/* ---------------------------
    1. VARIABLES & BASE
--------------------------- */
:root {
  --bg: #0f2f2f;
  --bg-light: #1f3f3f;
  --text: #e8f6f6;
  --accent: #4db6ac;
  --accent-dark: #00897b;
  --header-height: 100px;
}

[data-theme="dark"] {
  --bg: #0b1a1a;
  --bg-light: #112525;
  --text: #d8eeee;
  --accent: #5fdad0;
  --accent-dark: #0fa396;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
  line-height: 1.6;
  font-size: clamp(0.9rem, 1.3vw, 1rem);
}

/* ---------------------------
    2. HEADER & NAVIGATION
--------------------------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--bg-light);
  padding: clamp(10px, 1.5vw, 14px) clamp(15px, 2vw, 20px);
  box-sizing: border-box;
  z-index: 1000;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
}

.header-title { 
  margin: 0; 
  font-size: clamp(1.4rem, 4vw, 1.6rem); 
  flex-shrink: 0; 
}

.header-title a { color: inherit; text-decoration: none; order: 1; }

#desktop-nav {
  display: flex;
  gap: clamp(18px, 3vw, 28px);
  align-items: center;
  margin-left: auto;
  margin-right: clamp(20px, 2vw, 30px);
  order: 2;
}

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

.header-controls {
  order: 3; }
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 15px);}

#theme-toggle {
  background: var(--bg-light);
  border: none;
  border-radius: 6px;
  padding: 4px;
  display: flex;
  cursor: pointer;
}

#theme-toggle img {
  filter: brightness(0.75) contrast(0.9) saturate(0.7);
  transition: filter 0.25s ease, transform 0.25s ease;
}

#theme-toggle:hover img {
  filter: brightness(1) contrast(1);
  transform: rotate(12deg);
}

[data-theme="dark"] #theme-toggle img {
  filter: brightness(0.8) contrast(0.85) saturate(0.7);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: clamp(1.5rem, 4vw, 1.8rem);
  cursor: pointer;
}

#mobile-nav {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  gap: clamp(8px, 2vw, 12px);
}

#mobile-nav.open {
  max-height: 500px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------------------------
    3. MAIN CONTENT
--------------------------- */
main {
  padding-top: var(--header-height);
  max-width: 1400px;
  margin: auto;
  padding-left: clamp(20px, 5vw, 60px);
  padding-right: clamp(20px, 5vw, 60px);
}

.page-title {
  font-size: clamp(2rem, 6vw, 2.8rem);
  text-align: center;
  margin-top: clamp(30px, 5vw, 40px);
  margin-bottom: clamp(40px, 6vw, 60px);
  font-weight: 800;
  line-height: 1.2;
  position: relative;
  padding-bottom: 20px;
}

.small-text {
  font-size: clamp(0.85rem, 2vw, 1.5rem);
}

.page-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--accent);
  border-radius: 2px;
}

.section { 
  display: flex; 
  margin: clamp(120px, 12vw, 160px) 0; 
  align-items: center; 
}

.section-content { 
  display: flex; 
  gap: clamp(20px, 4vw, 40px); 
  align-items: center; 
  width: 100%;
  max-width: 1400px;
  margin: auto;
}

.section-content.reverse {  
  flex-direction: row-reverse;
}

.section-image { 
  flex: 1.1; 
}

.section-text { 
  flex: 1; 
  font-size: clamp(1rem, 2.5vw, 1.2rem); 
  line-height: 1.45; 
}

.section img.large-img {
  width: 100%;
  max-width: 700px;
  border-radius: 8px;
}

@media (min-width: 1100px) {
  .section img.large-img {
    max-width: 850px;
  }
}

.widgets {
  display: flex;
  gap: clamp(10px, 3vw, 15px);
  margin-top: clamp(10px,2vw,15px);
  align-items: center;
  justify-content: center; /* Add this line */
}

.widgets img {
  width: clamp(30px, 8vw, 40px);
  height: clamp(30px, 8vw, 40px);
  object-fit: contain;
}

.section-text h2 {
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  margin-bottom: clamp(10px, 3vw, 15px);
}

.section-text ul {
  padding-left: clamp(15px, 4vw, 20px);
}

.section-text li {
  margin-bottom: clamp(5px, 1.5vw, 10px);
}

main a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.section-divider {
  text-align: center;
  margin: 4rem 0 3rem;
}

.section-divider h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.section-divider hr {
  width: 80px;
  height: 2px;
  border: none;
  background-color: var(--accent);
  margin: 0 auto;
  border-radius: 2px;
}

