/* =========================================
   FINAL PROJECT HUB STYLES
   ========================================= */

/* --- LAYOUT --- */
.fp-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: calc(100vh - 50px);
}

/* --- LEFT NAV --- */
.fp-nav {
    background: var(--panel);
    border-right: 1px solid var(--border);
    padding: 2rem 0;
    position: sticky;
    top: 50px;
    height: calc(100vh - 50px);
    overflow-y: auto;
}

.fp-nav-title {
    font-family: var(--font-main);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--c-read);
    padding: 0 1.5rem;
    margin: 0 0 1rem 0;
}

.fp-nav-section {
    margin-bottom: 1.5rem;
}

.fp-nav-section-title {
    font-family: var(--font-main);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 0.5rem 1.5rem 0.3rem;
    margin: 0;
}

.fp-nav-link {
    display: block;
    padding: 6px 1.5rem;
    font-family: var(--font-main);
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.15s;
    border-left: 2px solid transparent;
}

.fp-nav-link:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.03);
}

.fp-nav-link.active {
    color: var(--c-read);
    border-left-color: var(--c-read);
    font-weight: 700;
}

.fp-nav-link.placeholder {
    color: var(--text-secondary, var(--text-muted));
    opacity: 0.6;
    cursor: default;
}

.fp-nav-link.placeholder:hover {
    color: var(--text-secondary, var(--text-muted));
    background: none;
}

/* --- CONTENT AREA --- */
.fp-content {
    padding: 3rem 3rem 4rem;
    max-width: 800px;
}

/* --- MOBILE NAV TOGGLE --- */
.fp-mobile-toggle {
    display: none;
    width: 100%;
    padding: 12px 1.5rem;
    background: var(--panel);
    border: none;
    border-bottom: 1px solid var(--border);
    color: var(--c-read);
    font-family: var(--font-main);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    text-align: left;
}

.fp-mobile-toggle:hover {
    background: rgba(255, 255, 255, 0.03);
}

.fp-mobile-toggle:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: -2px;
}

/* --- LIGHT MODE --- */
body.article-page.light-mode .fp-nav {
    background: #ffffff;
}

body.article-page.light-mode .fp-nav-link:hover {
    background: rgba(0, 0, 0, 0.03);
}

body.article-page.light-mode .fp-mobile-toggle {
    background: #ffffff;
}

body.article-page.light-mode .fp-mobile-toggle:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
    .fp-layout {
        grid-template-columns: 1fr;
    }

    .fp-nav {
        position: static;
        height: auto;
        padding: 0;
        border-right: none;
        border-bottom: 1px solid var(--border);
        display: none;
    }

    .fp-nav.open {
        display: block;
        padding: 1rem 0;
    }

    .fp-mobile-toggle {
        display: block;
    }

    .fp-content {
        padding: 2rem 1.5rem 3rem;
    }
}