/* General Page Styles */
body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
}

.content {
    margin-top: 100px;
    padding: 40px;
}

/* Header / Navbar */
.navbar {
    background-color: #2c3e50;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand,
.navbar-nav .nav-link {
    color: white !important;
    font-weight: bold;
}

.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.3);
}

/* Fixed Custom Header (for diagram page) */
.header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header h1 {
    margin: 0;
    font-size: 20px;
}

.menu {
    display: flex;
    gap: 20px;
    padding-right: 80px;
}

.menu a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

.menu a:hover,
.navbar-nav .nav-link:hover {
    text-decoration: underline;
}

/* Main Event Highlight */
.main-event {
    background-color: #e9f3ff;
    border: 1px solid #99c2ff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.main-event h2 {
    color: #1a4e9f;
}

.event-meta {
    font-size: 14px;
    color: #555;
    margin-bottom: 10px;
}

/* News Section */
.news-item {
    background: white;
    border: 1px solid #ccc;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.news-title {
    font-size: 18px;
    font-weight: bold;
    color: #2c3e50;
    margin: 0;
}

.news-date {
    font-size: 13px;
    color: #666;
}

.news-body {
    margin-top: 8px;
    color: #333;
    line-height: 1.5;
}

/* Balloon Diagram Layout */
.diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.balloon {
    width: 180px;
    height: 180px;
    background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.8), rgba(200, 200, 255, 0.6), rgba(150, 150, 255, 0.4));
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    border: 2px solid rgba(150, 150, 255, 0.6);
}

.string {
    width: 2px;
    background: #333;
    position: absolute;
    top: 180px;
    bottom: 0;
    z-index: -1;
}

/* Payload Box */
.payload {
    width: 400px;
    padding: 16px;
    margin: 20px 0;
    background-color: #fff;
    border: 2px solid #999;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    font-size: 14px;
}

.payload-title {
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 8px;
}

.payload-description {
    flex-grow: 1;
    text-align: center;
    margin: 8px 0;
    color: #333;
}

.payload-mass {
    font-size: 13px;
    margin-top: 8px;
    font-style: italic;
    color: #555;
}

.freq-table {
    margin-top: 12px;
    border-collapse: collapse;
    width: 100%;
    font-size: 13px;
}

.freq-table td {
    padding: 4px 6px;
    border-bottom: 1px solid #ddd;
}

.freq-icon {
    font-weight: bold;
    color: #2c3e50;
    width: 20px;
    display: inline-block;
}

.payload-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
}

.payload-footer a {
    font-size: 13px;
    text-decoration: none;
    color: #2980b9;
}

.payload-footer a:hover {
    text-decoration: underline;
}

/* Responsive adjustment for mobile */
@media (max-width: 576px) {
    .header h1,
    .navbar-brand {
        font-size: 18px;
    }

    .menu a,
    .navbar-nav .nav-link {
        font-size: 14px;
    }

    .content {
        padding: 20px;
    }

    .payload {
        width: 100%;
    }
}