/* Pastel flicker + noise drift in one animation */
@keyframes pastelFlickerDrift {
  0% {
    opacity: 0.25;
    background-position: 0 0, 0 0;
  }
  50% {
    opacity: 0.3;
    background-position: 0 3.12rem, 0 0;
  }
  100% {
    opacity: 0.25;
    background-position: 0 6.25rem, 0 0;
  }
}

/* Stronger pastel overlay with synced drift */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;

  background-image:
/* Noise texture - vertical lines */ repeating-linear-gradient(
      90deg,
      rgba(0, 0, 0, 0.02) 0px,
      rgba(0, 0, 0, 0.02) 1px,
      transparent 1px,
      transparent 2px
    ),
    /* Diagonal stripes */
      repeating-linear-gradient(
        0deg,
        rgba(106, 90, 205, 0.12) 0px,
        rgba(106, 90, 205, 0.12) 2px,
        rgba(240, 248, 255, 0.12) 2px,
        rgba(240, 248, 255, 0.12) 4px
      );

  background-blend-mode: overlay;
  animation: pastelFlickerDrift 15s linear infinite;
}

/* Keep content above */
body > * {
  position: relative;
  z-index: 1;
}

/* Headings keep retro font */
h1,
h2,
h3 {
  font-family: "Press Start 2P", cursive;
}

p {
  font-family: "Inter", sans-serif;
}

/* Content container */
.container {
  max-width: 75rem;
  margin: 0 auto;
  padding: 1.25rem;
  flex-grow: 1;
}

header {
  background-color: #7b68ee;
  color: #e0ffff;
  padding: 1.25rem 0;
  text-align: center;
  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2);
  border-radius: 0 0 0.9375rem 0.9375rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

header h1 {
  margin: 0;
  font-size: 1.5rem; /* Smaller for mobile-first design */
  text-shadow: 0.1875rem 0.1875rem 0 rgba(0, 0, 0, 0.2);
}

/* Navigation */
nav {
  margin-top: 0.9375rem;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav ul li {
  margin: 0 0.9375rem;
}

nav ul li a {
  color: #e0ffff;
  text-decoration: none;
  font-size: 1.1em;
  padding: 0.5rem 0.9375rem;
  border: 0.12rem solid #e0ffff;
  border-radius: 0.5rem;
  transition: transform 0.15s steps(2, start), box-shadow 0.15s steps(2, start);
  display: block;
  text-shadow: -0.062rem -0.062rem 0 black, 0.062rem -0.062rem 0 black,
    -0.062rem 0.062rem 0 black, 0.062rem 0.062rem 0 black;
  font-family: "Press Start 2P", cursive;
}

nav ul li a:hover,
nav ul li a.active {
  background-color: #ff69b4;
  color: #fff;
  border: 0.12rem solid #6e224a;
  border-radius: 0.37rem;
  transform: translateY(-0.25rem);
  box-shadow: 0.12rem 0.12rem 0 #333;
}
/* Hide navigation links by default on small screens */
.nav-links {
  display: none;
  flex-direction: column;
  width: 100%;
}

/* Show the hamburger menu on small screens */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 1.5rem;
  height: 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
  position: absolute;
  right: 1.5rem;
  top: 1rem;
}

.hamburger .bar {
  width: 2rem;
  height: 0.25rem;
  background-color: #e0ffff;
  border-radius: 0.1em;
  transition: all 0.3s linear;
  transform-origin: 1px;
}

/* Style for when the menu is open */
.nav-links.open {
  display: flex;
}

/* Section */
section {
  padding: 2.5rem 1.25rem;
  margin-bottom: 1.25rem;
  background-color: #fff;
  border-radius: 0.62rem;
  box-shadow: 0 0.12rem 0.12rem rgba(0, 0, 0, 0.5);
}

section h2 {
  color: #6a5acd;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  text-align: center;
  text-shadow: 0.12rem 0.12rem 0 rgba(0, 0, 0, 0.8);
}

section h3 {
  color: #4682b4;
  font-size: 0.9em;
  margin-top: 1.25rem;
  margin-bottom: 0.62rem;
  text-shadow: 0.062rem 0.062rem 0 rgba(0, 0, 0, 0.1);
}

