/* ===== Sidebar Navigation Hierarchy ===== */

/* Separator line above each section group (except the first) */
.md-nav--primary .md-nav__item--section:not(:first-child) {
    border-top: 1px solid var(--md-default-fg-color--lightest);
    margin-top: 0.5rem;
    padding-top: 0.25rem;
}

/* Section group label: uppercase, smaller, muted — reads as a category tag */
.md-nav--primary .md-nav__item--section > .md-nav__link,
.md-nav--primary .md-nav__item--section > label.md-nav__link {
    font-size: 0.68rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.55;
    padding-bottom: 0.15rem;
    pointer-events: none;
}

/* Page links inside a section: left accent bar */
.md-nav--primary .md-nav__item--section .md-nav .md-nav__link {
    border-left: 2px solid transparent;
    padding-left: 0.75rem !important;
    transition: border-color 0.15s ease, color 0.15s ease;
}

/* Hover state */
.md-nav--primary .md-nav__item--section .md-nav .md-nav__link:hover {
    border-left-color: var(--md-accent-fg-color);
    opacity: 0.85;
}

/* Active (current page) — solid accent bar + accent color */
.md-nav--primary .md-nav__item--section .md-nav .md-nav__link--active {
    border-left-color: var(--md-accent-fg-color);
    color: var(--md-accent-fg-color) !important;
    font-weight: 600;
}

/* ===== End Sidebar Hierarchy ===== */

/* --- Professional Logo Visibility Optimization --- */

/* Desktop: Significantly enlarge the logo */
.md-logo img {
    height: 3.5rem !important; /* Force a much larger size */
    width: auto;
    max-height: none !important; /* Remove Material default constraints */
    margin: -0.5rem 0; /* Adjust vertical alignment if it's too high */
}

/* Ensure the header container doesn't clip the larger logo */
.md-header__button.md-logo {
    padding: 0;
    margin-right: 1.5rem;
}

/* Mobile & Tablet: Maintain a sensible but visible size */
@media screen and (max-width: 76.25em) {
    .md-logo img {
        height: 2.2rem !important;
        margin: 0;
    }
}