.collaboration-section {
  position: relative;
  padding: 80px 20px;
  text-align: center;
  /* border-top: 1px solid rgba(255, 255, 255, 0.1); */
}

.section-header {
  margin-bottom: 80px;
}

.section-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 15px;
  background: linear-gradient(135deg,
      #667eea 0%,
      #764ba2 25%,
      #f093fb 50%,
      #f5576c 75%,
      #4facfe 100%);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: colorShift 10s ease infinite;
}

@keyframes colorShift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.section-subtitle {
  font-size: 1.2rem;
  color: #8b949e;
}

.solar-system {
  position: relative;
  width: 1100px;
  height: 1100px;
  margin: 0 auto;
}

.sun {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 180px;
  height: 180px;
  background: rgba(22, 27, 34, 0.8);
  border: 3px solid #667eea;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  box-shadow: 0 0 40px rgba(102, 126, 234, 0.6),
    0 0 80px rgba(118, 75, 162, 0.4);
  backdrop-filter: blur(10px);
}

.sun img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
}

/* orbit paths */
.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-1 {
  width: 300px;
  height: 300px;
  animation: rotateClockwise 20s linear infinite;
}

.orbit-2 {
  width: 480px;
  height: 480px;
  animation: rotateAntiClockwise 25s linear infinite;
}

.orbit-3 {
  width: 660px;
  height: 660px;
  animation: rotateClockwise 30s linear infinite;
}

.orbit-4 {
  width: 840px;
  height: 840px;
  animation: rotateAntiClockwise 35s linear infinite;
}

.orbit-5 {
  width: 1020px;
  height: 1020px;
  animation: rotateClockwise 40s linear infinite;
}

/* planet - university logo */
.planet {
  position: absolute;
  width: 90px;
  height: 90px;
  top: 50%;
  left: 50%;
}

.planet-inner {
  width: 100%;
  height: 100%;
  background: rgba(22, 27, 34, 0.9);
  border: 2px solid #30363d;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  backdrop-filter: blur(8px);
  transform: rotate(0deg);
}

.planet-inner:hover {
  transform: scale(1.15) rotate(0deg);
  border-color: #667eea;
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

.planet img {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
}

/* positioning planets on orbits */
.orbit-1 .planet:nth-child(1) {
  transform: translate(-50%, -50%) rotate(0deg) translateX(150px) rotate(0deg);
}

.orbit-1 .planet:nth-child(2) {
  transform: translate(-50%, -50%) rotate(180deg) translateX(150px) rotate(-180deg);
}

.orbit-2 .planet:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg) translateX(240px) rotate(-45deg);
}

.orbit-2 .planet:nth-child(2) {
  transform: translate(-50%, -50%) rotate(225deg) translateX(240px) rotate(-225deg);
}

.orbit-3 .planet:nth-child(1) {
  transform: translate(-50%, -50%) rotate(90deg) translateX(330px) rotate(-90deg);
}

.orbit-3 .planet:nth-child(2) {
  transform: translate(-50%, -50%) rotate(270deg) translateX(330px) rotate(-270deg);
}

.orbit-4 .planet:nth-child(1) {
  transform: translate(-50%, -50%) rotate(135deg) translateX(420px) rotate(-135deg);
}

.orbit-4 .planet:nth-child(2) {
  transform: translate(-50%, -50%) rotate(315deg) translateX(420px) rotate(-315deg);
}

.orbit-4 .planet:nth-child(3) {
  transform: translate(-50%, -50%) rotate(45deg) translateX(420px) rotate(-315deg);
}

.orbit-5 .planet:nth-child(1) {
  transform: translate(-50%, -50%) rotate(30deg) translateX(510px) rotate(-30deg);
}

.orbit-5 .planet:nth-child(2) {
  transform: translate(-50%, -50%) rotate(210deg) translateX(510px) rotate(-210deg);
}

/* rotation animations */
@keyframes rotateClockwise {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

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

  to {
    transform: translate(-50%, -50%) rotate(-360deg);
  }
}

/* tablet view */
@media (max-width: 1024px) {
  .section-title {
    font-size: 2.5rem;
  }

  .solar-system {
    width: 750px;
    height: 750px;
  }

  .sun {
    width: 140px;
    height: 140px;
  }

  .sun img {
    width: 110px;
    height: 110px;
  }

  .orbit-1 {
    width: 260px;
    height: 260px;
  }

  .orbit-2 {
    width: 400px;
    height: 400px;
  }

  .orbit-3 {
    width: 540px;
    height: 540px;
  }

  .orbit-4 {
    width: 680px;
    height: 680px;
  }

  .orbit-5 {
    width: 820px;
    height: 820px;
  }

  .planet {
    width: 70px;
    height: 70px;
  }

  .planet img {
    width: 55px;
    height: 55px;
  }

  .orbit-1 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(0deg) translateX(130px) rotate(0deg);
  }