/* Profile Section */
.profile-section {
  display: flex;
  align-items: center;
  margin-bottom: 2em;
  flex-wrap: wrap;
}

.profile-section h1 {
  font-size: 2em;
  margin: 0 0 0.12rem;
  color: #6a5acd;
  text-shadow: 0.12rem 0.12rem 0 rgba(0, 0, 0, 0.1);
}

.profile-section p {
  margin-bottom: 0.62rem;
  font-size: 1em;
  color: #333;
}

/* Research Areas */
.research-areas {
  display: flex;
  justify-content: space-around;
  gap: 1.5625rem;
  margin-top: 2em;
  text-align: center;
  flex-wrap: wrap;
}

.research-card {
  background-color: #f0f8ff;
  border: 0.12rem solid #add8e6; /* Converted from 2px */
  border-radius: 0.62rem; /* Converted from 10px */
  padding: 1.25rem; /* Converted from 20px */
  flex: 1;
  min-width: 17.5rem; /* Converted from 280px */
  box-shadow: 0 0.12rem 0.12rem rgba(0, 0, 0, 0.1); /* Converted from px */
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.research-card:hover {
  transform: translateY(-0.12rem); /* Converted from -5px */
  box-shadow: 0 0.5rem 0.9375rem rgba(0, 0, 0, 0.2); /* Converted from px */
  border-color: #ffd700;
}

.research-card h3 {
  margin-top: 0;
  color: #4682b4;
  font-size: 1.5em;
  text-shadow: 0.062rem 0.062rem 0 rgba(0, 0, 0, 0.1); /* Converted from 1px */
}

.research-card p {
  font-size: 0.9em;
  color: #555;
}

/* Research Grid & Tiles */
.research-grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fit,
    minmax(17.5rem, 1fr)
  ); /* Converted from 280px */
  gap: 1.5625rem; /* Converted from 25px */
  padding: 1.25rem 0; /* Converted from 20px */
}

.research-tile {
  display: block;
  text-decoration: none;
  color: inherit;
  background-color: #fff;
  padding: 0.9rem;
  border-radius: 0.62rem;
  box-shadow: 0 0.25rem 0.62rem rgba(65, 60, 60, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.research-tile:hover {
  transform: translateY(-0.12rem);
  box-shadow: 0 0.5rem 0.9375rem rgba(0, 0, 0, 0.2);
}

.research-tile img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 0.12rem;
  margin: 0 auto 0.62rem;
  border: 0.062rem solid #ddd;
  box-shadow: 0 0.12rem 0.12rem rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
  background-color: #7b68ee;
  color: #e0ffff;
  text-align: center;
  padding: 1.25rem 0;
  margin-top: auto;
  border-radius: 0.9375rem 0.9375rem 0 0;
  box-shadow: 0 -0.25rem 0.5rem rgba(0, 0, 0, 0.2);
}

footer p {
  margin: 0;
  font-size: 0.9em;
}

/* mobile devices */
@media (max-width: 480px) {
  header h1 {
    font-size: 1em;
  }
  section h2 {
    font-size: 1em;
  }
  .container {
    padding: 0.62rem;
  }
  .profile-photo {
    width: 6.25rem;
    height: 6.25rem;
  }
  .profile-info {
    width: 90%;
  }
}
@media (min-width: 769px) {
  #virtual-gamepad {
    display: none !important;
  }
  .hamburger {
    display: none;
  }
  .nav-links {
    display: block;
  }
}

@media (max-width: 768px) {
  header h1 {
    font-size: 1.5rem;
  }
  nav ul {
    flex-direction: column;
    align-items: center;
  }
  nav ul li {
    margin: 0.12rem 0;
  }
  nav ul li a {
    font-size: 0.9em;
    padding: 0.37rem 0.75rem;
  }
  .profile-section {
    flex-direction: column;
    text-align: center;
  }
  .research-areas {
    flex-direction: column;
    align-items: center;
  }
  .research-card {
    width: 90%;
  }
  .research-grid {
    grid-template-columns: 1fr;
  }
}

