:root {
  --color-navy: #002147; /* Dark Blue */
  --color-gold: #FFD700; /* Gold */
  --color-light-grey: #F5F5F5; /* Light Gray */
  --color-deep-blue: #1f2641; /* Deep Blue */
  --color-white: #fff; /* White */
  --color-medium-grey: #222; /* Medium Grey */
  --highlight-gold: #f4b400; /* Highlight Gold */
  --shadow-color: rgba(0, 33, 71, 0.4); /* Shadow Color */

  --background-gradient: linear-gradient(290deg, var(--color-navy), var(--color-deep-blue), var(--color-gold));
  --color-accent: linear-gradient(to right, var(--color-navy), var(--color-gold));
}

body {
  background-color: var(--color-light-grey); /* Light Gray */
  color: var(--color-navy); /* Navy Blue */
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

/* Main Container */
.container {
  background-color: var(--color-white); /* White */
  padding: 20px 30px;
  border-radius: 8px;
  box-shadow: 0 0 10px var(--shadow-color); /* Use shadow color */
  text-align: center;
  width: 90%;
  max-width: 400px;
}

/* Headings */
h2 {
  margin-bottom: 20px;
  color: var(--color-navy); /* Navy Blue */
}

/* Input Fields */
input[type="email"] {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border: 1px solid var(--color-navy); /* Navy Blue */
  border-radius: 4px;
  background-color: var(--color-white); /* White */
  color: var(--color-navy); /* Navy Blue */
}

/* Buttons */
button {
  background-color: var(--color-gold); /* Gold */
  color: var(--color-navy); /* Navy Blue */
  padding: 12px;
  border: none;
  border-radius: 4px;
  width: 100%;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: var(--highlight-gold); /* Darker Gold */
}

/* Flash Messages */
.flash-message {
  margin-bottom: 15px;
  padding: 10px;
  border-radius: 4px;
  color: var(--color-white); /* White */
}

.flash-success {
  background-color: #4CAF50; /* Green */
}

.flash-error {
  background-color: #F44336; /* Red */
}

/* Background Slideshow */
.background-slideshow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-size: cover;
  background-position: center;
  animation: slide 10s infinite;
}

@keyframes slide {
  0% { background-image: url('../img/slide1.png'); }
  25% { background-image: url('../img/slide2.jpg'); }
  50% { background-image: url('../img/slide3.webp'); }
  75% { background-image: url('../img/slide4.jpg'); }
  100% { background-image: url('../img/slide1.png'); }
}