items: center;         /* keep links / buttons on same baseline */
}

header nav ul li a {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--apple-black);      /* black text on white bar */
  text-decoration: none;
  transition: color 0.25s;
  padding: 0;
  line-height: 60px;            /* for perfect vertical centering */
}

header nav ul li a:hover {
  color: var(--accent-orange);    /* orange on hover */
}

/* -------  Layout for projects.html  ------- */
:root {
  --apple-black: #1d1d1f;
  --apple-white: #ebebec;
  --grey-line: rgba(235, 235, 236, 0.25);
  --tag-purple: #6951ff;
  --tag-radius: 4px;
}

/* page wrapper */
.work-list {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 0 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* each entry */
.work-item {
  display: grid;
  grid-template-columns: 300px 1fr 90px; /* thumbnail | meta | year */
  gap: 40px;
  align-items: flex-start;
  border-top: 1.5px dashed #b6b6b8;
  padding-top: 32px;
}

.work-item:first-of-type {
  border-top: none;
}

/* thumbnail */
.work-thumb img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

/* meta text */
.work-meta h2 {
  margin: 0 0 8px 0;
  font-size: 1.7rem;      /* bigger, bolder headline */
  line-height: 1.35;
  color: var(--apple-black);
}

.work-authors {
  margin: 0 0 10px 0;
  font-size: 1.05rem;
  color: #333;
  line-height: 1.5;           /* more breathing room */
}

.work-tags {
  display: inline;          /* behave like normal inline text */
  list-style: none;
  margin: 0;
  padding: 0;
}

.work-tags .tag {
  display: inline-block;    /* keep pill shape */
  margin-right: 8px;        /* space before conference text */
  background: var(--tag-purple);
  color: #fff;
  border-radius: var(--tag-radius);
  padding: 4px 12px;      /* bigger pill */
  font-size: 0.9rem;      /* larger text */
  font-weight: 600;
}

/* conference description, inline with tag list */
.work-conf {
  display: inline;          /* stay on same line as tag */
  font-size: 0.95rem;
  color: #6a6a6a;           /* slightly lighter grey */
}

.work-links {
  display: flex;
  gap: 20px;                /* loosen link list spacing */
  flex-wrap: wrap;
}

.work-links a {
  font-size: 1rem;            /* was 0.85rem */
  color: var(--apple-black);
  text-decoration: none;
}

/* first link inside each work (Homepage) */
.work-links a:first-child {
  font-weight: 600;
  position: relative;
  padding-left: 22px;               /* room for icon */
}

.work-links a:first-child::before {
  content: "🔗";                    /* Unicode link icon */
  position: absolute;
  left: 0;
  top: 0;
}

.work-links a:hover {
  text-decoration: underline;
}

/* year column */
.work-year {
  font-size: 2rem;
  font-weight: 600;
  color: #c2c2c4;
  text-align: right;
  line-height: 1;
  margin-top: 4px;
}

/* ----------  Responsive  ---------- */
@media (max-width: 900px) {
  .work-item {
    grid-template-columns: 240px 1fr 70px;
    gap: 32px;
  }
}

@media (max-width: 700px) {
  .work-item {
    grid-template-columns: 1fr;
  }
  .work-thumb img {
    width: 100%;
  }
  .work-year {
    display: none;
  }
}

/* mobile drawer & hamburger (re‑use main site styles) */
@media (max-width: 700px) {
  /* hide desktop menu & keep smaller gap */
  header nav ul { 
    display: none; 
    gap: 24px; 
  }
  .mobile-drawer {
    display: none;
    position: fixed;
    top: 0;
    left: -100%;
    width: 75%;                     /* 75 % of screen */
    height: 100%;
    background: #ebebec;
    transition: left 0.3s ease;
    padding: 80px 28px;
    box-shadow: 4px 0 12px rgba(0,0,0,0.2);
    z-index: 1000;
  }
  .mobile-drawer.open { 
    left: 0; 
    display: block; 
  }

  .drawer-links li { margin-bottom: 32px; } /* adjusted spacing */
  .drawer-links a {
    font-size: 1.8rem;              /* larger for thumb navigation */
    font-weight: 600;
    color: var(--apple-black);
    text-decoration: none;
    line-height: 1.2;               /* added line-height */
  }

  /* ensure hamburger button visible */
  .hamburger {
    background: none;
    border: none;
    position: absolute;
    top: 18px;
    right: 5vw;
    display: block;
  }
}

.page-title {
  margin: 40px 0 50px 60px;
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--apple-black);
}

/* language switch buttons */
#lang-en,
#lang-zh {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: #000;
  border: 1.5px solid #000;
  border-radius: 4px;
  padding: 4px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s;
  margin: 0;                 /* remove previous offset */
}

#lang-en:hover,
#lang-zh:hover {
  background: #e6e6e6;
}

.work-abstract {
  margin-top: 12px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: #4a4a4a;
  max-width: 100%;
}