/* Konami Mode */
body.konami-mode {
  background-color: #0d0f1a !important;
  color: #00ff00 !important;
}

body.konami-mode section,
body.konami-mode .research-card,
body.konami-mode .research-tile,
body.konami-mode details,
body.konami-mode .teaching-entry {
  background-color: #1a1a2e !important;
  color: #00ff00 !important;
  border-color: #00ff00 !important;
  box-shadow: 0 0 0.5rem rgba(0, 255, 0, 0.3) !important;
}

body.konami-mode h1,
body.konami-mode h2,
body.konami-mode h3,
body.konami-mode summary {
  color: #00ff00 !important;
  text-shadow: 0 0 0.1875rem lime, 0 0 0.37rem lime;
}

body.konami-mode nav ul li a {
  color: black !important;
  background-color: lime !important;
  border-color: black !important;
  text-shadow: none !important;
}

body.konami-mode nav ul li a:hover {
  background-color: #222 !important;
  color: lime !important;
  border-color: lime !important;
  box-shadow: 0 0 0.12rem lime !important;
}

body.konami-mode .research-card p,
body.konami-mode .teaching-entry p,
body.konami-mode .profile-section p {
  color: #00ff00 !important;
}

body.konami-mode .profile-photo {
  border-color: #00ff00 !important;
  box-shadow: 0 0 0.5rem rgba(0, 255, 0, 0.3);
}

body.konami-mode header,
body.konami-mode footer {
  background-color: lime !important;
  color: black !important;
  box-shadow: 0 0 0.5rem lime !important;
}

/* CRT flicker + noise drift in one animation */
@keyframes crtFlickerDrift {
  0% {
    opacity: 0.9;
    background-position: 0 0, 0 0;
  }
  50% {
    opacity: 1;
    background-position: 0 3.12rem, 0 0;
  }
  100% {
    opacity: 0.9;
    background-position: 0 6.25rem, 0 0;
  }
}

body.konami-mode::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;

  background-image:
/* Noise texture - vertical lines */ repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.02) 0px,
      rgba(255, 255, 255, 0.02) 1px,
      transparent 1px,
      transparent 2px
    ),
    /* Bright RGB scanlines */
      repeating-linear-gradient(
        0deg,
        rgba(255, 0, 0, 0.05) 0px,
        rgba(0, 255, 0, 0.05) 1px,
        rgba(0, 0, 255, 0.05) 2px,
        transparent 3px
      );

  background-blend-mode: screen;
  animation: crtFlickerDrift 8s linear infinite;
}

#pacman-container {
  position: relative;
  width: 9.375rem;
  height: 9.375rem;
  overflow: visible;
  z-index: 10;
}

#profile-pacman {
  width: 100%;
  transition: transform 0.3s ease;
}

#profile-photo.bite {
  border-color: #00ff00;
  animation: bitePulse 0.3s ease-out;
}

@keyframes bitePulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0.7);
  }
  50% {
    transform: scale(1.1);
    box-shadow: 0 0 0.9375rem 0.12rem #00ff00;
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0.7);
  }
  70% {
    box-shadow: 0 0 0 1.25rem rgba(255, 255, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0);
  }
}

#pacman-container.shake {
  animation: shake 0.5s;
}

#game-area {
  flex-grow: 1;
  height: 12.5rem;
  overflow: hidden;
  margin-top: 0;

  margin-left: -10.9375rem;
  padding-left: 10.9375rem;
  position: relative;
  border-radius: 0.75rem;

  background-color: rgba(46, 43, 95, 0.75);
  border: 0.12rem solid rgba(90, 77, 154, 0.8);

  box-shadow: 0 0 0.37rem rgba(123, 104, 238, 0.5),
    0 0 0.75rem rgba(210, 145, 255, 0.4),
    inset 0 0 0.37rem rgba(160, 128, 255, 0.35);

  animation: arcadeGlow 4s ease-in-out infinite;
}
#game-area .score-display {
  position: absolute;
  font-family: "Press Start 2P", cursive;
  top: 0.12rem;
  left: 1.25rem;
  color: lime;
  font-size: 1.12rem;
  pointer-events: none;
  user-select: none;
  z-index: 10;
}