  .orbit-1 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(180deg) translateX(130px) rotate(-180deg);
  }

  .orbit-2 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(45deg) translateX(200px) rotate(-45deg);
  }

  .orbit-2 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(225deg) translateX(200px) rotate(-225deg);
  }

  .orbit-3 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(90deg) translateX(270px) rotate(-90deg);
  }

  .orbit-3 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(270deg) translateX(270px) rotate(-270deg);
  }

  .orbit-4 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(135deg) translateX(340px) rotate(-135deg);
  }

  .orbit-4 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(315deg) translateX(340px) rotate(-315deg);
  }

  .orbit-4 .planet:nth-child(3) {
    transform: translate(-50%, -50%) rotate(0deg) translateX(340px) rotate(-315deg);
  }

  .orbit-5 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(30deg) translateX(410px) rotate(-30deg);
  }

  .orbit-5 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(210deg) translateX(410px) rotate(-210deg);
  }
}

/* mobile view - show only 3 orbits */
@media (max-width: 640px) {
  .collaboration-section {
    padding: 60px 15px;
  }

  .section-header {
    margin-bottom: 50px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .solar-system {
    width: 320px;
    height: 320px;
  }

  .sun {
    width: 90px;
    height: 90px;
  }

  .sun img {
    width: 70px;
    height: 70px;
  }

  /* hide outer orbits on mobile */
  .orbit-4,
  .orbit-5 {
    display: none;
  }

  .orbit-1 {
    width: 150px;
    height: 150px;
  }

  .orbit-2 {
    width: 220px;
    height: 220px;
  }

  .orbit-3 {
    width: 290px;
    height: 290px;
  }

  .planet {
    width: 50px;
    height: 50px;
  }

  .planet img {
    width: 38px;
    height: 38px;
  }

  .orbit-1 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(0deg) translateX(75px) rotate(0deg);
  }

  .orbit-1 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(180deg) translateX(75px) rotate(-180deg);
  }

  .orbit-2 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(60deg) translateX(110px) rotate(-60deg);
  }

  .orbit-2 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(240deg) translateX(110px) rotate(-240deg);
  }

  .orbit-3 .planet:nth-child(1) {
    transform: translate(-50%, -50%) rotate(120deg) translateX(145px) rotate(-120deg);
  }

  .orbit-3 .planet:nth-child(2) {
    transform: translate(-50%, -50%) rotate(300deg) translateX(145px) rotate(-300deg);
  }
}


.tubes-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.left-tube {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: conic-gradient(from 0.25turn at 64% 15%,
      rgb(240, 147, 251),
      138deg,
      transparent);
  filter: blur(1px);
  opacity: 0.3;
}

.right-tube {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: conic-gradient(from 0.75turn at 34% 15%,
      transparent,
      238deg,
      rgb(240, 147, 251));
  filter: blur(1px);
  opacity: 0.3;
}

.bgsponsor {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -6;
  border: 2px solid black;
  background: radial-gradient(closest-side, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.48) 51%, rgb(0, 0, 0) 100%) 0% 0% no-repeat padding-box padding-box rgb(158, 74, 138);
}

.centertubes{
  display: flex;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
/* @keyframes breathe {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.3;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 0.5;
  }
} */
@media (max-width: 768px) {

  .left-tube,
  .right-tube {
    height: 200px;
  }

  .glow-effect {
    width: 400px;
    height: 400px;
  }
}

/* Tube Effects */

/* .radial-grd {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 40%;
  background: radial-gradient(
    ellipse at center,
    rgba(109, 55, 118, 0.6) 0%,
    transparent 70%
  );
  filter: blur(40px);
  animation: pulse 4s ease-in-out infinite;
} */

/* Content Container */
/* .content-container {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 20px;
  max-width: 1200px;
} */

/* Glow Effect */
/* .glow-effect {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(109, 55, 118, 0.3) 0%,
    transparent 70%
  );
  filter: blur(60px);
  animation: breathe 5s ease-in-out infinite;
  pointer-events: none;
} */

/* Animations */
/* @keyframes pulse {
  0%,
  100% {
    opacity: 0.6;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translateX(-50%) scale(1.05);
  }
} */

/* @keyframes float {
  0%,
  100% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  50% {
    transform: translateY(-100px) translateX(50px);
  }
} */

/* @keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.content-container {
  animation: fadeIn 1s ease-out;
} */

/* Responsive */