/* =========================================================
   DESIGN TOKENS
========================================================= */
:root {
  --bg: #f6f7f8;
  --bg-menu: #ffffff;
  --surface: #f5f5f5;
  --toggle: #8210d9;
  --text: #121212;
  --quote: #5f5f5f;
  --text-muted: rgba(0, 0, 0, 0.65);
  --border: rgba(0, 0, 0, 0.1);
  --accent: #8210d9;

  --font: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  --h1: 2.75rem;
  --h2: 2.25rem;
  --h3: 1rem;
  --nav: 1.05rem;
  --body: 14px;
  --small: 0.75rem;

  --xs: 4px;
  --s: 8px;
  --m: 16px;
  --l: 24px;
  --xl: 48px;
  --xxl: 64px;

  --text-s: 12px;
  --text-m: 14px;
  --text-l: 16px;
  --text-xl: 24px;

  --radius-s: 8px;
  --radius-m: 16px;
  --radius-pill: 999px;

  --shadow: 0 12px 32px #9b9b9b52;

  --profile-image-max-width: 300px;

  --fast: 0.2s ease;
  --slow: 0.35s ease;
}

body.dark {
  --bg: #222123;
  --bg-menu: #0d0c0e;
  --surface: #333136;
  --toggle: #834cae;
  --text: #d1cad5;
  --text-muted: #b5adba;
  --quote: #b5adba;
  --quote-bg: #312e32;
  --border: #29252d;
  --accent: #834cae;
  --shadow: 0 12px 32px #0b0b0b;
}

/* =========================================================
   BASE
========================================================= */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--body);
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  transition: background-color var(--slow), color var(--slow);
}

/* =========================================================
   TYPOGRAPHY
========================================================= */
h1, h2, h3 {
  margin: 0 0 var(--l);
  line-height: 1.25;
}

h3 {
  text-transform: uppercase;
  font-weight: 300;
  color: var(--accent);
}

h1 { font-size: var(--h1); }
h2 { font-size: var(--h2); }
h3 { font-size: var(--h3); }

p {
  margin: 0 0 var(--m);
  max-width: 100%;
  color: var(--text-muted);
}

/* =========================================================
   PAGE WRAPPER
========================================================= */
.page {
  max-width: 100%;
  margin-top: 0;
  margin-bottom: 0;
  margin-left: var(--xl);
  margin-right: var(--xl);
  padding: 0;
}

/* =========================================================
   NAVIGATION
========================================================= */
nav {
  position: sticky;
  top: 0;
  z-index: 1000;

  height: 3.5rem;
  min-height: 5rem;

  display: flex;
  align-items: center;
  gap: var(--l);

  margin-bottom: var(--l);
  padding: var(--l);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

#menuToggle {
  display: none;
}

/* ---------- MENU ---------- */
#menuList {
  display: flex;
  align-items: center;
  gap: var(--l);
  list-style: none;
  padding: 0;
  margin: 0;
}

#menuList a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: var(--nav);
  position: relative;
}

#menuList a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--fast);
}

#menuList a:hover::after,
#menuList a.active::after {
  transform: scaleX(1);
}

/* =========================================================
   THEME SWITCH
========================================================= */
.theme-switch {
  display: flex;
  align-items: center;
  height: 100%;
  margin-left: auto
}

.theme-switch__input {
  display: none;
}

.theme-switch__label {
  width: 56px;
  height: 28px;
  background: var(--toggle);
  border-radius: var(--radius-pill);
  cursor: pointer;
  position: relative;
}

.theme-switch__label::before {
  content: "☀️";
  position: absolute;
  left: 5px;
  top: 5px;
  font-size: 0.8rem;
  z-index: 1000;
}

.theme-switch__label::after {
  content: "🌙";
  position: absolute;
  right: 8px;
  top: 5px;
  font-size: 0.6rem;
  z-index: 1000;
}

.theme-switch__slider {
  width: 22px;
  height: 22px;
  background: var(--surface);
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 3px;
  box-shadow: var(--shadow);
  transition: transform var(--slow);
}

.theme-switch__input:checked + .theme-switch__label .theme-switch__slider {
  transform: translateX(28px);
}