@keyframes arcadeGlow {
  0%,
  100% {
    box-shadow: 0 0 0.37rem rgba(123, 104, 238, 0.5),
      0 0 0.75rem rgba(210, 145, 255, 0.4),
      inset 0 0 0.37rem rgba(160, 128, 255, 0.35);
  }
  50% {
    box-shadow: 0 0 0.75rem rgba(123, 104, 238, 0.6),
      0 0 1.25rem rgba(210, 145, 255, 0.5),
      inset 0 0 0.5rem rgba(160, 128, 255, 0.4);
  }
}
#game-area::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.05) 0,
    rgba(255, 255, 255, 0.05) 1px,
    transparent 1px,
    transparent 2px
  );
  z-index: 10;
  border-radius: 0.75rem;
}
#game-area canvas {
  display: block;
  width: calc(100% - 0.62rem);
  height: 100%;
  margin-left: 0.62rem;
  background: #1c162b;
  animation: fadeIn 0.3s ease-in forwards;
}

#game-area.game-over canvas {
  animation: fadeOut 0.5s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@keyframes shake {
  0% {
    transform: translate(0, 0);
  }
  20% {
    transform: translate(-0.12rem, 0);
  }
  40% {
    transform: translate(0.12rem, 0);
  }
  60% {
    transform: translate(-0.12rem, 0);
  }
  80% {
    transform: translate(0.12rem, 0);
  }
  100% {
    transform: translate(0, 0);
  }
}

.profile-photo {
  width: 9.375rem;
  height: 9.375rem;
  border-radius: 10%;
  object-fit: cover;
  border: 0.1875rem solid #7b68ee;
  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform 0.1s ease-in-out, box-shadow 0.1s ease-in-out;
  margin-left: 1.5625rem;
}
.profile-photo:hover {
  transform: translateY(-0.12rem);
}

#profile-photo:active {
  transform: scale(0.95);
  box-shadow: 0 0.12rem 0.12rem rgba(255, 255, 0, 0.5);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0.7);
  }
  70% {
    box-shadow: 0 0 0 1.25rem rgba(255, 255, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 255, 0, 0);
  }
}

.sprite {
  position: absolute;
  top: 50%;
  height: 4rem;
  width: 4rem;
  user-select: none;
  pointer-events: none;
  transition: left 0.1s linear;
  transform: translateY(-50%);
  object-fit: contain;
}

.top-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
}

.profile-info {
  margin-top: 1.25rem;
  box-sizing: border-box;
  max-width: 100%;
  min-width: 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;
}
.profile-info h1 {
  cursor: pointer;
  color: #6a5acd;
  text-shadow: 0 0 0.12rem #7b68ee, 0 0 0.1875rem #d291ff;
  transition: transform 0.2s ease, text-shadow 0.2s ease;
}

.profile-info h1:hover {
  transform: translateY(-0.12rem);
  text-shadow: 0 0 0.25rem #9a86c0, 0 0 0.37rem #d291ff, 0 0 0.62rem #ffb3ff;
}

#pixel-chaser,
#pong {
  text-shadow: 0 0 0.12rem #7b68ee, 0 0 0.1875rem #d291ff;
  cursor: pointer;
  transition: transform 0.2s ease, text-shadow 0.2s ease;
  margin-bottom: 0.2em;
  margin-top: 0.2em;
}
#pixel-chaser:hover,
#pong:hover {
  transform: translateY(-0.12rem);
  text-shadow: 0 0 0.25rem #9a86c0, 0 0 0.37rem #d291ff, 0 0 0.62rem #ffb3ff;
}
.rainbow-sprite {
  position: absolute;
  cursor: pointer;
  /* filter: drop-shadow(0 0 0.12rem white); */
  z-index: 10;
}

