/* ==========================================================================
   OBSIDIAN PRO — NAVBAR
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    z-index: 1400;
    height: var(--navbar-height);
    background-color: var(--bg-raised);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 24px rgba(0,0,0,0.5);
    padding: 0;
}

.container-fluid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--space-md);
    gap: var(--space-sm);
}

/* ── Brand ── */
.navbar-brand {
    color: var(--text-primary) !important;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
    flex-grow: 0;
    margin-right: auto;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar-brand::before {
    content: '';
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow-strong);
}

/* ── Sidebar toggle ── */
.sidebar-toggle {
    margin-right: var(--space-sm);
    order: -1;
    border: 1px solid var(--border) !important;
    padding: 8px 12px !important;
    font-size: 15px;
    background: transparent !important;
    color: var(--text-secondary) !important;
    border-radius: var(--radius-sm) !important;
    transition: all var(--ease-fast);
    z-index: 1001;
}
.sidebar-toggle:hover {
    background: var(--bg-hover) !important;
    border-color: var(--primary) !important;
    color: var(--primary-light) !important;
}
body.edit-mode:not(.sidebar-collapsed) .sidebar-toggle,
body.running-mode:not(.sidebar-collapsed) .sidebar-toggle,
body.sidebar-open .sidebar-toggle {
    background: var(--primary-glow) !important;
    border-color: var(--primary) !important;
    color: var(--primary-light) !important;
}

/* Hide sidebar toggle in results mode */
body.results-mode .sidebar-toggle {
    display: none !important;
}

/* ── Navbar collapse / nav ── */
.navbar-collapse {
    display: flex;
    flex-grow: 0;
    align-items: center;
    height: 100%;
}

.navbar-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    height: 100%;
    gap: var(--space-xs);
    list-style: none;
}

.nav-item { margin: 0; }

/* ── Nav links (mode tabs) ── */
.nav-link {
    position: relative;
    color: var(--text-secondary) !important;
    padding: 8px 14px !important;
    border-radius: var(--radius-sm);
    transition: all var(--ease-fast);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary) !important;
    background: var(--bg-hover);
    border-color: var(--border);
}

.nav-link.active {
    color: var(--primary-light) !important;
    background: var(--primary-glow);
    border-color: var(--border-accent);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px; left: 20%; right: 20%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px 2px 0 0;
}

.nav-link i {
    font-size: 0.8125rem;
}

/* ── Database / utility buttons ── */
.data-visualizer-nav-btn {
    position: relative;
    transition: all var(--ease-fast);
}
.data-visualizer-nav-btn:hover {
    background: var(--bg-hover) !important;
    border-radius: var(--radius-sm);
}
.data-visualizer-nav-btn:focus {
    box-shadow: 0 0 0 3px var(--primary-glow) !important;
}

/* ─── Responsive ─── */
@media (max-width: 767.98px) {
    .navbar { height: 56px; }
    .container-fluid { padding: 0 12px; position: relative; }
    .navbar-brand { font-size: 1rem; }

    .navbar-collapse {
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--bg-raised);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        z-index: 999;
        padding: var(--space-sm);
    }

    .navbar-nav {
        flex-direction: column;
        padding: 4px 0; gap: 4px;
        width: 100%;
    }
    .nav-item { width: 100%; margin: 0; }
    .nav-link {
        padding: 12px 16px !important;
        border-radius: var(--radius-sm);
        justify-content: flex-start;
        font-size: 0.95rem;
        width: 100%;
        border: 1px solid var(--border);
    }
    .nav-link.active::after { display: none; }
}

@media (min-width: 768px) and (max-width: 1023.98px) {
    .nav-link .nav-text { display: none; }
    .nav-link { padding: 8px !important; justify-content: center; min-width: 40px; }
    .navbar-brand { flex-grow: 0; margin-right: auto; }
}

@media (min-width: 1024px) {
    .navbar-brand { flex-grow: 0; margin-right: auto; }
    .nav-link { padding: 8px 16px !important; }
    .navbar-toggler:not(.sidebar-toggle) { display: none; }
}