html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overscroll-behavior: none;
}

body {
    background-color: #1a2733;
    color: #ffffff;
    margin: 0;
    padding: 0;
    height: 100%;
}

.container-fluid {
    min-height: 100%;
    min-width: 100%;
}

.shadow {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.bg-dark {
    background-color: #1a2733;
}

.bg-white {
    background-color: #ffffff;
    color: #000;
}

#registerForm .form-control {
    width: 100%;
}

.stacked-card {
    width: 80%;
    max-width: 400px;
}

.navbar {
    background-color: #111920;
    min-height: 70px;
    display: flex;
    align-items: center;
}

.logo-container {
    position: relative;
    z-index: 1;
}

.logo {
    width: 100px;
    position: absolute;
    top: -20px;
    left: 10px;
}

.dropdown-menu {
    background-color: #ffffff;
    color: #000;
    z-index: 1000;
}

footer {
    margin-top: 25px;
}

#about-us .card {
    border: none;
}

.scrollable-topics {
    position: relative;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3E%3Cpath stroke='white' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E") !important;
}

.navbar-toggler:hover,
.navbar-toggler:focus {
    background: none;
    box-shadow: none;
    outline: none;
}

.fixed-size-checkbox {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
}

.password-rules {
    background-color: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
    max-width: 500px;
}

.password-rules ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.password-rules li {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.password-rules li i {
    font-size: 1.2em;
    margin-right: 10px;
    color: #007bff;
}

.form-floating .form-control:not(:placeholder-shown) + label {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.button-loading-spinner {
    display: inline-block;
    margin-left: 0.5rem;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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