/* ============= CSS Variables ============= */
:root {
    --primary-blue: #003366;
    --accent-yellow: #FFC300;
    --text-light: #CEF4EB;
    --light-green: rgba(206, 244, 235, 0.8);
    --glass-bg: rgba(206, 244, 235, 0.15);
}

/* ============= Base Styles ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Lato', sans-serif;
    background-image: 
        linear-gradient(to right, 
        rgba(0, 51, 102, 0.3),
        rgba(0, 51, 102, 0.4),
        rgba(0, 51, 102, 0.5),
        rgba(0, 51, 102, 0.6),
        rgba(0, 51, 102, 0.7),
        rgba(0, 51, 102, 0.8),
        rgba(0, 51, 102, 0.9)), 
        url(../images/Merstathero.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding-top: 80px;
    min-height: 100vh;
    color: var(--text-light);
}

/* ============= Navigation ============= */
.navbar {
    background: rgba(0, 51, 102, 0.95) !important;
    padding: 1rem 2rem;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--accent-yellow) !important;
    padding: 0;
    margin-right: 2rem;
}

.navbar-toggler {
    border-color: rgba(255, 195, 0, 0.5);
    padding: 0.35rem 0.75rem;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 195, 0, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-collapse {
    justify-content: flex-end;
}

.navbar-nav {
    align-items: center;
}

.nav-item {
    margin: 0.34rem;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-yellow) !important;
}

.nav-link:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-yellow);
    transition: width 0.3s ease;
}

.nav-link:hover:after,
.nav-link.active:after {
    width: 100%;
}

/* ============= Common Components ============= */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    color: var(--accent-yellow);
    position: relative;
    padding-bottom: 15px;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-yellow);
    border-radius: 2px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 195, 0, 0.3);
}

.highlight {
    color: var(--accent-yellow);
    font-weight: 600;
}

/* ============= Form Components ============= */
.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-light);
}

.form-control, .form-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    padding: 12px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-yellow);
    box-shadow: 0 0 0 0.25rem rgba(255, 195, 0, 0.25);
    color: var(--text-light);
}

.form-control::placeholder {
    color: rgba(206, 244, 235, 0.6);
}

.btn-submit {
    background: var(--accent-yellow);
    border: none;
    color: var(--primary-blue);
    padding: 12px 30px;
    font-weight: 700;
    border-radius: 30px;
    transition: all 0.3s ease;
    display: block;
    margin: 30px auto 0;
    font-size: 1.1rem;
}

.btn-submit:hover {
    background: #e0ac00;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* ============= Footer ============= */
footer {
    background: rgba(255, 196, 0, 0.5);
    color: var(--primary-blue);
    padding: 2rem 0;
    margin-top: auto;
    text-align: center;
    /* Dynamic margin-top: push footer down if content is short */
    margin-top: 8vh;
}

footer p {
    margin: 0;
    font-weight: 500;
}

/* ============= Responsive Design ============= */
@media (max-width: 992px) {
    .navbar-nav {
        padding-top: 1rem;
        text-align: center;
    }
    
    .nav-item {
        margin: 0.5rem 0;
    }
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.5rem;
    }
    
    body {
        padding-top: 70px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .glass-card {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .section {
        padding: 40px 0;
    }
}