@import url("https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Mono:wght@300;400&display=swap");

/* =========================================
   RESETS & BASE
   ========================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  color-scheme: dark;

  --dark-bg: #0a0a0f;
  --dark-fg: #e8e4d9;
  --dark-muted: #6a6a7e;
  --dark-accent: #c8ff47;
  --dark-card-bg: rgba(10, 10, 15, 0.16);
  --dark-card-border: rgba(200, 255, 71, 0.18);

  --light-bg: #eef4ff;
  --light-fg: #0b141a;
  --light-muted: #6c8296;
  --light-accent: #1b7ed6;
  --light-card-bg: rgba(245, 249, 255, 0.82);
  --light-card-border: rgba(27, 126, 214, 0.22);

  --bg: var(--dark-bg);
  --fg: var(--dark-fg);
  --muted: var(--dark-muted);
  --accent: var(--dark-accent);
  --card-bg: var(--dark-card-bg);
  --card-border: var(--dark-card-border);

  --font-display: "Bebas Neue", sans-serif;
  --font-mono: "DM Mono", monospace;
  --hairline: 0.0625rem;
  --ui-inset: 2rem;
  --nav-x: calc(var(--ui-inset) + 0.125rem);
  --reveal-offset: 0.625rem;
  --reveal-duration: 0.5s;
  --z-ui: 10;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: var(--light-bg);
  --fg: var(--light-fg);
  --muted: var(--light-muted);
  --accent: var(--light-accent);
  --card-bg: var(--light-card-bg);
  --card-border: var(--light-card-border);
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

/* =========================================
   NAVIGATION BAR & LOGO ANIMATION
   ========================================= */
#top-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--ui-inset) var(--nav-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: var(--z-ui);
  pointer-events: none; 
}

.nav-brand {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--fg);
  letter-spacing: 0.08em;
  pointer-events: auto;
  overflow: hidden;
  height: 2rem; 
}

.brand-name {
  margin-right: 0.5rem;
}

.anim-container {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  font-weight: 400;
  overflow: hidden;
  height: 2rem; 
  padding: 0 0.8rem;
  position: relative;
  color: var(--accent);
}

.anim-container::before,
.anim-container::after {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 1rem;
  animation: opacity 2s infinite;
}

.anim-container::before {
  content: '[';
  left: 0;
}

.anim-container::after {
  content: ']';
  right: 0;
}

.anim-list {
  margin: 0;
  padding: 0;
  text-align: left;
  list-style: none;
  animation: change 10s infinite;
}

.anim-item {
  line-height: 2rem; 
  height: 2rem; 
  margin: 0;
  display: flex; 
  align-items: center; 
}

@keyframes opacity {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

@keyframes change {
  0%, 12.66%, 100% { transform: translate3d(0, 0, 0); }
  16.66%, 29.32% { transform: translate3d(0, -25%, 0); }
  33.32%, 45.98% { transform: translate3d(0, -50%, 0); }
  49.98%, 62.64% { transform: translate3d(0, -75%, 0); }
  66.64%, 79.3% { transform: translate3d(0, -50%, 0); }
  83.3%, 95.96% { transform: translate3d(0, -25%, 0); }
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  pointer-events: auto;
  padding-right: 12rem; 
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--accent);
}

/* =========================================
   WEBGL & UI CONTROLS
   ========================================= */
#webgl-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: 0;
  pointer-events: none;
}

#hud {
  position: fixed;
  top: var(--ui-inset);
  right: var(--ui-inset);
  z-index: var(--z-ui);
  text-align: right;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
}

#hud .progress-bar {
  width: 7.5rem;
  height: var(--hairline);
  background: var(--muted);
  margin-block-start: 0.5rem;
  margin-inline-start: auto;
  position: relative;
  overflow: hidden;
}

#hud .progress-fill {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 0%;
  background: var(--accent);
  transition: width 0.1s linear;
}

#hud .scene-label {
  font-size: 0.6rem;
  color: var(--accent);
  margin-block-start: 0.4rem;
}

#scene-strip {
  position: fixed;
  left: var(--nav-x);
  top: 50%;
  translate: -50% -50%;
  z-index: var(--z-ui);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.scene-dot {
  width: 0.25rem;
  height: 0.25rem;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s, scale 0.3s;
}

