/* ==========================================================================
   giannisvassilopoulos.com — site styles
   Fonts: Cormorant Garamond (display) + EB Garamond (text), both SIL OFL 1.1
   ========================================================================== */

/* ---------- Fonts (self-hosted variable woff2) ---------- */
@font-face {
  font-family: "Cormorant Garamond Variable";
  font-style: normal; font-display: block; font-weight: 300 700;
  src: url("/assets/fonts/cormorant-garamond-latin-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "Cormorant Garamond Variable";
  font-style: normal; font-display: swap; font-weight: 300 700;
  src: url("/assets/fonts/cormorant-garamond-latin-ext-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "Cormorant Garamond Variable";
  font-style: italic; font-display: swap; font-weight: 300 700;
  src: url("/assets/fonts/cormorant-garamond-latin-wght-italic.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "Cormorant Garamond Variable";
  font-style: italic; font-display: swap; font-weight: 300 700;
  src: url("/assets/fonts/cormorant-garamond-latin-ext-wght-italic.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "EB Garamond Variable";
  font-style: normal; font-display: block; font-weight: 400 800;
  src: url("/assets/fonts/eb-garamond-latin-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "EB Garamond Variable";
  font-style: normal; font-display: swap; font-weight: 400 800;
  src: url("/assets/fonts/eb-garamond-latin-ext-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "EB Garamond Variable";
  font-style: italic; font-display: swap; font-weight: 400 800;
  src: url("/assets/fonts/eb-garamond-latin-wght-italic.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "EB Garamond Variable";
  font-style: italic; font-display: swap; font-weight: 400 800;
  src: url("/assets/fonts/eb-garamond-latin-ext-wght-italic.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* ---------- Tokens ---------- */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --ink: #000000;
  --ink-2: #000000;
  --ink-3: #000000;
  --rule: #000000;
  --rule-strong: #000000;
  --shadow: 0 0 0;
  --glare: 255 255 255;
  --selection: #000000;

  --display: "Cormorant Garamond Variable", "Cormorant Garamond", "Garamond", "Times New Roman", serif;
  --text: "EB Garamond Variable", "EB Garamond", "Garamond", "Georgia", serif;

  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --maxw: 76rem;
  --ease: cubic-bezier(.2, .8, .2, 1);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --surface: #000000;
  --ink: #ffffff;
  --ink-2: #ffffff;
  --ink-3: #ffffff;
  --rule: #ffffff;
  --rule-strong: #ffffff;
  --shadow: 0 0 0;
  --glare: 255 255 255;
  --selection: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #000000;
    --surface: #000000;
    --ink: #ffffff;
    --ink-2: #ffffff;
    --ink-3: #ffffff;
    --rule: #ffffff;
    --rule-strong: #ffffff;
    --shadow: 0 0 0;
    --glare: 255 255 255;
    --selection: #ffffff;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100svh;
  display: flex; flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1.125rem;
  line-height: 1.6;
  font-kerning: normal;
  font-variant-ligatures: common-ligatures;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color .4s var(--ease), color .4s var(--ease);
}
::selection { background: var(--ink); color: var(--bg); }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .2em;
  text-decoration-color: var(--rule-strong);
  transition: text-decoration-color .25s var(--ease), color .25s var(--ease);
}
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 2px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--gutter); top: -3rem; z-index: 100;
  padding: .5rem .9rem; background: var(--ink); color: var(--bg);
  text-decoration: none; font-family: var(--display); font-size: 1rem; border-radius: 2px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 1rem; }

.wrap { width: 100%; max-width: calc(var(--maxw) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- Header ---------- */
.site-header { position: relative; z-index: 20; }
.site-header .wrap {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1.5rem;
  padding-block: clamp(1.4rem, 3.2vw, 2.6rem);
}
.site-name {
  font-family: var(--display);
  font-weight: 450;
  font-size: clamp(1.7rem, 1.25rem + 1.4vw, 2.45rem);
  letter-spacing: -.005em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 1.75rem); }
.site-nav ul { display: flex; gap: clamp(1rem, 2vw, 1.6rem); }
.site-nav a {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.14rem;
  letter-spacing: .015em;
  text-decoration: none;
  position: relative;
  padding-block: .25rem;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform .45s var(--ease);
}
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }

.icon-btn {
  appearance: none; border: 0; background: none; color: inherit; cursor: pointer;
  width: 2.1rem; height: 2.1rem; display: inline-grid; place-items: center; border-radius: 50%;
  transition: background-color .25s var(--ease);
}
.icon-btn:hover { background: transparent; opacity: .6; }
.icon-btn svg { width: 1.05rem; height: 1.05rem; }
.theme-toggle svg { transition: transform .6s var(--ease); }
:root[data-theme="dark"] .theme-toggle svg { transform: rotate(180deg); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-toggle svg { transform: rotate(180deg); } }

.menu-btn { display: none; font-family: var(--display); font-size: 1.15rem; font-weight: 500; letter-spacing: .02em; width: auto; padding: 0 .35rem; border-radius: 2px; height: auto; }

/* Mobile menu */
@media (max-width: 47.99rem) {
  .site-nav ul { display: none; }
  .menu-btn { display: inline-block; }
  .site-header .wrap { align-items: center; }
  .site-nav { gap: .5rem; }
  .menu-open .site-nav ul {
    display: flex; flex-direction: column; gap: .4rem;
    position: fixed; inset: 0; z-index: -1;
    padding: 7.5rem var(--gutter) 2rem;
    background: var(--bg);
    animation: menu-in .45s var(--ease) both;
  }
  .menu-open .site-nav ul a { font-size: 2.6rem; font-weight: 400; letter-spacing: 0; }
  .menu-open { overflow: hidden; }
}
@keyframes menu-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Main ---------- */
main { flex: 1; display: flex; flex-direction: column; }
.page { padding-bottom: clamp(1.75rem, 4vw, 3rem); }

/* Entrance */
/* No load animations: pages appear immediately and stay put */
.rise { animation: none; }

/* ---------- Home ---------- */
.hero {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 23rem) minmax(0, 40rem);
  justify-content: center;
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5.5rem);
  /* optically centered: a little more room below than above */
  padding-block: clamp(1rem, 2.5vh, 2rem) clamp(3rem, 11vh, 7.5rem);
}
.portrait { margin: 0; }
.portrait .tilt { transform: none; box-shadow: none; will-change: auto; aspect-ratio: 720 / 990; background: var(--rule); border-radius: 2px; }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
/* discourage saving the photo: no dragging, no long-press menu, right-click lands on the frame */
.portrait img { pointer-events: none; -webkit-user-drag: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.portrait .tilt { -webkit-touch-callout: none; user-select: none; -webkit-user-select: none; }
.intro { font-family: var(--display); font-weight: 450; font-size: clamp(1.6rem, 1.1rem + 1.35vw, 2.2rem); line-height: 1.3; letter-spacing: -.003em; }
.intro p + p { margin-top: .8em; }
.intro em { font-style: italic; }
.intro a { text-decoration-color: var(--ink); text-underline-offset: .16em; }
.intro a:hover { text-decoration-color: var(--ink); }
.say { white-space: nowrap; }

/* ---------- Tilt ---------- */
.tilt {
  --rx: 0deg; --ry: 0deg; --gx: 50%; --gy: 50%; --glare-o: 0; --lift: 0;
  position: relative;
  transform: perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry)) translateZ(0);
  transform-style: preserve-3d;
  transition: transform .8s var(--ease), box-shadow .8s var(--ease);
  box-shadow: 0 calc(var(--lift) * 18px) calc(var(--lift) * 40px) calc(var(--lift) * -12px) rgb(var(--shadow) / calc(.28 * var(--lift)));
  will-change: transform;
  overflow: hidden;
}
.tilt.is-active { transition: transform .12s linear, box-shadow .5s var(--ease); }
.tilt::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: radial-gradient(circle at var(--gx) var(--gy), rgb(var(--glare) / .38), rgb(var(--glare) / 0) 55%);
  opacity: var(--glare-o);
  mix-blend-mode: soft-light;
  transition: opacity .6s var(--ease);
}
@media (prefers-reduced-motion: reduce) {
  .tilt { transform: none !important; transition: none; }
  .tilt::after { display: none; }
  .rise { animation: none; }
}

