body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: #f3f4f6;
    color: #111827;
}

.layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1f2937 70%, #0b3b75 100%);
    color: white;
    padding: 20px;
    box-sizing: border-box;
}
.sidebar-logo {
    text-align: center;
    padding: 20px 0 10px;
}

.sidebar-logo img {
    max-width: 170px;   /* perfect size for a 260px sidebar */
    height: auto;
    display: block;
    margin: 0 auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.35));
}


.sidebar h2 {
    color: #ffffff !important;
    margin-top: 0;
    font-size: 1.4rem;
    text-shadow: 0 0 6px rgba(0,0,0,0.8);
}


.sidebar h2::before {
    content: "★ ";
    color: #f97316;
    font-size: 1.1rem;
}

.sidebar nav a {
    display: block;
    color: #d1d5db;
    padding: 6px 0;
    text-decoration: none;
    font-size: 0.95rem;
}

.sidebar nav a:hover {
    color: #ffffff;
}

/* Content */

.content {
    flex: 1;
    background: #ffffff;
    padding: 40px;
    box-sizing: border-box;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.04);
}

h1 {
    font-size: 2rem;
    margin-top: 0;
    border-bottom: 3px solid #0b3b75;
    padding-bottom: 8px;
}

h2 {
    margin-top: 28px;
    font-size: 1.4rem;
    color: #0b3b75;
}

h3 {
    margin-top: 18px;
    font-size: 1.1rem;
    color: #111827;
}

p, li {
    line-height: 1.6;
}

.callout {
    border-left: 4px solid #0b3b75;
    background: #eff6ff;
    padding: 12px 16px;
    margin: 20px 0;
    border-radius: 4px;
}