#viz2 {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

#viz2-explanation {
  max-width: 800px;
  margin: 0 auto 50px auto;
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
  color: #ddd;
  padding-top: 80px;
}

#viz2-explanation h2 {
  color: #9CDCFE;
  font-size: 26px;
  margin-bottom: 10px;
  font-weight: bold;
}

#viz2-container {
  position: relative;
  width:100%;
  height:100%
  z-index: 1;
  background: transparent;
  perspective: 1000px;
}

.starfield-theme {
  background: radial-gradient(circle at 30% 30%, #0c1a2a, #05060d);
  color: #eee;
  min-height: 100vh;
}

.starfield-theme * {
  color: inherit;
  font-family: inherit;
}


@keyframes orbit-rotation {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes counter-rotate {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(-360deg);
  }
}

.planet-orbit {
  position: relative;
  width: 500px;
  height: 800px;
  margin: 0 auto;
  margin-top: 3rem;
  z-index: 1;
  animation: orbit-rotation 30s linear infinite;
  transform: rotateX(20deg);
  transform-style: preserve-3d;
  perspective: 1000px;
  transition: transform 0.8s ease;
}

.planet-orbit.focused {
  transform: rotateX(20deg) scale(1.2) translateY(-80px);
}

.planet-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform-style: preserve-3d;
  perspective: 1000px;}



.planet {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  z-index: 1;
  transform-origin: center;
  transition: transform 0.1s linear, opacity 0.1s linear;
  will-change: transform, opacity;
  animation: counter-rotate 30s linear infinite;
}


.planet__logo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.479), rgba(132, 149, 192, 0.466), rgba(0, 20, 60, 0.6));
  box-shadow:
    inset -5px -5px 12px rgba(255, 255, 255, 0.2),
    inset 5px 5px 18px rgba(0, 0, 0, 0.3),
    0 0 30px rgba(80, 130, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  animation: spin 40s linear infinite;
  backdrop-filter: blur(2px);
}

.planet__logo::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,0,0,0.2), transparent 70%);
  pointer-events: none;
  z-index: 2; 
  mix-blend-mode: overlay;
  filter: blur(8px);
}


.planet__logo::after {
  content: "";
  position: absolute;
  top: -30%;
  left: -30%;
  width: 160%;
  height: 160%;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3), rgba(100, 200, 255, 0.15), transparent 80%);
  filter: blur(12px) brightness(1.2);
  opacity: 0.8;
  z-index: -1;
  transition: all 0.6s ease;
}


@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}


.planet__logo-img {
  width: 70%;
  height: auto;
  object-fit: contain;
}


.planet__label {
  margin-top: 0.5rem;
  font-size: 1rem;
  text-align: center;
}

.planet--focused {
  transform: scale(1.1) translateZ(80px) !important;
  z-index: 100;
  transition: transform 0.6s ease, z-index 0.6s;
}

.planet--dimmed {
  opacity: 0.2;
  pointer-events: none;
  transition: opacity 0.5s ease;
}


.stars {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

#tsparticles {
  z-index: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  color: { value: "#ff0000" };
}



.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  width: auto;
  height: auto;
  animation: modalEnter 0.5s ease-out;
}



.modal-content {
  background: rgba(18, 32, 51, 0.75);
  color: #eee;
  padding: 2rem;
  border-radius: 16px;
  max-width: 800px;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 20px rgba(0, 200, 255, 0.2);
}



.close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  color: white;
  cursor: pointer;
}

.close-btn:hover {
  color: #ff6666;
  transform: scale(1.2);
  transition: 0.2s ease;
}

.modal-title {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: #66ccff;
  text-shadow: 0 0 10px rgba(102, 204, 255, 0.8);
  letter-spacing: 1px;
}


.centered-logo {
  width: 180px;
  margin: 1rem auto;
  display: block;
}

.icon-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 2rem 0 1rem;
}

.icon-item {
  position: relative;
  cursor: pointer;
}

.icon-item img {
  width: 100px;
  border-radius: 10px;
  border: 2px solid #555;
  transition: transform 0.3s;
}

.icon-item img:hover {
  transform: scale(1.1);
}

.icon-item span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5rem;
  color: white;
  pointer-events: none;
}

@keyframes shake {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  25% {
    transform: translate(-48%, -50%) rotate(5deg);
  }

  50% {
    transform: translate(-52%, -50%) rotate(-5deg);
  }

  75% {
    transform: translate(-48%, -50%) rotate(3deg);
  }

  100% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
}

.shake {
  animation: shake 0.4s ease-in-out;
}

.story {
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.6;
}

.icon-scene-jv {
  position: relative;
  width: 300px;   
  height: 150px;
  overflow: visible; 
}