/* ---------- Sections (two-column) ---------- */
.section {
  display: grid;
  grid-template-columns: minmax(0, 17rem) minmax(0, 1fr);
  gap: clamp(1.25rem, 6vw, 6rem);
  padding-block: clamp(2.5rem, 6vw, 4.75rem);
  border-top: 1px solid var(--rule);
  align-items: baseline;   /* section name and first item share a baseline */
}
.page > section.section:first-of-type { border-top: 0; padding-top: clamp(1.5rem, 5vw, 4rem); }
.page > section.section:last-of-type { padding-bottom: 0; }
.section-head { position: relative; }
.section-head > div { position: sticky; top: 2rem; }
.section-title {
  font-family: var(--display);
  font-size: clamp(2rem, 1.4rem + 1.6vw, 2.8rem);
  line-height: 1.08;
  letter-spacing: -.005em;
}
.section-note { margin-top: .9rem; color: var(--ink-3); font-size: 1rem; line-height: 1.5; max-width: 16rem; }
.section-body { max-width: 50rem; min-width: 0; }

.kicker {
  font-family: var(--display);
  font-size: .95rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3);
}

/* Entry lists (CV-style: text | date) */
.entries > li {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .35rem 2rem;
  padding-block: .62rem;
  border-bottom: .5px solid var(--rule);   /* hairline divider between entries */
}
.entries > li:first-child { padding-top: 0; }
.entries > li:last-child { border-bottom: 0; }
.entry-date {
  font-variant-numeric: oldstyle-nums tabular-nums;
  color: var(--ink-3); white-space: nowrap; text-align: right;
  font-size: 1.02rem; padding-top: .08rem;
}
.role { font-weight: 500; }
.tag {
  display: inline-block; margin-left: .45rem; vertical-align: .18em;
  padding: .02rem .36rem .06rem; border: 1px solid var(--rule-strong); border-radius: 99px;
  font-family: var(--display); font-size: .51rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-2); line-height: 1.4;
}

/* Research */
.areas { font-family: var(--display); font-size: clamp(1.4rem, 1.1rem + .8vw, 1.8rem); line-height: 1.35; }
.areas li { display: inline; }
.areas li:not(:last-child)::after { content: " · "; color: var(--ink-3); }
.areas-sub { margin-top: .9rem; color: var(--ink-2); }

.papers { display: grid; gap: clamp(2rem, 3.5vw, 2.6rem); }
.paper { padding: 0; background: none; border: 0; }
.paper-title { font-family: var(--display); font-size: clamp(1.35rem, 1.1rem + .6vw, 1.7rem); line-height: 1.18; font-weight: 500; }
.paper-meta { margin-top: .45rem; color: var(--ink-3); font-size: 1rem; }
.abstract { margin-top: 1rem; }
.abstract summary {
  cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: .45rem;
  font-family: var(--display); font-size: 1.1rem; font-weight: 600; letter-spacing: .02em;
}
.abstract summary::-webkit-details-marker { display: none; }
.abstract summary::before {
  content: ""; width: .5rem; height: .5rem; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg); transition: transform .35s var(--ease); margin-right: .1rem;
}
.abstract[open] summary::before { transform: rotate(45deg) translate(-2px, -2px); }
.abstract p { margin-top: .6rem; color: var(--ink-2); hyphens: auto; }
.presented { margin-top: .6rem; }
.presented .entries { padding-left: 1.2em; }   /* venues sit a step in from the title */
.presented .kicker { display: block; margin-bottom: .55rem; font-size: .82rem; }
.presented .entries > li { padding-block: .45rem; font-size: 1.05rem; }
.presented .entries > li:first-child { padding-top: .1rem; }

/* Teaching */
.stats { display: flex; flex-wrap: wrap; gap: .4rem 2.25rem; margin-bottom: 2rem; }
.stat { display: flex; flex-direction: column; }
.stat b { font-family: var(--display); font-weight: 400; font-size: clamp(2.4rem, 1.8rem + 1.6vw, 3.2rem); line-height: 1; font-variant-numeric: lining-nums; }
.stat span { color: var(--ink-3); font-size: .98rem; }
.courses { display: grid; gap: 1.6rem; }
.course { padding: 0; background: none; border: 0; }
.course-title { font-family: var(--display); font-size: 1.75rem; line-height: 1.15; font-weight: 500; }
.course-meta { margin-top: .35rem; color: var(--ink-2); }
.course-meta .sep { color: var(--ink-3); margin-inline: .35rem; }