.trail-pixel {
  position: absolute;
  width: 0.25rem;
  height: 0.25rem;
  background: red;
  opacity: 0.8;
  pointer-events: none;
  z-index: 9;
}

/* D-pad container for touch devices */
#virtual-gamepad {
  background: none;
  border-top: none;
  padding: 1rem;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 9999;
  visibility: hidden;
  opacity: 0;
  transform: translateY(100%);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#virtual-gamepad.active {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

/* Floating d-pad and action buttons */
.dpad-btn,
.action-btn {
  background-color: rgba(50, 50, 50, 0.85);
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: clamp(2.5rem, 10vw, 4rem); /* Responsive size with min/max */
  height: clamp(2.5rem, 10vw, 4rem);
  padding: 0.5rem;
}
.dpad-btn:active,
.action-btn:active {
  transform: scale(0.9);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.dpad-btn img,
.action-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.dpad {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.dpad-horizontal {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Exit button */
#exit-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  width: clamp(2rem, 8vw, 3rem);
  height: clamp(2rem, 8vw, 3rem);
  background: rgba(200, 0, 0, 0.85);
  color: white;
  font-size: 1.25rem;
  font-weight: bold;
  border-radius: 2%;
  display: none;
  align-items: center;
  justify-content: center;
  text-shadow: -1px -1px 0 black, 1px -1px 0 black, -1px 1px 0 black,
    1px 1px 0 black;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
  z-index: 10000;
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
}

#exit-btn:active {
  transform: scale(0.9);
}
/* #virtual-gamepad {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  display: none;
  justify-content: space-between;
  align-items: flex-end;
  padding: 2vh 3vw;
  box-sizing: border-box;
  z-index: 9999;
  user-select: none;
  pointer-events: auto;
  background-color: rgba(0, 0, 0, 0.4);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

#virtual-gamepad.active {
  display: flex;
}

.dpad {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5vh;
}

.dpad-horizontal {
  display: flex;
  align-items: center;
  gap: 1.5vh;
}

.dpad-center {
  width: 4vh;
  height: 4vh;
}

.dpad-btn:active {
  transform: scale(0.9);
  background-color: #555;
}

.action-buttons {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 3vw;
}

.dpad-btn {
  width: 10vw;
  height: 10vw;
  font-size: 4vw;
  color: white;
  background-color: #333;
  border-radius: 5px;
  opacity: 0.8;
  transition: transform 0.1s ease;
  pointer-events: auto;
}

.action-btn {
  width: 15vw;
  height: 15vw;
  font-size: 5vw;
  font-weight: bold;
  color: white;
  background-color: #007bff;
  border-radius: 50%;
  opacity: 0.8;
  transition: transform 0.1s ease;
  pointer-events: auto;
}

.a-btn {
  background-color: #28a745;
}

.b-btn {
  background-color: #dc3545;
}

.action-btn:active {
  transform: scale(0.9);
  opacity: 1;
}
.dpad-btn img,
.action-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
} */

#doi-fact {
  color: #fff;
  font-size: 0.75rem;
  font-family: "Inter", sans-serif;
}

#doi-gif {
  width: 25%;
  height: auto;
  display: block;
  margin: 0.5em auto;
  border: 0.25em solid #222;
  box-shadow: 0 0.15em 0.15em rgba(0, 0, 0, 0.5);
  border-radius: 2.5%;
}

#doi-countdown-initiator {
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
  width: 2rem;
  height: auto;

  display: block;
  margin: 0.5em auto;
}

#doi-countdown-initiator:hover {
  transform: scale(1.1);
  filter: brightness(1.2);
}

#doi-countdown-initiator:active {
  transform: scale(0.95);
}
#countdown-display {
  text-align: center;
}