/* =========================================================
   MAIN SECTIONS
========================================================= */
main > section {
  background: var(--surface);
  padding: var(--xl);
  margin-bottom: var(--xl);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow);
}

/* =========================================================
   HOME LAYOUT
========================================================= */

.home-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--xl);
  align-items: start;
}

/* Stack on mobile */
@media (max-width: 800px) {
  .home-grid {
    grid-template-columns: 1fr;
  }
}

.home-grid > section.welcome-home {
  background: var(--surface);
  padding: var(--xl);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow);
}

.home-grid > section.upcoming-news {
  background: transparent;
  box-shadow: none;
  padding: var(--m);
  border-radius: 0;
}

/* =========================================================
   HOME – UPCOMING TALKS
========================================================= */

.upcoming-news {
  margin: 0;
}

.upcoming-news-list {
  list-style: none;
  padding: 0 1rem 0 0;
  margin: var(--l) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--m);
}

.upcoming-news-list li {
  display: flex;
  gap: var(--m);
}

.upcoming-dot {
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.upcoming-news-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.upcoming-news-content strong {
  font-weight: 600;
  color: var(--text);
}

.upcoming-news-meta {
  font-size: var(--text-s);
  color: var(--text-muted);
}

.upcoming-news-link {
  margin-top: 4px;
  font-size: var(--text-s);
  color: var(--accent);
}

.upcoming-news-link:hover {
  text-decoration: none;
}

.link-underline {
  position: relative;
  text-decoration: none;
  color: var(--accent);
  font-weight: 500;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--fast);
}

.link-underline:hover::after,
.link-underline:focus-visible::after {
  transform: scaleX(1);
}


/* =========================================================
   ABOUT
========================================================= */
.content-section {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--xl);
}

.content-section img {
  width: 100%;
  max-width: var(--profile-image-max-width);
  border-radius: var(--radius-s);
}

/* =========================================================
   SPEAKING / PUBLICATIONS / CV (ACCORDION)
========================================================= */
.speaking-year {
  margin-top: var(--xl);
  padding-top: var(--l);
  border-top: 1px solid var(--border);
}

.speaking-summary {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: var(--m);
  align-items: center;
  cursor: pointer;
  padding: var(--s) 0;
}

.cv-grid .speaking-year {
  margin: var(--m);
}

.cv-grid .speaking-summary {
  grid-template-columns: 1fr;
}

.speaking-title::before {
  position: absolute;
  content: "›";
  font-size: 1rem;
  opacity: 0.5;
  transition: transform var(--fast), opacity var(--fast);
  left: -1rem;
}

details[open] > .speaking-title::before {
  transform: rotate(90deg);
  opacity: 0.9;
}

.speaking-title {
  font-weight: 600;
  position: relative;
  margin-left: 1rem;
}

.speaking-meta {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--s);
}

.speaking-conf {
  font-size: var(--small);
  opacity: 0.7;
}

.speaking-badge {
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: white;
}

.speaking-links a {
  position: relative;
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

/* animated underline */
.speaking-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--fast);
}

.speaking-links a:hover::after,
.speaking-links a:focus-visible::after {
  transform: scaleX(1);
}

.accordion-section {
  margin-bottom: var(--l);
}

.accordion-content {
  margin-top: var(--s);
  margin-left: calc(16px + var(--m));
  width: calc(100% - (16px + var(--m)));
  max-width: calc(100% - (16px + var(--m)));
  padding: var(--m);
  background: rgba(0, 0, 0, 0.03);
  border-radius: var(--radius-s);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--slow), transform var(--slow);
}

body.dark .accordion-content {
  background: var(--bg);
}

details[open] .accordion-content {
  opacity: 1;
  transform: translateY(0);
}

.accordion-content a {
  display: inline-block;
  margin: var(--m);
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

.accordion-content .publication-quote {
  margin: var(--l) 0;
  padding: var(--m) var(--l);
  border-left: 4px solid var(--accent);
  background: rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-s);
}

body.dark .accordion-content .publication-quote {
  background: var(--quote-bg);
}