/* CV page */
.cv-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.4rem; }
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .7rem 1.2rem .75rem; border-radius: 2px;
  font-family: var(--display); font-size: 1.12rem; font-weight: 600; letter-spacing: .02em; line-height: 1;
  text-decoration: none; border: 1px solid var(--ink);
  transition: background-color .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.btn svg { width: 1rem; height: 1rem; }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.cv-lede a { text-underline-offset: .16em; }
.cv-lede { font-family: var(--display); font-size: clamp(1.45rem, 1.1rem + .9vw, 1.9rem); line-height: 1.3; }
.cv-lede + .cv-actions { margin-top: 1.6rem; }
.edu > li { padding-bottom: 1.6rem; }
.edu > li:last-child { padding-bottom: 0; }
.edu-school { font-family: var(--display); font-size: 1.6rem; line-height: 1.2; font-weight: 500; margin-bottom: .45rem; }
.edu-lines { border-top: 1px solid var(--rule); }
.edu-lines > li:first-child { padding-top: .62rem; }
.edu-note { color: var(--ink-2); }
.inline-list { display: flex; flex-wrap: wrap; gap: .2rem 0; }
.inline-list li:not(:last-child)::after { content: "·"; margin-inline: .6rem; color: var(--ink-3); }
.xref { color: var(--ink-2); }
.xref a { color: var(--ink); }

/* Teaching: university -> role -> course, as on the CV */
.role-group + .role-group { margin-top: 1.9rem; }
.role-label { font-family: var(--display); font-style: italic; font-weight: 450; font-size: 1.35rem; line-height: 1.2; margin-bottom: .55rem; }
.entry-detail { display: block; margin-top: .15rem; padding-left: 1.2em; }

/* CV page: a single sentence */
.cv-page { padding-top: clamp(2rem, 8vh, 6rem); }
.cv-line { font-family: var(--display); font-weight: 450; font-size: clamp(1.6rem, 1.1rem + 1.35vw, 2.2rem); line-height: 1.3; }
.cv-line a { text-underline-offset: .16em; text-decoration-color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { color: var(--ink); font-size: .95rem; }
.site-footer .wrap { text-align: center; padding-block: .75rem 2rem; }
.site-footer address { font-style: normal; line-height: 1.5; }
.site-footer a { color: var(--ink-2); }
.foot-meta { display: flex; gap: 1.5rem; align-items: baseline; flex-wrap: wrap; }

/* ---------- 404 ---------- */
.notfound { flex: 1; display: grid; place-content: center; text-align: center; gap: 1rem; padding-block: 4rem; }
.notfound h1 { font-family: var(--display); font-size: clamp(3rem, 2rem + 4vw, 5.5rem); line-height: 1; }
.notfound p { color: var(--ink-2); }

/* ---------- Responsive ---------- */
@media (max-width: 47.99rem) {
  body { font-size: 1.08rem; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-top: .5rem; justify-items: start; }
  .portrait { width: min(62%, 17rem); }
  .section { grid-template-columns: minmax(0, 1fr); gap: 1.4rem; }
  .section-head > div { position: static; }
  .section-note { max-width: none; }
  .entries > li { grid-template-columns: minmax(0, 1fr); gap: .1rem; }
  .entry-date { text-align: left; order: -1; font-size: .95rem; }
  .edu-lines li { grid-template-columns: minmax(0,1fr); gap: 0; }
}

/* ---------- Print ---------- */
@media print {
  :root { --bg: #fff; --surface: #fff; --ink: #000; --ink-2: #222; --ink-3: #555; --rule: #ccc; }
  .site-nav, .skip-link, .cv-actions, .abstract summary::before { display: none !important; }
  .tilt { transform: none !important; box-shadow: none !important; }
  .section { break-inside: avoid; padding-block: 1.25rem; }
  .section-head > div { position: static; }
  a { text-decoration: none; }
  .abstract:not([open]) > *:not(summary) { display: block; }
}