.scene-dot.active {
  background: var(--accent);
  scale: 1.8;
}

#theme-toggle {
  position: fixed;
  bottom: var(--ui-inset);
  left: var(--nav-x);
  translate: -50% 0;
  z-index: var(--z-ui);
  width: 2rem;
  height: 2rem;
  border: none;
  background: color-mix(in srgb, var(--muted) 35%, transparent);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

#theme-toggle:hover {
  background: color-mix(in srgb, var(--muted) 55%, transparent);
}

#theme-toggle svg {
  width: 0.875rem;
  height: 0.875rem;
  position: absolute;
  transition: opacity 0.3s ease, rotate 0.3s ease;
  color: var(--accent);
}

:root[data-theme="light"] #theme-toggle svg {
  color: var(--fg);
}

#theme-toggle .icon-sun { opacity: 1; rotate: 0deg; }
#theme-toggle .icon-moon { opacity: 0; rotate: 90deg; }
:root[data-theme="light"] #theme-toggle .icon-sun { opacity: 0; rotate: -90deg; }
:root[data-theme="light"] #theme-toggle .icon-moon { opacity: 1; rotate: 0deg; }

/* =========================================
   CONTENT SECTIONS & CARDS
   ========================================= */
#scroll-container {
  position: relative;
  z-index: 1;
}

section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 10rem 5rem 6rem 5rem; /* Increased top padding to clear nav bar */
}

.text-card {
  max-width: 48rem; 
  padding: 2.5rem 3rem;
  background: var(--card-bg);
  border-left: var(--hairline) solid var(--card-border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* Right-Aligned Card */
.text-card.right {
  margin-inline-start: auto;
  border-left: none;
  border-right: var(--hairline) solid var(--card-border);
  text-align: right;
}

/* Shifts the horizontal accent line to the right */
.text-card.right .h-line {
  transform-origin: right;
  margin-inline-start: auto;
}

/* Center-Aligned Card */
.text-card.center {
  margin-inline: auto;
  border-left: none;
  border-top: var(--hairline) solid var(--card-border);
  text-align: center;
  max-width: 52rem; 
}

/* Centers the horizontal accent line */
.text-card.center .h-line {
  transform-origin: center;
  margin-inline: auto;
  margin-block-end: 1.2rem;
}

:root[data-theme="dark"] .text-card {
  border: var(--hairline) solid var(--card-border);
  border-radius: 14px;
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* =========================================
   ACCORDION STYLING (EDU, EXP & PUB)
   ========================================= */

.edu-block, .exp-block, .pub-block {
  margin-block-start: 2rem;
  display: flex;
  flex-direction: column;
  border-bottom: var(--hairline) solid color-mix(in srgb, var(--card-border) 40%, transparent);
  padding-bottom: 1rem;
}

.edu-block:last-child, .exp-block:last-child, .pub-block:last-child {
  border-bottom: none;
}

.edu-header, .exp-header, .pub-header {
  position: relative;
  cursor: pointer;
  padding-right: 2rem;
  transition: opacity 0.3s ease;
}

.edu-header:hover, .exp-header:hover, .pub-header:hover {
  opacity: 0.8;
}

/* Heading Highlight */
.edu-inst, .exp-company, .pub-title {
  font-family: var(--font-display);
  color: var(--accent);
  line-height: 1;
  letter-spacing: 0.05em;
  font-weight: 400;
  margin: 0 0 0.3rem 0;
  transition: color 0.3s;
}

.edu-inst, .exp-company { font-size: 2.2rem; }
.pub-title { font-size: 1.8rem; } /* Slightly smaller to fit longer publication names */

/* Subheadings */
.edu-degree, .exp-role, .pub-venue {
  font-weight: 600;
  color: var(--fg);
  font-size: 0.85rem;
  margin-bottom: 0.2rem;
}

.edu-major {
  color: color-mix(in srgb, var(--fg) 70%, transparent);
  font-size: 0.8rem;
}

.edu-date, .exp-date {
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  margin-block-start: 0.25rem;
  text-transform: uppercase;
}

/* The Animated Plus Icon */
.expand-icon {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform 0.4s ease;
}

.edu-block.active .expand-icon, 
.exp-block.active .expand-icon,
.pub-block.active .expand-icon {
  transform: translateY(-50%) rotate(45deg); 
}

/* The Hidden Details Section */
.edu-details, .exp-details, .pub-details {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
              opacity 0.4s ease, 
              margin-top 0.4s ease;
}

