/* Top Navigation Bar Styles */

.top-nav {
    height: var(--header-height);
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

/* Brand Section */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--nav-text);
    font-weight: 600;
    font-size: 1.25rem;
}

.brand-link:hover {
    color: var(--link);
}

.brand-logo {
    height: 32px;
    width: auto;
}

.brand-icon {
    font-size: 1.5rem;
    color: var(--link);
}

.brand-text {
    display: inline-block;
}

/* Navigation Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* Scoped to the top bar: the sidebar's links are styled in sidebar.css. The padding and
   radius used to come from sidebar.css's unscoped .nav-link rule. */
.top-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius);
    position: relative;
    color: var(--nav-text);
    font-weight: 500;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.top-nav .nav-link:hover {
    color: var(--link);
    background-color: var(--bg-tertiary);
}

.top-nav .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 0.875rem;
}

/* User menu: styled in portal.css. Only the photo avatar lives here. */
.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-primary);
}

/* Sidebar Toggle Button (hamburger in navbar) */
.mobile-menu-toggle {
    display: flex;
    background: transparent;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    width: 40px;
    height: 40px;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.mobile-menu-toggle:hover {
    background-color: var(--bg-tertiary);
    transform: scale(1.05);
}

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

.mobile-menu-toggle i {
    font-size: 1.2rem;
    transition: transform var(--transition-fast);
}

.mobile-menu-toggle.active {
    background-color: var(--bg-tertiary);
}

.mobile-menu-toggle.active i {
    transform: rotate(90deg);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .top-nav {
        padding: 0 1rem;
        position: relative;
        justify-content: flex-start;
        gap: 0.5rem;
    }

    .mobile-menu-toggle {
        order: 2;
        z-index: 1001;
    }

    .nav-brand {
        order: 1;
        flex-shrink: 0;
    }

    .user-profile {
        order: 3;
        margin-left: auto;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--nav-bg);
        border-top: 1px solid var(--border-primary);
        border-bottom: 1px solid var(--border-primary);
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        z-index: 999;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-fast);
        order: 4;
        width: 100%;
    }
    
    .nav-links.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links .nav-link {
        padding: 0.75rem 1.5rem;
        border-bottom: 1px solid var(--border-primary);
        justify-content: flex-start;
        width: 100%;
        text-align: left;
    }
    
    .nav-links .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-links .nav-link:hover {
        background-color: var(--bg-hover);
    }
    
    .brand-text {
        display: none;
    }
    
    .user-name {
        display: none;
    }
    
    /* Adjust theme toggle on mobile */
    .theme-toggle-btn {
        margin-right: 0.5rem;
    }
}

/* Extra small screens */
@media (max-width: 480px) {
    .nav-links .nav-link {
        font-size: 0.875rem;
        padding: 0.625rem 1rem;
    }

    .nav-links .nav-link i {
        font-size: 0.875rem;
        width: 16px;
    }
}