.accordion-content .publication-quote-text {
  margin: 0;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-style: italic;
  font-size: var(--text-m);
  color: var(--quote);
}

.accordion-content .publication-quote-author {
  margin-top: var(--s);
  text-align: right;
  font-size: var(--small);
  color: var(--text-muted);
}

details[open] .publication-quote {
  animation: fadeUp 0.35s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================================
   PUBLICATIONS – QUOTES
========================================================= */
.publication-quote {
  margin: var(--l) 0;
  padding: var(--m) var(--l);
  border-left: 4px solid var(--accent);
  background: rgba(0, 0, 0, 0.03);
  border-radius: var(--radius-s);
}

body.dark .publication-quote {
  background: rgba(255, 255, 255, 0.05);
}

.publication-quote-text {
  margin: 0;
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-style: italic;
  font-size: var(--text-m);
  color: var(--quote);
}

.publication-quote-author {
  margin-top: var(--s);
  text-align: right;
  font-style: normal;
  font-size: var(--small);
  color: var(--text-muted);
}

/* =========================================================
   TESTIMONIALS
========================================================= */
.testimonials-section {
  display: flex;
  flex-direction: column;
  gap: var(--m);
}

.testimonial {
  margin: 1rem;
  padding: var(--l) var(--xl);
  background: rgba(0, 0, 0, 0.03);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-s);
}

body.dark .testimonial {
  background: var(--bg);
  border-left-color: var(--accent);
}

.testimonial blockquote {
  margin: 0 0 var(--s);
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-style: italic;
  font-size: var(--text-m);
  color: var(--quote);
}

.testimonial blockquote p {
  margin: 0 0 1rem;
}

.testimonial blockquote p:last-child {
  margin-bottom: 0;
}

.testimonial figcaption {
  font-size: var(--small);
  color: var(--text-muted);
  text-align: right;
}

/* =========================================================
   CV
========================================================= */
.cv-summary {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.cv-title-group {
  display: inline-flex;
  align-items: baseline;
  gap: var(--m);
}

.cv-meta {
  font-size: var(--text-s);
  font-weight: 300;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: 1rem;
}

.cv-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--xl);
}

.cv-grid .speaking-year {
  margin: var(--xl);
}

/* =========================================================
   FOOTER
========================================================= */
footer {
  margin-top: var(--xxl);
  opacity: 0.7;
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 800px) {
  .page {
    padding: 0;
  }

  /* About + CV stack */
  .content-section,
  .cv-grid {
    grid-template-columns: 1fr;
  }
}
  
@media (max-width: 800px) {
 .speaking-summary {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--s) 0;
  }

  .speaking-summary::before {
    margin-top: 2px;
    flex-shrink: 0;
  }

  .speaking-title {
    font-weight: 600;
    line-height: 1.3;
  }

  .speaking-meta {
    display: inline-flex;
    align-items: center;
    gap: var(--s);
    flex-wrap: wrap;
    margin-left: var(--m);
    font-size: var(--text-s);
    opacity: 0.8;
  }

  .speaking-conf {
    white-space: normal;
  }

  .speaking-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-pill);
  }

 .accordion-content {
    margin-left: 0;
    width: 100%;
    max-width: 100%;
    padding: var(--m);
  }

  /* CV role + meta stack vertically on mobile */
  .cv-title-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  /* Remove pipe separator on mobile */
  .cv-meta::before {
    content: none;
  }

  .accordion-content {
    margin-left: 0;
    width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 800px) {

  /* NAV stays normal */
  nav {
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  /* hamburger */
  #menuToggle {
    display: block;
    background: none;
    color: var(--font);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1002;
  }

  /* mobile drawer */
  .mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 75%;
    max-width: 280px;
    background: var(--bg-menu);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow);

    transform: translateX(-100%);
    transition: transform var(--slow);

    padding: calc(8rem + var(--s)) var(--s) var(--s);
    z-index: 1001;
  }

  nav.open .mobile-menu {
    transform: translateX(0);
  }

  /* menu items vertical */
  #menuList {
    display: flex;
    flex-direction: column;
    gap: var(--l);
  }

}