.language-card-left {
  text-align: left;
}

.language-card-left h3 {
  text-align: left;
}

.language-card-left ul {
  padding-left: 1.2rem;
}

.language-card-left li {
  text-align: left;
}

.lang-meta {
  display: block;        /* forces next line */
  font-size: 0.85em;     /* smaller than title */
  font-weight: 400;
  opacity: 0.8;
  margin-top: 0.2rem;
}

.language-card ul {
  font-size: 0.95rem;
}

.language-card li {
  font-size: 0.95rem;
  line-height: 1.5;
}

/* ---------------------------
    4. FOOTER & BACK TO TOP
--------------------------- */
footer {
  background: var(--bg-light);
  color: var(--text);
  padding: clamp(30px, 5vw, 40px) 0;
  margin-top: clamp(60px, 10vw, 80px);
}

.footer-row {
  max-width: 1400px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 clamp(15px, 4vw, 20px);
}

.footer-center {
  display: flex;
  align-items: center;
  gap: clamp(10px, 3vw, 20px);
}

.footer-center img {
  width: clamp(24px, 7vw, 32px);
  height: clamp(24px, 7vw, 32px);
  transition: 0.2s ease;
}

[data-theme="dark"] .footer-center img { filter: brightness(0) invert(1); }
[data-theme="dark"] .footer-center img[src*="white"] { filter: none; }

#back-to-top {
  position: fixed;
  bottom: clamp(20px, 4vw, 30px);
  right: clamp(20px, 4vw, 30px);
  width: clamp(40px, 10vw, 45px);
  height: clamp(40px, 10vw, 45px);
  background-color: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 50%;
  font-size: clamp(1.2rem, 4vw, 1.5rem);
  font-weight: bold;
  cursor: pointer;
  display: none;
  z-index: 1001;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

/* ---------------------------
    5. MOBILE RULES
--------------------------- */
@media (max-width: 800px) {

  #desktop-nav { display: none !important; }

  .header-inner { flex-wrap: wrap; }

  .header-title { order: 1; }

  .header-controls { 
    order: 2;
    margin-left: auto;  
	display: flex;
	flex-direction: row;
    align-items: center;
    gap: 12px; }
	

  #theme-toggle { order: 2;  }

  #mobile-nav {  order: 3;  width: 100%; }
  .mobile-menu-toggle { display: block;  order: 1; }

  .section-content,
  .section-content.reverse {
    flex-direction: column;
    align-items: center;
  }

  .section-image,
  .section-text {
    flex: none;
    width: 100%;
  }
  .section-text ul,
  .section-text li {
    font-size: 0.95rem;
  }
  
  .section img.large-img {
    max-width: 100%;
  }

  .section-text h2 { text-align: center; }

  .widgets { justify-content: center; }

  .footer-row {
    flex-direction: column;
    gap: clamp(15px,4vw,20px);
    text-align: center;
  }
}

/* ---------------------------
    6. REVEAL ANIMATIONS
--------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.reveal.in-view .widgets img {
  transition-delay: 0.3s;
}

/* ---------------------------
    7. LANGUAGE GRID (DESKTOP OPTIMISED)
--------------------------- */

.centered-section {
  width: 100%;
  max-width: 1400px;
  margin: auto;
  text-align: center;
}

.centered-section p {
  font-size: clamp(1rem, 1.5vw, 1.25rem);  /* increase size */
  font-weight: 500;                        /* optional: make slightly bold */
  margin-top: 0.5em;                       /* optional spacing from heading */
  line-height: 1.5;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
  margin-top: clamp(2rem,5vw,3rem);
}

.language-card {
  padding: clamp(1.5rem,3vw,2rem);
  border-radius: 14px;
  background: rgba(0,0,0,0.04);
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.language-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 26px rgba(0,0,0,0.25);
}

.language-card h3 {
  margin-bottom: clamp(10px, 2vw, 1rem);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
}

.language-card .lang-title {
  font-size: 1em;
  font-weight: 600;
  display: block;       /* forces each span on its own line */
  line-height: 1.3;     /* optional: adjust spacing */
}

.language-card .lang-sub {
  margin-top: 0.25em;   /* small gap between lines */
  font-size: 0.9em;     /* smaller than title */
  font-weight: 400;     /* not bold */
  opacity: 0.85;        /* lighter text */
  display: block;       /* forces each span on its own line */
  line-height: 1.3;     /* optional: adjust spacing */
}

.language-card .widgets {
  justify-content: center;
  gap: clamp(10px,2vw,1.2rem);
}

.language-card .widgets img {
  width: clamp(36px, 5vw, 48px);
  height: clamp(36px, 5vw, 48px);
}