.edu-block.active .edu-details, 
.exp-block.active .exp-details,
.pub-block.active .pub-details {
  max-height: 800px; /* Accounts for longer abstracts */
  opacity: 1;
  margin-top: 1.5rem;
}

/* Accomplishments & Abstract Text */
.accomplishment-list, .abstract-content p {
  font-size: 0.75rem;
  color: color-mix(in srgb, var(--fg) 85%, transparent);
  line-height: 1.6;
  margin: 0;
}

.accomplishment-list {
  list-style: none;
  padding: 0;
}

.accomplishment-list li {
  margin-bottom: 0.8rem;
  padding-left: 1.25rem;
  position: relative;
}

.accomplishment-list li::before {
  content: '▹'; 
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 0.9rem;
}

.accomplishment-list li:last-child { margin-bottom: 0; }

/* Read Paper Button Link */
.pub-link {
  display: inline-block;
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.pub-link:hover {
  border-color: var(--accent);
}

/* =========================================
   PROJECTS LAYOUT & 3D SLIDER
   ========================================= */
#projects {
 display: flex;
  flex-direction: column !important; /* Forces the title and slider to stack vertically */
  justify-content: center;
  align-items: center;
  padding: 8rem 0 2rem 0 !important; /* Removes side padding so the slider can use the full screen width */
  width: 100vw;
  overflow: hidden;
}

/* Ensure the title card sits nicely above the slider */
.projects-section .text-card.center {
  margin-bottom: 2rem; /* Creates breathing room between the title and the 3D cards */
  z-index: 10;
}

.slides-wrapper {
  width: 100vw;
  height: 65vh; /* Gives the slider plenty of vertical room */
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.project-title-card {
  position: absolute;
  top: 6rem;
  left: 50%;
  transform: translateX(-50%); 
  z-index: 20; 
  width: 90%;
  max-width: 32rem; 
  padding: 2rem 3rem;
}

.project-title-card .h-line {
  margin-inline: auto; 
}

.slides-wrapper {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.slides {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#slides-track {
  display: grid;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-content: center;
}

.slide {
  grid-area: 1 / -1;
  position: relative;
}

.slides button {
  appearance: none;
  background: transparent;
  border: none;
  color: var(--accent);
  position: absolute;
  font-size: 5rem;
  width: 5rem;
  height: 5rem;
  top: 50%;
  transform: translateY(-50%);
  transition: opacity 0.3s, color 0.3s;
  opacity: 0.5;
  z-index: 5;
  cursor: pointer;
  font-family: var(--font-display);
}

.slides button:hover {
  opacity: 1;
  color: var(--fg);
}

.slides button:focus {
  outline: none;
}

#slide-prev { left: 10%; }
#slide-next { right: 10%; }

/* Decreased Card Size */
.slideContent {
  width: 22vw;         /* Reduced from 35vw */
  height: 31vw;        /* Reduced from 48vw */
  max-width: 380px;    /* Caps the size so it never gets too massive */
  max-height: 530px;   /* Keeps the aspect ratio locked */
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  transition: transform 0.5s ease-in-out;
  opacity: 0.7;
  display: grid;
  align-content: center;
  transform-style: preserve-3d;
  transform: perspective(1000px) translateX(calc(100% * var(--offset)))
    rotateY(calc(-45deg * var(--dir)));
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  text-decoration: none; 
  color: #fff;
}

.slideContentInner {
  transform-style: preserve-3d;
  transform: translateZ(3rem);
  transition: opacity 0.3s linear;
  text-shadow: 0 0.2rem 1rem rgba(0,0,0,0.8);
  opacity: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.slideTitle {
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  margin: 0;
  font-family: var(--font-display);
  color: var(--accent);
}

.slideSubtitle {
  font-size: 0.8rem;
  font-weight: normal;
  letter-spacing: 0.2ch;
  text-transform: uppercase;
  margin: 0.5rem 0;
  font-family: var(--font-mono);
}

.slideSubtitle::before {
  content: "— ";
}

.slideDescription {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  line-height: 1.5;
  font-family: var(--font-mono);
  color: #e8e4d9;
}

.slide[data-active="true"] {
  z-index: 2;
  pointer-events: auto;
}

.slide[data-active="true"] .slideContentInner {
  opacity: 1;
}

.slide[data-active="true"] .slideContent {
  --x: calc(var(--px) - 0.5);
  --y: calc(var(--py) - 0.5);
  opacity: 1;
  transform: perspective(1000px);
  cursor: pointer;
  border: var(--hairline) solid var(--card-border);
}

