/* --- Base Styles --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Inter", system-ui, sans-serif; background: #f4f6f8; color: #1f2937; line-height: 1.6; }
h1,h2,h3,h4,h5,h6 { margin-bottom: 0.5rem; }

/* --- Top Menu --- */
header { background: #ffffff; padding: 15px 30px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.top-bar { display: flex; justify-content: space-between; align-items: center; }
#menu ul { display: flex; list-style: none; gap: 20px; }
#menu a { text-decoration: none; color: #1f2937; font-weight: 500; transition: color 0.2s; }
#menu a:hover { color: #3a86ff; }

/* --- Report Page Title --- */
.report-page-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    color: #3a86ff;
    margin-bottom: 25px;
    position: relative;
    margin-top: 25px;
}
.report-page-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 3px;
    background: #3a86ff;
    margin: 10px auto 0 auto;
    border-radius: 2px;
}

/* --- PDF Report List --- */
.report-list {
    max-width: 800px;
    margin: 0 auto 40px auto;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.report-list li {
    background: #ffffff;
    padding: 15px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.report-list li:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.12);
    background: #f1f5f9;
}
.report-list a {
    text-decoration: none;
    color: #1f2937;
    font-weight: 500;
    font-size: 1rem;
    display: block;
}
.report-list a:hover {
    color: #3a86ff;
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
    body { background: #121821; color: #e2e7e5; }

    header { background: #1e293b; box-shadow: 0 2px 8px rgba(0,0,0,0.5); }
    #menu a { color: #e2e7e5; }
    #menu a:hover { color: #3a86ff; }

    .report-page-title { color: #3a86ff; }
    .report-page-title::after { background: #3a86ff; }

    .report-list li {
        background: #1e293b;
        box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    }
    .report-list li:hover {
        background: #152136;
        box-shadow: 0 6px 18px rgba(0,0,0,0.7);
    }
    .report-list a { color: #e2e7e5; }
    .report-list a:hover { color: #3a86ff; }
}