@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

body {
  font-family: 'Inter', Arial, sans-serif;
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  color: #e0e0e0;
  padding: 20px;
  margin: 0;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  backdrop-filter: blur(5px);
}

.toggle-button {
  position: absolute;
  top: 20px;
  right: 10px;
  background: linear-gradient(45deg, #00d4ff, #0099cc);
  border: none;
  padding: 12px 24px;
  color: #ffffff;
  font-size: 0.95em;
  font-weight: 500;
  cursor: pointer;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4), inset 0 2px 4px rgba(255, 255, 255, 0.1);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle-button:hover {
  background: linear-gradient(45deg, #0099cc, #00d4ff);
  box-shadow: 0 6px 30px rgba(0, 212, 255, 0.6), inset 0 2px 4px rgba(255, 255, 255, 0.2);
  transform: translateY(-3px) scale(1.05);
}

.toggle-button i {
  font-size: 1.2em;
}

h1 {
  color: #00d4ff;
  text-align: center;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 30px;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

h1 i {
  color: #00d4ff;
}

label {
  margin-bottom: 10px;
  color: #e0e0e0;
  font-size: 1.1em;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.help-text {
  font-size: 0.9em;
  color: #b0b0b0;
  margin-bottom: 15px;
  display: block;
}

input[type="number"],
textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(0, 212, 255, 0.3);
  color: #e0e0e0;
  padding: 15px;
  width: 100%;
  font-size: 1em;
  border-radius: 15px;
  box-sizing: border-box;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.3), 0 2px 10px rgba(0, 212, 255, 0.1);
  backdrop-filter: blur(10px);
}

input[type="number"]:focus,
textarea:focus {
  border-color: #00d4ff;
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.2), inset 0 4px 8px rgba(0, 0, 0, 0.3);
  outline: none;
  transform: scale(1.02);
}

.btn-primary,
.btn-secondary {
  background: linear-gradient(45deg, #00d4ff, #0099cc);
  border: none;
  padding: 15px 30px;
  color: #ffffff;
  font-size: 1.1em;
  font-weight: 500;
  cursor: pointer;
  border-radius: 50px;
  margin-top: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4), inset 0 2px 4px rgba(255, 255, 255, 0.1);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover,
.btn-secondary:hover {
  background: linear-gradient(45deg, #0099cc, #00d4ff);
  box-shadow: 0 6px 30px rgba(0, 212, 255, 0.6), inset 0 2px 4px rgba(255, 255, 255, 0.2);
  transform: translateY(-3px) scale(1.05);
}

.btn-secondary {
  background: linear-gradient(45deg, #ff6b6b, #ee5a24);
  box-shadow: 0 4px 20px rgba(255, 107, 107, 0.4);
}

.btn-secondary:hover {
  background: linear-gradient(45deg, #ee5a24, #ff6b6b);
  box-shadow: 0 6px 30px rgba(255, 107, 107, 0.6);
}

.box {
  margin-top: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: #00d4ff;
  font-size: 1.05em;
  border-radius: 20px;
  white-space: pre-line;
  backdrop-filter: blur(15px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.box:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), inset 0 4px 8px rgba(0, 0, 0, 0.3);
}

.neumorphic {
  background: rgba(255, 255, 255, 0.05);
  border: none;
  border-radius: 15px;
  box-shadow:
    8px 8px 16px rgba(0, 0, 0, 0.3),
    inset -8px -8px 16px rgba(255, 255, 255, 0.1),
    inset 8px 8px 16px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.neumorphic:hover {
  box-shadow:
    12px 12px 24px rgba(0, 0, 0, 0.4),
    inset -12px -12px 24px rgba(255, 255, 255, 0.15),
    inset 12px 12px 24px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.section {
  display: block;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 25px;
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.hidden {
  display: none;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

footer {
  position: fixed;
  bottom: 15px;
  left: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

footer a {
  color: inherit;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
  color: #00d4ff;
}

@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  .toggle-button {
    position: static;
    margin-bottom: 25px;
    display: flex;
    width: 100%;
    justify-content: center;
  }

  h1 {
    font-size: 2rem;
    flex-direction: column;
  }

  .section {
    padding: 20px;
  }

  label,
  button {
    font-size: 1em;
  }

  input[type="number"],
  textarea {
    font-size: 0.9em;
    padding: 12px;
  }

  .btn-primary,
  .btn-secondary {
    font-size: 1em;
    padding: 12px 20px;
    width: 100%;
    justify-content: center;
  }

  .box {
    padding: 15px;
    font-size: 1em;
  }
}