/* ════════════════════════════════════════════════════════════
   THEME VARIABLES
   Edit only this block to restyle the entire site.

   Colors ────────────────────────────────────────────────────
   --bg          page / sidebar background
   --text        primary readable text
   --accent      hover & active highlight (nav links, more-link)
   --muted       secondary text: dates, year labels
   --faint       quietest text: section labels, inactive nav
   --subtle      descriptions, author lines
   --dim         venue / italic lines (lightest readable text)
   --surface     photo placeholder background
   --surface-2   project thumbnail placeholder background
   --tag-bg      tag pill fill
   --tag-text    tag pill text
   --border      underline borders on links
   --strong      publication titles, project names

   Typography ────────────────────────────────────────────────
   --font        font stack — swap entire family here
   --size-base   root px size — all rem values scale from this

   Layout ────────────────────────────────────────────────────
   --sidebar     fixed sidebar column width
   --photo       about-section photo column (responsive clamp)
   --col-date    news date column width
   --col-year    publication year column width
   ════════════════════════════════════════════════════════════ */
:root {
  /* colors */
  --bg:        #ddd8cd;
  --text:      #232323;
  --accent:    #fff152;
  --muted:     #696969;
  --faint:     #232323;
  --subtle:    #888;
  --dim:       #aaa;
  --surface:   #ddd;
  --surface-2: #e8e8e8;
  --tag-bg:    #f3f3f3;
  --tag-text:  #666;
  --border:    #ccc;
  --strong:    #111;

  /* typography */
  --font:      "Helvetica Neue", Helvetica, Arial, sans-serif;
  --size-base: 11px;

  /* layout */
  --sidebar:   250px;
  --photo:     clamp(150px, 20vw, 280px);
  --col-date:  80px;
  --col-year:  46px;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: var(--size-base);
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

/* ── Site Grid ───────────────────────────────────────────── */
/* SIDEBAR WIDTH — change --sidebar in :root above              */
.site-layout {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────── */
/* SIDEBAR PADDING
   padding: top  right  bottom  left
   Increase left to push content away from the browser edge.    */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 2.8rem 0 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.4rem;   /* vertical space between brand name and nav links */
  flex-shrink: 0;
}

.sidebar-main {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

/* SIDEBAR NAME
   font-size / font-weight control how prominent the name appears. */
.sidebar-brand {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
  display: block;
}
.sidebar-brand:hover {
  /* text-decoration: underline; */
  color: var(--accent);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;  /* space between nav links */
}

/* SIDEBAR NAV LINKS
   inactive color → --faint,  active/hover → --accent            */
.sidebar-nav a {
  display: block;
  font-size: 0.78rem;
  color: var(--text);
  padding: 0.1rem 0;
  transition: color 0.12s;
}
.sidebar-nav a:hover  {
  text-decoration: underline;
  color: var(--accent);
}
.sidebar-nav a.active { 
  text-decoration: underline;
  color: var(--accent);
}

/* SIDEBAR CONTACT LINKS — pinned to the bottom of the sidebar */
.sidebar-links {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.sidebar-links a {
  display: block;
  font-size: 0.72rem;
  color: var(--text);
  padding: 0.1rem 0;
  transition: color 0.12s;
  word-break: break-all;
}
.sidebar-links a:hover {
  text-decoration: underline;
  color: var(--accent);
 }

/* ── Main Scroll Area ────────────────────────────────────── */
/* MAIN CONTENT PADDING
   padding: top  right  bottom  left
   right (5vw)  : scales with viewport
   left  (3rem) : gap between sidebar and content              */
.main-scroll {
  min-width: 0;        /* prevents grid item from overflowing */
  padding: 2.8rem 5vw 6rem 3rem;
}

/* ── Section ─────────────────────────────────────────────── */
/* SECTION SPACING
   padding-top / padding-bottom : vertical space inside each section */
.site-section {
  padding-top: 2rem;
  padding-bottom: 1rem;
}
.site-section:first-child { padding-top: 0; }

/* PARALLEL SECTIONS — renders two sections side by side
   grid-template-columns : left column width  right column width
   e.g. "1fr 1fr" = equal halves, "2fr 3fr" = narrower left      */
.parallel-sections {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 0 3rem;
  align-items: start;
}
.parallel-sections .site-section { padding-top: 2rem; }

@media (max-width: 860px) {
  .parallel-sections { grid-template-columns: 1fr; }
}

/* SECTION LABEL  (small uppercase "ABOUT", "NEWS" …)
   letter-spacing : spread of capitals
   margin-bottom  : gap below label before content              */
.section-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
  margin-bottom: 1.5rem;
}