.icon-item-jv {
  position: absolute;
  top: 40%;
  left: 40%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  transition: all 0.6s ease;
}

.cover-tm-jv {
  position: absolute;
  top: 0;
  right: 0;
  transform: translate(50%, -50%);
  font-size: 20px;
  opacity: 1;
  z-index: 2;
  animation: fade-out 1s ease 1s forwards;
}


@keyframes fade-out {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.roll-away-jv {
  transform: rotate(360deg) translateX(200px) scale(0);
  opacity: 0;
}

.slide-in-coffee-jv {
  position: absolute;
  top: 70%;
  left: 0%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: transform 0.8s ease, opacity 0.8s ease;
}

.slide-in-coffee-jv.animate {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}


.animation-wrapper-jv {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px; 
}

.question-jv {
  text-align: center;
  margin-top: 1rem;
}

.question-text {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}



.question-feedback {
  margin-top: 1rem;
  font-size: 1.2rem;
  color: white;
}

.question-feedback.correct {
  color: #00ff99;
}

.question-feedback.incorrect {
  color: #ff6666;
}



.modal-content button {
  background: linear-gradient(to right, #00b4d8, #0077b6);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  transition: all 0.3s ease;
}


.modal-content button:hover {
  background: linear-gradient(to right, #90e0ef, #00b4d8);
  transform: scale(1.05);
}


#toggle-btn {
  background-color: #ffd43b;
  color: #fff;
  font-weight: 600;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  margin-top: 1rem;
  cursor: pointer;
  display: block;
  margin: 2rem auto 0 auto;
}

#story-text {
  margin-top: 1rem;
  text-align: left;
  transition: all 1s ease;
  opacity: 1;
}

#acorn-icon-jv {
  position: relative;
}


#coffee-icon-jv {
  z-index: 3;
}


.animation-wrapper-php {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px;
}

#php-animation-container {
  width: 500px;
  height: 2.5em;
  font-size: 2rem;
  font-weight: bold;
  color: white;
  text-align: center;
  overflow: hidden;
}


#php-text {
  transition: opacity 1s ease, transform 1s ease;
  white-space: nowrap;
}

#php-text .fade {
  opacity: 1;
}

#php-suffix {
  display: inline-block;
  margin-left: 0.3rem;
  transition: opacity 1s ease;
}

.php-step-b {
  opacity: 1;
  transform: scale(1.1);
}

.php-step-c {
  opacity: 1;
  transform: scale(1);
}

.php-step-d {
  opacity: 0.7;
  transform: scale(0.9);
}

.fade-part {
  display: inline-block;
  transition: opacity 0.8s ease;
}

.cpp-clock-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 250px;
  margin-bottom: 1rem;
}


.clock-letter {
  position: absolute;
  top: 50%;
  left: 50%;
  transform:
    rotate(calc(30deg * var(--i)))
    translate(85px)
    rotate(calc(-30deg * var(--i)));
  font-size: 1rem;
  color: white;
  font-weight: bold;
}


.matlab-question-wrapper {
  text-align: center;
  margin-top: 1rem;
}

.matt-img {
  display: block;
  margin: 2rem auto;
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid #ffd43b;

  position: relative;
  transform: none !important;
  animation: none !important;
  transition: none !important;
}


.question-buttons button {
  margin: 0 1rem;
  padding: 0.5rem 1.2rem;
  background-color: #ffd43b;
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.question-buttons button:hover {
  background-color: #ffcc00;
}

.monty-img {
  width: 200px;
  margin-top: 1rem;
  border-radius: 12px;
  border: 2px solid #ccc;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.cpp-beautiful-bc {
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 3rem;
  font-weight: bold;
  color: #ffd43b;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.cpp-beautiful-bc .arrow {
  font-size: 2.5rem;
  color: #66ccff;
  animation: pulse-arrow 1.5s ease-in-out infinite;
}

@keyframes pulse-arrow {
  0%, 100% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
}

.fade-image {
  opacity: 0;
  transition: opacity 0.6s ease-in-out;
}

.fade-image.visible {
  opacity: 1;
}

.jv-img {
  width: 100px;
  height: auto;
  border-radius: 12px;
}

#oak-img-jv,
#coffee-img-jv {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: translate(-50%, -60%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.question-buttons {
  display: flex;
  justify-content: center;
  gap: 8rem;
  margin-top: 1rem;
}


.hidden {
  display: none;
}