.slide[data-active="true"] .slideContent:hover {
  transition: none;
  transform: perspective(1000px) rotateY(calc(var(--x) * 45deg))
    rotateX(calc(var(--y) * -45deg));
}

/* =========================================
   TYPOGRAPHY & ANIMATION
   ========================================= */
.tag {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-block-end: 1.1rem;
  opacity: 0;
  translate: 0 var(--reveal-offset);
  transition: opacity var(--reveal-duration) ease,
    translate var(--reveal-duration) ease;
}

.tag.visible {
  opacity: 1;
  translate: 0 0;
}

h1, h2 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 0.92;
  opacity: 0;
  translate: 0 1.125rem;
  transition: opacity var(--reveal-duration) ease 0.08s,
    translate var(--reveal-duration) ease 0.08s;
}

h1.visible, h2.visible {
  opacity: 1;
  translate: 0 0;
}

h1 { font-size: clamp(3rem, 8vw, 6.5rem); }
h2 { font-size: clamp(2.2rem, 6vw, 5rem); }

.body-text {
  font-size: 0.78rem;
  line-height: 1.8;
  color: color-mix(in srgb, var(--fg) 55%, transparent);
  margin-block-start: 1.25rem;
  opacity: 0;
  translate: 0 var(--reveal-offset);
  transition: opacity var(--reveal-duration) ease 0.2s,
    translate var(--reveal-duration) ease 0.2s;
}

.body-text.visible {
  opacity: 1;
  translate: 0 0;
}

/* =========================================
   STATS & COMPONENTS
   ========================================= */
.stat-row {
  display: flex;
  gap: 2.5rem;
  margin-block-start: 2rem;
  flex-wrap: wrap;
  opacity: 0;
  translate: 0 var(--reveal-offset);
  transition: opacity var(--reveal-duration) ease 0.3s,
    translate var(--reveal-duration) ease 0.3s;
}

.stat-row.visible {
  opacity: 1;
  translate: 0 0;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--accent);
  line-height: 1;
  transition: color 0.3s;
}

.stat-num:hover {
  color: var(--fg);
}

.stat-label {
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.h-line {
  width: 3.125rem;
  height: var(--hairline);
  background: var(--accent);
  margin-block-end: 1.2rem;
  opacity: 0;
  scale: 0 1;
  transform-origin: left;
  transition: opacity 0.4s ease, scale 0.4s ease;
}

.h-line.visible {
  opacity: 1;
  scale: 1 1;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-block-start: 1.75rem;
  padding: 0.6rem 1.25rem;
  border: var(--hairline) solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  opacity: 0;
  translate: 0 var(--reveal-offset);
  transition: opacity var(--reveal-duration) ease 0.35s,
    translate var(--reveal-duration) ease 0.35s, background 0.2s, color 0.2s;
}

.cta.visible {
  opacity: 1;
  translate: 0 0;
}

.cta:hover {
  background: var(--accent);
  color: var(--bg);
}

.cta svg {
  width: 0.6875rem;
  height: 0.6875rem;
}

/* =========================================
   RESPONSIVE DESIGN
   ========================================= */
@media (width <= 60em) {
  section {
    padding: 8rem 3rem 5rem 3rem;
  }
  .text-card {
    max-width: 36rem;
  }
  #top-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .nav-links {
    padding-right: 0;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .slideContent {
    width: 75vw; 
    height: 110vw; 
  }
  #slide-prev { left: 2%; }
  #slide-next { right: 2%; }
  .project-title-card {
    top: 4rem;
    padding: 1.5rem;
  }
}

@media (width <= 37.5em) {
  :root {
    --ui-inset: 1.25rem;
  }
  section {
    padding: 6rem 1.25rem 4rem 1.25rem;
  }
  .text-card {
    max-width: 100%;
    margin-inline: 0;
  }
  #hud {
    top: 1rem;
    right: 1rem;
  }
  #scene-strip {
    display: none;
  }
  #theme-toggle {
    bottom: 1rem;
    left: 1.25rem;
    translate: 0 0;
  }
  .stat-row {
    gap: 1.5rem;
  }
  .nav-links {
    display: none; 
  }
  .anim-container {
    display: none;
  }
}

@media (width <= 60em) {
  /* ... your other mobile rules ... */
  
  .slideContent {
    width: 60vw;    /* Reduced from 75vw */
    height: 85vw;   /* Reduced from 110vw */
  }
}