/* 🔥 Electronic RFM Section */
.project-detail-section {
    max-width: 900px;
    margin: 60px auto;
    padding: 0 20px;
    font-family: 'Segoe UI', sans-serif;
}

.project-detail-section ul {
    padding-left: 20px;
    margin-bottom: 20px;
}

.project-detail-section h2 {
    margin-top: 30px;
    font-size: 1.5rem;
    color: #333;
}

.project-link {
    color: inherit;             /* Use the default text color */
    text-decoration: none;     /* Remove underline */
    font-weight: bold;         /* Optional: keep it bold */
}

.project-link:hover {
    text-decoration: underline; /* Optional: underline on hover */
    color: inherit;             /* Prevent hover color change */
}

/* Author Section */
.author-info {
    text-align: right;
    font-size: 0.95em;
    color: #555;
    margin-bottom: 20px;
  }

/* Background Section */
.body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    max-width: 900px;
    margin: 80px auto 0; /* top padding for fixed navbar */
    padding: 40px 20px;

    /* Background image setup */
    background-image: url('/static/image/electronic_rfm/background.jpg');
    background-size: cover;          /* Make it cover the entire area */
    background-position: center;     /* Center the image */
    background-attachment: fixed;    /* Optional: parallax effect */
    position: relative;              /* Needed for overlay positioning */
}

/* Transparent overlay */
.body::before {
    content: "";
    position: fixed;      /* Stays in place while scrolling */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255,255,255,0.7); /* White overlay, 70% opacity */
    z-index: -1;          /* Keep it behind the text */
}

/* Transparent navbar only for pages with class="body" */
.body .topnav {
    background: transparent;
    backdrop-filter: blur(6px);           /* frosted glass effect */
    border-bottom: 1px solid rgba(200, 200, 200, 0.5);
}

/* Image Section */
.figure-card {
    max-width: 980px;                /* similar width */
    margin: 24px auto;
    padding: 14px;                   /* outer light frame space */
    background: linear-gradient(#f4f6f8, #eff2f5); /* soft grey frame */
    border-radius: 14px;
    box-shadow: 0 8px 28px rgba(0,0,0,.10);
}
  

.figure-card .figure-inner {
    background: #fff;
    border-radius: 10px;
    padding: 16px;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.04); /* subtle inner line */
}
  

.figure-card img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 8px;
}
  

.figure-card figcaption {
    text-align: center;
    font-style: italic;
    color: #333;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(0,0,0,.08);       /* faint separator like the screenshot */
}

.table-card figcaption {
    text-align: center;
    font-style: italic;
    color: #333;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(0,0,0,.08);
  }
  

@media (max-width: 640px) {
    .figure-card { padding: 10px; border-radius: 12px; }
    .figure-card .figure-inner { padding: 12px; }
}

/* Table Section */
.rfm-table-container {
    margin: 30px auto;
    max-width: 1000px;
    padding: 20px;
    background: #ffffffcc; /* soft white with transparency */
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(6px);
}

.rfm-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;   /* ensures consistent column widths */
    font-family: 'Segoe UI', sans-serif;
    font-size: 0.95rem;
    color: #2c3e50;
}

.rfm-table thead tr {
    background: linear-gradient(135deg, #0b3d57, #1572a1);
    color: #fff;
}

.rfm-table td, .rfm-table th {
    text-align: center;
    padding: 14px 16px;
    vertical-align: middle;
    line-height: 1.5;
    border-bottom: 1px solid #e6eef3;
    word-wrap: break-word;
}

/* Header cells */
/* .rfm-table th {
    text-align: center;
    padding: 14px 16px;
    font-weight: 700;
    letter-spacing: 0.4px;
} */

/* Table body cells - center everything */
/* .rfm-table td {
    text-align: center;     
    padding: 14px 16px;
    vertical-align: middle;
    line-height: 1.5;
    border-bottom: 1px solid #e6eef3;
    word-wrap: break-word;
} */


/* First column (Cluster labels) bold */
.rfm-table td:first-child {
    font-weight: 700;
    color: #0b3d57;
}

/* Zebra rows */
.rfm-table tbody tr:nth-child(even) {
    background: #f9fcfe;
}

.rfm-table tbody tr:hover {
    background: #eef6fb;
    transition: background 0.25s ease-in-out;
}

/* Caption */
.rfm-table-caption {
    text-align: center;
    margin-top: 12px;
    font-style: italic;
    color: #444;
}