[data-theme="dark"] .language-card {
  background: rgba(255,255,255,0.06);
}

@media (min-width: 1100px) {
  .language-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------------------------
   8. CONTACT PAGE FIX (Polished)
--------------------------- */
.contact-section {
  display: block;               
  margin: clamp(60px, 8vw, 100px) auto;
  width: 100%;
}

.contact-section form.contact-form {
  max-width: 600px;             
  width: 100%;                  
  margin: 0 auto;               
  display: flex;
  flex-direction: column;       
  gap: clamp(0.75rem, 2vw, 1.25rem); 
}

.contact-section form.contact-form label {
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  font-weight: 600;
  margin-bottom: 0.25em;
}

.contact-section form.contact-form input,
.contact-section form.contact-form textarea {
  width: 100%;                  
  box-sizing: border-box;       
  padding: 0.5em 0.75em;
  font-size: clamp(0.9rem, 1.3vw, 1rem);
  border: 1px solid rgba(0,0,0,0.2);
  border-radius: 6px;
  background-color: var(--bg-light);
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-section form.contact-form input:focus,
.contact-section form.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 6px rgba(77, 182, 172, 0.5);
}

.contact-section form.contact-form button {
  max-width: 200px;            
  width: 100%;                  
  align-self: center;           
  margin-top: 0.5em;            /* spacing above the button */
  padding: 0.75em 1.2em;
  font-size: 1rem;
  font-weight: 600;
  background-color: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.25s ease, transform 0.25s ease;
}

.contact-section form.contact-form button:hover {
  background-color: var(--accent-dark);
  transform: translateY(-2px);
}

/* Bio layout control */
#bio .section-content {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

/* Left text column = 2/3 */
#bio .section-text {
  flex: 0 0 70.0%;
  max-width: 70.0%;
}

/* Right image column = 1/3 */
#bio .section-image {
  flex: 0 0 30.0%;
  max-width: 30.0%;
  display: flex;
  justify-content: center;
}

/* Headshot sizing */
#bio .headshot {
  width: 100%;
  max-width: 300px;
  border-radius: 12px;
  object-fit: cover;
}

/* Mobile stacking */
@media (max-width: 800px) {
  #bio .section-content {
    flex-direction: column;
    align-items: center;
  }

  #bio .section-text,
  #bio .section-image {
    max-width: 100%;
    flex: 0 0 100%;
  }

  #bio .section-image {
    width: 50%;
    margin-bottom: 1rem;
  }
}

/* Publications */
/* Reduce space before publications section */
#publications {
  margin-top: 1.2rem;
  padding-top: 0.3rem;
}

/* Smaller Publications header */
#publications h2 {
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  margin-bottom: 0.6rem;
}

/* Slightly smaller category headers */
#publications .pub-details summary {
  font-size: 1rem;
  padding: 0.25rem 0;
}

/* Smaller publication text */
#publications .publications-list {
  font-size: 0.95rem;
}

/* Tighter line spacing */
#publications .publications-list li {
  margin-bottom: 0.45rem;
  line-height: 1.35;
}

/* Reduce space between collapsible groups */
#publications .pub-details {
  margin-bottom: 0.7rem;
}

/* Clickable category styling */
#publications .pub-details summary {
  background: rgba(77, 182, 172, 0.12); /* uses your accent colour softly */
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  transition: background 0.2s ease;
}

/* Hover effect */
#publications .pub-details summary:hover {
  background: rgba(77, 182, 172, 0.22);
}

/* Open state */
#publications .pub-details[open] summary {
  background: rgba(77, 182, 172, 0.28);
}

/* Poster preview */
.poster-preview {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;

  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  z-index: 9999;
}

.poster-preview img {
  max-width: 85vw;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 0 50px rgba(0,0,0,0.7);
  transform: scale(0.8);
  transition: transform 0.5s ease;
}

/* Hover preview */
.poster-trigger:hover .poster-preview {
  opacity: 1;
  pointer-events: auto;
}

.poster-trigger:hover .poster-preview img {
  transform: scale(1);
}

/* Locked mode */
.poster-preview.locked {
  opacity: 1;
  pointer-events: auto;
}

.poster-preview.locked img {
  transform: scale(1);
}

.poster-trigger {
  color: var(--accent);
  cursor: zoom-in;
  font-weight: 500;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.poster-trigger:hover {
  color: #9ff;
  text-shadow: 0 0 6px rgba(160,255,255,0.4);
}

.poster-preview img {
  cursor: zoom-in;
  transition: transform 0.3s ease;
  user-select: none;
}

.poster-preview img.zoomed {
  cursor: zoom-out;
}