/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to bottom right, #e0f2fe, #dcfce7);
  min-height: 100vh;
  padding: 2rem;
  position: relative;
}

/* Logo Fixed Top Left */
.logo-container {
  position: fixed;
  top: 1rem;
  left: 1.5rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: slideInLeft 0.6s ease-out;
}
.logo-container img {
  height: 60px;
}
.university-text {
  margin-top: 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: #1e3a8a;
  text-align: center;
}

/* Back Button Fixed Top Right */
.back-button {
  position: fixed;
  top: 1rem;
  right: 2rem;
  background-color: #1e40af;
  color: white;
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.3s ease, transform 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  animation: slideInRight 0.6s ease-out;
}
.back-button:hover {
  background-color: #2563eb;
  transform: scale(1.05);
}

/* Main Card */
.main-card {
  max-width: 800px;
  margin: 6rem auto 4rem auto;
  background-color: #ffffff;
  padding: 2rem 2.5rem;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  animation: slideIn 0.8s ease-out;
}

h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: #1e40af;
  font-size: 1.8rem;
}

/* Experiment List container */
.experiment-list {
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
}

/* Each experiment box */
.experiment-box {
  background-color: #f8fafc;
  border: 1.5px solid #cbd5e1;
  padding: 1rem 1.2rem;
  border-radius: 12px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease;
}

.experiment-box h3 {
  font-size: 1.1rem;
  color: #1d4ed8;
  margin-bottom: 0.4rem;
}

.experiment-box label {
  font-weight: 600;
  color: #374151;
  display: block;
  margin-top: 0.4rem;
  margin-bottom: 0.15rem;
  font-size: 0.95rem;
}

.experiment-box input {
  width: 100%;
  padding: 0.45rem 0.5rem;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 0.95rem;
  text-align: center; /* Input text center align */
  background-color: #ffffff;
  transition: border-color 0.3s ease;
}

.experiment-box input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 5px rgba(37, 99, 235, 0.6);
}

/* Submit Button container */
.submit-container {
  margin-top: 2.5rem;
  text-align: center;
  animation: fadeIn 1s ease forwards;
}

/* Submit Button style */
.submit-button {
  background-color: #1e40af;
  color: white;
  padding: 0.7rem 2.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 6px 15px rgba(30, 64, 175, 0.4);
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.submit-button:hover {
  background-color: #2563eb;
  transform: scale(1.05);
}

/* Animations */
@keyframes slideIn {
  from {
    transform: translateY(30px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    transform: translateX(-50px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(50px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.animate-slide-in {
  animation: slideIn 0.8s ease-out;
}

.animate-fade-in {
  animation: fadeIn 0.8s ease-in;
}