/* ── About ───────────────────────────────────────────────── */
/* ABOUT PHOTO COLUMN — change --photo in :root above
   gap : horizontal space between photo and bio text.           */
.about-grid {
  display: grid;
  grid-template-columns: var(--photo) 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* ABOUT PHOTO
   No forced aspect-ratio — image renders at its natural proportions.
   :not(:has(img)) gives the placeholder a portrait shape only when
   no real photo is present.
   background : --surface (placeholder fill)                    */
.about-photo {
  width: 100%;
  background: var(--surface);
  overflow: hidden;
}
.about-photo img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(50%);
  transition: filter 0.3s ease;
}
.about-photo:hover img { filter: grayscale(0%); }
.about-photo:not(:has(img)) {
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-photo-placeholder {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--subtle);
}

.about-body p {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.about-body p:last-child { margin-bottom: 0; }

/* ── News ────────────────────────────────────────────────── */
.news-list { display: flex; flex-direction: column; }

/* NEWS ROW
   --col-date : date column width — widen for longer date strings */
.news-row {
  display: grid;
  grid-template-columns: var(--col-date) 1fr;
  font-size: 0.85rem;
}
.news-row-date { color: var(--muted); flex-shrink: 0; }
.news-row-text { color: var(--text); }
.news-inline-link {
  text-decoration: underline;
  text-underline-offset: 2px;
}
.news-inline-link:hover { color: var(--accent); }

/* MORE LINK — plain underlined text, no button chrome          */
.more-link {
  display: inline-block;
  margin-top: 1.1rem;
  font-size: 0.78rem;
  color: var(--subtle);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
}
.more-link:hover { color: var(--accent); border-color: var(--accent); }

/* ── Publications ────────────────────────────────────────── */
.pub-list { display: flex; flex-direction: column; gap: 1.4rem; }

/* PUBLICATION ROW
   --col-year : year column width                               */
.pub-row {
  display: grid;
  grid-template-columns: var(--col-year) 1fr;
  gap: 1rem;
  align-items: start;
}

.pub-year {
  font-size: 0.75rem;
  color: var(--muted);
  padding-top: 0.15rem;
}

.pub-title-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--strong);
  display: block;
  margin-bottom: 0.2rem;
  line-height: 1.45;
}
.pub-title-link:hover { 
  text-decoration: underline;
  color: var(--accent);
}

.pub-authors { font-size: 0.78rem; color: var(--subtle); }
.pub-venue   { font-size: 0.78rem; color: var(--dim); font-style: italic; }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.4rem; }
.tag {
  font-size: 0.67rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.1rem 0.45rem;
  letter-spacing: 0.02em;
}

/* ── Projects ────────────────────────────────────────────── */
/* PROJECTS GRID COLUMNS
   repeat(3, 1fr) = 3 equal columns — change 3 to 2 or 4       */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-item a { display: block; }

/* GREY FILTER ON PROJECT THUMBNAILS
   grayscale(100%) = fully desaturated by default
   grayscale(0%)   = full color on hover
   Adjust the default value for a partial grey effect, e.g.
   grayscale(60%) keeps some color while still looking muted.    */
.project-thumb {
  filter: grayscale(80%);
  transition: filter 0.3s ease;
}
.project-item a:hover .project-thumb { filter: grayscale(0%); }

/* PROJECT THUMBNAIL
   aspect-ratio : 1 = square — try 4/3 for landscape
   background   : --surface-2 (placeholder fill)               */
.project-thumb {
  width: 100%;
  aspect-ratio: 1;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: opacity .15s;
}
.project-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.project-thumb-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--subtle);
}

.project-name {
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.45rem;
  color: var(--strong);
}
.project-item a:hover .project-name {
  text-decoration: underline;
  color: var(--accent);
}

.project-desc {
  font-size: 0.75rem;
  color: var(--subtle);
  margin-top: 0.2rem;
  line-height: 1.55;
}

/* ── Contact ─────────────────────────────────────────────── */
.contact-block { display: flex; flex-direction: column; gap: 0.4rem; }
.contact-block p { font-size: 0.85rem; color: var(--muted); }
.contact-block a { border-bottom: 1px solid var(--border); }
.contact-block a:hover {
  text-decoration: underline;
  color: var(--accent);
}

/* ── Responsive ──────────────────────────────────────────── */
/* Below 640px the sidebar collapses into a top bar and
   two-column grids drop to single / two columns.               */
@media (max-width: 640px) {
  .site-layout  { grid-template-columns: 1fr; grid-template-areas: "main" "sidebar"; }
  .main-scroll  { grid-area: main; padding: 1.5rem; }
  .sidebar      { grid-area: sidebar; position: static; width: 100%; height: auto; padding: 1.5rem; flex-direction: column; align-items: flex-start; border-top: 1px solid var(--border); gap: 1.2rem; }
  .sidebar-main { gap: 1rem; }
  .sidebar-nav  { flex-direction: row; gap: 1rem; }
  .sidebar-links { margin-top: 0; }
  .about-grid   { grid-template-columns: 1fr; max-width: 320px; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
}